Resolved. See:

- [`../reports/2026-05-11-17-skill-activation-mechanics.md`](../reports/2026-05-11-17-skill-activation-mechanics.md) — primary findings on Claude Code skill activation.
- [`../reports/2026-05-11-17-skill-activation-mechanics-verification.md`](../reports/2026-05-11-17-skill-activation-mechanics-verification.md) — independent citation-by-citation verification.
- [`../reports/2026-05-11-17-skill-engines-cross-tool.md`](../reports/2026-05-11-17-skill-engines-cross-tool.md) — comparative survey across Codex, Gemini CLI, Cursor, Windsurf, Aider, Continue, plus the non-`paths` Claude mechanisms (hooks, `` !`cmd` ``, `@imports`, `skillOverrides`, etc.).