Home / karanb192 / claude-code-mods · GitHub

mod-builder SKILL.md skillB

mod-builder from karanb192/claude-code-mods is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add karanb192/claude-code-mods/mod-builder@git:20261003.10617a9

Pins git:20261003.10617a9 in mdr.lock. Pin the fingerprint instead.

Audit grade
B, 16 of 17 checks passed
Kind
SKILL.md skill
Repository
karanb192/claude-code-mods
Path
plugins/mod-builder/skills/mod-builder/SKILL.md
Versions recorded
4
Latest version
git:20261003.10617a9, committed Oct 3, 2026
First version recorded
Sep 15, 2026
Size
19,487 bytes
Repository stars
44
License
MIT

Plans, writes, validates, proves, reviews, migrates and publishes Claude Code mods for keeping and shipping; the built-in plugin-authoring skill is for trying a mod live in this session. Every build ends with evidence files from an isolated load and a handoff that names what was and was not proven. Trigger phrases: build a mod, Claude mod, hooks module, function hook, mod idea, brainstorm mods, find a mod, review my mod, debug my mod, prove my mod, migrate my mod, publish my mod, /mod-builder.

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

# Mod builder

A mod is a Claude Code plugin whose `hooks/hooks.json` names one hooks module under `modules`. The module exports `register(on, options)`, and each hook is a function `($, e, next)`. It runs inside Claude Code's own process with the user's reach. Mods need Claude Code 2.1.287 or later, are on by default, and the old early-access flag is ignored. [src: docs overview > Turn mods on or off | checked 2.1.288 | recheck: gate prints a floor line that does not end "met"]

Three facts carry this skill:

1. `claude plugin validate <dir>` prints every hooked event, every `$` call, every env name and every state key before any code runs. [src: docs create > Check what Claude Code reads from your mod | checked 2.1.288 | recheck: footprint.mjs prints a note prefix it does not parse]
2. Every load from `--plugin-dir` or the dev-mods folder writes the exact declarations for the running build into `<mod>/.claude-plugin/types/`; line 1 of `claude-code/index.d.ts` names the build. Nothing has to be run to get them. [src: docs create > Get type definitions for your version | checked 2.1.288 | recheck: gate cannot locate types after a load]
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add karanb192/claude-code-mods/mod-builder@sha256:7f1583290e6ebbbf

The line at the top of this page pins the label git:20261003.10617a9, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_q57ajwdlh5oimvdr.svg)](https://markdownregistry.com/a/art_q57ajwdlh5oimvdr)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 4 versions of this file, between Sep 15, 2026 and Oct 3, 2026, about one every 6 days. Its first recorded version is graded A and its latest B.

versioncommittedcommitsizeaudit
git:20261003.10617a9 latest2026-10-03 10617a9 19,487 BB view · diff
git:20261002.9d73de72026-10-02 9d73de7 15,327 BA view · diff
git:20260915.f1126502026-09-15 f112650 13,205 BA view · diff
git:20260915.f8a50922026-09-15 f8a5092 10,737 BA view

Audit of the latest version

B  16 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (19487 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

Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.

Source

GitHub

karanb192/claude-code-mods · 44 stars · license MIT · pushed 2026-10-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_q57ajwdlh5oimvdr
GET https://markdownregistry.com/api/v1/resolve?ref=karanb192/claude-code-mods/mod-builder
GET https://markdownregistry.com/api/v1/blob/7f1583290e6ebbbfbbf28ff11f8655a734782213c39fb61d29da3bedce8ae315

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.

Browse by kind, by grade B, or by owner.