The body is dense and operational — error-code triage, capability table, key-concepts, prerequisites, common mistakes — with almost no explanation of concepts Claude already knows; the example blocks are load-bearing for the routing pattern rather than padding.

Provides fully executable guidance: exact bash commands (auth0 tenants list, aws sts get-caller-identity, az account show), an MCP add command, specific API verbs, a concrete backoff sequence (5s/10s/20s/30s/60s), and exact valid header values.

Capability routing is clearly sequenced with explicit validation checkpoints — tenant check before the first CLI command, required confirmation for mutating create/PATCH/delete calls, and a 'CHECK THIS FIRST' error-code triage loop that acts as a diagnostic feedback loop.

SKILL.md acts as a lobby with a concise overview and one-level-deep references to per-capability files, a providers router, and api/advanced/examples; all cited paths resolve to real files and navigation is clearly signaled with inline anchor links and a References section.

Lists multiple concrete actions tied to a named domain — 'setting up, verifying, or troubleshooting', 'CNAME setup, verification, TLS policy, Multiple Custom Domains, and Management API errors' — matching the multiple-specific-actions anchor.

Explicitly answers what ('Covers CNAME setup, verification, TLS policy, Multiple Custom Domains, and Management API errors') and when ('Use when setting up, verifying, or troubleshooting... even if the user just says...'), with an explicit 'Use when' clause.

Captures natural user phrasing ('use my own domain for Auth0 login', 'login.example.com') alongside setup/verify/troubleshoot triggers, giving good coverage of terms users would actually say.

The niche is tightly scoped to custom Auth0 login domains with Auth0-specific terms (CNAME, MCD, Management API), making it unlikely to trigger for unrelated skills.