Borrowing it
Nothing to install: this file belongs to Larens94/codedna. 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/Larens94/codedna/main/AGENTS.mdgit clone --depth 1 https://github.com/Larens94/codednaWrote 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/larens94/codedna/agents-md)<a href="https://agentmods.dev/instructions/larens94/codedna/agents-md"><img src="https://agentmods.dev/badge/instructions/larens94/codedna/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/larens94/codedna/agents-md"><img src="https://agentmods.dev/badge/instructions/larens94/codedna/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 | $0.03041 | $0.03041 |
| Opus 5.5 | $0.01216 | $0.01216 |
| Sonnet 5.5 | $0.00608 | $0.00608 |
| Haiku 4.5 | $0.00304 | $0.00304 |
Grade A, and why
codedna 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- codedna CLAUDE.md — 88% identical, 40 lines differ
How it starts
The opening of the file, as written. The whole thing — 274 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CodeDNA v0.9 — Protocol for AI Coding Agents (Codex, OpenCode, Aider, GitHub Copilot CLI, etc.)
This project uses the CodeDNA in-source communication protocol. Follow these rules on every file operation.
Reading files
- Read the CodeDNA module header at the top of every supported source file before reading any code. Python uses a module docstring; other languages use their native comment syntax.
- Parse
exports:— these are symbols you must never rename or remove without explicit instruction. - Parse
used_by:— callers that depend on this file. Do not follow all of them blindly. Ask: "does this caller's domain intersect with my current task?" Only explore callers relevant to the specific change you're making. - Parse
related:— files sharing the same logic without importing each other. Same filter: is it relevant to this task? - Parse
rules:— hard constraints for every edit in this file; read before writing any logic. - Parse
agent:— session history written by previous agents; read to understand why the current state exists. - For any function with a
Rules:docstring, read and respect those before writing logic.
Required command workflow
Use the audit commands as evidence gates:
| When | Command | Agent action |
|---|---|---|
| First session/onboarding | codedna doctor --path . |
Fix ERROR items before editing. Report WARNING items as optional integrations. |
| Before changing a public file or symbol | codedna impact <file-or-symbol> --path . |
Read every MATCH rule and inspect domain-relevant AFFECTS files. Exit 1 means resolve the correct query before editing. |
| After structural edits | codedna verify . |
Exit 1 means review evidence, run codedna refresh ., then verify again. Never overwrite semantic rules:. |
| Automation/CI | add --json |
Parse stable structured fields. Exit 0 passes; exit 1 reports actionable findings. |
verify proves structural consistency only (exports: and used_by:); it does not certify that natural-language rules: are semantically true.
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 · 274 lines · 3,041 tokens per session scan A 4009c72dfd7b
codedna AGENTS.md is an instructions file published in the GitHub repository Larens94/codedna (151 stars, last pushed 9d ago), licensed MIT. It adds 3,041 tokens to every session, about $0.0122 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.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
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).