Indicate when the model list is empty

[chrarnoldus]

Summary

• Track whether any models are available when model lookup fails
• Include an explicit empty-model-list indication in CLI and session errors
• Add focused formatter coverage and a patch changeset

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (5 files)

• .changeset/clear-empty-models.md
• packages/opencode/src/cli/error.ts
• packages/opencode/src/provider/provider.ts
• packages/opencode/src/session/prompt.ts
• packages/opencode/test/kilocode/cli/error.test.ts

lgtm — the incremental commit correctly scopes the empty-model check to the specific provider rather than checking all providers globally, and sets modelsEmpty: false for the "provider not found" branch where model availability is indeterminate.

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_{Reviewed by claude-4.6-sonnet-20260217 · 172,499 tokens}

_{Review guidance: REVIEW.md from base branch main}