diff --git a/.gitignore b/.gitignore
index 501b4c311..bfb4b6ec0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,6 +45,8 @@
 
 # Kernel Module Compile Results
 *.mod*
+# But allow Swift module maps
+!module.modulemap
 *.cmd
 .tmp_versions/
 modules.order
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 000000000..f30fe3fa1
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,165 @@
+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "libdogecoin",
+    platforms: [
+        .iOS(.v15),
+        .macOS(.v12)
+    ],
+    products: [
+        // C library only - Swift wrapper lives in DogecoinKit
+        .library(
+            name: "clibdogecoin",
+            targets: ["clibdogecoin"]
+        )
+    ],
+    targets: [
+        // MARK: - C Library Target
+        .target(
+            name: "clibdogecoin",
+            path: ".",
+            exclude: [
+                // Exclude CLI executables (but keep tool.c which has utility functions)
+                "src/cli/such.c",
+                "src/cli/sendtx.c",
+                "src/cli/spvnode.c",
+                // Exclude networking (requires libevent) - networking is done in Swift
+                "src/libevent",
+                "src/net.c",
+                "src/spv.c",
+                "src/rest.c",
+                "src/protocol.c",
+                "src/headersdb_file.c",
+                "src/headersdb.c",
+                // Exclude platform-specific code
+                "src/intel",
+                "src/openenclave",
+                "src/optee",
+                // Exclude benchmarks and tests
+                "src/bench.c",
+                "src/scrypt-sse2.c",
+                "test",
+                // Exclude secp256k1 files that are #included, not compiled separately
+                "src/secp256k1/src/tests.c",
+                "src/secp256k1/src/tests_exhaustive.c",
+                "src/secp256k1/src/bench.c",
+                "src/secp256k1/src/bench_ecmult.c",
+                "src/secp256k1/src/bench_internal.c",
+                "src/secp256k1/src/valgrind_ctime_test.c",
+                "src/secp256k1/src/precompute_ecmult.c",
+                "src/secp256k1/src/precompute_ecmult_gen.c",
+                // Exclude logdb tests
+                "src/logdb/test",
+                // Exclude documentation and examples
+                "doc",
+                "contrib",
+                "depends",
+                // Exclude build artifacts and config
+                "config"
+            ],
+            sources: [
+                // Core dogecoin sources
+                "src/address.c",
+                "src/aes.c",
+                "src/arith_uint256.c",
+                "src/auxpow.c",
+                "src/base58.c",
+                "src/bip32.c",
+                "src/bip39.c",
+                "src/bip44.c",
+                "src/block.c",
+                "src/buffer.c",
+                "src/chacha20.c",
+                "src/chainparams.c",
+                "src/cstr.c",
+                "src/ctaes.c",
+                "src/ecc.c",
+                "src/eckey.c",
+                "src/key.c",
+                "src/koinu.c",
+                "src/map.c",
+                "src/mem.c",
+                "src/moon.c",
+                "src/pow.c",
+                "src/png.c",
+                "src/jpeg.c",
+                "src/qr.c",
+                "src/qrengine.c",
+                "src/random.c",
+                "src/rmd160.c",
+                "src/script.c",
+                "src/scrypt.c",
+                "src/seal.c",
+                "src/serialize.c",
+                "src/sha2.c",
+                "src/sign.c",
+                "src/transaction.c",
+                "src/tx.c",
+                "src/utf8proc.c",
+                // Note: utf8proc_data.c is #included by utf8proc.c, not compiled separately
+                "src/utils.c",
+                "src/validation.c",
+                "src/vector.c",
+                "src/wallet.c",
+                // CLI tool utilities (not the executables)
+                "src/cli/tool.c",
+                // logdb sources
+                "src/logdb/logdb_core.c",
+                "src/logdb/logdb_memdb_llist.c",
+                "src/logdb/logdb_memdb_rbtree.c",
+                "src/logdb/logdb_rec.c",
+                "src/logdb/misc.c",
+                "src/logdb/red_black_tree.c",
+                "src/logdb/stack.c",
+                // secp256k1 - main library file (includes other .h implementations)
+                "src/secp256k1/src/secp256k1.c",
+                // secp256k1 - precomputed tables
+                "src/secp256k1/src/precomputed_ecmult.c",
+                "src/secp256k1/src/precomputed_ecmult_gen.c"
+            ],
+            publicHeadersPath: "include",
+            cSettings: [
+                // Header search paths
+                .headerSearchPath("include"),
+                .headerSearchPath("src/secp256k1"),
+                .headerSearchPath("src/secp256k1/include"),
+                .headerSearchPath("src/secp256k1/src"),
+                .headerSearchPath("src/logdb/include"),
+
+                // secp256k1 configuration - 32-bit field/scalar for maximum compatibility
+                .define("USE_FIELD_10X26", to: "1"),
+                .define("USE_SCALAR_8X32", to: "1"),
+                .define("USE_FIELD_INV_BUILTIN", to: "1"),
+                .define("USE_SCALAR_INV_BUILTIN", to: "1"),
+                .define("ENABLE_MODULE_RECOVERY", to: "1"),
+                .define("ECMULT_WINDOW_SIZE", to: "15"),
+                .define("ECMULT_GEN_PREC_BITS", to: "4"),
+
+                // libdogecoin configuration
+                .define("RANDOM_DEVICE", to: "\"/dev/urandom\""),
+                .define("WITH_WALLET", to: "1"),
+                .define("WITH_LOGDB", to: "1"),
+                .define("PACKAGE_NAME", to: "\"libdogecoin\""),
+                .define("PACKAGE_VERSION", to: "\"0.1.5\""),
+
+                // Disable networking (we'll use Swift networking in DogecoinKit)
+                .define("WITH_NET", to: "0"),
+
+                // Suppress warnings for third-party code and undefine HAVE_CONFIG_H
+                .unsafeFlags([
+                    "-UHAVE_CONFIG_H",
+                    "-D_GNU_SOURCE",
+                    "-Wno-shorten-64-to-32",
+                    "-Wno-deprecated-non-prototype",
+                    "-Wno-pointer-bool-conversion",
+                    "-Wno-unused-function",
+                    "-Wno-unused-variable"
+                ])
+            ]
+        )
+    ],
+    cLanguageStandard: .c99
+)
diff --git a/include/module.modulemap b/include/module.modulemap
new file mode 100644
index 000000000..9e25ed860
--- /dev/null
+++ b/include/module.modulemap
@@ -0,0 +1,11 @@
+module clibdogecoin {
+    // libdogecoin.h is the unified API header that contains all public functions
+    // It already includes definitions from bip32, bip39, bip44, wallet, etc.
+    header "dogecoin/libdogecoin.h"
+
+    // BIP39 English wordlist for mnemonic validation and autocomplete
+    // This only contains a const char array, no typedef conflicts
+    header "bip39/english.h"
+
+    export *
+}