Detect double governance (two PreToolUse hooks) - #12
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Found in the wild 2026-08-14 — a v0.3.0 marketplace copy from April still firing beside the current hook, doubling gateway load and so the scale-out latency tail that turns a slow answer into a fail-closed deny (gatewaystack-connect#690), from a code path nobody had read in four months. Detect and report, never delete: hook wiring is governance config and that stays the operator's to change. Printing the exact command is the whole job.
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Warns when both the installer's settings.json hook and the marketplace plugin's hooks.json are registered — each calls /govern/tool-use on every tool call. Reports the plugin copy's version and prints both remediation commands; never edits hook config itself (#403). Verified firing against a real duplicated machine; bash -n clean. Refs davidcrowe/gatewaystack-connect#690.