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refactor(open-sse): extract chunkBuilder, dedup chat.completion.chunk (B1)

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Add helpers/chunkBuilder.js; apply to claude/gemini/kiro/ollama/commandcode/
openai-responses response translators. Caller supplies id/created/model so each
keeps exact id-generation + usage semantics. Extend golden response stream to
openai-responses (codex). No behavior change; gate: no regression.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
decolua
2026-06-13 17:05:42 +07:00
parent 0e34358e74
commit 17202f7111
10 changed files with 270 additions and 295 deletions
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129
open-sse/translator/response/openai-responses.js
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@@ -4,6 +4,7 @@
*/
import { register } from "../index.js";
import { FORMATS } from "../formats.js";
import { buildChunk } from "../helpers/chunkBuilder.js";
/**
* Translate OpenAI chunk to Responses API events
@@ -377,17 +378,11 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
state.finishReasonSent = true;
state.finishReason = finishReason;
const finalChunk = {
id: state.chatId || `chatcmpl-${Date.now()}`,
object: "chat.completion.chunk",
created: state.created || Math.floor(Date.now() / 1000),
model: state.model || "unknown",
choices: [{
index: 0,
delta: {},
finish_reason: finishReason
}]
};
const finalChunk = buildChunk(
{ id: state.chatId || `chatcmpl-${Date.now()}`, created: state.created || Math.floor(Date.now() / 1000), model: state.model || "unknown" },
{},
finishReason
);
if (state.usage && typeof state.usage === "object") {
finalChunk.usage = state.usage;
@@ -414,17 +409,10 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
const delta = data.delta || "";
if (!delta) return null;
return {
id: state.chatId,
object: "chat.completion.chunk",
created: state.created,
model: state.model || "unknown",
choices: [{
index: 0,
delta: { content: delta },
finish_reason: null
}]
};
return buildChunk(
{ id: state.chatId, created: state.created, model: state.model || "unknown" },
{ content: delta }
);
}
// Text content done (ignore, we handle via delta)
@@ -437,27 +425,17 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
const item = data.item;
state.currentToolCallId = item.call_id || `call_${Date.now()}`;
return {
id: state.chatId,
object: "chat.completion.chunk",
created: state.created,
model: state.model || "unknown",
choices: [{
index: 0,
delta: {
tool_calls: [{
index: state.toolCallIndex,
id: state.currentToolCallId,
type: "function",
function: {
name: item.name || "",
arguments: ""
}
}]
},
finish_reason: null
}]
};
return buildChunk(
{ id: state.chatId, created: state.created, model: state.model || "unknown" },
{
tool_calls: [{
index: state.toolCallIndex,
id: state.currentToolCallId,
type: "function",
function: { name: item.name || "", arguments: "" }
}]
}
);
}
// Function call arguments delta (standard or custom_tool_call variant)
@@ -465,22 +443,10 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
const argsDelta = data.delta || "";
if (!argsDelta) return null;
return {
id: state.chatId,
object: "chat.completion.chunk",
created: state.created,
model: state.model || "unknown",
choices: [{
index: 0,
delta: {
tool_calls: [{
index: state.toolCallIndex,
function: { arguments: argsDelta }
}]
},
finish_reason: null
}]
};
return buildChunk(
{ id: state.chatId, created: state.created, model: state.model || "unknown" },
{ tool_calls: [{ index: state.toolCallIndex, function: { arguments: argsDelta } }] }
);
}
// Function call done (standard or custom_tool_call variant)
@@ -520,18 +486,12 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
state.finishReasonSent = true;
state.finishReason = finishReason; // Mark for usage injection in stream.js
const finalChunk = {
id: state.chatId,
object: "chat.completion.chunk",
created: state.created,
model: state.model || "unknown",
choices: [{
index: 0,
delta: {},
finish_reason: finishReason
}]
};
const finalChunk = buildChunk(
{ id: state.chatId, created: state.created, model: state.model || "unknown" },
{},
finishReason
);
// Include usage in final chunk if available
if (state.usage && typeof state.usage === "object") {
finalChunk.usage = state.usage;
@@ -553,17 +513,11 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
state.finishReasonSent = true;
// Surface the error as an OpenAI-compatible error chunk
return {
id: state.chatId || `chatcmpl-${Date.now()}`,
object: "chat.completion.chunk",
created: state.created || Math.floor(Date.now() / 1000),
model: state.model || "unknown",
choices: [{
index: 0,
delta: { content: `[Error] ${error.message || JSON.stringify(error)}` },
finish_reason: "stop"
}]
};
return buildChunk(
{ id: state.chatId || `chatcmpl-${Date.now()}`, created: state.created || Math.floor(Date.now() / 1000), model: state.model || "unknown" },
{ content: `[Error] ${error.message || JSON.stringify(error)}` },
"stop"
);
}
return null;
}
@@ -572,13 +526,10 @@ export function openaiResponsesToOpenAIResponse(chunk, state) {
if (eventType === "response.reasoning_summary_text.delta") {
const delta = data.delta || "";
if (!delta) return null;
return {
id: state.chatId,
object: "chat.completion.chunk",
created: state.created,
model: state.model || "unknown",
choices: [{ index: 0, delta: { reasoning_content: delta }, finish_reason: null }]
};
return buildChunk(
{ id: state.chatId, created: state.created, model: state.model || "unknown" },
{ reasoning_content: delta }
);
}
// Ignore other events