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catalyst: Instructions file for Claude Code

CLAUDE.md

catalyst CLAUDE.md is an instructions file for Claude Code from dwalleck/catalyst. It costs 3,396 tokens per session, scanned C, original, MIT.

Project instructions for Catalyst, a reference library of Claude Code skills, hooks, agents, and commands for TypeScript microservices. It is a collection to integrate into another project, not a standalone application.

In plain words
What is it for?
Choosing and adapting reusable development components, adding them to a user's project, checking compatibility, and explaining how the integrated components work.
Why use it?
They prevent an agent from modifying the library by mistake and require it to understand the target project's structure and technology before copying anything.

Instructions file for Claude Code

Written for Claude Code: $CLAUDE_PROJECT_DIR variable. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

This is dwalleck/catalyst's own configuration. It tells Claude Code how to work on catalyst itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything catalyst configures →

not rated 11repo 11mo ago C scan 3,396 tokens original MIT
View source ↗ dwalleck/catalyst
Reuse

Borrowing it

Nothing to install: this file belongs to dwalleck/catalyst. 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/dwalleck/catalyst/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/dwalleck/catalyst

Made for: Claude Code.

Wrote this? Show the measurements

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Per session 3,396 This file is loaded in full into every session.
When invoked 3,396 The same file — it is already loaded in full.
Security scan C 2 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.03396 $0.03396
Opus 5.5 $0.01358 $0.01358
Sonnet 5.5 $0.00679 $0.00679
Haiku 4.5 $0.00340 $0.00340

Measured 1mo ago against content hash fa09a888b28f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

catalyst CLAUDE.md scanned grade C with 2 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 1mo 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

cat .claude/settings.json | jq .

Enumerates other installed skillsmediumAgent snooping

Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.

ls -la .claude/skills/[skill-name]
CLAUDE.md · 489 lines

How it starts

The opening of the file, as written. The whole thing — 489 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What This Repository Is

A reference library of Claude Code infrastructure - NOT a working application.

This showcase contains production-tested skills, hooks, agents, and slash commands extracted from 6 months of real-world use managing TypeScript microservices. Users will ask you to help them integrate these components into their own projects.

Critical: When users ask to "add [component]", they mean copy it to THEIR project, not modify this showcase.

Your Role: Integration Assistant

Primary tasks:

  1. Help users integrate components from this showcase into their projects
  2. Customize configurations for their specific project structure
  3. Verify integrations work correctly
  4. Explain how components function

Before starting ANY integration:

  • Read CLAUDE_INTEGRATION_GUIDE.md - contains detailed integration instructions
  • Ask about user's project structure
  • Verify tech stack compatibility for skills
  • Never assume directory structures

Repository Architecture

.claude/
├── skills/                 # 5 production skills
│   ├── backend-dev-guidelines/     (Node.js/Express/Prisma)
│   ├── frontend-dev-guidelines/    (React/MUI v7/TanStack)
│   ├── skill-developer/            (Meta-skill, framework-agnostic)
│   ├── route-tester/               (JWT cookie auth testing)
│   ├── error-tracking/             (Sentry integration)
│   └── skill-rules.json            (Activation configuration)
├── hooks/                  # Rust-based hooks for automation
│   ├── RustHooks/                  (Rust implementation)
│   ├── skill-activation-prompt.sh  (ESSENTIAL - auto-activates skills)
│   ├── post-tool-use-tracker.sh    (ESSENTIAL - tracks file changes)
│   ├── tsc-check.sh                (Optional - monorepo TypeScript checks)
│   └── ... (other optional hooks)
├── agents/                 # 10 specialized agents (standalone)
│   ├── code-architecture-reviewer.md
│   ├── refactor-planner.md
│   ├── frontend-error-fixer.md
│   └── ... (7 more)
└── commands/               # 3 slash commands
    ├── dev-docs.md
    ├── dev-docs-update.md
    └── route-research-for-testing.md

dev/
└── README.md               # Dev docs pattern documentation

Read the full file on GitHub · 489 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.

  1. 1mo ago First seen · 489 lines · 3,396 tokens per session scan C fa09a888b28f

Subscribe to this mod's changes

catalyst CLAUDE.md is an instructions file published in the GitHub repository dwalleck/catalyst (11 stars, last pushed 11mo ago), licensed MIT. It adds 3,396 tokens to every session, about $0.0136 per session on Opus 5.5. A static security scan graded it C with 2 findings (reads agent configuration directories, enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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