Borrowing it
Nothing to install: this file belongs to haomingkoo/japan-seasons-mcp. 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/haomingkoo/japan-seasons-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/haomingkoo/japan-seasons-mcpWrote 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/haomingkoo/japan-seasons-mcp/claude-md)<a href="https://agentmods.dev/instructions/haomingkoo/japan-seasons-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/haomingkoo/japan-seasons-mcp/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/haomingkoo/japan-seasons-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/haomingkoo/japan-seasons-mcp/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 | $0.01088 | $0.01088 |
| Opus 5 | $0.00544 | $0.00544 |
| Sonnet 5 | $0.00218 | $0.00218 |
| Haiku 4.5 | $0.00109 | $0.00109 |
Grade A, and why
japan-seasons-mcp 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 11d 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 — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Guidance for Claude Code when working in this repository.
Project
japan-seasons-mcp — an MCP (Model Context Protocol) server that gives AI assistants live Japan seasonal-travel data: cherry blossom (sakura) and autumn leaves (koyo) forecasts, flowers, festivals, fruit picking, and weather, sourced from the Japan Meteorological Corporation (JMC). Also serves a public website (seasons.kooexperience.com) with maps and a hosted remote MCP endpoint at /mcp.
Tech Stack
- TypeScript (Node >=18), compiled with
tsctodist/ @modelcontextprotocol/sdkfor MCP server/tools,zodfor schemasexpress(declared dep, but the HTTP server itself is built on Node's rawhttp.createServer, seesrc/index.ts)- Vitest for tests
- Vanilla JS/HTML/CSS frontend in
public/ - Deployed on Railway via Docker (
Dockerfile,railway.json)
Commands
npm run dev— runsrc/index.tsdirectly withnode --watch(stdio MCP mode)npm run build—tsccompile todist/, chmod the entrypoint, then runscripts/check-site-copy.mjsnpm start— run compiled server (dist/index.js), stdio MCP modenpm run start:http— run compiled server in HTTP mode (--httpflag; also auto-enabled ifPORTenv var is set)npm test— run Vitest test suite (currently justsrc/lib/dates.test.ts)npm version— syncs version intoserver.jsonviascripts/sync-version.mjs, then stages it
No lint script exists in package.json.
Architecture
src/index.ts— entrypoint. Registers all MCP tools/prompts (registerAllTools), and runs either stdio transport or a raw Node HTTP server (--http/PORTenv) that serves: the streamable-HTTP MCP endpoint at/mcp, REST endpoints under/api/*(delegated tosrc/api.ts), a dynamic/sitemap.xml, and static frontend files frompublic/(pre-read into memory at startup).src/api.ts— REST API handlers for the frontend (/api/sakura/forecast,/api/sakura/spots,/api/sakura/best,/api/sakura/all-spots,/api/kawazu,/api/koyo/forecast,/api/koyo/spots,/api/koyo/all-spots,/api/fruit/farms,/api/flowers,/api/festivals,/api/weather). Includes an in-memory + durable "all-spots" cache keyed off the daily 9 AM JST JMC publish time.src/lib/sakura-forecast.ts,src/lib/koyo.ts— fetch/parse live JMC sakura and koyo (autumn leaves) forecast + spot data.src/lib/weather.ts,src/lib/areas.ts,src/lib/constants.ts,src/lib/dates.ts,src/lib/romaji.ts— supporting data/utilities (weather lookups, city/area tables, fruit/festival/flower constants, JST date helpers, romaji formatting).src/lib/cache.ts/src/lib/durable-cache.ts— in-memory TTL cache and an optional durable (persisted) cache layer.src/lib/site-config.ts— shared site URLs/copy used by both the MCP server text and the HTML templates.public/— static site: landing page,cherry-blossom-forecast.html,autumn-leaves-forecast.html,japan-seasonal-travel-mcp.html, plus static JSON data (flowers.json,festivals.json,fruit-farms.json).
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.
- 11d ago First seen · 51 lines · 1,088 tokens per session scan A 37aff85c5d88
japan-seasons-mcp CLAUDE.md is an instructions file published in the GitHub repository haomingkoo/japan-seasons-mcp (1 stars, last pushed 14d ago), licensed MIT. It adds 1,088 tokens to every session, about $0.0054 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.
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