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fabro: Instructions file for Codex

AGENTS.md

fabro AGENTS.md is an instructions file for Codex, OpenCode from fabro-sh/fabro. It costs 7,248 tokens per session, scanned A, original, MIT.

Repository instructions describing how to build, test, format, and check a Rust and TypeScript project with Docker-related setup notes.

In plain words
What is it for?
It covers workspace builds, unit and end-to-end tests, formatting, linting, environment variables, and selected package tests for the fabro project.
Why use it?
It gives the coding agent the project-specific commands and requirements needed to work on and verify the code.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is fabro-sh/fabro's own configuration. It tells Codex and OpenCode how to work on fabro itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything fabro configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is fabro-server = { path = "../fabro-server" }.

not rated 1.8krepo +33 changed 1mo ago A scan 7,248 tokens original MIT
View source ↗ fabro-sh/fabro fabro.sh
About the project

Fabro is an open-source system for defining software-development workflows as graphs that AI coding agents execute with verification steps and opportunities for human intervention. Expert engineers and teams use it to coordinate agent tasks, combine models, share version-controlled processes, run agents in isolated sandboxes, and queue work through an API server. The catalogue entries are Fabro-specific skills, instructions, hooks, and settings for working with the system.

fabro-sh/fabro · 1,812 stars · on GitHub · fabro.sh

Reuse

Borrowing it

Nothing to install: this file belongs to fabro-sh/fabro. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/fabro-sh/fabro/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/fabro-sh/fabro

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 7,248 This file is loaded in full into every session.
When invoked 7,248 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.07248 $0.07248
Opus 5.5 $0.02899 $0.02899
Sonnet 5.5 $0.01450 $0.01450
Haiku 4.5 $0.00725 $0.00725

Measured 1mo ago against content hash c71d04f11fec, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fabro 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.

AGENTS.md · 331 lines

How it starts

The opening of the file, as written. The whole thing — 331 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Build and test commands

Rust

  • cargo build --workspace — build all crates
  • cargo nextest run --workspace — run all unit tests
  • cargo nextest run -p fabro-server — test a single crate
  • cargo nextest run -p fabro-workflow -- test_name — run a single test
  • set -a && source .env && set +a && cargo nextest run --workspace --profile e2e --run-ignored only — run all E2E live tests (requires credentials in .env, see .env.example)
  • set -a && source .env && set +a && cargo nextest run -p fabro-llm --profile e2e --run-ignored only — run E2E tests for a single crate
  • cargo +nightly-2026-04-14 fmt --check --all — check formatting (pinned nightly required for rustfmt config; CI uses the same date)
  • cargo +nightly-2026-04-14 fmt --all — auto-format
  • cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings — lint (CI runs nightly clippy to match; install with rustup toolchain install nightly-2026-04-14 --profile minimal --component clippy,rustfmt)

macOS note: if cargo nextest run fails with Too many open files (os error 24) / EMFILE, raise the shell's soft FD limit before running tests, for example ulimit -n 4096 && cargo nextest run --workspace. Some terminals and inherited agent sessions start with ulimit -n 256, which is too low for the shared CLI test daemon under parallel nextest load.

TypeScript (fabro-web)

  • cd apps/fabro-web && bun run dev — rebuild web assets on change for the Rust server; refresh the browser manually
  • cd apps/fabro-web && bun test — run tests
  • cd apps/fabro-web && bun run typecheck — type check
  • cd apps/fabro-web && bun run build — production build (writes to apps/fabro-web/dist/ only; does NOT update the bundled SPA that ships in the Rust binary)
  • cargo dev build [-- <cargo args>] — refreshes the embedded SPA assets from the production build, verifies SPA asset budgets, and then runs cargo build with forwarded args. The embedded assets are gitignored except for .gitkeep; use this when building a Rust binary that should include a populated SPA bundle. bun run dev for local development is unchanged because debug builds prefer apps/fabro-web/dist/ on disk via the server fallback.

Read the full file on GitHub · 331 lines

Changes

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.

  1. 1mo ago Changed · +26 lines · +412 tokens per session c71d04f11fec
  2. 1mo ago Changed · +4 tokens per session 9a991f141b71
  3. 1mo ago Changed · -2 lines · -265 tokens per session 4a56724fd08f
  4. 1mo ago Changed · +106 lines · +2,590 tokens per session bdab1f0b214d
  5. 1mo ago Changed · -1 lines · +74 tokens per session ced2fec32565
  6. 1mo ago Changed · +2 lines · +95 tokens per session dfa70108b46a
  7. 2mo ago First seen · 200 lines · 4,338 tokens per session scan A 7fb941a21b75

Subscribe to this mod's changes

fabro AGENTS.md is an instructions file published in the GitHub repository fabro-sh/fabro (1,812 stars, last pushed yesterday), licensed MIT. It adds 7,248 tokens to every session, about $0.0290 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.

Related

fabro AGENTS.md compared with instructions from other repositories

fabro AGENTS.md next to 6 instructions from other repositories
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deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode