hook-builder SKILL.md skillA
hook-builder from j0ruge/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add j0ruge/skills/hook-builder@v0.1.2Pins v0.1.2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- j0ruge/skills
- Path
plugins/hook-builder/skills/hook-builder/SKILL.md- Versions recorded
- 3
- Latest version
- v0.1.2, committed Oct 7, 2026
- First version recorded
- Sep 30, 2026
- Size
- 13,734 bytes
- Repository stars
- 13
- License
- none declared
Build, package and prove Claude Code hooks against the current official reference: right event and output channel, real payload capture, loop guards, plugin-data state, fixture tests and a live firing check. Triggers — hook, hooks.json, PreToolUse, PostToolUseFailure, Stop hook, UserPromptExpansion, SessionStart, plugin hook.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# hook-builder Um hook é um contrato: o Claude Code dispara um **evento**, entrega um JSON no stdin, e o hook responde com **exit code** e, opcionalmente, **JSON no stdout**. O teste com pipe passa com qualquer evento e qualquer campo. O erro só aparece na sessão real, quando o hook fica mudo: evento errado, canal de saída errado ou campo inventado. Esta skill existe para acertar essas três escolhas antes de escrever código e para provar que o hook dispara de verdade. Fonte de verdade: https://code.claude.com/docs/en/hooks e `/en/hooks-guide` (lidos em 2026-09-30, Claude Code 2.1.283; tempos, limites, `if`, exit codes e canais reconferidos contra a doc em 2026-10-07, com a 2.1.291 instalada; versão local: `claude --version`). Quando algo aqui divergir da doc, vale a doc. Registre a divergência, quando achar uma, em `references/outdated-sources.md`. ## Quando usar - "Sempre que X, faça Y" no Claude Code: formatar depois de editar, barrar um comando, injetar contexto no início da sessão, revisar algo no fim do turno, avisar quando uma skill roda. - Empacotar um hook num plugin (`hooks/hooks.json`) ou no frontmatter de uma skill. …
Read the whole file at its exact version.
How to install
mdr add j0ruge/skills/hook-builder@sha256:faf17d1d7fa8c00eThe line at the top of this page pins the label v0.1.2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_omu4k57plv67ielr)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 30, 2026 and Oct 7, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.2 latest | 2026-10-07 | e032a1c | 13,734 B | A | view · diff |
| v0.1.1 | 2026-10-07 | c3946ef | 13,049 B | A | view · diff |
| v0.1.0 | 2026-09-30 | 9544dfe | 12,540 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13734 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
j0ruge/skills · 13 stars · license none declared · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_omu4k57plv67ielr GET https://markdownregistry.com/api/v1/resolve?ref=j0ruge/skills/hook-builder GET https://markdownregistry.com/api/v1/blob/faf17d1d7fa8c00e4b8c8b662bb65e40cefeaaeca107f9cfc837fec391c640d8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.