Borrowing it
Nothing to install: this file belongs to spboyer/sensei. 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/spboyer/sensei/main/AGENTS.mdgit clone --depth 1 https://github.com/spboyer/senseiWrote 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/spboyer/sensei/agents-md)<a href="https://agentmods.dev/instructions/spboyer/sensei/agents-md"><img src="https://agentmods.dev/badge/instructions/spboyer/sensei/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/spboyer/sensei/agents-md"><img src="https://agentmods.dev/badge/instructions/spboyer/sensei/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 | $0.01840 | $0.01840 |
| Opus 5.5 | $0.00736 | $0.00736 |
| Sonnet 5.5 | $0.00368 | $0.00368 |
| Haiku 4.5 | $0.00184 | $0.00184 |
Grade A, and why
sensei 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 6d 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 — 225 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Instructions for AI coding agents working with this repository.
Overview
This is Sensei, a skill for improving SKILL.md frontmatter compliance. It follows the Agent Skills specification (maintained by Anthropic).
Repository Structure
sensei/
├── SKILL.md # Core skill (DO NOT add README-style content here)
├── README.md # Human documentation
├── AGENTS.md # This file - agent instructions
├── LICENSE.txt # MIT license
├── package.json # Root package for npm run tokens
├── .token-limits.json # Custom token limits configuration
├── references/ # Progressive disclosure docs (loaded on-demand)
│ ├── scoring.md # Scoring algorithm details
│ ├── mcp-integration.md # MCP tool integration patterns
│ ├── loop.md # Ralph loop workflow
│ ├── examples.md # Before/after transformations
│ ├── configuration.md # Project config patterns
│ └── test-templates/ # Framework-specific test templates
│ ├── jest.md # Jest test template
│ ├── pytest.md # pytest test template
│ ├── waza.md # Waza trigger test format
│ └── ...
└── scripts/ # TypeScript token management tools
├── package.json # Dependencies (tsx, vitest, typescript)
├── tsconfig.json
├── vitest.config.ts
└── src/
├── tokens/
│ ├── cli.ts # CLI entry point
│ └── commands/
│ ├── types.ts # Interfaces, constants, utilities
│ ├── utils.ts # Config loading, file discovery
│ ├── count.ts # Token counting
│ ├── check.ts # Limit validation
│ ├── suggest.ts # Optimization suggestions
│ ├── compare.ts # Git-based comparison
│ └── score.ts # Advisory scoring
└── gepa/
├── auto_evaluator.py # GEPA auto-evaluator CLI
└── requirements.txt # Python dependencies (gepa)
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.
- 6d ago Changed · +2 lines · +11 tokens per session 35880c1a2a16
- 7d ago Changed · +8 lines · +122 tokens per session 6f5f840158c5
- 2mo ago First seen · 215 lines · 1,707 tokens per session scan A 9f64a19a2b72
sensei AGENTS.md is an instructions file published in the GitHub repository spboyer/sensei (60 stars, last pushed yesterday), licensed MIT. It adds 1,840 tokens to every session, about $0.0074 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.
sensei AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| sensei AGENTS.mdspboyer/sensei | Instructions file | 60 | yesterday | MIT | A | 1,840 | 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 |