kindling CLI: daemon-backed commands ignore the --db routing hint #139

Severity: medium · Confidence: medium · Triage: contract-mismatch
APS: KINTEG-012 (plans/modules/06-downstream-integration-surface.aps.md)
Source: clawpatch/codex review of main, 2026-06-26. Deferred from #127; best scoped with the read/query API (KINTEG-003).

Where

crates/kindling/src/lib.rs — build_client (~L188). Coverage gap in crates/kindling/tests/daemon.rs.

Problem

build_client is documented to honour --db as a socket-routing project hint, but the implementation accepts no DB argument and always constructs a default client. Daemon coverage only exercises --via-daemon log (no --db); the only --via-daemon + --db test is for import rejection. So daemon-backed commands given an explicit --db are silently routed by process cwd / the default client instead of the user-named database — potentially reading from or writing to a different project DB than the invocation names.

Recommendation

Thread the resolved common --db value into daemon-backed client construction and translate it into the daemon routing/project hint the API contract promises — or reject --via-daemon with --db for all affected commands with a clear error. Add a daemon test exercising --via-daemon <cmd> --db <path> that asserts routing to the named project (or a clean rejection).