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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🔇 Additional comments (1)

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

75-75: The previously reported own-property defect remains.

Line 75 still uses in, which accepts inherited properties. (developer.mozilla.org) With apiModelId: "toString", the supplied catalogs return a function as info instead of fallback metadata. Use Object.prototype.hasOwnProperty.call(models, configuredId) and add a regression case.

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📝 Summary

Summary by CodeRabbit

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

Walkthrough

Fireworks, Baseten, and SambaNova use a shared resolver for static-catalog model selection. Unlisted configured IDs are retained with copied OpenAI sane defaults as model information.

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 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, and custom IDs with fallback model information.

Priority: ➖ Normal

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

Change: Bug fix · Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to a079e

The change fixes metadata for custom models while preserving default and known-model selection. No actionable new merge-blocking risk was established; merge after normal checks pass.

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.

🚥 Pre-merge checks | ✅ 8

✅ Passed checks (8 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Issue #1866 requires proper context usage values for custom OpenAI-compatible model IDs in the webview. getStaticCatalogModel preserves configured uncatalogued IDs for Fireworks, Baseten, and SambaN…
Out of Scope Changes check	✅ Passed	The changed helper and tests are limited to static-catalog model resolution for Fireworks, Baseten, and SambaNova. These changes directly support issue #1866. No unrelated change is demonstrated.
Regression Evidence	✅ Passed	PASS. The hook change has focused Vitest coverage at the lowest valid layer. Tests cover all three affected providers, unset and empty IDs, known catalog IDs, and unlisted custom IDs. The custom-ID as…
Security Boundaries	✅ Passed	No changed security-boundary violation is present. getStaticCatalogModel only selects catalog metadata or copies openAiModelInfoSaneDefaults; it does not execute the configured model ID, access se…
Persistence Integrity	✅ Passed	The PR changes only useSelectedModel.ts and its tests. The changed helper is a synchronous resolver. It performs no storage write, async operation, rollback, or partial-failure handling. For an unse…
Lifecycle Resource Cleanup	✅ Passed	No changed lifecycle path exists. The PR adds the pure getStaticCatalogModel resolver and replaces three provider switch cases with direct calls. The changed implementation creates no listener, watc…
Title check	✅ Passed	The title clearly and concisely describes the main change: showing sane defaults for custom OpenAI-compatible models.
Description check	✅ Passed	The description includes the linked issue, implementation summary, test procedure, checklist, and documentation impact. The test procedure is brief and does not describe the added unit tests, but the …

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Actionable comments posted: 4

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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/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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