Borrowing it
Nothing to install: this file belongs to rtk-ai/grit. 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/rtk-ai/grit/master/CLAUDE.mdgit clone --depth 1 https://github.com/rtk-ai/gritWrote 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/rtk-ai/grit/claude-md)<a href="https://agentmods.dev/instructions/rtk-ai/grit/claude-md"><img src="https://agentmods.dev/badge/instructions/rtk-ai/grit/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/rtk-ai/grit/claude-md"><img src="https://agentmods.dev/badge/instructions/rtk-ai/grit/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 | $0.01479 | $0.01479 |
| Opus 5.5 | $0.00592 | $0.00592 |
| Sonnet 5.5 | $0.00296 | $0.00296 |
| Haiku 4.5 | $0.00148 | $0.00148 |
Grade C, and why
grit 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 1mo 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- rtk-instructions v2 --> Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
rtk curl <url> # Compact HTTP responses (70%) Copies of this mod
5 near-identical copies found in the catalogue:
- it-department-skills CLAUDE.md — 91% identical, 39 lines differ
- intervals.icu_to_claude_mcp_connection CLAUDE.md — 91% identical, 39 lines differ
- palace-rs CLAUDE.md — 91% identical, 29 lines differ
- ai.tech-lead-stack CLAUDE.md — 89% identical, 85 lines differ
- guardrails CLAUDE.md — 84% identical, 28 lines differ
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Persistent memory (ICM)
This project uses ICM for persistent memory across sessions.
Recall (before starting work)
icm recall "topic keywords" # search memories
icm recall-context "query" --limit 5 # formatted for prompt injection
Store (after completing significant work)
icm store -t "topic" -c "summary" -i medium # importance: critical|high|medium|low
icm store -t "decisions" -c "chose X over Y because..." -i high
icm store -t "errors-resolved" -c "fix: ..." -k "error,fix"
Other commands
icm update <id> -c "updated content" # edit memory in-place
icm health # topic hygiene audit
icm topics # list all topics
icm feedback record -t "topic" -c "context" -p "predicted" --corrected "actual"
RTK (Rust Token Killer) - Token-Optimized Commands
Golden Rule
Always prefix commands with rtk. If RTK has a dedicated filter, it uses it. If not, it passes through unchanged. This means RTK is always safe to use.
Important: Even in command chains with &&, use rtk:
# ❌ Wrong
git add . && git commit -m "msg" && git push
# ✅ Correct
rtk git add . && rtk git commit -m "msg" && rtk git push
RTK Commands by Workflow
Build & Compile (80-90% savings)
rtk cargo build # Cargo build output
rtk cargo check # Cargo check output
rtk cargo clippy # Clippy warnings grouped by file (80%)
rtk tsc # TypeScript errors grouped by file/code (83%)
rtk lint # ESLint/Biome violations grouped (84%)
rtk prettier --check # Files needing format only (70%)
rtk next build # Next.js build with route metrics (87%)
Test (90-99% savings)
rtk cargo test # Cargo test failures only (90%)
rtk vitest run # Vitest failures only (99.5%)
rtk playwright test # Playwright failures only (94%)
rtk test <cmd> # Generic test wrapper - failures only
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.
- 1mo ago First seen · 160 lines · 1,479 tokens per session scan C e513f2f7b075
grit CLAUDE.md is an instructions file published in the GitHub repository rtk-ai/grit (122 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 1,479 tokens to every session, about $0.0059 per session on Opus 5.5. A static security scan graded it C with 2 findings (hidden instructions, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
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).
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.