Feature Request: Show date/timestamp in subagent session picker (ctrl+x) #16341

Feature Request

Problem
When browsing subagent sessions with ctrl+x, there's no visible date or timestamp. This makes it difficult to distinguish recent sessions from old, irrelevant ones.

Current behavior
The subagent session picker shows:

• Session name/task
• No date or timestamp

Desired behavior
Show creation date or last activity timestamp for each subagent session in the picker, e.g.:

[2026-03-06 10:30] explore: analyze codebase structure
[2026-03-05 14:15] hephaestus: refactor auth module
[2026-03-01 09:00] oracle: research API patterns

Use case
When debugging or reviewing subagent work, I often open old sessions by mistake because I can't tell which are recent. A simple timestamp would solve this.

Related

• How do I find session ids for -s/--session? #4557 (similar UX issue with /sessions command lacking IDs)

Environment

• OpenCode: 1.2.17
• OS: macOS