docs: add WEP for reactive signals (push-pull algorithm)#769
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…free, batching) The reactive system section in spec.md only described the API surface (source/derived/observe) but left the internal algorithm unspecified. Add detailed documentation covering: - Push-pull two-phase update model (dirty flag propagation + lazy re-evaluation) - Static dependency analysis as a deliberate design choice (with over-subscription trade-off) - Glitch-free guarantee via phase separation - Equality check (Eq-based change propagation cut-off) - Batching semantics for CLI vs event-looped worlds - Explicit batch() API for CLI world https://claude.ai/code/session_01RDhjhSgkX6NkwqFzAt7ExJ
Move the full reactive system design from spec.md into wep-2026-04-04-reactive-signals.md. The spec now contains a brief summary with a link to the WEP and a note that the feature is not yet implemented. https://claude.ai/code/session_01RDhjhSgkX6NkwqFzAt7ExJ
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Summary
spec.mdinto a dedicated WEP (wep-2026-04-04-reactive-signals.md)Motivation
The reactive system section in spec.md described the API surface (source/derived/observe) but left the internal algorithm unspecified. After reviewing Willy Brauner's article on push-pull reactive signals, several gaps were identified:
Test plan
https://claude.ai/code/session_01RDhjhSgkX6NkwqFzAt7ExJ