Codex Desktop: aggregate subagent edits into the parent task’s “Edited files” card

Feature request

When a parent Codex task delegates implementation work to subagents, the parent task’s Edited N files card and Review view should aggregate every file changed on behalf of that task, including edits performed by descendant subagents.

The displayed file count, additions/deletions, per-file list, Review diff, and Undo scope should represent the complete task-level change set—not only edits issued directly by the main agent.

Why this matters

In a multi-agent task, the parent card reported an edited-file count that excluded several required changes made by subagents. Those files were present in the Git working tree, so the card looked authoritative while showing only a partial manifest.

This creates:

• incomplete review coverage;
• a risk that users believe files or packages were untouched;
• uncertainty about whether Undo reverts the full task;
• a mismatch between the assistant’s completion report and the visible artifact list.

The parent task is the unit the user authorized. Delegation to subagents should be an implementation detail rather than a reason for the task-level review surface to omit changes.

Expected behavior

For a parent task, collect mutations from the main agent and every descendant subagent, then show their final union:

• all modified, added, deleted, and renamed files;
• aggregate additions/deletions;
• co-edited files deduplicated to the final task diff;
• optional provenance per file (main agent or subagent);
• Undo scoped to the entire aggregated task, or clearly labeled if child edits cannot be included.

Child-agent transcripts can remain separate, but task-level review and Undo should be complete.

Reproduction

1. Start a Codex Desktop task in a Git worktree.
2. Have the main agent spawn one or more subagents that edit files.
3. Have the main agent edit other files.
4. Finish the task.
5. Open the parent task’s Edited N files card.
6. Compare the card with git status or the worktree diff.

Actual: Only files attributed to the main agent appear in the parent card.

Expected: All files changed by the task and its subagents appear.

Environment

Observed in Codex Desktop on macOS during a multi-agent task. No private repository details are included.