diff --git a/patterns/archetypes/repo-qa-assistant.json b/patterns/archetypes/repo-qa-assistant.json
new file mode 100644
index 0000000..1d8206a
--- /dev/null
+++ b/patterns/archetypes/repo-qa-assistant.json
@@ -0,0 +1,34 @@
+{
+  "id": "repo-qa-assistant",
+  "label": "Repo Q&A Assistant",
+  "description": "Answer ad hoc questions about the repository via a slash command, posting the result as a comment",
+  "success_rate": null,
+  "count": 0,
+  "recommended_triggers": [
+    {
+      "type": "slash_command",
+      "config": {}
+    }
+  ],
+  "recommended_safe_outputs": [
+    "add-comment"
+  ],
+  "recommended_tools": [
+    "add-comment"
+  ],
+  "timeout_minutes": 20,
+  "prompt_style": "role-steps",
+  "size_range_bytes": [
+    1500,
+    5000
+  ],
+  "top_repos": [],
+  "tips": [
+    "Use a reaction (e.g. eyes) alongside slash_command so requesters get immediate acknowledgement while the agent works",
+    "Grant read-only permissions and rely on bash/web-fetch tools for investigation instead of write access",
+    "Set tools.github.min-integrity: none so the assistant can read any issue or pull request context regardless of author trust, since it only answers questions",
+    "Cap add-comment at max: 1 so a single consolidated answer is posted instead of a running commentary",
+    "Keep answers scoped to the triggering issue/PR content and repository inspection — avoid speculative external claims"
+  ],
+  "anti_patterns": []
+}
diff --git a/patterns/manifest.json b/patterns/manifest.json
index 44faef7..14a9f46 100644
--- a/patterns/manifest.json
+++ b/patterns/manifest.json
@@ -31,7 +31,8 @@
     "community-digest",
     "agent-cost-tracker",
     "contribution-guidelines-checker",
-    "link-checker"
+    "link-checker",
+    "repo-qa-assistant"
   ],
   "workflow_generation": "workflow-generation.json",
   "anti_patterns": [
diff --git a/patterns/workflow-generation.json b/patterns/workflow-generation.json
index 1d4710f..53d4d4b 100644
--- a/patterns/workflow-generation.json
+++ b/patterns/workflow-generation.json
@@ -1084,6 +1084,40 @@
         "- **DO NOT** modify relative links or anchors — only HTTP(S) links.",
         "- **DO NOT** retry links already recorded as unfixable in cache memory without new evidence."
       ]
+    },
+    "repo-qa-assistant": {
+      "icon": "comment-discussion",
+      "capabilities": {
+        "bash": true,
+        "web_fetch": true,
+        "github_toolsets": true
+      },
+      "permissions": [
+        "contents",
+        "issues",
+        "pull-requests"
+      ],
+      "github_toolsets": [
+        "default"
+      ],
+      "body": [
+        "# {{label}}",
+        "",
+        "You are a **repository question-answering assistant** invoked via a slash command in an issue or pull request comment.",
+        "",
+        "## Process",
+        "",
+        "1. Read the triggering comment and the surrounding issue/PR context",
+        "2. Investigate the repository (code, docs, history) using bash and web-fetch as needed to answer accurately",
+        "3. Compose a single, concise, accurate answer grounded in what you found",
+        "4. Post the answer as one comment on the triggering thread",
+        "",
+        "## Constraints",
+        "",
+        "- **DO NOT** make repository changes — this workflow only answers questions.",
+        "- **DO NOT** post more than one comment per invocation.",
+        "- **DO NOT** assert claims you could not verify from the repository or trusted sources."
+      ]
     }
   }
 }