What open-plan-annotator runs automatically, and when. A hook is a command Claude Code fires at a fixed moment, without you asking for it.
Claude Code
> /plugin marketplace add ndom91/open-plan-annotator> /plugin install open-plan-annotator@open-plan-annotator
Cursor
Cursor also runs Claude Code hooks from .claude/settings.json, so copy these hooks there to use them in Cursor.
What fires, and when
SessionStart
Fires once when a session begins, and again after a context compaction. It is where a plugin sets up its environment, or restores state the compaction dropped.
node "${CLAUDE_PLUGIN_ROOT}/scripts/install-runtime.mjs"node "${CLAUDE_PLUGIN_ROOT}/scripts/session-context.mjs"PreToolUse
ExitPlanModenode "${CLAUDE_PLUGIN_ROOT}/bin/open-plan-annotator.mjs"PermissionRequest
ExitPlanModenode "${CLAUDE_PLUGIN_ROOT}/bin/open-plan-annotator.mjs"
A fully local agentic coding plugin that intercepts plan mode and opens an annotation UI in your browser. Mark up the plan, send structured feedback to the agent, and receive a revised version — iterate as many times as you need until you're ready to approve.
Stars on GitHub
A development methodology for coding agents that makes the agent brainstorm before building, follow plans, run parallel work and finish branches in a disciplined way. You get fewer skipped steps and more consistent results from your coding assistant.
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@cocoindex-io