The body is mostly efficient code, but the endpoint mappings are duplicated between the Step 1 audit ENDPOINT_MAP and the Step 2 MIGRATION_RULES, and the 'Current State' `npm list axios` block adds little, so it could be tightened rather than earning the lean score-3 anchor.

Every step ships complete, executable TypeScript (audit script, regex find/replace rules, feature-flag module, shadow-test function) and bash cleanup commands that are copy-paste ready, matching the fully-executable score-3 anchor.

A clear five-step sequence (audit, migration map, feature flag, shadow comparison, cleanup) is anchored by explicit validation checkpoints in Steps 4 and 5 plus an error-handling table with recovery guidance, meeting the score-3 bar rather than the implicit-checkpoint score-2 bar.

A 341-line references/implementation-guide.md bundle exists but is never linked from the body, while the body inlines implementation code that overlaps that reference, fitting the score-2 anchor of content that should be separate kept inline with an unsignaled reference rather than the well-signaled score-3 pattern.

Names the Apollo.io API domain plus multiple concrete actions ('upgrading Apollo API versions, migrating to new endpoints, or updating deprecated API usage'), matching the multiple-specific-actions anchor rather than the single-action score-2 example.

Explicitly states what it does ('Manage Apollo.io API upgrades and endpoint migrations') and when to use it ('Use when upgrading...') with explicit trigger phrases, satisfying both halves required for score 3.

Lists five natural phrases a user would actually say ('apollo upgrade', 'apollo migration', 'update apollo api', 'apollo breaking changes', 'apollo deprecation'), giving good coverage rather than the partial coverage at score 2.

Tightly scoped to the Apollo.io API niche with distinct, product-specific triggers and third-person imperative voice, making conflict with other skills unlikely.