Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add mike-coulbourn/claude-vibes/plugin install claude-vibesWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mike-coulbourn/claude-vibes/hooks-builder)<a href="https://agentmods.dev/skills/mike-coulbourn/claude-vibes/hooks-builder"><img src="https://agentmods.dev/badge/skills/mike-coulbourn/claude-vibes/hooks-builder/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mike-coulbourn/claude-vibes/hooks-builder"><img src="https://agentmods.dev/badge/skills/mike-coulbourn/claude-vibes/hooks-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00065 | $0.03295 |
| Opus 5 | $0.00032 | $0.01648 |
| Sonnet 5 | $0.00013 | $0.00659 |
| Haiku 4.5 | $0.00006 | $0.00330 |
Grade B, and why
hooks-builder scanned grade B with 3 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks for rootlowPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
- [ ] No sudo or privilege escalation Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Reads agent configuration directorieslowAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
~/.claude/settings.json → Personal hooks (all projects) Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Recursive force deletemediumDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
- Malicious inputs: `{"tool_input": {"file_path": "; rm -rf /"}}` Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 509 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hooks Builder
A comprehensive guide for creating Claude Code hooks — event-driven automation that monitors and controls Claude's actions.
Quick Reference
The 10 Hook Events
| Event | When It Fires | Can Block? | Supports Matchers? |
|---|---|---|---|
| PreToolUse | Before tool executes | YES | YES (tool names) |
| PermissionRequest | Permission dialog shown | YES | YES (tool names) |
| PostToolUse | After tool succeeds | No | YES (tool names) |
| Notification | Claude sends notification | No | YES |
| UserPromptSubmit | User submits prompt | YES | No |
| Stop | Claude finishes responding | Can force continue | No |
| SubagentStop | Subagent finishes | Can force continue | No |
| PreCompact | Before context compaction | No | YES (manual/auto) |
| SessionStart | Session begins | No | YES (startup/resume/clear/compact) |
| SessionEnd | Session ends | No | No |
Exit Code Semantics
| Exit Code | Meaning | Effect |
|---|---|---|
| 0 | Success | stdout parsed as JSON for control |
| 2 | Blocking error | VETO — stderr shown to Claude |
| Other | Non-blocking error | stderr logged in debug mode |
Configuration Locations
~/.claude/settings.json → Personal hooks (all projects)
.claude/settings.json → Project hooks (team, committed)
.claude/settings.local.json → Local overrides (not committed)
Essential Environment Variables
| Variable | Description |
|---|---|
$CLAUDE_PROJECT_DIR |
Project root directory |
$CLAUDE_CODE_REMOTE |
Remote/local indicator |
$CLAUDE_ENV_FILE |
Environment persistence path (SessionStart) |
$CLAUDE_PLUGIN_ROOT |
Plugin directory (plugin hooks) |
Key Commands
/hooks # View active hooks
claude --debug # Enable debug logging
chmod +x script.sh # Make script executable
6-Phase Workflow
Phase 1: Requirements Gathering
What ships with it
11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- examples/quality-hooks.md 20 KB
- examples/security-hooks.md 24 KB
- examples/workflow-hooks.md 25 KB
- reference/best-practices.md 13 KB
- reference/syntax-guide.md 12 KB
- reference/troubleshooting.md 12 KB
- templates/basic-hook.md 7.6 KB
- templates/production-hooks.md 19 KB
- templates/with-decisions.md 15 KB
- templates/with-prompts.md 11 KB
- templates/with-scripts.md 11 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 509 lines · 65 tokens per session scan B cfe088d36f25
hooks-builder is a skill published in the GitHub repository mike-coulbourn/claude-vibes (39 stars, last pushed 8mo ago), licensed MIT. It adds 65 tokens to every session and 3,295 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 3 findings (asks for root, reads agent configuration directories, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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