acdream/docs
Erik 89cf1e66d0 fix(physics): guard the world-frame agreement proven unreachable by measurement
Closes #283 (plan S3) - as UNREACHABLE, not by restructuring ownership.

acdream has two owners that convert a landblock-local network origin into the
streamed world frame: LiveWorldOriginState for presentation/streaming, and
RuntimePhysicsState.TryGetWorldFrameOffset for placement. They rebase on
different edges - Runtime the instant an accepted Position carries
TeleportAdvanced, App only once StreamingOriginRecenterCoordinator observes
old-window retirement completion, many frames later. A one-landblock
disagreement places an entity 192 m from the geometry around it: the same
failure family as the zero-offset bug 670f307c fixed, with a wrong origin
instead of a missing one.

The plan's first step was to prove or disprove reachability BEFORE moving
ownership, because a restructure on a hypothesis is churn. The probe added in
898ff18b answered it: a connected Release session recorded ZERO disagreements
across 11 completed reveals and six destination landblocks (0x0904, 0x1134,
0x3032, 0x8763, 0xA9B4, 0xF682) spanning roughly 45 km. A gap of even one
frame would have printed an offset in the tens of thousands of metres.

Cause of the safety: BeginOriginRecenter detaches EVERY resident landblock
before the new origin is adopted, so the two rebases are serialized and no
conversion can observe the gap. Ownership is therefore left exactly as it is.

What lands instead is the invariant that keeps it true.
LiveWorldOriginState.EnsureAgreesWithRuntimeFrame is checked at the
landblock->world conversion and is terminal on disagreement, converting a
silent 192 m-multiple misplacement into a loud failure with the offset in
metres and the landblock being projected. Six focused tests pin it, including
the cross-world portal case (0x09 -> 0xF6 = 45,504 m). Disagreement can no
longer reach the probe, so ACDREAM_PROBE_WORLD_FRAME now emits a verbose
per-conversion agreement trace - useful when a placement looks displaced for
some reason OTHER than a frame disagreement.

Complete Release solution: 10,844 passed / 4 skipped / 0 failed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-03 14:33:46 +02:00
..
architecture fix(vfx): resolve an entity's cell through one owner so effects follow it 2026-08-03 14:02:03 +02:00
audit docs: update audit — Sprint 1 items verified (sequence counters + scenery LCG) 2026-04-13 13:51:39 +02:00
plans docs: file #282-#284 and plan the recent-regression cleanup 2026-08-03 13:44:04 +02:00
reference docs(reference): preserve local ACE command catalog 2026-07-27 00:03:58 +02:00
reports docs: the overnight consolidation report, open questions first 2026-07-29 03:54:43 +02:00
research docs: hand off placement campaign finish 2026-08-03 12:54:47 +02:00
superpowers fix(world): remove non-retail portal exit fade 2026-07-15 23:20:52 +02:00
bugs.md docs: reconcile project status and navigation 2026-07-20 13:00:41 +02:00
ISSUES.md fix(physics): guard the world-frame agreement proven unreachable by measurement 2026-08-03 14:33:46 +02:00
README.md docs: reconcile project state and refresh README 2026-07-27 12:53:31 +02:00

acdream documentation map

This page is the entry point for project documentation. It distinguishes current sources of truth from implementation history so an old plan or issue banner cannot silently override the current program state.

Current snapshot — 2026-07-27

  • Milestone state: M3, “Cast a spell,” landed 2026-07-21. M4, “Live in the world,” is active.
  • M4 gameplay program: resume the pre-M4 world-interaction completion program. Favorite-spell overflow, status Use/Assess, and the complete assessment surface are user-accepted. Equipped-child picking and vendor browse/transactions remain Slices 46.
  • Structural/runtime state: all eight GameWindow decomposition slices, Modern Runtime Slices AJ, and the connected visual/lifecycle gates are complete. GameWindow is a 1,622-line composition/callback shell. AcDream.Runtime.GameRuntime owns canonical session, entity/object, gameplay, movement, physics, projectile, environment, and portal state; graphical and no-window hosts borrow the same owner graph.
  • Headless state: Slice K is complete. AcDream.Headless is a presentation-free Windows/Linux host with deterministic commands/events, shared immutable content, multi-session isolation, reconnect, resource telemetry, and 1/5/10/30-session gates. The final two-account native-Linux soak completed ten minutes, logged out through ACE, and converged every ownership ledger.
  • Linux graphical state: Slice L0 and the L1 implementation checkpoint are complete at 66f114b2 and 11501d52. Native Windows passes the active modern-GL/audio/window smoke. WSLg X11/Wayland correctly reject their missing GL_ARB_bindless_texture. Physical-Linux validation and L2L6 are explicitly deferred; resume at the supported AMD/NVIDIA L1 gate.
  • Completed gameplay gates: R6 locomotion/collision/projectile/teleport/ radar, two-client portal-out/materialization, indoor prepared collision, loot ordering, local/remote ground drops, and selection-marker lifetime.
  • Separate visual verification: issue #225, the shared-alpha lifestone/particle result; its connected resource-lifetime and performance routes pass.
  • Carried behaviour debt: issue #153 (far teleport onto an unstreamed edge), #116 (narrowed slide response), #235 (capped/RDP jump cadence), and the active temporary-stopgap rows in the divergence register.
  • Divergence audit: 189 active rows — IA 18, AD 38, AP 91, TS 38, and UN 4 — plus retained struck/retired historical rows such as TS-37.
  • Latest automated baseline: the Release build succeeds with the 17 test-project warnings tracked by issue #228; 8,826 tests pass and five are intentionally skipped. App passes 3,763 / 3 skips. The L1 Windows supported smoke and WSLg X11/Wayland negative-capability reports all end with zero window/GL/input/audio ownership.

Sources of truth

Read these in this order when deciding what to do next:

  1. plans/2026-05-12-milestones.md — the active playable outcome, freeze boundaries, and visual gates.
  2. plans/2026-04-11-roadmap.md — strategic phase ledger: shipped, active, deferred, and future work.
  3. ISSUES.md — tactical defects and small follow-ups. The status inside an issue is authoritative; physical order is not.
  4. architecture/retail-divergence-register.md — every known place runtime behavior can differ from retail.
  5. architecture/acdream-architecture.md and architecture/code-structure.md — ownership, dependency, update-thread, and extraction rules.
  6. architecture/worldbuilder-inventory.md — rendering/DAT code already owned in-tree versus mechanisms still ours to port.

If these disagree, milestones control the current outcome, the roadmap controls work ordering, the issue status controls the individual defect, and the architecture documents control implementation shape. Reconcile the stale document in the same change; do not leave both claims standing.

Research and implementation records

  • research/named-retail/ is the primary retail oracle: named pseudo-C, headers, symbols, and types from the Sept 2013 build.
  • research/decompiled/ is the older Ghidra fallback.
  • research/ contains focused pseudocode, traces, fixtures, and gate reports. A dated research note records evidence; it does not become a new roadmap.
  • superpowers/specs/ and superpowers/plans/ are per-slice design and execution records. Completed plans remain historical.
  • audit/ contains completion and conformance audits.
  • reference/ace-commands.md preserves the local ACE server's complete in-game command catalog and points to the authoritative per-command help surface.

Durable memory

  • ../claude-memory/MEMORY.md indexes the live subsystem memories and the render/physics digests. Read a domain digest before changing that subsystem, especially its DO-NOT-RETRY table.
  • ../memory/ contains stable engineering references such as the modern rendering pipeline, two-tier streaming, and toolchain notes.

Memory accelerates recall; it does not outrank the canonical documents above. When current truth changes, update the relevant canonical document and distill only the durable lesson into memory.

Historical and deprecated documents

  • bugs.md is the April 2026 bug snapshot. It is preserved for archaeology and is not an active ledger.
  • Dated plans and specs describe the decision at that time. Their completion wording is historical unless the current milestone/roadmap explicitly links the item as active.
  • Old R1→R8 architecture sequencing is superseded. Current execution comes from the milestones and strategic roadmap.

Documentation maintenance rules

  • Update milestone, roadmap, issue, divergence, architecture, and memory claims in the same commit when a shipped change affects them.
  • Keep one issue ID per defect. Narrow an issue in place; do not reuse another issue's number as a shorthand.
  • Mark automated, connected, and visual gates separately. An automated pass is not a visual acceptance, and an RDP throughput sample is not a local-display visual comparison.
  • Preserve research history, but remove stale “current/next” claims from living documents once the state advances.