chore: prepare v1.0.0 release

Add library version defines (SAM3_VERSION_MAJOR/MINOR/PATCH) to sam3.h,
set CMake project version to 1.0.0, add MIT LICENSE file, and rename
internal SAM3_VERSION to SAM3_FILE_VERSION to avoid macro conflict.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: PABannier

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.14)
-project(sam3.cpp LANGUAGES C CXX)
+project(sam3.cpp VERSION 1.0.0 LANGUAGES C CXX)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025-2026 Pierre-Antoine Bannier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

sam3.cpp

@@ -59,7 +59,7 @@
 static constexpr uint32_t SAM3_MAGIC     = 0x73616D33;  // "sam3"
 static constexpr uint32_t SAM2_MAGIC     = 0x73616D32;  // "sam2"
 static constexpr uint32_t SAM3_TOK_MAGIC = 0x746F6B00;  // "tok\0"
-static constexpr int      SAM3_VERSION   = 3;
+static constexpr int      SAM3_FILE_VERSION = 3;
 static constexpr int      SAM2_VERSION   = 1;
 
 
@@ -3216,9 +3216,9 @@ std::shared_ptr<sam3_model> sam3_load_model(const sam3_params& params) {
 
     bool is_sam2 = false;
     if (magic == SAM3_MAGIC) {
-        if (version != SAM3_VERSION) {
+        if (version != SAM3_FILE_VERSION) {
             fprintf(stderr, "%s: unsupported SAM3 version: %d (expected %d)\n",
-                    __func__, version, SAM3_VERSION);
+                    __func__, version, SAM3_FILE_VERSION);
             return nullptr;
         }
     } else if (magic == SAM2_MAGIC) {
@@ -12368,7 +12368,7 @@ bool sam3_test_load_tokenizer(const std::string& model_path) {
     fin.read(reinterpret_cast<char*>(&version), 4);
     fin.read(reinterpret_cast<char*>(&ftype), 4);
     fin.read(reinterpret_cast<char*>(&n_tensors), 4);
-    if (magic != SAM3_MAGIC || version != SAM3_VERSION) return false;
+    if (magic != SAM3_MAGIC || version != SAM3_FILE_VERSION) return false;
 
     // Skip hparams
     sam3_hparams hp;

sam3.h

@@ -5,6 +5,15 @@
 #include <string>
 #include <vector>
 
+/*
+** ── Version ─────────────────────────────────────────────────────────────
+*/
+
+#define SAM3_VERSION_MAJOR 1
+#define SAM3_VERSION_MINOR 0
+#define SAM3_VERSION_PATCH 0
+#define SAM3_VERSION       "1.0.0"
+
 /*
 ** ── Forward Declarations ─────────────────────────────────────────────────
 */