Connect difficulty-dependent native spline acquisition and airborne grind adjustment

docs/grind-native-assist.md

@@ -1,59 +1,15 @@
-# Native grind assist port status
+# Native grind assist
 
-The live game now supports paired-truck50-50 and centre-deck boardslide contacts
-(see boardslide-port.md). The new
-`skate-core/src/air/trajectory/grind.rs` leaves are not connected to gameplay.
-They must not be presented as working magnetic assistance or all-grind support.
+The live acquisition and airborne board-adjustment path is now connected.
+See [difficulty and integration details](grind-magnetism-difficulty.md) and
+[grind families](grind-families.md).
+
+Core trajectory leaves82D6A398/82D6A168/82D6A840 are supplied with the real spline
+collection and indexed collision investigation. Accepted targets pass through
+selector scoring and KnownAir into GrindAirAdjust82D712E0. Difficulty uses the
+stock physics_mode80 field, not a new snapping radius.
 
 Reference: TU3 image SHA256
 f4aa113eb541bfba03dbc108cf5ab43f58c965b20fa3b82f9c40938a0ad841c4,
-generated PPC in the local Skate3Research/Skate3CustomEngineLayer checkout.
-No reference process or gameplay tests were run for this port.
-
-## Ported leaves
-
-- 82D60C80/82D60B98: quadratic trajectory-plane intersection and later-root selection.
-- 82D6A398: projected rail trajectory candidate, signed endpoint interval,
-  radius plus GrindOffset plane, miss distance, crossing time, fixed60Hz frame,
-  rail direction and approach direction.
-- 8296EC98/82E09C80: oriented approach angle and fractional-turn fold.
-- 82D6A168: height/angle ranking inside the difficulty lock distance and
-  distance fallback outside it; removing one winner preserves retry order.
-- Admission/displacement portion of82D6A840: relative height, vertical rail,
-  perpendicular speed, ledge-side lock scalars, deck-tip allowance and maximum
-  trajectory angle. It requires a supplied native surface result; no dummy
-  classification or unconditional snap is provided.
-
-These are static source translations, not a claim of verified bitwise parity.
-The core crate builds. The user has reserved gameplay testing for themselves.
-
-## Missing live dependencies
-
-1. Preserve the complete indexed world-query result set for82C20728/82C20C08,
-   then implement the rail/edge/ledge classification82C21930. The existing
-   ground hang-up adapter only produces the fields that its ground caller reads.
-2. Complete82D6A840's accepted-target publication and82D6AF58 landing-normal
-   construction. Feed the real result through trajectory scoring/second-pass
-   selection instead of the current WorldWithoutGrindEdges marker.
-3. Connect GrindAirAdjust82D712E0 and its projection, target, and correction
-   owners to the physical skeleton/board. The displacement leaf by itself is
-   not the complete airborne assist.
-4. Port the other contact probes/scorers and state owners. Native manager
-   82D875A8 uses separate centre-deck, inverted-deck, truck and tip probes.
-   State400 boardslide,40150-50,402 tipslide,4035-0,404 backslash and405
-   darkslide are distinct physics states. Naming variants requires the actual
-   chromosome producer as well as those state IDs.
-
-## Proposed read-only reference trace
-
-A reference run was authorized and launched, but its controller backend did
-not expose the physical controller. The user requested continuation from code.
-No successful reference grind capture was obtained and no synthetic gameplay
-input was sent.
-
-Capture query inputs and indexed hit validity/fraction/position/normal/surface
-at82C20728 and82C20C08, the classification at82C21930, ranked candidates and
-accepted/rejected attempts at82D6A168/82D6A840, and GrindAirAdjust output at
-82D712E0. Include state/category, mode, simulation tick, spline ID, board frame
-and controller inputs so these observations can be matched to their callers.
-Keep the trace local and do not modify the reference binaries or database.
+matching local Skate3CustomEngineLayer generated PPC. Static source translation
+and compilation only; gameplay validation is reserved for the user.