Self-contained handoff doc for the C.1.5b session. §1 is a copy-paste
startup prompt for a fresh Claude Code session; §2+ is detailed
context (commits shipped in C.1.5a, decision space for the #56 fix
including precompute-per-spawn vs render-thread-side-table options,
EnvCell synthetic-id scheme, walker-class placement options, file
pointers, verification plan).
Slice will resolve issue #56 first (per-part transform handling for
static entities) before adding the EnvCell static-object DefaultScript
walker, per the C.1.5a final reviewer's recommendation that resolving
#56 unblocks slice 2's visual delight gate (the multi-emitter
collapse symptom affects portals, chimneys, and fireplaces alike).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
