Add gated FIFA17 Offline Seasons PMA repair

Two client breakages in a row from detouring FUN_180033770 / sub_180033430 /
FUN_1800d73d0: the first cut froze FIFA at the "are both teams ready" prompt,
and the rate-limited rewrite CRASHED it at the same point. Rate limiting fixed
the I/O problem and the crash still happened, so the fault is the detours
themselves, not the logging.

Most likely cause: sub_180033430 is an address Ghidra never functionised, and at
least one of these is reached in a way a 14-byte inline patch cannot survive -
an interior branch target, or a callee taking stack arguments that the 4-register
wrapper silently drops when it tail-calls the original.

What the aborted runs did establish, and it is worth keeping:
  - KIT_SCAN fires for cardtype 7 with subtype 9 selector 2 AND selector 3, so
    BOTH the home and away club scans do run.
  - The FUT club enumerate (teamId 130000) did NOT occur in the crashed run
    before the kit screen, and KIT_DESC never fired at all.
  - KITS_AVAILABLE remains 0.
  - The "ret" value logged by kit_scan is the same constant for every call and
    is not a usable item pointer, so that reading was wrong.

Next attempt must NOT patch this code path. Read the state from outside the
process instead - /proc/PID/mem plus objdump against the live client, which
cannot crash the game because it never writes to it.

openfut-hook/src/fifa17.rs

@@ -159,6 +159,8 @@ unsafe extern "system" fn worker(_: *mut core::ffi::c_void) -> u32 {
     crate::sbc_request_trace::install();
     crate::store_entry::install();
     crate::season_trace::install();
+    crate::season_team_compat::install();
+    crate::offline_seasons_pma::install();
     crate::kit_trace::install();
     0
 }

openfut-hook/src/lib.rs

@@ -20,6 +20,8 @@ mod fifa17_tls;
 mod iat;
 #[cfg(feature = "fifa17")]
 mod kit_trace;
+#[cfg(feature = "fifa17")]
+mod offline_seasons_pma;
 mod patch_mem;
 #[cfg(feature = "fifa17")]
 mod sbc_dispatch;
@@ -30,6 +32,8 @@ mod sbc_request_trace;
 #[cfg(feature = "fifa17")]
 mod sbc_trace;
 #[cfg(feature = "fifa17")]
+mod season_team_compat;
+#[cfg(feature = "fifa17")]
 mod season_trace;
 #[cfg(feature = "fifa17")]
 mod store_entry;

openfut-hook/src/offline_seasons_pma.rs

@@ -0,0 +1,399 @@
+//! FIFA 17 Offline Seasons PMA completion compatibility repair.
+//!
+//! Retail-compatible main-menu Kick Off completes the PMA instructions state by
+//! broadcasting event `1` through the mode-zero child's callback dispatcher. FUT
+//! Offline Seasons reaches the same PMA UI state but its completed drill scenario
+//! broadcasts event `5`, which returns the UI to state `0` and leaves the drill
+//! active. This default-off repair intercepts that shared callback dispatcher and
+//! rewrites only the fully identified Offline Seasons `5` to `1`, then calls the
+//! original dispatcher so every native subscriber observes the working completion.
+
+use core::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+
+use windows_sys::Win32::System::LibraryLoader::GetModuleHandleA;
+
+use crate::sbc_trace::{guarded_u8, guarded_usize, readable_range, validate_cards_build};
+use crate::season_trace::install_detour;
+use crate::write_log;
+
+const ENABLE_ENV: &str = "OPENFUT_FIFA17_OFFLINE_SEASONS_PMA_FIX";
+
+const CALLBACK_DISPATCHER_RVA: usize = 0x07ac_87b0;
+const CALLBACK_DISPATCHER_COPY_LEN: usize = 15;
+const CALLBACK_DISPATCHER_SIGNATURE: [u8; CALLBACK_DISPATCHER_COPY_LEN] = [
+    0x48, 0x89, 0x5c, 0x24, 0x08, 0x48, 0x89, 0x74, 0x24, 0x10, 0x57, 0x48, 0x83, 0xec, 0x20,
+];
+
+const GAMEPLAY_GLOBAL_SLOT_RVA: usize = 0x04bf_b910;
+const CALLBACK_DISPATCHER_VTABLE_RVA: usize = 0x03ae_9ba0;
+const PMA_INSTRUCTIONS_VTABLE_RVA: usize = 0x03af_2750;
+const PMA_INSTRUCTIONS_HANDLER_RVA: usize = 0x07ac_91e0;
+const FREE_ROAM_VTABLE_RVA: usize = 0x03ae_df58;
+const FREE_ROAM_DTOR_RVA: usize = 0x07a5_db70;
+
+const FUT_SECONDARY_LISTENER_VTABLE_RVA: usize = 0x20e9b8;
+const FUT_SELECTED_LISTENER_VTABLE_RVA: usize = 0x20fea8;
+
+const EVENT_COMPLETE_ADVANCE: u32 = 1;
+const EVENT_DRILL_COMPLETE: u32 = 5;
+const PMA_UI_INSTRUCTIONS_STATE: usize = 4;
+const FREE_ROAM_ACTIVE_PMA_STATE: i32 = 9;
+const OFFLINE_SEASONS_MODE_ID: i32 = 21;
+
+static REPAIR_ACTIVE: AtomicBool = AtomicBool::new(false);
+static DISPATCHER_TRAMPOLINE: AtomicUsize = AtomicUsize::new(0);
+static CANDIDATE_REPORTS: AtomicUsize = AtomicUsize::new(0);
+static MAIN_BASE: AtomicUsize = AtomicUsize::new(0);
+static CARDS_BASE: AtomicUsize = AtomicUsize::new(0);
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+enum Decision {
+    Rewrite,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[repr(usize)]
+enum Rejection {
+    None,
+    RepairDisabled,
+    DispatcherClass,
+    InstructionsState,
+    ListenerTopology,
+    FreeRoamClass,
+    FreeRoamState,
+    FreeRoamNotReady,
+    SecondaryListenerClass,
+    SelectedListenerClass,
+    OfflineSeasonsMode,
+}
+
+#[derive(Clone, Copy, Debug)]
+struct DecisionInput {
+    repair_enabled: bool,
+    dispatcher_class: bool,
+    instructions_state: bool,
+    selected_index: Option<i32>,
+    free_roam_class: bool,
+    free_roam_state: Option<i32>,
+    free_roam_ready: Option<i32>,
+    secondary_listener_class: bool,
+    selected_listener_class: bool,
+    selected_mode: Option<i32>,
+}
+
+fn decide(input: DecisionInput) -> Result<Decision, Rejection> {
+    if !input.repair_enabled {
+        return Err(Rejection::RepairDisabled);
+    }
+    if !input.dispatcher_class {
+        return Err(Rejection::DispatcherClass);
+    }
+    if !input.instructions_state {
+        return Err(Rejection::InstructionsState);
+    }
+    if input.selected_index != Some(2) {
+        return Err(Rejection::ListenerTopology);
+    }
+    if !input.free_roam_class {
+        return Err(Rejection::FreeRoamClass);
+    }
+    if input.free_roam_state != Some(FREE_ROAM_ACTIVE_PMA_STATE) {
+        return Err(Rejection::FreeRoamState);
+    }
+    if input.free_roam_ready != Some(1) {
+        return Err(Rejection::FreeRoamNotReady);
+    }
+    if !input.secondary_listener_class {
+        return Err(Rejection::SecondaryListenerClass);
+    }
+    if !input.selected_listener_class {
+        return Err(Rejection::SelectedListenerClass);
+    }
+    if input.selected_mode != Some(OFFLINE_SEASONS_MODE_ID) {
+        return Err(Rejection::OfflineSeasonsMode);
+    }
+    Ok(Decision::Rewrite)
+}
+
+fn enabled(value: Option<&str>) -> bool {
+    value == Some("1")
+}
+
+unsafe fn read_i32(address: usize) -> Option<i32> {
+    readable_range(address, 4).then(|| core::ptr::read_volatile(address as *const i32))
+}
+
+unsafe fn expected_pointer(address: usize, expected: usize) -> bool {
+    guarded_usize(address) == Some(expected)
+}
+
+unsafe fn main_image_matches(base: usize) -> bool {
+    expected_pointer(
+        base + CALLBACK_DISPATCHER_VTABLE_RVA,
+        base + CALLBACK_DISPATCHER_RVA,
+    ) && expected_pointer(
+        base + PMA_INSTRUCTIONS_VTABLE_RVA,
+        base + PMA_INSTRUCTIONS_HANDLER_RVA,
+    ) && expected_pointer(base + FREE_ROAM_VTABLE_RVA, base + FREE_ROAM_DTOR_RVA)
+}
+
+unsafe fn instructions_state_active(dispatcher: usize, main_base: usize) -> bool {
+    let sentinel = match dispatcher.checked_add(8) {
+        Some(value) => value,
+        None => return false,
+    };
+    let mut node = match guarded_usize(sentinel) {
+        Some(value) => value,
+        None => return false,
+    };
+    for _ in 0..8 {
+        if node == sentinel {
+            return false;
+        }
+        let listener = match node
+            .checked_add(0x10)
+            .and_then(|address| guarded_usize(address))
+        {
+            Some(value) if value != 0 => value,
+            _ => return false,
+        };
+        if guarded_usize(listener) == Some(main_base + PMA_INSTRUCTIONS_VTABLE_RVA) {
+            let parent = listener
+                .checked_add(8)
+                .and_then(|address| guarded_usize(address));
+            let machine = parent
+                .and_then(|value| value.checked_add(8))
+                .and_then(|address| guarded_usize(address));
+            let states = machine
+                .and_then(|value| value.checked_add(8))
+                .and_then(|address| guarded_usize(address));
+            let current = machine
+                .and_then(|value| value.checked_add(0x10))
+                .and_then(|address| guarded_usize(address));
+            let state_four = states
+                .and_then(|value| value.checked_add(PMA_UI_INSTRUCTIONS_STATE * 8))
+                .and_then(|address| guarded_usize(address));
+            return current == Some(listener)
+                && state_four == Some(listener)
+                && guarded_u8(listener + 0x18) == Some(0);
+        }
+        node = match guarded_usize(node) {
+            Some(value) => value,
+            None => return false,
+        };
+    }
+    false
+}
+
+unsafe fn snapshot(dispatcher: usize) -> DecisionInput {
+    let main_base = MAIN_BASE.load(Ordering::Acquire);
+    let cards_base = CARDS_BASE.load(Ordering::Acquire);
+    let dispatcher_class =
+        guarded_usize(dispatcher) == Some(main_base + CALLBACK_DISPATCHER_VTABLE_RVA);
+
+    let gameplay_global = guarded_usize(main_base + GAMEPLAY_GLOBAL_SLOT_RVA);
+    let listener_manager = gameplay_global
+        .and_then(|value| value.checked_add(0x58))
+        .and_then(|address| guarded_usize(address));
+    let table = listener_manager.and_then(|value| guarded_usize(value));
+    let selected_index = table
+        .and_then(|value| value.checked_add(0x20))
+        .and_then(|address| read_i32(address));
+    let free_roam = table.and_then(|value| guarded_usize(value));
+    let secondary = table
+        .and_then(|value| value.checked_add(8))
+        .and_then(|address| guarded_usize(address));
+    let selected = match (table, selected_index) {
+        (Some(value), Some(index @ 0..=2)) => value
+            .checked_add(index as usize * 8)
+            .and_then(|address| guarded_usize(address)),
+        _ => None,
+    };
+
+    DecisionInput {
+        repair_enabled: REPAIR_ACTIVE.load(Ordering::Acquire),
+        dispatcher_class,
+        instructions_state: instructions_state_active(dispatcher, main_base),
+        selected_index,
+        free_roam_class: free_roam.and_then(|value| guarded_usize(value))
+            == Some(main_base + FREE_ROAM_VTABLE_RVA),
+        free_roam_state: free_roam
+            .and_then(|value| value.checked_add(0x30))
+            .and_then(|address| read_i32(address)),
+        free_roam_ready: free_roam
+            .and_then(|value| value.checked_add(0x124))
+            .and_then(|address| read_i32(address)),
+        secondary_listener_class: secondary.and_then(|value| guarded_usize(value))
+            == Some(cards_base + FUT_SECONDARY_LISTENER_VTABLE_RVA),
+        selected_listener_class: selected.and_then(|value| guarded_usize(value))
+            == Some(cards_base + FUT_SELECTED_LISTENER_VTABLE_RVA),
+        selected_mode: selected
+            .and_then(|value| value.checked_add(0x18))
+            .and_then(|address| read_i32(address)),
+    }
+}
+
+type DispatcherFn = unsafe extern "system" fn(usize, u32, usize, usize) -> usize;
+
+unsafe extern "system" fn dispatcher_wrapper(
+    dispatcher: usize,
+    event: u32,
+    r8: usize,
+    r9: usize,
+) -> usize {
+    let trampoline = DISPATCHER_TRAMPOLINE.load(Ordering::Acquire);
+    if trampoline == 0 {
+        return 0;
+    }
+    let original: DispatcherFn = core::mem::transmute(trampoline);
+    if event != EVENT_DRILL_COMPLETE {
+        return original(dispatcher, event, r8, r9);
+    }
+
+    let input = snapshot(dispatcher);
+    let decision = decide(input);
+    let rewritten = matches!(decision, Ok(Decision::Rewrite));
+    let forwarded_event = if rewritten {
+        EVENT_COMPLETE_ADVANCE
+    } else {
+        event
+    };
+    let report = CANDIDATE_REPORTS.fetch_add(1, Ordering::Relaxed);
+    if report < 16 {
+        write_log(&format!(
+            "[OpenFUT][OfflineSeasons] PMA completion observed event={event} dispatcher={dispatcher:#x} pma_state4={} selected_index={} selected_mode={} free_roam_state={} ready={} action={} rejection={:?}\n",
+            input.instructions_state,
+            input.selected_index.unwrap_or(-1),
+            input.selected_mode.unwrap_or(-1),
+            input.free_roam_state.unwrap_or(-1),
+            input.free_roam_ready.unwrap_or(-1),
+            if rewritten { "rewrite-5-to-1" } else { "native" },
+            decision.err().unwrap_or(Rejection::None),
+        ));
+    }
+    original(dispatcher, forwarded_event, r8, r9)
+}
+
+unsafe fn worker() {
+    let main_base = GetModuleHandleA(core::ptr::null()) as usize;
+    if main_base == 0 || !main_image_matches(main_base) {
+        write_log("[OpenFUT][OfflineSeasons] main FIFA image mismatch; inactive\n");
+        return;
+    }
+
+    let mut cards_base = 0usize;
+    for _ in 0..600u32 {
+        cards_base = GetModuleHandleA(c"CardsDLL_Win64_retail.dll".as_ptr().cast()) as usize;
+        if cards_base != 0 {
+            break;
+        }
+        std::thread::sleep(std::time::Duration::from_millis(500));
+    }
+    if cards_base == 0 || !validate_cards_build(cards_base) {
+        write_log("[OpenFUT][OfflineSeasons] CardsDLL unavailable/invalid; inactive\n");
+        return;
+    }
+
+    MAIN_BASE.store(main_base, Ordering::Release);
+    CARDS_BASE.store(cards_base, Ordering::Release);
+    if !install_detour(
+        main_base,
+        CALLBACK_DISPATCHER_RVA,
+        "OfflineSeasons_PMA_callback_dispatcher",
+        CALLBACK_DISPATCHER_COPY_LEN,
+        &CALLBACK_DISPATCHER_SIGNATURE,
+        dispatcher_wrapper as *const () as usize,
+        &DISPATCHER_TRAMPOLINE,
+    ) {
+        write_log("[OpenFUT][OfflineSeasons] callback dispatcher hook failed; inactive\n");
+        return;
+    }
+    REPAIR_ACTIVE.store(true, Ordering::Release);
+    write_log("[OpenFUT][OfflineSeasons] PMA completion repair ARMED\n");
+}
+
+pub(crate) fn install() {
+    if !enabled(std::env::var(ENABLE_ENV).ok().as_deref()) {
+        write_log("[OpenFUT][OfflineSeasons] PMA completion repair disabled\n");
+        return;
+    }
+    write_log("[OpenFUT][OfflineSeasons] PMA completion repair requested\n");
+    std::thread::spawn(|| unsafe { worker() });
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn valid_input() -> DecisionInput {
+        DecisionInput {
+            repair_enabled: true,
+            dispatcher_class: true,
+            instructions_state: true,
+            selected_index: Some(2),
+            free_roam_class: true,
+            free_roam_state: Some(9),
+            free_roam_ready: Some(1),
+            secondary_listener_class: true,
+            selected_listener_class: true,
+            selected_mode: Some(21),
+        }
+    }
+
+    #[test]
+    fn feature_is_default_off() {
+        assert!(!enabled(None));
+        assert!(!enabled(Some("0")));
+        assert!(!enabled(Some("true")));
+        assert!(enabled(Some("1")));
+    }
+
+    #[test]
+    fn exact_offline_seasons_evidence_rewrites() {
+        assert_eq!(decide(valid_input()), Ok(Decision::Rewrite));
+    }
+
+    #[test]
+    fn every_runtime_gate_fails_closed() {
+        let cases: &[(Rejection, fn(&mut DecisionInput))] = &[
+            (Rejection::RepairDisabled, |input: &mut DecisionInput| {
+                input.repair_enabled = false
+            }),
+            (Rejection::DispatcherClass, |input: &mut DecisionInput| {
+                input.dispatcher_class = false
+            }),
+            (Rejection::InstructionsState, |input: &mut DecisionInput| {
+                input.instructions_state = false
+            }),
+            (Rejection::ListenerTopology, |input: &mut DecisionInput| {
+                input.selected_index = Some(1)
+            }),
+            (Rejection::FreeRoamClass, |input: &mut DecisionInput| {
+                input.free_roam_class = false
+            }),
+            (Rejection::FreeRoamState, |input: &mut DecisionInput| {
+                input.free_roam_state = Some(10)
+            }),
+            (Rejection::FreeRoamNotReady, |input: &mut DecisionInput| {
+                input.free_roam_ready = Some(0)
+            }),
+            (
+                Rejection::SecondaryListenerClass,
+                |input: &mut DecisionInput| input.secondary_listener_class = false,
+            ),
+            (
+                Rejection::SelectedListenerClass,
+                |input: &mut DecisionInput| input.selected_listener_class = false,
+            ),
+            (
+                Rejection::OfflineSeasonsMode,
+                |input: &mut DecisionInput| input.selected_mode = Some(1),
+            ),
+        ];
+        for &(expected, mutate) in cases {
+            let mut input = valid_input();
+            mutate(&mut input);
+            assert_eq!(decide(input), Err(expected));
+        }
+    }
+}

openfut-hook/src/season_team_compat.rs

@@ -0,0 +1,445 @@
+//! FIFA 17 Offline Seasons game-setup team compatibility candidate.
+//!
+//! `FUT::SeasonsManagerOfflineHelper` first projects the authentic dynamic pair
+//! `[fixture_team, user_team]`. Later, `futSelectTeam::SetupTeamsInfo()` asks
+//! `CardsGameSetupAdapter.GetTeam(side)` while rebuilding its panel state. The
+//! first native reads expose the correct fixture and user teams on distinct GetTeam
+//! sides. A later repeated read of the user-returning side is fed into SetTeam's
+//! inverse side mapping and duplicates the user's XI over the opponent.
+//!
+//! This default-off candidate corrects that source read, not SetTeam or the final
+//! writer. It records the projector pair, requires one native observation of each
+//! team on distinct sides, and permits one correction on the next repeated
+//! user-team read. Missing or conflicting evidence always preserves native behavior.
+
+use core::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+use std::sync::Mutex;
+
+use windows_sys::Win32::System::LibraryLoader::GetModuleHandleA;
+
+use crate::sbc_trace::{readable_range, target_va, validate_cards_build};
+use crate::season_trace::{install_detour, install_detour_reloc, rd_i32};
+use crate::write_log;
+
+const ENABLE_ENV: &str = "OPENFUT_FIFA17_SEASON_TEAM_COMPAT";
+
+const FIXTURE_PROJECTOR_RVA: usize = 0x0fc500;
+const GET_TEAM_RVA: usize = 0x0054a0;
+
+const FIXTURE_PROJECTOR_SIGNATURE: [u8; 19] = [
+    0x40, 0x57, 0x41, 0x54, 0x41, 0x56, 0x48, 0x83, 0xec, 0x30, 0x48, 0xc7, 0x44, 0x24, 0x20, 0xfe,
+    0xff, 0xff, 0xff,
+];
+const GET_TEAM_SIGNATURE: [u8; 17] = [
+    0x48, 0x8b, 0x05, 0xb9, 0x8a, 0x2d, 0x00, 0x4c, 0x8b, 0x80, 0x50, 0x03, 0x00, 0x00, 0x49, 0xff,
+    0xe0,
+];
+
+const UNKNOWN_SIDE: i32 = -1;
+
+static REPAIR_ACTIVE: AtomicBool = AtomicBool::new(false);
+static FIXTURE_PROJECTOR_TRAMPOLINE: AtomicUsize = AtomicUsize::new(0);
+static GET_TEAM_TRAMPOLINE: AtomicUsize = AtomicUsize::new(0);
+static TEAM_STATE: Mutex<TeamState> = Mutex::new(TeamState::empty());
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+struct TeamState {
+    fixture_team: i32,
+    user_team: i32,
+    fixture_get_side: i32,
+    user_get_side: i32,
+    correction_used: bool,
+}
+
+impl TeamState {
+    const fn empty() -> Self {
+        Self {
+            fixture_team: 0,
+            user_team: 0,
+            fixture_get_side: UNKNOWN_SIDE,
+            user_get_side: UNKNOWN_SIDE,
+            correction_used: false,
+        }
+    }
+
+    fn capture(&mut self, fixture_team: i32, user_team: i32) -> bool {
+        if !valid_pair(fixture_team, user_team) {
+            *self = Self::empty();
+            return false;
+        }
+        *self = Self {
+            fixture_team,
+            user_team,
+            fixture_get_side: UNKNOWN_SIDE,
+            user_get_side: UNKNOWN_SIDE,
+            correction_used: false,
+        };
+        true
+    }
+
+    fn observe_get_team(&mut self, side: i32, native_team: i32) -> GetTeamDecision {
+        if !valid_side(side) || !valid_pair(self.fixture_team, self.user_team) {
+            return GetTeamDecision::native(native_team);
+        }
+
+        if native_team == self.fixture_team {
+            if (self.fixture_get_side != UNKNOWN_SIDE && self.fixture_get_side != side)
+                || self.user_get_side == side
+            {
+                return self.clear_on_conflict(native_team);
+            }
+            let first_observation = self.fixture_get_side == UNKNOWN_SIDE;
+            self.fixture_get_side = side;
+            return GetTeamDecision {
+                team: native_team,
+                event: if self.user_get_side != UNKNOWN_SIDE {
+                    DecisionEvent::NativePairConfirmed
+                } else if first_observation {
+                    DecisionEvent::FixtureObserved
+                } else {
+                    DecisionEvent::None
+                },
+            };
+        }
+
+        if native_team == self.user_team {
+            if self.user_get_side == UNKNOWN_SIDE {
+                if self.fixture_get_side == side {
+                    return self.clear_on_conflict(native_team);
+                }
+                self.user_get_side = side;
+                return GetTeamDecision {
+                    team: native_team,
+                    event: if self.fixture_get_side != UNKNOWN_SIDE {
+                        DecisionEvent::NativePairConfirmed
+                    } else {
+                        DecisionEvent::UserObserved
+                    },
+                };
+            }
+            if self.user_get_side != side {
+                return self.clear_on_conflict(native_team);
+            }
+            if !self.correction_used && self.fixture_get_side != UNKNOWN_SIDE {
+                self.correction_used = true;
+                return GetTeamDecision {
+                    team: self.fixture_team,
+                    event: DecisionEvent::Corrected,
+                };
+            }
+        }
+
+        GetTeamDecision::native(native_team)
+    }
+
+    fn clear_on_conflict(&mut self, native_team: i32) -> GetTeamDecision {
+        *self = Self::empty();
+        GetTeamDecision {
+            team: native_team,
+            event: DecisionEvent::ConflictingNativePair,
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+enum DecisionEvent {
+    None,
+    FixtureObserved,
+    UserObserved,
+    NativePairConfirmed,
+    ConflictingNativePair,
+    Corrected,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+struct GetTeamDecision {
+    team: i32,
+    event: DecisionEvent,
+}
+
+impl GetTeamDecision {
+    const fn native(team: i32) -> Self {
+        Self {
+            team,
+            event: DecisionEvent::None,
+        }
+    }
+}
+
+const fn valid_side(side: i32) -> bool {
+    side == 0 || side == 1
+}
+
+const fn valid_pair(fixture_team: i32, user_team: i32) -> bool {
+    fixture_team > 0 && user_team > 0 && fixture_team != user_team
+}
+
+fn enabled(value: Option<&str>) -> bool {
+    value == Some("1")
+}
+
+fn exact_signature(current: &[u8], expected: &[u8]) -> bool {
+    current == expected
+}
+
+unsafe fn target_matches(base: usize, rva: usize, signature: &[u8]) -> bool {
+    let Some(target) = target_va(base, rva) else {
+        return false;
+    };
+    readable_range(target, signature.len())
+        && exact_signature(
+            core::slice::from_raw_parts(target as *const u8, signature.len()),
+            signature,
+        )
+}
+
+type FixtureProjectorFn = unsafe extern "system" fn(usize, usize, usize, usize) -> usize;
+type GetTeamFn = unsafe extern "system" fn(usize, i32) -> i32;
+
+unsafe extern "system" fn fixture_projector_wrapper(
+    context: usize,
+    output_pair: usize,
+    r8: usize,
+    r9: usize,
+) -> usize {
+    let trampoline = FIXTURE_PROJECTOR_TRAMPOLINE.load(Ordering::Acquire);
+    if trampoline == 0 {
+        return 0;
+    }
+    let original: FixtureProjectorFn = core::mem::transmute(trampoline);
+    let result = original(context, output_pair, r8, r9);
+
+    let pair = rd_i32(output_pair).zip(rd_i32(output_pair.saturating_add(4)));
+    let captured = pair.is_some_and(|(fixture_team, user_team)| {
+        TEAM_STATE
+            .lock()
+            .map(|mut state| state.capture(fixture_team, user_team))
+            .unwrap_or(false)
+    });
+    match pair {
+        Some((fixture_team, user_team)) if captured => write_log(&format!(
+            "SEASON_TEAM_COMPAT: fixture captured fixture={fixture_team} user={user_team}\n"
+        )),
+        Some((fixture_team, user_team)) => write_log(&format!(
+            "SEASON_TEAM_COMPAT: invalid fixture pair [{fixture_team},{user_team}]; inactive\n"
+        )),
+        None => {
+            if let Ok(mut state) = TEAM_STATE.lock() {
+                *state = TeamState::empty();
+            }
+            write_log("SEASON_TEAM_COMPAT: unreadable fixture pair; inactive\n");
+        }
+    }
+    result
+}
+
+unsafe extern "system" fn get_team_wrapper(adapter: usize, side: i32) -> i32 {
+    let trampoline = GET_TEAM_TRAMPOLINE.load(Ordering::Acquire);
+    if trampoline == 0 {
+        return 0;
+    }
+    let original: GetTeamFn = core::mem::transmute(trampoline);
+    let native_team = original(adapter, side);
+    if !REPAIR_ACTIVE.load(Ordering::Acquire) {
+        return native_team;
+    }
+
+    let decision = TEAM_STATE
+        .lock()
+        .map(|mut state| state.observe_get_team(side, native_team))
+        .unwrap_or_else(|_| GetTeamDecision::native(native_team));
+    match decision.event {
+        DecisionEvent::FixtureObserved => write_log(&format!(
+            "SEASON_TEAM_COMPAT: fixture observed side={side} team={native_team}\n"
+        )),
+        DecisionEvent::UserObserved => write_log(&format!(
+            "SEASON_TEAM_COMPAT: user observed side={side} team={native_team}\n"
+        )),
+        DecisionEvent::NativePairConfirmed => write_log(&format!(
+            "SEASON_TEAM_COMPAT: native pair confirmed side={side} team={native_team}\n"
+        )),
+        DecisionEvent::ConflictingNativePair => write_log(&format!(
+            "SEASON_TEAM_COMPAT: conflicting native pair at side={side}; state cleared\n"
+        )),
+        DecisionEvent::Corrected => write_log(&format!(
+            "SEASON_TEAM_COMPAT: corrected GetTeam side={side} native={native_team} fixture={}\n",
+            decision.team
+        )),
+        DecisionEvent::None => {}
+    }
+    decision.team
+}
+
+unsafe fn worker() {
+    let mut base = 0usize;
+    for _ in 0..600u32 {
+        base = GetModuleHandleA(c"CardsDLL_Win64_retail.dll".as_ptr().cast()) as usize;
+        if base != 0 {
+            break;
+        }
+        std::thread::sleep(std::time::Duration::from_millis(500));
+    }
+    if base == 0 || !validate_cards_build(base) {
+        write_log("SEASON_TEAM_COMPAT: CardsDLL unavailable/invalid; inactive\n");
+        return;
+    }
+    if !target_matches(base, FIXTURE_PROJECTOR_RVA, &FIXTURE_PROJECTOR_SIGNATURE)
+        || !target_matches(base, GET_TEAM_RVA, &GET_TEAM_SIGNATURE)
+    {
+        write_log("SEASON_TEAM_COMPAT: target signature mismatch; inactive\n");
+        return;
+    }
+
+    if !install_detour(
+        base,
+        FIXTURE_PROJECTOR_RVA,
+        "OfflineSeason_fixture_projector",
+        FIXTURE_PROJECTOR_SIGNATURE.len(),
+        &FIXTURE_PROJECTOR_SIGNATURE,
+        fixture_projector_wrapper as *const () as usize,
+        &FIXTURE_PROJECTOR_TRAMPOLINE,
+    ) {
+        write_log("SEASON_TEAM_COMPAT: fixture projector hook failed; inactive\n");
+        return;
+    }
+    if !install_detour_reloc(
+        base,
+        GET_TEAM_RVA,
+        "CardsGameSetupAdapter_GetTeam",
+        GET_TEAM_SIGNATURE.len(),
+        &GET_TEAM_SIGNATURE,
+        3,
+        7,
+        get_team_wrapper as *const () as usize,
+        &GET_TEAM_TRAMPOLINE,
+    ) {
+        write_log("SEASON_TEAM_COMPAT: GetTeam hook failed; inactive\n");
+        return;
+    }
+
+    REPAIR_ACTIVE.store(true, Ordering::Release);
+    write_log("SEASON_TEAM_COMPAT: candidate ARMED; exact fixture evidence gate enabled\n");
+}
+
+pub(crate) fn install() {
+    if !enabled(std::env::var(ENABLE_ENV).ok().as_deref()) {
+        write_log("SEASON_TEAM_COMPAT: disabled\n");
+        return;
+    }
+    write_log("SEASON_TEAM_COMPAT: requested; deferred signature validation starting\n");
+    std::thread::spawn(|| unsafe { worker() });
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn feature_is_default_off() {
+        assert!(!enabled(None));
+        assert!(!enabled(Some("0")));
+        assert!(!enabled(Some("true")));
+        assert!(enabled(Some("1")));
+    }
+
+    #[test]
+    fn signature_validation_is_exact() {
+        assert!(exact_signature(&GET_TEAM_SIGNATURE, &GET_TEAM_SIGNATURE));
+        let mut changed = GET_TEAM_SIGNATURE;
+        changed[0] ^= 1;
+        assert!(!exact_signature(&changed, &GET_TEAM_SIGNATURE));
+    }
+
+    #[test]
+    fn invalid_fixture_never_arms_state() {
+        let mut state = TeamState::empty();
+        assert!(!state.capture(0, 130000));
+        assert!(!state.capture(73, 73));
+        assert_eq!(
+            state.observe_get_team(0, 130000),
+            GetTeamDecision::native(130000)
+        );
+    }
+
+    #[test]
+    fn fixture_must_be_observed_natively_before_correction() {
+        let mut state = TeamState::empty();
+        assert!(state.capture(73, 130000));
+        assert_eq!(
+            state.observe_get_team(1, 130000),
+            GetTeamDecision {
+                team: 130000,
+                event: DecisionEvent::UserObserved
+            }
+        );
+        assert_eq!(
+            state.observe_get_team(1, 130000),
+            GetTeamDecision::native(130000)
+        );
+        assert_eq!(state.fixture_get_side, UNKNOWN_SIDE);
+        assert!(!state.correction_used);
+    }
+
+    #[test]
+    fn correction_requires_native_pair_then_is_one_shot() {
+        let mut state = TeamState::empty();
+        assert!(state.capture(73, 130000));
+        assert_eq!(
+            state.observe_get_team(0, 73),
+            GetTeamDecision {
+                team: 73,
+                event: DecisionEvent::FixtureObserved
+            }
+        );
+        assert_eq!(
+            state.observe_get_team(1, 130000),
+            GetTeamDecision {
+                team: 130000,
+                event: DecisionEvent::NativePairConfirmed
+            }
+        );
+        assert_eq!(
+            state.observe_get_team(1, 130000),
+            GetTeamDecision {
+                team: 73,
+                event: DecisionEvent::Corrected
+            }
+        );
+        assert_eq!(
+            state.observe_get_team(1, 130000),
+            GetTeamDecision::native(130000)
+        );
+    }
+
+    #[test]
+    fn second_fixture_replaces_all_prior_state() {
+        let mut state = TeamState::empty();
+        assert!(state.capture(73, 130000));
+        assert_eq!(state.observe_get_team(0, 73).team, 73);
+        assert_eq!(state.observe_get_team(1, 130000).team, 130000);
+        assert_eq!(state.observe_get_team(1, 130000).team, 73);
+
+        assert!(state.capture(240, 130000));
+        assert_eq!(state.fixture_get_side, UNKNOWN_SIDE);
+        assert_eq!(state.user_get_side, UNKNOWN_SIDE);
+        assert!(!state.correction_used);
+        assert_eq!(state.observe_get_team(0, 240).team, 240);
+        assert_eq!(state.observe_get_team(1, 130000).team, 130000);
+        assert_eq!(state.observe_get_team(1, 130000).team, 240);
+    }
+
+    #[test]
+    fn conflicting_fixture_sides_fail_closed() {
+        let mut state = TeamState::empty();
+        assert!(state.capture(73, 130000));
+        assert_eq!(
+            state.observe_get_team(0, 73).event,
+            DecisionEvent::FixtureObserved
+        );
+        assert_eq!(
+            state.observe_get_team(1, 73).event,
+            DecisionEvent::ConflictingNativePair
+        );
+        assert_eq!(state, TeamState::empty());
+    }
+}

src/config.rs

@@ -274,12 +274,57 @@ impl LauncherConfig {
             .join("config.json")
     }
 
+    /// Parse a config body, tolerating a leading UTF-8 BOM.
+    ///
+    /// Windows text editors and PowerShell's `Set-Content -Encoding UTF8` both
+    /// prepend `EF BB BF`, and `serde_json` rejects it. Kept separate from
+    /// [`Self::load`] so the BOM behaviour is testable without touching the
+    /// user's real config path.
+    pub fn parse_json(raw: &str) -> Result<Self, serde_json::Error> {
+        serde_json::from_str(raw.trim_start_matches('\u{feff}'))
+    }
+
+    /// Load the saved config.
+    ///
+    /// A MISSING file is first-run and correctly yields defaults. A file that
+    /// exists but does not parse is NOT: silently returning defaults there means
+    /// the launcher comes up pointing at the **production** ports
+    /// (`blaze_main` 42130, `account_sync` 8099) with an empty `game_profile`,
+    /// and the next [`Self::save`] writes that over the user's real settings —
+    /// losing the configuration and silently retargeting the game. That happened
+    /// on 2026-08-23 from nothing worse than a BOM.
+    ///
+    /// So an unparseable config is quarantined rather than overwritten: it is
+    /// renamed next to itself and the error is reported, leaving the operator
+    /// something to recover from.
     pub fn load() -> Self {
         let path = Self::config_path();
-        std::fs::read_to_string(&path)
+        let Ok(raw) = std::fs::read_to_string(&path) else {
-            .ok()
+            return Self::default();
-            .and_then(|s| serde_json::from_str(&s).ok())
+        };
-            .unwrap_or_default()
+        match Self::parse_json(&raw) {
+            Ok(cfg) => cfg,
+            Err(e) => {
+                let stamp = std::time::SystemTime::now()
+                    .duration_since(std::time::UNIX_EPOCH)
+                    .map(|d| d.as_secs())
+                    .unwrap_or(0);
+                let quarantine = path.with_file_name(format!("config.json.corrupt-{stamp}"));
+                let moved = std::fs::rename(&path, &quarantine).is_ok();
+                eprintln!(
+                    "openfut-launcher: {} is not valid JSON ({e}). Falling back to defaults, \
+                     which point at the PRODUCTION ports — check the server settings before \
+                     launching.{}",
+                    path.display(),
+                    if moved {
+                        format!(" Previous file kept at {}.", quarantine.display())
+                    } else {
+                        String::new()
+                    }
+                );
+                Self::default()
+            }
+        }
     }
 
     pub fn save(&self) {
@@ -517,6 +562,52 @@ mod tests {
         assert!(c.ea_hostnames.is_empty());
     }
 
+    /// Regression, 2026-08-23: a config written by PowerShell's
+    /// `Set-Content -Encoding UTF8` carries a UTF-8 BOM. `serde_json` rejected
+    /// it, `load()` silently returned defaults, and the next `save()` wrote
+    /// those defaults over the operator's real settings — replacing the STAGING
+    /// ports with the PRODUCTION ones and emptying `game_profile`, so the
+    /// launcher could no longer start the game and would have pointed it at the
+    /// live service. Parsing must tolerate the BOM.
+    #[test]
+    fn a_bom_prefixed_config_still_parses_and_keeps_its_ports() {
+        let body = r#"{
+            "core_binary":"","bridge_binary":"","core_database_url":"",
+            "core_data_dir":"","core_listen_addr":"","bridge_listen_addr":"",
+            "bridge_captures_dir":"","bridge_core_url":"","bridge_tls_enabled":true,
+            "hook_dll_path":"","fifa_game_dir":"C:\\FIFA 17",
+            "openfut_server_host":"10.10.0.120",
+            "openfut_blaze_redirector_port":42327,
+            "openfut_blaze_main_port":42330,
+            "openfut_account_sync_port":8299
+        }"#;
+        let with_bom = format!("\u{feff}{body}");
+
+        assert!(
+            serde_json::from_str::<LauncherConfig>(&with_bom).is_err(),
+            "precondition: raw serde_json must reject the BOM, else this guards nothing"
+        );
+
+        let c = LauncherConfig::parse_json(&with_bom).expect("BOM must be tolerated");
+        assert_eq!(c.openfut_blaze_redirector_port, 42327);
+        assert_eq!(
+            c.openfut_blaze_main_port, 42330,
+            "must NOT fall back to 42130"
+        );
+        assert_eq!(
+            c.openfut_account_sync_port, 8299,
+            "must NOT fall back to 8099"
+        );
+        assert_eq!(c.fifa_game_dir, "C:\\FIFA 17");
+    }
+
+    /// Genuinely corrupt JSON must stay an error so `load()` quarantines the
+    /// file instead of overwriting it with defaults.
+    #[test]
+    fn a_corrupt_config_is_an_error_not_silent_defaults() {
+        assert!(LauncherConfig::parse_json("{not json").is_err());
+    }
+
     #[test]
     fn a_configured_profile_satisfies_launch_without_a_shell_command() {
         let mut c = LauncherConfig {