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test: port additional SubagentStart matcher coverage from #522 - #699

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dhedhialy wants to merge 3 commits into
DietrichGebert:mainfrom
dhedhialy:fix/506-subagent-matcher
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test: port additional SubagentStart matcher coverage from #522#699
dhedhialy wants to merge 3 commits into
DietrichGebert:mainfrom
dhedhialy:fix/506-subagent-matcher

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Ports matcher coverage for SubagentStart from #522.

dhedhialy added 3 commits July 7, 2026 06:50
Adds PONYTAIL_SUBAGENT_MATCHER env var support to the SubagentStart hook.
When set, the hook reads agent_type from stdin and only injects ponytail
instructions when the agent type matches the regex. Opt-in by default
(no env var = inject all subagents, preserving backward compatibility).

Fixes DietrichGebert#506
…docs

Three fixes per review feedback on PR DietrichGebert#507:
1. No-matcher path stays synchronous and stdin-independent (no Windows regression)
2. Regex construction is guarded by try/catch so invalid regex doesn't crash
3. PONYTAIL_SUBAGENT_MATCHER documented in README.md alongside DEFAULT_MODE

Also added test coverage for invalid regex and absent agent_type (fail-open).
…ert#522

Adds three test cases and the harness-hygiene delete per review feedback:
- case-insensitive unanchored match (General-purpose against general|plan)
- anchored ^general$ rejecting superset general-purpose
- no-matcher path with empty stdin (proves DietrichGebert#443 Windows fix)
- delete process.env.PONYTAIL_SUBAGENT_MATCHER to prevent CI env leaks
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