Distillation

Date: Sep 16, 2026

• 🟡 (22:35) Additional test diff context covered reasoning-output validation cases named "done content extra fields", strict reasoning streams, malformed summaries, sparse content, and oversized response.output_item.added reasoning summaries.
• 🟡 (22:35) Test fixtures exercised reasoning content including { type: "reasoning_text", text: marker }, arrays created with Array.from({ length: 17 }, ...), maxRecallExecutions: 3, anchor text "private strict anchor", fallback response ID "resp_strict_fallback", and model "gpt-5.6-terra".
• 🟡 (22:35) A parameterized strict-reasoning test constructed invalid streams via makeInvalidStream, derived slug with name.replaceAll(" ", "_"), drained the client with drain(client), and asserted expect(output).not.toContain(nestedQuery).
• 🟡 (22:36) Investigation searched /home/byk/Code/opencode-lore-codex-reasoning/packages/gateway/src/pipeline.ts and found 28 references involving ResponsesAccState, streamResponsesRecallAware, maxSparseIndex, and outputIdentities.
• 🟡 (22:36) streamResponsesRecallAware is exported at packages/gateway/src/pipeline.ts:7794; maxSparseIndex is initialized at line 7879 as Math.min(maxSSEFrames, DEFAULT_MAX_SSE_FRAMES), and outputIdentities is initialized at line 7882 as new Set<string>().
• 🟡 (22:36) Sparse-index and collection limits in packages/gateway/src/pipeline.ts compare against maxSparseIndex, including errors formatted as Responses ${description} exceeded ${maxSparseIndex} item limit; checks occur for raw parts, normalized parts, output indices, content indices, summary indices, and shifted indices.
• 🟡 (22:36) outputIdentities lifecycle in packages/gateway/src/pipeline.ts includes identity membership checks, additions such as outputIdentities.add(finalFunctionIdentity.callId), snapshotting via new Set(outputIdentities), restoration by outputIdentities.clear() followed by re-adding continuationRetryBaseline.outputIdentities, and later clearing.
• 🟡 (22:36) A second search found 49 accumulator-related references in packages/gateway/src/pipeline.ts, including makeResponsesAccState, normalizeCodexEvent, seedImplicitCodexItem, validateResponseLifecycle, preserveOmittedCodexReasoning, applyResponsesEvent, and finalizeResponsesAcc.
• 🟡 (22:36) The principal Responses stream initializes state = makeResponsesAccState() at packages/gateway/src/pipeline.ts:7877; event handling around lines 10338–10413 performs normalizeCodexEvent(...), validateResponseLifecycle(state, event, parsed), seedImplicitCodexItem(...), then applyResponsesEvent(state, event, parsed).
• 🟡 (22:36) Continuation handling creates contState = makeResponsesAccState() at packages/gateway/src/pipeline.ts:10779; around lines 10953–11037 it normalizes continuation events, validates lifecycle, seeds implicit Codex items, and applies events before calls to finalizeResponsesAcc(contState) at lines 11353, 11397, and 11476.
• 🟡 (22:36) packages/gateway/src/pipeline.ts imports applyResponsesEvent, finalizeResponsesAcc, makeResponsesAccState, normalizeCodexResponsesEvent, ResponsesTerminalError, and type ResponsesAccState from ./stream/openai-responses, along with validators including isSupportedResponsesOutputItemType, isValidResponsesOutputItemStatus, isValidResponsesReasoningEncryptedContent, responsesDoneItemMatchesAdded, and responsesTerminalItemMatches.
• 🟡 (22:36) Definition lookup in packages/gateway/src/stream/openai-responses.ts found ResponsesAccState at line 48, makeResponsesAccState() at line 556, applyResponsesEvent(...) at line 582, finalizeResponsesAcc(...) at line 815, and normalizeCodexResponsesEvent(...) at line 1750.