Evidence record / omp

A dated record of one change, kept so the writing that cites it can be checked. Compiled from the sources listed below by the research run, not written for reading. The judgment lives in the issues that cite it, below.

2026-10-13-omp-task-subagents-switched-to-plain-text-results-by-default-while-eval-spawns-stayed-structur

Task subagents switched to plain-text results by default, while eval spawns stayed structured. task.structured defaults false: the task tool hides outputSchema/schemaMode, removes schema and yield injection from its children, and returns the child’s final assistant message as plain text. Enabling the setting restores validated task-result schemas. Eval agent() and workpool() spawns keep structured results independently.

Channel: tagged-release. Half: both. Date: 2026-10-12 (v18.10.2).

Operator consequence: Enable task.structured explicitly for task consumers requiring schema-validated output; do not assume the same default affects eval spawns. Check consumers before upgrading a fleet.

Receipt

Finding metadata

Run: 2026-10-13-profile-refresh-2026-09-21_2026-10-13-frontier-v0

Finding ID: 2026-10-13-omp-task-subagents-switched-to-plain-text-results-by-default-while-eval-spawns-stayed-structur

Profile citations

  • omp / claim / plain-task-results

Source links

Primary links, including exact changelog lines when available.

Versioned source: run artifact