Conciseness

The skill is efficient and respects Claude's intelligence throughout. It avoids explaining basic concepts and focuses on what's unique to lens authoring. There are minor areas that could be tightened—e.g., the 'six facts' section has some redundancy with later procedural steps, and phrases like 'whatever it looks like on the page' add color but not information—but overall it's well-trimmed.

Actionability

The skill provides concrete CLI commands, a clear 6-step procedure, and specific diagnostic guidance for tuning. However, the actual lens-writing guidance is deferred to references (lens-anatomy.md, validation.md) that are not provided in the bundle, and there are no inline code examples of lens SKILL.md content. The commands shown are executable and specific, but the core creative act—writing the lens itself—relies on external files we cannot verify.

Workflow Clarity

The 6-step procedure is clearly sequenced with explicit validation checkpoints: step 4 requires running on positive and negative cases, step 5 requires backtesting with quantitative comparison, and the skill explicitly states 'A lens that has not been run is a draft' as a gate. The tuning section includes a diagnostic-before-editing loop with category-driven fixes and re-backtesting. The feedback loops for destructive/batch-like operations (publishing a lens that runs on everyone's code) are well-handled.

Progressive Disclosure

The skill appropriately references external files (references/lens-anatomy.md, references/validation.md) at the right points in the workflow, and defers detailed content to them rather than inlining it. References are one level deep and clearly signaled. However, no bundle files were provided, so we cannot verify these references exist or are well-structured. The skill itself is well-organized with clear sections and a separate tuning section for a distinct use case.

Specificity

The description lists multiple specific concrete actions: settles the review question, sets the bar a finding must clear, drafts the lens, runs it against positive/negative test changes, backtests against existing review feedback, and packages it as a pinned reference. This is comprehensive coverage of the skill's capabilities.

Completeness

Clearly answers both 'what' (author review lenses, draft, test, backtest, package them) and 'when' (explicit 'Use when' clause with concrete trigger scenarios: catching missed issues, stopping false positives, writing/forking/tuning/debugging lenses). Also includes a helpful exclusion boundary ('Not for tessl review rubrics').

Trigger Term Quality

Includes strong natural trigger terms like 'code review', 'lens', 'review lens', 'catch something it misses', 'stop flagging', 'write', 'fork', 'tune', 'debug'. However, some terms are domain-specific ('Tessl Code Review', 'pinned reference') and it could benefit from more generic synonyms like 'review rule', 'review check', or 'review criteria' that users might naturally say.

Distinctiveness Conflict Risk

Highly distinctive with a clear niche: authoring review lenses specifically for Tessl Code Review. The explicit boundary statement distinguishing it from 'tessl review rubrics' further reduces conflict risk. The domain-specific terminology ('review lens', 'Tessl Code Review') makes it unlikely to be confused with other skills.