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Agent Skill

Hook Developer skill

hook-developerparcadei/Continuous-Claude-v3.claude/skills/hook-developer/SKILL.md

Complete Claude Code hooks reference - input/output schemas, registration, testing patterns

3.9kMIT

always on

18 tokname + description

once used

3,970 tokSKILL.md body

bundled files

0

repo stars

3.9kGitHub

Install the Hook Developer skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/parcadei/Continuous-Claude-v3 --skill hook-developer

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git /tmp/Continuous-Claude-v3
mkdir -p ~/.claude/skills
cp -R /tmp/Continuous-Claude-v3/.claude/skills/hook-developer ~/.claude/skills/hook-developer

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

WhenWhat loadsCost
Every sessionName and description18 tok
When the agent uses itThe SKILL.md instructions3,970 tok
Only if openedNo bundled files—

Until it is used, hook-developer costs about 76× less than the median MCP server we measured (1,363 tokens on every turn). Installing all 150 skills from parcadei/Continuous-Claude-v3 would load 2,175 tokens of descriptions. Skills vs MCP study

Checks

  • The instructions are over 500 lines; the specification suggests moving detail into reference files.

Checked 2026-10-22 · method

What's inside

The headings of its SKILL.md. Read the full file on GitHub.

  • Hook Developer
  • When to Use
  • Quick Reference
  • Hook Input/Output Schemas
  • PreToolUse
  • PostToolUse
  • UserPromptSubmit
  • PermissionRequest
  • SessionStart
  • SessionEnd
  • Stop
  • SubagentStart
  • SubagentStop
  • PreCompact
  • Notification
  • Registration in settings.json
  • Standard Structure
  • Matcher Patterns
  • Events Requiring Matchers
  • Events Without Matchers
  • Hook Types
  • Command Hooks (type: "command")
  • Prompt-Based Hooks (type: "prompt")
  • MCP Tool Naming

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