hooks: Gemini CLI hook registration not documented or validated

[sharkich]

Hooks adapter QA (2026-05-19) could not validate Gemini CLI — no hook registration schema in repo. Note: Gemini CLI does not appear in CONTEXT.md:107 but may be in scope. AC: (a) confirm scope, (b) if yes — add adapter + hooks.json schema.

[github-actions]

Rosetta Triage

Classification: enhancement + documentation
Priority assessment: Medium — scope is not yet confirmed (Gemini CLI is not listed in CONTEXT.md), but if in scope this is a clear gap: no hook registration schema exists in the repo and QA cannot validate the adapter. The acceptance criteria are well-defined: (a) confirm Gemini CLI is in scope, (b) add adapter + hooks.json schema.

Scope confirmation needed:

• Is Gemini CLI officially in scope for Rosetta hook adapter support?
• If yes, should hooks.json schema be added alongside the Claude Code and other existing adapter schemas?

Once scope is confirmed, the work is actionable: add the Gemini CLI hooks adapter registration and document the hooks.json schema in the repo.

Automated triage by Rosetta agent