fix(webview): show sane defaults for custom OpenAI-compatible models

[p12tic]

Related GitHub Issue

Closes: #1866.

Description

Custom model IDs for Fireworks, Baseten and SambaNova resolved to undefined model info in the webview, so the task header fell back to a context window of 1. Mirror the backend BaseOpenAiCompatibleProvider getModel(): honor the configured custom ID with openAiModelInfoSaneDefaults, use catalog metadata for known models, and fall back to the provider default only when no model is configured.

Test Procedure

Select custom model on fireworks.ai and check if it works.

Successful testing depends on #1846 and #1847, but this PR needs to land last.

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• [n/a] Visual Snapshot (UI changes only): If a user would notice this change at a glance (layout, theme tokens, brand elements, empty/error states), I've added or updated a *.visual.tsx snapshot in webview-ui/. See webview-ui/AGENTS.md → "When a UI change needs a snapshot".
• [n/a] Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• [n/a] Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Documentation Updates

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• webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts

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🔇 Additional comments (1)

webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts (1)

1581-1597: LGTM!

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📝 Summary

Summary by CodeRabbit

• Bug Fixes
  • Fireworks, Baseten, and SambaNova configurations now retain custom model IDs that aren’t listed in their static catalogs, using sensible default model settings when catalog details aren’t available.
  • Configured models listed in these providers’ catalogs now use their catalog details. When no model is configured, each provider’s default model is selected with its associated catalog information.

📝 Summary

📝 Summary

Walkthrough

Fireworks, Baseten, and SambaNova use a shared resolver for static-catalog model selection. The resolver selects provider defaults for unset or empty IDs, returns catalog metadata for listed IDs, and preserves unlisted IDs with OpenAI sane-default metadata.

Changes

Static-catalog model selection

Layer / File(s)	Summary
Resolve catalog model IDs webview-ui/src/components/ui/hooks/useSelectedModel.ts	A shared helper resolves unset or empty IDs to provider defaults, returns metadata for catalogued IDs, and retains unlisted configured IDs with copied OpenAI sane defaults.
Apply and test provider selection webview-ui/src/components/ui/hooks/useSelectedModel.ts, webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts	Baseten, SambaNova, and Fireworks use the helper. Tests cover omitted and empty IDs, catalog metadata, custom IDs, and inherited Object.prototype keys.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Low

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Merge Risk: ⚪ Minimal · up to cc470

Custom model IDs now receive sane metadata in the webview, preventing the context display from falling back to a window of 1 for ordinary unlisted IDs. No concrete merge-blocking regression was established.

Architecture Summary

Architecture risk: 🔵 Low · up to a079e

The change affects 1 system.

Changed systems: webview-ui

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — webview-ui (ui) was modified; 2 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in webview-ui/src/components/ui/hooks/tests/useSelectedModel.spec.ts: Added imports for the Fireworks, Baseten, and SambaNova default model IDs and static catalogs.
• observed — Modified behavior in webview-ui/src/components/ui/hooks/tests/useSelectedModel.spec.ts: Added Fireworks tests for default model selection when no ID is configured and metadata lookup for a known catalog ID.
• observed — Modified behavior in webview-ui/src/components/ui/hooks/tests/useSelectedModel.spec.ts: Added shared catalog cases and parameterized tests verifying that omitted or empty IDs select each provider’s default and metadata, and known IDs return their catalog metadata.
• observed — Modified behavior in webview-ui/src/components/ui/hooks/tests/useSelectedModel.spec.ts: Added tests verifying that an unlisted custom ID is retained for each provider and receives openAiModelInfoSaneDefaults metadata with a context window greater than 1.

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Pre-merge checks | 8

✅ Passed checks (8 passed)

Check name	Status	Explanation
Linked Issues check		Issue #1866 requires correct context usage for custom OpenAI-compatible model IDs. The changed getStaticCatalogModel preserves configured IDs that are absent from the Fireworks, Baseten, and SambaNo…
Out of Scope Changes check		The source change is limited to model resolution for the three providers named in the issue. The added tests verify the same resolution behavior and prevent prototype-key regressions. No unrelated cha…
Regression Evidence		The changed getStaticCatalogModel behavior has focused lowest-layer coverage in useSelectedModel.spec.ts. Tests cover no configured ID, empty ID, known catalog IDs, custom unlisted IDs, and inheri…
Security Boundaries		No changed path introduces a security-boundary failure. getStaticCatalogModel in webview-ui/src/components/ui/hooks/useSelectedModel.ts:69-82 returns the configured model ID and static metadata on…
Persistence Integrity		No changed persistence path exists. The PR changes only useSelectedModel.ts and its tests. getStaticCatalogModel performs synchronous in-memory selection and returns the configured/default model a…
Lifecycle Resource Cleanup		No changed lifecycle path can leak a resource or duplicate work. The PR adds the synchronous getStaticCatalogModel helper and replaces three static catalog branches with calls at `useSelectedModel.t…
Title check		The title clearly describes the main change: showing sane defaults for custom OpenAI-compatible models in the webview.
Description check		The description includes the linked issue, implementation summary, test procedure, and checklist. The test procedure is brief and does not report a completed test result, but the description is otherw…

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✅ All modified and coverable lines are covered by tests.

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Actionable comments posted: 4

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at
@webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts:
- Around line 1403-1417: Add an empty-string boundary case to the
useSelectedModel test coverage for Fireworks, Baseten, and SambaNova. Pass
apiModelId as an empty string and assert that the result uses the provider’s
default model ID and catalog metadata.

Review comments at @webview-ui/src/components/ui/hooks/useSelectedModel.ts:
- Around line 71-73: Update the selected-model lookup that uses configuredId and
defaultModelId to fall back to defaultModelId when configuredId is empty, rather
than preserving the empty string; return metadata from models using the resolved
id.
- Around line 408-409: Add tests for Baseten and SambaNova alongside the
existing Fireworks catalog tests: verify each provider selects its expected
default model and resolves a known model from its catalog. Keep the existing
custom-ID fallback coverage intact and reference the Baseten and SambaNova
model-selection paths in useSelectedModel.
- Around line 71-75: Update the configuredId membership check in the
useSelectedModel resolver to use an own-property check on models, so inherited
names such as "toString" return openAiModelInfoSaneDefaults instead of an
inherited property.

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• webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts
• webview-ui/src/components/ui/hooks/useSelectedModel.ts

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Require regression coverage at the lowest valid harness with behavior-focused assertions, including relevant negative, error, false/unset, and boundary cases.

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• webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts

Check strict typing and exhaustive behavior across normal, boundary, error, cancellation, retry, and compatibility paths.

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Files:

• webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts
• webview-ui/src/components/ui/hooks/useSelectedModel.ts

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• webview-ui/src/components/ui/hooks/useSelectedModel.ts

🪛 GitHub Check: mutation-diff

webview-ui/src/components/ui/hooks/useSelectedModel.ts

[warning] 408-408: Mutation test advisory
webview-ui/src/components/ui/hooks/useSelectedModel.ts:408: Survived ConditionalExpression mutant (replacement: case providerIdentifiers.sambanova:). See the job summary for the complete list and resolution guidance.

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Pre-merge checks failed. Please resolve the failing checks before merging.

[p12tic]

@coderabbitai retry review

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@p12tic, I’ll retry the review of #1848.

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[p12tic]

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[edelauna]

Thanks for iterating on this!