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Android snapshot occlusion now measures rectangle-union coverage with an event-driven sweep instead of allocating a Cartesian X/Y cell grid.
This keeps exact union semantics, drawing-order policy, the 90% coverage threshold, deterministic work budgets, and cooperative cancellation while allowing broad valid footprints to complete within their existing caps. The geometry now lives in one Android-owned module with oracle-backed tests.
The separate quadratic sibling-candidate scan remains out of scope. No snapshot schema, CLI surface, docs, or skills changed.
Validation
Before the fix, planted regression runs exhausted the original 1,024- and 1,650-work-unit caps. Both cases pass at those same caps after the change.
pnpm check:affected --run passed: 273 test files and 1,845 tests, including provider integration, format, lint, typecheck, layering, Fallow, and build.
Live Android emulator verification at b82669f8 captured Settings through android-helper 0.20.10 with healthy snapshot quality: 118 acquired nodes, 34 presented nodes, and 312 ms helper time. The verification session was closed.
Clean and merge-ready at b82669f8. The event-driven X sweep preserves exact union/intersection semantics and the existing >= 0.9 publication rule while replacing the Cartesian allocation. Focused tests and exact-head live Android evidence are valid; all 27 checks, including Android Smoke, are green, and size growth is only +494 B. Non-blocking residual: active Y intervals are re-sorted per slab, so adversarial staggered inputs are bounded by the cooperative work budget rather than formally linear time.
Preview removed because the pull request was closed.
2026-08-24 05:59 UTC
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thymikee
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Summary
Android snapshot occlusion now measures rectangle-union coverage with an event-driven sweep instead of allocating a Cartesian X/Y cell grid.
This keeps exact union semantics, drawing-order policy, the 90% coverage threshold, deterministic work budgets, and cooperative cancellation while allowing broad valid footprints to complete within their existing caps. The geometry now lives in one Android-owned module with oracle-backed tests.
The separate quadratic sibling-candidate scan remains out of scope. No snapshot schema, CLI surface, docs, or skills changed.
Validation
Before the fix, planted regression runs exhausted the original 1,024- and 1,650-work-unit caps. Both cases pass at those same caps after the change.
pnpm check:affected --runpassed: 273 test files and 1,845 tests, including provider integration, format, lint, typecheck, layering, Fallow, and build.Live Android emulator verification at
b82669f8captured Settings throughandroid-helper0.20.10 with healthy snapshot quality: 118 acquired nodes, 34 presented nodes, and 312 ms helper time. The verification session was closed.