trail-mate/docs/audits/PHASE9_FINAL_READINESS_REPORT.md

Phase 9 Final Readiness Report

Scope

Phase 9.6 closes the Phase 9 architecture work. It does not add new presenter, entry adoption, UX pack, renderer, or legacy compatibility layers.

The Phase 9 closeout distinction is:

• Phase 9 proves runtime adoption paths and burns down selected legacy adapters from main runtime ownership.
• Phase 10 makes one adopted path the primary runtime path.

Runtime Adoption

Runtime	Presenter status	Entry adoption status	Real entry status	Remaining fallback
ASCII / LinuxSim	AsciiRuntimeScreenGraphPresenter done in modules/ui_ascii_runtime	AsciiRuntimeEntryAdoption done	LinuxSimRuntimeEntry consumes the adoption probe as the only active renderer source	deleted after LinuxSim/uConsole fallback burn-down
GTK / uConsole	GtkUConsoleScreenGraphPresenter done in modules/ui_gtk_runtime	GtkRuntimeEntryAdoption done	LinuxUConsoleGtkPageRegistryAdoption exposes descriptor data as the only active page-registry source	deleted after LinuxSim/uConsole fallback burn-down
LVGL	LvglRuntimeScreenGraphPresenter done in modules/ui_lvgl_ux_packs	LvglRuntimeEntryAdoption done	LvglPrimaryScreenGraphRuntime consumes descriptor adoption as the only active descriptor-runtime source	deleted after LVGL fallback burn-down

The runtime adoption path is real enough to test:

PresentationBundle -> RuntimeEntryAdoption -> RuntimeScreenGraphPresenter

It is not yet the primary renderer path. That is the Phase 10 boundary.

Readiness summary:

• ASCII presenter: done; entry adoption done; hardcoded runtime fallback deleted.
• GTK presenter: done; entry adoption done; hardcoded page-registry fallback deleted.
• LVGL presenter: done; primary descriptor runtime done; real widget/menu migration remains.

Legacy Burn-down

Surface	Phase 9 status	Stable owner	Remaining compatibility
ChatDelivery	main runtime callers removed; burned down to formal adapters	ChatDeliveryActionPortAdapter, ChatDeliveryEventProjectionAdapter, IChatDeliveryActionPort, IChatDeliveryEventPort in modules/ui_chat_runtime	alias build include surface removed
KeyVerification	main runtime callers removed; burned down to formal source/sink/session adapter	KeyVerificationPresentationSource, KeyVerificationActionSink, KeyVerificationSessionAdapter in modules/ui_key_verification_runtime	alias build include surface removed
MapOverlay	main runtime callers removed; burned down to stable snapshot/projection adapters	MapOverlaySnapshotSource, MapOverlayProjectionAdapter in modules/ui_map_runtime	alias build include surface removed

Legacy headers are not primary runtime APIs. The migrated alias headers have been removed from the active build include surface.

No Remaining Fallback

Current fallback status:

Fallback	Owner	New path	Exit condition
LinuxSim hardcoded runtime routing	final LinuxSim app shell	LinuxSimRuntimeEntry -> LinuxSimRuntimeEntryAdoptionProbe -> AsciiRuntimeEntryAdoption	satisfied; fallback branch deleted
GTK hardcoded page registry	final GTK app shell page-registry adoption	LinuxUConsoleGtkPageRegistryAdoption -> GtkRuntimeEntryAdoption -> GtkUConsoleScreenGraphPresenter	satisfied; fallback branch deleted
LVGL hardcoded menu/page creation	modules/ui_lvgl_ux_packs descriptor runtime	LvglPrimaryScreenGraphRuntime -> LvglRuntimeEntryAdoption -> LvglRuntimeScreenGraphPresenter	satisfied; fallback branch deleted

The fallback ledger remains the authoritative itemized tracker for fallback owner, reason, new path, exit condition, and checker status.

Consistency Baseline

Phase 9 final readiness requires the following documents to agree:

• docs/audits/LEGACY_BURNDOWN_REGISTER.md
• docs/audits/PHASE9_LEGACY_BURNDOWN_REPORT.md
• docs/audits/PHASE9_FALLBACK_CONTAINMENT_LEDGER.md

The shared status for ChatDelivery, KeyVerification, and MapOverlay is:

main runtime callers removed; alias build include surface removed

The shared status for LinuxSim and GTK hardcoded UI paths is:

deleted after LinuxSim/uConsole fallback burn-down

The shared status for the LVGL hardcoded UI path is:

deleted after LVGL fallback burn-down

Phase 10 Entry Recommendation

First target:

LinuxSim / ASCII primary path

Completed Phase 10/11 burn-down follow-up:

LinuxSim hardcoded runtime routing -> AsciiRuntimeEntryAdoption as primary source and unavailable-on-failure for failed adoption.

Why this is the right first cut:

• It avoids real device memory, input, and LVGL layout risk.
• It does not require GTK widget or page-registry replacement.
• It proves the ScreenGraphPresenter path can become primary before touching device renderers.
• Failure cost is low because invalid adoption now fails closed instead of selecting a second UI source.

Expected risk:

Low to medium. The risk is output parity and failed-adoption detection, not device memory pressure, platform widget lifecycle, or board-specific layout behavior.

Phase 9.6 Guardrail

No new Phase 9 work should add runtime ownership under legacy/, introduce a new presenter/adoption layer, or rename remaining fallback as completed primary path migration. Phase 10 starts only when one real runtime path makes the adoption path primary.