Borrowing it
Nothing to install: this file belongs to flipbit03/forestui. 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/flipbit03/forestui/main/CLAUDE.mdgit clone --depth 1 https://github.com/flipbit03/forestuiWrote 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/flipbit03/forestui/claude-md)<a href="https://agentmods.dev/instructions/flipbit03/forestui/claude-md"><img src="https://agentmods.dev/badge/instructions/flipbit03/forestui/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/flipbit03/forestui/claude-md"><img src="https://agentmods.dev/badge/instructions/flipbit03/forestui/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 | $0.09008 | $0.09008 |
| Opus 5.5 | $0.03603 | $0.03603 |
| Sonnet 5.5 | $0.01802 | $0.01802 |
| Haiku 4.5 | $0.00901 | $0.00901 |
Grade A, and why
forestui 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 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.
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 — 687 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md - AI Development Guidelines
This file provides context for AI assistants (like Claude) working on forestui.
Never touch the user's live tmux
This rule applies to every task in this repo, not just testing.
Whoever works on forestui is, almost by definition, running forestui. That
is what makes this different from an ordinary "be careful" note: a live tmux
server is up right now, holding their actual work — editors mid-edit,
terminals mid-command, Claude sessions mid-conversation, laid out the way they
left them. It is not a risk to weigh against convenience; it is the default
state of this repo's development environment, and a bare tmux command from a
shell attaches straight to it.
The session running this task is very likely one of those windows — forestui
opens Claude sessions in tmux windows, and this is a Claude session. A stray
rename-window, kill-window or kill-server can destroy the user's work,
up to and including the conversation that issued the command.
- Never run a bare
tmuxcommand — not to look, not to list, not "just once".tmux list-sessionsis as dangerous astmux kill-server, because it is the step that convinces you the next call is safe. - Drive tmux only through
tu, withTMUX_TMPDIRpointed at a throwaway directory. Thetest-forestuiskill has the exact invocation. - Exploring tmux behaviour is not an exception. Learning what a tmux
command does, probing options or hooks, reproducing something from the
docs — all of it goes on an isolated server under
tu. A separate-Lsocket looks like it solves this, and it does not: it relies on never once forgetting the flag, against a default that reaches the user's live session.
The test-forestui skill carries the full harness recipe, and its description
asks to be loaded before any tmux command, not only before testing — because
tasks that do not look like testing are exactly where this gets broken: a
spike, doc research, "just checking how tmux options work". The rule is
repeated here because this file is always loaded and a skill is not.
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 Changed · +59 lines · +967 tokens per session ecf4ae2cfa50
- 1mo ago First seen · 628 lines · 8,041 tokens per session scan A 88fa50304988
forestui CLAUDE.md is an instructions file published in the GitHub repository flipbit03/forestui (26 stars, last pushed 14d ago), licensed MIT. It adds 9,008 tokens to every session, about $0.0360 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.
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.