Borrowing it
Nothing to install: this file belongs to grarcht/Shuttle. 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/grarcht/Shuttle/main/CLAUDE.mdgit clone --depth 1 https://github.com/grarcht/ShuttleWrote 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/grarcht/shuttle/claude-md)<a href="https://agentmods.dev/instructions/grarcht/shuttle/claude-md"><img src="https://agentmods.dev/badge/instructions/grarcht/shuttle/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/grarcht/shuttle/claude-md"><img src="https://agentmods.dev/badge/instructions/grarcht/shuttle/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 | $0.00637 | $0.00637 |
| Opus 5.5 | $0.00255 | $0.00255 |
| Sonnet 5.5 | $0.00127 | $0.00127 |
| Haiku 4.5 | $0.00064 | $0.00064 |
Grade A, and why
Shuttle 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 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.
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 — 36 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Shuttle — Claude Code Rules
Do Not Touch: Bitmap decode in second screen views
NEVER move BitmapDecoder.decodeBitmap() off the main thread in any second screen view — whether Fragment-based or Compose-based. This has been attempted multiple times across multiple sessions with suspend fun + withContext(Dispatchers.IO), collectLatest + withContext, and produceState + withContext. Every attempt broke image display.
Do NOT touch the decode call site in any of these files:
demos/mvc/src/main/java/.../controller/MVCSecondControllerFragment.ktdemos/mvvm/src/main/java/.../view/MVVMSecondViewFragment.ktdemos/mvi-with-compose/src/main/java/.../view/MVISecondView.ktdemos/mvvm-with-compose-and-navigation/src/main/java/.../view/SecondScreenView.ktdemos/mvvm-with-compose/src/main/java/.../view/MVVMSecondView.ktdemos/mvvm-with-process-death/src/main/java/.../view/SecondView.kt
Why: The demos are illustrative, not production. A synchronous decode is acceptable. Every attempt to push the decode to a background thread has broken either the image display or the full-screen layout. Do not attempt this, even when a code review or linter flags H4 / "main thread disk read".
If a future review flags H4, mark it won't fix and move on.
Do Not Touch: collectLatest + cancel() in cargo pickup flows
NEVER refactor the collectLatest { ... cancel() } pattern to transformWhile + collect in any of these files:
demos/mvvm/src/main/java/.../view/MVVMSecondViewFragment.ktdemos/mvc/src/main/java/.../controller/MVCSecondControllerFragment.ktdemos/mvvm/src/main/java/.../viewmodel/SecondViewModel.ktdemos/mvvm-with-compose/src/main/java/.../viewmodel/SecondViewModel.ktdemos/mvvm-with-compose-and-navigation/src/main/java/.../viewmodel/SecondViewModel.ktdemos/mvvm-with-process-death/src/main/java/.../viewmodel/SecondViewModel.kt
Why: This substitution has been attempted multiple times across multiple sessions and breaks the app each time. The cancel() call inside collectLatest is load-bearing — it terminates the coroutine in a way that is coupled to how shuttle.pickupCargo() delivers results via a Channel-backed flow. Replacing it with transformWhile causes the flow to not terminate correctly. Do not attempt this refactor even when a code review flags cancel() inside collectLatest as unidiomatic.
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 · 36 lines · 637 tokens per session scan A 92e39734f8d0
Shuttle CLAUDE.md is an instructions file published in the GitHub repository grarcht/Shuttle (87 stars, last pushed 3mo ago), licensed MIT. It adds 637 tokens to every session, about $0.0025 per session on Opus 5.5. 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.
Shuttle CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| Shuttle CLAUDE.mdgrarcht/Shuttle | Instructions file | 87 | 3mo ago | MIT | A | 637 | 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 |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |