hollowdark - Prose Based Life Simulator

Age	Commit message (Collapse)	Author	Files	Lines
2026-04-22	Migrate remaining relative imports to @hollowdark/*; strip //-comments and ↵	Bobby	1	-8/+0
	doc references, JSDoc-only
2026-04-22	Drop all barrel index.ts files; imports target leaf files directly	Bobby	1	-1/+2

2026-04-22	Switch cross-module imports to @hollowdark/* scoped alias	Bobby	1	-1/+1

2026-04-22	Implement seeded PRNG with deterministic sub-RNG derivation	Bobby	1	-0/+233
	rng/ is the load-bearing primitive for simulation determinism (ARCHITECTURE.md §26). All gameplay randomness routes through createRNG; Math.random is forbidden in gameplay code by ESLint. rng/derive.ts xmur3 string hash + deriveSeed(parentSeed, label), stable across processes and runs rng/seeded.ts SeededRNG interface, mulberry32 implementation, next / nextInt / nextBool / pick / weightedPick / sub rng/index.ts public re-exports Sub-RNG derivation is the key technical move: seeding a child with hash(parent_seed + label) lets NPCs' trajectories be regenerated deterministically from their identity tuple alone — which is how Tier 3 NPCs stay off-disk until the player needs them. 29 determinism tests in tests/determinism/rng.test.ts cover: same seed → same sequence, sub-RNG independence from parent consumption, sub-order matters, input validation, and a byte-level inline snapshot that locks the PRNG output for seed "hollowdark". The snapshot is load-bearing — if mulberry32 or xmur3 changes, every existing save diverges, so treat a snapshot break as a migration concern, not an update-the-snapshot fix.