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/block/ai-rules/agents-mdgit clone --depth 1 https://github.com/block/ai-rulesWhat 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 | $0.00017 | $0.00017 |
| Opus 5 | $0.00009 | $0.00009 |
| Sonnet 5 | $0.00003 | $0.00003 |
| Haiku 4.5 | $0.00002 | $0.00002 |
Grade A, and why
ai-rules 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 yesterday.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- ai-rules CLAUDE.md — 100% identical, 0 lines differ
What it actually says
ai-rules/.generated-ai-rules/ai-rules-generated-AGENTS.md
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.
- yesterday First seen · 1 lines · 17 tokens per session scan A a1e66b52fcfe
ai-rules AGENTS.md is an instructions file published in the GitHub repository block/ai-rules (128 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 17 tokens to every session, about $0.0001 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
awesome-ai-rules copilot-instructions.md
Copilot instructions for shumatsumonobu/awesome-ai-rules, covering copilot instructions, code style, database and don't.
awesome-ai-rules react.instructions.md
Instructions for shumatsumonobu/awesome-ai-rules: This file activates ONLY when Copilot is working on .tsx files (controlled by the applyTo pattern above). The main copilot-instructions.md applies globally; this adds React-specific rules on top.
awesome-ai-rules testing.instructions.md
Instructions for shumatsumonobu/awesome-ai-rules: This file activates ONLY when Copilot is working on test files (controlled by the applyTo pattern above). Unlike Cursor's agent-requested mode, Copilot requires an explicit file pattern -- it won't pull this in based on task context alone.
agent-toolkit AGENTS.md
Instructions for sanity-io/agent-toolkit, covering sanity project, commands, mcp setup, schema & types and development.
claude-code-codex-bridge AGENTS.md
Instructions for vladolaru/claude-code-codex-bridge, covering agents.md, repository overview, architecture, repository structure and package layout.
kodus-ai AGENTS.md
AGENTS.md instructions for kodustech/kodus-ai, covering kodus ai, structure, stack, getting started and commands.