Borrowing it
Nothing to install: this file belongs to loopdive/js2. 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/loopdive/js2/main/AGENTS.mdgit clone --depth 1 https://github.com/loopdive/js2Wrote 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/loopdive/js2/agents-md)<a href="https://agentmods.dev/instructions/loopdive/js2/agents-md"><img src="https://agentmods.dev/badge/instructions/loopdive/js2/agents-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/loopdive/js2/agents-md"><img src="https://agentmods.dev/badge/instructions/loopdive/js2/agents-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 | $0.00754 | $0.00754 |
| Opus 5.5 | $0.00302 | $0.00302 |
| Sonnet 5.5 | $0.00151 | $0.00151 |
| Haiku 4.5 | $0.00075 | $0.00075 |
Grade A, and why
js2 AGENTS.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 24d 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 — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Instructions
Claude Memories
- Before substantial work, review the markdown memories under .claude/memory.
- Start with MEMORY.md, then read any task-relevant files in the same directory.
- Treat those memory files as repo-specific operating context, especially around test262 workflow, agent coordination, cleanup rules, and user preferences.
IR-only development policy
- Development of the old direct-AST compilation path is frozen. Follow the development-freeze policy.
- Put new language features and semantic fixes in IR or the genuinely shared runtime. Preserve the old path/CI and historical measurements, existing source ownership and holds; shared infrastructure and measurement work remain permitted.
- An IR flag or IR_FIRST label is not proof of complete IR admission. Keep explicitly selected IR Test262 numbers separate from default/historical results.
Commit Messages
- Use Claude Code-style commit messages.
- Write a specific subject line that states the main change clearly.
- Add a body when the change is non-trivial.
- In the body, explain what changed and why it changed.
- Call out behavior changes, important tradeoffs, or follow-up work when relevant.
Preferred shape:
<type>(<scope>): <concise summary>
Explain the main implementation change and the reason for it.
Note behavior changes, risks, or follow-ups if they matter.
Examples of acceptable types: fix, feat, refactor, docs, test, chore.
Commit Attribution
- Commits produced by an AI agent must be authored by the user:
Thomas Tränkler <[email protected]>. - Add a co-author trailer identifying the agent that actually produced the commit:
# Codex session
Co-authored-by: Codex <[email protected]>
# Claude session
Co-authored-by: Claude <[email protected]>
- Never attribute Codex work to Claude or Claude work to Codex.
- Also add a
Model:trailer naming the exact model that produced the commit — vendor, family, version/subtype, and the configured reasoning effort (project-lead order, 2026-08-29; enforced by.husky/commit-msgfor any commit carrying an agent co-author trailer):
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.
- 24d ago Changed · +10 lines · +112 tokens per session e57b977989ec
- 2mo ago Changed · -50 tokens per session 98207a0287a0
- 2mo ago First seen · 69 lines · 692 tokens per session scan A 6322e5bb5cf2
js2 AGENTS.md is an instructions file published in the GitHub repository loopdive/js2 (67 stars, last pushed today), licensed Apache-2.0. It adds 754 tokens to every session, about $0.0030 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.
js2 AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| js2 AGENTS.mdloopdive/js2 | Instructions file | 67 | today | Apache-2.0 | A | 754 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | 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 | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |