Conciseness

The bulk is lean, repo-specific code and constraints Claude cannot infer, but there is notable redundancy: two separate wandConfig sections ("WandConfig Pattern" and "WandConfig for Complex Inputs"), canonicalParamId "Critical constraints" stated twice in near-identical wording, createVersionedToolSelector demonstrated twice, a Complete Example that largely restates the Block Configuration Structure skeleton, and an "You are an expert…" persona line. This fits anchor 3 (mostly efficient, could be tightened) — the redundancy exceeds the 'minor instances' of anchor 4 but is far from the padded over-explanation of anchor 2.

Actionability

Fully executable guidance throughout: complete TypeScript skeletons for every subBlock type with imports, concrete tools.config transform patterns, a registry snippet, an exact icon-request script, and a near-copy-paste Complete Example covering the common case. Matches anchor 5 — the {service} placeholders are justified templates, not pseudocode, so it does not fall to anchor 4.

Workflow Clarity

A clear sequence exists (create file → configure subBlocks → wire tools → register → checklist), and the "Final Validation (Required)" section is an explicit verification checkpoint ("Read every tool definition that appears in tools.access — do not skip any", verify param mappings, outputs, conditions) backed by a 14-item checklist. It falls short of anchor 5 only because there is no error-recovery feedback loop (no 'if validation finds a mismatch, fix the wiring and re-verify' path), placing it at anchor 4 with a minor validation gap.

Progressive Disclosure

No bundle files exist (no references/, scripts/, or assets/); all ~826 lines live inline in SKILL.md. Section headers are clear and well-ordered, but substantial reference material (SubBlock Types Reference, Condition/DependsOn syntax, V2 patterns) clearly belongs in separate files. This matches anchor 3 (some structure, but content that should be separate is inline) — better organized than anchor 2, but an 826-line skill with zero reference files cannot reach anchor 4's 'most content is appropriately placed'.

Specificity

"Create or update a Sim integration block with correct subBlocks, conditions, dependsOn, modes, canonicalParamId usage, outputs, and tool wiring" enumerates multiple concrete actions (create, update, align) with comprehensive, gap-free coverage of the block-config domain — no vague language anywhere. It clearly matches the score-5 anchor rather than 4, which would require minor gaps in coverage; no core block-configuration area is absent.

Completeness

Explicitly answers both: what ("Create or update a Sim integration block with correct subBlocks, conditions, dependsOn, modes, canonicalParamId usage, outputs, and tool wiring") and when ("Use when working on `apps/sim/blocks/blocks/{service}.ts` or aligning a block with its tools") with two concrete trigger phrases. This matches anchor 5; it is above anchor 4 because the 'when' clause is explicit and concrete rather than merely present.

Trigger Term Quality

Natural terms a user would say are present: "block", "Sim integration block", "tools", and the concrete file path "apps/sim/blocks/blocks/{service}.ts". Common variations are missing (e.g., "add a block", "new integration", service-specific phrasing), so it fits anchor 4 (good coverage, a few natural terms missing) rather than 5's synonym-level coverage; it exceeds anchor 3 because the core natural domain terms are all present.

Distinctiveness Conflict Risk

The description targets a clear niche — Sim's block system, anchored by the exact file path `apps/sim/blocks/blocks/{service}.ts` — making it highly distinguishable from other skills with minimal conflict risk. Clean match to the score-5 anchor.