Borrowing it
Nothing to install: this file belongs to mgratzer/bloomery. 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/mgratzer/bloomery/main/AGENTS.mdgit clone --depth 1 https://github.com/mgratzer/bloomeryWrote 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/mgratzer/bloomery/agents-md)<a href="https://agentmods.dev/instructions/mgratzer/bloomery/agents-md"><img src="https://agentmods.dev/badge/instructions/mgratzer/bloomery/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/mgratzer/bloomery/agents-md"><img src="https://agentmods.dev/badge/instructions/mgratzer/bloomery/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 | $0.00922 | $0.00922 |
| Opus 5.5 | $0.00369 | $0.00369 |
| Sonnet 5.5 | $0.00184 | $0.00184 |
| Haiku 4.5 | $0.00092 | $0.00092 |
Grade A, and why
bloomery 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 1mo 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 — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Bloomery Skill
An agent skill that teaches engineers how to build a coding agent from scratch using raw HTTP calls.
Project Structure
skills/bloomery/
├── SKILL.md # Core skill logic (philosophy, rules, step dispatch)
├── scaffold.sh # Project scaffolding (copies templates, substitutes placeholders)
├── detect.sh # Progress detection (which step the user is on)
├── progress-update.sh # Progress file updates
├── templates/ # Standalone scaffold templates per language
│ ├── typescript/ # agent.ts, .gitignore, AGENTS.md
│ ├── python/ # agent.py, .gitignore, AGENTS.md
│ ├── go/ # main.go, go.mod, .gitignore, AGENTS.md
│ └── ruby/ # agent.rb, .gitignore, AGENTS.md
├── references/
│ ├── curriculum.md # 8-step curriculum (provider-agnostic)
│ ├── providers/
│ │ ├── gemini.md # Gemini API wire format, auth, examples
│ │ ├── openai.md # OpenAI (+ compatible) wire format, auth, examples
│ │ └── anthropic.md # Anthropic wire format, auth, examples
│ └── languages/
│ ├── typescript.md # TS runtime, stdlib, starter code
│ ├── python.md # Python runtime, stdlib, starter code
│ ├── go.md # Go runtime, stdlib, starter code
│ └── ruby.md # Ruby runtime, stdlib, starter code
├── tests/ # BATS test suite (scaffold, detect, progress-update)
│ ├── helpers/common.bash # Shared setup/teardown and fixture helpers
│ ├── scaffold.bats # 25 tests for scaffold.sh
│ ├── detect.bats # 35 tests for detect.sh
│ └── progress-update.bats # 13 tests for progress-update.sh
AGENTS.md # Agent instructions for contributing
README.md # User-facing docs, install instructions
LICENSE # MIT
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.
- 1mo ago First seen · 70 lines · 922 tokens per session scan A 3fe7a7bd5d66
bloomery AGENTS.md is an instructions file published in the GitHub repository mgratzer/bloomery (30 stars, last pushed 8mo ago), licensed MIT. It adds 922 tokens to every session, about $0.0037 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.
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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 copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.