Two rounds of agent-handoff dogfood testing surfaced that Smriti had no
way to delete spaces, sessions, or checkpoints via any surface. This
adds DELETE endpoints to the V2/V4 API, new CLI commands, and UI
affordances on the workspace overview and chat history panel so the
daily cleanup path does not require opening a Python shell.
Checkpoint delete refuses with 409 Conflict when child commits or
forked sessions reference the target, because silently orphaning them
would cause walk_ancestors to collapse lineage and forked sessions to
lose isolation. The refusal is escaped via ?cascade=true on the API,
--cascade on the CLI, and a two-step confirm with a dependents list
plus checkbox in the UI modal.
Space delete relies on the existing DB-level cascade chain from the
earlier commit/session/turn migrations — no new Alembic migration is
needed. Session delete cascades turn events but preserves commits
authored by the session, since commits are space-owned artifacts.
14 integration tests cover cascade correctness, 409 refusal, the
cascade escape hatch, cross-user 404s, subtree ordering, and
idempotency. Existing tests pass unchanged (143/143).
Replace the auto-session landing behavior with a resume-focused
overview at /. When returning after a break, the root page now
shows the most recent checkpointed session as a Resume card with
its current objective and last checkpoint summary visible, plus
cards for other recent spaces. New sessions explicitly go through
/sessions/new instead of being created on bare /.
Surface a soft drift hint in the chat header when many turns have
passed since the last checkpoint (turn-count based, not semantic).
Add a Restore action to the checkpoint detail panel as a peer to
Review, so users can act on a checkpoint without leaving the
inspection flow. When review surfaces issues, show an inline
Continue from this checkpoint button so recovery is one click away.
Checkpoints can now hold attached artifacts — text content captured
from chat messages or added manually. Artifacts are included in
prompt context when a checkpoint is active, grounding reasoning in
actual content rather than just summaries. Add capture button on
messages, artifact management in checkpoint modal, and collapsible
artifact display in checkpoint detail.
Separate assumptions from decisions as a first-class checkpoint
field. Add review endpoint that surfaces reasoning consistency
issues: contradictions, hidden assumptions, resolved questions,
and unused entities. Extend draft extraction, prompt context,
and compare diff to include assumptions.
Rename mount/unmount flow to restore/exit restore. Add visual
restore boundary divider in chat timeline. Dim pre-restore turns
to make isolation visually obvious. Show contextual empty state
and one-time hint for restored context.
