Fix dev mode logic: prioritize build-from-sources over download

- Reorganize gateway installation logic to check dev mode FIRST
- In development mode with source files: Always build awmg using make build-awmg
- Only fall back to download if NOT in dev mode (or no source files)
- Prevents 404 errors when trying to download unreleased binaries in PRs
- Order: Dev build -> PATH check -> Local binary -> Download from releases

This fixes the CI error where compiled lock files tried to download
non-existent binaries in development mode instead of building from sources.

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

.github/workflows/dev.lock.yml

@@ -121,55 +121,54 @@ func generateMCPGatewayStartStep(config *MCPGatewayConfig, mcpServersConfig map[
 		"            IS_DEV_MODE=\"true\"",
 		"          fi",
 		"          ",
-		"          # Install awmg CLI if not already available",
-		"          if ! command -v awmg &> /dev/null; then",
-		"            # In development mode, build from sources if in gh-aw repo",
-		"            if [ \"$IS_DEV_MODE\" = \"true\" ] && [ -f \"cmd/awmg/main.go\" ] && [ -f \"Makefile\" ]; then",
-		"              echo 'Building awmg from sources (development mode)...'",
-		"              make build-awmg",
-		"              if [ -f \"./awmg\" ]; then",
-		"                echo 'Built awmg successfully'",
-		"                AWMG_CMD=\"./awmg\"",
-		"              else",
-		"                echo 'ERROR: Failed to build awmg from sources'",
-		"                exit 1",
-		"              fi",
-		"            elif [ -f \"./awmg\" ]; then",
-		"              echo 'Using existing local awmg build'",
+		"          # In development mode, always build from sources if possible",
+		"          if [ \"$IS_DEV_MODE\" = \"true\" ] && [ -f \"cmd/awmg/main.go\" ] && [ -f \"Makefile\" ]; then",
+		"            echo 'Building awmg from sources (development mode)...'",
+		"            make build-awmg",
+		"            if [ -f \"./awmg\" ]; then",
+		"              echo 'Built awmg successfully'",
 		"              AWMG_CMD=\"./awmg\"",
 		"            else",
+		"              echo 'ERROR: Failed to build awmg from sources'",
+		"              exit 1",
+		"            fi",
+		"          # Check if awmg is already in PATH",
+		"          elif command -v awmg &> /dev/null; then",
+		"            echo 'awmg is already available in PATH'",
+		"            AWMG_CMD=\"awmg\"",
+		"          # Check for local awmg build",
+		"          elif [ -f \"./awmg\" ]; then",
+		"            echo 'Using existing local awmg build'",
+		"            AWMG_CMD=\"./awmg\"",
+		"          else",
 	}
 
 	stepLines = append(stepLines,
-		"              # Download awmg from releases",
-		"              echo 'Downloading awmg from GitHub releases...'",
-		"              ",
-		"              # Detect platform",
-		"              OS=$(uname -s | tr '[:upper:]' '[:lower:]')",
-		"              ARCH=$(uname -m)",
-		"              if [ \"$ARCH\" = \"x86_64\" ]; then ARCH=\"amd64\"; fi",
-		"              if [ \"$ARCH\" = \"aarch64\" ]; then ARCH=\"arm64\"; fi",
-		"              ",
-		"              AWMG_BINARY=\"awmg-${OS}-${ARCH}\"",
-		"              if [ \"$OS\" = \"windows\" ]; then AWMG_BINARY=\"${AWMG_BINARY}.exe\"; fi",
-		"              ",
-		"              # Download from releases using curl (no gh CLI dependency)",
-		"              RELEASE_URL=\"https://github.com/githubnext/gh-aw/releases/latest/download/$AWMG_BINARY\"",
-		"              echo \"Downloading from $RELEASE_URL\"",
-		"              if curl -L -f -o \"/tmp/$AWMG_BINARY\" \"$RELEASE_URL\"; then",
-		"                chmod +x \"/tmp/$AWMG_BINARY\"",
-		"                AWMG_CMD=\"/tmp/$AWMG_BINARY\"",
-		"                echo 'Downloaded awmg successfully'",
-		"              else",
-		"                echo 'ERROR: Could not find or download awmg binary'",
-		"                echo 'Please ensure awmg is available or download it from:'",
-		"                echo 'https://github.com/githubnext/gh-aw/releases'",
-		"                exit 1",
-		"              fi",
+		"            # Download awmg from releases",
+		"            echo 'Downloading awmg from GitHub releases...'",
+		"            ",
+		"            # Detect platform",
+		"            OS=$(uname -s | tr '[:upper:]' '[:lower:]')",
+		"            ARCH=$(uname -m)",
+		"            if [ \"$ARCH\" = \"x86_64\" ]; then ARCH=\"amd64\"; fi",
+		"            if [ \"$ARCH\" = \"aarch64\" ]; then ARCH=\"arm64\"; fi",
+		"            ",
+		"            AWMG_BINARY=\"awmg-${OS}-${ARCH}\"",
+		"            if [ \"$OS\" = \"windows\" ]; then AWMG_BINARY=\"${AWMG_BINARY}.exe\"; fi",
+		"            ",
+		"            # Download from releases using curl (no gh CLI dependency)",
+		"            RELEASE_URL=\"https://github.com/githubnext/gh-aw/releases/latest/download/$AWMG_BINARY\"",
+		"            echo \"Downloading from $RELEASE_URL\"",
+		"            if curl -L -f -o \"/tmp/$AWMG_BINARY\" \"$RELEASE_URL\"; then",
+		"              chmod +x \"/tmp/$AWMG_BINARY\"",
+		"              AWMG_CMD=\"/tmp/$AWMG_BINARY\"",
+		"              echo 'Downloaded awmg successfully'",
+		"            else",
+		"              echo 'ERROR: Could not find or download awmg binary'",
+		"              echo 'Please ensure awmg is available or download it from:'",
+		"              echo 'https://github.com/githubnext/gh-aw/releases'",
+		"              exit 1",
 		"            fi",
-		"          else",
-		"            echo 'awmg is already available'",
-		"            AWMG_CMD=\"awmg\"",
 		"          fi",
 		"          ",
 		"          # Start MCP gateway in background with config piped via stdin",