### Fixes

- Control UI/cron: keep the runtime-only `last` delivery sentinel from being materialized into persisted cron delivery and failure-alert channel configs when jobs are created or edited. (#68829) Thanks @tianhaocui.

- OpenAI/Responses: strip orphaned reasoning blocks before outbound Responses API calls so compacted or restored histories no longer fail on standalone reasoning items. (#55787) Thanks @suboss87.

## 2026.4.19-beta.2

* is incomplete, drop the block to keep history usable.

*/

export function downgradeOpenAIReasoningBlocks(messages: AgentMessage[]): AgentMessage[] {

let anyChanged = false;

const out: AgentMessage[] = [];

for (const msg of messages) {

continue;

}

anyChanged = true;

if (nextContent.length === 0) {

continue;

}

out.push({ ...assistantMsg, content: nextContent } as AgentMessage);

}

return out;

return anyChanged ? out : messages;

}

import type { EmbeddedContextFile } from "../../pi-embedded-helpers.js";

import {

downgradeOpenAIFunctionCallReasoningPairs,

downgradeOpenAIReasoningBlocks,

isCloudCodeAssistFormatError,

resolveBootstrapMaxChars,

resolveBootstrapPromptTruncationWarningMode,

if (!Array.isArray(messages)) {

return inner(model, context, options);

}

const sanitized = downgradeOpenAIFunctionCallReasoningPairs(messages as AgentMessage[]);

// Strip orphaned reasoning blocks first, then fix function-call

// pairing — matches the call order in google.ts.

const reasoningSanitized = downgradeOpenAIReasoningBlocks(messages as AgentMessage[]);

const sanitized = downgradeOpenAIFunctionCallReasoningPairs(reasoningSanitized);

if (sanitized === messages) {

return inner(model, context, options);

}