Reflects the final shape of the ImplantApp pattern after PR #131
review rounds:
- Manifest: schema_version field, default_mode as String, drop
display_name / icon_path (no callers). Documents the tiered
schema_version behavior and the default_mode string-to-enum resolution.
- ImplantApp base class: add register_screen, current_screen_id,
default _on_screen_changed with has_method tolerance + same-screen-
replace detection. Drop the unused insert_deactivated signal;
on_insert_deactivated() default closes if active in INSERT mode.
- Screens paragraph: rewrite to describe subclass-constructs-then-
registers flow; base owns add_child, visibility, enter/leave dispatch.
- Phasing: promote "Lands this PR" to "Landed — Sprint 36 #844 and
review rounds" with concrete surface of the full shipped API
(instantiate_all, get_app_instance, get_resolved_mode, schema_version).
- Review checklist: rewrite as a per-app PR checklist for future apps
entering the pattern (manifest shape, on_install contract, no direct
instantiation in hud.tscn, no KEY_* literals in main.gd).
Draft by Tyre; committed by team lead per the team-lead-commits rule.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>