code-debate

A protocol for two coding agents to review a code change from opposing positions through a shared DEBATE.md file.

In plain words
What is it for?
Use it for adversarial review of a commit, code diff, or pull request by starting one agent as A and another as B.
Why use it?
It gives the agents a common place to record an opening analysis and response, making disagreements and risks easier to inspect.

Skill for Claude CodeCodex

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 skills/mindroom-ai/mindroom/code-debate
Any agent
npx skills add mindroom-ai/mindroom --skill code-debate
Clone the repo
git clone --depth 1 https://github.com/mindroom-ai/mindroom

Made for: Claude Code, Codex.

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,647 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00035 $0.02647
Opus 5 $0.00017 $0.01324
Sonnet 5 $0.00007 $0.00529
Haiku 4.5 $0.00003 $0.00265

Measured 3d ago against content hash 5accf458a245, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-debate 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 3d 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.

.claude/skills/code-debate/SKILL.md · 236 lines

How it starts

The opening of the file, as written. The whole thing — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Debate Protocol

A protocol for two coding agents (Claude Code, Gemini CLI, Codex, or any other) to debate code changes through a shared file (DEBATE.md). Both agents receive this same prompt. Role is determined by the first argument.

This skill assumes the two debate participants are started externally by a human in separate sessions. It is not a peer-orchestration skill.

How to use

Open two terminal tabs with coding agents (same or different). Invoke this skill in each, specifying role and subject:

  • /code-debate A <subject> — opener, creates DEBATE.md with the first analysis
  • /code-debate B <subject> — responder, waits for DEBATE.md then replies

Role detection

Your role is determined by the first argument ($0):

  • A → you are Agent A (opener). Create DEBATE.md and write the opening position.
  • B → you are Agent B (responder). Poll and wait for DEBATE.md to exist, then read it and respond.

If no role argument is provided, fall back to file existence:

  • If DEBATE.md does not exist → you are Agent A (opener).
  • If DEBATE.md already exists → you are Agent B (responder).

Do not ask the user which role to play.

Non-simulation guardrails (MUST)

  • Never write content for the opposite role.
  • Never simulate, fabricate, or placeholder the other agent's response.
  • Never append both sides of a debate from one process.
  • Never create, spawn, launch, delegate to, summon, or recruit the opposite debate role.
  • Never use spawn_agent, send_input, tmux supervision, background shell automation, or any other tool to manufacture the missing peer.
  • Role is immutable for the run: once detected as Agent A or Agent B, keep that role until ## CONSENSUS.
  • If you are about to write the opposite role, stop and report protocol violation instead of writing.
  • After appending your section, only poll. Do not append another turn unless checksum changed and turn order confirms it is now your turn.
  • If checksum does not change, keep polling until timeout or ## CONSENSUS.
  • On timeout, append only a timeout ## CONSENSUS from your own role.

Read the full file on GitHub · 236 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. 3d ago First seen · 236 lines · 35 tokens per session scan A 5accf458a245

Subscribe to this mod's changes

code-debate is a skill published in the GitHub repository mindroom-ai/mindroom (254 stars, last pushed 3d ago), licensed Apache-2.0. It adds 35 tokens to every session and 2,647 once invoked, about $0.0002 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.

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