Correct big-endian offboard state flag checks

crates/skate-core/src/player/selector/air.rs

@@ -20,7 +20,8 @@ impl StateSelector {
         if p.has_2476(0x8000) {
             return PhysicalStateId::BipedGround;
         }
-        if p.has_2476(0x80) && !p.has_2484(1) {
+        //Native lbz2484 selects the high byte of the big-endian flag word.
+        if p.has_2476(0x80) && !p.has_2484(0x100_0000) {
             return PhysicalStateId::BipedAir;
         }
         if facts.force_known_air {
@@ -72,7 +73,7 @@ impl StateSelector {
         {
             return PhysicalStateId::WipeoutGround;
         }
-        if p.has_2476(0x80) && !p.has_2484(1) {
+        if p.has_2476(0x80) && !p.has_2484(0x100_0000) {
             return PhysicalStateId::BipedAir;
         }
         if p.has_2476(0x8000) {

crates/skate-core/src/player/selector/offboard.rs

@@ -35,7 +35,10 @@ impl StateSelector {
                     return PhysicalStateId::WipeoutGround;
                 }
                 if !p.has_2480(0x10) {
-                    if p.has_2484(1) {
+                    //82D8ADE8's BipedAir branch reads lhz2484, then tests its low bit. On
+                    //big-endian Xenon this is full-word bit16 (Offboard328),
+                    //not bit0 (the unrelated BipedBoardOnGround attribute).
+                    if p.has_2484(0x1_0000) {
                         if p.has_2476(0x8000) || p.has_2476(0x80) {
                             current
                         } else {

crates/skate-game/src/physics/offboard/air_diagnostics.rs

@@ -1,10 +1,11 @@
-//! Bounded numeric history for user-reproduced airborne bails. No per-frame IO.
+//! Bounded numeric history for user-reproduced off-board bails. No per-frame IO.
 use crate::physics::SkaterRuntime;
 use std::collections::VecDeque;
 
 #[derive(Debug)]
 #[allow(dead_code)] // Fields are serialized together only when a bail is requested.
 struct Sample {
+    physical_state: u32,
     tick: i32,
     flags: [u32; 3],
     packet: skate_core::player::offboard::air_prediction::Packet,
@@ -37,6 +38,7 @@ pub(crate) fn record(skater: &mut SkaterRuntime) {
     let p = &skater.player_input.processed;
     if history.samples.len() == 32 { history.samples.pop_front(); }
     history.samples.push_back(Sample {
+        physical_state: p.state_2508,
         tick: state.tick,
         flags: [p.flags_2476, p.flags_2480, p.flags_2484],
         packet: state.packet,
@@ -51,7 +53,7 @@ pub(crate) fn record(skater: &mut SkaterRuntime) {
     if skater.wipeout.state.reasons.iter().any(|&requested| requested) {
         // Format in memory, then one write; never send Debug's individual
         // formatting fragments to the Windows redirected stderr handle.
-        let report = format!("SKATE_BIPED_AIR_BAIL history={:#?}", history.samples);
+        let report = format!("SKATE_BIPED_BAIL history={:#?}", history.samples);
         eprintln!("{report}");
         history.samples.clear();
         history.reports += 1;

crates/skate-game/src/physics/wipeout.rs

@@ -151,6 +151,7 @@ pub(super) fn check_after_physics(
                     ground_kind_356: skater.offboard.retained_contact.kind_164,
                 },
             );
+            super::offboard::air_diagnostics::record(skater);
             Ok(())
         }
         PhysicalStateId::PhysicsAir => skater.wipeout.check_air(&observations, false),

docs/OFFBOARD_STATE_FLAGS.md

@@ -0,0 +1,24 @@
+# Off-board state flag correction
+
+The user reported jumps immediately playing a landing animation, repeated
+landing animations and rising motion after walking off a ledge. The preceding
+run's stderr contained no airborne bail report; this alone does not establish
+whether the airborne state was entered.
+
+Static evidence: TU3 dump `default_82000000_011B0000.bin`, SHA-256
+`f4aa113eb541bfba03dbc108cf5ab43f58c965b20fa3b82f9c40938a0ad841c4`.
+The generated instruction listing for `82D8ADE8` contains:
+
+- `82D8B8D4`: `lhz r11,2484(r4)`, followed by a low-bit test.
+- `82D8B490` and `82D8B5F0`: `lbz r11,2484(r4)`, followed by a low-bit test.
+
+On this big-endian target these test full-word masks `0x00010000` and
+`0x01000000`, respectively. The port incorrectly used `0x00000001` for all
+three. Bit16 is published from Offboard328, the airborne continuation flag;
+bit0 is a separate animation attribute. BipedAir therefore incorrectly returned
+to BipedGround while its airborne flag was still set.
+
+Corrected all three masks. Repeated premature ground entry is a plausible
+cause of the reported animation loop; gameplay confirmation remains with the
+user. Build only, no tests run. Bounded bail diagnostics also cover BipedGround
+so any remaining turning-related failure can be captured.