Content
67%Weight 40%Scale 1-5Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
A well-structured, highly actionable skill body with real Isabelle/Coq code covering all three refinement types and a clear stepwise process. Its weaknesses are token efficiency (conceptual overview and basic tactic listings Claude doesn't need, plus duplicated links) and the absence of error-recovery guidance when proof obligations fail.
Suggestions
Trim the Overview's conceptual explanation of what refinement is and the Step 5 lists of basic tactics (`auto`, `simp`, `destruct`, etc.) — this is knowledge Claude already has and it competes with conversation context.
Drop the duplicated "Additional Resources" section (or consolidate it into the earlier link points) so each reference file is linked exactly once from its most relevant section.
Add a brief error-recovery note in the Refinement Process for failed proof obligations (e.g., which tactic or lemma to reach for when a simulation proof stalls), turning the checklist into a genuine feedback loop.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The bulk is genuinely skill-specific code patterns, but there is avoidable overhead: the Overview explains what refinement is ("Refinement is the process of transforming abstract specifications into concrete implementations..."), Step 5 lists basic tactics Claude already knows ("`auto`, `simp`, `blast` for automation", "`destruct` for case analysis"), and the "Additional Resources" section repeats reference links already given inline. Mostly efficient, but it could be tightened. | 3 / 5 |
Actionability | Provides concrete, executable Isabelle and Coq code throughout — complete definitions, abstraction relations, and worked proofs (e.g., the structured induction proof for `find_impl_refines`) covering the common cases. Falls short of fully copy-paste ready because some proof obligations are placeholders, e.g., "(* Prove is_sorted and Permutation properties *) Qed." | 4 / 5 |
Workflow Clarity | A clear five-step sequence (Identify Abstraction Gap → Choose Strategy → Define Abstraction Relation → Generate Proof Obligations → Prove Obligations) with an explicit Verification Checklist of checkpoints before finalizing. Minor gap: no feedback-loop guidance for what to do when a proof obligation fails to discharge. | 4 / 5 |
Progressive Disclosure | Three real, one-level-deep reference files, each clearly signaled with "Key features" context and linked from relevant sections. Minor organization gaps: the full worked examples in "Core Refinement Types" duplicate material that also lives in references/refinement_patterns.md, and the "Additional Resources" section repeats links already given earlier. | 4 / 5 |
Total | 15 / 20 Passed |