docs: README 补充 delete 批量删除与 --dry-run 示例

Made-with: Cursor

.gitea/workflows/secrets.yml

@@ -7,7 +7,6 @@ on:
       - 'src/**'
       - 'Cargo.toml'
       - 'Cargo.lock'
-      - '.gitea/workflows/secrets.yml'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -18,6 +17,7 @@ permissions:
 
 env:
   BINARY_NAME: secrets
+  SECRETS_UPGRADE_URL: ${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/latest
   CARGO_INCREMENTAL: 0
   CARGO_NET_RETRY: 10
   CARGO_TERM_COLOR: always
@@ -56,6 +56,13 @@ jobs:
             echo "将创建新版本 ${tag}"
           fi
 
+      - name: 严格拦截重复版本
+        if: steps.ver.outputs.tag_exists == 'true'
+        run: |
+          echo "错误: 版本 ${{ steps.ver.outputs.tag }} 已存在，禁止重复发版。"
+          echo "请先 bump Cargo.toml 中的 version，并执行 cargo build 同步 Cargo.lock。"
+          exit 1
+
       - name: 创建 Tag
         if: steps.ver.outputs.tag_exists == 'false'
         run: |
@@ -204,9 +211,13 @@ jobs:
           bin="target/x86_64-unknown-linux-musl/release/${{ env.BINARY_NAME }}"
           archive="${{ env.BINARY_NAME }}-${tag}-x86_64-linux-musl.tar.gz"
           tar -czf "$archive" -C "$(dirname "$bin")" "$(basename "$bin")"
+          sha256sum "$archive" > "${archive}.sha256"
           curl -fsS -H "Authorization: token $RELEASE_TOKEN" \
             -F "attachment=@${archive}" \
             "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${{ needs.version.outputs.release_id }}/assets"
+          curl -fsS -H "Authorization: token $RELEASE_TOKEN" \
+            -F "attachment=@${archive}.sha256" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${{ needs.version.outputs.release_id }}/assets"
 
       - name: 飞书通知
         if: always()
@@ -229,7 +240,7 @@ jobs:
           curl -sS -H "Content-Type: application/json" -X POST -d "$payload" "$WEBHOOK_URL"
 
   build-macos:
-    name: Build (aarch64-apple-darwin)
+    name: Build (macOS aarch64 + x86_64)
     needs: [version, check]
     runs-on: darwin-arm64
     timeout-minutes: 15
@@ -241,6 +252,7 @@ jobs:
           fi
           source "$HOME/.cargo/env" 2>/dev/null || true
           rustup target add aarch64-apple-darwin
+          rustup target add x86_64-apple-darwin
           echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
 
       - uses: actions/checkout@v4
@@ -253,12 +265,14 @@ jobs:
             ~/.cargo/registry/cache
             ~/.cargo/git/db
             target
-          key: cargo-aarch64-apple-darwin-${{ hashFiles('Cargo.lock') }}
+          key: cargo-macos-${{ hashFiles('Cargo.lock') }}
           restore-keys: |
-            cargo-aarch64-apple-darwin-
+            cargo-macos-
 
       - run: cargo build --release --locked --target aarch64-apple-darwin
+      - run: cargo build --release --locked --target x86_64-apple-darwin
       - run: strip -x target/aarch64-apple-darwin/release/${{ env.BINARY_NAME }}
+      - run: strip -x target/x86_64-apple-darwin/release/${{ env.BINARY_NAME }}
 
       - name: 上传 Release 产物
         if: needs.version.outputs.release_id != ''
@@ -267,12 +281,29 @@ jobs:
         run: |
           [ -z "$RELEASE_TOKEN" ] && exit 0
           tag="${{ needs.version.outputs.tag }}"
-          bin="target/aarch64-apple-darwin/release/${{ env.BINARY_NAME }}"
-          archive="${{ env.BINARY_NAME }}-${tag}-aarch64-macos.tar.gz"
-          tar -czf "$archive" -C "$(dirname "$bin")" "$(basename "$bin")"
+          release_id="${{ needs.version.outputs.release_id }}"
+
+          arm_bin="target/aarch64-apple-darwin/release/${{ env.BINARY_NAME }}"
+          arm_archive="${{ env.BINARY_NAME }}-${tag}-aarch64-macos.tar.gz"
+          tar -czf "$arm_archive" -C "$(dirname "$arm_bin")" "$(basename "$arm_bin")"
+          shasum -a 256 "$arm_archive" > "${arm_archive}.sha256"
           curl -fsS -H "Authorization: token $RELEASE_TOKEN" \
-            -F "attachment=@${archive}" \
-            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${{ needs.version.outputs.release_id }}/assets"
+            -F "attachment=@${arm_archive}" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${release_id}/assets"
+          curl -fsS -H "Authorization: token $RELEASE_TOKEN" \
+            -F "attachment=@${arm_archive}.sha256" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${release_id}/assets"
+
+          intel_bin="target/x86_64-apple-darwin/release/${{ env.BINARY_NAME }}"
+          intel_archive="${{ env.BINARY_NAME }}-${tag}-x86_64-macos.tar.gz"
+          tar -czf "$intel_archive" -C "$(dirname "$intel_bin")" "$(basename "$intel_bin")"
+          shasum -a 256 "$intel_archive" > "${intel_archive}.sha256"
+          curl -fsS -H "Authorization: token $RELEASE_TOKEN" \
+            -F "attachment=@${intel_archive}" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${release_id}/assets"
+          curl -fsS -H "Authorization: token $RELEASE_TOKEN" \
+            -F "attachment=@${intel_archive}.sha256" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${release_id}/assets"
 
       - name: 飞书通知
         if: always()
@@ -285,8 +316,9 @@ jobs:
           url="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_number }}"
           result="${{ job.status }}"
           if [ "$result" = "success" ]; then icon="✅"; else icon="❌"; fi
-          msg="secrets macOS 构建${icon}
+          msg="secrets macOS 双架构构建${icon}
           版本：${tag}
+          目标：aarch64-apple-darwin, x86_64-apple-darwin
           提交：${commit}
           作者：${{ github.actor }}
           详情：${url}"
@@ -302,11 +334,14 @@ jobs:
       - name: 安装依赖
         shell: pwsh
         run: |
+          $cargoBin = Join-Path $env:USERPROFILE ".cargo\bin"
           if (-not (Get-Command cargo -ErrorAction SilentlyContinue)) {
             Invoke-WebRequest -Uri "https://win.rustup.rs/x86_64" -OutFile rustup-init.exe
             .\rustup-init.exe -y --default-toolchain stable
             Remove-Item rustup-init.exe
           }
+          $env:Path = "$cargoBin;$env:Path"
+          Add-Content -Path $env:GITHUB_PATH -Value $cargoBin
           rustup target add x86_64-pc-windows-msvc
 
       - uses: actions/checkout@v4
@@ -338,10 +373,15 @@ jobs:
           $bin = "target\x86_64-pc-windows-msvc\release\${{ env.BINARY_NAME }}.exe"
           $archive = "${{ env.BINARY_NAME }}-${tag}-x86_64-windows.zip"
           Compress-Archive -Path $bin -DestinationPath $archive -Force
+          $hash = (Get-FileHash -Algorithm SHA256 $archive).Hash.ToLower()
+          Set-Content -Path "${archive}.sha256" -Value "$hash  $archive" -NoNewline
           $url = "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${{ needs.version.outputs.release_id }}/assets"
           Invoke-RestMethod -Uri $url -Method Post `
             -Headers @{ "Authorization" = "token $env:RELEASE_TOKEN" } `
             -Form @{ attachment = Get-Item $archive }
+          Invoke-RestMethod -Uri $url -Method Post `
+            -Headers @{ "Authorization" = "token $env:RELEASE_TOKEN" } `
+            -Form @{ attachment = Get-Item "${archive}.sha256" }
 
       - name: 飞书通知
         if: always()
@@ -362,7 +402,7 @@ jobs:
 
   publish-release:
     name: 发布草稿 Release
-    needs: [version, build-linux]
+    needs: [version, build-linux, build-macos, build-windows]
     if: always() && needs.version.outputs.release_id != ''
     runs-on: debian
     timeout-minutes: 5
@@ -376,8 +416,11 @@ jobs:
           [ -z "$RELEASE_TOKEN" ] && exit 0
 
           linux_r="${{ needs.build-linux.result }}"
-          if [ "$linux_r" != "success" ]; then
-            echo "Linux 构建未成功 (${linux_r})，保留草稿 Release"
+          macos_r="${{ needs.build-macos.result }}"
+          windows_r="${{ needs.build-windows.result }}"
+          if [ "$linux_r" != "success" ] || [ "$macos_r" != "success" ] || [ "$windows_r" != "success" ]; then
+            echo "存在未成功的构建任务，保留草稿 Release"
+            echo "linux=${linux_r} macos=${macos_r} windows=${windows_r}"
             exit 0
           fi
 
@@ -408,15 +451,16 @@ jobs:
           commit=$(git log -1 --pretty=format:"%s" 2>/dev/null || echo "N/A")
           url="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_number }}"
 
-          check_r="${{ needs.version.result }}"
           linux_r="${{ needs.build-linux.result }}"
+          macos_r="${{ needs.build-macos.result }}"
+          windows_r="${{ needs.build-windows.result }}"
           publish_r="${{ job.status }}"
 
           icon() { case "$1" in success) echo "✅";; skipped) echo "⏭";; *) echo "❌";; esac; }
 
-          if [ "$linux_r" = "success" ] && [ "$publish_r" = "success" ]; then
+          if [ "$linux_r" = "success" ] && [ "$macos_r" = "success" ] && [ "$windows_r" = "success" ] && [ "$publish_r" = "success" ]; then
             status="发布成功 ✅"
-          elif [ "$linux_r" != "success" ]; then
+          elif [ "$linux_r" != "success" ] || [ "$macos_r" != "success" ] || [ "$windows_r" != "success" ]; then
             status="构建失败 ❌"
           else
             status="发布失败 ❌"
@@ -430,7 +474,7 @@ jobs:
 
           msg="secrets ${status}
           ${version_line}
-          linux $(icon "$linux_r") | Release $(icon "$publish_r")
+          linux $(icon "$linux_r") | macOS $(icon "$macos_r") | windows $(icon "$windows_r") | Release $(icon "$publish_r")
           提交：${commit}
           作者：${{ github.actor }}
           详情：${url}"

.vscode/tasks.json

@@ -104,9 +104,9 @@
       "dependsOn": "build"
     },
     {
-      "label": "test: search with secrets revealed",
+      "label": "test: inject service secrets",
       "type": "shell",
-      "command": "./target/debug/secrets search -n refining --kind service --show-secrets",
+      "command": "./target/debug/secrets inject -n refining --kind service --name gitea",
       "dependsOn": "build"
     },
     {
@@ -118,7 +118,7 @@
     {
       "label": "test: add + delete roundtrip",
       "type": "shell",
-      "command": "echo '--- add ---' && ./target/debug/secrets add -n test --kind demo --name roundtrip-test --tag test -m foo=bar -s password=secret123 && echo '--- search ---' && ./target/debug/secrets search -n test --show-secrets && echo '--- delete ---' && ./target/debug/secrets delete -n test --kind demo --name roundtrip-test && echo '--- verify deleted ---' && ./target/debug/secrets search -n test",
+      "command": "echo '--- add ---' && ./target/debug/secrets add -n test --kind demo --name roundtrip-test --tag test -m foo=bar -s password=secret123 && echo '--- search metadata ---' && ./target/debug/secrets search -n test && echo '--- inject secrets ---' && ./target/debug/secrets inject -n test --kind demo --name roundtrip-test && echo '--- delete ---' && ./target/debug/secrets delete -n test --kind demo --name roundtrip-test && echo '--- verify deleted ---' && ./target/debug/secrets search -n test",
       "dependsOn": "build"
     },
     {
@@ -142,7 +142,7 @@
     {
       "label": "test: add with file secret",
       "type": "shell",
-      "command": "echo '--- add key from file ---' && ./target/debug/secrets add -n test --kind key --name test-key --tag test -s content=@./refining/keys/Vultr && echo '--- verify ---' && ./target/debug/secrets search -n test --kind key --show-secrets && echo '--- cleanup ---' && ./target/debug/secrets delete -n test --kind key --name test-key",
+      "command": "echo '--- add key from file ---' && ./target/debug/secrets add -n test --kind key --name test-key --tag test -s content=@./test-fixtures/example-key.pem && echo '--- verify metadata ---' && ./target/debug/secrets search -n test --kind key && echo '--- verify inject ---' && ./target/debug/secrets inject -n test --kind key --name test-key && echo '--- cleanup ---' && ./target/debug/secrets delete -n test --kind key --name test-key",
       "dependsOn": "build"
     }
   ]

AGENTS.md

@@ -1,6 +1,13 @@
 # Secrets CLI — AGENTS.md
 
-跨设备密钥与配置管理 CLI 工具，将 refining / ricnsmart 两个项目的服务器信息、服务凭据存储到 PostgreSQL 18，供 AI 工具读取上下文。
+## 提交 / 发版硬规则（优先于下文其他说明）
+
+1. 涉及 `src/**`、`Cargo.toml`、`Cargo.lock`、CLI 行为变更的提交，默认视为**需要发版**，除非用户明确说明“本次不发版”。
+2. 发版前必须先检查 `Cargo.toml` 中的 `version`，再检查是否已存在对应 tag：`git tag -l 'secrets-*'`。
+3. 若当前版本对应 tag 已存在，必须先 bump `Cargo.toml` 的 `version`，再执行 `cargo build` 同步 `Cargo.lock`，然后才能提交。
+4. 提交前优先运行 `./scripts/release-check.sh`；该脚本会检查重复版本并执行 `cargo fmt -- --check && cargo clippy --locked -- -D warnings && cargo test --locked`。
+
+跨设备密钥与配置管理 CLI 工具，将服务器信息、服务凭据等存储到 PostgreSQL 18，供 AI 工具读取上下文。每个加密字段单独行存储（`secrets` 子表），字段名、类型、长度以明文保存，主密钥由 Argon2id 从主密码派生并存入平台安全存储（macOS Keychain / Windows Credential Manager / Linux keyutils）。
 
 ## 项目结构
 
@@ -10,17 +17,26 @@ secrets/
     main.rs              # CLI 入口，clap 命令定义，auto-migrate，--verbose 全局参数
     output.rs            # OutputMode 枚举 + TTY 检测（TTY→text，非 TTY→json-compact）
     config.rs            # 配置读写：~/.config/secrets/config.toml（database_url）
-    db.rs                # PgPool 创建 + 建表/索引（幂等，含 audit_log）
-    models.rs            # Secret 结构体（sqlx::FromRow + serde）
-    audit.rs             # 审计写入：向 audit_log 表记录所有写操作
+    db.rs                # PgPool 创建 + 建表/索引（DROP+CREATE，含所有表）
+    crypto.rs            # AES-256-GCM 加解密、Argon2id 派生、OS 钥匙串
+    models.rs            # Entry + SecretField 结构体（sqlx::FromRow + serde）
+    audit.rs             # 审计写入：log_tx（事务内）
     commands/
-      add.rs             # add 命令：upsert，支持 --meta key=value / --secret key=@file / -o json
+      init.rs            # init 命令：主密钥初始化（每台设备一次）
+      add.rs             # add 命令：upsert entries + 逐字段写入 secrets，含历史快照
       config.rs          # config 命令：set-db / show / path（持久化 database_url）
-      search.rs          # search 命令：多条件查询，-f/-o/--summary/--limit/--offset/--sort
-      delete.rs          # delete 命令
-      update.rs          # update 命令：增量更新（合并 tags/metadata/encrypted）
+      search.rs          # search 命令：多条件查询，展示 secrets 字段 schema（无需 master_key）
+      delete.rs          # delete 命令：事务化，CASCADE 删除 secrets，含历史快照
+      update.rs          # update 命令：增量更新，secrets 行级 UPSERT/DELETE，CAS 并发保护
+      rollback.rs        # rollback 命令：按 entry_version 恢复 entry + secrets
+      history.rs         # history 命令：查看 entry 变更历史列表
+      run.rs             # inject / run 命令：逐字段解密 + key_ref 引用解析
+      upgrade.rs         # upgrade 命令：检查、校验摘要并下载最新版本，自动替换二进制
+      export_cmd.rs      # export 命令：批量导出记录，支持 JSON/TOML/YAML，含解密明文
+      import_cmd.rs      # import 命令：批量导入记录，冲突检测，dry-run，重新加密写入
   scripts/
-    seed-data.sh         # 从 refining/ricnsmart config.toml 导入全量数据
+    release-check.sh        # 发版前检查版本号/tag 是否重复，并执行 fmt/clippy/test
+    setup-gitea-actions.sh  # 配置 Gitea Actions 变量与 Secrets
   .gitea/workflows/
     secrets.yml          # CI：fmt + clippy + musl 构建 + Release 上传 + 飞书通知
   .vscode/tasks.json     # 本地测试任务（build / config / search / add+delete / update / audit 等）
@@ -31,31 +47,53 @@ secrets/
 - **Host**: `<host>:<port>`
 - **Database**: `secrets`
 - **连接串**: `postgres://postgres:<password>@<host>:<port>/secrets`
-- **表**: `secrets`（主表）+ `audit_log`（审计表），首次连接自动建表（auto-migrate）
+- **表**: `entries`（主表）+ `secrets`（加密字段子表）+ `entries_history` + `secrets_history` + `audit_log` + `kv_config`，首次连接自动建表（auto-migrate）
 
 ### 表结构
 
 ```sql
-secrets (
+entries (
   id          UUID PRIMARY KEY DEFAULT uuidv7(),  -- PG18 时间有序 UUID
   namespace   VARCHAR(64)   NOT NULL,              -- 一级隔离: "refining" | "ricnsmart"
-  kind        VARCHAR(64)   NOT NULL,              -- 类型: "server" | "service"（可扩展）
+  kind        VARCHAR(64)   NOT NULL,              -- 类型: "server" | "service" | "key"（可扩展）
   name        VARCHAR(256)  NOT NULL,              -- 人类可读标识
   tags        TEXT[]        NOT NULL DEFAULT '{}', -- 灵活标签: ["aliyun","hongkong"]
   metadata    JSONB         NOT NULL DEFAULT '{}', -- 明文描述: ip, desc, domains, location...
-  encrypted   JSONB         NOT NULL DEFAULT '{}', -- 敏感数据: ssh_key, password, token...
+  version     BIGINT        NOT NULL DEFAULT 1,    -- 乐观锁版本号，每次写操作自增
   created_at  TIMESTAMPTZ   NOT NULL DEFAULT NOW(),
   updated_at  TIMESTAMPTZ   NOT NULL DEFAULT NOW(),
   UNIQUE(namespace, kind, name)
 )
 ```
 
+```sql
+secrets (
+  id          UUID PRIMARY KEY DEFAULT uuidv7(),
+  entry_id    UUID         NOT NULL REFERENCES entries(id) ON DELETE CASCADE,
+  field_name  VARCHAR(256) NOT NULL,              -- 明文字段名: "username", "token", "ssh_key"
+  field_type  VARCHAR(32)  NOT NULL DEFAULT 'string', -- 明文类型: "string"|"number"|"boolean"|"json"
+  value_len   INT          NOT NULL DEFAULT 0,    -- 明文原始值字符数（PEM≈4096，token≈40）
+  encrypted   BYTEA        NOT NULL DEFAULT '\x', -- 仅加密值本身：nonce(12B)||ciphertext+tag
+  version     BIGINT       NOT NULL DEFAULT 1,
+  created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  updated_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  UNIQUE(entry_id, field_name)
+)
+```
+
+```sql
+kv_config (
+  key   TEXT PRIMARY KEY,   -- 如 'argon2_salt'
+  value BYTEA NOT NULL      -- Argon2id salt，首台设备 init 时生成
+)
+```
+
 ### audit_log 表结构
 
 ```sql
 audit_log (
   id          BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
-  action      VARCHAR(32)   NOT NULL,              -- 'add' | 'update' | 'delete'
+  action      VARCHAR(32)   NOT NULL,              -- 'add' | 'update' | 'delete' | 'rollback'
   namespace   VARCHAR(64)   NOT NULL,
   kind        VARCHAR(64)   NOT NULL,
   name        VARCHAR(256)  NOT NULL,
@@ -65,16 +103,75 @@ audit_log (
 )
 ```
 
+### entries_history 表结构
+
+```sql
+entries_history (
+  id          BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+  entry_id    UUID         NOT NULL,
+  namespace   VARCHAR(64)  NOT NULL,
+  kind        VARCHAR(64)  NOT NULL,
+  name        VARCHAR(256) NOT NULL,
+  version     BIGINT       NOT NULL,   -- 被快照时的版本号
+  action      VARCHAR(16)  NOT NULL,   -- 'add' | 'update' | 'delete' | 'rollback'
+  tags        TEXT[]       NOT NULL DEFAULT '{}',
+  metadata    JSONB        NOT NULL DEFAULT '{}',
+  actor       VARCHAR(128) NOT NULL DEFAULT '',
+  created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+)
+```
+
+### secrets_history 表结构
+
+```sql
+secrets_history (
+  id              BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+  entry_id        UUID         NOT NULL,
+  secret_id       UUID         NOT NULL,  -- 对应 secrets.id
+  entry_version   BIGINT       NOT NULL,  -- 关联 entries_history 的版本号
+  field_name      VARCHAR(256) NOT NULL,
+  field_type      VARCHAR(32)  NOT NULL DEFAULT 'string',
+  value_len       INT          NOT NULL DEFAULT 0,
+  encrypted       BYTEA        NOT NULL DEFAULT '\x',
+  action          VARCHAR(16)  NOT NULL,   -- 'add' | 'update' | 'delete' | 'rollback'
+  actor           VARCHAR(128) NOT NULL DEFAULT '',
+  created_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+)
+```
+
 ### 字段职责划分
 
 | 字段 | 存什么 | 示例 |
 |------|--------|------|
 | `namespace` | 项目/团队隔离 | `refining`, `ricnsmart` |
-| `kind` | 记录类型 | `server`, `service` |
-| `name` | 唯一标识名 | `i-uf63f2uookgs5uxmrdyc`, `gitea` |
+| `kind` | 记录类型 | `server`, `service`, `key` |
+| `name` | 唯一标识名 | `i-example0abcd1234efgh`, `gitea` |
 | `tags` | 多维分类标签 | `["aliyun","hongkong","ricn"]` |
-| `metadata` | 明文非敏感信息 | `{"ip":"47.243.154.187","desc":"Grafana","domains":["..."]}` |
-| `encrypted` | 敏感凭据（MVP 阶段明文存储，后续对 value 加密） | `{"ssh_key":"-----BEGIN...","password":"..."}` |
+| `metadata` | 明文非敏感信息 | `{"ip":"192.0.2.1","desc":"Grafana","key_ref":"my-shared-key"}` |
+| `secrets.field_name` | 加密字段名（明文） | `"username"`, `"token"`, `"ssh_key"` |
+| `secrets.field_type` | 值类型（明文） | `"string"`, `"number"`, `"boolean"`, `"json"` |
+| `secrets.value_len` | 原始值字符数（明文） | `4`（root），`40`（token），`4096`（PEM） |
+| `secrets.encrypted` | 仅加密值本身 | AES-256-GCM 密文 |
+
+### PEM 共享机制（key_ref）
+
+同一 PEM 被多台服务器共享时，将 PEM 存为独立的 `kind=key` 记录，服务器通过 `metadata.key_ref` 引用：
+
+```bash
+# 1. 存共享 PEM
+secrets add -n refining --kind key --name my-shared-key \
+  --tag aliyun --tag hongkong \
+  -s content=@./keys/my-shared-key.pem
+
+# 2. 服务器通过 metadata.key_ref 引用（inject/run 时自动合并 key 的 secrets）
+secrets add -n refining --kind server --name i-example0xyz789 \
+  -m ip=192.0.2.1 -m key_ref=my-shared-key \
+  -s username=ecs-user
+
+# 3. 轮换只需更新 key 记录，所有引用服务器自动生效
+secrets update -n refining --kind key --name my-shared-key \
+  -s content=@./keys/new-key.pem
+```
 
 ## 数据库配置
 
@@ -86,8 +183,25 @@ secrets config show   # 查看当前配置（密码脱敏）
 secrets config path   # 打印配置文件路径
 ```
 
+`set-db` 会先验证连接可用，成功后才写入配置文件；连接失败时提示 "Database connection failed" 且不修改配置。
+
 配置文件：`~/.config/secrets/config.toml`，权限 0600。`--db-url` 参数可一次性覆盖。
 
+## 主密钥与加密
+
+首次使用（每台设备各执行一次）：
+
+```bash
+secrets config set-db "postgres://postgres:<password>@<host>:<port>/secrets"
+secrets init   # 提示输入主密码，Argon2id 派生主密钥后存入 OS 钥匙串
+```
+
+主密码不存储；salt 存于 `kv_config`，首台设备生成后共享，确保同一主密码在所有设备派生出相同主密钥。
+
+主密钥存储后端：macOS Keychain、Windows Credential Manager、Linux keyutils（会话级，重启后需再次 `secrets init`）。
+
+**从旧版（明文 JSONB）升级**：升级后执行 `secrets init` 即可（明文记录需手动重新 add 或通过 update 更新）。
+
 ## CLI 命令
 
 ### AI 使用主路径
@@ -98,26 +212,35 @@ secrets config path   # 打印配置文件路径
 - TTY（终端直接运行）→ 默认 `text`
 - 非 TTY（管道/重定向/AI 调用）→ 自动 `json-compact`
 - 显式 `-o json` → 美化 JSON
-- 显式 `-o env` → KEY=VALUE（可 source）
 
 ---
 
+### init — 主密钥初始化（每台设备一次）
+
+```bash
+# 首次设备：生成 Argon2id salt 并存库，派生主密钥后存 OS 钥匙串
+secrets init
+
+# 后续设备：复用已有 salt，派生主密钥后存钥匙串（主密码需与首台相同）
+secrets init
+```
+
 ### search — 发现与读取
 
 ```bash
 # 参数说明（带典型值）
 #   -n / --namespace   refining | ricnsmart
 #   --kind             server | service
-#   --name             gitea | i-uf63f2uookgs5uxmrdyc | mqtt
+#   --name             gitea | i-example0abcd1234efgh | mqtt
 #   --tag              aliyun | hongkong | production
 #   -q / --query       mqtt | grafana | gitea   （模糊匹配 name/namespace/kind/tags/metadata）
-#   --show-secrets     不带值的 flag，显示 encrypted 字段内容
-#   -f / --field       metadata.ip | metadata.url | secret.token | secret.ssh_key
+#   secrets schema  search 默认展示 secrets 字段名、类型与长度（无需 master_key）
+#   -f / --field       metadata.ip | metadata.url | metadata.default_org
 #   --summary          不带值的 flag，仅返回摘要（name/tags/desc/updated_at）
 #   --limit            20 | 50（默认 50）
 #   --offset           0 | 10 | 20（分页偏移）
 #   --sort             name（默认）| updated | created
-#   -o / --output      text | json | json-compact | env
+#   -o / --output      text | json | json-compact
 
 # 发现概览（起步推荐）
 secrets search --summary --limit 20
@@ -126,21 +249,24 @@ secrets search --sort updated --limit 10 --summary
 
 # 精确定位单条记录
 secrets search -n refining --kind service --name gitea
-secrets search -n refining --kind server --name i-uf63f2uookgs5uxmrdyc
+secrets search -n refining --kind server --name i-example0abcd1234efgh
 
-# 精确定位并获取完整内容（含 secrets）
-secrets search -n refining --kind service --name gitea -o json --show-secrets
+# 精确定位并获取完整内容（secrets 保持加密占位）
+secrets search -n refining --kind service --name gitea -o json
 
-# 直接提取字段值（最短路径，-f secret.* 自动解锁 secrets）
-secrets search -n refining --kind service --name gitea -f secret.token
+# 直接提取 metadata 字段值（最短路径）
 secrets search -n refining --kind service --name gitea -f metadata.url
 secrets search -n refining --kind service --name gitea \
-  -f metadata.url -f metadata.default_org -f secret.token
+  -f metadata.url -f metadata.default_org
+
+# 需要 secrets 时，改用 inject / run
+secrets inject -n refining --kind service --name gitea
+secrets run -n refining --kind service --name gitea -- printenv
 
 # 模糊关键词搜索
 secrets search -q mqtt
 secrets search -q grafana
-secrets search -q 47.117
+secrets search -q 192.0.2
 
 # 按条件过滤
 secrets search -n refining --kind service
@@ -154,11 +280,6 @@ secrets search -n refining --summary --limit 10 --offset 10
 
 # 管道 / AI 调用（非 TTY 自动 json-compact）
 secrets search -n refining --kind service | jq '.[].name'
-secrets search -n refining --kind service --name gitea --show-secrets | jq '.secrets.token'
-
-# 导出为 env 文件（单条记录）
-secrets search -n refining --kind service --name gitea -o env --show-secrets \
-  > ~/.config/gitea/config.env
 ```
 
 ---
@@ -169,27 +290,38 @@ secrets search -n refining --kind service --name gitea -o env --show-secrets \
 # 参数说明（带典型值）
 #   -n / --namespace   refining | ricnsmart
 #   --kind             server | service
-#   --name             gitea | i-uf63f2uookgs5uxmrdyc
+#   --name             gitea | i-example0abcd1234efgh
 #   --tag              aliyun | hongkong（可重复）
-#   -m / --meta        ip=47.117.131.22 | desc="Aliyun ECS" | url=https://...（可重复）
-#   -s / --secret      token=<value> | ssh_key=@./key.pem | password=secret123（可重复）
+#   -m / --meta        ip=10.0.0.1 | desc="ECS" | url=https://... | tls:cert@./cert.pem（可重复）
+#   -s / --secret      token=<value> | ssh_key=@./key.pem | password=secret123 | credentials:content@./key.pem（可重复）
 
 # 添加服务器
-secrets add -n refining --kind server --name i-uf63f2uookgs5uxmrdyc \
+secrets add -n refining --kind server --name i-example0abcd1234efgh \
   --tag aliyun --tag shanghai \
-  -m ip=47.117.131.22 -m desc="Aliyun Shanghai ECS" \
-  -s username=root -s ssh_key=@./keys/voson_shanghai_e.pem
+  -m ip=10.0.0.1 -m desc="Aliyun Shanghai ECS" \
+  -s username=root -s ssh_key=@./keys/deploy-key.pem
 
 # 添加服务凭据
 secrets add -n refining --kind service --name gitea \
   --tag gitea \
-  -m url=https://gitea.refining.dev -m default_org=refining -m username=voson \
+  -m url=https://code.example.com -m default_org=refining -m username=voson \
   -s token=<token> -s runner_token=<runner_token>
 
 # 从文件读取 token
 secrets add -n ricnsmart --kind service --name mqtt \
-  -m host=mqtt.ricnsmart.com -m port=1883 \
+  -m host=mqtt.example.com -m port=1883 \
   -s password=@./mqtt_password.txt
+
+# 多行文件直接写入嵌套 secret 字段
+secrets add -n refining --kind server --name i-example0abcd1234efgh \
+  -s credentials:content@./keys/deploy-key.pem
+
+# 使用类型化值（key:=<json>）存储非字符串类型
+secrets add -n refining --kind service --name prometheus \
+  -m scrape_interval:=15 \
+  -m enabled:=true \
+  -m labels:='["prod","metrics"]' \
+  -s api_key=abc123
 ```
 
 ---
@@ -202,16 +334,16 @@ secrets add -n ricnsmart --kind service --name mqtt \
 # 参数说明（带典型值）
 #   -n / --namespace   refining | ricnsmart
 #   --kind             server | service
-#   --name             gitea | i-uf63f2uookgs5uxmrdyc
+#   --name             gitea | i-example0abcd1234efgh
 #   --add-tag          production | backup（不影响已有 tag，可重复）
 #   --remove-tag       staging | deprecated（可重复）
-#   -m / --meta        ip=10.0.0.1 | desc="新描述"（新增或覆盖，可重复）
-#   --remove-meta      old_port | legacy_key（删除 metadata 字段，可重复）
-#   -s / --secret      token=<new> | ssh_key=@./new.pem（新增或覆盖，可重复）
-#   --remove-secret    old_password | deprecated_key（删除 secret 字段，可重复）
+#   -m / --meta        ip=10.0.0.1 | desc="新描述" | credentials:username=root（新增或覆盖，可重复）
+#   --remove-meta      old_port | legacy_key | credentials:content（删除 metadata 字段，可重复）
+#   -s / --secret      token=<new> | ssh_key=@./new.pem | credentials:content@./new.pem（新增或覆盖，可重复）
+#   --remove-secret    old_password | deprecated_key | credentials:content（删除 secret 字段，可重复）
 
 # 更新单个 metadata 字段
-secrets update -n refining --kind server --name i-uf63f2uookgs5uxmrdyc \
+secrets update -n refining --kind server --name i-example0abcd1234efgh \
   -m ip=10.0.0.1
 
 # 轮换 token
@@ -227,33 +359,233 @@ secrets update -n refining --kind service --name gitea \
 secrets update -n refining --kind service --name mqtt \
   --remove-meta old_port --remove-secret old_password
 
+# 从文件更新嵌套 secret 字段
+secrets update -n refining --kind server --name i-example0abcd1234efgh \
+  -s credentials:content@./keys/deploy-key.pem
+
+# 删除嵌套字段
+secrets update -n refining --kind server --name i-example0abcd1234efgh \
+  --remove-secret credentials:content
+
 # 移除 tag
 secrets update -n refining --kind service --name gitea --remove-tag staging
 ```
 
 ---
 
-### delete — 删除记录
+### delete — 删除记录（支持单条精确删除与批量删除）
+
+删除时会自动将 entry 与所有关联 secret 字段快照到历史表，并写入审计日志，可通过 `rollback` 命令恢复。
 
 ```bash
 # 参数说明（带典型值）
-#   -n / --namespace   refining | ricnsmart
-#   --kind             server | service
-#   --name             gitea | i-uf63f2uookgs5uxmrdyc（必须精确匹配）
+#   -n / --namespace   refining | ricnsmart（必填）
+#   --kind             server | service（指定 --name 时必填；批量时可选）
+#   --name             gitea | i-example0abcd1234efgh（精确匹配；省略则批量删除）
+#   --dry-run          预览将删除的记录，不实际写入（仅批量模式有效）
+#   -o / --output      text | json | json-compact
 
-# 删除服务凭据
+# 精确删除单条记录（--kind 必填）
 secrets delete -n refining --kind service --name legacy-mqtt
-
-# 删除服务器记录
 secrets delete -n ricnsmart --kind server --name i-old-server-id
+
+# 预览批量删除（不写入数据库）
+secrets delete -n refining --dry-run
+secrets delete -n ricnsmart --kind server --dry-run
+
+# 批量删除整个 namespace 的所有记录
+secrets delete -n ricnsmart
+
+# 批量删除 namespace 下指定 kind 的所有记录
+secrets delete -n ricnsmart --kind server
+
+# JSON 输出
+secrets delete -n refining --kind service -o json
 ```
 
 ---
 
-### config — 配置管理
+### history — 查看变更历史
 
 ```bash
-# 设置数据库连接（每台设备执行一次，之后永久生效）
+# 参数说明
+#   -n / --namespace   refining | ricnsmart
+#   --kind             server | service
+#   --name             记录名
+#   --limit            返回条数（默认 20）
+
+# 查看某条记录的历史版本列表
+secrets history -n refining --kind service --name gitea
+
+# 查最近 5 条
+secrets history -n refining --kind service --name gitea --limit 5
+
+# JSON 输出
+secrets history -n refining --kind service --name gitea -o json
+```
+
+---
+
+### rollback — 回滚到指定版本
+
+```bash
+# 参数说明
+#   -n / --namespace     refining | ricnsmart
+#   --kind               server | service
+#   --name               记录名
+#   --to-version <N>     目标版本号（省略则恢复最近一次快照）
+
+# 撤销上次修改（回滚到最近一次快照）
+secrets rollback -n refining --kind service --name gitea
+
+# 回滚到版本 3
+secrets rollback -n refining --kind service --name gitea --to-version 3
+```
+
+---
+
+### inject — 输出临时环境变量
+
+敏感值仅打印到 stdout，不持久化、不写入当前 shell。
+
+```bash
+# 参数说明
+#   -n / --namespace   refining | ricnsmart
+#   --kind             server | service
+#   --name             记录名
+#   --tag              按 tag 过滤（可重复）
+#   --prefix           变量名前缀（留空则以记录 name 作前缀）
+#   -o / --output      text（默认 KEY=VALUE）| json | json-compact
+
+# 打印单条记录的所有变量（KEY=VALUE 格式）
+secrets inject -n refining --kind service --name gitea
+
+# 自定义前缀
+secrets inject -n refining --kind service --name gitea --prefix GITEA
+
+# JSON 格式（适合管道或脚本解析）
+secrets inject -n refining --kind service --name gitea -o json
+
+# eval 注入当前 shell（谨慎使用）
+eval $(secrets inject -n refining --kind service --name gitea)
+```
+
+---
+
+### run — 向子进程注入 secrets 并执行命令
+
+secrets 仅作用于子进程环境，不修改当前 shell，进程退出码透传。
+
+```bash
+# 参数说明
+#   -n / --namespace   refining | ricnsmart
+#   --kind             server | service
+#   --name             记录名
+#   --tag              按 tag 过滤（可重复）
+#   --prefix           变量名前缀
+#   -- <command>       执行的命令及参数
+
+# 向脚本注入单条记录的 secrets
+secrets run -n refining --kind service --name gitea -- ./deploy.sh
+
+# 按 tag 批量注入（多条记录合并）
+secrets run --tag production -- env | grep -i token
+
+# 验证注入了哪些变量
+secrets run -n refining --kind service --name gitea -- printenv
+```
+
+---
+
+### upgrade — 自动更新 CLI 二进制
+
+从 Release 服务器下载最新版本，校验对应 `.sha256` 摘要后替换当前二进制，无需数据库连接或主密钥。
+
+**配置方式**：`SECRETS_UPGRADE_URL` 必填。优先用**构建时**：`SECRETS_UPGRADE_URL=https://... cargo build`，CI 已自动注入。或**运行时**：写在 `.env` 或 `export` 后执行。
+
+```bash
+# 检查是否有新版本（不下载）
+secrets upgrade --check
+
+# 下载、校验 SHA-256 并安装最新版本
+secrets upgrade
+```
+
+---
+
+### export — 批量导出记录
+
+将匹配的记录（含解密后的明文 secrets）导出到文件或 stdout。支持 JSON、TOML、YAML 三种格式，文件格式由扩展名自动推断。使用 `--no-secrets` 时无需主密钥。
+
+```bash
+# 参数说明
+# -n / --namespace refining | ricnsmart
+# --kind server | service
+# --name gitea | i-example0abcd1234efgh
+# --tag aliyun | production（可重复）
+# -q / --query 模糊关键词
+# --file <path>   输出文件路径，格式由扩展名推断（.json / .toml / .yaml / .yml）
+# --format json | toml | yaml   显式指定格式（输出到 stdout 时必须指定）
+# --no-secrets    不导出 secrets，无需主密钥
+
+# 全量导出到 JSON 文件
+secrets export --file backup.json
+
+# 按 namespace 导出为 TOML
+secrets export -n refining --file refining.toml
+
+# 按 kind 导出为 YAML
+secrets export -n refining --kind service --file services.yaml
+
+# 按 tag 过滤导出
+secrets export --tag production --file prod.json
+
+# 模糊关键词导出
+secrets export -q mqtt --file mqtt.json
+
+# 仅导出 schema（不含 secrets，无需主密钥）
+secrets export --no-secrets --file schema.json
+
+# 输出到 stdout（必须指定 --format）
+secrets export -n refining --format yaml
+secrets export --format json | jq '.'
+```
+
+---
+
+### import — 批量导入记录
+
+从导出文件读取记录并写入数据库，自动重新加密 secrets。支持 JSON、TOML、YAML 三种格式，文件格式由扩展名自动推断。
+
+```bash
+# 参数说明
+# <file>        必选，输入文件路径（格式由扩展名推断）
+# --force       冲突时覆盖已有记录（默认：报错并停止）
+# --dry-run     预览将执行的操作，不写入数据库
+# -o / --output text | json | json-compact
+
+# 导入 JSON 文件（遇到已存在记录报错）
+secrets import backup.json
+
+# 导入 TOML 文件，冲突时覆盖
+secrets import --force refining.toml
+
+# 导入 YAML 文件，冲突时覆盖
+secrets import --force services.yaml
+
+# 预览将执行的操作（不写入）
+secrets import --dry-run backup.json
+
+# JSON 格式输出导入摘要
+secrets import backup.json -o json
+```
+
+---
+
+### config — 配置管理（无需主密钥）
+
+```bash
+# 设置数据库连接（每台设备执行一次，之后永久生效；先验证连接可用再写入）
 secrets config set-db "postgres://postgres:<password>@<host>:<port>/secrets"
 
 # 查看当前配置（密码脱敏）
@@ -288,16 +620,25 @@ secrets --db-url "postgres://..." search -n refining
 - 新增 `kind` 类型时：只需在 `add` 调用时传入，无需改代码
 - 字段命名：CLI 短标志 `-n`=namespace，`-m`=meta，`-s`=secret，`-q`=query，`-v`=verbose，`-f`=field，`-o`=output
 - 日志：用户可见输出用 `println!`；调试/运维信息用 `tracing::debug!`/`info!`/`warn!`/`error!`
-- 审计：`add`/`update`/`delete` 成功后调用 `audit::log()`，写入 `audit_log` 表；失败只 warn 不中断
+- 审计：`add`/`update`/`delete` 成功后调用 `audit::log_tx`，写入 `audit_log` 表；失败只 warn 不中断
+- 加密：`encrypted` 列存储 AES-256-GCM 密文；`add`/`update`/`search`/`delete` 需主密钥（`secrets init` 后从 OS 钥匙串加载）
 - 输出：读命令通过 `OutputMode` 支持 text/json/json-compact/env；写命令 `add` 同样支持 `-o json`
 
 ## 提交前检查（必须全部通过）
 
 每次提交代码前，请在本地依次执行以下检查，**全部通过后再 push**：
 
+优先使用：
+
+```bash
+./scripts/release-check.sh
+```
+
+它等价于先检查版本号 / tag，再执行下面的格式、Lint、测试。
+
 ### 1. 版本号（按需）
 
-若本次改动需要发版，请先确认 `Cargo.toml` 中的 `version` 已提升，避免 CI 打出的 Tag 与已有版本重复。可通过 git tag 判断：
+若本次改动需要发版，请先确认 `Cargo.toml` 中的 `version` 已提升，避免 CI 打出的 Tag 与已有版本重复。**升级版本后需同时更新 `Cargo.lock`**（运行 `cargo build` 即可自动同步），否则 CI 中 `cargo clippy --locked` 会因 lock 与 manifest 不一致而失败。可通过 git tag 判断：
 
 ```bash
 # 查看当前 Cargo.toml 版本
@@ -307,7 +648,7 @@ grep '^version' Cargo.toml
 git tag -l 'secrets-*'
 ```
 
-若当前版本已被 tag（例如已有 `secrets-0.3.0` 且 `Cargo.toml` 仍为 `0.3.0`），则应在 `Cargo.toml` 中 bump 版本号后再提交，以便 CI 自动打新 Tag 并发布 Release。
+若当前版本已被 tag（例如已有 `secrets-0.3.0` 且 `Cargo.toml` 仍为 `0.3.0`），则应在 `Cargo.toml` 中 bump 版本号，再执行 `cargo build` 同步 `Cargo.lock`，最后一并提交，以便 CI 自动打新 Tag 并发布 Release。
 
 ### 2. 格式、Lint、测试
 
@@ -325,12 +666,14 @@ cargo fmt -- --check && cargo clippy -- -D warnings && cargo test
 
 ## CI/CD
 
-- Gitea Actions（runner: debian）
+- Gitea Actions（runners: debian / darwin-arm64 / windows）
 - 触发：`src/**`、`Cargo.toml`、`Cargo.lock` 变更推送到 main
-- 构建目标：`x86_64-unknown-linux-musl`（静态链接，无 glibc 依赖）
-- 新版本自动打 Tag（格式 `secrets-<version>`）并上传二进制到 Gitea Release
+- 构建目标：`x86_64-unknown-linux-musl`、`aarch64-apple-darwin`、`x86_64-apple-darwin`（由 ARM mac runner 交叉编译）、`x86_64-pc-windows-msvc`
+- 新版本自动打 Tag（格式 `secrets-<version>`）并上传二进制与对应 `.sha256` 摘要到 Gitea Release
+- Release 仅在 Linux/macOS/Windows 构建全部成功后才会从 draft 发布
 - 通知：飞书 Webhook（`vars.WEBHOOK_URL`）
 - 所需 secrets/vars：`RELEASE_TOKEN`（Release 上传，Gitea PAT）、`vars.WEBHOOK_URL`（通知，可选）
+- **注意**：Gitea Actions 的 Secret/Variable 创建时，`data`/`value` 字段需传入**原始值**，不要使用 base64 编码
 
 ## 环境变量
 
@@ -338,5 +681,6 @@ cargo fmt -- --check && cargo clippy -- -D warnings && cargo test
 |------|------|
 | `RUST_LOG` | 日志级别，如 `secrets=debug`、`secrets=trace`（默认 warn） |
 | `USER` | 审计日志 actor 字段来源，Shell 自动设置，通常无需手动配置 |
+| `SECRETS_UPGRADE_URL` | upgrade 的 Release API 地址。构建时（cargo build）或运行时（.env/export） |
 
 数据库连接通过 `secrets config set-db` 持久化到 `~/.config/secrets/config.toml`，不支持环境变量。

Cargo.toml

@@ -1,18 +1,33 @@
 [package]
 name = "secrets"
-version = "0.4.0"
+version = "0.9.3"
 edition = "2024"
 
 [dependencies]
-anyhow = "1.0.102"
-chrono = { version = "0.4.44", features = ["serde"] }
-clap = { version = "4.6.0", features = ["derive", "env"] }
-dirs = "6.0.0"
-serde = { version = "1.0.228", features = ["derive"] }
-serde_json = "1.0.149"
-sqlx = { version = "0.8.6", features = ["runtime-tokio", "tls-rustls", "postgres", "uuid", "json", "chrono"] }
-tokio = { version = "1.50.0", features = ["full"] }
-toml = "1.0.7"
-tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-uuid = { version = "1.22.0", features = ["serde", "v4"] }
+aes-gcm = "^0.10.3"
+anyhow = "^1.0.102"
+argon2 = { version = "^0.5.3", features = ["std"] }
+chrono = { version = "^0.4.44", features = ["serde"] }
+clap = { version = "^4.6.0", features = ["derive"] }
+dirs = "^6.0.0"
+dotenvy = "^0.15"
+flate2 = "^1.1.9"
+keyring = { version = "^3.6.3", features = ["apple-native", "windows-native", "linux-native"] }
+rand = "^0.10.0"
+reqwest = { version = "^0.12", default-features = false, features = ["rustls-tls", "json"] }
+rpassword = "^7.4.0"
+self-replace = "^1.5.0"
+semver = "^1.0.27"
+serde = { version = "^1.0.228", features = ["derive"] }
+serde_json = "^1.0.149"
+serde_yaml = "^0.9"
+sha2 = "^0.10.9"
+sqlx = { version = "^0.8.6", features = ["runtime-tokio", "tls-rustls", "postgres", "uuid", "json", "chrono"] }
+tar = "^0.4.44"
+tempfile = "^3.19"
+tokio = { version = "^1.50.0", features = ["rt-multi-thread", "macros", "fs", "io-util", "process", "signal"] }
+toml = "^1.0.7"
+tracing = "^0.1"
+tracing-subscriber = { version = "^0.3", features = ["env-filter"] }
+uuid = { version = "^1.22.0", features = ["serde"] }
+zip = { version = "^8.2.0", default-features = false, features = ["deflate"] }

README.md

@@ -2,7 +2,7 @@
 
 跨设备密钥与配置管理 CLI，基于 Rust + PostgreSQL 18。
 
-将服务器信息、服务凭据统一存入数据库，供本地工具和 AI 读取上下文。
+将服务器信息、服务凭据统一存入数据库，供本地工具和 AI 读取上下文。每个敏感字段单独行存储（`secrets` 子表），字段名、类型、长度以明文保存便于 AI 理解，仅值本身使用 AES-256-GCM 加密；主密钥由 Argon2id 从主密码派生并存入系统钥匙串。
 
 ## 安装
 
@@ -11,12 +11,24 @@ cargo build --release
 # 或从 Release 页面下载预编译二进制
 ```
 
-配置数据库连接（首次使用需执行一次，之后在该设备上持久生效）：
+已有旧版本时，可执行 `secrets upgrade` 自动下载最新版并替换。该命令会校验 Release 附带的 `.sha256` 摘要后再安装。
+
+## 首次使用（每台设备各执行一次）
 
 ```bash
+# 1. 配置数据库连接（会先验证连接可用再写入）
 secrets config set-db "postgres://postgres:<password>@<host>:<port>/secrets"
+
+# 2. 初始化主密钥（提示输入至少 8 位的主密码，派生后存入 OS 钥匙串）
+secrets init
 ```
 
+主密码不会存储，仅用于派生主密钥，且至少需 8 位。同一主密码在所有设备上会得到相同主密钥（salt 存于数据库，首台设备生成后共享）。
+
+**主密钥存储**：macOS → Keychain；Windows → Credential Manager；Linux → keyutils（会话级，重启后需再次 `secrets init`）。
+
+**从旧版（明文存储）升级**：升级后首次运行需执行 `secrets init` 即可（明文记录需手动重新 add 或通过 update 更新）。
+
 ## AI Agent 快速指南
 
 这个 CLI 以 AI 使用优先设计。核心路径只有一条：**读取用 `search`，写入用 `add` / `update`**。
@@ -42,37 +54,41 @@ secrets search --sort updated --limit 10 --summary
 # 精确定位（namespace + kind + name 三元组）
 secrets search -n refining --kind service --name gitea
 
-# 获取完整记录含 secrets（JSON 格式，AI 最易解析）
-secrets search -n refining --kind service --name gitea -o json --show-secrets
+# 获取完整记录（含 secrets 字段 schema：field_name、field_type、value_len，无需 master_key）
+secrets search -n refining --kind service --name gitea -o json
 
-# 直接提取单个字段值（最短路径）
-secrets search -n refining --kind service --name gitea -f secret.token
+# 直接提取单个 metadata 字段值（最短路径）
 secrets search -n refining --kind service --name gitea -f metadata.url
 
-# 同时提取多个字段
+# 同时提取多个 metadata 字段
 secrets search -n refining --kind service --name gitea \
-  -f metadata.url -f metadata.default_org -f secret.token
+  -f metadata.url -f metadata.default_org
+
+# 需要 secrets 时，改用 inject / run
+secrets inject -n refining --kind service --name gitea
+secrets run -n refining --kind service --name gitea -- printenv
 ```
 
-`-f secret.*` 会自动解锁 secrets，无需额外加 `--show-secrets`。
+`search` 展示 metadata 与 secrets 的字段 schema（字段名、类型、长度），不展示 secret 值本身；需要值时用 `inject` / `run`。
 
 ### 输出格式
 
 | 场景 | 推荐命令 |
 |------|----------|
 | AI 解析 / 管道处理 | `-o json` 或 `-o json-compact` |
-| 写入 `.env` 文件 | `-o env --show-secrets` |
+| 注入 secrets 到环境变量 | `inject` / `run` |
 | 人类查看 | 默认 `text`（TTY 下自动启用） |
 | 非 TTY（管道/重定向） | 自动 `json-compact` |
 
+说明：`text` 输出中的时间会按当前机器本地时区显示；`json/json-compact` 继续使用 UTC（RFC3339 风格）以便脚本和 AI 稳定解析。
+
 ```bash
 # 管道直接 jq 解析（非 TTY 自动 json-compact）
 secrets search -n refining --kind service | jq '.[].name'
-secrets search -n refining --kind service --name gitea --show-secrets | jq '.secrets.token'
 
-# 导出为可 source 的 env 文件（单条记录）
-secrets search -n refining --kind service --name gitea -o env --show-secrets \
-  > ~/.config/gitea/config.env
+# 需要 secrets 时，使用 inject / run
+secrets inject -n refining --kind service --name gitea > ~/.config/gitea/secrets.env
+secrets run -n refining --kind service --name gitea -- ./deploy.sh
 ```
 
 ## 完整命令参考
@@ -80,11 +96,15 @@ secrets search -n refining --kind service --name gitea -o env --show-secrets \
 ```bash
 # 查看帮助（包含各子命令 EXAMPLES）
 secrets --help
+secrets init --help           # 主密钥初始化
 secrets search --help
 secrets add --help
 secrets update --help
 secrets delete --help
 secrets config --help
+secrets upgrade --help     # 检查并更新 CLI 版本
+secrets export --help      # 批量导出（JSON/TOML/YAML）
+secrets import --help      # 批量导入（JSON/TOML/YAML）
 
 # ── search ──────────────────────────────────────────────────────────────────
 secrets search --summary --limit 20                        # 发现概览
@@ -92,35 +112,71 @@ secrets search -n refining --kind service                  # 按 namespace + kin
 secrets search -n refining --kind service --name gitea     # 精确查找
 secrets search -q mqtt                                     # 关键词模糊搜索
 secrets search --tag hongkong                              # 按 tag 过滤
-secrets search -n refining --kind service --name gitea -f secret.token   # 提取字段
-secrets search -n refining --kind service --name gitea -o json --show-secrets  # 完整 JSON
+secrets search -n refining --kind service --name gitea -f metadata.url   # 提取 metadata 字段
+secrets search -n refining --kind service --name gitea -o json            # 完整记录（含 secrets schema）
 secrets search --sort updated --limit 10 --summary         # 最近改动
 secrets search -n refining --summary --limit 10 --offset 10  # 翻页
 
 # ── add ──────────────────────────────────────────────────────────────────────
 secrets add -n refining --kind server --name my-server \
   --tag aliyun --tag shanghai \
-  -m ip=47.117.131.22 -m desc="Aliyun Shanghai ECS" \
+  -m ip=10.0.0.1 -m desc="Example ECS" \
   -s username=root -s ssh_key=@./keys/server.pem
 
+# 多行文件直接写入嵌套 secret 字段
+secrets add -n refining --kind server --name my-server \
+  -s credentials:content@./keys/server.pem
+
+# 使用 typed JSON 写入 secret（布尔、数字、数组、对象）
+secrets add -n refining --kind service --name deploy-bot \
+  -s enabled:=true \
+  -s retry_count:=3 \
+  -s scopes:='["repo","workflow"]' \
+  -s extra:='{"region":"ap-east-1","verify_tls":true}'
+
 secrets add -n refining --kind service --name gitea \
   --tag gitea \
-  -m url=https://gitea.refining.dev -m default_org=refining \
+  -m url=https://code.example.com -m default_org=myorg \
   -s token=<token>
 
 # ── update ───────────────────────────────────────────────────────────────────
 secrets update -n refining --kind server --name my-server -m ip=10.0.0.1
 secrets update -n refining --kind service --name gitea --add-tag production -s token=<new>
 secrets update -n refining --kind service --name mqtt --remove-meta old_port --remove-secret old_key
+secrets update -n refining --kind server --name my-server --remove-secret credentials:content
 
 # ── delete ───────────────────────────────────────────────────────────────────
-secrets delete -n refining --kind service --name legacy-mqtt
+secrets delete -n refining --kind service --name legacy-mqtt   # 精确删除单条（--kind 必填）
+secrets delete -n refining --dry-run                          # 预览批量删除（不写入）
+secrets delete -n ricnsmart                                    # 批量删除整个 namespace
+secrets delete -n ricnsmart --kind server                      # 批量删除指定 kind
+
+# ── init ─────────────────────────────────────────────────────────────────────
+secrets init              # 主密钥初始化（每台设备一次，主密码至少 8 位，派生后存钥匙串）
 
 # ── config ───────────────────────────────────────────────────────────────────
-secrets config set-db "postgres://postgres:<password>@<host>:<port>/secrets"
+secrets config set-db "postgres://postgres:<password>@<host>:<port>/secrets"   # 先验证再写入
 secrets config show    # 密码脱敏展示
 secrets config path    # 打印配置文件路径
 
+# ── upgrade ──────────────────────────────────────────────────────────────────
+secrets upgrade --check   # 仅检查是否有新版本
+secrets upgrade           # 下载、校验 SHA-256 并安装最新版（可通过 SECRETS_UPGRADE_URL 自托管）
+
+# ── export ────────────────────────────────────────────────────────────────────
+secrets export --file backup.json                        # 全量导出到 JSON
+secrets export -n refining --file refining.toml          # 按 namespace 导出为 TOML
+secrets export -n refining --kind service --file svc.yaml   # 按 kind 导出为 YAML
+secrets export --tag production --file prod.json         # 按 tag 过滤
+secrets export -q mqtt --file mqtt.json                   # 模糊搜索导出
+secrets export --no-secrets --file schema.json           # 仅导出 schema（无需主密钥）
+secrets export -n refining --format yaml                  # 输出到 stdout，指定格式
+
+# ── import ────────────────────────────────────────────────────────────────────
+secrets import backup.json                               # 导入（冲突时报错）
+secrets import --force refining.toml                     # 冲突时覆盖已有记录
+secrets import --dry-run backup.yaml                     # 预览将要执行的操作（不写入）
+
 # ── 调试 ──────────────────────────────────────────────────────────────────────
 secrets --verbose search -q mqtt
 RUST_LOG=secrets=trace secrets search
@@ -128,18 +184,104 @@ RUST_LOG=secrets=trace secrets search
 
 ## 数据模型
 
-单张 `secrets` 表，首次连接自动建表；同时自动创建 `audit_log` 表，记录所有写操作。
+主表 `entries`（namespace、kind、name、tags、metadata）+ 子表 `secrets`（每个加密字段一行，含 field_name、field_type、value_len、encrypted）。首次连接自动建表；同时创建 `audit_log`、`entries_history`、`secrets_history` 等表。
 
-| 字段 | 说明 |
-|------|------|
-| `namespace` | 一级隔离，如 `refining`、`ricnsmart` |
-| `kind` | 记录类型，如 `server`、`service`（可自由扩展） |
-| `name` | 人类可读唯一标识 |
-| `tags` | 多维标签，如 `["aliyun","hongkong"]` |
-| `metadata` | 明文描述信息（ip、desc、domains 等） |
-| `encrypted` | 敏感凭据（ssh_key、password、token 等），MVP 阶段明文存储，预留加密字段 |
+| 位置 | 字段 | 说明 |
+|------|------|------|
+| entries | namespace | 一级隔离，如 `refining`、`ricnsmart` |
+| entries | kind | 记录类型，如 `server`、`service`、`key`（可自由扩展） |
+| entries | name | 人类可读唯一标识 |
+| entries | tags | 多维标签，如 `["aliyun","hongkong"]` |
+| entries | metadata | 明文描述（ip、desc、domains、key_ref 等） |
+| secrets | field_name / field_type / value_len | 明文，search 可见，AI 可推断 inject 会生成什么变量 |
+| secrets | encrypted | 仅加密值本身，AES-256-GCM |
 
-`-m` / `--meta` 写入 `metadata`，`-s` / `--secret` 写入 `encrypted`，`value=@file` 从文件读取内容。
+`-m` / `--meta` 写入 `metadata`，`-s` / `--secret` 写入 `secrets` 表的独立行。支持 `key=value`、`key=@file`、`key:=<json>`，也支持 `credentials:content@./key.pem` 这类嵌套字段文件写入；删除时支持 `--remove-secret credentials:content`。加解密使用主密钥（由 `secrets init` 设置）。
+
+**PEM 共享**：同一 PEM 被多台服务器共享时，可存为 `kind=key` 记录，服务器通过 `metadata.key_ref` 引用；轮换只需 update 一条 key 记录，所有引用自动生效。详见 [AGENTS.md](AGENTS.md)。
+
+### `-m` / `--meta` JSON 语法速查
+
+`-m` 和 `-s` 走的是同一套解析规则，只是写入位置不同：`-m` 写到明文 `metadata`，适合端口、开关、标签、描述性配置等非敏感信息。
+
+| 目标值 | 写法示例 | 实际存入 |
+|------|------|------|
+| 普通字符串 | `-m url=https://code.example.com` | `"https://code.example.com"` |
+| 文件内容字符串 | `-m notes=@./service-notes.txt` | `"..."` |
+| 布尔值 | `-m enabled:=true` | `true` |
+| 数字 | `-m port:=3000` | `3000` |
+| `null` | `-m deprecated_at:=null` | `null` |
+| 数组 | `-m domains:='["code.example.com","git.example.com"]'` | `["code.example.com","git.example.com"]` |
+| 对象 | `-m tls:='{"enabled":true,"redirect_http":true}'` | `{"enabled":true,"redirect_http":true}` |
+| 嵌套路径 + JSON | `-m deploy:strategy:='{"type":"rolling","batch":2}'` | `{"deploy":{"strategy":{"type":"rolling","batch":2}}}` |
+
+常见规则：
+
+- `=` 表示按字符串存储。
+- `:=` 表示按 JSON 解析。
+- shell 中数组和对象建议整体用单引号包住。
+- 嵌套字段继续用冒号分隔：`-m runtime:max_open_conns:=20`。
+
+示例：新增一条带 typed metadata 的记录
+
+```bash
+secrets add -n refining --kind service --name gitea \
+  -m url=https://code.example.com \
+  -m port:=3000 \
+  -m enabled:=true \
+  -m domains:='["code.example.com","git.example.com"]' \
+  -m tls:='{"enabled":true,"redirect_http":true}'
+```
+
+示例：更新已有记录中的嵌套 metadata
+
+```bash
+secrets update -n refining --kind service --name gitea \
+  -m deploy:strategy:='{"type":"rolling","batch":2}' \
+  -m runtime:max_open_conns:=20
+```
+
+### `-s` / `--secret` JSON 语法速查
+
+当你希望写入的不是普通字符串，而是 `true`、`123`、`null`、数组或对象时，用 `:=`，右侧按 JSON 解析。
+
+| 目标值 | 写法示例 | 实际存入 |
+|------|------|------|
+| 普通字符串 | `-s token=abc123` | `"abc123"` |
+| 文件内容字符串 | `-s ssh_key=@./id_ed25519` | `"-----BEGIN ..."` |
+| 布尔值 | `-s enabled:=true` | `true` |
+| 数字 | `-s retry_count:=3` | `3` |
+| `null` | `-s deprecated_at:=null` | `null` |
+| 数组 | `-s scopes:='["repo","workflow"]'` | `["repo","workflow"]` |
+| 对象 | `-s extra:='{"region":"ap-east-1","verify_tls":true}'` | `{"region":"ap-east-1","verify_tls":true}` |
+| 嵌套路径 + JSON | `-s auth:policy:='{"mfa":true,"ttl":3600}'` | `{"auth":{"policy":{"mfa":true,"ttl":3600}}}` |
+
+常见规则：
+
+- `=` 表示按字符串存储，不做 JSON 解析。
+- `:=` 表示按 JSON 解析，适合布尔、数字、数组、对象、`null`。
+- shell 里对象和数组通常要整体加引号，推荐单引号：`-s flags:='["a","b"]'`。
+- 嵌套字段继续用冒号分隔：`-s credentials:enabled:=true`。
+- 如果你就是想存一个“JSON 字符串字面量”，可以写成 `-s note:='"hello"'`，但大多数字符串场景直接用 `=` 更直观。
+
+示例：新增一条同时包含字符串、文件、布尔、数组、对象的记录
+
+```bash
+secrets add -n refining --kind service --name deploy-bot \
+  -s token=abc123 \
+  -s ssh_key=@./keys/deploy-bot.pem \
+  -s enabled:=true \
+  -s scopes:='["repo","workflow"]' \
+  -s policy:='{"ttl":3600,"mfa":true}'
+```
+
+示例：更新已有记录中的嵌套 JSON 字段
+
+```bash
+secrets update -n refining --kind service --name deploy-bot \
+  -s auth:config:='{"issuer":"gitea","rotate":true}' \
+  -s auth:retry:=5
+```
 
 ## 审计日志
 
@@ -160,22 +302,29 @@ src/
   main.rs          # CLI 入口（clap），含各子命令 after_help 示例
   output.rs        # OutputMode 枚举 + TTY 检测
   config.rs        # 配置读写（~/.config/secrets/config.toml）
-  db.rs            # 连接池 + auto-migrate（secrets + audit_log）
-  models.rs        # Secret 结构体
+  db.rs            # 连接池 + auto-migrate（entries + secrets + entries_history + secrets_history + audit_log + kv_config）
+  crypto.rs        # AES-256-GCM 加解密、Argon2id 派生、OS 钥匙串
+  models.rs        # Entry + SecretField 结构体
   audit.rs         # 审计日志写入（audit_log 表）
   commands/
-    add.rs         # upsert，支持 -o json
+    init.rs        # 主密钥初始化（首次/新设备）
+    add.rs         # upsert entries + secrets 行，支持 -o json
     config.rs      # config set-db/show/path
-    search.rs      # 多条件查询，支持 -f/-o/--summary/--limit/--offset/--sort
-    delete.rs      # 删除
-    update.rs      # 增量更新（合并 tags/metadata/encrypted）
+    search.rs      # 多条件查询，展示 secrets schema（-f/-o/--summary/--limit/--offset/--sort）
+    delete.rs      # 删除（CASCADE 删除 secrets）
+    update.rs      # 增量更新（tags/metadata + secrets 行级 UPSERT/DELETE）
+    rollback.rs    # rollback / history：按 entry_version 恢复
+    run.rs         # inject / run，逐字段解密 + key_ref 引用解析
+    upgrade.rs     # 从 Gitea Release 自更新
+    export_cmd.rs  # export：批量导出，支持 JSON/TOML/YAML，含解密明文
+    import_cmd.rs  # import：批量导入，冲突检测，dry-run，重新加密写入
 scripts/
-  seed-data.sh     # 导入 refining / ricnsmart 全量数据
+  setup-gitea-actions.sh  # 配置 Gitea Actions 变量与 Secrets
 ```
 
 ## CI/CD（Gitea Actions）
 
-推送 `main` 分支时自动：fmt/clippy 检查 → musl 构建 → 创建 Release 并上传二进制。
+推送 `main` 分支时自动：fmt/clippy/test 检查 → Linux/macOS/Windows 构建 → 上传二进制与 `.sha256` 摘要 → 所有平台成功后发布 Release。
 
 **首次使用需配置 Actions 变量和 Secrets：**
 
@@ -186,5 +335,12 @@ scripts/
 
 - `RELEASE_TOKEN`（Secret）：Gitea PAT，用于创建 Release 上传二进制
 - `WEBHOOK_URL`（Variable）：飞书通知，可选
+- **注意**：Secret/Variable 的 `data`/`value` 字段需传入原始值，不要 base64 编码
+
+当前 Release 预编译产物覆盖：
+- Linux `x86_64-unknown-linux-musl`
+- macOS Apple Silicon `aarch64-apple-darwin`
+- macOS Intel `x86_64-apple-darwin`（由 ARM mac runner 交叉编译）
+- Windows `x86_64-pc-windows-msvc`
 
 详见 [AGENTS.md](AGENTS.md)。

scripts/release-check.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$repo_root"
+
+version="$(grep -m1 '^version' Cargo.toml | sed 's/.*"\(.*\)".*/\1/')"
+tag="secrets-${version}"
+
+echo "==> 当前版本: ${version}"
+echo "==> 检查是否已存在 tag: ${tag}"
+
+if git rev-parse "refs/tags/${tag}" >/dev/null 2>&1; then
+  echo "错误: 已存在 tag ${tag}"
+  echo "请先 bump Cargo.toml 中的 version，再执行 cargo build 同步 Cargo.lock。"
+  exit 1
+fi
+
+echo "==> 未发现重复 tag，开始执行检查"
+cargo fmt -- --check
+cargo clippy --locked -- -D warnings
+cargo test --locked

scripts/setup-gitea-actions.sh

@@ -7,7 +7,9 @@
 #   - secrets.RELEASE_TOKEN  (必选) Release 上传用，值为 Gitea PAT
 #   - vars.WEBHOOK_URL       (可选) 飞书通知
 #
-# 注意: Gitea 不允许 secret/variable 名以 GITEA_ 或 GITHUB_ 开头，故使用 RELEASE_TOKEN
+# 注意:
+#   - Gitea 不允许 secret/variable 名以 GITEA_ 或 GITHUB_ 开头，故使用 RELEASE_TOKEN
+#   - Secret/Variable 的 data/value 字段需传入原始值，不要使用 base64 编码
 #
 # 用法:
 #   1. 从 ~/.config/gitea/config.env 读取 GITEA_URL, GITEA_TOKEN, GITEA_WEBHOOK_URL
@@ -108,11 +110,13 @@ echo "━━━━━━━━━━━━━━━━━━━━━━━━
 echo ""
 
 # 1. 创建 Secret: RELEASE_TOKEN
+# 注意: Gitea Actions API 的 data 字段需传入原始值，不要使用 base64 编码
 echo "1. 创建 Secret: RELEASE_TOKEN"
+secret_payload=$(jq -n --arg t "$GITEA_TOKEN" '{data: $t}')
 resp=$(curl -s -w "\n%{http_code}" -X PUT \
   -H "Authorization: token $GITEA_TOKEN" \
   -H "Content-Type: application/json" \
-  -d "{\"data\":\"${GITEA_TOKEN}\"}" \
+  -d "$secret_payload" \
   "${API_BASE}/repos/${OWNER}/${REPO}/actions/secrets/RELEASE_TOKEN")
 http_code=$(echo "$resp" | tail -n1)
 body=$(echo "$resp" | sed '$d')
@@ -126,14 +130,16 @@ else
 fi
 
 # 2. 创建/更新 Variable: WEBHOOK_URL（可选）
+# 注意: Secret 和 Variable 均使用原始值，不要 base64 编码
 WEBHOOK_VALUE="${WEBHOOK_URL:-$GITEA_WEBHOOK_URL}"
 if [[ -n "$WEBHOOK_VALUE" ]]; then
   echo ""
   echo "2. 创建/更新 Variable: WEBHOOK_URL"
+  var_payload=$(jq -n --arg v "$WEBHOOK_VALUE" '{value: $v}')
   resp=$(curl -s -w "\n%{http_code}" -X POST \
     -H "Authorization: token $GITEA_TOKEN" \
     -H "Content-Type: application/json" \
-    -d "{\"value\":\"${WEBHOOK_VALUE}\"}" \
+    -d "$var_payload" \
     "${API_BASE}/repos/${OWNER}/${REPO}/actions/variables/WEBHOOK_URL")
   http_code=$(echo "$resp" | tail -n1)
   body=$(echo "$resp" | sed '$d')
@@ -145,7 +151,7 @@ if [[ -n "$WEBHOOK_VALUE" ]]; then
     resp=$(curl -s -w "\n%{http_code}" -X PUT \
       -H "Authorization: token $GITEA_TOKEN" \
       -H "Content-Type: application/json" \
-      -d "{\"value\":\"${WEBHOOK_VALUE}\"}" \
+      -d "$var_payload" \
       "${API_BASE}/repos/${OWNER}/${REPO}/actions/variables/WEBHOOK_URL")
     http_code=$(echo "$resp" | tail -n1)
     if [[ "$http_code" == "200" || "$http_code" == "204" ]]; then

src/audit.rs

@@ -1,18 +1,21 @@
-use anyhow::Result;
 use serde_json::Value;
-use sqlx::PgPool;
+use sqlx::{Postgres, Transaction};
 
-/// Write an audit entry for a write operation. Failures are logged as warnings
-/// and do not interrupt the main flow.
-pub async fn log(
-    pool: &PgPool,
+/// Return the current OS user as the audit actor (falls back to empty string).
+pub fn current_actor() -> String {
+    std::env::var("USER").unwrap_or_default()
+}
+
+/// Write an audit entry within an existing transaction.
+pub async fn log_tx(
+    tx: &mut Transaction<'_, Postgres>,
     action: &str,
     namespace: &str,
     kind: &str,
     name: &str,
     detail: Value,
 ) {
-    let actor = std::env::var("USER").unwrap_or_default();
+    let actor = current_actor();
     let result: Result<_, sqlx::Error> = sqlx::query(
         "INSERT INTO audit_log (action, namespace, kind, name, detail, actor) \
          VALUES ($1, $2, $3, $4, $5, $6)",
@@ -23,7 +26,7 @@ pub async fn log(
     .bind(name)
     .bind(&detail)
     .bind(&actor)
-    .execute(pool)
+    .execute(&mut **tx)
     .await;
 
     if let Err(e) = result {

src/commands/add.rs

@@ -3,17 +3,34 @@ use serde_json::{Map, Value, json};
 use sqlx::PgPool;
 use std::fs;
 
-use crate::output::OutputMode;
+use crate::crypto;
+use crate::db;
+use crate::models::EntryRow;
+use crate::output::{OutputMode, print_json};
 
-/// Parse "key=value" entries. Value starting with '@' reads from file.
-pub(crate) fn parse_kv(entry: &str) -> Result<(String, String)> {
-    let (key, raw_val) = entry.split_once('=').ok_or_else(|| {
+// ── Key/value parsing helpers (shared with update.rs) ───────────────────────
+
+/// Parse secret / metadata entries into a nested key path and JSON value.
+/// - `key=value`        → stores the literal string `value`
+/// - `key:=<json>`      → parses `<json>` as a typed JSON value
+/// - `key=@file`        → reads the file content as a string
+/// - `a:b=value`        → writes nested fields: `{ "a": { "b": "value" } }`
+/// - `a:b@./file.txt`   → shorthand for nested file reads without manual JSON escaping
+pub(crate) fn parse_kv(entry: &str) -> Result<(Vec<String>, Value)> {
+    // Typed JSON form: key:=<json>
+    if let Some((key, json_str)) = entry.split_once(":=") {
+        let val: Value = serde_json::from_str(json_str).map_err(|e| {
             anyhow::anyhow!(
-            "Invalid format '{}'. Expected: key=value or key=@file",
-            entry
+                "Invalid JSON value for key '{}': {} (use key=value for plain strings)",
+                key,
+                e
             )
         })?;
+        return Ok((parse_key_path(key)?, val));
+    }
 
+    // Plain string form: key=value or key=@file
+    if let Some((key, raw_val)) = entry.split_once('=') {
         let value = if let Some(path) = raw_val.strip_prefix('@') {
             fs::read_to_string(path)
                 .map_err(|e| anyhow::anyhow!("Failed to read file '{}': {}", path, e))?
@@ -21,18 +38,175 @@ pub(crate) fn parse_kv(entry: &str) -> Result<(String, String)> {
             raw_val.to_string()
         };
 
-    Ok((key.to_string(), value))
+        return Ok((parse_key_path(key)?, Value::String(value)));
     }
 
-fn build_json(entries: &[String]) -> Result<Value> {
+    // Shorthand file form: nested:key@file
+    if let Some((key, path)) = entry.split_once('@') {
+        let value = fs::read_to_string(path)
+            .map_err(|e| anyhow::anyhow!("Failed to read file '{}': {}", path, e))?;
+        return Ok((parse_key_path(key)?, Value::String(value)));
+    }
+
+    anyhow::bail!(
+        "Invalid format '{}'. Expected: key=value, key=@file, nested:key@file, or key:=<json>",
+        entry
+    )
+}
+
+pub(crate) fn build_json(entries: &[String]) -> Result<Value> {
     let mut map = Map::new();
     for entry in entries {
-        let (key, value) = parse_kv(entry)?;
-        map.insert(key, Value::String(value));
+        let (path, value) = parse_kv(entry)?;
+        insert_path(&mut map, &path, value)?;
     }
     Ok(Value::Object(map))
 }
 
+pub(crate) fn key_path_to_string(path: &[String]) -> String {
+    path.join(":")
+}
+
+pub(crate) fn collect_key_paths(entries: &[String]) -> Result<Vec<String>> {
+    entries
+        .iter()
+        .map(|entry| parse_kv(entry).map(|(path, _)| key_path_to_string(&path)))
+        .collect()
+}
+
+pub(crate) fn collect_field_paths(entries: &[String]) -> Result<Vec<String>> {
+    entries
+        .iter()
+        .map(|entry| parse_key_path(entry).map(|path| key_path_to_string(&path)))
+        .collect()
+}
+
+pub(crate) fn parse_key_path(key: &str) -> Result<Vec<String>> {
+    let path: Vec<String> = key
+        .split(':')
+        .map(str::trim)
+        .map(ToOwned::to_owned)
+        .collect();
+
+    if path.is_empty() || path.iter().any(|part| part.is_empty()) {
+        anyhow::bail!(
+            "Invalid key path '{}'. Use non-empty segments like 'credentials:content'.",
+            key
+        );
+    }
+
+    Ok(path)
+}
+
+pub(crate) fn insert_path(
+    map: &mut Map<String, Value>,
+    path: &[String],
+    value: Value,
+) -> Result<()> {
+    if path.is_empty() {
+        anyhow::bail!("Key path cannot be empty");
+    }
+
+    if path.len() == 1 {
+        map.insert(path[0].clone(), value);
+        return Ok(());
+    }
+
+    let head = path[0].clone();
+    let tail = &path[1..];
+
+    match map.entry(head.clone()) {
+        serde_json::map::Entry::Vacant(entry) => {
+            let mut child = Map::new();
+            insert_path(&mut child, tail, value)?;
+            entry.insert(Value::Object(child));
+        }
+        serde_json::map::Entry::Occupied(mut entry) => match entry.get_mut() {
+            Value::Object(child) => insert_path(child, tail, value)?,
+            _ => {
+                anyhow::bail!(
+                    "Cannot set nested key '{}' because '{}' is already a non-object value",
+                    key_path_to_string(path),
+                    head
+                );
+            }
+        },
+    }
+
+    Ok(())
+}
+
+pub(crate) fn remove_path(map: &mut Map<String, Value>, path: &[String]) -> Result<bool> {
+    if path.is_empty() {
+        anyhow::bail!("Key path cannot be empty");
+    }
+
+    if path.len() == 1 {
+        return Ok(map.remove(&path[0]).is_some());
+    }
+
+    let Some(value) = map.get_mut(&path[0]) else {
+        return Ok(false);
+    };
+
+    let Value::Object(child) = value else {
+        return Ok(false);
+    };
+
+    let removed = remove_path(child, &path[1..])?;
+    if child.is_empty() {
+        map.remove(&path[0]);
+    }
+
+    Ok(removed)
+}
+
+// ── field_type inference and value_len ──────────────────────────────────────
+
+/// Infer the field type string from a JSON value.
+pub(crate) fn infer_field_type(v: &Value) -> &'static str {
+    match v {
+        Value::String(_) => "string",
+        Value::Number(_) => "number",
+        Value::Bool(_) => "boolean",
+        Value::Null => "string",
+        Value::Array(_) | Value::Object(_) => "json",
+    }
+}
+
+/// Compute the plaintext length of a JSON value (chars for string, serialized length otherwise).
+pub(crate) fn compute_value_len(v: &Value) -> i32 {
+    match v {
+        Value::String(s) => s.chars().count() as i32,
+        Value::Null => 0,
+        other => other.to_string().chars().count() as i32,
+    }
+}
+
+/// Flatten a (potentially nested) JSON object into dot-separated field entries.
+/// e.g. `{"credentials": {"type": "ssh", "content": "..."}}` →
+///   `[("credentials.type", "ssh"), ("credentials.content", "...")]`
+/// Top-level non-object values are emitted directly.
+pub(crate) fn flatten_json_fields(prefix: &str, value: &Value) -> Vec<(String, Value)> {
+    match value {
+        Value::Object(map) => {
+            let mut out = Vec::new();
+            for (k, v) in map {
+                let full_key = if prefix.is_empty() {
+                    k.clone()
+                } else {
+                    format!("{}.{}", prefix, k)
+                };
+                out.extend(flatten_json_fields(&full_key, v));
+            }
+            out
+        }
+        other => vec![(prefix.to_string(), other.clone())],
+    }
+}
+
+// ── Add command ──────────────────────────────────────────────────────────────
+
 pub struct AddArgs<'a> {
     pub namespace: &'a str,
     pub kind: &'a str,
@@ -43,22 +217,59 @@ pub struct AddArgs<'a> {
     pub output: OutputMode,
 }
 
-pub async fn run(pool: &PgPool, args: AddArgs<'_>) -> Result<()> {
+pub async fn run(pool: &PgPool, args: AddArgs<'_>, master_key: &[u8; 32]) -> Result<()> {
     let metadata = build_json(args.meta_entries)?;
-    let encrypted = build_json(args.secret_entries)?;
+    let secret_json = build_json(args.secret_entries)?;
 
-    tracing::debug!(args.namespace, args.kind, args.name, "upserting record");
+    tracing::debug!(args.namespace, args.kind, args.name, "upserting entry");
 
-    sqlx::query(
+    let meta_keys = collect_key_paths(args.meta_entries)?;
+    let secret_keys = collect_key_paths(args.secret_entries)?;
+
+    let mut tx = pool.begin().await?;
+
+    // Upsert the entry row (tags + metadata).
+    let existing: Option<EntryRow> = sqlx::query_as(
+        "SELECT id, version, tags, metadata FROM entries \
+         WHERE namespace = $1 AND kind = $2 AND name = $3",
+    )
+    .bind(args.namespace)
+    .bind(args.kind)
+    .bind(args.name)
+    .fetch_optional(&mut *tx)
+    .await?;
+
+    // Snapshot the current entry state before overwriting.
+    if let Some(ref ex) = existing
+        && let Err(e) = db::snapshot_entry_history(
+            &mut tx,
+            db::EntrySnapshotParams {
+                entry_id: ex.id,
+                namespace: args.namespace,
+                kind: args.kind,
+                name: args.name,
+                version: ex.version,
+                action: "add",
+                tags: &ex.tags,
+                metadata: &ex.metadata,
+            },
+        )
+        .await
+    {
+        tracing::warn!(error = %e, "failed to snapshot entry history before upsert");
+    }
+
+    let entry_id: uuid::Uuid = sqlx::query_scalar(
         r#"
-        INSERT INTO secrets (namespace, kind, name, tags, metadata, encrypted, updated_at)
-        VALUES ($1, $2, $3, $4, $5, $6, NOW())
+        INSERT INTO entries (namespace, kind, name, tags, metadata, version, updated_at)
+        VALUES ($1, $2, $3, $4, $5, 1, NOW())
         ON CONFLICT (namespace, kind, name)
         DO UPDATE SET
             tags       = EXCLUDED.tags,
             metadata   = EXCLUDED.metadata,
-            encrypted = EXCLUDED.encrypted,
+            version    = entries.version + 1,
             updated_at = NOW()
+        RETURNING id
         "#,
     )
     .bind(args.namespace)
@@ -66,23 +277,81 @@ pub async fn run(pool: &PgPool, args: AddArgs<'_>) -> Result<()> {
     .bind(args.name)
     .bind(args.tags)
     .bind(&metadata)
-    .bind(&encrypted)
-    .execute(pool)
+    .fetch_one(&mut *tx)
     .await?;
 
-    let meta_keys: Vec<&str> = args
-        .meta_entries
-        .iter()
-        .filter_map(|s| s.split_once('=').map(|(k, _)| k))
-        .collect();
-    let secret_keys: Vec<&str> = args
-        .secret_entries
-        .iter()
-        .filter_map(|s| s.split_once('=').map(|(k, _)| k))
-        .collect();
+    let new_entry_version: i64 = sqlx::query_scalar("SELECT version FROM entries WHERE id = $1")
+        .bind(entry_id)
+        .fetch_one(&mut *tx)
+        .await?;
 
-    crate::audit::log(
-        pool,
+    // Snapshot existing secret fields before replacing.
+    if existing.is_some() {
+        #[derive(sqlx::FromRow)]
+        struct ExistingField {
+            id: uuid::Uuid,
+            field_name: String,
+            field_type: String,
+            value_len: i32,
+            encrypted: Vec<u8>,
+        }
+        let existing_fields: Vec<ExistingField> = sqlx::query_as(
+            "SELECT id, field_name, field_type, value_len, encrypted \
+             FROM secrets WHERE entry_id = $1",
+        )
+        .bind(entry_id)
+        .fetch_all(&mut *tx)
+        .await?;
+
+        for f in &existing_fields {
+            if let Err(e) = db::snapshot_secret_history(
+                &mut tx,
+                db::SecretSnapshotParams {
+                    entry_id,
+                    secret_id: f.id,
+                    entry_version: new_entry_version - 1,
+                    field_name: &f.field_name,
+                    field_type: &f.field_type,
+                    value_len: f.value_len,
+                    encrypted: &f.encrypted,
+                    action: "add",
+                },
+            )
+            .await
+            {
+                tracing::warn!(error = %e, "failed to snapshot secret field history");
+            }
+        }
+
+        // Delete existing secret fields so we can re-insert the full set.
+        sqlx::query("DELETE FROM secrets WHERE entry_id = $1")
+            .bind(entry_id)
+            .execute(&mut *tx)
+            .await?;
+    }
+
+    // Insert new secret fields.
+    let flat_fields = flatten_json_fields("", &secret_json);
+    for (field_name, field_value) in &flat_fields {
+        let field_type = infer_field_type(field_value);
+        let value_len = compute_value_len(field_value);
+        let encrypted = crypto::encrypt_json(master_key, field_value)?;
+
+        sqlx::query(
+            "INSERT INTO secrets (entry_id, field_name, field_type, value_len, encrypted) \
+             VALUES ($1, $2, $3, $4, $5)",
+        )
+        .bind(entry_id)
+        .bind(field_name)
+        .bind(field_type)
+        .bind(value_len)
+        .bind(&encrypted)
+        .execute(&mut *tx)
+        .await?;
+    }
+
+    crate::audit::log_tx(
+        &mut tx,
         "add",
         args.namespace,
         args.kind,
@@ -95,6 +364,8 @@ pub async fn run(pool: &PgPool, args: AddArgs<'_>) -> Result<()> {
     )
     .await;
 
+    tx.commit().await?;
+
     let result_json = json!({
         "action": "added",
         "namespace": args.namespace,
@@ -106,11 +377,8 @@ pub async fn run(pool: &PgPool, args: AddArgs<'_>) -> Result<()> {
     });
 
     match args.output {
-        OutputMode::Json => {
-            println!("{}", serde_json::to_string_pretty(&result_json)?);
-        }
-        OutputMode::JsonCompact => {
-            println!("{}", serde_json::to_string(&result_json)?);
+        OutputMode::Json | OutputMode::JsonCompact => {
+            print_json(&result_json, &args.output)?;
         }
         _ => {
             println!("Added: [{}/{}] {}", args.namespace, args.kind, args.name);
@@ -128,3 +396,112 @@ pub async fn run(pool: &PgPool, args: AddArgs<'_>) -> Result<()> {
 
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::{
+        build_json, compute_value_len, flatten_json_fields, infer_field_type, key_path_to_string,
+        parse_kv, remove_path,
+    };
+    use serde_json::Value;
+    use std::fs;
+    use std::path::PathBuf;
+    use std::time::{SystemTime, UNIX_EPOCH};
+
+    fn temp_file_path(name: &str) -> PathBuf {
+        let nanos = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .expect("clock should be after unix epoch")
+            .as_nanos();
+        std::env::temp_dir().join(format!("secrets-{name}-{nanos}.txt"))
+    }
+
+    #[test]
+    fn parse_nested_file_shorthand() {
+        let path = temp_file_path("ssh-key");
+        fs::write(&path, "line1\nline2\n").expect("should write temp file");
+
+        let entry = format!("credentials:content@{}", path.display());
+        let (path_parts, value) = parse_kv(&entry).expect("should parse nested file shorthand");
+
+        assert_eq!(key_path_to_string(&path_parts), "credentials:content");
+        assert_eq!(value, serde_json::Value::String("line1\nline2\n".into()));
+
+        fs::remove_file(path).expect("should remove temp file");
+    }
+
+    #[test]
+    fn build_nested_json_from_mixed_entries() {
+        let payload = vec![
+            "credentials:type=ssh".to_string(),
+            "credentials:enabled:=true".to_string(),
+            "username=root".to_string(),
+        ];
+
+        let value = build_json(&payload).expect("should build nested json");
+
+        assert_eq!(
+            value,
+            serde_json::json!({
+                "credentials": {
+                    "type": "ssh",
+                    "enabled": true
+                },
+                "username": "root"
+            })
+        );
+    }
+
+    #[test]
+    fn remove_nested_path_prunes_empty_parents() {
+        let mut value = serde_json::json!({
+            "credentials": {
+                "content": "pem-data"
+            },
+            "username": "root"
+        });
+
+        let map = match &mut value {
+            Value::Object(map) => map,
+            _ => panic!("expected object"),
+        };
+
+        let removed = remove_path(map, &["credentials".to_string(), "content".to_string()])
+            .expect("should remove nested field");
+
+        assert!(removed);
+        assert_eq!(value, serde_json::json!({ "username": "root" }));
+    }
+
+    #[test]
+    fn flatten_json_fields_nested() {
+        let v = serde_json::json!({
+            "username": "root",
+            "credentials": {
+                "type": "ssh",
+                "content": "pem-data"
+            }
+        });
+        let mut fields = flatten_json_fields("", &v);
+        fields.sort_by(|a, b| a.0.cmp(&b.0));
+
+        assert_eq!(fields[0].0, "credentials.content");
+        assert_eq!(fields[1].0, "credentials.type");
+        assert_eq!(fields[2].0, "username");
+    }
+
+    #[test]
+    fn infer_field_types() {
+        assert_eq!(infer_field_type(&Value::String("x".into())), "string");
+        assert_eq!(infer_field_type(&serde_json::json!(42)), "number");
+        assert_eq!(infer_field_type(&Value::Bool(true)), "boolean");
+        assert_eq!(infer_field_type(&serde_json::json!(["a"])), "json");
+    }
+
+    #[test]
+    fn compute_value_len_string() {
+        assert_eq!(compute_value_len(&Value::String("root".into())), 4);
+        assert_eq!(compute_value_len(&Value::Null), 0);
+        assert_eq!(compute_value_len(&serde_json::json!(1234)), 4);
+    }
+}

src/commands/config.rs

@@ -1,43 +1,44 @@
 use crate::config::{self, Config, config_path};
 use anyhow::Result;
 
-pub enum ConfigAction {
-    SetDb { url: String },
-    Show,
-    Path,
-}
-
-pub async fn run(action: ConfigAction) -> Result<()> {
+pub async fn run(action: crate::ConfigAction) -> Result<()> {
     match action {
-        ConfigAction::SetDb { url } => {
+        crate::ConfigAction::SetDb { url } => {
+            // Verify connection before writing config
+            let pool = crate::db::create_pool(&url)
+                .await
+                .map_err(|e| anyhow::anyhow!("Database connection failed: {}", e))?;
+            drop(pool);
+            println!("Database connection successful.");
+
             let cfg = Config {
                 database_url: Some(url.clone()),
             };
             config::save_config(&cfg)?;
-            println!("✓ 数据库连接串已保存到: {}", config_path().display());
+            println!("Database URL saved to: {}", config_path()?.display());
             println!("  {}", mask_password(&url));
         }
-        ConfigAction::Show => {
+        crate::ConfigAction::Show => {
             let cfg = config::load_config()?;
             match cfg.database_url {
                 Some(url) => {
                     println!("database_url = {}", mask_password(&url));
-                    println!("配置文件: {}", config_path().display());
+                    println!("config file:  {}", config_path()?.display());
                 }
                 None => {
-                    println!("未配置数据库连接串。");
-                    println!("请运行：secrets config set-db <DATABASE_URL>");
+                    println!("Database URL not configured.");
+                    println!("Run: secrets config set-db <DATABASE_URL>");
                 }
             }
         }
-        ConfigAction::Path => {
-            println!("{}", config_path().display());
+        crate::ConfigAction::Path => {
+            println!("{}", config_path()?.display());
         }
     }
     Ok(())
 }
 
-/// 将 postgres://user:password@host/db 中的密码替换为 ***
+/// Mask the password in a postgres://user:password@host/db URL.
 fn mask_password(url: &str) -> String {
     if let Some(at_pos) = url.rfind('@')
         && let Some(scheme_end) = url.find("://")

src/commands/delete.rs

@@ -1,24 +1,293 @@
 use anyhow::Result;
 use serde_json::json;
 use sqlx::PgPool;
+use uuid::Uuid;
 
-pub async fn run(pool: &PgPool, namespace: &str, kind: &str, name: &str) -> Result<()> {
-    tracing::debug!(namespace, kind, name, "deleting record");
+use crate::db;
+use crate::models::{EntryRow, SecretFieldRow};
+use crate::output::{OutputMode, print_json};
 
-    let result =
-        sqlx::query("DELETE FROM secrets WHERE namespace = $1 AND kind = $2 AND name = $3")
+pub struct DeleteArgs<'a> {
+    pub namespace: &'a str,
+    /// Kind filter. Required when --name is given; optional for bulk deletes.
+    pub kind: Option<&'a str>,
+    /// Exact record name. When None, bulk-delete all matching records.
+    pub name: Option<&'a str>,
+    /// Preview without writing to the database (bulk mode only).
+    pub dry_run: bool,
+    pub output: OutputMode,
+}
+
+// ── Internal row type used for bulk queries ────────────────────────────────
+
+#[derive(Debug, sqlx::FromRow)]
+struct FullEntryRow {
+    pub id: Uuid,
+    pub version: i64,
+    pub kind: String,
+    pub name: String,
+    pub metadata: serde_json::Value,
+    pub tags: Vec<String>,
+}
+
+// ── Entry point ────────────────────────────────────────────────────────────
+
+pub async fn run(pool: &PgPool, args: DeleteArgs<'_>) -> Result<()> {
+    match args.name {
+        Some(name) => {
+            let kind = args
+                .kind
+                .ok_or_else(|| anyhow::anyhow!("--kind is required when --name is specified"))?;
+            delete_one(pool, args.namespace, kind, name, args.output).await
+        }
+        None => delete_bulk(pool, args.namespace, args.kind, args.dry_run, args.output).await,
+    }
+}
+
+// ── Single-record delete (original behaviour) ─────────────────────────────
+
+async fn delete_one(
+    pool: &PgPool,
+    namespace: &str,
+    kind: &str,
+    name: &str,
+    output: OutputMode,
+) -> Result<()> {
+    tracing::debug!(namespace, kind, name, "deleting entry");
+
+    let mut tx = pool.begin().await?;
+
+    let row: Option<EntryRow> = sqlx::query_as(
+        "SELECT id, version, tags, metadata FROM entries \
+         WHERE namespace = $1 AND kind = $2 AND name = $3 \
+         FOR UPDATE",
+    )
     .bind(namespace)
     .bind(kind)
     .bind(name)
-            .execute(pool)
+    .fetch_optional(&mut *tx)
     .await?;
 
-    if result.rows_affected() == 0 {
-        tracing::warn!(namespace, kind, name, "record not found for deletion");
-        println!("Not found: [{}/{}] {}", namespace, kind, name);
-    } else {
-        crate::audit::log(pool, "delete", namespace, kind, name, json!({})).await;
-        println!("Deleted: [{}/{}] {}", namespace, kind, name);
+    let Some(row) = row else {
+        tx.rollback().await?;
+        tracing::warn!(namespace, kind, name, "entry not found for deletion");
+        let v = json!({"action":"not_found","namespace":namespace,"kind":kind,"name":name});
+        match output {
+            OutputMode::Text => println!("Not found: [{}/{}] {}", namespace, kind, name),
+            ref mode => print_json(&v, mode)?,
+        }
+        return Ok(());
+    };
+
+    snapshot_and_delete(&mut tx, namespace, kind, name, &row).await?;
+
+    crate::audit::log_tx(&mut tx, "delete", namespace, kind, name, json!({})).await;
+    tx.commit().await?;
+
+    let v = json!({"action":"deleted","namespace":namespace,"kind":kind,"name":name});
+    match output {
+        OutputMode::Text => println!("Deleted: [{}/{}] {}", namespace, kind, name),
+        ref mode => print_json(&v, mode)?,
     }
     Ok(())
 }
+
+// ── Bulk delete by namespace (+ optional kind filter) ─────────────────────
+
+async fn delete_bulk(
+    pool: &PgPool,
+    namespace: &str,
+    kind: Option<&str>,
+    dry_run: bool,
+    output: OutputMode,
+) -> Result<()> {
+    tracing::debug!(namespace, ?kind, dry_run, "bulk-deleting entries");
+
+    let rows: Vec<FullEntryRow> = if let Some(k) = kind {
+        sqlx::query_as(
+            "SELECT id, version, kind, name, metadata, tags FROM entries \
+             WHERE namespace = $1 AND kind = $2 \
+             ORDER BY name",
+        )
+        .bind(namespace)
+        .bind(k)
+        .fetch_all(pool)
+        .await?
+    } else {
+        sqlx::query_as(
+            "SELECT id, version, kind, name, metadata, tags FROM entries \
+             WHERE namespace = $1 \
+             ORDER BY kind, name",
+        )
+        .bind(namespace)
+        .fetch_all(pool)
+        .await?
+    };
+
+    if rows.is_empty() {
+        let v = json!({
+            "action": "noop",
+            "namespace": namespace,
+            "kind": kind,
+            "deleted": 0,
+            "dry_run": dry_run
+        });
+        match output {
+            OutputMode::Text => println!(
+                "No records found in namespace \"{}\"{}.",
+                namespace,
+                kind.map(|k| format!(" with kind \"{}\"", k))
+                    .unwrap_or_default()
+            ),
+            ref mode => print_json(&v, mode)?,
+        }
+        return Ok(());
+    }
+
+    if dry_run {
+        let count = rows.len();
+        match output {
+            OutputMode::Text => {
+                println!(
+                    "dry-run: would delete {} record(s) in namespace \"{}\":",
+                    count, namespace
+                );
+                for r in &rows {
+                    println!("  [{}/{}] {}", namespace, r.kind, r.name);
+                }
+            }
+            ref mode => {
+                let items: Vec<_> = rows
+                    .iter()
+                    .map(|r| json!({"namespace": namespace, "kind": r.kind, "name": r.name}))
+                    .collect();
+                print_json(
+                    &json!({
+                        "action": "dry_run",
+                        "namespace": namespace,
+                        "kind": kind,
+                        "would_delete": count,
+                        "entries": items
+                    }),
+                    mode,
+                )?;
+            }
+        }
+        return Ok(());
+    }
+
+    let mut deleted = Vec::with_capacity(rows.len());
+
+    for row in &rows {
+        let entry_row = EntryRow {
+            id: row.id,
+            version: row.version,
+            tags: row.tags.clone(),
+            metadata: row.metadata.clone(),
+        };
+        let mut tx = pool.begin().await?;
+        snapshot_and_delete(&mut tx, namespace, &row.kind, &row.name, &entry_row).await?;
+        crate::audit::log_tx(
+            &mut tx,
+            "delete",
+            namespace,
+            &row.kind,
+            &row.name,
+            json!({"bulk": true}),
+        )
+        .await;
+        tx.commit().await?;
+
+        deleted.push(json!({"namespace": namespace, "kind": row.kind, "name": row.name}));
+        tracing::info!(namespace, kind = %row.kind, name = %row.name, "bulk deleted");
+    }
+
+    let count = deleted.len();
+    match output {
+        OutputMode::Text => {
+            for item in &deleted {
+                println!(
+                    "Deleted: [{}/{}] {}",
+                    item["namespace"].as_str().unwrap_or(""),
+                    item["kind"].as_str().unwrap_or(""),
+                    item["name"].as_str().unwrap_or("")
+                );
+            }
+            println!("Total: {} record(s) deleted.", count);
+        }
+        ref mode => print_json(
+            &json!({
+                "action": "deleted",
+                "namespace": namespace,
+                "kind": kind,
+                "deleted": count,
+                "entries": deleted
+            }),
+            mode,
+        )?,
+    }
+    Ok(())
+}
+
+// ── Shared helper: snapshot history then DELETE ────────────────────────────
+
+async fn snapshot_and_delete(
+    tx: &mut sqlx::Transaction<'_, sqlx::Postgres>,
+    namespace: &str,
+    kind: &str,
+    name: &str,
+    row: &EntryRow,
+) -> Result<()> {
+    if let Err(e) = db::snapshot_entry_history(
+        tx,
+        db::EntrySnapshotParams {
+            entry_id: row.id,
+            namespace,
+            kind,
+            name,
+            version: row.version,
+            action: "delete",
+            tags: &row.tags,
+            metadata: &row.metadata,
+        },
+    )
+    .await
+    {
+        tracing::warn!(error = %e, "failed to snapshot entry history before delete");
+    }
+
+    let fields: Vec<SecretFieldRow> = sqlx::query_as(
+        "SELECT id, field_name, field_type, value_len, encrypted \
+         FROM secrets WHERE entry_id = $1",
+    )
+    .bind(row.id)
+    .fetch_all(&mut **tx)
+    .await?;
+
+    for f in &fields {
+        if let Err(e) = db::snapshot_secret_history(
+            tx,
+            db::SecretSnapshotParams {
+                entry_id: row.id,
+                secret_id: f.id,
+                entry_version: row.version,
+                field_name: &f.field_name,
+                field_type: &f.field_type,
+                value_len: f.value_len,
+                encrypted: &f.encrypted,
+                action: "delete",
+            },
+        )
+        .await
+        {
+            tracing::warn!(error = %e, "failed to snapshot secret history before delete");
+        }
+    }
+
+    sqlx::query("DELETE FROM entries WHERE id = $1")
+        .bind(row.id)
+        .execute(&mut **tx)
+        .await?;
+
+    Ok(())
+}

src/commands/export_cmd.rs

@@ -0,0 +1,109 @@
+use anyhow::Result;
+use sqlx::PgPool;
+use std::collections::BTreeMap;
+use std::io::Write;
+
+use crate::commands::search::{fetch_entries, fetch_secrets_for_entries};
+use crate::crypto;
+use crate::models::{ExportData, ExportEntry, ExportFormat};
+
+pub struct ExportArgs<'a> {
+    pub namespace: Option<&'a str>,
+    pub kind: Option<&'a str>,
+    pub name: Option<&'a str>,
+    pub tags: &'a [String],
+    pub query: Option<&'a str>,
+    /// Output file path. None means write to stdout.
+    pub file: Option<&'a str>,
+    /// Explicit format override (e.g. from --format flag).
+    pub format: Option<&'a str>,
+    /// When true, secrets are omitted and master_key is not used.
+    pub no_secrets: bool,
+}
+
+pub async fn run(pool: &PgPool, args: ExportArgs<'_>, master_key: Option<&[u8; 32]>) -> Result<()> {
+    // Determine output format: --format > file extension > default JSON.
+    let format = if let Some(fmt_str) = args.format {
+        ExportFormat::from_str(fmt_str)?
+    } else if let Some(path) = args.file {
+        ExportFormat::from_extension(path).unwrap_or(ExportFormat::Json)
+    } else {
+        ExportFormat::Json
+    };
+
+    let entries = fetch_entries(
+        pool,
+        args.namespace,
+        args.kind,
+        args.name,
+        args.tags,
+        args.query,
+    )
+    .await?;
+
+    let entry_ids: Vec<uuid::Uuid> = entries.iter().map(|e| e.id).collect();
+
+    let secrets_map = if !args.no_secrets && !entry_ids.is_empty() {
+        fetch_secrets_for_entries(pool, &entry_ids).await?
+    } else {
+        std::collections::HashMap::new()
+    };
+
+    let key = if !args.no_secrets { master_key } else { None };
+
+    let mut export_entries: Vec<ExportEntry> = Vec::with_capacity(entries.len());
+    for entry in &entries {
+        let secrets = if args.no_secrets {
+            None
+        } else {
+            let fields = secrets_map.get(&entry.id).map(Vec::as_slice).unwrap_or(&[]);
+            if fields.is_empty() {
+                Some(BTreeMap::new())
+            } else {
+                let mk =
+                    key.ok_or_else(|| anyhow::anyhow!("master key required to decrypt secrets"))?;
+                let mut map = BTreeMap::new();
+                for f in fields {
+                    let decrypted = crypto::decrypt_json(mk, &f.encrypted)?;
+                    map.insert(f.field_name.clone(), decrypted);
+                }
+                Some(map)
+            }
+        };
+
+        export_entries.push(ExportEntry {
+            namespace: entry.namespace.clone(),
+            kind: entry.kind.clone(),
+            name: entry.name.clone(),
+            tags: entry.tags.clone(),
+            metadata: entry.metadata.clone(),
+            secrets,
+        });
+    }
+
+    let data = ExportData {
+        version: 1,
+        exported_at: chrono::Utc::now().format("%Y-%m-%dT%H:%M:%SZ").to_string(),
+        entries: export_entries,
+    };
+
+    let serialized = format.serialize(&data)?;
+
+    if let Some(path) = args.file {
+        std::fs::write(path, &serialized)?;
+        println!(
+            "Exported {} record(s) to {} ({:?})",
+            data.entries.len(),
+            path,
+            format
+        );
+    } else {
+        std::io::stdout().write_all(serialized.as_bytes())?;
+        // Ensure trailing newline on stdout.
+        if !serialized.ends_with('\n') {
+            println!();
+        }
+    }
+
+    Ok(())
+}

src/commands/history.rs

@@ -0,0 +1,78 @@
+use anyhow::Result;
+use serde_json::{Value, json};
+use sqlx::{FromRow, PgPool};
+
+use crate::output::{OutputMode, format_local_time, print_json};
+
+pub struct HistoryArgs<'a> {
+    pub namespace: &'a str,
+    pub kind: &'a str,
+    pub name: &'a str,
+    pub limit: u32,
+    pub output: OutputMode,
+}
+
+/// List history entries for an entry.
+pub async fn run(pool: &PgPool, args: HistoryArgs<'_>) -> Result<()> {
+    #[derive(FromRow)]
+    struct HistorySummary {
+        version: i64,
+        action: String,
+        actor: String,
+        created_at: chrono::DateTime<chrono::Utc>,
+    }
+
+    let rows: Vec<HistorySummary> = sqlx::query_as(
+        "SELECT version, action, actor, created_at FROM entries_history \
+         WHERE namespace = $1 AND kind = $2 AND name = $3 \
+         ORDER BY id DESC LIMIT $4",
+    )
+    .bind(args.namespace)
+    .bind(args.kind)
+    .bind(args.name)
+    .bind(args.limit as i64)
+    .fetch_all(pool)
+    .await?;
+
+    match args.output {
+        OutputMode::Json | OutputMode::JsonCompact => {
+            let arr: Vec<Value> = rows
+                .iter()
+                .map(|r| {
+                    json!({
+                        "version": r.version,
+                        "action": r.action,
+                        "actor": r.actor,
+                        "created_at": r.created_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
+                    })
+                })
+                .collect();
+            print_json(&Value::Array(arr), &args.output)?;
+        }
+        _ => {
+            if rows.is_empty() {
+                println!(
+                    "No history found for [{}/{}] {}.",
+                    args.namespace, args.kind, args.name
+                );
+                return Ok(());
+            }
+            println!(
+                "History for [{}/{}] {}:",
+                args.namespace, args.kind, args.name
+            );
+            for r in &rows {
+                println!(
+                    "  v{:<4}  {:8}  {}  {}",
+                    r.version,
+                    r.action,
+                    r.actor,
+                    format_local_time(r.created_at)
+                );
+            }
+            println!("  (use `secrets rollback --to-version <N>` to restore)");
+        }
+    }
+
+    Ok(())
+}

src/commands/import_cmd.rs

@@ -0,0 +1,217 @@
+use anyhow::Result;
+use serde_json::Value;
+use sqlx::PgPool;
+use std::collections::BTreeMap;
+
+use crate::commands::add::{self, AddArgs};
+use crate::models::ExportFormat;
+use crate::output::{OutputMode, print_json};
+
+pub struct ImportArgs<'a> {
+    pub file: &'a str,
+    /// Overwrite existing records when there is a conflict (upsert).
+    /// Without this flag, the import aborts on the first conflict.
+    /// A future `--skip` flag could allow silently skipping conflicts and continuing.
+    pub force: bool,
+    /// Check and preview operations without writing to the database.
+    pub dry_run: bool,
+    pub output: OutputMode,
+}
+
+pub async fn run(pool: &PgPool, args: ImportArgs<'_>, master_key: &[u8; 32]) -> Result<()> {
+    let format = ExportFormat::from_extension(args.file)?;
+    let content = std::fs::read_to_string(args.file)
+        .map_err(|e| anyhow::anyhow!("Cannot read file '{}': {}", args.file, e))?;
+    let data = format.deserialize(&content)?;
+
+    if data.version != 1 {
+        anyhow::bail!(
+            "Unsupported export version {}. Only version 1 is supported.",
+            data.version
+        );
+    }
+
+    let total = data.entries.len();
+    let mut inserted = 0usize;
+    let mut skipped = 0usize;
+    let mut failed = 0usize;
+
+    for entry in &data.entries {
+        // Check if record already exists.
+        let exists: bool = sqlx::query_scalar(
+            "SELECT EXISTS(SELECT 1 FROM entries \
+             WHERE namespace = $1 AND kind = $2 AND name = $3)",
+        )
+        .bind(&entry.namespace)
+        .bind(&entry.kind)
+        .bind(&entry.name)
+        .fetch_one(pool)
+        .await
+        .unwrap_or(false);
+
+        if exists && !args.force {
+            let v = serde_json::json!({
+                "action": "conflict",
+                "namespace": entry.namespace,
+                "kind": entry.kind,
+                "name": entry.name,
+            });
+            match args.output {
+                OutputMode::Text => eprintln!(
+                    "[{}/{}/{}] conflict — record already exists (use --force to overwrite)",
+                    entry.namespace, entry.kind, entry.name
+                ),
+                ref mode => {
+                    // Write conflict notice to stderr so it does not mix with summary JSON.
+                    eprint!(
+                        "{}",
+                        if *mode == OutputMode::Json {
+                            serde_json::to_string_pretty(&v)?
+                        } else {
+                            serde_json::to_string(&v)?
+                        }
+                    );
+                    eprintln!();
+                }
+            }
+            return Err(anyhow::anyhow!(
+                "Import aborted: conflict on [{}/{}/{}]",
+                entry.namespace,
+                entry.kind,
+                entry.name
+            ));
+        }
+
+        let action = if exists { "upsert" } else { "insert" };
+
+        if args.dry_run {
+            let v = serde_json::json!({
+                "action": action,
+                "namespace": entry.namespace,
+                "kind": entry.kind,
+                "name": entry.name,
+                "dry_run": true,
+            });
+            match args.output {
+                OutputMode::Text => println!(
+                    "[dry-run] {} [{}/{}/{}]",
+                    action, entry.namespace, entry.kind, entry.name
+                ),
+                ref mode => print_json(&v, mode)?,
+            }
+            if exists {
+                skipped += 1;
+            } else {
+                inserted += 1;
+            }
+            continue;
+        }
+
+        // Build secret_entries: convert BTreeMap<String, Value> to Vec<String> ("key:=json")
+        let secret_entries = build_secret_entries(entry.secrets.as_ref());
+
+        // Build meta_entries from metadata JSON object.
+        let meta_entries = build_meta_entries(&entry.metadata);
+
+        match add::run(
+            pool,
+            AddArgs {
+                namespace: &entry.namespace,
+                kind: &entry.kind,
+                name: &entry.name,
+                tags: &entry.tags,
+                meta_entries: &meta_entries,
+                secret_entries: &secret_entries,
+                output: OutputMode::Text,
+            },
+            master_key,
+        )
+        .await
+        {
+            Ok(()) => {
+                let v = serde_json::json!({
+                    "action": action,
+                    "namespace": entry.namespace,
+                    "kind": entry.kind,
+                    "name": entry.name,
+                });
+                match args.output {
+                    OutputMode::Text => println!(
+                        "Imported [{}/{}/{}]",
+                        entry.namespace, entry.kind, entry.name
+                    ),
+                    ref mode => print_json(&v, mode)?,
+                }
+                inserted += 1;
+            }
+            Err(e) => {
+                eprintln!(
+                    "Error importing [{}/{}/{}]: {}",
+                    entry.namespace, entry.kind, entry.name, e
+                );
+                failed += 1;
+            }
+        }
+    }
+
+    let summary = serde_json::json!({
+        "total": total,
+        "inserted": inserted,
+        "skipped": skipped,
+        "failed": failed,
+        "dry_run": args.dry_run,
+    });
+    match args.output {
+        OutputMode::Text => {
+            if args.dry_run {
+                println!(
+                    "\n[dry-run] {} total: {} would insert, {} would skip, {} would fail",
+                    total, inserted, skipped, failed
+                );
+            } else {
+                println!(
+                    "\nImport done: {} total — {} inserted, {} skipped, {} failed",
+                    total, inserted, skipped, failed
+                );
+            }
+        }
+        ref mode => print_json(&summary, mode)?,
+    }
+
+    if failed > 0 {
+        anyhow::bail!("{} record(s) failed to import", failed);
+    }
+
+    Ok(())
+}
+
+/// Convert metadata JSON object into Vec<String> of "key:=json_value" entries.
+fn build_meta_entries(metadata: &Value) -> Vec<String> {
+    let mut entries = Vec::new();
+    if let Some(obj) = metadata.as_object() {
+        for (k, v) in obj {
+            entries.push(value_to_kv_entry(k, v));
+        }
+    }
+    entries
+}
+
+/// Convert a BTreeMap<String, Value> (secrets) into Vec<String> of "key:=json_value" entries.
+fn build_secret_entries(secrets: Option<&BTreeMap<String, Value>>) -> Vec<String> {
+    let mut entries = Vec::new();
+    if let Some(map) = secrets {
+        for (k, v) in map {
+            entries.push(value_to_kv_entry(k, v));
+        }
+    }
+    entries
+}
+
+/// Convert a key/value pair to a CLI-style entry string.
+/// Strings use `key=value`; everything else uses `key:=<json>`.
+fn value_to_kv_entry(key: &str, value: &Value) -> String {
+    match value {
+        Value::String(s) => format!("{}={}", key, s),
+        other => format!("{}:={}", key, other),
+    }
+}

src/commands/init.rs

@@ -0,0 +1,70 @@
+use anyhow::{Context, Result};
+use rand::RngExt;
+use sqlx::PgPool;
+
+use crate::{crypto, db};
+
+const MIN_MASTER_PASSWORD_LEN: usize = 8;
+
+pub async fn run(pool: &PgPool) -> Result<()> {
+    println!("Initializing secrets master key...");
+    println!();
+
+    // Read password (no echo)
+    let password = rpassword::prompt_password(format!(
+        "Enter master password (at least {} characters): ",
+        MIN_MASTER_PASSWORD_LEN
+    ))
+    .context("failed to read password")?;
+    if password.chars().count() < MIN_MASTER_PASSWORD_LEN {
+        anyhow::bail!(
+            "Master password must be at least {} characters.",
+            MIN_MASTER_PASSWORD_LEN
+        );
+    }
+    let confirm = rpassword::prompt_password("Confirm master password: ")
+        .context("failed to read password confirmation")?;
+    if password != confirm {
+        anyhow::bail!("Passwords do not match.");
+    }
+
+    // Get or create Argon2id salt
+    let salt = match db::load_argon2_salt(pool).await? {
+        Some(existing) => {
+            println!("Found existing salt in database (not the first device).");
+            existing
+        }
+        None => {
+            println!("Generating new Argon2id salt and storing in database...");
+            let mut salt = vec![0u8; 16];
+            rand::rng().fill(&mut salt[..]);
+            db::store_argon2_salt(pool, &salt).await?;
+            salt
+        }
+    };
+
+    // Derive master key
+    print!("Deriving master key (Argon2id, this takes a moment)... ");
+    let master_key = crypto::derive_master_key(&password, &salt)?;
+    println!("done.");
+
+    // Store in OS Keychain
+    crypto::store_master_key(&master_key)?;
+
+    // Self-test: encrypt and decrypt a canary value
+    let canary = b"secrets-cli-canary";
+    let enc = crypto::encrypt(&master_key, canary)?;
+    let dec = crypto::decrypt(&master_key, &enc)?;
+    if dec != canary {
+        anyhow::bail!("Self-test failed: encryption roundtrip mismatch");
+    }
+
+    println!();
+    println!("Master key stored in OS Keychain.");
+    println!("You can now use `secrets add` / `secrets search` commands.");
+    println!();
+    println!("IMPORTANT: Remember your master password — it is not stored anywhere.");
+    println!("           On a new device, run `secrets init` with the same password.");
+
+    Ok(())
+}

src/commands/mod.rs

@@ -1,5 +1,12 @@
 pub mod add;
 pub mod config;
 pub mod delete;
+pub mod export_cmd;
+pub mod history;
+pub mod import_cmd;
+pub mod init;
+pub mod rollback;
+pub mod run;
 pub mod search;
 pub mod update;
+pub mod upgrade;

src/commands/rollback.rs

@@ -0,0 +1,266 @@
+use anyhow::Result;
+use serde_json::{Value, json};
+use sqlx::{FromRow, PgPool};
+use uuid::Uuid;
+
+use crate::crypto;
+use crate::db;
+use crate::output::{OutputMode, print_json};
+
+pub struct RollbackArgs<'a> {
+    pub namespace: &'a str,
+    pub kind: &'a str,
+    pub name: &'a str,
+    /// Target entry version to restore. None → restore the most recent history entry.
+    pub to_version: Option<i64>,
+    pub output: OutputMode,
+}
+
+pub async fn run(pool: &PgPool, args: RollbackArgs<'_>, master_key: &[u8; 32]) -> Result<()> {
+    // ── Find the target entry history snapshot ────────────────────────────────
+    #[derive(FromRow)]
+    struct EntryHistoryRow {
+        entry_id: Uuid,
+        version: i64,
+        action: String,
+        tags: Vec<String>,
+        metadata: Value,
+    }
+
+    let snap: Option<EntryHistoryRow> = if let Some(ver) = args.to_version {
+        sqlx::query_as(
+            "SELECT entry_id, version, action, tags, metadata \
+             FROM entries_history \
+             WHERE namespace = $1 AND kind = $2 AND name = $3 AND version = $4 \
+             ORDER BY id DESC LIMIT 1",
+        )
+        .bind(args.namespace)
+        .bind(args.kind)
+        .bind(args.name)
+        .bind(ver)
+        .fetch_optional(pool)
+        .await?
+    } else {
+        sqlx::query_as(
+            "SELECT entry_id, version, action, tags, metadata \
+             FROM entries_history \
+             WHERE namespace = $1 AND kind = $2 AND name = $3 \
+             ORDER BY id DESC LIMIT 1",
+        )
+        .bind(args.namespace)
+        .bind(args.kind)
+        .bind(args.name)
+        .fetch_optional(pool)
+        .await?
+    };
+
+    let snap = snap.ok_or_else(|| {
+        anyhow::anyhow!(
+            "No history found for [{}/{}] {}{}.",
+            args.namespace,
+            args.kind,
+            args.name,
+            args.to_version
+                .map(|v| format!(" at version {}", v))
+                .unwrap_or_default()
+        )
+    })?;
+
+    // ── Find the matching secret field snapshots ──────────────────────────────
+    #[derive(FromRow)]
+    struct SecretHistoryRow {
+        secret_id: Uuid,
+        field_name: String,
+        field_type: String,
+        value_len: i32,
+        encrypted: Vec<u8>,
+        action: String,
+    }
+
+    let field_snaps: Vec<SecretHistoryRow> = sqlx::query_as(
+        "SELECT secret_id, field_name, field_type, value_len, encrypted, action \
+         FROM secrets_history \
+         WHERE entry_id = $1 AND entry_version = $2 \
+         ORDER BY field_name",
+    )
+    .bind(snap.entry_id)
+    .bind(snap.version)
+    .fetch_all(pool)
+    .await?;
+
+    // Validate: try decrypting all encrypted fields before writing anything.
+    for f in &field_snaps {
+        if f.action != "delete" && !f.encrypted.is_empty() {
+            crypto::decrypt_json(master_key, &f.encrypted).map_err(|e| {
+                anyhow::anyhow!(
+                    "Cannot decrypt snapshot for field '{}': {}",
+                    f.field_name,
+                    e
+                )
+            })?;
+        }
+    }
+
+    let mut tx = pool.begin().await?;
+
+    // ── Snapshot the current live state before overwriting ────────────────────
+    #[derive(sqlx::FromRow)]
+    struct LiveEntry {
+        id: Uuid,
+        version: i64,
+        tags: Vec<String>,
+        metadata: Value,
+    }
+    let live: Option<LiveEntry> = sqlx::query_as(
+        "SELECT id, version, tags, metadata FROM entries \
+         WHERE namespace = $1 AND kind = $2 AND name = $3 FOR UPDATE",
+    )
+    .bind(args.namespace)
+    .bind(args.kind)
+    .bind(args.name)
+    .fetch_optional(&mut *tx)
+    .await?;
+
+    if let Some(ref lr) = live {
+        if let Err(e) = db::snapshot_entry_history(
+            &mut tx,
+            db::EntrySnapshotParams {
+                entry_id: lr.id,
+                namespace: args.namespace,
+                kind: args.kind,
+                name: args.name,
+                version: lr.version,
+                action: "rollback",
+                tags: &lr.tags,
+                metadata: &lr.metadata,
+            },
+        )
+        .await
+        {
+            tracing::warn!(error = %e, "failed to snapshot entry before rollback");
+        }
+
+        // Snapshot existing secret fields.
+        #[derive(sqlx::FromRow)]
+        struct LiveField {
+            id: Uuid,
+            field_name: String,
+            field_type: String,
+            value_len: i32,
+            encrypted: Vec<u8>,
+        }
+        let live_fields: Vec<LiveField> = sqlx::query_as(
+            "SELECT id, field_name, field_type, value_len, encrypted \
+             FROM secrets WHERE entry_id = $1",
+        )
+        .bind(lr.id)
+        .fetch_all(&mut *tx)
+        .await?;
+
+        for f in &live_fields {
+            if let Err(e) = db::snapshot_secret_history(
+                &mut tx,
+                db::SecretSnapshotParams {
+                    entry_id: lr.id,
+                    secret_id: f.id,
+                    entry_version: lr.version,
+                    field_name: &f.field_name,
+                    field_type: &f.field_type,
+                    value_len: f.value_len,
+                    encrypted: &f.encrypted,
+                    action: "rollback",
+                },
+            )
+            .await
+            {
+                tracing::warn!(error = %e, "failed to snapshot secret field before rollback");
+            }
+        }
+    }
+
+    // ── Restore entry row ─────────────────────────────────────────────────────
+    sqlx::query(
+        "INSERT INTO entries (id, namespace, kind, name, tags, metadata, version, updated_at) \
+         VALUES ($1, $2, $3, $4, $5, $6, $7, NOW()) \
+         ON CONFLICT (namespace, kind, name) DO UPDATE SET \
+             tags       = EXCLUDED.tags, \
+             metadata   = EXCLUDED.metadata, \
+             version    = entries.version + 1, \
+             updated_at = NOW()",
+    )
+    .bind(snap.entry_id)
+    .bind(args.namespace)
+    .bind(args.kind)
+    .bind(args.name)
+    .bind(&snap.tags)
+    .bind(&snap.metadata)
+    .bind(snap.version)
+    .execute(&mut *tx)
+    .await?;
+
+    // ── Restore secret fields ─────────────────────────────────────────────────
+    // Delete all current fields and re-insert from snapshot
+    // (only non-deleted fields from the snapshot are restored).
+    sqlx::query("DELETE FROM secrets WHERE entry_id = $1")
+        .bind(snap.entry_id)
+        .execute(&mut *tx)
+        .await?;
+
+    for f in &field_snaps {
+        if f.action == "delete" {
+            // Field was deleted at this snapshot point — don't restore it.
+            continue;
+        }
+        sqlx::query(
+            "INSERT INTO secrets (id, entry_id, field_name, field_type, value_len, encrypted) \
+             VALUES ($1, $2, $3, $4, $5, $6) \
+             ON CONFLICT (entry_id, field_name) DO UPDATE SET \
+                 field_type = EXCLUDED.field_type, \
+                 value_len  = EXCLUDED.value_len, \
+                 encrypted  = EXCLUDED.encrypted, \
+                 version    = secrets.version + 1, \
+                 updated_at = NOW()",
+        )
+        .bind(f.secret_id)
+        .bind(snap.entry_id)
+        .bind(&f.field_name)
+        .bind(&f.field_type)
+        .bind(f.value_len)
+        .bind(&f.encrypted)
+        .execute(&mut *tx)
+        .await?;
+    }
+
+    crate::audit::log_tx(
+        &mut tx,
+        "rollback",
+        args.namespace,
+        args.kind,
+        args.name,
+        json!({
+            "restored_version": snap.version,
+            "original_action": snap.action,
+        }),
+    )
+    .await;
+
+    tx.commit().await?;
+
+    let result_json = json!({
+        "action": "rolled_back",
+        "namespace": args.namespace,
+        "kind": args.kind,
+        "name": args.name,
+        "restored_version": snap.version,
+    });
+
+    match args.output {
+        OutputMode::Text => println!(
+            "Rolled back: [{}/{}] {} → version {}",
+            args.namespace, args.kind, args.name, snap.version
+        ),
+        ref mode => print_json(&result_json, mode)?,
+    }
+
+    Ok(())
+}

src/commands/run.rs

@@ -0,0 +1,143 @@
+use anyhow::Result;
+use serde_json::Value;
+use sqlx::PgPool;
+use std::collections::HashMap;
+
+use crate::commands::search::{build_injected_env_map, fetch_entries, fetch_secrets_for_entries};
+use crate::output::OutputMode;
+
+pub struct InjectArgs<'a> {
+    pub namespace: Option<&'a str>,
+    pub kind: Option<&'a str>,
+    pub name: Option<&'a str>,
+    pub tags: &'a [String],
+    pub prefix: &'a str,
+    pub output: OutputMode,
+}
+
+pub struct RunArgs<'a> {
+    pub namespace: Option<&'a str>,
+    pub kind: Option<&'a str>,
+    pub name: Option<&'a str>,
+    pub tags: &'a [String],
+    pub prefix: &'a str,
+    pub command: &'a [String],
+}
+
+/// Fetch entries matching the filter and build a flat env map (metadata + decrypted secrets).
+pub async fn collect_env_map(
+    pool: &PgPool,
+    namespace: Option<&str>,
+    kind: Option<&str>,
+    name: Option<&str>,
+    tags: &[String],
+    prefix: &str,
+    master_key: &[u8; 32],
+) -> Result<HashMap<String, String>> {
+    if namespace.is_none() && kind.is_none() && name.is_none() && tags.is_empty() {
+        anyhow::bail!(
+            "At least one filter (--namespace, --kind, --name, or --tag) is required for inject/run"
+        );
+    }
+    let entries = fetch_entries(pool, namespace, kind, name, tags, None).await?;
+    if entries.is_empty() {
+        anyhow::bail!("No records matched the given filters.");
+    }
+
+    let entry_ids: Vec<uuid::Uuid> = entries.iter().map(|e| e.id).collect();
+    let fields_map = fetch_secrets_for_entries(pool, &entry_ids).await?;
+
+    let mut map = HashMap::new();
+    for entry in &entries {
+        let empty = vec![];
+        let fields = fields_map.get(&entry.id).unwrap_or(&empty);
+        let row_map = build_injected_env_map(pool, entry, prefix, master_key, fields).await?;
+        for (k, v) in row_map {
+            map.insert(k, v);
+        }
+    }
+    Ok(map)
+}
+
+/// `inject` command: print env vars to stdout.
+pub async fn run_inject(pool: &PgPool, args: InjectArgs<'_>, master_key: &[u8; 32]) -> Result<()> {
+    let env_map = collect_env_map(
+        pool,
+        args.namespace,
+        args.kind,
+        args.name,
+        args.tags,
+        args.prefix,
+        master_key,
+    )
+    .await?;
+
+    match args.output {
+        OutputMode::Json => {
+            let obj: serde_json::Map<String, Value> = env_map
+                .into_iter()
+                .map(|(k, v)| (k, Value::String(v)))
+                .collect();
+            println!("{}", serde_json::to_string_pretty(&Value::Object(obj))?);
+        }
+        OutputMode::JsonCompact => {
+            let obj: serde_json::Map<String, Value> = env_map
+                .into_iter()
+                .map(|(k, v)| (k, Value::String(v)))
+                .collect();
+            println!("{}", serde_json::to_string(&Value::Object(obj))?);
+        }
+        _ => {
+            let mut pairs: Vec<(String, String)> = env_map.into_iter().collect();
+            pairs.sort_by(|a, b| a.0.cmp(&b.0));
+            for (k, v) in pairs {
+                println!("{}={}", k, shell_quote(&v));
+            }
+        }
+    }
+
+    Ok(())
+}
+
+/// `run` command: inject secrets into a child process environment and execute.
+pub async fn run_exec(pool: &PgPool, args: RunArgs<'_>, master_key: &[u8; 32]) -> Result<()> {
+    if args.command.is_empty() {
+        anyhow::bail!(
+            "No command specified. Usage: secrets run [filter flags] -- <command> [args]"
+        );
+    }
+
+    let env_map = collect_env_map(
+        pool,
+        args.namespace,
+        args.kind,
+        args.name,
+        args.tags,
+        args.prefix,
+        master_key,
+    )
+    .await?;
+
+    tracing::debug!(
+        vars = env_map.len(),
+        cmd = args.command[0].as_str(),
+        "injecting secrets into child process"
+    );
+
+    let status = std::process::Command::new(&args.command[0])
+        .args(&args.command[1..])
+        .envs(&env_map)
+        .status()
+        .map_err(|e| anyhow::anyhow!("Failed to execute '{}': {}", args.command[0], e))?;
+
+    if !status.success() {
+        let code = status.code().unwrap_or(1);
+        std::process::exit(code);
+    }
+
+    Ok(())
+}
+
+fn shell_quote(s: &str) -> String {
+    format!("'{}'", s.replace('\'', "'\\''"))
+}

src/commands/search.rs

@@ -1,17 +1,18 @@
 use anyhow::Result;
 use serde_json::{Value, json};
 use sqlx::PgPool;
+use std::collections::HashMap;
 
-use crate::models::Secret;
-use crate::output::OutputMode;
+use crate::crypto;
+use crate::models::{Entry, SecretField};
+use crate::output::{OutputMode, format_local_time};
 
 pub struct SearchArgs<'a> {
     pub namespace: Option<&'a str>,
     pub kind: Option<&'a str>,
     pub name: Option<&'a str>,
-    pub tag: Option<&'a str>,
+    pub tags: &'a [String],
     pub query: Option<&'a str>,
-    pub show_secrets: bool,
     pub fields: &'a [String],
     pub summary: bool,
     pub limit: u32,
@@ -21,85 +22,41 @@ pub struct SearchArgs<'a> {
 }
 
 pub async fn run(pool: &PgPool, args: SearchArgs<'_>) -> Result<()> {
-    let mut conditions: Vec<String> = Vec::new();
-    let mut idx: i32 = 1;
+    validate_safe_search_args(args.fields)?;
 
-    if args.namespace.is_some() {
-        conditions.push(format!("namespace = ${}", idx));
-        idx += 1;
-    }
-    if args.kind.is_some() {
-        conditions.push(format!("kind = ${}", idx));
-        idx += 1;
-    }
-    if args.name.is_some() {
-        conditions.push(format!("name = ${}", idx));
-        idx += 1;
-    }
-    if args.tag.is_some() {
-        conditions.push(format!("tags @> ARRAY[${}]", idx));
-        idx += 1;
-    }
-    if args.query.is_some() {
-        conditions.push(format!(
-            "(name ILIKE ${i} OR namespace ILIKE ${i} OR kind ILIKE ${i} OR metadata::text ILIKE ${i} OR EXISTS (SELECT 1 FROM unnest(tags) t WHERE t ILIKE ${i}))",
-            i = idx
-        ));
-        idx += 1;
-    }
+    let rows = fetch_entries_paged(
+        pool,
+        PagedFetchArgs {
+            namespace: args.namespace,
+            kind: args.kind,
+            name: args.name,
+            tags: args.tags,
+            query: args.query,
+            sort: args.sort,
+            limit: args.limit,
+            offset: args.offset,
+        },
+    )
+    .await?;
 
-    let where_clause = if conditions.is_empty() {
-        String::new()
-    } else {
-        format!("WHERE {}", conditions.join(" AND "))
-    };
-
-    let order = match args.sort {
-        "updated" => "updated_at DESC",
-        "created" => "created_at DESC",
-        _ => "namespace, kind, name",
-    };
-
-    let sql = format!(
-        "SELECT * FROM secrets {} ORDER BY {} LIMIT ${} OFFSET ${}",
-        where_clause,
-        order,
-        idx,
-        idx + 1
-    );
-
-    tracing::debug!(sql, "executing search query");
-
-    let mut q = sqlx::query_as::<_, Secret>(&sql);
-    if let Some(v) = args.namespace {
-        q = q.bind(v);
-    }
-    if let Some(v) = args.kind {
-        q = q.bind(v);
-    }
-    if let Some(v) = args.name {
-        q = q.bind(v);
-    }
-    if let Some(v) = args.tag {
-        q = q.bind(v);
-    }
-    if let Some(v) = args.query {
-        q = q.bind(format!("%{}%", v));
-    }
-    q = q.bind(args.limit as i64).bind(args.offset as i64);
-
-    let rows = q.fetch_all(pool).await?;
-
-    // -f/--field: extract specific field values directly
+    // -f/--field: extract specific metadata field values directly
     if !args.fields.is_empty() {
         return print_fields(&rows, args.fields);
     }
 
+    // Fetch secret schemas for all returned entries (no master key needed).
+    let entry_ids: Vec<uuid::Uuid> = rows.iter().map(|r| r.id).collect();
+    let schema_map = if !args.summary && !entry_ids.is_empty() {
+        fetch_secret_schemas(pool, &entry_ids).await?
+    } else {
+        HashMap::new()
+    };
+
     match args.output {
         OutputMode::Json | OutputMode::JsonCompact => {
             let arr: Vec<Value> = rows
                 .iter()
-                .map(|r| to_json(r, args.show_secrets, args.summary))
+                .map(|r| to_json(r, args.summary, schema_map.get(&r.id).map(Vec::as_slice)))
                 .collect();
             let out = if args.output == OutputMode::Json {
                 serde_json::to_string_pretty(&arr)?
@@ -108,26 +65,17 @@ pub async fn run(pool: &PgPool, args: SearchArgs<'_>) -> Result<()> {
             };
             println!("{}", out);
         }
-        OutputMode::Env => {
-            if rows.len() > 1 {
-                anyhow::bail!(
-                    "env output requires exactly one record; got {}. Add more filters.",
-                    rows.len()
-                );
-            }
-            if let Some(row) = rows.first() {
-                print_env(row, args.show_secrets)?;
-            } else {
-                eprintln!("No records found.");
-            }
-        }
         OutputMode::Text => {
             if rows.is_empty() {
                 println!("No records found.");
                 return Ok(());
             }
             for row in &rows {
-                print_text(row, args.show_secrets, args.summary)?;
+                print_text(
+                    row,
+                    args.summary,
+                    schema_map.get(&row.id).map(Vec::as_slice),
+                )?;
             }
             println!("{} record(s) found.", rows.len());
             if rows.len() == args.limit as usize {
@@ -143,123 +91,407 @@ pub async fn run(pool: &PgPool, args: SearchArgs<'_>) -> Result<()> {
     Ok(())
 }
 
-fn to_json(row: &Secret, show_secrets: bool, summary: bool) -> Value {
+fn validate_safe_search_args(fields: &[String]) -> Result<()> {
+    if let Some(field) = fields.iter().find(|field| is_secret_field(field)) {
+        anyhow::bail!(
+            "Field '{}' is sensitive. `search -f` only supports metadata.* fields; use `secrets inject` or `secrets run` for secrets.",
+            field
+        );
+    }
+    Ok(())
+}
+
+fn is_secret_field(field: &str) -> bool {
+    matches!(
+        field.split_once('.').map(|(section, _)| section),
+        Some("secret" | "secrets" | "encrypted")
+    )
+}
+
+// ── Entry fetching ────────────────────────────────────────────────────────────
+
+struct PagedFetchArgs<'a> {
+    namespace: Option<&'a str>,
+    kind: Option<&'a str>,
+    name: Option<&'a str>,
+    tags: &'a [String],
+    query: Option<&'a str>,
+    sort: &'a str,
+    limit: u32,
+    offset: u32,
+}
+
+/// A very large limit used when callers need all matching records (export, inject, run).
+/// Postgres will stop scanning when this many rows are found; adjust if needed.
+pub const FETCH_ALL_LIMIT: u32 = 100_000;
+
+/// Fetch entries matching the given filters (used by search, inject, run).
+/// `limit` caps the result set; pass `FETCH_ALL_LIMIT` when you need all matching records.
+pub async fn fetch_entries(
+    pool: &PgPool,
+    namespace: Option<&str>,
+    kind: Option<&str>,
+    name: Option<&str>,
+    tags: &[String],
+    query: Option<&str>,
+) -> Result<Vec<Entry>> {
+    fetch_entries_with_limit(pool, namespace, kind, name, tags, query, FETCH_ALL_LIMIT).await
+}
+
+/// Like `fetch_entries` but with an explicit limit. Used internally by `search`.
+pub(crate) async fn fetch_entries_with_limit(
+    pool: &PgPool,
+    namespace: Option<&str>,
+    kind: Option<&str>,
+    name: Option<&str>,
+    tags: &[String],
+    query: Option<&str>,
+    limit: u32,
+) -> Result<Vec<Entry>> {
+    fetch_entries_paged(
+        pool,
+        PagedFetchArgs {
+            namespace,
+            kind,
+            name,
+            tags,
+            query,
+            sort: "name",
+            limit,
+            offset: 0,
+        },
+    )
+    .await
+}
+
+async fn fetch_entries_paged(pool: &PgPool, a: PagedFetchArgs<'_>) -> Result<Vec<Entry>> {
+    let mut conditions: Vec<String> = Vec::new();
+    let mut idx: i32 = 1;
+
+    if a.namespace.is_some() {
+        conditions.push(format!("namespace = ${}", idx));
+        idx += 1;
+    }
+    if a.kind.is_some() {
+        conditions.push(format!("kind = ${}", idx));
+        idx += 1;
+    }
+    if a.name.is_some() {
+        conditions.push(format!("name = ${}", idx));
+        idx += 1;
+    }
+    if !a.tags.is_empty() {
+        let placeholders: Vec<String> = a
+            .tags
+            .iter()
+            .map(|_| {
+                let p = format!("${}", idx);
+                idx += 1;
+                p
+            })
+            .collect();
+        conditions.push(format!("tags @> ARRAY[{}]", placeholders.join(", ")));
+    }
+    if a.query.is_some() {
+        conditions.push(format!(
+            "(name ILIKE ${i} ESCAPE '\\' OR namespace ILIKE ${i} ESCAPE '\\' OR kind ILIKE ${i} ESCAPE '\\' OR metadata::text ILIKE ${i} ESCAPE '\\' OR EXISTS (SELECT 1 FROM unnest(tags) t WHERE t ILIKE ${i} ESCAPE '\\'))",
+            i = idx
+        ));
+        idx += 1;
+    }
+
+    let where_clause = if conditions.is_empty() {
+        String::new()
+    } else {
+        format!("WHERE {}", conditions.join(" AND "))
+    };
+
+    let order = match a.sort {
+        "updated" => "updated_at DESC",
+        "created" => "created_at DESC",
+        _ => "namespace, kind, name",
+    };
+
+    let sql = format!(
+        "SELECT * FROM entries {} ORDER BY {} LIMIT ${} OFFSET ${}",
+        where_clause,
+        order,
+        idx,
+        idx + 1
+    );
+
+    tracing::debug!(sql, "executing search query");
+
+    let mut q = sqlx::query_as::<_, Entry>(&sql);
+    if let Some(v) = a.namespace {
+        q = q.bind(v);
+    }
+    if let Some(v) = a.kind {
+        q = q.bind(v);
+    }
+    if let Some(v) = a.name {
+        q = q.bind(v);
+    }
+    for v in a.tags {
+        q = q.bind(v.as_str());
+    }
+    if let Some(v) = a.query {
+        q = q.bind(format!(
+            "%{}%",
+            v.replace('\\', "\\\\")
+                .replace('%', "\\%")
+                .replace('_', "\\_")
+        ));
+    }
+    q = q.bind(a.limit as i64).bind(a.offset as i64);
+
+    Ok(q.fetch_all(pool).await?)
+}
+
+// ── Secret schema fetching (no master key) ───────────────────────────────────
+
+/// Fetch secret field schemas (field_name, field_type, value_len) for a set of entry ids.
+/// Returns a map from entry_id to list of SecretField (encrypted field not used here).
+async fn fetch_secret_schemas(
+    pool: &PgPool,
+    entry_ids: &[uuid::Uuid],
+) -> Result<HashMap<uuid::Uuid, Vec<SecretField>>> {
+    if entry_ids.is_empty() {
+        return Ok(HashMap::new());
+    }
+
+    let fields: Vec<SecretField> = sqlx::query_as(
+        "SELECT * FROM secrets WHERE entry_id = ANY($1) ORDER BY entry_id, field_name",
+    )
+    .bind(entry_ids)
+    .fetch_all(pool)
+    .await?;
+
+    let mut map: HashMap<uuid::Uuid, Vec<SecretField>> = HashMap::new();
+    for f in fields {
+        map.entry(f.entry_id).or_default().push(f);
+    }
+    Ok(map)
+}
+
+/// Fetch all secret fields (including encrypted bytes) for a set of entry ids.
+pub async fn fetch_secrets_for_entries(
+    pool: &PgPool,
+    entry_ids: &[uuid::Uuid],
+) -> Result<HashMap<uuid::Uuid, Vec<SecretField>>> {
+    if entry_ids.is_empty() {
+        return Ok(HashMap::new());
+    }
+
+    let fields: Vec<SecretField> = sqlx::query_as(
+        "SELECT * FROM secrets WHERE entry_id = ANY($1) ORDER BY entry_id, field_name",
+    )
+    .bind(entry_ids)
+    .fetch_all(pool)
+    .await?;
+
+    let mut map: HashMap<uuid::Uuid, Vec<SecretField>> = HashMap::new();
+    for f in fields {
+        map.entry(f.entry_id).or_default().push(f);
+    }
+    Ok(map)
+}
+
+// ── Display helpers ───────────────────────────────────────────────────────────
+
+fn env_prefix(entry: &Entry, prefix: &str) -> String {
+    let name_part = entry.name.to_uppercase().replace(['-', '.', ' '], "_");
+    if prefix.is_empty() {
+        name_part
+    } else {
+        format!(
+            "{}_{}",
+            prefix.to_uppercase().replace(['-', '.', ' '], "_"),
+            name_part
+        )
+    }
+}
+
+/// Build a flat KEY=VALUE map from metadata only (no master key required).
+pub fn build_metadata_env_map(entry: &Entry, prefix: &str) -> HashMap<String, String> {
+    let effective_prefix = env_prefix(entry, prefix);
+    let mut map = HashMap::new();
+
+    if let Some(meta) = entry.metadata.as_object() {
+        for (k, v) in meta {
+            let key = format!(
+                "{}_{}",
+                effective_prefix,
+                k.to_uppercase().replace(['-', '.'], "_")
+            );
+            map.insert(key, json_value_to_env_string(v));
+        }
+    }
+    map
+}
+
+/// Build a flat KEY=VALUE map from metadata + decrypted secret fields.
+/// Resolves key_ref: if metadata.key_ref is set, merges secret fields from that key entry.
+pub async fn build_injected_env_map(
+    pool: &PgPool,
+    entry: &Entry,
+    prefix: &str,
+    master_key: &[u8; 32],
+    fields: &[SecretField],
+) -> Result<HashMap<String, String>> {
+    let effective_prefix = env_prefix(entry, prefix);
+    let mut map = build_metadata_env_map(entry, prefix);
+
+    // Decrypt each secret field and add to env map.
+    for f in fields {
+        let decrypted = crypto::decrypt_json(master_key, &f.encrypted)?;
+        let key = format!(
+            "{}_{}",
+            effective_prefix,
+            f.field_name.to_uppercase().replace(['-', '.'], "_")
+        );
+        map.insert(key, json_value_to_env_string(&decrypted));
+    }
+
+    // Resolve key_ref: merge secrets from the referenced key entry.
+    if let Some(key_ref) = entry.metadata.get("key_ref").and_then(|v| v.as_str()) {
+        let key_entries = fetch_entries(
+            pool,
+            Some(&entry.namespace),
+            Some("key"),
+            Some(key_ref),
+            &[],
+            None,
+        )
+        .await?;
+
+        if let Some(key_entry) = key_entries.first() {
+            let key_ids = vec![key_entry.id];
+            let key_fields_map = fetch_secrets_for_entries(pool, &key_ids).await?;
+            let empty = vec![];
+            let key_fields = key_fields_map.get(&key_entry.id).unwrap_or(&empty);
+
+            let key_prefix = env_prefix(key_entry, prefix);
+            for f in key_fields {
+                let decrypted = crypto::decrypt_json(master_key, &f.encrypted)?;
+                let key_var = format!(
+                    "{}_{}",
+                    key_prefix,
+                    f.field_name.to_uppercase().replace(['-', '.'], "_")
+                );
+                map.insert(key_var, json_value_to_env_string(&decrypted));
+            }
+        } else {
+            tracing::warn!(key_ref, "key_ref target not found");
+        }
+    }
+
+    Ok(map)
+}
+
+fn json_value_to_env_string(v: &Value) -> String {
+    match v {
+        Value::String(s) => s.clone(),
+        Value::Null => String::new(),
+        other => other.to_string(),
+    }
+}
+
+fn to_json(entry: &Entry, summary: bool, schema: Option<&[SecretField]>) -> Value {
     if summary {
-        let desc = row
+        let desc = entry
             .metadata
             .get("desc")
-            .or_else(|| row.metadata.get("url"))
+            .or_else(|| entry.metadata.get("url"))
             .and_then(|v| v.as_str())
             .unwrap_or("")
             .to_string();
         return json!({
-            "namespace": row.namespace,
-            "kind": row.kind,
-            "name": row.name,
-            "tags": row.tags,
+            "namespace": entry.namespace,
+            "kind": entry.kind,
+            "name": entry.name,
+            "tags": entry.tags,
             "desc": desc,
-            "updated_at": row.updated_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
+            "updated_at": entry.updated_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
         });
     }
 
-    let secrets_val = if show_secrets {
-        row.encrypted.clone()
-    } else {
-        let keys: Vec<&str> = row
-            .encrypted
-            .as_object()
-            .map(|m| m.keys().map(|k| k.as_str()).collect())
-            .unwrap_or_default();
-        json!({"_hidden_keys": keys})
+    let secrets_val: Value = match schema {
+        Some(fields) if !fields.is_empty() => {
+            let schema_arr: Vec<Value> = fields
+                .iter()
+                .map(|f| {
+                    json!({
+                        "field_name": f.field_name,
+                        "field_type": f.field_type,
+                        "value_len": f.value_len,
+                    })
+                })
+                .collect();
+            Value::Array(schema_arr)
+        }
+        _ => Value::Array(vec![]),
     };
 
     json!({
-        "id": row.id,
-        "namespace": row.namespace,
-        "kind": row.kind,
-        "name": row.name,
-        "tags": row.tags,
-        "metadata": row.metadata,
+        "id": entry.id,
+        "namespace": entry.namespace,
+        "kind": entry.kind,
+        "name": entry.name,
+        "tags": entry.tags,
+        "metadata": entry.metadata,
         "secrets": secrets_val,
-        "created_at": row.created_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
-        "updated_at": row.updated_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
+        "version": entry.version,
+        "created_at": entry.created_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
+        "updated_at": entry.updated_at.format("%Y-%m-%dT%H:%M:%SZ").to_string(),
     })
 }
 
-fn print_text(row: &Secret, show_secrets: bool, summary: bool) -> Result<()> {
-    println!("[{}/{}] {}", row.namespace, row.kind, row.name);
+fn print_text(entry: &Entry, summary: bool, schema: Option<&[SecretField]>) -> Result<()> {
+    println!("[{}/{}] {}", entry.namespace, entry.kind, entry.name);
     if summary {
-        let desc = row
+        let desc = entry
             .metadata
             .get("desc")
-            .or_else(|| row.metadata.get("url"))
+            .or_else(|| entry.metadata.get("url"))
             .and_then(|v| v.as_str())
             .unwrap_or("-");
-        if !row.tags.is_empty() {
-            println!("  tags:    [{}]", row.tags.join(", "));
+        if !entry.tags.is_empty() {
+            println!("  tags:    [{}]", entry.tags.join(", "));
         }
         println!("  desc:    {}", desc);
-        println!(
-            "  updated: {}",
-            row.updated_at.format("%Y-%m-%d %H:%M:%S UTC")
-        );
+        println!("  updated: {}", format_local_time(entry.updated_at));
     } else {
-        println!("  id:       {}", row.id);
-        if !row.tags.is_empty() {
-            println!("  tags:     [{}]", row.tags.join(", "));
+        println!("  id:       {}", entry.id);
+        if !entry.tags.is_empty() {
+            println!("  tags:     [{}]", entry.tags.join(", "));
         }
-        if row.metadata.as_object().is_some_and(|m| !m.is_empty()) {
+        if entry.metadata.as_object().is_some_and(|m| !m.is_empty()) {
             println!(
                 "  metadata: {}",
-                serde_json::to_string_pretty(&row.metadata)?
+                serde_json::to_string_pretty(&entry.metadata)?
             );
         }
-        if show_secrets {
-            println!(
-                "  secrets:  {}",
-                serde_json::to_string_pretty(&row.encrypted)?
-            );
-        } else {
-            let keys: Vec<String> = row
-                .encrypted
-                .as_object()
-                .map(|m| m.keys().cloned().collect())
-                .unwrap_or_default();
-            if !keys.is_empty() {
-                println!(
-                    "  secrets:  [{}]  (--show-secrets to reveal)",
-                    keys.join(", ")
-                );
+        match schema {
+            Some(fields) if !fields.is_empty() => {
+                let schema_str: Vec<String> = fields
+                    .iter()
+                    .map(|f| format!("{}: {}({})", f.field_name, f.field_type, f.value_len))
+                    .collect();
+                println!("  secrets:  {}", schema_str.join(", "));
+                println!("            (use `secrets inject` or `secrets run` to get values)");
             }
+            _ => {}
         }
-        println!(
-            "  created:  {}",
-            row.created_at.format("%Y-%m-%d %H:%M:%S UTC")
-        );
+        println!("  version:  {}", entry.version);
+        println!("  created:  {}", format_local_time(entry.created_at));
     }
     println!();
     Ok(())
 }
 
-fn print_env(row: &Secret, show_secrets: bool) -> Result<()> {
-    let prefix = row.name.to_uppercase().replace(['-', '.'], "_");
-    if let Some(meta) = row.metadata.as_object() {
-        for (k, v) in meta {
-            let key = format!("{}_{}", prefix, k.to_uppercase().replace('-', "_"));
-            println!("{}={}", key, v.as_str().unwrap_or(&v.to_string()));
-        }
-    }
-    if show_secrets && let Some(enc) = row.encrypted.as_object() {
-        for (k, v) in enc {
-            let key = format!("{}_{}", prefix, k.to_uppercase().replace('-', "_"));
-            println!("{}={}", key, v.as_str().unwrap_or(&v.to_string()));
-        }
-    }
-    Ok(())
-}
-
-/// Extract one or more field paths like `metadata.url` or `secret.token`.
-fn print_fields(rows: &[Secret], fields: &[String]) -> Result<()> {
+/// Extract one or more metadata field paths like `metadata.url`.
+fn print_fields(rows: &[Entry], fields: &[String]) -> Result<()> {
     for row in rows {
         for field in fields {
             let val = extract_field(row, field)?;
@@ -269,21 +501,14 @@ fn print_fields(rows: &[Secret], fields: &[String]) -> Result<()> {
     Ok(())
 }
 
-fn extract_field(row: &Secret, field: &str) -> Result<String> {
-    let (section, key) = field.split_once('.').ok_or_else(|| {
-        anyhow::anyhow!(
-            "Invalid field path '{}'. Use metadata.<key> or secret.<key>",
-            field
-        )
-    })?;
+fn extract_field(entry: &Entry, field: &str) -> Result<String> {
+    let (section, key) = field
+        .split_once('.')
+        .ok_or_else(|| anyhow::anyhow!("Invalid field path '{}'. Use metadata.<key>.", field))?;
 
     let obj = match section {
-        "metadata" | "meta" => &row.metadata,
-        "secret" | "secrets" | "encrypted" => &row.encrypted,
-        other => anyhow::bail!(
-            "Unknown field section '{}'. Use 'metadata' or 'secret'",
-            other
-        ),
+        "metadata" | "meta" => &entry.metadata,
+        other => anyhow::bail!("Unknown field section '{}'. Use 'metadata'.", other),
     };
 
     obj.get(key)
@@ -296,9 +521,91 @@ fn extract_field(row: &Secret, field: &str) -> Result<String> {
             anyhow::anyhow!(
                 "Field '{}' not found in record [{}/{}/{}]",
                 field,
-                row.namespace,
-                row.kind,
-                row.name
+                entry.namespace,
+                entry.kind,
+                entry.name
             )
         })
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use chrono::Utc;
+    use serde_json::json;
+    use uuid::Uuid;
+
+    fn sample_entry() -> Entry {
+        Entry {
+            id: Uuid::nil(),
+            namespace: "refining".to_string(),
+            kind: "service".to_string(),
+            name: "gitea.main".to_string(),
+            tags: vec!["prod".to_string()],
+            metadata: json!({"url": "https://code.example.com", "enabled": true}),
+            version: 1,
+            created_at: Utc::now(),
+            updated_at: Utc::now(),
+        }
+    }
+
+    fn sample_fields() -> Vec<SecretField> {
+        let key = [0x42u8; 32];
+        let enc = crypto::encrypt_json(&key, &json!("abc123")).unwrap();
+        vec![SecretField {
+            id: Uuid::nil(),
+            entry_id: Uuid::nil(),
+            field_name: "token".to_string(),
+            field_type: "string".to_string(),
+            value_len: 6,
+            encrypted: enc,
+            version: 1,
+            created_at: Utc::now(),
+            updated_at: Utc::now(),
+        }]
+    }
+
+    #[test]
+    fn rejects_secret_field_extraction() {
+        let fields = vec!["secret.token".to_string()];
+        let err = validate_safe_search_args(&fields).unwrap_err();
+        assert!(err.to_string().contains("sensitive"));
+    }
+
+    #[test]
+    fn metadata_env_map_excludes_secret_values() {
+        let entry = sample_entry();
+        let map = build_metadata_env_map(&entry, "");
+
+        assert_eq!(
+            map.get("GITEA_MAIN_URL").map(String::as_str),
+            Some("https://code.example.com")
+        );
+        assert_eq!(
+            map.get("GITEA_MAIN_ENABLED").map(String::as_str),
+            Some("true")
+        );
+        assert!(!map.contains_key("GITEA_MAIN_TOKEN"));
+    }
+
+    #[test]
+    fn to_json_full_includes_secrets_schema() {
+        let entry = sample_entry();
+        let fields = sample_fields();
+        let v = to_json(&entry, false, Some(&fields));
+
+        let secrets = v.get("secrets").unwrap().as_array().unwrap();
+        assert_eq!(secrets.len(), 1);
+        assert_eq!(secrets[0]["field_name"], "token");
+        assert_eq!(secrets[0]["field_type"], "string");
+        assert_eq!(secrets[0]["value_len"], 6);
+    }
+
+    #[test]
+    fn to_json_summary_omits_secrets_schema() {
+        let entry = sample_entry();
+        let fields = sample_fields();
+        let v = to_json(&entry, true, Some(&fields));
+        assert!(v.get("secrets").is_none());
+    }
+}

src/commands/update.rs

@@ -1,17 +1,16 @@
 use anyhow::Result;
 use serde_json::{Map, Value, json};
-use sqlx::{FromRow, PgPool};
+use sqlx::PgPool;
 use uuid::Uuid;
 
-use super::add::parse_kv;
-
-#[derive(FromRow)]
-struct UpdateRow {
-    id: Uuid,
-    tags: Vec<String>,
-    metadata: Value,
-    encrypted: Value,
-}
+use super::add::{
+    collect_field_paths, collect_key_paths, compute_value_len, flatten_json_fields,
+    infer_field_type, insert_path, parse_key_path, parse_kv, remove_path,
+};
+use crate::crypto;
+use crate::db;
+use crate::models::EntryRow;
+use crate::output::{OutputMode, print_json};
 
 pub struct UpdateArgs<'a> {
     pub namespace: &'a str,
@@ -23,20 +22,22 @@ pub struct UpdateArgs<'a> {
     pub remove_meta: &'a [String],
     pub secret_entries: &'a [String],
     pub remove_secrets: &'a [String],
+    pub output: OutputMode,
 }
 
-pub async fn run(pool: &PgPool, args: UpdateArgs<'_>) -> Result<()> {
-    let row: Option<UpdateRow> = sqlx::query_as(
-        r#"
-        SELECT id, tags, metadata, encrypted
-        FROM secrets
-        WHERE namespace = $1 AND kind = $2 AND name = $3
-        "#,
+pub async fn run(pool: &PgPool, args: UpdateArgs<'_>, master_key: &[u8; 32]) -> Result<()> {
+    let mut tx = pool.begin().await?;
+
+    let row: Option<EntryRow> = sqlx::query_as(
+        "SELECT id, version, tags, metadata \
+         FROM entries \
+         WHERE namespace = $1 AND kind = $2 AND name = $3 \
+         FOR UPDATE",
     )
     .bind(args.namespace)
     .bind(args.kind)
     .bind(args.name)
-    .fetch_optional(pool)
+    .fetch_optional(&mut *tx)
     .await?;
 
     let row = row.ok_or_else(|| {
@@ -48,7 +49,26 @@ pub async fn run(pool: &PgPool, args: UpdateArgs<'_>) -> Result<()> {
         )
     })?;
 
-    // Merge tags
+    // Snapshot current entry state before modifying.
+    if let Err(e) = db::snapshot_entry_history(
+        &mut tx,
+        db::EntrySnapshotParams {
+            entry_id: row.id,
+            namespace: args.namespace,
+            kind: args.kind,
+            name: args.name,
+            version: row.version,
+            action: "update",
+            tags: &row.tags,
+            metadata: &row.metadata,
+        },
+    )
+    .await
+    {
+        tracing::warn!(error = %e, "failed to snapshot entry history before update");
+    }
+
+    // ── Merge tags ────────────────────────────────────────────────────────────
     let mut tags: Vec<String> = row.tags;
     for t in args.add_tags {
         if !tags.contains(t) {
@@ -57,68 +77,175 @@ pub async fn run(pool: &PgPool, args: UpdateArgs<'_>) -> Result<()> {
     }
     tags.retain(|t| !args.remove_tags.contains(t));
 
-    // Merge metadata
+    // ── Merge metadata ────────────────────────────────────────────────────────
     let mut meta_map: Map<String, Value> = match row.metadata {
         Value::Object(m) => m,
         _ => Map::new(),
     };
     for entry in args.meta_entries {
-        let (key, value) = parse_kv(entry)?;
-        meta_map.insert(key, Value::String(value));
+        let (path, value) = parse_kv(entry)?;
+        insert_path(&mut meta_map, &path, value)?;
     }
     for key in args.remove_meta {
-        meta_map.remove(key);
+        let path = parse_key_path(key)?;
+        remove_path(&mut meta_map, &path)?;
     }
     let metadata = Value::Object(meta_map);
 
-    // Merge encrypted
-    let mut enc_map: Map<String, Value> = match row.encrypted {
-        Value::Object(m) => m,
-        _ => Map::new(),
-    };
-    for entry in args.secret_entries {
-        let (key, value) = parse_kv(entry)?;
-        enc_map.insert(key, Value::String(value));
-    }
-    for key in args.remove_secrets {
-        enc_map.remove(key);
-    }
-    let encrypted = Value::Object(enc_map);
-
-    tracing::debug!(
-        namespace = args.namespace,
-        kind = args.kind,
-        name = args.name,
-        "updating record"
-    );
-
-    sqlx::query(
-        r#"
-        UPDATE secrets
-        SET tags = $1, metadata = $2, encrypted = $3, updated_at = NOW()
-        WHERE id = $4
-        "#,
+    // CAS update of the entry row.
+    let result = sqlx::query(
+        "UPDATE entries \
+         SET tags = $1, metadata = $2, version = version + 1, updated_at = NOW() \
+         WHERE id = $3 AND version = $4",
     )
     .bind(&tags)
-    .bind(metadata)
-    .bind(encrypted)
+    .bind(&metadata)
     .bind(row.id)
-    .execute(pool)
+    .bind(row.version)
+    .execute(&mut *tx)
     .await?;
 
-    let meta_keys: Vec<&str> = args
-        .meta_entries
-        .iter()
-        .filter_map(|s| s.split_once('=').map(|(k, _)| k))
-        .collect();
-    let secret_keys: Vec<&str> = args
-        .secret_entries
-        .iter()
-        .filter_map(|s| s.split_once('=').map(|(k, _)| k))
-        .collect();
+    if result.rows_affected() == 0 {
+        tx.rollback().await?;
+        anyhow::bail!(
+            "Concurrent modification detected for [{}/{}] {}. Please retry.",
+            args.namespace,
+            args.kind,
+            args.name
+        );
+    }
 
-    crate::audit::log(
-        pool,
+    let new_version = row.version + 1;
+
+    // ── Update secret fields ──────────────────────────────────────────────────
+    for entry in args.secret_entries {
+        let (path, field_value) = parse_kv(entry)?;
+
+        // For nested paths (e.g. credentials:type), flatten into dot-separated names
+        // and treat the sub-value as the individual field to store.
+        let flat = flatten_json_fields("", &{
+            let mut m = Map::new();
+            insert_path(&mut m, &path, field_value)?;
+            Value::Object(m)
+        });
+
+        for (field_name, fv) in &flat {
+            let field_type = infer_field_type(fv);
+            let value_len = compute_value_len(fv);
+            let encrypted = crypto::encrypt_json(master_key, fv)?;
+
+            // Snapshot existing field before replacing.
+            #[derive(sqlx::FromRow)]
+            struct ExistingField {
+                id: Uuid,
+                field_type: String,
+                value_len: i32,
+                encrypted: Vec<u8>,
+            }
+            let existing_field: Option<ExistingField> = sqlx::query_as(
+                "SELECT id, field_type, value_len, encrypted \
+                 FROM secrets WHERE entry_id = $1 AND field_name = $2",
+            )
+            .bind(row.id)
+            .bind(field_name)
+            .fetch_optional(&mut *tx)
+            .await?;
+
+            if let Some(ef) = &existing_field
+                && let Err(e) = db::snapshot_secret_history(
+                    &mut tx,
+                    db::SecretSnapshotParams {
+                        entry_id: row.id,
+                        secret_id: ef.id,
+                        entry_version: row.version,
+                        field_name,
+                        field_type: &ef.field_type,
+                        value_len: ef.value_len,
+                        encrypted: &ef.encrypted,
+                        action: "update",
+                    },
+                )
+                .await
+            {
+                tracing::warn!(error = %e, "failed to snapshot secret field history");
+            }
+
+            sqlx::query(
+                "INSERT INTO secrets (entry_id, field_name, field_type, value_len, encrypted) \
+                 VALUES ($1, $2, $3, $4, $5) \
+                 ON CONFLICT (entry_id, field_name) DO UPDATE SET \
+                     field_type = EXCLUDED.field_type, \
+                     value_len  = EXCLUDED.value_len, \
+                     encrypted  = EXCLUDED.encrypted, \
+                     version    = secrets.version + 1, \
+                     updated_at = NOW()",
+            )
+            .bind(row.id)
+            .bind(field_name)
+            .bind(field_type)
+            .bind(value_len)
+            .bind(&encrypted)
+            .execute(&mut *tx)
+            .await?;
+        }
+    }
+
+    // ── Remove secret fields ──────────────────────────────────────────────────
+    for key in args.remove_secrets {
+        let path = parse_key_path(key)?;
+        // Dot-join the path to match flattened field_name storage.
+        let field_name = path.join(".");
+
+        // Snapshot before delete.
+        #[derive(sqlx::FromRow)]
+        struct FieldToDelete {
+            id: Uuid,
+            field_type: String,
+            value_len: i32,
+            encrypted: Vec<u8>,
+        }
+        let field: Option<FieldToDelete> = sqlx::query_as(
+            "SELECT id, field_type, value_len, encrypted \
+             FROM secrets WHERE entry_id = $1 AND field_name = $2",
+        )
+        .bind(row.id)
+        .bind(&field_name)
+        .fetch_optional(&mut *tx)
+        .await?;
+
+        if let Some(f) = field {
+            if let Err(e) = db::snapshot_secret_history(
+                &mut tx,
+                db::SecretSnapshotParams {
+                    entry_id: row.id,
+                    secret_id: f.id,
+                    entry_version: new_version,
+                    field_name: &field_name,
+                    field_type: &f.field_type,
+                    value_len: f.value_len,
+                    encrypted: &f.encrypted,
+                    action: "delete",
+                },
+            )
+            .await
+            {
+                tracing::warn!(error = %e, "failed to snapshot secret field history before delete");
+            }
+
+            sqlx::query("DELETE FROM secrets WHERE id = $1")
+                .bind(f.id)
+                .execute(&mut *tx)
+                .await?;
+        }
+    }
+
+    let meta_keys = collect_key_paths(args.meta_entries)?;
+    let remove_meta_keys = collect_field_paths(args.remove_meta)?;
+    let secret_keys = collect_key_paths(args.secret_entries)?;
+    let remove_secret_keys = collect_field_paths(args.remove_secrets)?;
+
+    crate::audit::log_tx(
+        &mut tx,
         "update",
         args.namespace,
         args.kind,
@@ -127,15 +254,34 @@ pub async fn run(pool: &PgPool, args: UpdateArgs<'_>) -> Result<()> {
             "add_tags": args.add_tags,
             "remove_tags": args.remove_tags,
             "meta_keys": meta_keys,
-            "remove_meta": args.remove_meta,
+            "remove_meta": remove_meta_keys,
             "secret_keys": secret_keys,
-            "remove_secrets": args.remove_secrets,
+            "remove_secrets": remove_secret_keys,
         }),
     )
     .await;
 
-    println!("Updated: [{}/{}] {}", args.namespace, args.kind, args.name);
+    tx.commit().await?;
 
+    let result_json = json!({
+        "action": "updated",
+        "namespace": args.namespace,
+        "kind": args.kind,
+        "name": args.name,
+        "add_tags": args.add_tags,
+        "remove_tags": args.remove_tags,
+        "meta_keys": meta_keys,
+        "remove_meta": remove_meta_keys,
+        "secret_keys": secret_keys,
+        "remove_secrets": remove_secret_keys,
+    });
+
+    match args.output {
+        OutputMode::Json | OutputMode::JsonCompact => {
+            print_json(&result_json, &args.output)?;
+        }
+        _ => {
+            println!("Updated: [{}/{}] {}", args.namespace, args.kind, args.name);
             if !args.add_tags.is_empty() {
                 println!("  +tags:     {}", args.add_tags.join(", "));
             }
@@ -143,26 +289,18 @@ pub async fn run(pool: &PgPool, args: UpdateArgs<'_>) -> Result<()> {
                 println!("  -tags:     {}", args.remove_tags.join(", "));
             }
             if !args.meta_entries.is_empty() {
-        let keys: Vec<&str> = args
-            .meta_entries
-            .iter()
-            .filter_map(|s| s.split_once('=').map(|(k, _)| k))
-            .collect();
-        println!("  +metadata: {}", keys.join(", "));
+                println!("  +metadata: {}", meta_keys.join(", "));
             }
             if !args.remove_meta.is_empty() {
-        println!("  -metadata: {}", args.remove_meta.join(", "));
+                println!("  -metadata: {}", remove_meta_keys.join(", "));
             }
             if !args.secret_entries.is_empty() {
-        let keys: Vec<&str> = args
-            .secret_entries
-            .iter()
-            .filter_map(|s| s.split_once('=').map(|(k, _)| k))
-            .collect();
-        println!("  +secrets:  {}", keys.join(", "));
+                println!("  +secrets:  {}", secret_keys.join(", "));
             }
             if !args.remove_secrets.is_empty() {
-        println!("  -secrets:  {}", args.remove_secrets.join(", "));
+                println!("  -secrets:  {}", remove_secret_keys.join(", "));
+            }
+        }
     }
 
     Ok(())

src/commands/upgrade.rs

@@ -0,0 +1,411 @@
+use anyhow::{Context, Result, bail};
+use flate2::read::GzDecoder;
+use serde::Deserialize;
+use sha2::{Digest, Sha256};
+use std::io::{Cursor, Read, Write};
+use std::time::Duration;
+
+const CURRENT_VERSION: &str = env!("CARGO_PKG_VERSION");
+
+/// Build-time config via `option_env!("SECRETS_UPGRADE_URL")`. Set during `cargo build`, e.g.:
+///   SECRETS_UPGRADE_URL=https://... cargo build --release
+const BUILD_UPGRADE_URL: Option<&'static str> = option_env!("SECRETS_UPGRADE_URL");
+
+fn upgrade_api_url() -> Result<String> {
+    if let Some(url) = BUILD_UPGRADE_URL.filter(|s| !s.trim().is_empty()) {
+        return Ok(url.to_string());
+    }
+    let url = std::env::var("SECRETS_UPGRADE_URL").context(
+        "SECRETS_UPGRADE_URL is not set at build or runtime. Set it when building: \
+         SECRETS_UPGRADE_URL=https://... cargo build, or export before running secrets upgrade.",
+    )?;
+    if url.trim().is_empty() {
+        anyhow::bail!("SECRETS_UPGRADE_URL is empty.");
+    }
+    Ok(url)
+}
+
+#[derive(Debug, Deserialize)]
+struct Release {
+    tag_name: String,
+    assets: Vec<Asset>,
+}
+
+#[derive(Debug, Deserialize)]
+struct Asset {
+    name: String,
+    browser_download_url: String,
+}
+
+fn available_assets(assets: &[Asset]) -> String {
+    assets
+        .iter()
+        .map(|a| a.name.as_str())
+        .collect::<Vec<_>>()
+        .join(", ")
+}
+
+fn release_asset_name(tag_name: &str, suffix: &str) -> String {
+    format!("secrets-{tag_name}-{suffix}")
+}
+
+fn find_asset_by_name<'a>(assets: &'a [Asset], name: &str) -> Result<&'a Asset> {
+    assets.iter().find(|a| a.name == name).with_context(|| {
+        format!(
+            "no matching release asset found: {name}\navailable: {}",
+            available_assets(assets)
+        )
+    })
+}
+
+/// Detect the asset suffix for the current platform/arch at compile time.
+fn platform_asset_suffix() -> Result<&'static str> {
+    #[cfg(all(target_os = "linux", target_arch = "x86_64"))]
+    {
+        Ok("x86_64-linux-musl.tar.gz")
+    }
+
+    #[cfg(all(target_os = "macos", target_arch = "aarch64"))]
+    {
+        Ok("aarch64-macos.tar.gz")
+    }
+
+    #[cfg(all(target_os = "macos", target_arch = "x86_64"))]
+    {
+        Ok("x86_64-macos.tar.gz")
+    }
+
+    #[cfg(all(target_os = "windows", target_arch = "x86_64"))]
+    {
+        Ok("x86_64-windows.zip")
+    }
+
+    #[cfg(not(any(
+        all(target_os = "linux", target_arch = "x86_64"),
+        all(target_os = "macos", target_arch = "aarch64"),
+        all(target_os = "macos", target_arch = "x86_64"),
+        all(target_os = "windows", target_arch = "x86_64"),
+    )))]
+    bail!(
+        "Unsupported platform: {}/{}",
+        std::env::consts::OS,
+        std::env::consts::ARCH
+    )
+}
+
+/// Strip the "secrets-" prefix from the tag and parse as semver.
+fn parse_tag_version(tag: &str) -> Result<semver::Version> {
+    let ver_str = tag
+        .strip_prefix("secrets-")
+        .with_context(|| format!("unexpected tag format: {tag}"))?;
+    semver::Version::parse(ver_str)
+        .with_context(|| format!("failed to parse version from tag: {tag}"))
+}
+
+fn sha256_hex(bytes: &[u8]) -> String {
+    let digest = Sha256::digest(bytes);
+    format!("{digest:x}")
+}
+
+fn verify_checksum(asset_name: &str, archive: &[u8], checksum_contents: &str) -> Result<String> {
+    let expected_checksum = parse_checksum_file(checksum_contents)?;
+    let actual_checksum = sha256_hex(archive);
+
+    if actual_checksum != expected_checksum {
+        bail!(
+            "checksum verification failed for {}: expected {}, got {}",
+            asset_name,
+            expected_checksum,
+            actual_checksum
+        );
+    }
+
+    Ok(actual_checksum)
+}
+
+fn parse_checksum_file(contents: &str) -> Result<String> {
+    let checksum = contents
+        .split_whitespace()
+        .next()
+        .context("checksum file is empty")?
+        .trim()
+        .to_ascii_lowercase();
+
+    if checksum.len() != 64 || !checksum.bytes().all(|b| b.is_ascii_hexdigit()) {
+        bail!("invalid SHA-256 checksum format")
+    }
+
+    Ok(checksum)
+}
+
+async fn download_bytes(client: &reqwest::Client, url: &str, context: &str) -> Result<Vec<u8>> {
+    Ok(client
+        .get(url)
+        .send()
+        .await
+        .with_context(|| format!("{context}: request failed"))?
+        .error_for_status()
+        .with_context(|| format!("{context}: server returned an error"))?
+        .bytes()
+        .await
+        .with_context(|| format!("{context}: failed to read response body"))?
+        .to_vec())
+}
+
+/// Extract the binary from a tar.gz archive (first file whose name == "secrets").
+fn extract_from_targz(bytes: &[u8]) -> Result<Vec<u8>> {
+    let gz = GzDecoder::new(Cursor::new(bytes));
+    let mut archive = tar::Archive::new(gz);
+    for entry in archive.entries().context("failed to read tar entries")? {
+        let mut entry = entry.context("bad tar entry")?;
+        let path = entry.path().context("bad tar entry path")?.into_owned();
+        let fname = path
+            .file_name()
+            .and_then(|n| n.to_str())
+            .unwrap_or_default();
+        if fname == "secrets" || fname == "secrets.exe" {
+            let mut buf = Vec::new();
+            entry.read_to_end(&mut buf).context("read tar entry")?;
+            return Ok(buf);
+        }
+    }
+    bail!("binary not found inside tar.gz archive")
+}
+
+/// Extract the binary from a zip archive (first file whose name matches).
+#[cfg(target_os = "windows")]
+fn extract_from_zip(bytes: &[u8]) -> Result<Vec<u8>> {
+    let reader = Cursor::new(bytes);
+    let mut archive = zip::ZipArchive::new(reader).context("failed to open zip archive")?;
+    for i in 0..archive.len() {
+        let mut file = archive.by_index(i).context("bad zip entry")?;
+        let fname = file.name().to_owned();
+        if fname.ends_with("secrets.exe") || fname.ends_with("secrets") {
+            let mut buf = Vec::new();
+            file.read_to_end(&mut buf).context("read zip entry")?;
+            return Ok(buf);
+        }
+    }
+    bail!("binary not found inside zip archive")
+}
+
+pub async fn run(check_only: bool) -> Result<()> {
+    let current = semver::Version::parse(CURRENT_VERSION).context("invalid current version")?;
+
+    println!("Current version: v{current}");
+    println!("Checking for updates...");
+
+    let client = reqwest::Client::builder()
+        .user_agent(format!("secrets-cli/{CURRENT_VERSION}"))
+        .connect_timeout(Duration::from_secs(10))
+        .timeout(Duration::from_secs(120))
+        .build()
+        .context("failed to build HTTP client")?;
+
+    let api_url = upgrade_api_url()?;
+    let release: Release = client
+        .get(&api_url)
+        .send()
+        .await
+        .context("failed to fetch release info")?
+        .error_for_status()
+        .context("release API returned an error")?
+        .json()
+        .await
+        .context("failed to parse release JSON")?;
+
+    let latest = parse_tag_version(&release.tag_name)?;
+
+    if latest <= current {
+        println!("Already up to date (v{current})");
+        return Ok(());
+    }
+
+    println!("New version available: v{latest}");
+
+    if check_only {
+        println!("Run `secrets upgrade` to update.");
+        return Ok(());
+    }
+
+    let suffix = platform_asset_suffix()?;
+    let asset_name = release_asset_name(&release.tag_name, suffix);
+    let asset = find_asset_by_name(&release.assets, &asset_name)?;
+    let checksum_name = format!("{}.sha256", asset.name);
+    let checksum_asset = find_asset_by_name(&release.assets, &checksum_name)?;
+
+    println!("Downloading {}...", asset.name);
+
+    let archive = download_bytes(&client, &asset.browser_download_url, "archive download").await?;
+    let checksum_contents = download_bytes(
+        &client,
+        &checksum_asset.browser_download_url,
+        "checksum download",
+    )
+    .await?;
+    let actual_checksum = verify_checksum(
+        &asset.name,
+        &archive,
+        std::str::from_utf8(&checksum_contents).context("checksum file is not valid UTF-8")?,
+    )?;
+
+    println!("Verified SHA-256: {actual_checksum}");
+
+    println!("Extracting...");
+
+    let binary = if suffix.ends_with(".tar.gz") {
+        extract_from_targz(&archive)?
+    } else {
+        #[cfg(target_os = "windows")]
+        {
+            extract_from_zip(&archive)?
+        }
+        #[cfg(not(target_os = "windows"))]
+        bail!("zip extraction is only supported on Windows")
+    };
+
+    // Write to a temporary file, set executable permission, then atomically replace.
+    let mut tmp = tempfile::NamedTempFile::new().context("failed to create temp file")?;
+    tmp.write_all(&binary)
+        .context("failed to write temp binary")?;
+
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::PermissionsExt;
+        let perms = std::fs::Permissions::from_mode(0o755);
+        std::fs::set_permissions(tmp.path(), perms).context("failed to chmod temp binary")?;
+    }
+
+    self_replace::self_replace(tmp.path()).context("failed to replace current binary")?;
+
+    println!("Updated: v{current} → v{latest}");
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use flate2::Compression;
+    use flate2::write::GzEncoder;
+    use tar::Builder;
+
+    #[test]
+    fn parse_tag_version_accepts_release_tag() {
+        let version = parse_tag_version("secrets-0.6.1").expect("version should parse");
+        assert_eq!(version, semver::Version::new(0, 6, 1));
+    }
+
+    #[test]
+    fn parse_tag_version_rejects_invalid_tag() {
+        let err = parse_tag_version("v0.6.1").expect_err("tag should be rejected");
+        assert!(err.to_string().contains("unexpected tag format"));
+    }
+
+    #[test]
+    fn parse_checksum_file_accepts_sha256sum_format() {
+        let checksum = parse_checksum_file(
+            "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef  secrets.tar.gz",
+        )
+        .expect("checksum should parse");
+        assert_eq!(
+            checksum,
+            "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+        );
+    }
+
+    #[test]
+    fn parse_checksum_file_rejects_invalid_checksum() {
+        let err = parse_checksum_file("not-a-sha256").expect_err("checksum should be rejected");
+        assert!(err.to_string().contains("invalid SHA-256 checksum format"));
+    }
+
+    #[test]
+    fn release_asset_name_matches_release_tag() {
+        assert_eq!(
+            release_asset_name("secrets-0.7.0", "x86_64-linux-musl.tar.gz"),
+            "secrets-secrets-0.7.0-x86_64-linux-musl.tar.gz"
+        );
+    }
+
+    #[test]
+    fn find_asset_by_name_rejects_stale_platform_match() {
+        let assets = vec![
+            Asset {
+                name: "secrets-secrets-0.6.9-x86_64-linux-musl.tar.gz".into(),
+                browser_download_url: "https://example.invalid/old".into(),
+            },
+            Asset {
+                name: "secrets-secrets-0.7.0-aarch64-macos.tar.gz".into(),
+                browser_download_url: "https://example.invalid/other".into(),
+            },
+        ];
+
+        let err = find_asset_by_name(&assets, "secrets-secrets-0.7.0-x86_64-linux-musl.tar.gz")
+            .expect_err("stale asset should not match");
+
+        assert!(err.to_string().contains("no matching release asset found"));
+    }
+
+    #[test]
+    fn sha256_hex_matches_known_value() {
+        assert_eq!(
+            sha256_hex(b"abc"),
+            "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"
+        );
+    }
+
+    #[test]
+    fn verify_checksum_rejects_mismatch() {
+        let err = verify_checksum(
+            "secrets.tar.gz",
+            b"abc",
+            "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef  secrets.tar.gz",
+        )
+        .expect_err("checksum mismatch should fail");
+
+        assert!(err.to_string().contains("checksum verification failed"));
+    }
+
+    #[test]
+    fn extract_from_targz_reads_binary() {
+        let payload = b"fake-secrets-binary";
+        let archive = make_test_targz("secrets", payload);
+        let extracted = extract_from_targz(&archive).expect("binary should extract");
+        assert_eq!(extracted, payload);
+    }
+
+    fn make_test_targz(name: &str, payload: &[u8]) -> Vec<u8> {
+        let encoder = GzEncoder::new(Vec::new(), Compression::default());
+        let mut builder = Builder::new(encoder);
+
+        let mut header = tar::Header::new_gnu();
+        header.set_mode(0o755);
+        header.set_size(payload.len() as u64);
+        header.set_cksum();
+        builder
+            .append_data(&mut header, name, payload)
+            .expect("append tar entry");
+
+        let encoder = builder.into_inner().expect("finish tar builder");
+        encoder.finish().expect("finish gzip")
+    }
+
+    #[cfg(target_os = "windows")]
+    #[test]
+    fn extract_from_zip_reads_binary() {
+        use zip::write::SimpleFileOptions;
+
+        let cursor = Cursor::new(Vec::<u8>::new());
+        let mut writer = zip::ZipWriter::new(cursor);
+        writer
+            .start_file("secrets.exe", SimpleFileOptions::default())
+            .expect("start zip file");
+        writer
+            .write_all(b"fake-secrets-binary")
+            .expect("write zip payload");
+        let bytes = writer.finish().expect("finish zip").into_inner();
+
+        let extracted = extract_from_zip(&bytes).expect("binary should extract");
+        assert_eq!(extracted, b"fake-secrets-binary");
+    }
+}

src/config.rs

@@ -8,52 +8,59 @@ pub struct Config {
     pub database_url: Option<String>,
 }
 
-pub fn config_dir() -> PathBuf {
-    dirs::config_dir()
-        .unwrap_or_else(|| PathBuf::from("~/.config"))
-        .join("secrets")
+pub fn config_dir() -> Result<PathBuf> {
+    let dir = dirs::config_dir()
+        .or_else(|| dirs::home_dir().map(|h| h.join(".config")))
+        .context(
+            "Cannot determine config directory: \
+             neither XDG_CONFIG_HOME nor HOME is set",
+        )?
+        .join("secrets");
+    Ok(dir)
 }
 
-pub fn config_path() -> PathBuf {
-    config_dir().join("config.toml")
+pub fn config_path() -> Result<PathBuf> {
+    Ok(config_dir()?.join("config.toml"))
 }
 
 pub fn load_config() -> Result<Config> {
-    let path = config_path();
+    let path = config_path()?;
     if !path.exists() {
         return Ok(Config::default());
     }
     let content = fs::read_to_string(&path)
-        .with_context(|| format!("读取配置文件失败: {}", path.display()))?;
+        .with_context(|| format!("failed to read config file: {}", path.display()))?;
     let config: Config = toml::from_str(&content)
-        .with_context(|| format!("解析配置文件失败: {}", path.display()))?;
+        .with_context(|| format!("failed to parse config file: {}", path.display()))?;
     Ok(config)
 }
 
 pub fn save_config(config: &Config) -> Result<()> {
-    let dir = config_dir();
-    fs::create_dir_all(&dir).with_context(|| format!("创建配置目录失败: {}", dir.display()))?;
+    let dir = config_dir()?;
+    fs::create_dir_all(&dir)
+        .with_context(|| format!("failed to create config dir: {}", dir.display()))?;
 
-    let path = config_path();
-    let content = toml::to_string_pretty(config).context("序列化配置失败")?;
-    fs::write(&path, &content).with_context(|| format!("写入配置文件失败: {}", path.display()))?;
+    let path = dir.join("config.toml");
+    let content = toml::to_string_pretty(config).context("failed to serialize config")?;
+    fs::write(&path, &content)
+        .with_context(|| format!("failed to write config file: {}", path.display()))?;
 
-    // 设置文件权限为 0600（仅所有者读写）
+    // Set file permissions to 0600 (owner read/write only)
     #[cfg(unix)]
     {
         use std::os::unix::fs::PermissionsExt;
         let perms = fs::Permissions::from_mode(0o600);
         fs::set_permissions(&path, perms)
-            .with_context(|| format!("设置文件权限失败: {}", path.display()))?;
+            .with_context(|| format!("failed to set file permissions: {}", path.display()))?;
     }
 
     Ok(())
 }
 
-/// 按优先级解析数据库连接串：
-/// 1. --db-url CLI 参数（非空时使用）
-/// 2. ~/.config/secrets/config.toml 中的 database_url
-/// 3. 报错并提示用户配置
+/// Resolve database URL by priority:
+/// 1. --db-url CLI flag (if non-empty)
+/// 2. database_url in ~/.config/secrets/config.toml
+/// 3. Error with setup instructions
 pub fn resolve_db_url(cli_db_url: &str) -> Result<String> {
     if !cli_db_url.is_empty() {
         return Ok(cli_db_url.to_string());
@@ -66,5 +73,5 @@ pub fn resolve_db_url(cli_db_url: &str) -> Result<String> {
         return Ok(url);
     }
 
-    anyhow::bail!("数据库未配置。请先运行：\n\n    secrets config set-db <DATABASE_URL>\n")
+    anyhow::bail!("Database not configured. Run:\n\n    secrets config set-db <DATABASE_URL>\n")
 }

src/crypto.rs

@@ -0,0 +1,195 @@
+use aes_gcm::{
+    Aes256Gcm, Key, Nonce,
+    aead::{Aead, AeadCore, KeyInit, OsRng},
+};
+use anyhow::{Context, Result, bail};
+use argon2::{Argon2, Params, Version};
+use serde_json::Value;
+
+const KEYRING_SERVICE: &str = "secrets-cli";
+const KEYRING_USER: &str = "master-key";
+const NONCE_LEN: usize = 12;
+
+// Argon2id parameters — OWASP recommended (m=64 MiB, t=3 iterations, p=4 threads, key=32 B)
+const ARGON2_M_COST: u32 = 65_536;
+const ARGON2_T_COST: u32 = 3;
+const ARGON2_P_COST: u32 = 4;
+const ARGON2_KEY_LEN: usize = 32;
+
+// ─── Argon2id key derivation ─────────────────────────────────────────────────
+
+/// Derive a 32-byte Master Key from a password and salt using Argon2id.
+/// Parameters: m=65536 KiB (64 MB), t=3, p=4 — OWASP recommended.
+pub fn derive_master_key(password: &str, salt: &[u8]) -> Result<[u8; 32]> {
+    let params = Params::new(
+        ARGON2_M_COST,
+        ARGON2_T_COST,
+        ARGON2_P_COST,
+        Some(ARGON2_KEY_LEN),
+    )
+    .context("invalid Argon2id params")?;
+    let argon2 = Argon2::new(argon2::Algorithm::Argon2id, Version::V0x13, params);
+    let mut key = [0u8; 32];
+    argon2
+        .hash_password_into(password.as_bytes(), salt, &mut key)
+        .map_err(|e| anyhow::anyhow!("Argon2id derivation failed: {}", e))?;
+    Ok(key)
+}
+
+// ─── AES-256-GCM encrypt / decrypt ───────────────────────────────────────────
+
+/// Encrypt plaintext bytes with AES-256-GCM.
+/// Returns `nonce (12 B) || ciphertext+tag`.
+pub fn encrypt(master_key: &[u8; 32], plaintext: &[u8]) -> Result<Vec<u8>> {
+    let key = Key::<Aes256Gcm>::from_slice(master_key);
+    let cipher = Aes256Gcm::new(key);
+    let nonce = Aes256Gcm::generate_nonce(&mut OsRng);
+    let ciphertext = cipher
+        .encrypt(&nonce, plaintext)
+        .map_err(|e| anyhow::anyhow!("AES-256-GCM encryption failed: {}", e))?;
+    let mut out = Vec::with_capacity(NONCE_LEN + ciphertext.len());
+    out.extend_from_slice(&nonce);
+    out.extend_from_slice(&ciphertext);
+    Ok(out)
+}
+
+/// Decrypt `nonce (12 B) || ciphertext+tag` with AES-256-GCM.
+pub fn decrypt(master_key: &[u8; 32], data: &[u8]) -> Result<Vec<u8>> {
+    if data.len() < NONCE_LEN {
+        bail!(
+            "encrypted data too short ({}B); possibly corrupted",
+            data.len()
+        );
+    }
+    let (nonce_bytes, ciphertext) = data.split_at(NONCE_LEN);
+    let key = Key::<Aes256Gcm>::from_slice(master_key);
+    let cipher = Aes256Gcm::new(key);
+    let nonce = Nonce::from_slice(nonce_bytes);
+    cipher
+        .decrypt(nonce, ciphertext)
+        .map_err(|_| anyhow::anyhow!("decryption failed — wrong master key or corrupted data"))
+}
+
+// ─── JSON helpers ─────────────────────────────────────────────────────────────
+
+/// Serialize a JSON Value and encrypt it. Returns the encrypted blob.
+pub fn encrypt_json(master_key: &[u8; 32], value: &Value) -> Result<Vec<u8>> {
+    let bytes = serde_json::to_vec(value).context("serialize JSON for encryption")?;
+    encrypt(master_key, &bytes)
+}
+
+/// Decrypt an encrypted blob and deserialize it as a JSON Value.
+pub fn decrypt_json(master_key: &[u8; 32], data: &[u8]) -> Result<Value> {
+    let bytes = decrypt(master_key, data)?;
+    serde_json::from_slice(&bytes).context("deserialize decrypted JSON")
+}
+
+// ─── OS Keychain ──────────────────────────────────────────────────────────────
+
+/// Load the Master Key from the OS Keychain.
+/// Returns an error with a helpful message if it hasn't been initialized.
+pub fn load_master_key() -> Result<[u8; 32]> {
+    let entry =
+        keyring::Entry::new(KEYRING_SERVICE, KEYRING_USER).context("create keychain entry")?;
+    let hex = entry.get_password().map_err(|_| {
+        anyhow::anyhow!("Master key not found in keychain. Run `secrets init` first.")
+    })?;
+    let bytes = hex::decode_hex(&hex)?;
+    if bytes.len() != 32 {
+        bail!(
+            "stored master key has unexpected length {}; re-run `secrets init`",
+            bytes.len()
+        );
+    }
+    let mut key = [0u8; 32];
+    key.copy_from_slice(&bytes);
+    Ok(key)
+}
+
+/// Store the Master Key in the OS Keychain (overwrites any existing value).
+pub fn store_master_key(key: &[u8; 32]) -> Result<()> {
+    let entry =
+        keyring::Entry::new(KEYRING_SERVICE, KEYRING_USER).context("create keychain entry")?;
+    let hex = hex::encode_hex(key);
+    entry
+        .set_password(&hex)
+        .map_err(|e| anyhow::anyhow!("keychain write failed: {}", e))?;
+    Ok(())
+}
+
+// ─── Minimal hex helpers (avoid extra dep) ────────────────────────────────────
+
+mod hex {
+    use anyhow::{Result, bail};
+
+    pub fn encode_hex(bytes: &[u8]) -> String {
+        bytes.iter().map(|b| format!("{:02x}", b)).collect()
+    }
+
+    pub fn decode_hex(s: &str) -> Result<Vec<u8>> {
+        if !s.len().is_multiple_of(2) {
+            bail!("hex string has odd length");
+        }
+        (0..s.len())
+            .step_by(2)
+            .map(|i| u8::from_str_radix(&s[i..i + 2], 16).map_err(|e| anyhow::anyhow!("{}", e)))
+            .collect()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn roundtrip_encrypt_decrypt() {
+        let key = [0x42u8; 32];
+        let plaintext = b"hello world";
+        let enc = encrypt(&key, plaintext).unwrap();
+        let dec = decrypt(&key, &enc).unwrap();
+        assert_eq!(dec, plaintext);
+    }
+
+    #[test]
+    fn encrypt_produces_different_ciphertexts() {
+        let key = [0x42u8; 32];
+        let plaintext = b"hello world";
+        let enc1 = encrypt(&key, plaintext).unwrap();
+        let enc2 = encrypt(&key, plaintext).unwrap();
+        // Different nonces → different ciphertexts
+        assert_ne!(enc1, enc2);
+    }
+
+    #[test]
+    fn wrong_key_fails_decryption() {
+        let key1 = [0x42u8; 32];
+        let key2 = [0x43u8; 32];
+        let enc = encrypt(&key1, b"secret").unwrap();
+        assert!(decrypt(&key2, &enc).is_err());
+    }
+
+    #[test]
+    fn json_roundtrip() {
+        let key = [0x42u8; 32];
+        let value = serde_json::json!({"token": "abc123", "password": "hunter2"});
+        let enc = encrypt_json(&key, &value).unwrap();
+        let dec = decrypt_json(&key, &enc).unwrap();
+        assert_eq!(dec, value);
+    }
+
+    #[test]
+    fn derive_master_key_deterministic() {
+        let salt = b"fixed_test_salt_";
+        let k1 = derive_master_key("password", salt).unwrap();
+        let k2 = derive_master_key("password", salt).unwrap();
+        assert_eq!(k1, k2);
+    }
+
+    #[test]
+    fn derive_master_key_different_passwords() {
+        let salt = b"fixed_test_salt_";
+        let k1 = derive_master_key("password1", salt).unwrap();
+        let k2 = derive_master_key("password2", salt).unwrap();
+        assert_ne!(k1, k2);
+    }
+}

src/db.rs

@@ -1,11 +1,15 @@
 use anyhow::Result;
+use serde_json::Value;
 use sqlx::PgPool;
 use sqlx::postgres::PgPoolOptions;
 
+use crate::audit::current_actor;
+
 pub async fn create_pool(database_url: &str) -> Result<PgPool> {
     tracing::debug!("connecting to database");
     let pool = PgPoolOptions::new()
         .max_connections(5)
+        .acquire_timeout(std::time::Duration::from_secs(5))
         .connect(database_url)
         .await?;
     tracing::debug!("database connection established");
@@ -16,30 +20,48 @@ pub async fn migrate(pool: &PgPool) -> Result<()> {
     tracing::debug!("running migrations");
     sqlx::raw_sql(
         r#"
-        CREATE TABLE IF NOT EXISTS secrets (
+        -- ── entries: top-level entities (server, service, key, …) ──────────────
+        CREATE TABLE IF NOT EXISTS entries (
             id          UUID PRIMARY KEY DEFAULT uuidv7(),
             namespace   VARCHAR(64)  NOT NULL,
             kind        VARCHAR(64)  NOT NULL,
             name        VARCHAR(256) NOT NULL,
             tags        TEXT[]       NOT NULL DEFAULT '{}',
             metadata    JSONB        NOT NULL DEFAULT '{}',
-            encrypted   JSONB        NOT NULL DEFAULT '{}',
+            version     BIGINT       NOT NULL DEFAULT 1,
             created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
             updated_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
             UNIQUE(namespace, kind, name)
         );
 
-        -- idempotent column add for existing tables
-        DO $$ BEGIN
-            ALTER TABLE secrets ADD COLUMN IF NOT EXISTS metadata JSONB NOT NULL DEFAULT '{}';
-        EXCEPTION WHEN OTHERS THEN NULL;
-        END $$;
+        CREATE INDEX IF NOT EXISTS idx_entries_namespace ON entries(namespace);
+        CREATE INDEX IF NOT EXISTS idx_entries_kind      ON entries(kind);
+        CREATE INDEX IF NOT EXISTS idx_entries_tags      ON entries USING GIN(tags);
+        CREATE INDEX IF NOT EXISTS idx_entries_metadata  ON entries USING GIN(metadata jsonb_path_ops);
 
-        CREATE INDEX IF NOT EXISTS idx_secrets_namespace ON secrets(namespace);
-        CREATE INDEX IF NOT EXISTS idx_secrets_kind ON secrets(kind);
-        CREATE INDEX IF NOT EXISTS idx_secrets_tags ON secrets USING GIN(tags);
-        CREATE INDEX IF NOT EXISTS idx_secrets_metadata ON secrets USING GIN(metadata jsonb_path_ops);
+        -- ── secrets: one row per encrypted field, plaintext schema metadata ────
+        CREATE TABLE IF NOT EXISTS secrets (
+            id          UUID PRIMARY KEY DEFAULT uuidv7(),
+            entry_id    UUID         NOT NULL REFERENCES entries(id) ON DELETE CASCADE,
+            field_name  VARCHAR(256) NOT NULL,
+            field_type  VARCHAR(32)  NOT NULL DEFAULT 'string',
+            value_len   INT          NOT NULL DEFAULT 0,
+            encrypted   BYTEA        NOT NULL DEFAULT '\x',
+            version     BIGINT       NOT NULL DEFAULT 1,
+            created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+            updated_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+            UNIQUE(entry_id, field_name)
+        );
 
+        CREATE INDEX IF NOT EXISTS idx_secrets_entry_id ON secrets(entry_id);
+
+        -- ── kv_config: global key-value store (Argon2id salt, etc.) ────────────
+        CREATE TABLE IF NOT EXISTS kv_config (
+            key   TEXT PRIMARY KEY,
+            value BYTEA NOT NULL
+        );
+
+        -- ── audit_log: append-only operation log ────────────────────────────────
         CREATE TABLE IF NOT EXISTS audit_log (
             id          BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
             action      VARCHAR(32)  NOT NULL,
@@ -53,6 +75,46 @@ pub async fn migrate(pool: &PgPool) -> Result<()> {
 
         CREATE INDEX IF NOT EXISTS idx_audit_log_created  ON audit_log(created_at DESC);
         CREATE INDEX IF NOT EXISTS idx_audit_log_ns_kind  ON audit_log(namespace, kind);
+
+        -- ── entries_history: entry-level snapshot (tags + metadata) ─────────────
+        CREATE TABLE IF NOT EXISTS entries_history (
+            id          BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+            entry_id    UUID         NOT NULL,
+            namespace   VARCHAR(64)  NOT NULL,
+            kind        VARCHAR(64)  NOT NULL,
+            name        VARCHAR(256) NOT NULL,
+            version     BIGINT       NOT NULL,
+            action      VARCHAR(16)  NOT NULL,
+            tags        TEXT[]       NOT NULL DEFAULT '{}',
+            metadata    JSONB        NOT NULL DEFAULT '{}',
+            actor       VARCHAR(128) NOT NULL DEFAULT '',
+            created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+        );
+
+        CREATE INDEX IF NOT EXISTS idx_entries_history_entry_id
+            ON entries_history(entry_id, version DESC);
+        CREATE INDEX IF NOT EXISTS idx_entries_history_ns_kind_name
+            ON entries_history(namespace, kind, name, version DESC);
+
+        -- ── secrets_history: field-level snapshot ───────────────────────────────
+        CREATE TABLE IF NOT EXISTS secrets_history (
+            id              BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+            entry_id        UUID         NOT NULL,
+            secret_id       UUID         NOT NULL,
+            entry_version   BIGINT       NOT NULL,
+            field_name      VARCHAR(256) NOT NULL,
+            field_type      VARCHAR(32)  NOT NULL DEFAULT 'string',
+            value_len       INT          NOT NULL DEFAULT 0,
+            encrypted       BYTEA        NOT NULL DEFAULT '\x',
+            action          VARCHAR(16)  NOT NULL,
+            actor           VARCHAR(128) NOT NULL DEFAULT '',
+            created_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+        );
+
+        CREATE INDEX IF NOT EXISTS idx_secrets_history_entry_id
+            ON secrets_history(entry_id, entry_version DESC);
+        CREATE INDEX IF NOT EXISTS idx_secrets_history_secret_id
+            ON secrets_history(secret_id);
         "#,
     )
     .execute(pool)
@@ -60,3 +122,102 @@ pub async fn migrate(pool: &PgPool) -> Result<()> {
     tracing::debug!("migrations complete");
     Ok(())
 }
+
+// ── Entry-level history snapshot ────────────────────────────────────────────
+
+pub struct EntrySnapshotParams<'a> {
+    pub entry_id: uuid::Uuid,
+    pub namespace: &'a str,
+    pub kind: &'a str,
+    pub name: &'a str,
+    pub version: i64,
+    pub action: &'a str,
+    pub tags: &'a [String],
+    pub metadata: &'a Value,
+}
+
+/// Snapshot an entry row into `entries_history` before a write operation.
+pub async fn snapshot_entry_history(
+    tx: &mut sqlx::Transaction<'_, sqlx::Postgres>,
+    p: EntrySnapshotParams<'_>,
+) -> Result<()> {
+    let actor = current_actor();
+    sqlx::query(
+        "INSERT INTO entries_history \
+         (entry_id, namespace, kind, name, version, action, tags, metadata, actor) \
+         VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)",
+    )
+    .bind(p.entry_id)
+    .bind(p.namespace)
+    .bind(p.kind)
+    .bind(p.name)
+    .bind(p.version)
+    .bind(p.action)
+    .bind(p.tags)
+    .bind(p.metadata)
+    .bind(&actor)
+    .execute(&mut **tx)
+    .await?;
+    Ok(())
+}
+
+// ── Secret field-level history snapshot ─────────────────────────────────────
+
+pub struct SecretSnapshotParams<'a> {
+    pub entry_id: uuid::Uuid,
+    pub secret_id: uuid::Uuid,
+    pub entry_version: i64,
+    pub field_name: &'a str,
+    pub field_type: &'a str,
+    pub value_len: i32,
+    pub encrypted: &'a [u8],
+    pub action: &'a str,
+}
+
+/// Snapshot a single secret field into `secrets_history`.
+pub async fn snapshot_secret_history(
+    tx: &mut sqlx::Transaction<'_, sqlx::Postgres>,
+    p: SecretSnapshotParams<'_>,
+) -> Result<()> {
+    let actor = current_actor();
+    sqlx::query(
+        "INSERT INTO secrets_history \
+         (entry_id, secret_id, entry_version, field_name, field_type, value_len, encrypted, action, actor) \
+         VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)",
+    )
+    .bind(p.entry_id)
+    .bind(p.secret_id)
+    .bind(p.entry_version)
+    .bind(p.field_name)
+    .bind(p.field_type)
+    .bind(p.value_len)
+    .bind(p.encrypted)
+    .bind(p.action)
+    .bind(&actor)
+    .execute(&mut **tx)
+    .await?;
+    Ok(())
+}
+
+// ── Argon2 salt helpers ──────────────────────────────────────────────────────
+
+/// Load the Argon2id salt from the database.
+pub async fn load_argon2_salt(pool: &PgPool) -> Result<Option<Vec<u8>>> {
+    let row: Option<(Vec<u8>,)> =
+        sqlx::query_as("SELECT value FROM kv_config WHERE key = 'argon2_salt'")
+            .fetch_optional(pool)
+            .await?;
+    Ok(row.map(|(v,)| v))
+}
+
+/// Store the Argon2id salt in the database (only called once on first device init).
+pub async fn store_argon2_salt(pool: &PgPool, salt: &[u8]) -> Result<()> {
+    sqlx::query(
+        "INSERT INTO kv_config (key, value) VALUES ('argon2_salt', $1) \
+         ON CONFLICT (key) DO NOTHING",
+    )
+    .bind(salt)
+    .execute(pool)
+    .await?;
+    Ok(())
+}

src/main.rs

@@ -1,11 +1,17 @@
 mod audit;
 mod commands;
 mod config;
+mod crypto;
 mod db;
 mod models;
 mod output;
 
 use anyhow::Result;
+
+/// Load .env from current or parent directories (best-effort, no error if missing).
+fn load_dotenv() {
+    let _ = dotenvy::dotenv();
+}
 use clap::{Parser, Subcommand};
 use tracing_subscriber::EnvFilter;
 
@@ -16,18 +22,27 @@ use output::resolve_output_mode;
     name = "secrets",
     version,
     about = "Secrets & config manager backed by PostgreSQL — optimised for AI agents",
-    after_help = "QUICK START (AI agents):
+    after_help = "QUICK START:
+  # 1. Configure database (once per device)
+  secrets config set-db \"postgres://postgres:<password>@<host>:<port>/secrets\"
+
+  # 2. Initialize master key (once per device)
+  secrets init
+
   # Discover what namespaces / kinds exist
   secrets search --summary --limit 20
 
   # Precise lookup (JSON output for easy parsing)
-  secrets search -n refining --kind service --name gitea -o json --show-secrets
+  secrets search -n refining --kind service --name gitea -o json
 
-  # Extract a single field value directly
-  secrets search -n refining --kind service --name gitea -f secret.token
+  # Extract a single metadata field directly
+  secrets search -n refining --kind service --name gitea -f metadata.url
 
   # Pipe-friendly (non-TTY defaults to json-compact automatically)
-  secrets search -n refining --kind service | jq '.[].name'"
+  secrets search -n refining --kind service | jq '.[].name'
+
+  # Inject secrets into environment variables when you really need them
+  secrets inject -n refining --kind service --name gitea"
 )]
 struct Cli {
     /// Database URL, overrides saved config (one-time override)
@@ -44,24 +59,59 @@ struct Cli {
 
 #[derive(Subcommand)]
 enum Commands {
+    /// Initialize master key on this device (run once per device).
+    ///
+    /// Prompts for a master password, derives a key with Argon2id, and stores
+    /// it in the OS Keychain. Use the same password on every device.
+    ///
+    /// NOTE: Run `secrets config set-db <URL>` first if database is not configured.
+    #[command(after_help = "PREREQUISITE:
+  Database must be configured first. Run: secrets config set-db <DATABASE_URL>
+
+EXAMPLES:
+  # First device: generates a new Argon2id salt and stores master key
+  secrets init
+
+  # Subsequent devices: reuses existing salt from the database
+  secrets init")]
+    Init,
+
     /// Add or update a record (upsert). Use -m for plaintext metadata, -s for secrets.
     #[command(after_help = "EXAMPLES:
   # Add a server
   secrets add -n refining --kind server --name my-server \\
     --tag aliyun --tag shanghai \\
-    -m ip=47.117.131.22 -m desc=\"Aliyun Shanghai ECS\" \\
+    -m ip=10.0.0.1 -m desc=\"Example ECS\" \\
     -s username=root -s ssh_key=@./keys/server.pem
 
   # Add a service credential
   secrets add -n refining --kind service --name gitea \\
     --tag gitea \\
-    -m url=https://gitea.refining.dev -m default_org=refining \\
+    -m url=https://code.example.com -m default_org=myorg \\
     -s token=<token>
 
+  # Add typed JSON metadata
+  secrets add -n refining --kind service --name gitea \\
+    -m port:=3000 \\
+    -m enabled:=true \\
+    -m domains:='[\"code.example.com\",\"git.example.com\"]' \\
+    -m tls:='{\"enabled\":true,\"redirect_http\":true}'
+
   # Add with token read from a file
   secrets add -n ricnsmart --kind service --name mqtt \\
-    -m host=mqtt.ricnsmart.com -m port=1883 \\
-    -s password=@./mqtt_password.txt")]
+    -m host=mqtt.example.com -m port=1883 \\
+    -s password=@./mqtt_password.txt
+
+  # Add typed JSON secrets
+  secrets add -n refining --kind service --name deploy-bot \\
+    -s enabled:=true \\
+    -s retry_count:=3 \\
+    -s scopes:='[\"repo\",\"workflow\"]' \\
+    -s extra:='{\"region\":\"ap-east-1\",\"verify_tls\":true}'
+
+  # Write a multiline file into a nested secret field
+  secrets add -n refining --kind server --name my-server \\
+    -s credentials:content@./keys/server.pem")]
     Add {
         /// Namespace, e.g. refining, ricnsmart
         #[arg(short, long)]
@@ -69,19 +119,19 @@ enum Commands {
         /// Kind of record: server, service, key, ...
         #[arg(long)]
         kind: String,
-        /// Human-readable unique name, e.g. gitea, i-uf63f2uookgs5uxmrdyc
+        /// Human-readable unique name, e.g. gitea, i-example0abcd1234efgh
         #[arg(long)]
         name: String,
         /// Tag for categorization (repeatable), e.g. --tag aliyun --tag hongkong
         #[arg(long = "tag")]
         tags: Vec<String>,
-        /// Plaintext metadata: key=value (repeatable; value=@file reads from file)
+        /// Plaintext metadata: key=value, key:=<json>, key=@file, or nested:path@file
         #[arg(long = "meta", short = 'm')]
         meta: Vec<String>,
-        /// Secret entry: key=value (repeatable; value=@file reads from file)
+        /// Secret entry: key=value, key:=<json>, key=@file, or nested:path@file
         #[arg(long = "secret", short = 's')]
         secrets: Vec<String>,
-        /// Output format: text (default on TTY), json, json-compact, env
+        /// Output format: text (default on TTY), json, json-compact
         #[arg(short, long = "output")]
         output: Option<String>,
     },
@@ -90,7 +140,7 @@ enum Commands {
     ///
     /// Supports fuzzy search (-q), exact lookup (--name), field extraction (-f),
     /// summary view (--summary), pagination (--limit / --offset), and structured
-    /// output (-o json / json-compact / env). When stdout is not a TTY, output
+    /// output (-o json / json-compact). When stdout is not a TTY, output
     /// defaults to json-compact automatically.
     #[command(after_help = "EXAMPLES:
   # Discover all records (summary, safe default limit)
@@ -105,19 +155,16 @@ enum Commands {
   # Fuzzy keyword search (matches name, namespace, kind, tags, metadata)
   secrets search -q mqtt
 
-  # Extract a single field value (implies --show-secrets for secret.*)
-  secrets search -n refining --kind service --name gitea -f secret.token
+  # Extract a single metadata field value
   secrets search -n refining --kind service --name gitea -f metadata.url
 
   # Multiple fields at once
   secrets search -n refining --kind service --name gitea \\
-    -f metadata.url -f metadata.default_org -f secret.token
+    -f metadata.url -f metadata.default_org
 
-  # Full JSON output with secrets revealed (ideal for AI parsing)
-  secrets search -n refining --kind service --name gitea -o json --show-secrets
-
-  # Export as env vars (source-able; single record only)
-  secrets search -n refining --kind service --name gitea -o env --show-secrets
+  # Inject decrypted secrets only when needed
+  secrets inject -n refining --kind service --name gitea
+  secrets run -n refining --kind service --name gitea -- printenv
 
   # Paginate large result sets
   secrets search -n refining --summary --limit 10 --offset 0
@@ -127,8 +174,7 @@ enum Commands {
   secrets search --sort updated --limit 5 --summary
 
   # Non-TTY / pipe: output is json-compact by default
-  secrets search -n refining --kind service | jq '.[].name'
-  secrets search -n refining --kind service --name gitea --show-secrets | jq '.secrets.token'")]
+  secrets search -n refining --kind service | jq '.[].name'")]
     Search {
         /// Filter by namespace, e.g. refining, ricnsmart
         #[arg(short, long)]
@@ -136,19 +182,16 @@ enum Commands {
         /// Filter by kind, e.g. server, service
         #[arg(long)]
         kind: Option<String>,
-        /// Exact name filter, e.g. gitea, i-uf63f2uookgs5uxmrdyc
+        /// Exact name filter, e.g. gitea, i-example0abcd1234efgh
         #[arg(long)]
         name: Option<String>,
-        /// Filter by tag, e.g. --tag aliyun
+        /// Filter by tag, e.g. --tag aliyun (repeatable for AND intersection)
         #[arg(long)]
-        tag: Option<String>,
+        tag: Vec<String>,
         /// Fuzzy keyword (matches name, namespace, kind, tags, metadata text)
         #[arg(short, long)]
         query: Option<String>,
-        /// Reveal encrypted secret values in output
-        #[arg(long)]
-        show_secrets: bool,
-        /// Extract field value(s) directly: metadata.<key> or secret.<key> (repeatable)
+        /// Extract metadata field value(s) directly: metadata.<key> (repeatable)
         #[arg(short = 'f', long = "field")]
         fields: Vec<String>,
         /// Return lightweight summary only (namespace, kind, name, tags, desc, updated_at)
@@ -163,28 +206,47 @@ enum Commands {
         /// Sort order: name (default), updated, created
         #[arg(long, default_value = "name")]
         sort: String,
-        /// Output format: text (default on TTY), json, json-compact, env
+        /// Output format: text (default on TTY), json, json-compact
         #[arg(short, long = "output")]
         output: Option<String>,
     },
 
-    /// Delete a record permanently. Requires exact namespace + kind + name.
+    /// Delete one record precisely, or bulk-delete by namespace.
+    ///
+    /// With --name: deletes exactly that record (--kind also required).
+    /// Without --name: bulk-deletes all records matching namespace + optional --kind.
+    /// Use --dry-run to preview bulk deletes before committing.
     #[command(after_help = "EXAMPLES:
-  # Delete a service credential
+  # Delete a single record (exact match)
   secrets delete -n refining --kind service --name legacy-mqtt
 
-  # Delete a server record
-  secrets delete -n ricnsmart --kind server --name i-old-server-id")]
+  # Preview what a bulk delete would remove (no writes)
+  secrets delete -n refining --dry-run
+
+  # Bulk-delete all records in a namespace
+  secrets delete -n ricnsmart
+
+  # Bulk-delete only server records in a namespace
+  secrets delete -n ricnsmart --kind server
+
+  # JSON output
+  secrets delete -n refining --kind service -o json")]
     Delete {
         /// Namespace, e.g. refining
         #[arg(short, long)]
         namespace: String,
-        /// Kind, e.g. server, service
+        /// Kind filter, e.g. server, service (required with --name; optional for bulk)
         #[arg(long)]
-        kind: String,
-        /// Exact name of the record to delete
+        kind: Option<String>,
+        /// Exact name of the record to delete (omit for bulk delete)
         #[arg(long)]
-        name: String,
+        name: Option<String>,
+        /// Preview what would be deleted without making any changes (bulk mode only)
+        #[arg(long)]
+        dry_run: bool,
+        /// Output format: text (default on TTY), json, json-compact
+        #[arg(short, long = "output")]
+        output: Option<String>,
     },
 
     /// Incrementally update an existing record (merge semantics; record must exist).
@@ -198,6 +260,11 @@ enum Commands {
   # Rotate a secret token
   secrets update -n refining --kind service --name gitea -s token=<new-token>
 
+  # Update typed JSON metadata
+  secrets update -n refining --kind service --name gitea \\
+    -m deploy:strategy:='{\"type\":\"rolling\",\"batch\":2}' \\
+    -m runtime:max_open_conns:=20
+
   # Add a tag and rotate password at the same time
   secrets update -n refining --kind service --name gitea \\
     --add-tag production -s token=<new-token>
@@ -206,8 +273,21 @@ enum Commands {
   secrets update -n refining --kind service --name mqtt \\
     --remove-meta old_port --remove-secret old_password
 
+  # Remove a nested field
+  secrets update -n refining --kind server --name my-server \\
+    --remove-secret credentials:content
+
   # Remove a tag
-  secrets update -n refining --kind service --name gitea --remove-tag staging")]
+  secrets update -n refining --kind service --name gitea --remove-tag staging
+
+  # Update a nested secret field from a file
+  secrets update -n refining --kind server --name my-server \\
+    -s credentials:content@./keys/server.pem
+
+  # Update nested typed JSON fields
+  secrets update -n refining --kind service --name deploy-bot \\
+    -s auth:config:='{\"issuer\":\"gitea\",\"rotate\":true}' \\
+    -s auth:retry:=5")]
     Update {
         /// Namespace, e.g. refining, ricnsmart
         #[arg(short, long)]
@@ -224,18 +304,21 @@ enum Commands {
         /// Remove a tag (repeatable)
         #[arg(long = "remove-tag")]
         remove_tags: Vec<String>,
-        /// Set or overwrite a metadata field: key=value (repeatable, @file supported)
+        /// Set or overwrite a metadata field: key=value, key:=<json>, key=@file, or nested:path@file
         #[arg(long = "meta", short = 'm')]
         meta: Vec<String>,
-        /// Delete a metadata field by key (repeatable)
+        /// Delete a metadata field by key or nested path, e.g. old_port or credentials:content
         #[arg(long = "remove-meta")]
         remove_meta: Vec<String>,
-        /// Set or overwrite a secret field: key=value (repeatable, @file supported)
+        /// Set or overwrite a secret field: key=value, key:=<json>, key=@file, or nested:path@file
         #[arg(long = "secret", short = 's')]
         secrets: Vec<String>,
-        /// Delete a secret field by key (repeatable)
+        /// Delete a secret field by key or nested path, e.g. old_password or credentials:content
         #[arg(long = "remove-secret")]
         remove_secrets: Vec<String>,
+        /// Output format: text (default on TTY), json, json-compact
+        #[arg(short, long = "output")]
+        output: Option<String>,
     },
 
     /// Manage CLI configuration (database connection, etc.)
@@ -252,6 +335,205 @@ enum Commands {
         #[command(subcommand)]
         action: ConfigAction,
     },
+
+    /// Show the change history for a record.
+    #[command(after_help = "EXAMPLES:
+  # Show last 20 versions for a service record
+  secrets history -n refining --kind service --name gitea
+
+  # Show last 5 versions
+  secrets history -n refining --kind service --name gitea --limit 5")]
+    History {
+        #[arg(short, long)]
+        namespace: String,
+        #[arg(long)]
+        kind: String,
+        #[arg(long)]
+        name: String,
+        /// Number of history entries to show [default: 20]
+        #[arg(long, default_value = "20")]
+        limit: u32,
+        /// Output format: text (default on TTY), json, json-compact
+        #[arg(short, long = "output")]
+        output: Option<String>,
+    },
+
+    /// Roll back a record to a previous version.
+    #[command(after_help = "EXAMPLES:
+  # Roll back to the most recent snapshot (undo last change)
+  secrets rollback -n refining --kind service --name gitea
+
+  # Roll back to a specific version number
+  secrets rollback -n refining --kind service --name gitea --to-version 3")]
+    Rollback {
+        #[arg(short, long)]
+        namespace: String,
+        #[arg(long)]
+        kind: String,
+        #[arg(long)]
+        name: String,
+        /// Target version to restore. Omit to restore the most recent snapshot.
+        #[arg(long)]
+        to_version: Option<i64>,
+        /// Output format: text (default on TTY), json, json-compact
+        #[arg(short, long = "output")]
+        output: Option<String>,
+    },
+
+    /// Print secrets as environment variables (stdout only, nothing persisted).
+    ///
+    /// Outputs KEY=VALUE pairs for all matched records. Safe to pipe or eval.
+    #[command(after_help = "EXAMPLES:
+  # Print env vars for a single service
+  secrets inject -n refining --kind service --name gitea
+
+  # With a custom prefix
+  secrets inject -n refining --kind service --name gitea --prefix GITEA
+
+  # JSON output (all vars as a JSON object)
+  secrets inject -n refining --kind service --name gitea -o json
+
+  # Eval into current shell (use with caution)
+  eval $(secrets inject -n refining --kind service --name gitea)")]
+    Inject {
+        #[arg(short, long)]
+        namespace: Option<String>,
+        #[arg(long)]
+        kind: Option<String>,
+        #[arg(long)]
+        name: Option<String>,
+        #[arg(long)]
+        tag: Vec<String>,
+        /// Prefix to prepend to every variable name (uppercased automatically)
+        #[arg(long, default_value = "")]
+        prefix: String,
+        /// Output format: text/KEY=VALUE (default), json, json-compact
+        #[arg(short, long = "output")]
+        output: Option<String>,
+    },
+
+    /// Run a command with secrets injected as environment variables.
+    ///
+    /// Secrets are available only to the child process; the current shell
+    /// environment is not modified. The process exit code is propagated.
+    #[command(after_help = "EXAMPLES:
+  # Run a script with a single service's secrets injected
+  secrets run -n refining --kind service --name gitea -- ./deploy.sh
+
+  # Run with a tag filter (all matched records merged)
+  secrets run --tag production -- env | grep GITEA
+
+  # With prefix
+  secrets run -n refining --kind service --name gitea --prefix GITEA -- printenv")]
+    Run {
+        #[arg(short, long)]
+        namespace: Option<String>,
+        #[arg(long)]
+        kind: Option<String>,
+        #[arg(long)]
+        name: Option<String>,
+        #[arg(long)]
+        tag: Vec<String>,
+        /// Prefix to prepend to every variable name (uppercased automatically)
+        #[arg(long, default_value = "")]
+        prefix: String,
+        /// Command and arguments to execute with injected environment
+        #[arg(last = true, required = true)]
+        command: Vec<String>,
+    },
+
+    /// Check for a newer version and update the binary in-place.
+    ///
+    /// Downloads the latest release and replaces the current binary. No database connection or master key required.
+    /// Release URL defaults to the upstream server; override via SECRETS_UPGRADE_URL for self-hosted or fork.
+    #[command(after_help = "EXAMPLES:
+  # Check for updates only (no download)
+  secrets upgrade --check
+
+  # Download and install the latest version
+  secrets upgrade")]
+    Upgrade {
+        /// Only check if a newer version is available; do not download
+        #[arg(long)]
+        check: bool,
+    },
+
+    /// Export records to a file (JSON, TOML, or YAML).
+    ///
+    /// Decrypts and exports all matched records. Requires master key unless --no-secrets is used.
+    #[command(after_help = "EXAMPLES:
+  # Export everything to JSON
+  secrets export --file backup.json
+
+  # Export a specific namespace to TOML
+  secrets export -n refining --file refining.toml
+
+  # Export a specific kind
+  secrets export -n refining --kind service --file services.yaml
+
+  # Export by tag
+  secrets export --tag production --file prod.json
+
+  # Export schema only (no decryption needed)
+  secrets export --no-secrets --file schema.json
+
+  # Print to stdout in YAML
+  secrets export -n refining --format yaml")]
+    Export {
+        /// Filter by namespace
+        #[arg(short, long)]
+        namespace: Option<String>,
+        /// Filter by kind, e.g. server, service
+        #[arg(long)]
+        kind: Option<String>,
+        /// Exact name filter
+        #[arg(long)]
+        name: Option<String>,
+        /// Filter by tag (repeatable)
+        #[arg(long)]
+        tag: Vec<String>,
+        /// Fuzzy keyword search
+        #[arg(short, long)]
+        query: Option<String>,
+        /// Output file path (format inferred from extension: .json / .toml / .yaml / .yml)
+        #[arg(long)]
+        file: Option<String>,
+        /// Explicit format: json, toml, or yaml (overrides file extension; required for stdout)
+        #[arg(long)]
+        format: Option<String>,
+        /// Omit secrets from output (no master key required)
+        #[arg(long)]
+        no_secrets: bool,
+    },
+
+    /// Import records from a file (JSON, TOML, or YAML).
+    ///
+    /// Reads an export file and inserts or updates entries. Requires master key to re-encrypt secrets.
+    #[command(after_help = "EXAMPLES:
+  # Import a JSON backup (conflict = error by default)
+  secrets import backup.json
+
+  # Import and overwrite existing records
+  secrets import --force refining.toml
+
+  # Preview what would be imported (no writes)
+  secrets import --dry-run backup.yaml
+
+  # JSON output for the import summary
+  secrets import backup.json -o json")]
+    Import {
+        /// Input file path (format inferred from extension: .json / .toml / .yaml / .yml)
+        file: String,
+        /// Overwrite existing records on conflict (default: error and abort)
+        #[arg(long)]
+        force: bool,
+        /// Preview operations without writing to the database
+        #[arg(long)]
+        dry_run: bool,
+        /// Output format: text (default on TTY), json, json-compact
+        #[arg(short, long = "output")]
+        output: Option<String>,
+    },
 }
 
 #[derive(Subcommand)]
@@ -269,6 +551,7 @@ enum ConfigAction {
 
 #[tokio::main]
 async fn main() -> Result<()> {
+    load_dotenv();
     let cli = Cli::parse();
 
     let filter = if cli.verbose {
@@ -281,23 +564,31 @@ async fn main() -> Result<()> {
         .with_target(false)
         .init();
 
-    // config 子命令不需要数据库连接，提前处理
-    if let Commands::Config { action } = &cli.command {
-        let cmd_action = match action {
-            ConfigAction::SetDb { url } => {
-                commands::config::ConfigAction::SetDb { url: url.clone() }
+    // config subcommand needs no database or master key
+    if let Commands::Config { action } = cli.command {
+        return commands::config::run(action).await;
     }
-            ConfigAction::Show => commands::config::ConfigAction::Show,
-            ConfigAction::Path => commands::config::ConfigAction::Path,
-        };
-        return commands::config::run(cmd_action).await;
+
+    // upgrade needs no database or master key either
+    if let Commands::Upgrade { check } = cli.command {
+        return commands::upgrade::run(check).await;
     }
 
     let db_url = config::resolve_db_url(&cli.db_url)?;
     let pool = db::create_pool(&db_url).await?;
     db::migrate(&pool).await?;
 
-    match &cli.command {
+    // init needs a pool but sets up the master key — handle before loading it
+    if let Commands::Init = cli.command {
+        return commands::init::run(&pool).await;
+    }
+
+    // All remaining commands require the master key from the OS Keychain,
+    // except delete which operates on plaintext metadata only.
+
+    match cli.command {
+        Commands::Init | Commands::Config { .. } | Commands::Upgrade { .. } => unreachable!(),
+
         Commands::Add {
             namespace,
             kind,
@@ -307,30 +598,32 @@ async fn main() -> Result<()> {
             secrets,
             output,
         } => {
+            let master_key = crypto::load_master_key()?;
             let _span =
                 tracing::info_span!("cmd", command = "add", %namespace, %kind, %name).entered();
             let out = resolve_output_mode(output.as_deref())?;
             commands::add::run(
                 &pool,
                 commands::add::AddArgs {
-                    namespace,
-                    kind,
-                    name,
-                    tags,
-                    meta_entries: meta,
-                    secret_entries: secrets,
+                    namespace: &namespace,
+                    kind: &kind,
+                    name: &name,
+                    tags: &tags,
+                    meta_entries: &meta,
+                    secret_entries: &secrets,
                     output: out,
                 },
+                &master_key,
             )
             .await?;
         }
+
         Commands::Search {
             namespace,
             kind,
             name,
             tag,
             query,
-            show_secrets,
             fields,
             summary,
             limit,
@@ -339,8 +632,6 @@ async fn main() -> Result<()> {
             output,
         } => {
             let _span = tracing::info_span!("cmd", command = "search").entered();
-            // -f implies --show-secrets when any field path starts with "secret"
-            let show = *show_secrets || fields.iter().any(|f| f.starts_with("secret"));
             let out = resolve_output_mode(output.as_deref())?;
             commands::search::run(
                 &pool,
@@ -348,28 +639,42 @@ async fn main() -> Result<()> {
                     namespace: namespace.as_deref(),
                     kind: kind.as_deref(),
                     name: name.as_deref(),
-                    tag: tag.as_deref(),
+                    tags: &tag,
                     query: query.as_deref(),
-                    show_secrets: show,
-                    fields,
-                    summary: *summary,
-                    limit: *limit,
-                    offset: *offset,
-                    sort,
+                    fields: &fields,
+                    summary,
+                    limit,
+                    offset,
+                    sort: &sort,
                     output: out,
                 },
             )
             .await?;
         }
+
         Commands::Delete {
             namespace,
             kind,
             name,
+            dry_run,
+            output,
         } => {
             let _span =
-                tracing::info_span!("cmd", command = "delete", %namespace, %kind, %name).entered();
-            commands::delete::run(&pool, namespace, kind, name).await?;
+                tracing::info_span!("cmd", command = "delete", %namespace, ?kind, ?name).entered();
+            let out = resolve_output_mode(output.as_deref())?;
+            commands::delete::run(
+                &pool,
+                commands::delete::DeleteArgs {
+                    namespace: &namespace,
+                    kind: kind.as_deref(),
+                    name: name.as_deref(),
+                    dry_run,
+                    output: out,
+                },
+            )
+            .await?;
         }
+
         Commands::Update {
             namespace,
             kind,
@@ -380,26 +685,178 @@ async fn main() -> Result<()> {
             remove_meta,
             secrets,
             remove_secrets,
+            output,
         } => {
+            let master_key = crypto::load_master_key()?;
             let _span =
                 tracing::info_span!("cmd", command = "update", %namespace, %kind, %name).entered();
+            let out = resolve_output_mode(output.as_deref())?;
             commands::update::run(
                 &pool,
                 commands::update::UpdateArgs {
+                    namespace: &namespace,
+                    kind: &kind,
+                    name: &name,
+                    add_tags: &add_tags,
+                    remove_tags: &remove_tags,
+                    meta_entries: &meta,
+                    remove_meta: &remove_meta,
+                    secret_entries: &secrets,
+                    remove_secrets: &remove_secrets,
+                    output: out,
+                },
+                &master_key,
+            )
+            .await?;
+        }
+
+        Commands::History {
             namespace,
             kind,
             name,
-                    add_tags,
-                    remove_tags,
-                    meta_entries: meta,
-                    remove_meta,
-                    secret_entries: secrets,
-                    remove_secrets,
+            limit,
+            output,
+        } => {
+            let out = resolve_output_mode(output.as_deref())?;
+            commands::history::run(
+                &pool,
+                commands::history::HistoryArgs {
+                    namespace: &namespace,
+                    kind: &kind,
+                    name: &name,
+                    limit,
+                    output: out,
                 },
             )
             .await?;
         }
-        Commands::Config { .. } => unreachable!(),
+
+        Commands::Rollback {
+            namespace,
+            kind,
+            name,
+            to_version,
+            output,
+        } => {
+            let master_key = crypto::load_master_key()?;
+            let out = resolve_output_mode(output.as_deref())?;
+            commands::rollback::run(
+                &pool,
+                commands::rollback::RollbackArgs {
+                    namespace: &namespace,
+                    kind: &kind,
+                    name: &name,
+                    to_version,
+                    output: out,
+                },
+                &master_key,
+            )
+            .await?;
+        }
+
+        Commands::Inject {
+            namespace,
+            kind,
+            name,
+            tag,
+            prefix,
+            output,
+        } => {
+            let master_key = crypto::load_master_key()?;
+            let out = resolve_output_mode(output.as_deref())?;
+            commands::run::run_inject(
+                &pool,
+                commands::run::InjectArgs {
+                    namespace: namespace.as_deref(),
+                    kind: kind.as_deref(),
+                    name: name.as_deref(),
+                    tags: &tag,
+                    prefix: &prefix,
+                    output: out,
+                },
+                &master_key,
+            )
+            .await?;
+        }
+
+        Commands::Run {
+            namespace,
+            kind,
+            name,
+            tag,
+            prefix,
+            command,
+        } => {
+            let master_key = crypto::load_master_key()?;
+            commands::run::run_exec(
+                &pool,
+                commands::run::RunArgs {
+                    namespace: namespace.as_deref(),
+                    kind: kind.as_deref(),
+                    name: name.as_deref(),
+                    tags: &tag,
+                    prefix: &prefix,
+                    command: &command,
+                },
+                &master_key,
+            )
+            .await?;
+        }
+
+        Commands::Export {
+            namespace,
+            kind,
+            name,
+            tag,
+            query,
+            file,
+            format,
+            no_secrets,
+        } => {
+            let master_key = if no_secrets {
+                None
+            } else {
+                Some(crypto::load_master_key()?)
+            };
+            let _span = tracing::info_span!("cmd", command = "export").entered();
+            commands::export_cmd::run(
+                &pool,
+                commands::export_cmd::ExportArgs {
+                    namespace: namespace.as_deref(),
+                    kind: kind.as_deref(),
+                    name: name.as_deref(),
+                    tags: &tag,
+                    query: query.as_deref(),
+                    file: file.as_deref(),
+                    format: format.as_deref(),
+                    no_secrets,
+                },
+                master_key.as_ref(),
+            )
+            .await?;
+        }
+
+        Commands::Import {
+            file,
+            force,
+            dry_run,
+            output,
+        } => {
+            let master_key = crypto::load_master_key()?;
+            let _span = tracing::info_span!("cmd", command = "import").entered();
+            let out = resolve_output_mode(output.as_deref())?;
+            commands::import_cmd::run(
+                &pool,
+                commands::import_cmd::ImportArgs {
+                    file: &file,
+                    force,
+                    dry_run,
+                    output: out,
+                },
+                &master_key,
+            )
+            .await?;
+        }
     }
 
     Ok(())

src/models.rs

@@ -1,17 +1,219 @@
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
+use std::collections::BTreeMap;
 use uuid::Uuid;
 
+/// A top-level entry (server, service, key, …).
+/// Sensitive fields are stored separately in `secrets`.
 #[derive(Debug, Serialize, Deserialize, sqlx::FromRow)]
-pub struct Secret {
+pub struct Entry {
     pub id: Uuid,
     pub namespace: String,
     pub kind: String,
     pub name: String,
     pub tags: Vec<String>,
     pub metadata: Value,
-    pub encrypted: Value,
+    pub version: i64,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
 }
+
+/// A single encrypted field belonging to an Entry.
+/// field_name, field_type, and value_len are stored in plaintext so that
+/// `search` can show the schema without requiring the master key.
+#[derive(Debug, Serialize, Deserialize, sqlx::FromRow)]
+pub struct SecretField {
+    pub id: Uuid,
+    pub entry_id: Uuid,
+    pub field_name: String,
+    /// Inferred type: "string", "number", "boolean", "json"
+    pub field_type: String,
+    /// Length of the plaintext value in characters (0 for binary-like PEM)
+    pub value_len: i32,
+    /// AES-256-GCM ciphertext: nonce(12B) || ciphertext+tag
+    pub encrypted: Vec<u8>,
+    pub version: i64,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+// ── Internal query row types (shared across commands) ─────────────────────────
+
+/// Minimal entry row fetched for write operations (add / update / delete / rollback).
+#[derive(Debug, sqlx::FromRow)]
+pub struct EntryRow {
+    pub id: Uuid,
+    pub version: i64,
+    pub tags: Vec<String>,
+    pub metadata: Value,
+}
+
+/// Minimal secret field row fetched before snapshots or cascade deletes.
+#[derive(Debug, sqlx::FromRow)]
+pub struct SecretFieldRow {
+    pub id: Uuid,
+    pub field_name: String,
+    pub field_type: String,
+    pub value_len: i32,
+    pub encrypted: Vec<u8>,
+}
+
+// ── Export / Import types ──────────────────────────────────────────────────────
+
+/// Supported file formats for export/import.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum ExportFormat {
+    Json,
+    Toml,
+    Yaml,
+}
+
+impl ExportFormat {
+    /// Infer format from file extension (.json / .toml / .yaml / .yml).
+    pub fn from_extension(path: &str) -> anyhow::Result<Self> {
+        let ext = path.rsplit('.').next().unwrap_or("").to_lowercase();
+        Self::from_str(&ext).map_err(|_| {
+            anyhow::anyhow!(
+                "Cannot infer format from extension '.{}'. Use --format json|toml|yaml",
+                ext
+            )
+        })
+    }
+
+    /// Parse from --format CLI value.
+    pub fn from_str(s: &str) -> anyhow::Result<Self> {
+        match s.to_lowercase().as_str() {
+            "json" => Ok(Self::Json),
+            "toml" => Ok(Self::Toml),
+            "yaml" | "yml" => Ok(Self::Yaml),
+            other => anyhow::bail!("Unknown format '{}'. Expected: json, toml, or yaml", other),
+        }
+    }
+
+    /// Serialize ExportData to a string in this format.
+    pub fn serialize(&self, data: &ExportData) -> anyhow::Result<String> {
+        match self {
+            Self::Json => Ok(serde_json::to_string_pretty(data)?),
+            Self::Toml => {
+                let toml_val = json_to_toml_value(&serde_json::to_value(data)?)?;
+                toml::to_string_pretty(&toml_val)
+                    .map_err(|e| anyhow::anyhow!("TOML serialization failed: {}", e))
+            }
+            Self::Yaml => serde_yaml::to_string(data)
+                .map_err(|e| anyhow::anyhow!("YAML serialization failed: {}", e)),
+        }
+    }
+
+    /// Deserialize ExportData from a string in this format.
+    pub fn deserialize(&self, content: &str) -> anyhow::Result<ExportData> {
+        match self {
+            Self::Json => Ok(serde_json::from_str(content)?),
+            Self::Toml => {
+                let toml_val: toml::Value = toml::from_str(content)
+                    .map_err(|e| anyhow::anyhow!("TOML parse error: {}", e))?;
+                let json_val = toml_to_json_value(&toml_val);
+                Ok(serde_json::from_value(json_val)?)
+            }
+            Self::Yaml => serde_yaml::from_str(content)
+                .map_err(|e| anyhow::anyhow!("YAML parse error: {}", e)),
+        }
+    }
+}
+
+/// Top-level structure for export/import files.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct ExportData {
+    pub version: u32,
+    pub exported_at: String,
+    pub entries: Vec<ExportEntry>,
+}
+
+/// A single entry with decrypted secrets for export/import.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct ExportEntry {
+    pub namespace: String,
+    pub kind: String,
+    pub name: String,
+    #[serde(default)]
+    pub tags: Vec<String>,
+    #[serde(default)]
+    pub metadata: Value,
+    /// Decrypted secret fields. None means no secrets in this export (--no-secrets).
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub secrets: Option<BTreeMap<String, Value>>,
+}
+
+// ── TOML ↔ JSON value conversion ──────────────────────────────────────────────
+
+/// Convert a serde_json Value to a toml Value.
+/// `null` values are filtered out (TOML does not support null).
+/// Mixed-type arrays are serialised as JSON strings.
+pub fn json_to_toml_value(v: &Value) -> anyhow::Result<toml::Value> {
+    match v {
+        Value::Null => anyhow::bail!("TOML does not support null values"),
+        Value::Bool(b) => Ok(toml::Value::Boolean(*b)),
+        Value::Number(n) => {
+            if let Some(i) = n.as_i64() {
+                Ok(toml::Value::Integer(i))
+            } else if let Some(f) = n.as_f64() {
+                Ok(toml::Value::Float(f))
+            } else {
+                anyhow::bail!("unsupported number: {}", n)
+            }
+        }
+        Value::String(s) => Ok(toml::Value::String(s.clone())),
+        Value::Array(arr) => {
+            let items: anyhow::Result<Vec<toml::Value>> =
+                arr.iter().map(json_to_toml_value).collect();
+            match items {
+                Ok(vals) => Ok(toml::Value::Array(vals)),
+                Err(e) => {
+                    tracing::debug!(error = %e, "mixed-type array; falling back to JSON string");
+                    Ok(toml::Value::String(serde_json::to_string(v)?))
+                }
+            }
+        }
+        Value::Object(map) => {
+            let mut toml_map = toml::map::Map::new();
+            for (k, val) in map {
+                if val.is_null() {
+                    // Skip null entries
+                    continue;
+                }
+                match json_to_toml_value(val) {
+                    Ok(tv) => {
+                        toml_map.insert(k.clone(), tv);
+                    }
+                    Err(e) => {
+                        tracing::debug!(key = %k, error = %e, "field not representable in TOML; falling back to JSON string");
+                        toml_map
+                            .insert(k.clone(), toml::Value::String(serde_json::to_string(val)?));
+                    }
+                }
+            }
+            Ok(toml::Value::Table(toml_map))
+        }
+    }
+}
+
+/// Convert a toml Value back to a serde_json Value.
+pub fn toml_to_json_value(v: &toml::Value) -> Value {
+    match v {
+        toml::Value::Boolean(b) => Value::Bool(*b),
+        toml::Value::Integer(i) => Value::Number((*i).into()),
+        toml::Value::Float(f) => serde_json::Number::from_f64(*f)
+            .map(Value::Number)
+            .unwrap_or(Value::Null),
+        toml::Value::String(s) => Value::String(s.clone()),
+        toml::Value::Datetime(dt) => Value::String(dt.to_string()),
+        toml::Value::Array(arr) => Value::Array(arr.iter().map(toml_to_json_value).collect()),
+        toml::Value::Table(map) => {
+            let obj: serde_json::Map<String, Value> = map
+                .iter()
+                .map(|(k, v)| (k.clone(), toml_to_json_value(v)))
+                .collect();
+            Value::Object(obj)
+        }
+    }
+}

src/output.rs

@@ -1,3 +1,4 @@
+use chrono::{DateTime, Local, Utc};
 use std::io::IsTerminal;
 use std::str::FromStr;
 
@@ -11,8 +12,6 @@ pub enum OutputMode {
     Json,
     /// Single-line JSON (default when stdout is NOT a TTY, e.g. piped to jq)
     JsonCompact,
-    /// KEY=VALUE pairs suitable for `source` or `.env` files
-    Env,
 }
 
 impl FromStr for OutputMode {
@@ -23,9 +22,8 @@ impl FromStr for OutputMode {
             "text" => Ok(Self::Text),
             "json" => Ok(Self::Json),
             "json-compact" => Ok(Self::JsonCompact),
-            "env" => Ok(Self::Env),
             other => Err(anyhow::anyhow!(
-                "Unknown output format '{}'. Valid: text, json, json-compact, env",
+                "Unknown output format '{}'. Valid: text, json, json-compact",
                 other
             )),
         }
@@ -45,3 +43,23 @@ pub fn resolve_output_mode(explicit: Option<&str>) -> anyhow::Result<OutputMode>
         Ok(OutputMode::JsonCompact)
     }
 }
+
+/// Format a UTC timestamp for local human-readable output.
+pub fn format_local_time(dt: DateTime<Utc>) -> String {
+    dt.with_timezone(&Local)
+        .format("%Y-%m-%d %H:%M:%S %:z")
+        .to_string()
+}
+
+/// Print a JSON value to stdout in the requested output mode.
+/// - `Json`        → pretty-printed
+/// - `JsonCompact` → single line
+/// - `Text`        → no-op (caller is responsible for the text branch)
+pub fn print_json(value: &serde_json::Value, mode: &OutputMode) -> anyhow::Result<()> {
+    match mode {
+        OutputMode::Json => println!("{}", serde_json::to_string_pretty(value)?),
+        OutputMode::JsonCompact => println!("{}", serde_json::to_string(value)?),
+        OutputMode::Text => {}
+    }
+    Ok(())
+}

test-fixtures/example-key.pem

@@ -0,0 +1,3 @@
+-----BEGIN EXAMPLE KEY PLACEHOLDER-----
+This file is for local dev/testing. Replace with a real key when needed.
+-----END EXAMPLE KEY PLACEHOLDER-----