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proof-failure-explainer

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Analyze and explain why Isabelle or Coq proofs fail, identifying the root cause such as type mismatches, missing assumptions, incorrect goals, unification failures, or inapplicable tactics. Use when the user encounters proof failures, error messages in formal verification, stuck proof states, or asks why their Isabelle/Coq proof doesn't work.

skills/proof-failure-explainer/SKILL.md

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# Proof Failure Explainer

## Overview

Diagnose and explain proof failures in Isabelle and Coq by analyzing proof states, error messages, and goal structures. This skill helps identify root causes and suggests fixes for common proof problems.

## Analysis Workflow

### Step 1: Gather Context

Collect information about the failure:

1. **Proof state:**
   - Current goal(s)
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