Hooks
What povvo-claudikins-kernel-elb-pr-claudikins-kernel runs automatically, and when. A hook is a command Claude Code fires at a fixed moment, without you asking for it.
$ npx -y skills add elb-pr/claudikins-kernel --agent claude-codeShips with povvo-claudikins-kernel-elb-pr-claudikins-kernel. Installing the plugin gets these hooks.
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.
- Runs session-startup.sh.
UserPromptSubmit
Fires before Claude sees each prompt you send. A plugin can use it to inject context, so the same instruction reaches the model every turn instead of only at session start.
- Runs skill-activation-hook.sh.
SubagentStart
- Runs trace-start.sh.
SubagentStop
- Runs trace-end.sh.
PreToolUse
- Runs git-branch-guard.sh.
PostToolUse
- Runs autoformat.sh.
Stop
- Runs verify-gate.sh.
PreCompact
- Runs preserve-state.sh.
Where it lives
- hooks/autoformat.shGitHub
- hooks/batch-checkpoint-gate.shGitHub
- hooks/block-git-commands.shGitHub
- hooks/capture-catastrophiser.shGitHub
- hooks/capture-cynic.shGitHub
- hooks/capture-perfectionist.shGitHub
- hooks/capture-research.shGitHub
- hooks/cleanup-task-worktree.shGitHub
- hooks/create-task-branch.shGitHub
- hooks/execute-status.shGitHub
- hooks/execute-tracker.shGitHub
- hooks/git-branch-guard.shGitHub
- hooks/merge-gate.shGitHub
- hooks/pre-task-gate.shGitHub
- hooks/preserve-state.shGitHub
- hooks/sanitize-bash.shGitHub
- hooks/session-startup.shGitHub
- hooks/ship-complete.shGitHub
- hooks/ship-init.shGitHub
- hooks/skill-activation-hook.shGitHub
- hooks/task-completion-capture.shGitHub
- hooks/trace-end.shGitHub
- hooks/trace-start.shGitHub
- hooks/validate-plan-completion.shGitHub
- hooks/validate-plan-format.shGitHub
- hooks/verify-gate.shGitHub
- hooks/verify-init.shGitHub
Showing the source of 6 of 27 scripts. Every one is linked above.
Read the script before you install anything that runs on your machine. This is the one part of a plugin that acts without being asked.
SRE thinking applied to Claude Code, based on Boris Cherny's Q&A. It enforces a strict 4-stage pipeline with gates between each step. You literally cannot skip verification. You cannot ship without approval.