Add opt-in Responses API support for OpenAI-compatible providers - #1071
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Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review. 📝 WalkthroughWalkthroughThe change adds configurable Responses API support for OpenAI-compatible and Azure providers. It adds provider endpoint storage, popup controls, request routing, streaming response handling, fallback routing, buffered JSON parsing, and shared cancellation behavior. ChangesResponses API protocol integration
Priority: ➖ Normal Estimated code review effort: 5 (Critical) | ~90 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Client
participant OpenAICompatibleAPI
participant ResponsesAPI
participant ChatCompletionsAPI
participant ConversationStore
Client->>OpenAICompatibleAPI: Start generation
OpenAICompatibleAPI->>ResponsesAPI: Send Responses request
ResponsesAPI-->>OpenAICompatibleAPI: Stream output events
OpenAICompatibleAPI->>Client: Post answer updates
OpenAICompatibleAPI->>ConversationStore: Save completed conversation
ResponsesAPI-->>OpenAICompatibleAPI: Unsupported route error
OpenAICompatibleAPI->>ChatCompletionsAPI: Retry with Chat Completions
ChatCompletionsAPI-->>Client: Stream fallback answer
Merge Risk: 🟡 Moderate · up to Provider credentials may be exposed in plaintext when using remote HTTP Responses endpoints. Require HTTPS for non-local endpoints before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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PR Summary by QodoAdd opt-in Responses API support for OpenAI-compatible providers
AI Description
Diagram
High-Level Assessment
Files changed (25)
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Code Review by Qodo
1. Two English entries exceed 100 columns
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![qodo-code-review[bot]](https://avatars.githubusercontent.com/in/484649?s=60&v=4){kind=small}
| type="text" | ||
| ref={providerBaseUrlInputRef} | ||
| value={providerDraft.apiUrl} | ||
| placeholder="https://api.example.com/v1/chat/completions" |
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1. Provider editor uses double quotes 📘 Rule violation ⚙ Maintainability
ApiModes, ApiUrl, and GeneralPart add double-quoted JSX literals for endpoint type and placeholder attributes, protocol option value attributes, and the Azure Responses checkbox type attribute. Edits that copy these controls or add adjacent endpoint, protocol, or provider settings can propagate the inconsistent quoting pattern throughout the provider editor.
Agent Prompt
## Issue description
The new provider editor controls use double quotes for JSX string attributes instead of the required single quotes. This affects endpoint fields, protocol option values, and the Azure Responses checkbox.
## Fix Focus Areas
- src/popup/sections/ApiModes.jsx[564-567]
- src/popup/sections/ApiModes.jsx[589-592]
- src/popup/sections/ApiModes.jsx[616-618]
- src/popup/sections/AdvancedPart.jsx[149-150]
- src/popup/sections/GeneralPart.jsx[780-780]
## Recommended Fix
Convert the new `type`, `placeholder`, and option `value` JSX attributes from double quotes to single quotes without changing their values. In particular, update both protocol option values and change the Azure Responses checkbox attribute to `type='checkbox'`.
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JSX attributes use double quotes under the existing Prettier configuration. singleQuote applies to JavaScript strings; JSX quoting is controlled separately by jsxSingleQuote, which is not enabled. No change is needed.
| function assertSupportedChatEndpoint(requestUrl) { | ||
| if (hasNativeOllamaChatApiPath(requestUrl)) { | ||
| throw new Error( | ||
| 'Unsupported native Ollama chat endpoint. Use the OpenAI-compatible /v1/chat/completions endpoint instead.', |
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2. One endpoint error exceeds 100 columns 📘 Rule violation ⚙ Maintainability
assertSupportedChatEndpoint adds a 130-character physical line containing the unsupported-endpoint error message. Any width-enforced formatting or source check continues to reject this file until the message is wrapped.
Agent Prompt
## Issue description
The newly added unsupported-endpoint error line is 130 characters wide, exceeding the 100-character source limit.
## Fix Focus Areas
- src/services/apis/openai-api.mjs[209-211]
## Recommended Fix
Split the error message across multiple physical lines using string concatenation or another project-compatible wrapping style, keeping every line at or below 100 characters.
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| "API Protocol": "API Protocol", | ||
| "Chat Completions URL": "Chat Completions URL", | ||
| "Responses URL": "Responses URL", | ||
| "Default protocol": "Default protocol", |
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3. Localized users see english controls 📘 Rule violation ⚙ Maintainability
src/_locales/en/main.json adds 12 keys without corresponding translations or placeholders in any other locale resource. Selecting a non-English locale reaches the English fallback for the new protocol fields, endpoint guidance, validation message, and Azure preview option.
Agent Prompt
## Issue description
The 12 new English localization keys are omitted from every additional locale, leaving non-English users dependent on English fallback text.
## Fix Focus Areas
- src/_locales/de/main.json[118-140]
- src/_locales/es/main.json[118-140]
- src/_locales/fr/main.json[118-140]
- src/_locales/id/main.json[118-140]
- src/_locales/it/main.json[118-140]
- src/_locales/ja/main.json[118-140]
- src/_locales/ko/main.json[118-140]
- src/_locales/pt/main.json[118-140]
- src/_locales/ru/main.json[118-140]
- src/_locales/tr/main.json[118-140]
- src/_locales/zh-hans/main.json[118-140]
- src/_locales/zh-hant/main.json[118-140]
## Recommended Fix
Add every key introduced at English lines 128-139 to each supported locale file, using an accurate translation or the repository's clearly marked placeholder convention.
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✅ No new issues found.
Reviewed changes — full read of the 25-file diff against master, plus surrounding callers, resolver, SSE utility, and the new/updated test suites; verified with npm test (1610 pass), npm run build, and ESLint on every changed source file.
- Opt-in protocol selection — adds global
openaiApiProtocol, per-providerapiProtocol/responsesUrl, an optional session override, and AzureazureUseResponses, defaulting to Chat Completions. - New Responses core —
openai-responses-core.mjsbuilds the request body (input,max_output_tokens,text.format,store:false), parses typed SSE events and buffered JSON, and surfaces failures instead of completing an empty answer. - Routing + fallback —
openai-api.mjsroutes to Responses and falls back to the configured Chat Completions URL only on initial route-unsupported HTTP errors (any 404; 400/405/501 only when the error names the Responses route), never after partial streaming. - Cancellation safety —
withAbortControllershares a single controller/listener set across both protocol attempts, with the outer request owning cleanup, so a stop/disconnect cannot start a fallback or persist a later answer. - SSE JSON buffering —
fetchSSEgains opt-inbufferJsonResponse, decoding across reads, sniffing JSON vs SSE, and parsing once at EOF. - Config + UI — config normalization/migration for the new fields, provider editor URL/protocol fields, Azure preview checkbox, and 12 new English strings.
- Tests — ~2600 lines across protocol, storage round-trip, URL derivation, fallback classification, cancellation lifecycle, and buffered-JSON suites with exact assertions.
Notes (not issues): the new labels intentionally rely on the English fallback for other locales, and Azure Responses is a preview path verified only by mocks. The new UI wiring has no component tests, consistent with the rest of the repo.
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🟡 Changes recommended
One critical buffering issue and three moderate Responses-handling issues remain unresolved.
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Pull request overview
Adds opt-in Responses API support for OpenAI-compatible and Azure providers while keeping Chat Completions as the default.
Changes:
- Adds protocol and endpoint configuration, migration, and UI support.
- Implements Responses streaming, JSON handling, fallback, and cancellation.
- Adds Azure preview support and extensive regression tests.
File summaries
| File | Reviewed changes |
|---|---|
tests/unit/utils/fetch-sse.test.mjs |
Tests SSE and buffered JSON behavior. |
tests/unit/services/apis/openai-responses-review-regressions.test.mjs |
Adds Responses regression coverage. |
tests/unit/services/apis/openai-responses-protocol.test.mjs |
Tests protocol routing and endpoint selection. |
tests/unit/services/apis/openai-responses-online-review.test.mjs |
Tests malformed and incomplete Responses payloads. |
tests/unit/services/apis/openai-responses-fallback.test.mjs |
Tests fallback classification. |
tests/unit/services/apis/openai-responses-core.test.mjs |
Tests Responses requests, parsing, and completion. |
tests/unit/services/apis/openai-cancellation-lifecycle.test.mjs |
Tests cancellation across request and fallback lifecycles. |
tests/unit/services/apis/azure-openai-temperature.test.mjs |
Tests Azure request behavior. |
tests/unit/popup/provider-responses-edit.test.mjs |
Tests provider editor behavior and persistence. |
tests/unit/config/migrate-user-config.test.mjs |
Tests configuration migration. |
src/utils/fetch-sse.mjs |
Adds buffered JSON support. Critical (2 votes): buffer jsonText and pendingChunks need maximum size limits with failure/cancellation on overflow. |
src/services/apis/shared.mjs |
Shares abort-controller lifecycle handling. |
src/services/apis/provider-registry.mjs |
Resolves protocols and derived URLs. |
src/services/apis/openai-responses-core.mjs |
Implements Responses handling. Moderate (1 vote): preserve JSON-schema descriptions in text.format.description; handle response.output_text.done; classify unsupported custom Responses routes using the requested URL/path for fallback. |
src/services/apis/openai-compatible-core.mjs |
Updates cancellation-aware Chat requests. |
src/services/apis/openai-api.mjs |
Adds protocol routing and Chat fallback. |
src/services/apis/azure-openai-api.mjs |
Adds Azure Responses preview support. |
src/popup/sections/provider-secret-utils.mjs |
Preserves protocol during provider materialization. |
src/popup/sections/GeneralPart.jsx |
Adds the Azure Responses option. |
src/popup/sections/ApiModes.jsx |
Adds provider protocol and endpoint controls. |
src/popup/sections/api-modes-provider-utils.mjs |
Validates and persists provider endpoints. |
src/popup/sections/AdvancedPart.jsx |
Adds global protocol controls. |
src/config/index.mjs |
Normalizes protocol and endpoint settings. |
src/_locales/en/main.json |
Adds English configuration labels. |
Review details
Suppressed comments (3)
src/services/apis/openai-responses-core.mjs:35
- This conversion drops the optional
descriptionfrom a Chat Completions JSON-schema response format (response_format.descriptionor nestedjson_schema.description). Providers use this field as model-facing schema guidance, so Responses requests silently lose metadata even though this function is intended to preserve the schema contract; carry it intotext.format.description.
name: responseFormat.name || responseFormat.json_schema?.name || 'response',
strict: (responseFormat.strict ?? responseFormat.json_schema?.strict) !== false,
schema: responseFormat.schema || responseFormat.json_schema?.schema || {},
src/services/apis/openai-responses-core.mjs:190
- The Responses stream also defines
response.output_text.done, whosetextis the completed text for an output item. Since this only consumesresponse.output_text.delta, a compatible stream that emits the final text without deltas leavesanswerempty and then throwsResponses API completed without output textat[DONE], even though the payload contains an answer. Handle this event and reconcile its full text with any preceding deltas before terminal processing.
if (eventType === 'response.output_text.delta' && typeof data.delta === 'string') {
return { answer: answer + data.delta, done: false, failed: false }
}
src/services/apis/openai-responses-core.mjs:144
- Because this accepts arbitrary
responsesUrlvalues, a compatible server can report an unsupported custom route as400 {"error":{"message":"Unknown URL /custom/respond"}}(orThe endpoint /custom/respond is not supported).namesResponsesRouteonly recognizes/v1/responses,/openai/responses, or the literalResponses API, soisResponsesRouteUnsupportedErrorreturns false and the configured Chat URL is never tried. Classify against the actual requested Responses URL/path (or pass it into this helper) while retaining the existing Chat-route exclusion.
const namesResponsesRoute =
/\/(?:v1|openai)\/responses\b|\bresponses\s+api\b|\bresponses\b.*api-version|api-version.*\bresponses\b/i.test(
message,
)
if (!namesResponsesRoute) return false
- Files reviewed: 24/25 changed files
- Comments generated: 1
- Review effort level: Lite
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Inline comments:
In `@src/popup/sections/api-modes-provider-utils.mjs`:
- Around line 421-423: Update the URL validation producing valid and
responsesUrl so non-loopback HTTP Responses endpoints are rejected; permit http:
only when the parsed URL host is explicitly loopback, while preserving HTTPS
support and existing username, password, and hash rejection.
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ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Advanced
Run ID: ea1120aa-35e2-4162-afa4-eb33de306455
⛔ Files ignored due to path filters (1)
screenshots/provider-responses-editor.pngis excluded by!**/*.png
📒 Files selected for processing (24)
src/_locales/en/main.jsonsrc/config/index.mjssrc/popup/sections/AdvancedPart.jsxsrc/popup/sections/ApiModes.jsxsrc/popup/sections/GeneralPart.jsxsrc/popup/sections/api-modes-provider-utils.mjssrc/popup/sections/provider-secret-utils.mjssrc/services/apis/azure-openai-api.mjssrc/services/apis/openai-api.mjssrc/services/apis/openai-compatible-core.mjssrc/services/apis/openai-responses-core.mjssrc/services/apis/provider-registry.mjssrc/services/apis/shared.mjssrc/utils/fetch-sse.mjstests/unit/config/migrate-user-config.test.mjstests/unit/popup/provider-responses-edit.test.mjstests/unit/services/apis/azure-openai-temperature.test.mjstests/unit/services/apis/openai-cancellation-lifecycle.test.mjstests/unit/services/apis/openai-responses-core.test.mjstests/unit/services/apis/openai-responses-fallback.test.mjstests/unit/services/apis/openai-responses-online-review.test.mjstests/unit/services/apis/openai-responses-protocol.test.mjstests/unit/services/apis/openai-responses-review-regressions.test.mjstests/unit/utils/fetch-sse.test.mjs
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Allow OpenAI-compatible providers and Azure deployments to opt into Responses while preserving explicit endpoints, queries, provider edits, secret materialization, and configuration migration. Handle streamed and complete responses, reject malformed, failed, or empty answers, and preserve structured-output metadata. Only retry unsupported routes against a valid configured Chat endpoint. Share cancellation through configuration loading and fallback so stopped requests cannot restart or save answers. Preserve unchanged dormant Responses settings during explicit Chat edits without accepting new invalid endpoints. Include editor evidence and regression coverage for protocol selection, persistence, fallback, cancellation, schema metadata, and Azure temperature policy.
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Updated the response handling:
The existing endpoint transport policy is unchanged: Chat and Responses both permit explicitly configured HTTP endpoints for self-hosted services. HTTP does not protect credentials or conversation content in transit; HTTPS should be used for untrusted networks. Restricting only the Responses editor would break existing configurations without establishing a consistent runtime policy. The formatting follows the repository's Prettier configuration: JavaScript singleQuote does not change JSX attribute quoting, and printWidth is not a hard maximum for string literals. The new UI strings continue to use the configured English fallback; additional translations can follow separately. Whole-response completion checks and the stricter 400/405/501 fallback criteria remain unchanged. A text-part completion is not overall response completion, and an ambiguous 400 response from an arbitrary custom path is not enough to justify resending the request using another protocol. Generic initial HTTP 404 responses intentionally permit fallback, including servers that provide no API-specific error body. This can also retry a missing-model or missing-deployment response against the configured Chat endpoint; a 404 is not proof that the route itself is absent. The retry retains the configured model or deployment and shared cancellation state, and never follows a mid-stream failure. Distinguishing resource-not-found errors from unsupported-route 404s would be a separate compatibility-policy change. |
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✅ No new issues found.
Reviewed changes — incremental delta since the last Pullfrog review (4ea86a2 → f8a4468), read against the authoritative full diff plus the buffered-JSON and Responses-core unit suites.
- Structured-output metadata preserved —
convertResponseFormatToTextFormatnow carriesdescription(top-level??nested) into Responsestext.format, with an exact-precedence test for the empty-string case. - Buffered-JSON memory bound —
fetchSSEcapsbufferJsonResponsepayloads at 16 MiB, counting raw UTF-8 bytes, cancelling the reader best-effort on overflow, and reporting viaonErrorwithoutonEnd; SSE-delivered chunks are exempt. - Format-sniffing refactor — when the first non-whitespace character resolves the stream to SSE, buffered
pendingChunksand the current chunk are fed once, preserving incremental delivery.
Verified locally: tests/unit/utils/fetch-sse.test.mjs 33/33 pass and tests/unit/services/apis/openai-responses-core.test.mjs 30/30 pass. The overflow error carries no .status, so shouldFallbackToChatCompletions correctly declines to retry, and no provider other than the Responses core opts into the new buffering.
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🟡 Changes recommended
Resolve the unhandled asynchronous SSE callback failures and narrow the overly broad 404 fallback behavior.
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Review details
Suppressed comments (1)
src/services/apis/openai-responses-core.mjs:128
- This treats every HTTP 404 as an unsupported Responses route, so a missing model, deployment, or other resource can trigger a Chat Completions request even though the Responses route exists. That can hide the actionable not-found error and issue an unintended second request; restrict 404 fallback to a route/API-version incompatibility (or an explicit provider error code), just as the other eligible statuses are classified.
if (error?.status === 404) return true
- Files reviewed: 24/25 changed files
- Comments generated: 1
- Review effort level: Lite
| try { | ||
| for (const pendingChunk of pendingChunks) parser.feed(pendingChunk) | ||
| parser.feed(chunk) | ||
| } catch (err) { |
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The buffered JSON branch awaits onMessage directly after EOF (src/utils/fetch-sse.mjs:224-225), and its catch routes a rejection through handleCallbackError. That branch does not dispatch through parser.feed. The Responses onMessage handler is also synchronous. Asynchronous callbacks for the generic SSE parser would require a separate contract change; its synchronous callback dispatch already exists on master.
| "Use the global OpenAI setting where applicable; otherwise use Chat Completions.": "Use the global OpenAI setting where applicable; otherwise use Chat Completions.", | ||
| "Optional when Responses has an explicit URL.": "Optional when Responses has an explicit URL.", | ||
| "Leave empty to derive from the Chat Completions URL.": "Leave empty to derive from the Chat Completions URL.", |
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1. Two english entries exceed 100 columns 📘 Rule violation ⚙ Maintainability
The localization entries at lines 132 and 134 place each English key and its identical value on one physical line longer than 100 characters. Width-based source checks encounter lengths of 166 and 114 characters when processing the newly added protocol guidance.
Agent Prompt
## Issue description
Two newly added English localization entries exceed the 100-character physical line limit.
## Fix Focus Areas
- src/_locales/en/main.json[132-134]
## Recommended Fix
Format each long JSON property across separate key and value lines so every physical line remains at or below 100 characters without changing either string.
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These entries follow the repository's canonical Prettier JSON formatting. printWidth is a printing target, not a hard maximum for every JSON property, and there is no ESLint max-len rule here. Manually separating these keys and string values would be rejoined by the formatter; keeping the canonical output avoids a formatting-only conflict without changing either string.
| } | ||
| if (typeof message !== 'string') return false | ||
| const namesResponsesRoute = | ||
| /\/(?:v1|openai)\/responses\b|\bresponses\s+api\b|\bresponses\b.*api-version|api-version.*\bresponses\b/i.test( |
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2. Two response matchers exceed 100 columns 📘 Rule violation ⚙ Maintainability
isResponsesRouteUnsupportedError adds regular-expression matchers at lines 143 and 156 whose physical lengths are 118 and 137 characters. Width-based source checks reach both expressions while validating the new unsupported-route fallback implementation.
Agent Prompt
## Issue description
Two regular-expression matchers in the unsupported Responses route classifier exceed the 100-character physical line limit.
## Fix Focus Areas
- src/services/apis/openai-responses-core.mjs[143-143]
- src/services/apis/openai-responses-core.mjs[156-156]
## Recommended Fix
Refactor each long matcher into named pattern fragments or otherwise split its construction across physical lines while preserving the existing matching behavior and flags.
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The repository's formatter keeps regular-expression literals intact, and its printWidth setting is not a hard line-length limit. There is no ESLint max-len rule here. These expressions follow that configured style; converting them into dynamically assembled fragments solely for column width would be unrelated refactoring.
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Code review by qodo was updated up to the latest commit f8a4468 |
Summary
Add opt-in Responses API support for OpenAI-compatible providers and Azure OpenAI while keeping Chat Completions as the default.
Changes
Configuration
Select Responses in the provider's API Protocol setting to opt in. An explicit Responses URL can be used independently of the Chat Completions URL. The Default protocol option follows the global OpenAI setting where applicable and otherwise uses Chat Completions.
Azure uses a separate Use Responses API (Azure preview) option. Availability depends on the configured deployment. Legacy prompt-based Completions endpoints continue using their existing protocol.
Provider settings
Summary by CodeRabbit
New Features
Bug Fixes