A structured debate skill for difficult decisions. It asks several specialist perspectives to challenge an idea, then produces a combined verdict; in some environments, the discussion is saved for later use.

Evaluating product directions, side projects, career moves, and other decisions where being wrong would be expensive.

It exposes risks and opposing views before you commit to a costly choice. It avoids using a large debate for simple questions.

crucible — Skill for Claude Code and Codex by mshadmanrahman

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.

Any agent

npx skills add mshadmanrahman/claudecode-guide --skill crucible

Clone the repo

git clone --depth 1 https://github.com/mshadmanrahman/claudecode-guide

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/mshadmanrahman/claudecode-guide/crucible/github.svg)](https://agentmods.dev/skills/mshadmanrahman/claudecode-guide/crucible)

Your own site

<a href="https://agentmods.dev/skills/mshadmanrahman/claudecode-guide/crucible"><img src="https://agentmods.dev/badge/skills/mshadmanrahman/claudecode-guide/crucible/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/mshadmanrahman/claudecode-guide/crucible"><img src="https://agentmods.dev/badge/skills/mshadmanrahman/claudecode-guide/crucible.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 114 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,666 The whole file, excluding the scripts and references it only reads on demand.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00114	$0.03666
Opus 5.5	$0.00046	$0.01466
Sonnet 5.5	$0.00023	$0.00733
Haiku 4.5	$0.00011	$0.00367

Measured 6d ago against content hash 82970fef2260, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

crucible 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 6d 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.

public/skills/crucible/SKILL.md · 240 lines

How it starts

The opening of the file, as written. The whole thing — 240 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Crucible

A council of specialized personas debates one idea under structured conflict. The chair synthesizes into a verdict. Transcripts are saved to disk so the thinking can be reused later.

Use this when the cost of being wrong is high enough to justify convening 5-10 subagents. For one-lens exploration without a debate, use Solo mode. For tactical questions that take under five minutes of normal thinking, don't use Crucible at all.

Where this runs

Claude Code (terminal, desktop app Code tab, IDE): full version. Personas run as parallel subagents with the Agent tool.
Claude in a chat (claude.ai, desktop Chat tab): there are no subagents. The chair plays each persona in turn, in separate labeled sections, and writes each opening before reading any other. Keep the rubrics and the verdict format exactly the same. Skip the transcript file; put the full debate in the reply above the verdict instead.

When to trigger

Trigger on explicit user invocation only. Examples:

/crucible <idea> (Decision mode default)
/crucible --council <idea> or /crucible --quick <idea> (Council mode)
/crucible --pm <idea> (PM Daily mode)
/crucible --solo <persona> <idea> or natural language ("give me the First Principles read on X")
/crucible --existential <idea>
"Run this through the crucible: ..."
"Convene the crucible on ..."

Do not auto-trigger. This is an expensive skill and the user decides when it runs.

Five modes

The chair selects the mode at intake based on the user's phrasing OR an explicit flag. Most daily use belongs in Council or Solo. Decision and Existential are for real decisions with real stakes.

Mode 1: Solo (single-persona lens, ~10-15 seconds)

Triggers: /crucible --solo <persona>, or natural language ("give me the First Principles read on X", "what does the Expansionist think about Y", "Track Record this for me").

Persona count: 1. No duels. No chair verdict. The chair's only job is persona-matching and returning the rubric output unchanged.

Read the full file on GitHub · 240 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

6d ago First seen · 240 lines · 114 tokens per session scan A 82970fef2260

Subscribe to this mod's changes

crucible is a skill published in the GitHub repository mshadmanrahman/claudecode-guide (45 stars, last pushed 2d ago), licensed MIT. It adds 114 tokens to every session and 3,666 once invoked, about $0.0005 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 2026-10-31.

Building agents Claude Code Planning ai-coding ai-tools anthropic claude developer-tools

crucible next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
cruciblemshadmanrahman/claudecode-guide	Skill	45	2d ago	MIT	A	114	Claude Code, Codex
microservices-architecturetravisjneuman/.claude	Skill	107	yesterday	MIT	A	30	Claude Code, Codex
accessibility-a11ytravisjneuman/.claude	Skill	107	yesterday	MIT	A	26	Claude Code, Codex
ai-ml-developmenttravisjneuman/.claude	Skill	107	yesterday	MIT	A	43	Claude Code, Codex
android-developmenttravisjneuman/.claude	Skill	107	yesterday	MIT	A	33	Claude Code, Codex
audio-productiontravisjneuman/.claude	Skill	107	yesterday	MIT	A	33	Claude Code, Codex
authentication-patternstravisjneuman/.claude	Skill	107	yesterday	MIT	A	28	Claude Code, Codex