source-agents: Instructions file for Codex

AGENTS.md

source-agents AGENTS.md is an instructions file for Codex, OpenCode from iannuttall/source-agents. It costs 582 tokens per session, scanned A, original, MIT.

Repository instructions for a TypeScript command-line project with a text-based interface. They document its folders, commands, code style, and testing expectations.

In plain words
What is it for?
Use them when editing the project, especially when finding source files, installing dependencies, running type checks, building the command-line tool, or checking contribution conventions.
Why use it?
They give coding agents the project-specific rules they need to make changes that fit the existing codebase and pass its checks.

Instructions file for CodexOpenCode

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

This is iannuttall/source-agents's own configuration. It tells Codex and OpenCode how to work on source-agents 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 source-agents configures →

Reuse

Borrowing it

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

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 source-agents AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/iannuttall/source-agents/agents-md"><img src="https://agentmods.dev/badge/instructions/iannuttall/source-agents/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 source-agents AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/iannuttall/source-agents/agents-md"><img src="https://agentmods.dev/badge/instructions/iannuttall/source-agents/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 582 This file is loaded in full into every session.
When invoked 582 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 $0.00582 $0.00582
Opus 5.5 $0.00233 $0.00233
Sonnet 5.5 $0.00116 $0.00116
Haiku 4.5 $0.00058 $0.00058

Measured 2mo ago against content hash d676f74df68b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

source-agents 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 · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Guidelines

Project Structure & Modules

  • Source lives in src/ with ESM TypeScript.
    • CLI entry: src/cli.tsx → built to dist/cli.js.
    • UI: src/components/ (Ink + React).
    • Logic: src/services/ (scanner, analyzer, executor).
    • Helpers: src/utils/, shared types in src/types/.
  • Build output in dist/ (committed artifacts are not expected).

Build, Test, and Dev

  • Install: bun install
  • Dev TUI: bun run dev --root ~/projects (use --auto, --dry-run, --exclude as needed).
  • Type‑check: bun run type-check
  • Build: bun run build (emits ESM to dist/).
  • Start built CLI: node dist/cli.js --help
  • CI runs type‑check, build, and a smoke CLI help check.

Coding Style & Naming

  • TypeScript strict, ESM imports, 2‑space indent.
  • Components: PascalCase files (ResultsTable.tsx, ActionMenu.tsx).
  • Services/Utils/Types: lowercase filenames (scanner.ts, paths.ts, index.ts).
  • Use camelCase for variables/functions, UPPER_SNAKE_CASE for constants, named exports preferred.
  • Keep functions small and pure in services/; UI logic stays in components/.

Testing Guidelines

  • No formal test suite yet; contributions welcome.
  • Prefer Vitest for unit tests; place tests under src/**/__tests__ with *.test.ts.
  • Target high‑value coverage for services/ (scanner/analyzer/executor). Aim for 80%+ on touched files.
  • Add lightweight CLI smoke tests if feasible.

Commit & Pull Requests

  • Use Conventional Commits: feat:, fix:, docs:, refactor:, chore:.
  • Scope clearly and write imperative, present‑tense summaries (≤72 chars).
  • PRs should include: summary, motivation, screenshots or sample CLI output, steps to verify, and linked issues.
  • Keep diffs focused; update README or this file if behavior changes.

Security & Configuration

  • Requires Node 18+ and Bun 1.1+. ESM only.
  • Use --dry-run for potentially destructive actions; limit scans with --root.
  • Default excludes: node_modules, .git, dist, common build caches. Add extras via --exclude.

Read the full file on GitHub · 46 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. 2mo ago First seen · 46 lines · 582 tokens per session scan A d676f74df68b

Subscribe to this mod's changes

source-agents AGENTS.md is an instructions file published in the GitHub repository iannuttall/source-agents (123 stars, last pushed 1y ago), licensed MIT. It adds 582 tokens to every session, about $0.0023 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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