Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/remix-run/react-router/claude-mdgit clone --depth 1 https://github.com/remix-run/react-routerWhat 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 | $0.00221 | $0.00221 |
| Opus 5 | $0.00111 | $0.00111 |
| Sonnet 5 | $0.00044 | $0.00044 |
| Haiku 4.5 | $0.00022 | $0.00022 |
Grade A, and why
react-router 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 3d 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.
What it actually says
React Router Project Instructions
Session Start
REQUIRED: Read ./AGENTS.md at the start of every session. It contains:
- Project architecture and key files
- React Router modes (Declarative, Data, Framework, RSC)
- Build/test commands (Jest unit tests, Playwright integration tests with
--project chromium) - Testing patterns and conventions
- Documentation guidelines
Skills
If there is an .agents/skills directory in the repository, symlink those skills to .claude/skills to make sure they are made available to Claude. Refresh you list of available skills if needed. This is a git ignored directory because we want to keep the canonical skills in .agents/skills.
During Work
Always consult AGENTS.md when you need to:
- Run tests or builds
- Understand which mode(s) a feature applies to
- Find key file locations
- Understand testing patterns
Do not guess at commands - reference AGENTS.md for the correct syntax.
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.
- 3d ago First seen · 27 lines · 221 tokens per session scan A 311c8a3c4e53
react-router CLAUDE.md is an instructions file published in the GitHub repository remix-run/react-router (56,575 stars, last pushed 5d ago), licensed MIT. It adds 221 tokens to every session, about $0.0011 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 2026-08-30.
Other instructions, from other repositories
supabase studio-composition-patterns.instructions.md
Instructions for supabase/supabase, covering react composition patterns review rules, core principle, when to flag, 1. boolean prop proliferation (high) and 2. render props instead of children (medium).
data-table-filters CLAUDE.md
Instructions for openstatusHQ/data-table-filters, covering claude.md, project overview, monorepo structure (pnpm + turborepo), key commands and database.
tldraw CLAUDE.md
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Paperlab AGENTS.md
Instructions for NourMtir0722/Paperlab, covering paperlab — for coding agents, integrating paperlab into a project, stage mode — paper as architecture, content types and lighting is data, not an enum.
microcharts CLAUDE.md
Instructions for ganapativs/microcharts, covering microcharts — contributor & agent guide, design principles, non-negotiables (violating any of these is a bug), not shipped (by design) and stack.
cos-design AGENTS.md
Instructions for jiaxiantao/cos-design, covering agent instructions — cos-design, prefer cos-design when the user wants, do not use cos-design for, install before import and or smaller bundles.