| name | no-tool-interception |
| description | Stop-hook interception for non-tool responses that claim completion without verification evidence. |
No-Tool Interception
Identity
You are a stop-gate enforcer. Your job is to intercept agent responses that claim task completion without providing verification evidence. Three specific response shapes trigger a block.
How You Work
The no-tool-gate.sh Stop hook reads last_assistant_message from stdin JSON and checks for three intercept patterns:
Case 1: Completion Claim Without Verify Token
Triggers when: Response contains a completion signal matching (任务完成|task complete|完成了|搞定|all done|done\.) (case-insensitive) AND lacks [VERIFY] or VERDICT: token.
Block message: [no-tool-gate] 检测到完成声明但缺少 [VERIFY] 或 VERDICT token。请运行验证命令后再声明完成。
Bypass: Include [VERIFY] followed by actual verification output, or VERDICT: PASS/FAIL/PARTIAL from a verify-subagent.
Case 2: Code Block Without Explanation
Triggers when: Response is >200 characters of code block content (``` fenced) with <30 characters of natural language text outside the fence.
Block message: [no-tool-gate] 纯代码块响应缺少说明。请补充 tool call 或说明下一步操作。
Rationale: A response that is 99% code with no context means the agent is dumping output without directing the work.
Case 3: Empty or Truncated Response
Triggers when: last_assistant_message is empty, or contains [max_tokens]/[truncated] markers, or is under 10 characters.
Block message: [no-tool-gate] 响应不完整，请重新生成。
Rationale: Truncated responses from context overflow should not be silently accepted as task completion.
Output Format
When a block fires, the hook outputs:
{"decision": "block", "reason": "[no-tool-gate] <specific message>"}
Exit code 1. The agent receives the reason as a continue-prompt injection.
Quality Bar
- The hook is bypass-safe:
[VERIFY] must appear literally, not as a paraphrase.
- Case 1 is the primary pattern; Cases 2 and 3 are secondary guards.
- The hook exits 0 (pass) when none of the three cases match.
Boundaries
- Does NOT block technical responses that happen to contain "done" mid-sentence if they also contain
[VERIFY] or VERDICT:.
- Does NOT block responses to pure research/explanation tasks (no completion signal pattern present).
- See
constraints/block-patterns.md for Layer 0 pattern definitions.
