Extremely verbose at ~400+ lines. Extensively explains concepts Claude already understands (what actors are, what use case levels mean, what includes/extends relationships are). The agent invocation guide largely duplicates the workflow steps. The error handling section is exhaustive to the point of over-engineering, covering edge cases that Claude could handle with general reasoning. Many sections could be cut by 50-70% without losing actionable information.

The workflow steps are reasonably concrete with specific agent names, file paths, and template references. However, there is no executable code — it's all procedural prose. The agent invocation instructions are specific but rely on external templates and references that aren't provided in the bundle, making it hard to verify completeness. The skill is instruction-only, so lack of code isn't penalized, but some steps remain vague (e.g., 'perform an initial extraction' without specifying the exact output format).

The 8-step workflow is clearly sequenced with explicit validation checkpoints (convergence check in Step 6b with specific criteria, user review in Step 7, resume detection in Step 1). Feedback loops are well-defined: review → conflict resolution → revision → convergence check → possible second round with a hard cap at 2 rounds. Error recovery paths are thorough.

The skill references external templates (use-case-template.md, use-case-index-template.md, expert-review-template.md, review-protocol.md, ensure-config.md) which suggests good structural intent, but no bundle files were provided to verify these exist. The SKILL.md itself is monolithic — the agent invocation guide and error handling sections are large inline blocks that could be separate reference files. The content would benefit from splitting the detailed error handling and agent dispatch table into referenced files.

The description names the domain (use case documents, Cockburn fully-dressed format) and mentions some outputs (use-cases/ directory, individual files, README index), but the concrete actions are limited — it mostly describes what it produces rather than listing multiple distinct actions like 'analyze actor goals, define preconditions, map success/failure scenarios'.

The description explicitly answers both 'what' (creates structured use case documents describing application behavior from actor perspectives, producing a use-cases/ directory with Cockburn fully-dressed use case files and a README index) and 'when' (with an explicit list of trigger phrases and conditions). The 'Use when' guidance is embedded via 'This skill should be used when...'.

The description includes an extensive list of natural trigger phrases users would say: 'use cases', 'write use cases', 'define use cases', 'Cockburn use cases', 'actor goals', 'behavioral requirements', 'system behavior', 'what does the app do', 'describe the behavior', 'use case document', etc. This provides excellent coverage of natural language variations.

The description is highly distinctive with its focus on Cockburn fully-dressed use cases, actor perspectives, and the specific output structure (use-cases/ directory with README index). This is a clear niche that is unlikely to conflict with other documentation or requirements skills.