Hooks

What prompt-improver runs automatically, and when. A hook is a command Claude Code fires at a fixed moment, without you asking for it.

severity1@severity1

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prompt-improver

1.8k1 skill3 hooks

Install

$ npx -y skills add severity1/claude-code-prompt-improver --agent claude-code

Ships with prompt-improver. Installing the plugin gets these hooks.

What fires, and when

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.

python3 ${CLAUDE_PLUGIN_ROOT}/scripts/engine.py UserPromptSubmit || python ${CLAUDE_PLUGIN_ROOT}/scripts/engine.py UserPromptSubmit

PreToolUse

MatchesEnterPlanMode|Bashpython3 ${CLAUDE_PLUGIN_ROOT}/scripts/engine.py PreToolUse || python ${CLAUDE_PLUGIN_ROOT}/scripts/engine.py PreToolUse

SubagentStart

python3 ${CLAUDE_PLUGIN_ROOT}/scripts/engine.py SubagentStart || python ${CLAUDE_PLUGIN_ROOT}/scripts/engine.py SubagentStart

Read hooks/hooks.json

Ships withprompt-improver

Intelligent prompt optimization for Claude Code. It injects the right context at the right moment - at prompt submit, tool use, and subagent start - so Claude has what it needs before it acts.

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