Adds the kb-app crate (§7) as the single facade between UI crates
(kb-cli / kb-tui / kb-desktop) and the rest of the workspace. Public
surface mirrors the task spec exactly:
- init_workspace(force) — XDG dir creation + config.toml seed; idempotent
unless force=true. Honors XDG envs and tilde-expands the workspace
root to $HOME/KnowledgeBase.
- doctor() — emits a doctor.v1 report with config_loaded +
data_dir_writable checks; downstream checks land in later phases.
- ingest / list_docs / inspect_doc / inspect_chunk / search / ask —
bail!("not yet wired (P<n>-<i>)") so kb-cli surfaces exit code 2
cleanly per §10.
- AskOpts + DoctorReport + DoctorCheck.
- doctor_signal::{DoctorUnhealthy, RefusalSignal, NoHitSignal} —
signal types the CLI downcasts on for §10 exit-code mapping.
- logging::init() — daily-rolling file appender at
$XDG_STATE_HOME/kb/logs/kb.log, plus stderr-fallback EnvFilter.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
altair823
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