Designs track-2 lifecycle and persistence end-to-end: per-command
write-through to db+yaml+csv+history.log gated by the combined db
persistence logic with commit-db-last ordering; existence-only load
with explicit rebuild command; --resume CLI flag backed by
<data-root>/last_project; in-TUI list-with-browse picker; lock file
for single-instance enforcement; fatal-banner-then-quit failure
model (with --resume making restart cheap); fatal CSV row-load
errors with full diagnosis; YYYYMMDD-word-word-word temp naming
with display-name prettifier; collision-checked names for both
temp and user-supplied projects. Project name lives only on the
filesystem (not duplicated in YAML). ADR-0004 and ADR-0007 amended
in place. requirements.md and CLAUDE.md updated; OOS-6 (global
rolling history) tracked as deferred.
Captures up-front design decisions for RDBMS Playground:
stack (Rust + Ratatui + SQLite), input modes, project file
format, type vocabulary, undo snapshots and replay log,
sharing/export, and testing approach. ADR-0000 establishes
the ADR practice itself and mandates index upkeep alongside
any ADR change.