Conciseness

Efficient and operational throughout — assumes Claude knows what tCPA/tROAS are, spends no tokens on concept explanations, and keeps every section actionable. Not score 5 because the opening paragraph repeats the frontmatter boundaries ('does not allocate the budget... does not adjust pacing... does not score the account') and sibling skills are listed in both Reference Materials and Next Best Skill; not score 3 because these are minor redundancies, not unnecessary explanation.

Actionability

Fully actionable for an instruction-only skill: concrete selection rules ('revenue goal + adequate volume → tROAS; fixed-CPA goal + adequate volume → tCPA'), a concrete target-setting rule ('start at or slightly above the achievable CPA, not the aspirational one'), a labeling protocol (Measured / User-provided / Estimated), an exact save path template, and Quick Start example prompts covering the common cases. Per the rubric's code-vs-instruction note, absence of code is not penalized when guidance is this specific.

Workflow Clarity

Six clearly sequenced numbered steps with explicit validation checkpoints: a Decision Gate distinguishing 'Stop and ask' from 'Continue silently' conditions, a Done-when checklist with three verifiable criteria, and an error-recovery fallback ('mark it [needs export] and ask for the GA4/ecommerce conversion export rather than guessing'). Not a destructive/batch operation, so the validation cap does not apply.

Progressive Disclosure

The one bundle file (references/bid-strategy-matrix.md) is real, one level deep, and well-signaled with purpose ('strategy-selection thresholds, target-derivation formulas, portfolio grouping template, and learning-phase entry checklist') including a working anchor link (#portfolio-grouping, verified present). Not score 5 because several body links (../../../references/skill-contract.md, ../../../CONNECTORS.md, sibling SKILL.mds) point outside the bundle where their targets cannot be verified, slightly cluttering navigation.

Specificity

The description lists multiple concrete outputs — 'produces a bid-strategy choice (tCPA / tROAS / max-conversions / manual CPC), the starting target math, a portfolio grouping map, and a learning-phase entry plan' — with comprehensive coverage of what the skill delivers. Not score 4 because coverage is comprehensive rather than having minor gaps.

Completeness

Explicitly answers both: what ('produces a bid-strategy choice... portfolio grouping map, and a learning-phase entry plan') and when ('Use when the user asks to...'). Matches the anchor-5 example structure of concrete capabilities followed by explicit trigger phrases.

Trigger Term Quality

Leads with quoted natural user phrasings — '"pick a bid strategy"', '"set a tCPA/tROAS target"', '"plan the learning-phase entry"' — plus synonyms (tCPA/tROAS, learning-phase) that users would naturally say. Not score 4 because it includes the concrete natural phrasings and their variants rather than missing common ones.

Distinctiveness Conflict Risk

Clear niche (bid strategy selection and learning-phase entry planning) with explicit negative triggers routing to siblings: 'use budget-optimizer', 'use budget-pacing-monitor', 'use ad-account-auditor'. Minimal conflict risk — the anti-triggers actively disambiguate the closest overlapping skills.