What is abossenbroek-claude-plugins CLAUDE.md?

A set of project instructions for developing and verifying Claude Code plugins in a specific repository. It requires Claude Code's plugin validator and pre-commit checks before changes are considered ready.

Use it while editing the repository's plugins, especially the red-agent and context-engineering plugins. It guides setup, validation, pre-commit checks, staging, and feature-branch work.

It prevents invalid plugin files, formatting problems, JSON errors, and dependency-integrity issues from reaching the repository. It also makes the required branch and verification steps explicit.

How abossenbroek/abossenbroek-claude-plugins configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to abossenbroek/abossenbroek-claude-plugins. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/abossenbroek/abossenbroek-claude-plugins/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/abossenbroek/abossenbroek-claude-plugins

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/abossenbroek/abossenbroek-claude-plugins/claude-md/github.svg)](https://agentmods.dev/instructions/abossenbroek/abossenbroek-claude-plugins/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/abossenbroek/abossenbroek-claude-plugins/claude-md"><img src="https://agentmods.dev/badge/instructions/abossenbroek/abossenbroek-claude-plugins/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/abossenbroek/abossenbroek-claude-plugins/claude-md"><img src="https://agentmods.dev/badge/instructions/abossenbroek/abossenbroek-claude-plugins/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,237 This file is loaded in full into every session.

When invoked 2,237 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.02237	$0.02237
Opus 5.5	$0.00895	$0.00895
Sonnet 5.5	$0.00447	$0.00447
Haiku 4.5	$0.00224	$0.00224

Measured 2mo ago against content hash f32d807f65d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

abossenbroek-claude-plugins CLAUDE.md scanned grade A with 0 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 2mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 315 lines

How it starts

The opening of the file, as written. The whole thing — 315 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Code Plugins Repository

A collection of Claude Code plugins. Schema validation is delegated to Claude Code itself via claude plugin validate — there is no in-repo validation infrastructure.

Plugins: See red-agent/CLAUDE.md and context-engineering/CLAUDE.md for plugin-specific documentation.

Critical Rules

1. Validate Plugins Before Commit

claude plugin validate ./red-agent
claude plugin validate ./context-engineering
claude plugin validate .

Why: Claude Code's runtime validator is the authoritative check. Run it before pushing to avoid CI noise.

2. Run Pre-commit Before Suggesting Completion

uv run pre-commit run --all-files

Why: Pre-commit catches ruff violations, JSON errors, and npm integrity issues.

3. Never Commit Without Verification

Before any commit:

Run claude plugin validate on the modified plugin
Run pre-commit (fixes auto-fixable issues)
Stage only intended files

Development Workflow

Setup

# Install dependencies (creates .venv automatically)
uv sync --all-extras

# Verify setup
uv run pre-commit run --all-files

Git Workflow

This repo uses feature branches. Main branch is protected.

# Create feature branch
git checkout -b feature/description

# Make changes, run validation, then commit
git add <files>
git commit -m "feat(plugin): description"

# Push and create PR
git push -u origin feature/description
gh pr create --title "Title" --body "Description"

# Wait for CI to pass
gh pr checks --watch

After Creating/Updating PR - ALWAYS Verify CI:

gh pr checks --watch       # Watch CI in real-time
gh pr checks               # Check status
gh pr checks --web         # Open Actions page in browser

CRITICAL: Never consider a PR "complete" until CI passes.

Conventional Commit Types:

feat(plugin): New features, new agents, architectural improvements
fix(plugin): Bug fixes
refactor(plugin): Code restructuring without behavior change
docs(plugin): README/changelog updates only
chore(plugin): Dependency updates, config changes

Read the full file on GitHub · 315 lines

Changes

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.

2mo ago First seen · 315 lines · 2,237 tokens per session scan A f32d807f65d2

Subscribe to this mod's changes

abossenbroek-claude-plugins CLAUDE.md is an instructions file published in the GitHub repository abossenbroek/abossenbroek-claude-plugins (2 stars, last pushed 6mo ago), licensed BSD-3-Clause. It adds 2,237 tokens to every session, about $0.0089 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

abossenbroek-claude-plugins CLAUDE.md next to 6 instructions from other repositories
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abossenbroek-claude-plugins: Instructions file for Claude Code