f6fa1ea42d
Two gaps found via audit against Shipyard's source: 1. Stage 6/7 still said "this agent does not exist yet" and told a driving session to treat any lane reaching those stages as blocked — stale since E3 shipped qc-local + senior-gate-reviewer. Replaced with an unconditional launch plus a one-time "ccam lanes agents install" preflight note in Setup. 2. Stage 12's conflict-resolution path called `ccam lanes sync-base` directly on any CONFLICTING PR, with no check that the PR's base is actually `development` first. Shipyard's original has this guard (its own "legacy main-based PR" case) — ported here in general form: never auto-merge into a PR whose base drifted from `development`.