---

name: sorry-checker description: Check that no sorry placeholders exist in the codebase. Use after making changes or when asked to verify proof completeness.

Verify No Sorry

This skill checks that the codebase contains no sorry placeholders, which is a critical requirement for this project.

Quick Check

Run this command to find any sorries:

Copygrep -r "sorry" Metatheory/ --include="*.lean"

Expected output: No matches (empty output).

Full Verification

Build the project to verify all proofs compile:

Copylake build

A successful build with no warnings about sorry confirms the codebase is complete.

What to Do If Sorries Are Found

Option 1: Complete the Proof Manually

Look at similar proofs nearby and mirror their style.

Option 2: Use Aristotle

For difficult proofs, use the aristotle skill to get automated proof suggestions.

Option 3: Extract Helper Lemmas

If a proof is stuck, break it into smaller pieces:

Copy-- Instead of one complex proof
theorem big_theorem : ... := by
  sorry

-- Extract helpers
lemma helper1 : ... := by
  ...

lemma helper2 : ... := by
  ...

theorem big_theorem : ... := by
  apply helper1
  apply helper2

Project Policy

sorry is NEVER acceptable in commits to this codebase.

All theorems must be fully proven before merging.