Group / nest related sessions in the Recents list (tree or "project" view)

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

What problem are you trying to solve?

A single undertaking frequently spans many separate Claude Code sessions, but
Recents is a flat, time-ordered list with nothing that ties related sessions
together.

Concrete example from my own use: one infrastructure effort — migrating an
office VPN to WireGuard — sprawled across ~7 sessions: an initial pilot,
hardware research, an on-site visit, the network cutover, user onboarding, an
access-control sweep, and a controller upgrade. In Recents these appear as 7
unrelated entries interleaved with dozens of other sessions. The costs:

• Discoverability: no way to pull up "everything about this effort" or see

its arc at a glance.

• Stale context: a decision or fix reached in one session isn't visible from

its siblings, so it's easy to resume a related session on out-of-date
assumptions. (This bit me directly — a fix landed in a sibling session and the
thread I was working in had no idea it existed.)

• Mental-model mismatch: people think in projects/initiatives, not one flat

timeline.

Proposed Solution

The ability to group or nest related sessions in Recents — a collapsible tree,
or "project"/folder grouping — so all sessions in one undertaking live together
and can be browsed as a unit.

Possible shapes (illustrative, not prescriptive):

• User-created groups/folders sessions can be filed under (manual or drag).
• A parent→child link so a session spawned from another nests under it —

spawned background tasks already have a parent session, so the linkage often
already exists.

• Auto-grouping by repo / worktree / branch as a zero-effort default.
• Tags/labels with a collapsible "group by tag" view.

Anything else?

Today I approximate this with title-prefix conventions and cross-linked notes,
but nothing surfaces the relationship in the Recents pane where it's needed.

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_