Conciseness

Phrases like "Each agent starts blind" and "An agent's summary is what it intended, not what it did — read what it produced" carry maximal guidance per token; nothing explains concepts Claude already knows. Matches anchor 5 (lean, every token earns its place) with nothing trimmable.

Actionability

Instruction-only skill with fully concrete directives: exact prompt contents ("the piece's goal, the constraints, why it matters, and what is out of scope"), dispatch batching ("Independent pieces dispatch together, in one message"), exact reporting vocabulary ("verified and settled" / "unverified and open"), and enumerated stop conditions. Fully executable guidance covering the common cases, matching anchor 5.

Workflow Clarity

The numbered loop has a clear sequence and an explicit validation checkpoint ("Nothing reaches the user unverified", plus the merged-tree check) with a defined end condition. Not 5 because the recovery path when a return fails verification is never stated — whether to redispatch or fix is left implicit, and per guidelines only what is written is scored.

Progressive Disclosure

At ~15 lines with no external references needed, the skill qualifies for the simple-skill exception: well-organized sections (stance bullets, numbered loop, reporting spec, edge cases) with a single clearly signaled one-level-deep pointer ("use **target** skill"). Easy to navigate, nothing that belongs in a separate file.

Specificity

Names three concrete actions — "Spawn agents and verify their output — route work, never do it" — matching anchor 4 (several specific actions, minor gaps). Not 5 because coverage isn't comprehensive (no mention of dispatch composition, merging, or escalation); not 3 because it goes beyond 1-2 actions.

Completeness

Explicitly answers both: what ("Spawn agents and verify their output — route work, never do it") and when ("Use when the work splits into pieces agents can carry..."). Not 5 because the when-clause "the session should route and check, not execute" partly restates the skill rather than giving fully concrete external triggers.

Trigger Term Quality

Includes natural orchestration terms — "spawn", "agents", "route", "verify", "work splits into pieces" — giving good keyword coverage per anchor 4. Not 5 because common variations users say ("delegate", "parallelize", "subagents", "fan out", "orchestrate") are missing.

Distinctiveness Conflict Risk

"Route work, never do it" carves a clear niche, but the trigger condition could overlap with closely related agent-orchestration and workflow skills, matching anchor 4 (mostly distinct, minor overlap risk).