Conciseness

The body is lean and dense, assuming competence ('Incomplete or rejected comparisons are **not compared**, not "no changes."', 'Checkpoint transitions establish changes between probes, not the exact introduction version') with zero beginner padding; every sentence carries tool-specific information, matching the anchor-5 example's economy.

Actionability

Every section leads with copy-paste-ready commands using real flags and version ranges ('dnx dotnet-inspect -y -- diff --package System.Text.Json@9.0.0..10.0.0 --breaking', '--finding analysis.allocation --at first --at last'), covering the common cases of diffing, member tracking, analysis shifts, history, and boundary confirmation — fully executable.

Workflow Clarity

Task sections are clearly sequenced with explicit validation checkpoints ('Read completion, diagnostics and exit status', 'Confirm a candidate adjacent boundary with the native Finding comparison', 'walk backward from the bad version to a successful absence'), but there is no explicit error-recovery feedback loop (e.g., what to do after a rejected comparison), keeping it below anchor 5.

Progressive Disclosure

Five well-headed task sections with consistent structure and pointers to companion skills ('Load `skill decompiler` or `skill sourcelink`'), and no bundle files exist to reference; however, at ~100 inline lines, detail such as history flag semantics, the Finding outcome taxonomy, and '--at' grammar could be split into a reference file — good structure with minor organization gaps rather than the clean overview-plus-references split of anchor 5.

Specificity

Names the domain ('Compare .NET library versions') and several concrete actions ('API breaks, implementation changes and static analysis shifts', 'follow exact API correspondence and history'), but omits capabilities covered in the body such as version discovery and boundary location — minor gaps in coverage matching anchor 4 rather than comprehensive anchor 5.

Completeness

The 'what' is clear and concrete, but there is no 'Use when...' clause or equivalent trigger guidance; the trailing clause ('without treating comparisons as safe-upgrade verdicts') is behavioral guidance, not a 'when'. Per the rubric guideline, a missing explicit trigger caps completeness at 3.

Trigger Term Quality

'.NET library versions' and 'API breaks' are relevant natural terms, but common user phrasings like 'NuGet', 'packages', 'breaking changes', 'upgrade', and 'compatibility' are absent — more than 'a few natural terms missing', so it sits at anchor 3 rather than 4.

Distinctiveness Conflict Risk

The niche is narrow and distinct — .NET library version comparison with API correspondence semantics — with minimal realistic overlap against other skills, matching anchor 5 ('clear niche with distinct triggers; minimal conflict risk').