New pkg/lifecycle/mode.go introduces AppMode (Manager | Worker) and
DetectMode() that returns:
- Manager by default (explicit or empty env)
- Worker when CORE_APP_MODE=worker, or when empty env + CI=true signals
a headless/compute context
Prerequisite for the BugSETI compute worker pattern (core/gui RFC.md §9.1) —
manager GUI runs the full app UI, workers run headless compute with only an
RPC surface.
Tests follow the core/go {Good,Bad,Ugly} naming convention; go test
./pkg/lifecycle/... passes.
Co-authored-by: Codex <noreply@openai.com>
Closes tasks.lthn.sh/view.php?id=32
6e62d4a20c