Conciseness

Roughly 40 lean lines with zero padding: no explanation of concepts Claude already knows, dense operational settings ("Phase mask: 0 → ... → 4 → 5 → 6"), and a compact one-line example. Every token earns its place.

Actionability

As an instruction-only orchestration skill, the guidance is specific: named delegate skills ("orch-pipeline", "code-explorer", "build-error-resolver", "/build-fix", "security-reviewer"), a defined first move ("reproduce the bug as a new failing test"), and a concrete example. Falls short of 5 because the phase-mask notation and gate semantics are only fully executable by reading the linked engine skill, and there is no copy-paste-ready invocation.

Workflow Clarity

A clear sequence is present (scope root cause → red test → fix to green → review → gated commit) with the red-to-green test acting as an explicit feedback loop and named checkpoints ("Stop at Gate 1 ... and Gate 2 (pre-commit)"). Anchor 5 requires full explicit validation steps and error-recovery loops, but the recovery paths ("escalate build breaks to build-error-resolver") are only partially specified, placing it between anchors 4 and 5, closer to 4.

Progressive Disclosure

Under 50 lines with no bundle files and well-organized sections (When to Use, Operation settings, How It Works, Example); per the rubric's simple-skill note this qualifies for a 5. The single reference to the shared engine ([orch-pipeline](../orch-pipeline/SKILL.md)) is clearly signaled and one level deep.

Specificity

Lists multiple concrete actions — "reproduce it as a failing regression test, fix to green, review, and gated commit" — plus a concrete mechanism ("delegating each phase to the matching ECC agent"), covering the full fix workflow comprehensively.

Completeness

Explicitly answers what ("Orchestrate fixing a bug — reproduce it as a failing regression test, fix to green, review, and gated commit...") and when ("Use when existing behavior is broken or wrong") with a concrete trigger phrase, matching the anchor-5 example structure.

Trigger Term Quality

Natural terms "fixing a bug", "broken", "wrong", "existing behavior" are phrased as users would say them, but common synonyms like "error", "crash", "regression", or "not working" are missing. Anchor 5 requires comprehensive synonym coverage; anchor 4 (good coverage, a few natural terms missing) is the closest fit.

Distinctiveness Conflict Risk

The niche is clear — fixing broken behavior, distinct from adding or changing features — and the ECC-agent framing is distinctive. However, the description itself does not distinguish fix-defect from sibling orchestration skills (that disambiguation lives only in the body), leaving minor overlap risk with any generic bug-fixing skill; that places it just below anchor 5.