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/hydro13/tandem-browser/claude-mdgit clone --depth 1 https://github.com/hydro13/tandem-browserWrote 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/hydro13/tandem-browser/claude-md)<a href="https://agentmods.dev/instructions/hydro13/tandem-browser/claude-md"><img src="https://agentmods.dev/badge/instructions/hydro13/tandem-browser/claude-md.svg" alt="Measured on agentmods" 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 | $0.00139 | $0.00139 |
| Opus 5 | $0.00069 | $0.00069 |
| Sonnet 5 | $0.00028 | $0.00028 |
| Haiku 4.5 | $0.00014 | $0.00014 |
Grade A, and why
tandem-browser 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 4d 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
CLAUDE.md
Read AGENTS.md in full — it is the development guide for coding agents working on this repository: workflow, testing gates, git discipline, context discipline, and the anti-detection architecture rules that must never be violated.
Before changing code, also read ARCHITECTURE.md for the layer model and the manager system.
Quick facts:
- Verify gate (same as CI):
npm run verify - Managers: see
src/registry.ts(the source of truth, not doc counts) - All repository content is English; replies to Robin may be Dutch
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.
- 4d ago First seen · 16 lines · 139 tokens per session scan A fe77324d7aa4
tandem-browser CLAUDE.md is an instructions file published in the GitHub repository hydro13/tandem-browser (604 stars, last pushed today), licensed MIT. It adds 139 tokens to every session, about $0.0007 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
vscode ai-customization.instructions.md
Architecture documentation for VS Code AI Customization view. Use when working in src/vs/workbench/contrib/chat/browser/aiCustomization.
vscode agentHostTesting.instructions.md
Architecture documentation for VS Code AI Customization view. Use when working in src/vs/workbench/contrib/chat/browser/aiCustomization.
rustwright AGENTS.md
AGENTS.md instructions for Skyvern-AI/rustwright, covering repository instructions, public boundary, pull-request review, local verification and browser launches.
stashbase AGENTS.md
AGENTS.md instructions for liliu-z/stashbase, covering agent maintenance contract for this repo, github access for this repository, temporary worktrees, electron launch environment and documentation route.
chat-on-steroids CLAUDE.md
Claude Code instructions for totec448-spec/chat-on-steroids: Read and follow AGENTS.md before changing this repository.
cloakbrowser-mcp AGENTS.md
Instructions for swimmwatch/cloakbrowser-mcp, covering agents.md, about the project, golden rules, project layout and daily commands.