fix: update openai sane-default parameter values for custom models by p12tic · Pull Request #1847 · Zoo-Code-Org/Zoo-Code

p12tic · 2026-09-28T23:11:22Z

Related GitHub Issue

Closes: #1845

Description

Custom models use sane-default metadata with maxTokens: -1 (unlimited), which Fireworks rejects with '400 max_tokens must be non-negative'.

Test Procedure

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

Depends on #1846 (this PR only needs last commit).

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

coderabbitai · 2026-09-28T23:11:30Z

Navigate logical layers of code changes, visualize relationships, and explore their blast radius.

📝 Summary

Summary by CodeRabbit

New Features
- Custom model IDs are now retained for compatible providers, including when they aren’t listed in the selected provider catalog.
Bug Fixes
- Providers now use known model details when available and sensible defaults for unlisted models. When no model is configured, the provider’s default model is selected.
- Default model settings no longer assume image support or a maximum output-token limit. Requests for custom models omit the maximum-token setting when it isn’t specified.

Walkthrough

The provider model lookup and Z.AI selection hook now retain configured model IDs that are absent from predefined catalogs. Sane default model metadata no longer sets maxTokens and now sets supportsImages to false. Tests cover custom model lookup and request parameters.

Changes

Provider model handling

Layer / File(s)	Summary
Sane default model metadata `packages/types/src/providers/openai.ts`, `src/api/providers/__tests__/lmstudio.spec.ts`, `src/api/providers/__tests__/openai.spec.ts`	Sane defaults omit `maxTokens` and set `supportsImages` to false. LM Studio and OpenAI tests expect these values.
Provider custom model resolution `src/api/providers/base-openai-compatible-provider.ts`, `src/api/providers/__tests__/base-openai-compatible-provider.spec.ts`, `src/api/providers/__tests__/fireworks.spec.ts`	The base provider uses predefined metadata for known configured IDs and sane defaults for unknown IDs. Tests cover retaining custom IDs and assert request token parameters for custom and known Fireworks models.
Z.AI custom model selection `webview-ui/src/components/ui/hooks/useSelectedModel.ts`, `webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts`	The selection hook retains configured IDs missing from the selected API line’s catalog and uses sane defaults when metadata is unavailable. Tests cover custom IDs and default selection.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: hannesrudolph

Merge Risk: 🟡 Moderate · up to 0b88e

Custom model IDs and token-limit omission are preserved, but vision-capable OpenAI-compatible models can lose image input unless users manually enable support. Restore the image-support default before merging.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to 0b88e

Custom selections can stop contributing to the spending total used to pause automatic requests. Requests still use the selected service and credentials, but the spending safeguard can silently lose effectiveness. Independent request-count limits remain available.

Retained concerns

Medium · reliability · inferred: Newly preserved uncatalogued models receive zero-priced metadata. Their positive usage is reported and persisted with zero monetary cost, so billed requests cannot advance the cost threshold that pauses automatic requests. This extends an existing custom-provider accounting limitation to shared-base dependents. Known-model pricing and independent request-count limits remain intact.

Security review details

Security Blast Radius

inferred — The accounting exposure follows the shared-base resolver into dependent providers when an uncatalogued configured ID selects fallback metadata. The inspected Fireworks path binds requests to its provider endpoint and provider-specific credential independently of that identifier.

Security Findings and Attack Paths

inferred — For a billed uncatalogued deployment, repeated automatic requests can incur external charges while contributing zero to the locally enforced cost threshold. This establishes a resource-containment concern; attacker control of configuration or a cross-tenant privilege gain was not established.

Trust Boundaries and Controls

observed — The base constructor requires a credential and constructs the client from separately supplied endpoint and credential fields. Model resolution changes the request identifier and metadata, not those client bindings. Catalog membership no longer restricts which configured identifier reaches the request.

Resilience and Maintainability Implications

inferred — Completion, partial-usage capture and interruption paths persist accounting on request records. Retry and recovery do not supply missing pricing, so zero-cost records cannot restore cost-based containment. Independent request-count checks remain a countervailing control; asynchronous persistence and concurrent recovery were not runtime-validated.

Hardening Proposals

proposed — Represent unavailable pricing as unknown rather than free. When cost-based automatic-request limits are enabled, require explicit pricing or user acknowledgement before allowing uncatalogued deployments to continue automatically; retain independent request-count limits.

🚥 Pre-merge checks | ✅ 8

✅ Passed checks (8 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Issue `#1845` requires the configured custom Fireworks model to work. `BaseOpenAiCompatibleProvider.getModel()` now preserves the configured custom ID instead of using the provider default. The sane def…
Out of Scope Changes check	✅ Passed	The changed provider logic, sane defaults, Z.AI custom-ID handling, and related tests address custom OpenAI-compatible model selection or request metadata. The `supportsImages` default change limits a…
Regression Evidence	✅ Passed	PASS — The changed behaviors have focused lower-layer coverage. `base-openai-compatible-provider.spec.ts` covers known IDs, no configured ID, unknown custom IDs, streamed requests, prompt completion, …
Security Boundaries	✅ Passed	No changed path meets the security failure conditions. `BaseOpenAiCompatibleProvider.getModel()` now preserves a user-configured model ID, but it only places that string in the OpenAI `model` request …
Persistence Integrity	✅ Passed	PASS. The pull request changes model selection, metadata defaults, and OpenAI-compatible request construction only. The authoritative diff contains no persistence API, storage write, serialization, ro…
Lifecycle Resource Cleanup	✅ Passed	PASS: The changed paths only select model IDs and metadata, and omit the default `maxTokens` value. `BaseOpenAiCompatibleProvider.getModel` returns objects without creating resources. `useSelectedMode…
Title check	✅ Passed	The title clearly identifies the main change: updating OpenAI-compatible sane-default values for custom models. It is concise and related to the changeset.
Description check	✅ Passed	The description includes the linked issue, change summary, test procedure, checklist, and documentation decision. It omits several optional template sections, and the test procedure is brief, but the …

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github-actions · 2026-09-28T23:11:36Z

Review status

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Current step: Address automated review findings and push fixes.

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Review-state labels are managed by this workflow; do not edit them manually. community-approved is managed the same way — do not add or remove it manually. It signals a fresh community code approval for the current head as an advisory priority only; maintainer review is still required.

codecov · 2026-09-28T23:16:30Z

Codecov Report

✅ All modified and coverable lines are covered by tests.

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Previously, getModel() silently fell back to the provider default when the configured apiModelId wasn't found in the static providerModels list. This sent the wrong model to the API for user-supplied custom models (e.g. newly released Fireworks models), surfacing as confusing "model not found" errors. Now getModel() honors the exact user-configured ID and supplies openAiModelInfoSaneDefaults so the rest of the pipeline works, only falling back to the provider default when no model is configured. - Return known model metadata when the ID is in providerModels - Return the custom ID with sane defaults when unknown but configured - Fall back to the default only when no model ID is set

Custom models used sane-default metadata with maxTokens: -1 (unlimited), which Fireworks rejects with '400 max_tokens must be non-negative'. OpenAI API spec does not specify -1 as special value and explicitly allows max tokens to be omitted. Remove max tokens from the sane-default metadata.

p12tic · 2026-10-01T10:01:05Z

Also disabled image support by default.

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Actionable comments posted: 1

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Inline comments:
Review comments at @packages/types/src/providers/openai.ts:
- Line 937: Update supportsImages in openAiModelInfoSaneDefaults to true so
unlisted OpenAI-compatible models retain image inputs; leave maxTokens
unchanged.

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Run ID: 3f48338a-c448-4162-9669-be2c9599b9fa

📥 Commits

Reviewing files that changed from the base of the PR and between abc5805 and 0b88eaf.

📒 Files selected for processing (8)

packages/types/src/providers/openai.ts
src/api/providers/__tests__/base-openai-compatible-provider.spec.ts
src/api/providers/__tests__/fireworks.spec.ts
src/api/providers/__tests__/lmstudio.spec.ts
src/api/providers/__tests__/openai.spec.ts
src/api/providers/base-openai-compatible-provider.ts
webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts
webview-ui/src/components/ui/hooks/useSelectedModel.ts

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📜 Review details

⚠️ CI failures not shown inline (2)

GitHub Actions: Visual Regression / 2_webview-visual.txt: fix: update openai sane-default parameter values for custom models

Conclusion: failure

View job details

##[group]Run pnpm --filter @roo-code/vscode-webview test:visual
 �[36;1mpnpm --filter @roo-code/vscode-webview test:visual�[0m
 shell: sh -e {0}
 env:
   PNPM_HOME: /github/home/setup-pnpm/node_modules/.bin
   STORE_PATH: /__w/.pnpm-store/v10
 ##[endgroup]
 > @roo-code/vscode-webview@ test:visual /__w/Zoo-Code/Zoo-Code/webview-ui
 > playwright test -c playwright-ct.config.ts
 Running 53 tests using 2 workers
   ✓   1 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code dark theme (12.2s)
   ✓   2 [chromium] › src/components/chat/__tests__/Announcement.links.visual.tsx:4:1 › announcement links open exactly once through the extension host (15.1s)
   ✓   3 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code light theme (6.1s)
   ✓   4 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code high-contrast theme (6.6s)
   ✓   5 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code high-contrast-light theme (6.3s)
   ✓   6 [chromium] › src/components/chat/__tests__/ThemeAwareControls.visual.tsx:36:2 › renders selectors and confirmation dialogs in the VS Code dark theme (5.0s)
   ✓   7 [chromium] › src/components/chat/__tests__/ThemeAwareControls.visual.tsx:36:2 › renders selectors and confirmation dialogs in the VS Code light theme (3.8s)
   ✓   8 [chromium] › src/components/chat/__tests__/ThemeSensitiveStatus.visual.tsx:7:2 › audits status controls in the VS Code dark theme (4.3s)
   ✓   9 [chromium] › src/components/chat/__tests__/ThemeSensitiveStatus.visual.tsx:7:2 › audits status controls in the VS Code light theme (4.3s)
   ✓  10 [chromium] › src/components/chat/__tests__/ThemeSensitiveStatus.visual.tsx:7:2 › audits status controls in the VS Code high-contrast theme (4.1s)
   ✓  12 [ch...

GitHub Actions: Visual Regression / webview-visual: fix: update openai sane-default parameter values for custom models

Conclusion: failure

View job details

##[group]Run pnpm --filter @roo-code/vscode-webview test:visual
 �[36;1mpnpm --filter @roo-code/vscode-webview test:visual�[0m
 shell: sh -e {0}
 env:
   PNPM_HOME: /github/home/setup-pnpm/node_modules/.bin
   STORE_PATH: /__w/.pnpm-store/v10
 ##[endgroup]
 > @roo-code/vscode-webview@ test:visual /__w/Zoo-Code/Zoo-Code/webview-ui
 > playwright test -c playwright-ct.config.ts
 Running 53 tests using 2 workers
   ✓   1 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code dark theme (12.2s)
   ✓   2 [chromium] › src/components/chat/__tests__/Announcement.links.visual.tsx:4:1 › announcement links open exactly once through the extension host (15.1s)
   ✓   3 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code light theme (6.1s)
   ✓   4 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code high-contrast theme (6.6s)
   ✓   5 [chromium] › src/components/chat/__tests__/ChatTextArea.visual.tsx:7:2 › renders the production chat composer in the VS Code high-contrast-light theme (6.3s)
   ✓   6 [chromium] › src/components/chat/__tests__/ThemeAwareControls.visual.tsx:36:2 › renders selectors and confirmation dialogs in the VS Code dark theme (5.0s)
   ✓   7 [chromium] › src/components/chat/__tests__/ThemeAwareControls.visual.tsx:36:2 › renders selectors and confirmation dialogs in the VS Code light theme (3.8s)
   ✓   8 [chromium] › src/components/chat/__tests__/ThemeSensitiveStatus.visual.tsx:7:2 › audits status controls in the VS Code dark theme (4.3s)
   ✓   9 [chromium] › src/components/chat/__tests__/ThemeSensitiveStatus.visual.tsx:7:2 › audits status controls in the VS Code light theme (4.3s)
   ✓  10 [chromium] › src/components/chat/__tests__/ThemeSensitiveStatus.visual.tsx:7:2 › audits status controls in the VS Code high-contrast theme (4.1s)
   ✓  12 [ch...

🧰 Additional context used

📓 Path-based instructions (7)

Treat model, provider, MCP, path, command, and tool data as untrusted.