docs: Campaign P - physics retail-feel parity plan (P1-P7 + final visual matrix)

User-directed pre-vendor detour from the 2026-07-29 physics audit. Goal:
Retail Movement Parity v1 - zero physics TS rows, no unargued
feel-affecting AP rows, issues #262/#165/#166/#116/#167/#72/#153 closed,
one batched connected visual matrix. Sonnet implements, Opus reviews at
slice boundaries. Roadmap gains the Campaign P entry and records Campaign
N's user-accepted closure; CLAUDE.md current-state pointer updated.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CLAUDE.md

@@ -126,8 +126,13 @@ user-accepted, including exact response flags, independent examination
 window, inscription transaction, complete creature/item/spell reports,
 favorite-spell press/right-click behavior, modern scarab/prismatic formula,
 DAT component icons, foreground stacking, and authored 310 x 400 extent.
-Resume at Slice 4 equipped-child world picking, then vendor browse and
+Slice 4 equipped-child world picking passed its two-client Coldeve gate and
-authoritative transactions.
+was user-accepted 2026-07-29. **Campaign P — physics retail-feel parity
+(`docs/plans/2026-07-29-physics-parity-campaign.md`) is the ACTIVE
+user-directed detour** closing every physics-scope gap from the 2026-07-29
+audit (stat-coupled movement, response-layer edge family, remote residuals,
+entry restrictions/water, #262/#153/#167, ledger). Vendor browsing (Slice 5)
+and authoritative vendor transactions resume after Campaign P closes.
 
 **Modern Runtime/performance status:** Slices A–K of
 `docs/plans/2026-07-24-modern-runtime-architecture.md` are complete. Slice L is

docs/plans/2026-04-11-roadmap.md

@@ -22,8 +22,9 @@ falsification ledger — is [`2026-07-27-vulkan-campaign.md`](2026-07-27-vulkan-
 The user signed the V10 cutover; V11 deleted GL (−27,670 lines) and all
 deferred reruns pass on the GL-free tree.
 
-**Campaign N — retail reliable network transport (ACTIVE, started
+**Campaign N — retail reliable network transport (CLOSED 2026-07-29,
-2026-07-29):** the #260 live-server wedge root-caused to missing packet-loss
+user-accepted; #260 closed — a real wire loss recovered live during the
+acceptance session):** the #260 live-server wedge root-caused to missing packet-loss
 recovery in both directions (no outbound retransmission; inbound ISAAC burned
 in arrival order) — acdream could not survive a single lost UDP packet, and
 loopback gates were structurally blind to it. The campaign ports retail's
@@ -34,6 +35,18 @@ N0–N6 with a permanent loss-injection gate at N5 and a user Coldeve
 endurance session as final acceptance. The plan is
 [`2026-07-29-network-transport-campaign.md`](2026-07-29-network-transport-campaign.md).
 
+**Campaign P — physics retail-feel parity (ACTIVE, started 2026-07-29):**
+user-directed pre-vendor detour closing every physics-scope gap the
+2026-07-29 audit found: stat-coupled movement (burden/stamina/vitae →
+run/jump), the collision response-layer edge family (friction gate,
+PrecipiceSlide, sled, steep-poly chain, #116), remote-object residuals
+(Setup sphere lists, PK bits, #165), world specials (entry restrictions,
+water sink-in), deferred fidelity (#167, #153), the #262 login defect, and
+a ledger pass. Goal: zero physics TS rows, no unargued feel-affecting AP
+rows, one final batched connected visual matrix. Sonnet implements, Opus
+reviews. The plan is
+[`2026-07-29-physics-parity-campaign.md`](2026-07-29-physics-parity-campaign.md).
+
 ---
 
 ## Current program: world interaction completion (M4 prelude)

docs/plans/2026-07-29-physics-parity-campaign.md

@@ -0,0 +1,205 @@
+# Campaign P — Physics Retail-Feel Parity
+
+**Filed:** 2026-07-29. **Directed by the user** as a pre-vendor-management
+detour after the same-day physics/collision retail-fidelity audit. The
+world-interaction program (Slice 5, vendor browsing) resumes when this
+campaign closes.
+
+**Execution model:** Claude drives autonomously slice-to-slice. Sonnet
+subagents implement bounded chunks against this plan's specs; an Opus
+review subagent gates every slice boundary. The only user stops are
+(a) the final batched connected visual matrix, (b) a DO-NOT-RETRY
+conflict, (c) anything destructive. All the CLAUDE.md workflow rules
+apply: grep-named-first → pseudocode → port → conformance test; register
+moves in the same commit; no workarounds.
+
+---
+
+## The parity goal (the autonomy contract)
+
+**"Retail Movement Parity v1"** — the campaign is DONE when all of the
+following are auditable-true:
+
+1. **Zero physics-scope temporary stopgaps.** TS-1, TS-4, TS-5, TS-23,
+   TS-46 retired by porting the retail mechanism. TS-24, TS-35, TS-40
+   either retired or re-classified (IA/AD) with a recorded justification.
+2. **No feel-affecting approximations left unargued.** AP-7 resolved by
+   decoding retail's friction state gate; AP-10 restored to retail's
+   0.1 m water sink-in; AP-25 replaced by the retail effective-skill
+   chain (vitae/enchantment-aware); AP-71 (`check_entry_restrictions`)
+   ported.
+3. **Issue ledger:** #262, #165, #166, #116, #167, #72, #153 closed;
+   the stale "pending visual gate" statuses on #172/#173/#174/#175/#41
+   reconciled (folded into the final matrix below). Explicitly excluded:
+   #235 (user-deferred 2026-07-27) and #256/#257 (lifecycle/memory, not
+   physics feel — separate track).
+4. **Verification:** each port carries decomp citations + conformance
+   tests; `dotnet build` + full Release suite green at every slice
+   commit; one batched connected visual matrix (below) passes at the
+   end, run by the user.
+
+Anything not in this list is out of scope for the campaign — file it,
+don't chase it.
+
+---
+
+## Slices
+
+### P1 — Stat-coupled movement (burden / stamina / vitae) — retires TS-5, AP-25, the burden gap
+
+Today `PlayerWeenie.SetBurden` has zero callers, `CanJump` is always
+true, `JumpStaminaCost` is 0, and pushed run/jump skill is
+attributeBonus + init + ranks only. Retail modulates movement by
+character state continuously.
+
+**Retail anchors (named decomp, verified 2026-07-29):**
+- `ACCWeenieObject::{CanJump 0x0058c400, JumpStaminaCost 0x0058c440, InqJumpVelocity 0x0058c520, InqRunRate 0x0058c560, InqMaxRunRate 0x0058c5a0}` — thin delegations to the qualities DB (pseudo-C ~406512).
+- `CACQualities::{InqMaxRunRate 0x00591b20, CanJump 0x00591b50, JumpStaminaCost 0x00591b90, InqRunRate 0x00592800, InqJumpVelocity 0x00592980, InqLoad 0x0058f130}` (pseudo-C ~412901–413975, ~409756) — the real load/skill/vitae composition. `InqJumpVelocity` ends in `sqrt(GetJumpHeight(...) * 19.6)` (pc 413975).
+- `MovementSystem::{GetRunRate 0x006b0950, GetJumpHeight 0x006b09b0, JumpStaminaCost 0x006b0a40}` (pseudo-C ~695958) — GetJumpHeight readable: `LoadMod(load) * (skill/(skill+1300) * 22.2 + 0.05) * power / scaling`, floor 0.35; JumpStaminaCost readable: `ceil(((power + 0.5) * load) * 8 + 2)` on the arg3==0 branch.
+- `EncumbranceSystem::{EncumbranceCapacity 0x004fcc00, Load 0x004fcc40, LoadMod 0x004fcc70}` (pseudo-C ~256393).
+- Cross-refs: ACE `MovementSystem`/`EncumbranceSystem` C# ports; holtburger if it models load.
+
+**Work:**
+1. Port the full chain into Core (`EncumbranceSystem` + `MovementSystem`
+   statics; `PlayerWeenie` becomes the CACQualities-shaped composition).
+   Where BN x87 mush blocks a branch (GetRunRate body), use Ghidra MCP
+   or the ACE port as the tiebreaker and cite which.
+2. Determine, from `CACQualities::InqRunRate`'s own body, exactly which
+   skill level retail feeds (base vs enchantment/vitae-adjusted) and
+   port THAT — scoped to the run/jump query path only, reading vitae +
+   relevant skill enchantments from the M3 active-effect state. Do not
+   build a general effective-skill engine.
+3. Plumb the inputs from Runtime: burden (EncumbranceVal/capacity from
+   PlayerDescription + property updates), current stamina (vitals),
+   vitae. Extend `RuntimeMovementSkillState` (J4.4 seam) so updates flow
+   mid-session, same as run/jump skill today.
+4. Wire the existing `jump_is_allowed` stamina-refusal branch and the
+   `ReportExhaustion` dual-dispatch gate (R3-W4 seam) to a real
+   consumer, matching retail's refusal/weak-jump behavior.
+5. Conformance tests: formula tables (golden values incl. 800-skill cap,
+   load-mod knees at 100%/200%, stamina cost ceil), gating tests
+   (no-stamina jump refusal), plumbing tests (burden/stamina/vitae
+   changes move the produced rate). Register: delete TS-5 + AP-25 rows,
+   note the retirement in the same commit.
+
+### P2 — Response-layer edge family — retires TS-1, TS-4, AP-7; closes #166, #116
+
+The collision *response* layer (what happens after a hit): ground
+friction, cliff edges, downhill landings, near-perpendicular wall
+slides. One oracle-driven pass; the physics digest's DO-NOT-RETRY table
+binds every subagent here.
+
+**Work (research doc FIRST, then port):**
+1. **AP-7:** decode the state gate on retail's friction block
+   (`calc_friction` region, pseudo-C ~276702-276705) that lets retail
+   use threshold 0.25 without hammering normal locomotion (the reverted
+   L.3c attempt). Ghidra MCP for the x87 branch if BN is garbled.
+2. **TS-1:** port the `EdgeSlide → PrecipiceSlide / CliffSlide` chain
+   (precipice context, steep-plane bookkeeping) replacing our
+   stop-at-edge.
+3. **#166:** port the landing "sled" (Sledding state set/clear sites;
+   the sled friction constants already sit in `calc_friction`).
+4. **TS-4:** replace the Path-6 steep-poly in-place-slide shortcut with
+   retail's `SetCollide → Path-4 → ContactPlane` landing chain, and
+   remove the two BSP-layer `SetSlidingNormal` writes (retail's only
+   in-transition writer is `validate_transition`).
+5. **#116:** the near-perpendicular lateral-slide loss + first-airborne-
+   frame divergence, driven by the existing tick-22760 replay and D4
+   pins.
+6. Apparatus: extend the trajectory-replay tests; capture fixtures
+   before changing behavior. Register: delete TS-1/TS-4/AP-7 rows.
+
+### P3 — Remote-object residuals — retires TS-46, TS-23; closes #165; narrows/retires AD-25
+
+1. **TS-46:** pass the Setup's verbatim sphere LIST into the transition
+   (`CPhysicsObj::transition 0x00512dc0 → init_sphere`) instead of the
+   two-scalar reconstruction, for local player and remotes; derive
+   remote step-up/step-down from the Setup instead of the pinned 0.4 m.
+   Captured-fixture replays must stay green or be re-baselined with
+   evidence.
+2. **AD-25:** align the remote post-resolve with the ported
+   `handle_all_collisions` (grounded-bounce rule) as the player half
+   already did in #182.
+3. **#165:** remotes visibly penetrate walls before stopping — diagnose
+   against the (now Setup-true) sweep; suspect list starts at the
+   catch-up step length vs sweep sub-steps.
+4. **TS-23:** parse PlayerKillerStatus from PlayerDescription/property
+   updates and plumb PK/PKLite/Impenetrable onto local + remote player
+   movers (`OBJECTINFO::init 0x0050cf30` state bits). Non-PK ACE
+   behavior must be provably unchanged.
+
+### P4 — World specials — retires AP-71, AP-10
+
+1. **AP-71:** port the `CObjCell::check_entry_restrictions` gate at the
+   head of `find_env_collisions` (pc:309576) — barred house cells block
+   at the threshold client-side.
+2. **AP-10:** restore retail's 0.1 m water sink-in; while there, verify
+   the water-contact step behavior (`WATER_CONTACT_TS` consumers)
+   against retail and file anything found.
+
+### P5 — Deferred fidelity — closes #167, #153, #72
+
+1. **#167:** decode the two unknown x87 ConstraintManager constants
+   (Ghidra) and port leash arming.
+2. **#153:** the far-teleport arrival onto an unstreamed landblock near
+   a 192 m edge — apparatus first (the issue's own trigger table), then
+   the streaming-gap hold shape ALREADY sketched there (freeze the
+   per-tick resolve until the landblock loads — the async equivalent of
+   retail's synchronous load; this is an AD row, not a workaround, and
+   gets filed as one).
+3. **#72:** close on the R6 evidence (DAT-authored omega ±1.5 rad/s is
+   live; the cdb confirmation ask is obsolete).
+
+### P6 — #262 login run-on-the-spot (live defect)
+
+Probe-instrumented fresh-process login repros (`ACDREAM_PROBE_RESOLVE=1`
++ net probes) against local ACE; the issue's hypothesis list is the
+script. Root cause, fix, regression test. No workarounds (no auto-recall,
+no synthetic position kick). Runs serialized (owns the build tree +
+client).
+
+### P7 — Ledger + camera feel
+
+1. Retire the stale TS-25 row (outbound stance ships via
+   `RawState.CurrentStyle` since #219) and refresh TS-24/TS-35/TS-40
+   classifications.
+2. #115 camera-drag: investigation-only against `CameraManager`
+   constants (AD-37's vector-nlerp vs retail quaternion-slerp is the
+   prime suspect); fix if a concrete divergence falls out, otherwise
+   re-classify with evidence.
+3. Reconcile #172/#173/#174/#175/#41 statuses via the final matrix.
+
+---
+
+## Final batched connected visual matrix (the ONE user gate)
+
+1. Burden >100%: run slows, jump shrinks; ~200%: barely moves/jumps.
+2. Repeated jumps drain stamina; low stamina → weak/refused jump;
+   exhaustion behavior matches retail.
+3. Fresh vitae: movement penalty present.
+4. Walk off a cliff/roof edge: slides over like retail, no dead stop.
+5. Downhill jump landing: sled glide + bounce.
+6. Shallow-angle wall graze: lateral slide preserved.
+7. Packed crowd: spacing + shuffle-out unchanged (regression).
+8. Two-client: remote stops at walls without visible penetration;
+   remote ceiling-jump bounces down immediately (#173); Holtburg portal
+   platform step-up (#172); door Use after jumping (#174); closed-door
+   collision matches the visual door (#175); observed-player blips
+   gone (#41).
+9. Locked/barred house: blocked at the threshold.
+10. Wading: slight retail sink-in.
+11. ~20 fresh logins: no run-on-the-spot.
+12. Regression sweep: walk/run/strafe/turn/jump/stairs/doors/water
+    edges feel unchanged from the accepted R6 baseline.
+
+## Risk notes
+
+- P2 and P3 touch the frozen-adjacent transition internals — every
+  subagent prompt must carry the digest's DO-NOT-RETRY table and the
+  no-workarounds rule; 3 failed attempts on any item = stop and build
+  apparatus, per [[feedback_apparatus_for_physics_bugs]].
+- TS-46 changes the collision capsule of every mover; the captured
+  replay fixtures pin behavior — re-baseline only with a recorded
+  retail argument.
+- P1's enchantment-aware skill read is the scope-creep risk; it is
+  bounded to the run/jump query path by this plan.