diff --git a/.github/workflows/contract-ci.yml b/.github/workflows/contract-ci.yml
new file mode 100644
index 000000000..413525957
--- /dev/null
+++ b/.github/workflows/contract-ci.yml
@@ -0,0 +1,42 @@
+name: Contract CI
+
+on:
+  push:
+    paths:
+      - "contract/**"
+      - ".github/workflows/contract-ci.yml"
+  pull_request:
+    paths:
+      - "contract/**"
+      - ".github/workflows/contract-ci.yml"
+
+jobs:
+  build-and-test:
+    name: Build & Test Soroban Contract
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32-unknown-unknown
+
+      - name: Cache cargo registry
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            contract/target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('contract/Cargo.toml') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
+      - name: Build contract (WASM)
+        working-directory: contract
+        run: cargo build --target wasm32-unknown-unknown --release
+
+      - name: Run tests
+        working-directory: contract
+        run: cargo test
diff --git a/contract/Cargo.toml b/contract/Cargo.toml
index 48d7f6b88..d5fe83f51 100644
--- a/contract/Cargo.toml
+++ b/contract/Cargo.toml
@@ -1,6 +1,23 @@
 [package]
-name = "contract"
+name = "skillsync_contract"
 version = "0.1.0"
-edition = "2024"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
 
 [dependencies]
+soroban-sdk = { version = "22.0.0", features = ["alloc"] }
+
+[dev-dependencies]
+soroban-sdk = { version = "22.0.0", features = ["testutils", "alloc"] }
+
+[profile.release]
+opt-level = "z"
+overflow-checks = true
+debug = 0
+strip = "symbols"
+debug-assertions = false
+panic = "abort"
+codegen-units = 1
+lto = true
diff --git a/contract/src/lib.rs b/contract/src/lib.rs
new file mode 100644
index 000000000..820ad0f7d
--- /dev/null
+++ b/contract/src/lib.rs
@@ -0,0 +1,184 @@
+#![no_std]
+
+use soroban_sdk::{contract, contractimpl, contracttype, symbol_short, Address, Env};
+
+// ── Storage Keys ──────────────────────────────────────────────────────────────
+
+#[contracttype]
+pub enum DataKey {
+    Admin,
+    Treasury,
+    PlatformFeeBps,
+    DisputeWindow,
+    Initialized,
+}
+
+// ── Contract ──────────────────────────────────────────────────────────────────
+
+#[contract]
+pub struct SkillSyncContract;
+
+#[contractimpl]
+impl SkillSyncContract {
+    // ── Issue #748: initialize ────────────────────────────────────────────────
+
+    /// Sets up initial contract state. Can only be called once.
+    pub fn initialize(env: Env, admin: Address, treasury: Address) {
+        if env.storage().persistent().has(&DataKey::Initialized) {
+            panic!("already initialized");
+        }
+        admin.require_auth();
+
+        env.storage().persistent().set(&DataKey::Admin, &admin);
+        env.storage().persistent().set(&DataKey::Treasury, &treasury);
+        env.storage().persistent().set(&DataKey::PlatformFeeBps, &0u32);
+        env.storage().persistent().set(&DataKey::DisputeWindow, &1000u32);
+        env.storage().persistent().set(&DataKey::Initialized, &true);
+
+        env.events().publish(
+            (symbol_short!("init"),),
+            (admin, treasury),
+        );
+    }
+
+    // ── Issue #749: platform fee ──────────────────────────────────────────────
+
+    /// Sets the platform fee in basis points (0–1000). Admin only.
+    pub fn set_platform_fee(env: Env, new_fee_bps: u32) {
+        Self::require_admin(&env);
+        assert!(new_fee_bps <= 1000, "fee exceeds 10%");
+        env.storage().persistent().set(&DataKey::PlatformFeeBps, &new_fee_bps);
+        env.events().publish(
+            (symbol_short!("fee_upd"),),
+            new_fee_bps,
+        );
+    }
+
+    /// Returns the current platform fee in basis points.
+    pub fn get_platform_fee(env: Env) -> u32 {
+        env.storage()
+            .persistent()
+            .get(&DataKey::PlatformFeeBps)
+            .unwrap_or(0)
+    }
+
+    // ── Issue #750: treasury wallet ───────────────────────────────────────────
+
+    /// Updates the treasury wallet address. Admin only.
+    pub fn set_treasury(env: Env, new_treasury: Address) {
+        Self::require_admin(&env);
+        env.storage().persistent().set(&DataKey::Treasury, &new_treasury);
+        env.events().publish(
+            (symbol_short!("treas"),),
+            new_treasury,
+        );
+    }
+
+    /// Returns the current treasury wallet address.
+    pub fn get_treasury(env: Env) -> Address {
+        env.storage()
+            .persistent()
+            .get(&DataKey::Treasury)
+            .expect("treasury not set")
+    }
+
+    // ── Issue #751: dispute window ────────────────────────────────────────────
+
+    /// Sets the dispute resolution window in ledgers. Admin only.
+    pub fn set_dispute_window(env: Env, window_ledgers: u32) {
+        Self::require_admin(&env);
+        env.storage().persistent().set(&DataKey::DisputeWindow, &window_ledgers);
+        env.events().publish(
+            (symbol_short!("disp_win"),),
+            window_ledgers,
+        );
+    }
+
+    /// Returns the current dispute window in ledgers (default: 1000).
+    pub fn get_dispute_window(env: Env) -> u32 {
+        env.storage()
+            .persistent()
+            .get(&DataKey::DisputeWindow)
+            .unwrap_or(1000)
+    }
+
+    // ── Helpers ───────────────────────────────────────────────────────────────
+
+    fn require_admin(env: &Env) {
+        let admin: Address = env
+            .storage()
+            .persistent()
+            .get(&DataKey::Admin)
+            .expect("not initialized");
+        admin.require_auth();
+    }
+}
+
+// ── Tests ─────────────────────────────────────────────────────────────────────
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use soroban_sdk::testutils::Address as _;
+    use soroban_sdk::Env;
+
+    fn setup() -> (Env, Address, Address, SkillSyncContractClient<'static>) {
+        let env = Env::default();
+        env.mock_all_auths();
+        let contract_id = env.register(SkillSyncContract, ());
+        let client = SkillSyncContractClient::new(&env, &contract_id);
+        let admin = Address::generate(&env);
+        let treasury = Address::generate(&env);
+        (env, admin, treasury, client)
+    }
+
+    #[test]
+    fn test_initialize() {
+        let (_, admin, treasury, client) = setup();
+        client.initialize(&admin, &treasury);
+        assert_eq!(client.get_treasury(), treasury);
+        assert_eq!(client.get_platform_fee(), 0);
+        assert_eq!(client.get_dispute_window(), 1000);
+    }
+
+    #[test]
+    #[should_panic(expected = "already initialized")]
+    fn test_initialize_once() {
+        let (_, admin, treasury, client) = setup();
+        client.initialize(&admin, &treasury);
+        client.initialize(&admin, &treasury);
+    }
+
+    #[test]
+    fn test_platform_fee() {
+        let (_, admin, treasury, client) = setup();
+        client.initialize(&admin, &treasury);
+        client.set_platform_fee(&250);
+        assert_eq!(client.get_platform_fee(), 250);
+    }
+
+    #[test]
+    #[should_panic(expected = "fee exceeds 10%")]
+    fn test_platform_fee_max() {
+        let (_, admin, treasury, client) = setup();
+        client.initialize(&admin, &treasury);
+        client.set_platform_fee(&1001);
+    }
+
+    #[test]
+    fn test_treasury() {
+        let (env, admin, treasury, client) = setup();
+        client.initialize(&admin, &treasury);
+        let new_treasury = Address::generate(&env);
+        client.set_treasury(&new_treasury);
+        assert_eq!(client.get_treasury(), new_treasury);
+    }
+
+    #[test]
+    fn test_dispute_window() {
+        let (_, admin, treasury, client) = setup();
+        client.initialize(&admin, &treasury);
+        client.set_dispute_window(&2000);
+        assert_eq!(client.get_dispute_window(), 2000);
+    }
+}
diff --git a/contract/src/main.rs b/contract/src/main.rs
deleted file mode 100644
index e7a11a969..000000000
--- a/contract/src/main.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}