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e488ce7 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | # Persistent generative world: status
Updated 2026-08-13. The full design lives in
[`persistent_world_design.md`](persistent_world_design.md): H3 Ref2VA as
the center of a persistent Gaussian world memory with agentic composition,
transactional world updates, history preservation, and a 3D -> H3 -> 3D
loop. Status: **design only, nothing built.**
## What exists today
- The design thesis itself (1,900 lines, argued end to end).
- Building blocks already shipped in this pack that the design assumes:
the v2v source path (`H3 Video Fit`), seam and audio clock discipline,
rolling-window regeneration for long or large work, and the Ref2VA
full-reference prompting contract.
## Not built
Everything stateful: the persistent Gaussian store, world-update
transactions, change detection, local coordinate systems, the
QuerySplat-class lift, and any engine bridge.
## First steps, cheapest first
1. **Single-scene loop probe**: render a scene, lift it to splats, re-render
from a new viewpoint via Ref2VA, and measure what survives (identity,
layout, lighting). One scene, no persistence, answers whether the loop's
core assumption holds.
2. **Confidence plumbing**: cross-run divergence maps and oracle profiles as
per-region confidence, feeding the design's confidence-is-first-class
requirement.
3. **Dependencies from the alpha ledger**: continuation UX and SAM-based
targeting (see `ATOS_ALPHA_STATUS.md`) are the same machinery this
design will lean on for world updates.
## Mechanism unifications (2026-08-14 synthesis)
Three findings from the motion program supply machinery this design was
missing:
- **Per-token noise labels as the world's read/write interface.** Store
per-region confidence in the world memory; express it back to the
model on re-render as partial denoise labels: well-observed regions
arrive nearly finished and are preserved, uncertain regions arrive
noisy and are invented. Confidence-weighted regeneration IS the
transactional update semantics; a label ramp at the boundary is the
handover between known and unknown world. This also resolves the
"lift must not directly replace the world" tension: lift confidence
maps to noise level, the model adjudicates.
- **One world clock.** The positional time axis is physical (frame-
linear), and generation supports arbitrary time origins. Rendered
clips can carry their true world-time origin and become temporally
addressable in the world's coordinate frame instead of each starting
at t=0.
- **The budgeted-run shape generalizes.** Budgeted pieces + a banked,
resumable store + an explicit seam policy + priced pre-run reports:
the rolling window proves the shape over time; spatial tiles and
chained scene atoms are the same shape over space and sequence.
Build them on that skeleton.
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