Conciseness

The body is dense and assumes Compose competence — no tutorial padding, and the bulk of tokens are complete, usable code. Minor over-explanation remains: the pointer to references/compose-flags.md is repeated in Steps 2, 5, and 6, and Step 6 restates basics Claude knows ("down stops and removes containers and networks"), fitting "efficient; minor instances of over-explanation that could be trimmed" rather than level 5's every-token-earns-its-place.

Actionability

Fully executable, copy-paste-ready throughout: a complete compose.test.yaml with healthchecks and depends_on conditions, a full GitHub Actions workflow with matrix-sharded project names, both CI shapes as concrete bash with exit-code propagation, a migrations service example, and a profile example. Specific examples cover the common cases, matching the level-5 anchor.

Workflow Clarity

A clear 7-step sequence with explicit validation checkpoints at every stage: healthcheck gating (service_healthy), the db-healthy → migrate-exits-0 → app-starts chain via service_completed_successfully, --wait/--wait-timeout readiness gating with a bounded budget, exit-code propagation as the build verdict, and error-resilient teardown (if: always() / trap-on-EXIT). The one destructive operation (volume removal) is deliberately gated and always cleaned up, and failure modes are cataloged in the referenced anti-patterns file.

Progressive Disclosure

Verified against the actual bundle: two real reference files (compose-flags.md, anti-patterns.md), both one level deep, clearly signaled at the point of need ("The three depends_on conditions are tabulated in references/compose-flags.md") plus a closing References section, while the workflow itself stays inline in the main file. Matches "clear overview with well-signaled one-level-deep references; content appropriately split; easy navigation".

Specificity

The description lists multiple concrete actions — "Writes a compose.test.yaml with healthcheck-ordered startup, per-job project names for parallel CI, --wait and --exit-code-from gating, and clean teardown with volumes removed" — naming actual flags and covering the skill's core operations comprehensively. It exceeds the level-4 anchor ("minor gaps in coverage") because the actions named map to every major step of the skill.

Completeness

Both questions are answered explicitly: "Use when tests need the app plus several real services (database, cache, queue) started together" is a concrete trigger clause, and the what is a specific multi-part capability list. Not level 4, because the when-clause is explicit and specific rather than vague.

Trigger Term Quality

Good natural keyword coverage: "tests", "app plus several real services", "database, cache, queue", "parallel CI", "teardown". However the phrases a user would most naturally say — "docker compose", "Compose", "integration tests" — never appear as trigger words ("compose" surfaces only inside the filename "compose.test.yaml"), matching "good keyword coverage; a few natural terms missing" rather than the comprehensive synonym coverage of level 5.

Distinctiveness Conflict Risk

The niche (multi-service Compose orchestration for test stacks, with specific gating flags) is mostly distinct, but the trigger phrasing "app plus several real services ... started together" could also fire for a testcontainers-style or general CI-setup skill — the body itself names testcontainers as the neighboring alternative. Minor overlap risk with closely related skills, matching level 4; level 5's "minimal conflict risk" is not fully earned.