feat(tools): add pdf extraction for minio ingestion

docs/api/TOOLS.md

@@ -968,7 +968,7 @@ Upload a local file to MinIO and return a temporary presigned download URL.
 
 #### `minio.ingest`
 
-Read a text-like object from MinIO and write it into a memory namespace.
+Read a text-like object from MinIO (and PDFs when `pdftotext` is available) and write it into a memory namespace.
 
 ```json
 {
@@ -1010,7 +1010,7 @@ 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.
+Sync text-like objects from a MinIO prefix into nested memory namespaces (with PDF extraction when available).
 
 ```json
 {

docs/plans/state.json

@@ -141,6 +141,22 @@
       ],
       "test_status": "pnpm test:run src/tools/builtin/k8s.test.ts src/tools/policy.test.ts src/config/schema.test.ts + pnpm typecheck passing"
     },
+    "minio-pdf-ingestion-support": {
+      "status": "completed",
+      "date": "2026-02-16",
+      "updated": "2026-02-16",
+      "summary": "Extended MinIO knowledge ingestion to support PDF documents via `pdftotext` extraction in both `minio.ingest` and `minio.sync` paths (when available), while preserving text-safety checks for other binary formats. Updated tests and docs accordingly.",
+      "files_modified": [
+        "src/tools/builtin/minio-ingest.ts",
+        "src/tools/builtin/minio-sync.ts",
+        "src/tools/builtin/minio-ingest.test.ts",
+        "src/tools/builtin/minio-sync.test.ts",
+        "README.md",
+        "docs/api/TOOLS.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/tools/builtin/minio-ingest.test.ts src/tools/builtin/minio-sync.test.ts + pnpm typecheck passing"
+    },
     "backup-session-summary-audit-trail": {
       "status": "completed",
       "date": "2026-02-16",