debate

A skill for running a structured, multi-round discussion between Claude and GPT. It compares their positions on a question and has Claude produce a final judgment.

In plain words
What is it for?
Debating architecture decisions, comparing competing approaches, and asking for a second opinion with context from the codebase when available.
Why use it?
It helps expose weaknesses in an architecture choice or other technical decision by getting a second model to challenge it.

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

Made for: Claude Code, Codex.

Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 690 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 $0.00034 $0.00690
Opus 5 $0.00017 $0.00345
Sonnet 5 $0.00007 $0.00138
Haiku 4.5 $0.00003 $0.00069

Measured yesterday against content hash 5dc96ee1cbfb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 yesterday.

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.

skills/debate/SKILL.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/debate — Multi-Round Claude vs GPT Debate

Usage

/debate "<topic or question>"

Description

Structured 3-round debate between Claude (native) and GPT (via Codex CLI). Claude and GPT take positions, critique each other, then Claude synthesizes a verdict. Tessera graph context is used when available.

Instructions

Phase 0: Context

  1. If tessera MCP is configured in this session, call graph_continue then graph_retrieve with the debate topic keywords to pull relevant codebase context.
  2. Note any architectural patterns, constraints, or decisions relevant to the topic.

Phase 1: Claude's Initial Position

Formulate a clear stance on the topic with 3 supporting reasons. Include any codebase context found. State what would change your mind.

Phase 2: GPT's Position (Round 1)

Send the topic and context to Codex:

codex exec "You are a senior software architect in a structured debate. Topic: <TOPIC>. Codebase context (if any): <CONTEXT>. Give: (1) your clear stance, (2) top 3 reasons, (3) biggest risk of your approach, (4) what evidence would change your mind. Be direct and specific. No hedging."

Record GPT's full position.

Phase 3: Claude's Critique + GPT's Response (Round 2)

Claude critiques GPT's position: identify flawed assumptions, missing edge cases, or contradictions with project constraints. Then send:

codex exec "Debate round 2. Topic: <TOPIC>. Your position: <GPT_POSITION>. Claude's critique: <CLAUDE_CRITIQUE>. Respond: either defend your stance with new evidence OR concede specific points. If you concede, state what you now believe. Be precise."

Phase 4: Synthesis

Claude produces the final verdict:

  • Summarize both positions
  • Note where agreement was reached
  • Note where genuine disagreement remains
  • Issue a clear recommendation with confidence level (high / medium / low)

Phase 5: Lock Decision (if tessera available)

If tessera MCP is active and the debate reached a clear verdict, lock it permanently:

graph_lock_decision(
  summary = "<topic>: <verdict and rationale in one sentence>",
  scope   = "project" | "module",
  files   = [<files the decision applies to, if any>]
)

This persists the debate outcome so graph_continue surfaces it in future turns and graph_action_summary can reference it. Do NOT call graph_action_summary to record — that is for reading history, not writing. graph_lock_decision is the write path.

Read the full file on GitHub · 72 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. yesterday First seen · 72 lines · 34 tokens per session scan A 5dc96ee1cbfb

Subscribe to this mod's changes

debate is a skill published in the GitHub repository dr-code/tessera (1 stars, last pushed 21d ago), licensed MIT. It adds 34 tokens to every session and 690 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 2026-08-31.

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