crucible

crucible is a skill for Claude Code from damionrashford/Adversaria. It costs 72 tokens per session (1,515 once invoked), scanned A, original, MIT.

A structured way to test an idea, proposal, or plan by looking for weak points, hidden assumptions, and ways it could fail.

In plain words
What is it for?
Use it to challenge plans, find failure modes, ask probing questions, and run a red-team review of an idea.
Why use it?
It helps expose problems before they become costly or difficult to fix. It also turns vague doubts into specific questions.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the adversaria plugin — 5 skills, 3 agents, 4 hooks shipped together

Good fit Use it to challenge plans, find failure modes, ask probing questions, and run a red-team review of an idea.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add damionrashford/Adversaria
Claude Code
/plugin install adversaria

Made for: Claude Code.

Or install adversaria, the plugin that ships this one along with the rest of its 5 skills, 3 agents, 4 hooks.

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.

agentmods badge for crucible

README.md
[![agentmods](https://agentmods.dev/badge/skills/damionrashford/adversaria/crucible/github.svg)](https://agentmods.dev/skills/damionrashford/adversaria/crucible)
Your own site
<a href="https://agentmods.dev/skills/damionrashford/adversaria/crucible"><img src="https://agentmods.dev/badge/skills/damionrashford/adversaria/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.

agentmods 80×15 button for crucible

Your own site · 80×15
<a href="https://agentmods.dev/skills/damionrashford/adversaria/crucible"><img src="https://agentmods.dev/badge/skills/damionrashford/adversaria/crucible.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,515 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00072 $0.01515
Opus 5 $0.00036 $0.00758
Sonnet 5 $0.00014 $0.00303
Haiku 4.5 $0.00007 $0.00152

Measured 9d ago against content hash 703db68efb51, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, 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 9d 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.

skills/crucible/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Crucible

Context: $ARGUMENTS

Find everything wrong with this idea. Socratic questioning, hostile review, and adversarial simulation.

Workflow

1. Initialize (or pick up existing graph)

Check if a graph already exists from a prior steelman:

bun "${CLAUDE_PLUGIN_ROOT}/scripts/argument-graph.ts" show

If empty or no prior state, build the graph from scratch. Identify the idea's core claims and assumptions and register them:

bun "${CLAUDE_PLUGIN_ROOT}/scripts/argument-graph.ts" reset
bun "${CLAUDE_PLUGIN_ROOT}/scripts/argument-graph.ts" add "<claim-id>" claim --obs "<fact>" --agent adversary
bun "${CLAUDE_PLUGIN_ROOT}/scripts/argument-graph.ts" add "<assumption-id>" assumption --obs "<fact>" --agent adversary
bun "${CLAUDE_PLUGIN_ROOT}/scripts/argument-graph.ts" relate "<claim-id>" assumes "<assumption-id>" --agent adversary

If a graph already exists, use it directly.

2. Socratic Elenchus (probe assumptions)

Read ${CLAUDE_PLUGIN_ROOT}/references/socratic-method.md.

Apply Vlastos' steps:

  1. Identify the thesis (what the idea claims)
  2. Identify premises the proponent would agree with
  3. Show how those premises lead to conclusions that CONTRADICT the thesis

Ask 3-5 penetrating questions. Each question targets a specific assumption. Present the questions to the user.

3. Structural analysis

Run the graph analysis to find gaps the questions should have exposed:

bun "${CLAUDE_PLUGIN_ROOT}/scripts/argument-graph.ts" analyze

This reveals ungrounded_assumptions (nothing supports them), unstable_claims (with failed_dependencies naming what they rest on that isn't established), exposed_weaknesses (still standing — nothing countered them), most_contested_claims, circular_reasoning (dependency cycles), orphaned_entities (attached to nothing), and labels — the current IN/OUT/UNDECIDED standing of every node.

Read labels before attacking. A node already OUT has been defeated; attacking it again wastes the round.

Read the full file on GitHub · 127 lines

Files

What ships with it

3 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.

  1. 9d ago Changed · +9 lines 703db68efb51
  2. 12d ago First seen · 118 lines · 72 tokens per session scan A 245e26d9b11d

Subscribe to this mod's changes

crucible is a skill published in the GitHub repository damionrashford/Adversaria (7 stars, last pushed 10d ago), licensed MIT. It adds 72 tokens to every session and 1,515 once invoked, about $0.0004 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.

Related

Other skills, from other repositories

simulator-charts

Simulator.Company chart and dashboard specialist. Use when the user wants to create, configure, or query charts (line, bar, area), dashboards, or financial time-series visualisations on a graph layer. Trigger on any of these intents: — Creating: "create chart", "add chart", "create dashboard", "add dashboard", "build…

corezoid/simulator-ai-plugin · 185 tokens

simulator-init

Simulator.Company environment setup specialist. Use when the user wants to connect to Simulator.Company, set up credentials, authenticate, configure the workspace, or start working with Simulator for the first time. Activate when the user says "init", "setup", "connect to simulator", "login to simulator", "configure…

corezoid/simulator-ai-plugin · 77 tokens

nothumansearch

Search and score AI-ready websites via MCP. Find MCP servers, check site AI-readiness scores, and verify MCP endpoint compliance using the Not Human Search API at nothumansearch.ai.

unitedideas/nothumansearch · 42 tokens

commit

A project-specific helper for committing changes in the simulator-ai-plugin repository, including the required version updates.

corezoid/simulator-ai-plugin · 49 tokens

closing-costs

This skill is a presentation guide for showing itemized refinance closing costs to borrowers. All dollar amounts come from the pricer calculateclosingcost MCP tool, which is the single source of truth for closing cost figures. This skill tells you how to format and present those numbers, how to explain them to the…

lendtrain/mortgage · 0 tokens

mortgage-loan-officer

You are a knowledgeable mortgage loan officer assistant. Your role is to guide borrowers through a refinance evaluation by collecting information, extracting data from mortgage statements, analyzing refinance scenarios, and delivering clear recommendations. You combine deep mortgage expertise with consumer-friendly…

lendtrain/mortgage · 0 tokens