forge: Instructions file for Codex

AGENTS.md

forge AGENTS.md is an instructions file for Codex, OpenCode from erewhon/forge. It costs 410 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for Forge, a Python project containing agent packages, a command-line tool, and an MCP server. They describe coding conventions, testing, formatting, configuration, and integration boundaries.

In plain words
What is it for?
Use them when changing Forge packages, running tests or linting, handling task storage, or working with the optional Nous integration.
Why use it?
They give an agent the project rules needed to make compatible changes and avoid committing local settings or breaking optional integrations.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is erewhon/forge's own configuration. It tells Codex and OpenCode how to work on forge 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 forge configures →

Reuse

Borrowing it

Nothing to install: this file belongs to erewhon/forge. 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/erewhon/forge/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/erewhon/forge

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for forge AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/erewhon/forge/agents-md/github.svg)](https://agentmods.dev/instructions/erewhon/forge/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/erewhon/forge/agents-md"><img src="https://agentmods.dev/badge/instructions/erewhon/forge/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.

agentmods 80×15 button for forge AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/erewhon/forge/agents-md"><img src="https://agentmods.dev/badge/instructions/erewhon/forge/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 410 This file is loaded in full into every session.
When invoked 410 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 $0.00410 $0.00410
Opus 5.5 $0.00164 $0.00164
Sonnet 5.5 $0.00082 $0.00082
Haiku 4.5 $0.00041 $0.00041

Measured 2mo ago against content hash 6b77162a2d97, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

forge 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 2mo 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 · 30 lines

What it actually says

forge — agent notes

Front door for the erewhon code agents: the forge CLI and forge-mcp MCP server over the agent packages in forge/<package>/. Human-facing docs live in README.md; per-package READMEs cover each agent.

Conventions

  • Python 3.12+, uv-managed. Run everything through uv run ... from the repo root.
  • Tests: uv run pytest forge/<package> for one package, uv run pytest for the suite.
  • Lint/format: uv run ruff check . and uv run ruff format . (line length 100).
  • Typed code with pydantic models throughout. Settings are pydantic-settings classes with per-agent env prefixes; a .env at the repo root holds machine-local values and is never committed.
  • Nous integration is optional (the [nous] extra). Anything touching it must import lazily/guarded — see forge/shared/task_store.py and forge/task_worker/nous_client.py for the pattern. TASK_STORE_BACKEND=github must always work without nous installed.
  • Pure signal/parse helpers stay separate from network fetchers, and fetchers are injectable for tests (see forge/dependabot/supply_chain.py).
  • Write errors for the next attempt, not the stack-trace reader: any error on a path a loop retries (worker outcomes, task-store writes, dispatch preflight, executor failures) must state the failed expectation and the likely remedy, then the evidence — never a bare status or exception. See docs/error-surface-audit.md.

Boundaries for autonomous workers

  • Do not modify .task_worker/ or anything inside it (worker plumbing and task specs).
  • Do not commit .env or log files.
  • Keep the diff scoped to the files named in the task spec.
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. 2mo ago First seen · 30 lines · 410 tokens per session scan A 6b77162a2d97

Subscribe to this mod's changes

forge AGENTS.md is an instructions file published in the GitHub repository erewhon/forge (0 stars, last pushed 18d ago), licensed Apache-2.0. It adds 410 tokens to every session, about $0.0016 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 2026-08-31.

Related

forge AGENTS.md compared with instructions from other repositories

forge AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
forge AGENTS.mderewhon/forgeInstructions file018d agoApache-2.0A410Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,685GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA2,022GitHub Copilot