DM-Code-Agent AGENTS.md

A repository instruction file describing the purpose, development rules, verification steps, and important modules for a coding agent.

In plain words
What is it for?
Use it to guide maintenance work in the DM-Code-Agent repository and define constraints for code changes, tests, and debugging files.
Why use it?
It gives coding agents consistent project-specific rules, including how to preserve original data, keep tests deterministic, and handle sensitive traces.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/hwfengcs/dm-code-agent/agents-md
Clone the repo
git clone --depth 1 https://github.com/hwfengcs/DM-Code-Agent

Made for: Codex, OpenCode.

Per session 1,264 This file is loaded in full into every session.
When invoked 1,264 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.01264 $0.01264
Opus 5 $0.00632 $0.00632
Sonnet 5 $0.00253 $0.00253
Haiku 4.5 $0.00126 $0.00126

Measured 2d ago against content hash 7ab5b6837b7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

DM-Code-Agent 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 2d 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 · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for coding agents working in this repository.

Project Intent

DM-Code-Agent is a local-first, auditable code maintenance agent. Favor changes that improve real repository maintenance, traceability, reproducibility, and benchmark quality.

Development Rules

  • Keep the core agent readable. Prefer small, explicit modules over large abstractions.
  • Ask first: does this have to live in the kernel? If a feature only needs to act at a few fixed points, it belongs in an extension (docs/extensions.md), not in a new --enable-xxx flag plus an if branch in ReactAgent.
  • Never delete original data. Compaction, truncation, and summarization may only append a derived record and skip the original when building context — never overwrite or drop it. This is what makes the agent debuggable, auditable, and ablatable.
  • Do not introduce network calls into tests unless they are clearly marked as live-model tests.
  • Default tests and deterministic evals must run without API keys.
  • Treat session/trace files as potentially sensitive. Full LLM I/O capture must remain opt-in; --trace stays redacted and --trace/--checkpoint must not point at the same file.
  • Tool replay that mutates files or runs commands must remain explicit and documented.
  • Keep benchmark tasks executable with plain pytest hidden tests.
  • When changing benchmark behavior, update tests and docs together.
  • Do not claim evaluation numbers that were not actually run. The scoreboard is the bundled coding + maintenance benchmark (13 hidden-test tasks). Real SWE-bench / Docker / cross-model scoring is frozen.
  • Do not mix a fix into a pure-refactor commit — it destroys the "eval identical field by field" check that makes the refactor verifiable.

Verification

Before considering a change complete, run:

python -m compileall dm_agent main.py tests
python -m pytest
python -m dm_agent.evals.cli --variant full --task direct_finish
python -m dm_agent.benchmarks.cli --suite maintenance --list
python -m ruff check .
python -m black --check .
python -m mypy dm_agent

Read the full file on GitHub · 98 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. 2d ago First seen · 98 lines · 1,264 tokens per session scan A 7ab5b6837b7e

Subscribe to this mod's changes

DM-Code-Agent AGENTS.md is an instructions file published in the GitHub repository hwfengcs/DM-Code-Agent (151 stars, last pushed 6d ago), licensed MIT. It adds 1,264 tokens to every session, about $0.0063 per session on Opus 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.