ai-fastify-template: Instructions file for Claude Code

CLAUDE.md

ai-fastify-template CLAUDE.md is an instructions file for Claude Code from mkwatson/ai-fastify-template. It costs 873 tokens per session, scanned A, original, MIT.

A guide for working on an AI-focused Fastify template, where Fastify is a framework for building web servers with JavaScript or TypeScript. It lists quick checks, continuous-integration checks, and Nx commands for testing only changed packages; Nx is a tool for managing multi-package repositories.

In plain words
What is it for?
Use it when developing or validating the template, especially when working in a repository with multiple packages and needing targeted or full checks.
Why use it?
It makes the development and pre-push checks clear, including how to reproduce the checks used by automated builds.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions Claude Code; mentions AGENTS.md.

This is mkwatson/ai-fastify-template's own configuration. It tells Claude Code how to work on ai-fastify-template 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 ai-fastify-template configures →

Reuse

Borrowing it

Nothing to install: this file belongs to mkwatson/ai-fastify-template. 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/mkwatson/ai-fastify-template/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/mkwatson/ai-fastify-template

Made for: Claude Code.

Wrote this? Show the measurements

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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.

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Per session 873 This file is loaded in full into every session.
When invoked 873 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00873 $0.00873
Opus 5.5 $0.00349 $0.00349
Sonnet 5.5 $0.00175 $0.00175
Haiku 4.5 $0.00087 $0.00087

Measured 2mo ago against content hash 53a909f08324, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ai-fastify-template 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 · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project Memory – AI Fastify Template

Master Guidelines

@AGENTS.md

Claude Code Specific Notes

Things shared across all AI coding agents are in AGENTS.md above.

Claude-specific guidelines can be added here if needed in the future. For now, all guidelines are maintained in the master AGENTS.md file to ensure consistency across all AI coding tools.

Quick Reference Commands

# Development workflow
pnpm ai:quick          # Fast validation during coding (Nx cached)
pnpm ai:check          # Pre-commit validation
pnpm ai:compliance     # Full quality pipeline

# CI Validation (CRITICAL: Run before pushing)
pnpm ci:check          # Same validation as GitHub Actions (lint + type-check + test)
pnpm ci:simulate       # EXACT CI simulation: builds first, then runs ci:check (use when CI fails but local passes)

# Nx affected commands - only run on changed packages
pnpm affected:lint     # Lint only changed packages
pnpm affected:test     # Test only changed packages
pnpm affected:all      # All validation on changed packages

# Test configuration validation (CRITICAL for dual configs)
pnpm test:config:verify    # Full config validation + test execution comparison
pnpm test:config:quick     # Quick config validation for pre-push hooks

# Project management
# Use Linear MCP tools for issue management
# Use gh CLI for GitHub operations

# Quality tools
pnpm lint:fix          # Auto-fix formatting
pnpm test              # Run tests
pnpm build             # Production build

# Environment check
pnpm doctor            # Check Node/pnpm versions

🚨 Critical Workflow: Prevent CI Failures

ALWAYS run local validation before pushing:

# 1. Before every commit/push
pnpm ci:check          # Matches GitHub Actions exactly

# 2. If you see errors, fix them locally
pnpm lint:fix          # Auto-fix linting issues
pnpm type-check        # Verify TypeScript

# 3. Then commit and push
git add . && git commit -m "your message"
git push

Key Rule: Never push code that fails pnpm ci:check - it will fail in CI and waste time.

Read the full file on GitHub · 111 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. 2mo ago First seen · 111 lines · 873 tokens per session scan A 53a909f08324

Subscribe to this mod's changes

ai-fastify-template CLAUDE.md is an instructions file published in the GitHub repository mkwatson/ai-fastify-template (17 stars, last pushed 1y ago), licensed MIT. It adds 873 tokens to every session, about $0.0035 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 2026-08-30.

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