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opencode-forge: Instructions file for Codex

AGENTS.md

opencode-forge AGENTS.md is an instructions file for Codex, OpenCode from chriswritescode-dev/opencode-forge. It costs 2,876 tokens per session, scanned A, original, MIT.

Project instructions for opencode-forge, a codebase with a server plugin, terminal interface, installer command-line tool, and web dashboard. They document its package boundaries, required tools, and verification commands.

In plain words
What is it for?
Use them when installing dependencies, changing server or terminal plugins, working on the installer or dashboard, or running type checks, linting, builds, and tests.
Why use it?
They clarify which runtimes and checks the project expects, including the requirement to build before running tests.

Instructions file for CodexOpenCode

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

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

not rated 13repo changed 5d ago A scan 2,876 tokens original MIT
View source ↗ chriswritescode-dev/opencode-forge
Reuse

Borrowing it

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

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/chriswritescode-dev/opencode-forge/agents-md"><img src="https://agentmods.dev/badge/instructions/chriswritescode-dev/opencode-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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/chriswritescode-dev/opencode-forge/agents-md"><img src="https://agentmods.dev/badge/instructions/chriswritescode-dev/opencode-forge/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,876 This file is loaded in full into every session.
When invoked 2,876 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 $0.02876 $0.02876
Opus 5.5 $0.01150 $0.01150
Sonnet 5.5 $0.00575 $0.00575
Haiku 4.5 $0.00288 $0.00288

Measured 5d ago against content hash b336fb1846e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

opencode-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 5d 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 · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Guide

Toolchain and checks

  • Install with pnpm install --frozen-lockfile; pnpm-lock.yaml is canonical. Bun is still required because build, setup, and dashboard scripts run through it—do not substitute bun install.
  • Full verification: pnpm build && pnpm typecheck && pnpm lint && pnpm test. Build must precede tests because test/dashboard/app-bundle.test.ts rejects a stale source hash.
  • Focus a Node test with pnpm test --project node test/path.test.ts; add -t "test name" for one case. Run dashboard DOM tests with pnpm test --project dom test/dashboard/app-dom.test.ts. The dom project is the only happy-dom suite; all other tests use the node project and a bun:sqlite shim.
  • pnpm typecheck covers src/, not tests or scripts. ESLint also ignores tests and generated dashboard files.

Package surfaces

  • Server plugin src/index.ts — published as root (.) and ./server alias. TUI plugin src/tui.tsx. Installer CLI src/install/cli.ts (bin). Standalone dashboard via pnpm dashboard (scripts/dashboard.ts); not a package export.
  • src/index.ts is the server entry; the host-neutral composition root is createForgeCore in src/host/forge-core.ts, wrapped by the OpenCode 2.x adapter in src/host/v2.ts. Forge supports OpenCode 2.x only. Core boundaries: src/loop/ (runtime/state machine), src/storage/ (database and repositories), src/tools/ (OpenCode tools), src/agents/ (agent definitions).

Generated and bundled files

  • pnpm build rewrites src/version.ts, src/dashboard/marked-source.ts, and src/dashboard/app-bundle.ts. Edit package.json, src/dashboard/marked.min.js, or src/dashboard/app/ respectively, never the generated files.
  • pnpm build removes the output directory before compiling (scripts/build.ts), so deleting or renaming source modules cannot leave stale output in dist/.
  • scripts/build.ts runs tsc first, then Bun.build overwrites dist/index.js (server) and dist/tui.js (TUI) with self-contained bundles. Both must stay bundled so the plugin loads without resolving node_modules; the vendored installer mode (bunx opencode-forge --vendor) depends on it. @opentui/*, @opencode/plugin/tui, solid-js, and bun:sqlite stay external because opencode's runtime provides them. Import other @opencode/* packages type-only (the FORGE_RPC contract is a plain object checked with satisfies) so their runtime stays out of the bundles.
  • resolveShippedRoot in src/utils/shipped-paths.ts is the only way to locate shipped files on disk. Never derive paths from import.meta.url directly: bundling collapses it, which would silently break the migration SQL loader, prompt loading, and bundled-asset sync.
  • Bundled prompts (src/prompts/) and skills (skills/) sync on every plugin load, preserving user edits. The standalone installer handles conflicts and orphan pruning.
  • docs/api/ is generated by pnpm docs:api (typedoc, cleanOutputDir: true), including the docs/api/_media/ copies of docs/*.md. Edit docs/*.md and regenerate; never hand-edit or hand-copy anything under docs/api/.
  • The section-summary block template is the single SECTION_SUMMARY_TEMPLATE in src/loop/prompts.ts, built from the marker constants in src/utils/section-summary.ts; do not hand-write the marker strings into prompt markdown files or other prompt builders.

Read the full file on GitHub · 56 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. 5d ago Changed · +59 tokens per session b336fb1846e2
  2. 7d ago Changed · +5 lines · +270 tokens per session 35d5fc052d7f
  3. 28d ago Changed · +228 tokens per session a9f801b4b130
  4. 1mo ago Changed · +2 lines · +402 tokens per session 42d526a4ebae
  5. 1mo ago Changed · +65 tokens per session 458212215d67
  6. 1mo ago Changed · +2 lines · +159 tokens per session e5fe3c68ec78
  7. 1mo ago First seen · 47 lines · 1,693 tokens per session scan A 2414f72b054e

Subscribe to this mod's changes

opencode-forge AGENTS.md is an instructions file published in the GitHub repository chriswritescode-dev/opencode-forge (13 stars, last pushed 6d ago), licensed MIT. It adds 2,876 tokens to every session, about $0.0115 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.

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