v0.5.0: Binary-Free Mode - No OpenCode binary required

✨ Major Features:
- Native session management without OpenCode binary
- Provider routing: OpenCode Zen (free), Qwen OAuth, Z.AI
- Streaming chat with tool execution loop
- Mode detection API (/api/meta/mode)
- MCP integration fix (resolved infinite loading)
- NomadArch Native option in UI with comparison info

🆓 Free Models (No API Key):
- GPT-5 Nano (400K context)
- Grok Code Fast 1 (256K context)
- GLM-4.7 (205K context)
- Doubao Seed Code (256K context)
- Big Pickle (200K context)

📦 New Files:
- session-store.ts: Native session persistence
- native-sessions.ts: REST API for sessions
- lite-mode.ts: UI mode detection client
- native-sessions.ts (UI): SolidJS store

🔧 Updated:
- All installers: Optional binary download
- All launchers: Mode detection display
- Binary selector: Added NomadArch Native option
- README: Binary-Free Mode documentation

Install-Windows.bat

@@ -5,7 +5,7 @@ title NomadArch Installer
 
 echo.
 echo NomadArch Installer (Windows)
-echo Version: 0.4.0
+echo Version: 0.5.0 - Binary-Free Mode
 echo.
 
 set SCRIPT_DIR=%~dp0
@@ -21,7 +21,7 @@ set NEEDS_FALLBACK=0
 
 echo [%date% %time%] Installer started >> "%LOG_FILE%"
 
-echo [STEP 1/9] OS and Architecture Detection
+echo [STEP 1/8] OS and Architecture Detection
 wmic os get osarchitecture | findstr /i "64-bit" >nul
 if %ERRORLEVEL% equ 0 (
     set ARCH=x64
@@ -31,7 +31,7 @@ if %ERRORLEVEL% equ 0 (
 echo [OK] Architecture: %ARCH%
 
 echo.
-echo [STEP 2/9] Checking write permissions
+echo [STEP 2/8] Checking write permissions
 if not exist "%BIN_DIR%" mkdir "%BIN_DIR%"
 if not exist "%TEMP_DIR%" mkdir "%TEMP_DIR%"
 
@@ -61,7 +61,7 @@ if %ERRORLEVEL% neq 0 (
 )
 
 echo.
-echo [STEP 3/9] Ensuring system dependencies
+echo [STEP 3/8] Ensuring system dependencies
 
 set WINGET_AVAILABLE=0
 where winget >nul 2>&1 && set WINGET_AVAILABLE=1
@@ -129,7 +129,7 @@ if %ERRORLEVEL% neq 0 (
 )
 
 echo.
-echo [STEP 4/9] Installing npm dependencies
+echo [STEP 4/8] Installing npm dependencies
 cd /d "%SCRIPT_DIR%"
 echo [%date% %time%] Running npm install >> "%LOG_FILE%"
 call npm install
@@ -142,54 +142,66 @@ if %ERRORLEVEL% neq 0 (
 echo [OK] Dependencies installed
 
 echo.
-echo [STEP 5/9] Fetching OpenCode binary
+echo [STEP 5/8] OpenCode Binary (OPTIONAL - Binary-Free Mode Available)
+echo [INFO] NomadArch now supports Binary-Free Mode!
+echo [INFO] You can use the application without OpenCode binary.
+echo [INFO] Free models from OpenCode Zen are available without the binary.
 if not exist "%BIN_DIR%" mkdir "%BIN_DIR%"
 
-for /f "delims=" %%v in ('powershell -NoProfile -Command "(Invoke-WebRequest -UseBasicParsing https://api.github.com/repos/sst/opencode/releases/latest).Content ^| Select-String -Pattern '""tag_name""' ^| ForEach-Object { $_.Line.Split(''\"'')[3] }"') do (
-    set OPENCODE_VERSION=%%v
-)
-
-set OPENCODE_BASE=https://github.com/sst/opencode/releases/download/v!OPENCODE_VERSION!
-set OPENCODE_URL=!OPENCODE_BASE!/opencode-windows-%ARCH%.exe
-set CHECKSUM_URL=!OPENCODE_BASE!/checksums.txt
-
-if exist "%BIN_DIR%\opencode.exe" (
-    echo [OK] OpenCode binary already exists
-    echo [%date% %time%] OpenCode binary exists, skipping download >> "%LOG_FILE%"
+set SKIP_OPENCODE=0
+set /p SKIP_CHOICE="Skip OpenCode binary download? (Y for Binary-Free Mode / N to download) [Y]: "
+if /i "%SKIP_CHOICE%"=="" set SKIP_CHOICE=Y
+if /i "%SKIP_CHOICE%"=="Y" (
+    set SKIP_OPENCODE=1
+    echo [INFO] Skipping OpenCode binary - using Binary-Free Mode
+    echo [%date% %time%] Using Binary-Free Mode >> "%LOG_FILE%"
 ) else (
-    echo [INFO] Downloading OpenCode v!OPENCODE_VERSION!...
-    if "%DOWNLOAD_CMD%"=="curl" (
-        curl -L -o "%BIN_DIR%\opencode.exe.tmp" "!OPENCODE_URL!"
-        curl -L -o "%BIN_DIR%\checksums.txt" "!CHECKSUM_URL!"
+    for /f "delims=" %%v in ('powershell -NoProfile -Command "(Invoke-WebRequest -UseBasicParsing https://api.github.com/repos/sst/opencode/releases/latest).Content ^| Select-String -Pattern '\"\"tag_name\"\"' ^| ForEach-Object { $_.Line.Split(''\"'')[3] }"') do (
+        set OPENCODE_VERSION=%%v
+    )
+
+    set OPENCODE_BASE=https://github.com/sst/opencode/releases/download/v!OPENCODE_VERSION!
+    set OPENCODE_URL=!OPENCODE_BASE!/opencode-windows-%ARCH%.exe
+    set CHECKSUM_URL=!OPENCODE_BASE!/checksums.txt
+
+    if exist "%BIN_DIR%\opencode.exe" (
+        echo [OK] OpenCode binary already exists
+        echo [%date% %time%] OpenCode binary exists, skipping download >> "%LOG_FILE%"
     ) else (
-        powershell -NoProfile -Command "Invoke-WebRequest -Uri '%OPENCODE_URL%' -OutFile '%BIN_DIR%\\opencode.exe.tmp'"
-        powershell -NoProfile -Command "Invoke-WebRequest -Uri '%CHECKSUM_URL%' -OutFile '%BIN_DIR%\\checksums.txt'"
-    )
+        echo [INFO] Downloading OpenCode v!OPENCODE_VERSION!...
+        if "%DOWNLOAD_CMD%"=="curl" (
+            curl -L -o "%BIN_DIR%\opencode.exe.tmp" "!OPENCODE_URL!"
+            curl -L -o "%BIN_DIR%\checksums.txt" "!CHECKSUM_URL!"
+        ) else (
+            powershell -NoProfile -Command "Invoke-WebRequest -Uri '%OPENCODE_URL%' -OutFile '%BIN_DIR%\\opencode.exe.tmp'"
+            powershell -NoProfile -Command "Invoke-WebRequest -Uri '%CHECKSUM_URL%' -OutFile '%BIN_DIR%\\checksums.txt'"
+        )
 
-    set EXPECTED_HASH=
-    for /f "tokens=1,2" %%h in ('type "%BIN_DIR%\checksums.txt" ^| findstr /i "opencode-windows-%ARCH%"') do (
-        set EXPECTED_HASH=%%h
-    )
+        set EXPECTED_HASH=
+        for /f "tokens=1,2" %%h in ('type "%BIN_DIR%\checksums.txt" ^| findstr /i "opencode-windows-%ARCH%"') do (
+            set EXPECTED_HASH=%%h
+        )
 
-    set ACTUAL_HASH=
-    for /f "skip=1 tokens=*" %%h in ('certutil -hashfile "%BIN_DIR%\opencode.exe.tmp" SHA256 ^| findstr /v "CertUtil" ^| findstr /v "hash of"') do (
-        set ACTUAL_HASH=%%h
-        goto :hash_found
-    )
-    :hash_found
+        set ACTUAL_HASH=
+        for /f "skip=1 tokens=*" %%h in ('certutil -hashfile "%BIN_DIR%\opencode.exe.tmp" SHA256 ^| findstr /v "CertUtil" ^| findstr /v "hash of"') do (
+            set ACTUAL_HASH=%%h
+            goto :hash_found
+        )
+        :hash_found
 
-    if "!ACTUAL_HASH!"=="!EXPECTED_HASH!" (
-        move /Y "%BIN_DIR%\opencode.exe.tmp" "%BIN_DIR%\opencode.exe"
-        echo [OK] OpenCode downloaded and verified
-    ) else (
-        echo [ERROR] OpenCode checksum mismatch!
-        del "%BIN_DIR%\opencode.exe.tmp"
-        set /a ERRORS+=1
+        if "!ACTUAL_HASH!"=="!EXPECTED_HASH!" (
+            move /Y "%BIN_DIR%\opencode.exe.tmp" "%BIN_DIR%\opencode.exe"
+            echo [OK] OpenCode downloaded and verified
+        ) else (
+            echo [WARN] OpenCode checksum mismatch - continuing with Binary-Free Mode
+            del "%BIN_DIR%\opencode.exe.tmp" 2>nul
+            set SKIP_OPENCODE=1
+        )
     )
 )
 
 echo.
-echo [STEP 6/9] Building UI assets
+echo [STEP 6/8] Building UI assets
 if exist "%SCRIPT_DIR%\packages\ui\dist\index.html" (
     echo [OK] UI build already exists
 ) else (
@@ -207,7 +219,7 @@ if exist "%SCRIPT_DIR%\packages\ui\dist\index.html" (
 )
 
 echo.
-echo [STEP 7/9] Post-install health check
+echo [STEP 7/8] Post-install health check
 set HEALTH_ERRORS=0
 
 if not exist "%SCRIPT_DIR%\package.json" set /a HEALTH_ERRORS+=1
@@ -223,19 +235,22 @@ if %HEALTH_ERRORS% equ 0 (
 )
 
 echo.
-echo [STEP 8/9] Installation Summary
+echo [STEP 8/8] Installation Summary
 echo.
 echo   Install Dir: %TARGET_DIR%
 echo   Architecture: %ARCH%
 echo   Node.js: %NODE_VERSION%
 echo   npm: %NPM_VERSION%
+if %SKIP_OPENCODE% equ 1 (
+    echo   Mode: Binary-Free Mode ^(OpenCode Zen free models available^)
+) else (
+    echo   Mode: Full Mode ^(OpenCode binary installed^)
+)
 echo   Errors: %ERRORS%
 echo   Warnings: %WARNINGS%
 echo   Log File: %LOG_FILE%
 echo.
 
-echo [STEP 9/9] Next steps
-
 :SUMMARY
 if %ERRORS% gtr 0 (
     echo [RESULT] Installation completed with errors.
@@ -245,6 +260,12 @@ if %ERRORS% gtr 0 (
 ) else (
     echo [RESULT] Installation completed successfully.
     echo Run Launch-Windows.bat to start the application.
+    echo.
+    if %SKIP_OPENCODE% equ 1 (
+        echo NOTE: Running in Binary-Free Mode.
+        echo       Free models ^(GPT-5 Nano, Grok Code, GLM-4.7, etc.^) are available.
+        echo       You can also authenticate with Qwen for additional models.
+    )
 )
 
 echo.