Conciseness

The ~30-line body is lean: every line is a command, output contract, or workflow rule ('Exit code 0 = pass. Non-zero prints diagnostics; fix every one before setting bom_ready: true.'). There is no explanation of concepts Claude already knows, matching the 'every token earns its place' anchor.

Actionability

Commands are copy-paste executable with real example queries ('parts_search.py "ESP32-S3-WROOM-1" --limit 5', '"100nF 0402" --limit 5 --full'), output fields are documented ('lcsc (C-number), mfr, package, stock, price, description'), and the validation invocation plus exit-code semantics are fully specified. This matches the fully-executable anchor.

Workflow Clarity

The 7-step workflow is clearly sequenced with an explicit validation gate and feedback loop: run bom_validate.py, 'fix every one' diagnostic before setting the gate, and 'Set bom_ready: true only when it passes and no design-critical item is unresolved'. Unresolved rows are explicitly kept visible under unresolved_items rather than hidden. This matches the score-5 anchor with explicit validation and error-recovery guidance.

Progressive Disclosure

Good structure overall: the body stays an overview, the row contract is correctly split into references/hardware-bom-schema.md (a real bundle file), and both scripts are real and referenced. However, workflow step 1 crams pointers to external vendored originals ('<repo>/reference/replicator-original/ee/bom-finalizer/references/' and '.../ee/component-selection/SKILL.md') — files outside the skill's own bundle — into one dense sentence, which is a minor navigation and organization gap fitting the score-4 anchor rather than the clean one-level-deep score-5 anchor.

Specificity

The description lists multiple concrete actions covering the skill's full scope: 'Select electronic components and build a procurement-ready BOM with real LCSC/JLC supplier evidence (stock, price, datasheet)' plus the provided tooling ('Provides parts_search.py (jlcsearch API) and bom_validate.py (schema gate)'). It matches the comprehensive-coverage anchor rather than the score-4 anchor, whose 'minor gaps' it lacks — selection, BOM construction, evidence gathering, search, and validation are all named.

Completeness

Both halves are explicit: the what ('Select electronic components and build a procurement-ready BOM with real LCSC/JLC supplier evidence...') and the when ('Use after the PRD stage and before PCB design') — a concrete, stage-based trigger clause. It clearly matches the score-5 anchor with concrete trigger phrasing rather than score 4, where the 'when' would be less specific.

Trigger Term Quality

Good natural-keyword coverage: 'electronic components', 'BOM', 'LCSC', 'JLC', 'stock', 'price', 'datasheet' are terms a hardware-focused user would actually say. A few natural variants are missing (e.g. 'bill of materials' spelled out, 'parts selection', 'schematic'), which fits the score-4 anchor ('good keyword coverage; a few natural terms missing') rather than the comprehensive synonym coverage of score 5.

Distinctiveness Conflict Risk

It occupies a clear niche — LCSC/JLC supplier evidence and procurement-ready BOM gating — with vocabulary (BOM, LCSC, datasheet, PRD-to-PCB pipeline position) that no generic skill would share. Conflict risk is minimal, matching the score-5 anchor.