research: in-browser runtime Cycle 0
Research phase for browser-native swactor runtime:
- constraints.md: wasm-threads (SharedArrayBuffer), Rust-only actors,
COOP/COEP required, no new modules in src/
- research_synthesis.md: P0-P4 priority ranking, platform dependency
analysis, ecosystem comparison (Lunatic, wasmCloud, Actix)
- 6 feature-stage docs: platform abstraction → single-worker →
multi-worker parallelism → feature parity → transport → DX
- Key decision: SharedArrayBuffer + wasm-threads over postMessage
isolation (swactor's shared-memory architecture demands it)
Authored by Claude, lovingly guided by Zachery Aaron Shores-Chmielewski
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