Ship a Godot UI design skill with verified runtime installation #127

Parent feature

Durable Godot UI design and native validation workflow. User authorized creation, installation and load verification in the current session. Related design example: private project details stay outside this public repository.

Done when

• A focused godot-ui skill composes existing UI principles with native scene mapping, component/layout contracts, state fixtures and rendered evidence.
• The Godot skill composes available general UI skills without copying their principles or requiring another package.
• Codex and Claude installations retain implicit invocation; the project UI route explicitly requires the skill.
• A small installer/check command exposes the bundled Godot skill from its canonical devkit source, preserves unrelated installed skills, and detects missing/broken/conflicting installs.
• Installed skill metadata is visible through the actual local Codex skill loader; a fresh implicit-invocation behavioral check selects it for a relevant request and leaves unrelated work alone.
• Local Claude can read the same bundled skill. No claim of automatic propagation to already-running sessions or older pinned installations.

Plan

• Inspect current discovery and routing.
• Author the Godot-specific skill and update routing.
• Add bounded installer/check behavior and meaningful tests.
• Validate and forward-test skill behavior.
• Merge green CI, install locally and verify actual discovery. CLI remains stdlib-only; installers do not boot Godot.

Files

src/godot_devkit/godot/installables/skills/godot-ui/SKILL.md; skill installer and CLI route; installer/packaging tests; narrowly scoped docs ratchet allowance; README installation pointer. The general UI skills remain in agentic-sdlc, with no cross-package runtime dependency.

Proof

sh tests/run.sh; Codex skills/list discovery; independent realistic forward-test; local installer check with idempotence and conflict cases. Skill frontmatter validation.

Tier

Lead: gpt-6-sol medium for cross-runtime loading contract and UI workflow judgment. Bounded independent checks may use gpt-6-luna high. No application UI or devkit runner rewrite in this change.