Generally efficient with good use of tables and structured formatting, but some sections like the ecosystem detection table and common resolution patterns could be tighter. The output template includes template variables and conditional blocks that add bulk but serve a purpose.

Provides concrete, specific guidance throughout: exact MCP tool invocations with parameters, specific file paths to check (~/.endorctl/config.yaml), specific env var names, exact commands (rm -rf ~/.endorctl), links to relevant docs, and clear resolution patterns per category. The diagnosis output template is copy-paste ready.

Clear 5-step sequential workflow (detect ecosystem → classify → match patterns → present diagnosis → handle multiple errors) with explicit priority ordering for multiple errors, a feedback loop via re-scan after fix, and an error handling table covering edge cases. The auth conflict resolution provides a clear decision tree.

References external files (references/error-knowledge-base.md, references/data-sources.md) and other skills (/endor-setup, /endor-scan) appropriately, but no bundle files were provided to verify these exist. The main SKILL.md contains a good amount of inline content that could potentially be split out (e.g., the full ecosystem detection table, common resolution patterns), though it's not egregiously long.

Lists concrete actions: troubleshoot scan errors, match errors against known patterns, and specifies supported ecosystems (NPM, Maven, PyPI, Go, Cargo, NuGet, RubyGems, Packagist). Also explicitly states what it does NOT handle.

Clearly answers both 'what' (troubleshoot Endor Labs scan errors, match against known patterns across multiple ecosystems) and 'when' (explicit 'Use when...' clause with specific trigger phrases). Also includes negative boundaries for disambiguation.

Excellent coverage of natural trigger terms: 'scan failed', 'why did the scan fail', 'endor troubleshoot', 'fix scan error', 'diagnose error', and 'pastes an error message from a failed scan' — these are phrases users would naturally say.

Highly distinctive with explicit negative boundaries ('Do NOT use for setup issues (/endor-setup) or general scanning (/endor-scan)'), clearly carving out its niche from related Endor Labs skills and minimizing conflict risk.