feat(tools): add minio prefix sync into memory

docs/api/TOOLS.md

@@ -27,7 +27,7 @@ Tools are executable capabilities that the AI agent can call to perform actions
 - **Web**: `web.fetch`, `web.search`
 - **Browser**: `browser.navigate`, `browser.screenshot`
 - **Memory**: `memory.read`, `memory.write`, `memory.search`
-- **MinIO**: `minio.share`, `minio.ingest`
+- **MinIO**: `minio.share`, `minio.ingest`, `minio.sync`
 - **Media**: `media.send`, `image.analyze`, `audio.transcribe`
 - **System**: `system.info`
 - **Session**: `sessions.list`, `sessions.delete`
@@ -1007,6 +1007,52 @@ Read a text-like object from MinIO and write it into a memory namespace.
 }
 ```
 
+#### `minio.sync`
+
+Sync text-like objects from a MinIO prefix into nested memory namespaces.
+
+```json
+{
+  "name": "minio.sync",
+  "description": "Sync text-like objects from a MinIO prefix into memory namespaces.",
+  "inputSchema": {
+    "type": "object",
+    "properties": {
+      "prefix": {
+        "type": "string",
+        "description": "MinIO object prefix to sync recursively"
+      },
+      "bucket": {
+        "type": "string",
+        "description": "Optional bucket override"
+      },
+      "namespace_base": {
+        "type": "string",
+        "description": "Base memory namespace"
+      },
+      "mode": {
+        "type": "string",
+        "enum": ["append", "replace"],
+        "description": "Write mode per object namespace"
+      },
+      "max_objects": {
+        "type": "number",
+        "description": "Maximum objects to ingest in one run"
+      },
+      "max_chars_per_object": {
+        "type": "number",
+        "description": "Maximum characters per object"
+      },
+      "force": {
+        "type": "boolean",
+        "description": "Override non-text extension/content safety checks"
+      }
+    },
+    "required": ["prefix"]
+  }
+}
+```
+
 ### Media Tools
 
 #### `media.send`

docs/plans/state.json

@@ -80,6 +80,25 @@
       ],
       "test_status": "pnpm test:run src/tools/builtin/minio-ingest.test.ts src/tools/policy.test.ts + pnpm typecheck passing"
     },
+    "minio-prefix-sync-tool": {
+      "status": "completed",
+      "date": "2026-02-16",
+      "updated": "2026-02-16",
+      "summary": "Added `minio.sync` tool to recursively ingest MinIO prefixes into nested memory namespaces with per-run object limits, per-object content limits, extension/content safety checks, and summary output. Registered tool with MinIO+memory runtime, expanded `group:minio` policy coverage, and updated docs/tests.",
+      "files_modified": [
+        "src/tools/builtin/minio-sync.ts",
+        "src/tools/builtin/minio-sync.test.ts",
+        "src/tools/builtin/index.ts",
+        "src/tools/index.ts",
+        "src/daemon/index.ts",
+        "src/tools/policy.ts",
+        "src/tools/policy.test.ts",
+        "README.md",
+        "docs/api/TOOLS.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/tools/builtin/minio-sync.test.ts src/tools/policy.test.ts + pnpm typecheck passing"
+    },
     "backup-session-summary-audit-trail": {
       "status": "completed",
       "date": "2026-02-16",