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, but descriptors are not yet the primary runtime route source	LinuxSim hardcoded runtime routing
GTK / uConsole	GtkUConsoleScreenGraphPresenter done in modules/ui_gtk_runtime	GtkRuntimeEntryAdoption done	LinuxUConsoleGtkPageRegistryAdoption exposes descriptor data, but the page registry is not yet descriptor-primary	GTK hardcoded page registry
LVGL	LvglRuntimeScreenGraphPresenter done in modules/ui_lvgl_ux_packs	LvglRuntimeEntryAdoption done	LvglRuntimeAdoptionProbe proves compatibility runtime consumption, but real renderers are not yet descriptor-primary	LVGL hardcoded menu/page creation

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; primary route migration remains.
• GTK presenter: done; entry adoption done; primary page registry migration remains.
• LVGL presenter: done; probe adoption done; primary menu/page renderer 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	deprecated alias headers and legacy alias tests only
KeyVerification	main runtime callers removed; burned down to formal source/sink/session adapter	KeyVerificationPresentationSource, KeyVerificationActionSink, KeyVerificationSessionAdapter in modules/ui_key_verification_runtime	deprecated alias headers and legacy alias tests only
MapOverlay	main runtime callers removed; burned down to stable snapshot/projection adapters	MapOverlaySnapshotSource, MapOverlayProjectionAdapter in modules/ui_map_runtime	deprecated alias headers and legacy alias tests only

Legacy headers are not primary runtime APIs. Their deletion window opens after downstream compatibility includes are gone.

Remaining Fallback

These fallbacks remain intentionally contained:

Fallback	Owner	New path	Exit condition
LinuxSim hardcoded runtime routing	final LinuxSim app shell and historical simulator runtime	LinuxSimRuntimeEntry -> LinuxSimRuntimeEntryAdoptionProbe -> AsciiRuntimeEntryAdoption	AsciiRuntimeEntryAdoption as primary source for simulator routing
GTK hardcoded page registry	final GTK app shell page-registry adoption and historical GTK page registry	LinuxUConsoleGtkPageRegistryAdoption -> GtkRuntimeEntryAdoption -> GtkUConsoleScreenGraphPresenter	GTK page registry consumes descriptors as primary page source
LVGL hardcoded menu/page creation	modules/ui_lvgl_ux_packs compatibility runtime plus device renderers	LvglRuntimeAdoptionProbe -> LvglRuntimeEntryAdoption -> LvglRuntimeScreenGraphPresenter	LVGL compatibility runtime consumes descriptors before creating menu/page objects

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; deprecated aliases only

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

contained fallback with owner and exit condition

Phase 10 Entry Recommendation

First target:

LinuxSim / ASCII primary path

Proposed Phase 10 first cut:

LinuxSim hardcoded runtime routing -> AsciiRuntimeEntryAdoption as primary source

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 the existing simulator fallback can remain visible and testable.

Expected risk:

Low to medium. The risk is output parity and fallback 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.