What is blog CLAUDE.md?

Project instructions for a blog built with Vite, TanStack Start, and pnpm, including development, building, deployment, image handling, and text checks.

Use them when developing the blog, checking Japanese writing, optimizing images, building for deployment, or handling cached link-preview data.

They give the coding agent the repository's commands and rules so changes can be tested and built in the expected way.

How jaxx2104/blog configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to jaxx2104/blog. 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/jaxx2104/blog/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/jaxx2104/blog

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/jaxx2104/blog/claude-md/github.svg)](https://agentmods.dev/instructions/jaxx2104/blog/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/jaxx2104/blog/claude-md"><img src="https://agentmods.dev/badge/instructions/jaxx2104/blog/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/jaxx2104/blog/claude-md"><img src="https://agentmods.dev/badge/instructions/jaxx2104/blog/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,951 This file is loaded in full into every session.

When invoked 1,951 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.

Model	Per session	Once invoked
Fable 5.1	$0.01951	$0.01951
Opus 5.5	$0.00780	$0.00780
Sonnet 5.5	$0.00390	$0.00390
Haiku 4.5	$0.00195	$0.00195

Measured 2mo ago against content hash 1136a66fa61d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

blog 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 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

`rm -rf <output-dir> && pnpm test` before pushing.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

`curl -s localhost:PORT/ | grep -ao 'style-[^"]*\.css'` has to match

CLAUDE.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 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.

Commands

Development

pnpm dev         # Start Vite dev server (TanStack Start)
pnpm build       # Run velite build + vite build (prerender to dist/client/)
pnpm start       # Serve dist/ via vite preview
pnpm deploy      # Alias for pnpm build
pnpm optimize:images  # Re-encode content/posts images (pass --dry-run first)

pnpm build reaches the network to fill data/ogp-cache.json for any link card URL it has not seen, and to re-check entries older than 90 days. Set OGP_OFFLINE=1 to render fallback cards instead, or OGP_OFFLINE=strict to fail the build on a cache miss. CI builds with strict, so a post that adds a link needs the cache entry your local build produced to be committed with it. A URL that will never resolve goes in data/ogp-unfetchable.json instead.

Code Quality

pnpm lint                # Run Biome with --write
pnpm lint:ci             # Run Biome ci (no fixes; fails on warnings/errors)
pnpm lint:text           # Check Japanese text in blog posts (textlint)
pnpm lint:textfix        # Auto-fix Japanese text issues
pnpm test                # Run unit tests (vitest run)
pnpm test:types          # Run TypeScript type checking (tsc -p)
pnpm format              # Format code with Biome

Stack

A statically prerendered blog: TanStack Start (Vite + React) over a Velite + Zod content layer, CSS Modules, Biome, Vitest, pnpm, deployed to Cloudflare Pages. package.json is the source of truth for versions; what is worth knowing beyond it:

Vite 8 bundles with rolldown, not rollup. Chunking behaves differently — see the pitfalls below before touching chunk configuration
CSS ships as one asset (build.cssCodeSplit: false). Code-split CSS drops the previous route's stylesheet during SPA navigation, leaving the navi and footer unstyled until a hard reload
Velite writes two things: .velite/ for the build to read, and public/content/ for the client to fetch. Syntax highlighting (shiki + rehype-pretty-code) happens there, so it never reaches the browser
Specs live next to their source as *.test.ts / *.test.tsx

Read the full file on GitHub · 140 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 · 140 lines · 1,951 tokens per session scan C 1136a66fa61d

Subscribe to this mod's changes

blog CLAUDE.md is an instructions file published in the GitHub repository jaxx2104/blog (5 stars, last pushed 6d ago), licensed MIT. It adds 1,951 tokens to every session, about $0.0078 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

blog CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
blog CLAUDE.mdjaxx2104/blog	Instructions file	5	6d ago	MIT	C	1,951	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	275k	3d ago	MIT	A	4,313	Codex, OpenCode

blog: Instructions file for Claude Code