Proof Assistant Skill

SkillDev tools

Assist in constructing algorithm correctness proofs

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Then ask your AI: use the Proof Assistant Skill skill

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/algorithms-optimization/skills/proof-assistant/SKILL.md and read by ahel’s review.

Purpose

Assist in constructing formal correctness proofs for algorithms using standard proof techniques.

Capabilities

  • Proof structure templates (induction, contradiction, etc.)
  • Step-by-step proof guidance
  • Termination argument generation
  • Proof review and validation
  • Identify proof gaps

Target Processes

  • correctness-proof-testing
  • algorithm-implementation

Proof Techniques

Mathematical Induction

  • Base case identification
  • Inductive hypothesis formulation
  • Inductive step construction

Proof by Contradiction

  • Assumption negation
  • Logical derivation
  • Contradiction identification

Loop Invariant Proofs

  • Invariant specification
  • Three-part proof (init, maintenance, termination)

Structural Induction

  • For recursive data structures
  • Base case (leaf/empty)
  • Inductive case (composite)

Input Schema

{
  "type": "object",
  "properties": {
    "algorithm": { "type": "string" },
    "code": { "type": "string" },
    "proofType": {
      "type": "string",
      "enum": ["induction", "contradiction", "invariant", "structural"]
    },
    "claim": { "type": "string" },
    "partialProof": { "type": "string" }
  },
  "required": ["algorithm", "claim"]
}

Output Schema

{
  "type": "object",
  "properties": {
    "success": { "type": "boolean" },
    "proof": { "type": "string" },
    "structure": { "type": "array" },
    "gaps": { "type": "array" },
    "suggestions": { "type": "array" }
  },
  "required": ["success"]
}

Signals

GitHub stars
2k
Forks
112
Last commit
Sep 2026
Advanced
Item type
skill
Key
proof-assistant
Source
github.com/a5c-ai/babysitter