Conciseness

The body avoids explaining concepts Claude already knows, but repeats the same facts across sections: the flat $0.025 cost and the 10–1,000,000 range each appear twice, and the Codex background-download/heartbeat guidance is restated in workflow step 7, the command-pattern comments, and two separate "Always Do This" bullets (lines 62 and 64). This matches anchor 3 — mostly efficient but with clear tightening opportunities — rather than anchor 2, since nothing is conceptual padding and each instance is operational.

Actionability

The command block is copy-paste ready with explicit placeholder-replacement instructions, concrete flag forms (--input @yaml://, --raw-output --transform id, --poll-interval-seconds 60), and covers the full common path: estimate-cost, start, download-results. It matches anchor 5 — fully executable commands covering the common cases — with the payload shape appropriately deferred to references/api.md, which contains a complete example.

Workflow Clarity

The 8-step sequence has explicit validation checkpoints for a costly batch operation: enforce the num_molecules range before estimate-cost, gate start on explicit cost confirmation, capture and re-use the job ID, plus error-recovery loops for missing auth (retry after boltz-cli-setup), sandbox blocks, and detached-download restart. This matches anchor 5 — clear sequence with explicit validation and feedback loops — and exceeds anchor 4, which allows minor validation gaps.

Progressive Disclosure

SKILL.md stays a ~78-line operational overview, and both referenced files (references/api.md, references/results.md) exist, are one level deep, self-contained, and clearly signaled at each point of use plus in a dedicated section ("Escape Hatch"). Payload and output-layout detail are correctly split out, matching anchor 5 for a bundled skill.

Specificity

"Design new small-molecule binders with Boltz" names the domain and one concrete action, but the description stops there — no mention of costing, submitting, downloading, or ranking, which the skill actually performs. It clearly matches anchor 3 (domain plus 1-2 concrete actions, not comprehensive), not anchor 4 which requires several specific actions listed.

Completeness

Both parts are explicit: the what ("Design new small-molecule binders with Boltz") and the when ("Use when generating novel ligands or hits for a target without a fixed compound library"), plus a negative boundary ("Not for screening existing molecules or one-off docking"). This matches anchor 5 — concrete trigger phrases answer both what and when; it is not anchor 4 since the when-clause is already fully explicit, not merely improvable.

Trigger Term Quality

Good natural-term coverage: "novel ligands", "hits", "binders", "screening", "docking" are phrases users would plausibly say. It misses common variations like "de novo design", "molecule generation", or "lead discovery", so it falls just short of anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The explicit negative boundary ("Not for screening existing molecules or one-off docking") sharply separates it from a likely sibling screening/docking skill, and the de novo generation niche is distinct. Minimal conflict risk — anchor 5.