Gemini CLI uses AfterTool as the post-tool hook event name, not
PostToolUse (which is Claude Code's event name). The installer was
registering the context monitor under PostToolUse for all runtimes,
causing Gemini to print "Invalid hook event name" warnings on every
run and silently disabling the context monitor.
Changes:
- install.js: use runtime-aware event name (AfterTool for Gemini,
PostToolUse for others) when registering context monitor hook
- install.js: uninstall cleans up both PostToolUse and AfterTool
entries for backward compatibility with existing installs
- gsd-context-monitor.js: runtime-aware hookEventName in output
- docs/context-monitor.md: document both event names with Gemini
example
Closes#750
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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