docs(A.5 T27): spec + plan amendments for T22.5 + ship
Spec (2026-05-09-phase-a5-two-tier-streaming-design.md):
- §2 acceptance metrics reshaped from absolute 240 FPS to
refresh-rate-relative + per-preset (95th-pct ≤ 1000ms/refresh
standstill; ≤ 1.5× walking) to match the Quality Preset reality.
- New §4.10 Quality Preset System (T22.5): enum Low/Medium/High/Ultra,
QualitySettings schema, canonical preset values table, env-var
override table, wiring notes (GameWindow.OnLoad + ReapplyQualityPreset),
MSAA mid-session unsupported caveat, file list, test count (12).
- New §11 What was deferred: 8 items (Tier 1 cache, lifestone, JobKind
plumbing, Tier 2/3, ToEntries alloc, InvalidateEntity wiring, High
preset retest). Former §11 References renumbered to §12.
Plan (2026-05-09-phase-a5-two-tier-streaming.md):
- New Task 22.5 section inserted between T22 and T23: full inline spec
with schema, preset table, env-var list, wiring steps, acceptance
criteria, deferred items, commit SHAs. Includes file-name corrections
(SettingsState → DisplaySettings, DisplayTab → SettingsPanel).
- Self-review cross-check table: new §4.10 row pointing at T22.5.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
a28a5b7583