Borrowing it
Nothing to install: this file belongs to tokuhirom/blog4. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/tokuhirom/blog4/main/CLAUDE.mdgit clone --depth 1 https://github.com/tokuhirom/blog4Wrote 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.
[](https://agentmods.dev/instructions/tokuhirom/blog4/claude-md)<a href="https://agentmods.dev/instructions/tokuhirom/blog4/claude-md"><img src="https://agentmods.dev/badge/instructions/tokuhirom/blog4/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.
<a href="https://agentmods.dev/instructions/tokuhirom/blog4/claude-md"><img src="https://agentmods.dev/badge/instructions/tokuhirom/blog4/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01810 | $0.01810 |
| Opus 5 | $0.00905 | $0.00905 |
| Sonnet 5 | $0.00362 | $0.00362 |
| Haiku 4.5 | $0.00181 | $0.00181 |
Grade A, and why
blog4 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 220 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.
Important Git Workflow Instructions
CRITICAL: Always follow these git workflow rules:
- Create a new branch for EVERY commit - Never commit directly to main
- Create a PR after EVERY commit - Each commit should have its own PR
- Do NOT enable auto-merge - Manually review and merge PRs
- Branch naming convention - Use descriptive names like
fix/bug-descriptionorfeat/feature-name
Example workflow:
# 1. Create new branch
git checkout -b fix/some-bug
# 2. Make changes and commit
git add .
git commit -m "fix: description"
# 3. Push branch
git push -u origin fix/some-bug
# 4. Create PR
gh pr create --title "fix: description" --body "..."
# 5. Manually review and merge PR
Project Overview
Blog4 is a full-stack blog application with a Preact-based admin interface, built with a Go backend and HTML templates. It features wiki-style linking, Amazon product integration, automated image generation, and PWA support with Web Share Target API for sharing content from Android devices.
Development Setup
The project uses Docker Compose for local development:
# Start all services
docker-compose up
# Services and ports:
# - Backend API: http://localhost:8181
# - MariaDB: localhost:3306
# - LocalStack (S3): http://localhost:4566
LocalStack S3 Storage
The project uses LocalStack for S3-compatible storage in local development:
- Endpoint: http://localhost:4566
- Buckets:
blog4-attachments(public) - for uploaded images and filesblog4-backup(private) - for database backups
- Credentials:
test/test(LocalStack defaults)
# List buckets
aws --endpoint-url=http://localhost:4566 s3 ls
# List files in attachments bucket
aws --endpoint-url=http://localhost:4566 s3 ls s3://blog4-attachments
# Download a file
aws --endpoint-url=http://localhost:4566 s3 cp s3://blog4-attachments/attachments/2024/01/01/file.jpg ./
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.
- 8d ago First seen · 220 lines · 1,810 tokens per session scan A 88f0e84e1600
blog4 CLAUDE.md is an instructions file published in the GitHub repository tokuhirom/blog4 (5 stars, last pushed today), licensed MIT. It adds 1,810 tokens to every session, about $0.0090 per session on Opus 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.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.