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/jstxn/bebop/agents-mdgit clone --depth 1 https://github.com/jstxn/bebopWrote 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/jstxn/bebop/agents-md)<a href="https://agentmods.dev/instructions/jstxn/bebop/agents-md"><img src="https://agentmods.dev/badge/instructions/jstxn/bebop/agents-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 | $0.00977 | $0.00977 |
| Opus 5 | $0.00489 | $0.00489 |
| Sonnet 5 | $0.00195 | $0.00195 |
| Haiku 4.5 | $0.00098 | $0.00098 |
Grade B, and why
bebop AGENTS.md scanned grade B with 1 finding 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 3d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- If constraints aren't appearing, check that the bebop hook is configured (Claude Code: `~/.claude/settings.json`, Cursor: hooks config) How it starts
The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Instructions: Bebop
This project uses Bebop to automatically inject coding constraints into your prompts. When you receive a prompt, you'll see an "Active constraints" block appended—these are curated rules selected based on the project's context (language, framework, service type).
You don't need to do anything special. Just follow the constraints as you would any other instruction. They're there to ensure consistent, high-quality output aligned with the project's standards.
Understanding Your Constraints
Constraints appear in your prompt like this:
Active constraints:
- [NO_SECRETS] Never add secrets to code, commits, or logs. Use environment variables. (core/security)
- [WRITE_TEST_COVERAGE] Write tests for new functionality with >80% coverage. (core/code-quality)
Format breakdown:
[CONSTRAINT_ID]- Unique identifier for the rule- Description - What you should do
(pack-name/category)- Where the rule comes from
Context line: You may also see Context: backend, typescript, nestjs which shows what bebop detected about the current project/file. This determines which constraint packs are active.
Constraints are selected automatically based on:
- File path (e.g.,
src/api/triggers backend rules) - Detected frameworks and languages
- Project structure (monorepo vs single-service)
- Custom pack configuration in
.bebop/
Useful Commands
Help users understand and manage their constraints with these commands:
Check usage stats:
bebop stats
Shows prompt count, token savings, and constraint reduction metrics.
Preview compiled prompt:
bebop compile "your prompt here"
See exactly what constraints will be injected for a given prompt.
List available packs:
bebop packs
Shows all constraint packs (core + custom) and their status.
Directive syntax - Users can add these to prompts for manual control:
&use security- Explicitly include a pack&skip code-quality- Exclude a pack for this prompt&pack ./path/to/custom.md- Use a specific pack file
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.
- 3d ago First seen · 116 lines · 977 tokens per session scan B 1657a193a861
bebop AGENTS.md is an instructions file published in the GitHub repository jstxn/bebop (2 stars, last pushed 7mo ago), licensed MIT. It adds 977 tokens to every session, about $0.0049 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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 oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.