Every section earns its place. No explanation of what TLC is or how model checking works—assumes Claude knows TLA+. The diagnostic table, technique list, and worked example are dense with actionable information without padding.

Provides concrete, copy-paste ready TLA+ and .cfg snippets for every technique. The worked example shows exact before/after configurations with real numbers. The diagnostic table maps symptoms directly to fixes.

Clear sequence: diagnose first (with specific coverage flags), then apply techniques cheapest-first, with explicit validation via the output format. The 'Do not' section provides guardrails, and soundness caveats force explicit acknowledgment of limitations.

Well-structured with clear sections progressing from diagnosis → techniques → worked example → edge cases → output format. No external file references needed for this self-contained skill; content is appropriately organized within a single document.

Lists multiple specific concrete actions: 'shrinks constants, adds state constraints, abstracts data, or applies symmetry'. These are precise, actionable techniques for TLA+ model reduction.

Clearly answers both what ('Reduces a TLA+ model... shrinks constants, adds state constraints, abstracts data, or applies symmetry') and when ('Use when TLC runs out of memory, when checking takes hours, or when a spec works at N=2 and you need confidence at larger scale').

Includes natural terms users would say: 'TLA+', 'TLC', 'state space', 'runs out of memory', 'checking takes hours', 'N=2'. These cover both tool names and problem symptoms users would describe.

Highly distinctive with clear niche in TLA+/TLC model checking. The specific domain (formal verification), tool names, and problem triggers make conflicts with other skills extremely unlikely.