Centralize navigation dependency decisions for readiness probing and snapshot draining. Replacement actions can reach the owner that cancels the pending request even when earlier observations wait for that load, while exact owner authorization remains mandatory.
Keep retirement admission policy beside publication ownership. Extend coverage for stale owners, cancellation, reused frontend ids, duplicate terminals, and late results without reviving retired notifications or remote objects. The new queue regression fails before the scheduler fix.
Validation: cargo fmt --all; cargo clippy --workspace --all-targets --all-features -- -D warnings; cargo nextest run --no-fail-fast (18833 passed, 16 skipped on the final change set).
Build an operation-local source lookup for batches of rectangle queries and use it in the renderer Range path. Keep tiny batches on direct lookup and retain renderer-specific metric and viewport handling.
Compare batch results for missing sources, display contents, inline continuations, and text ranges. A 516-query fixture reduces box visits from 33024 to 64 without retaining an index.
Validation: cargo fmt --all; cargo clippy --workspace --all-targets --all-features -- -D warnings; cargo nextest run --no-fail-fast (18833 passed, 16 skipped on the final change set).
Cache getters on the existing Event intrinsic and select field projection callbacks once. Preserve own descriptors, optional fields, private backing, and per-realm function identity while moving generic projection policy out of Navigation.
Validation: cargo fmt --all; cargo clippy --workspace --all-targets --all-features -- -D warnings; cargo nextest run --no-fail-fast (18833 passed, 16 skipped on the final change set).
ldm0