refactor(runtimes): split provider files to slim shim binary

.github/workflows/build.yml

@@ -182,7 +182,7 @@ jobs:
 
     - name: Build shim executable
       run: |
-        go build -v -ldflags="-s -w" -trimpath -o dist/dtvem-shim${{ matrix.goos == 'windows' && '.exe' || '' }} ./src/cmd/shim
+        go build -v -ldflags="-s -w" -trimpath -tags shim -o dist/dtvem-shim${{ matrix.goos == 'windows' && '.exe' || '' }} ./src/cmd/shim
       shell: bash
       env:
         GOOS: ${{ matrix.goos }}

.github/workflows/release.yml

@@ -187,7 +187,7 @@ jobs:
 
     - name: Build shim executable
       run: |
-        go build -v -ldflags="-s -w" -trimpath -o dist/dtvem-shim${{ matrix.goos == 'windows' && '.exe' || '' }} ./src/cmd/shim
+        go build -v -ldflags="-s -w" -trimpath -tags shim -o dist/dtvem-shim${{ matrix.goos == 'windows' && '.exe' || '' }} ./src/cmd/shim
       shell: bash
       env:
         GOOS: ${{ matrix.goos }}

rnr.yaml

@@ -28,7 +28,7 @@ build-cli:
 
 build-shim:
   description: Build the shim executable
-  cmd: go build -v -ldflags="-s -w" -trimpath -o dist/dtvem-shim.exe ./src/cmd/shim
+  cmd: go build -v -ldflags="-s -w" -trimpath -tags shim -o dist/dtvem-shim.exe ./src/cmd/shim
 
 # Deployment (Windows)
 deploy-local:

src/internal/runtime/provider.go

@@ -34,61 +34,3 @@ type ShimProvider interface {
 	// Returns an empty map if no special environment is needed.
 	GetEnvironment(version string) (map[string]string, error)
 }
-
-// Provider defines the full interface that all runtime providers must implement.
-// It embeds ShimProvider and adds operations that require heavier dependencies.
-type Provider interface {
-	ShimProvider
-
-	// Install downloads and installs a specific version of the runtime
-	Install(version string) error
-
-	// Uninstall removes an installed version of the runtime
-	Uninstall(version string) error
-
-	// ListInstalled returns all installed versions of this runtime
-	ListInstalled() ([]InstalledVersion, error)
-
-	// ListAvailable returns all available versions that can be installed
-	// This might query online sources or use cached data
-	ListAvailable() ([]AvailableVersion, error)
-
-	// InstallPath returns the installation directory for a given version
-	InstallPath(version string) (string, error)
-
-	// GlobalVersion returns the globally configured version, if any
-	GlobalVersion() (string, error)
-
-	// SetGlobalVersion sets the global default version
-	SetGlobalVersion(version string) error
-
-	// LocalVersion returns the locally configured version for the current directory
-	// This reads from dtvem.config.json
-	LocalVersion() (string, error)
-
-	// SetLocalVersion sets the local version for the current directory
-	SetLocalVersion(version string) error
-
-	// CurrentVersion returns the currently active version
-	// (checks local first, then global)
-	CurrentVersion() (string, error)
-
-	// DetectInstalled scans the system for existing installations of this runtime
-	// Returns a list of detected versions with their paths and sources
-	DetectInstalled() ([]DetectedVersion, error)
-
-	// GlobalPackages detects globally installed packages for a specific installation
-	// Takes the installation path and returns a list of package names
-	// Returns empty slice if the runtime doesn't support global packages
-	GlobalPackages(installPath string) ([]string, error)
-
-	// InstallGlobalPackages reinstalls global packages to a specific version
-	// Takes the version and list of package names to install
-	// Returns nil if the runtime doesn't support global packages
-	InstallGlobalPackages(version string, packages []string) error
-
-	// ManualPackageInstallCommand returns the command string for manually installing packages
-	// Used to provide help text to users if automatic package installation fails
-	// Returns empty string if the runtime doesn't support global packages
-	ManualPackageInstallCommand(packages []string) string
-}

src/internal/runtime/provider_full.go

@@ -0,0 +1,64 @@
+//go:build !shim
+
+package runtime
+
+// Provider defines the full interface that all runtime providers must implement.
+// It embeds ShimProvider and adds operations that require heavier dependencies
+// (HTTP, archive extraction, manifest fetching). These methods are not compiled
+// into the shim binary; in shim builds, Provider is an alias for ShimProvider
+// (see provider_shim.go).
+type Provider interface {
+	ShimProvider
+
+	// Install downloads and installs a specific version of the runtime
+	Install(version string) error
+
+	// Uninstall removes an installed version of the runtime
+	Uninstall(version string) error
+
+	// ListInstalled returns all installed versions of this runtime
+	ListInstalled() ([]InstalledVersion, error)
+
+	// ListAvailable returns all available versions that can be installed
+	// This might query online sources or use cached data
+	ListAvailable() ([]AvailableVersion, error)
+
+	// InstallPath returns the installation directory for a given version
+	InstallPath(version string) (string, error)
+
+	// GlobalVersion returns the globally configured version, if any
+	GlobalVersion() (string, error)
+
+	// SetGlobalVersion sets the global default version
+	SetGlobalVersion(version string) error
+
+	// LocalVersion returns the locally configured version for the current directory
+	// This reads from dtvem.config.json
+	LocalVersion() (string, error)
+
+	// SetLocalVersion sets the local version for the current directory
+	SetLocalVersion(version string) error
+
+	// CurrentVersion returns the currently active version
+	// (checks local first, then global)
+	CurrentVersion() (string, error)
+
+	// DetectInstalled scans the system for existing installations of this runtime
+	// Returns a list of detected versions with their paths and sources
+	DetectInstalled() ([]DetectedVersion, error)
+
+	// GlobalPackages detects globally installed packages for a specific installation
+	// Takes the installation path and returns a list of package names
+	// Returns empty slice if the runtime doesn't support global packages
+	GlobalPackages(installPath string) ([]string, error)
+
+	// InstallGlobalPackages reinstalls global packages to a specific version
+	// Takes the version and list of package names to install
+	// Returns nil if the runtime doesn't support global packages
+	InstallGlobalPackages(version string, packages []string) error
+
+	// ManualPackageInstallCommand returns the command string for manually installing packages
+	// Used to provide help text to users if automatic package installation fails
+	// Returns empty string if the runtime doesn't support global packages
+	ManualPackageInstallCommand(packages []string) string
+}

src/internal/runtime/provider_shim.go

@@ -0,0 +1,13 @@
+//go:build shim
+
+package runtime
+
+// Provider is the public type used throughout the codebase for registered
+// runtime implementations. In default builds Provider is the full interface
+// declared in provider_full.go; in shim builds it collapses to ShimProvider
+// so the heavy methods (Install, ListAvailable, etc.) are never referenced
+// in the shim binary's import graph.
+//
+// The registry stores values of type Provider, so this alias keeps the
+// registry and its callers (e.g. internal/shim, cmd/shim) unchanged.
+type Provider = ShimProvider

src/internal/runtime/provider_test_harness.go

@@ -1,3 +1,5 @@
+//go:build !shim
+
 package runtime
 
 import (

src/runtimes/node/lifecycle.go

@@ -1,3 +1,8 @@
+//go:build !shim
+
+// Lifecycle computation is only used by the dtvem CLI (e.g., `list-all`) and
+// embeds ~50KB of schedule.json. Tagged !shim so neither the code nor the
+// embedded data is linked into the shim binary.
 package node
 
 import (