diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 054c9f2..9dda7f2 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -39,29 +39,28 @@ You can also use the command `session-info` for more info on mounts for this pro
 
 3. **Build properties**: `Directory.Build.props`
 
-   - Line 4: `<CopilotHereVersion>YYYY.MM.DD</CopilotHereVersion>`
+   - Reads `CopilotHereVersion` from the `VERSION` file automatically (no manual edit needed)
 
 4. **Build info**: `app/Infrastructure/BuildInfo.cs`
 
    - Line 13: `public const string BuildDate = "YYYY.MM.DD";`
 
-5. **This file**: `.github/copilot-instructions.md`
-   - Update "Current version" below
-
 ### Verification Checklist
 
 Before committing, verify all 5 locations have the EXACT SAME version:
 
 ```bash
 # Quick check - all should show the same version
+cat VERSION
 grep "Version: " copilot_here.sh
 grep "Version: " copilot_here.ps1
 grep "COPILOT_HERE_VERSION=" copilot_here.sh
 grep "CopilotHereVersion =" copilot_here.ps1
-grep "CopilotHereVersion>" Directory.Build.props
 grep "BuildDate = " app/Infrastructure/BuildInfo.cs
 ```
 
+Use `scripts/bump-version.sh YYYY.MM.DD` to update all locations at once.
+
 ### When to Update Version
 
 - Any modification to shell function code
diff --git a/docker/generated/Dockerfile.default b/docker/generated/Dockerfile.default
index ab28b1c..4675104 100644
--- a/docker/generated/Dockerfile.default
+++ b/docker/generated/Dockerfile.default
@@ -44,6 +44,17 @@ RUN ARCH=$(dpkg --print-architecture) \
     && rm /tmp/powershell.tar.gz; \
   fi
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.dotnet b/docker/generated/Dockerfile.dotnet
index 0467b91..f3b803e 100644
--- a/docker/generated/Dockerfile.dotnet
+++ b/docker/generated/Dockerfile.dotnet
@@ -95,6 +95,28 @@ RUN wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
      fi \
   && rm dotnet-install.sh
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
+# --- snippet: lsp-csharp ---
+# Install C# Language Server for code intelligence
+# Install directly to a shared location so appuser can access it
+ARG CSHARP_LS_VERSION=latest
+RUN dotnet tool install csharp-ls --tool-path /usr/local/bin --version ${CSHARP_LS_VERSION}
+
+# Write LSP config fragment for C#
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "csharp": { "command": "csharp-ls", "args": [], "fileExtensions": { ".cs": "csharp", ".csx": "csharp" } } } }' \
+    > /etc/copilot/lsp-config.d/csharp.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.dotnet-10 b/docker/generated/Dockerfile.dotnet-10
index 1f74541..470dc39 100644
--- a/docker/generated/Dockerfile.dotnet-10
+++ b/docker/generated/Dockerfile.dotnet-10
@@ -69,6 +69,28 @@ RUN wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
      fi \
   && rm dotnet-install.sh
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
+# --- snippet: lsp-csharp ---
+# Install C# Language Server for code intelligence
+# Install directly to a shared location so appuser can access it
+ARG CSHARP_LS_VERSION=latest
+RUN dotnet tool install csharp-ls --tool-path /usr/local/bin --version ${CSHARP_LS_VERSION}
+
+# Write LSP config fragment for C#
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "csharp": { "command": "csharp-ls", "args": [], "fileExtensions": { ".cs": "csharp", ".csx": "csharp" } } } }' \
+    > /etc/copilot/lsp-config.d/csharp.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.dotnet-8 b/docker/generated/Dockerfile.dotnet-8
index 7703493..124d62a 100644
--- a/docker/generated/Dockerfile.dotnet-8
+++ b/docker/generated/Dockerfile.dotnet-8
@@ -69,6 +69,17 @@ RUN wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
      fi \
   && rm dotnet-install.sh
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.dotnet-9 b/docker/generated/Dockerfile.dotnet-9
index df9f62a..7f0d563 100644
--- a/docker/generated/Dockerfile.dotnet-9
+++ b/docker/generated/Dockerfile.dotnet-9
@@ -69,6 +69,17 @@ RUN wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
      fi \
   && rm dotnet-install.sh
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.dotnet-playwright b/docker/generated/Dockerfile.dotnet-playwright
index 6cb3c46..087c97a 100644
--- a/docker/generated/Dockerfile.dotnet-playwright
+++ b/docker/generated/Dockerfile.dotnet-playwright
@@ -136,6 +136,28 @@ RUN npx playwright install --with-deps
 # Make playwright browsers directory world-writable so any UID can access/update them
 RUN chmod -R 777 /ms-playwright
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
+# --- snippet: lsp-csharp ---
+# Install C# Language Server for code intelligence
+# Install directly to a shared location so appuser can access it
+ARG CSHARP_LS_VERSION=latest
+RUN dotnet tool install csharp-ls --tool-path /usr/local/bin --version ${CSHARP_LS_VERSION}
+
+# Write LSP config fragment for C#
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "csharp": { "command": "csharp-ls", "args": [], "fileExtensions": { ".cs": "csharp", ".csx": "csharp" } } } }' \
+    > /etc/copilot/lsp-config.d/csharp.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.dotnet-rust b/docker/generated/Dockerfile.dotnet-rust
index 794e525..c831d3c 100644
--- a/docker/generated/Dockerfile.dotnet-rust
+++ b/docker/generated/Dockerfile.dotnet-rust
@@ -116,6 +116,37 @@ RUN chmod -R a+rwX /usr/local/cargo
 # Verify installation
 RUN rustc --version && cargo --version
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
+# --- snippet: lsp-csharp ---
+# Install C# Language Server for code intelligence
+# Install directly to a shared location so appuser can access it
+ARG CSHARP_LS_VERSION=latest
+RUN dotnet tool install csharp-ls --tool-path /usr/local/bin --version ${CSHARP_LS_VERSION}
+
+# Write LSP config fragment for C#
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "csharp": { "command": "csharp-ls", "args": [], "fileExtensions": { ".cs": "csharp", ".csx": "csharp" } } } }' \
+    > /etc/copilot/lsp-config.d/csharp.json
+
+# --- snippet: lsp-rust ---
+# Install Rust Analyzer for code intelligence
+RUN rustup component add rust-analyzer
+
+# Write LSP config fragment for Rust
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "rust": { "command": "rust-analyzer", "args": [], "fileExtensions": { ".rs": "rust" } } } }' \
+    > /etc/copilot/lsp-config.d/rust.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.golang b/docker/generated/Dockerfile.golang
index 7283aa8..3c922b2 100644
--- a/docker/generated/Dockerfile.golang
+++ b/docker/generated/Dockerfile.golang
@@ -63,6 +63,27 @@ RUN mkdir -p ${GOPATH} \
 # Verify installation
 RUN go version
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
+# --- snippet: lsp-golang ---
+# Install gopls (Go Language Server) for code intelligence
+ARG GOPLS_VERSION=latest
+RUN go install golang.org/x/tools/gopls@${GOPLS_VERSION}
+
+# Write LSP config fragment for Go
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "go": { "command": "gopls", "args": ["serve"], "fileExtensions": { ".go": "go" } } } }' \
+    > /etc/copilot/lsp-config.d/golang.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.playwright b/docker/generated/Dockerfile.playwright
index 0ac03fe..d6c7cae 100644
--- a/docker/generated/Dockerfile.playwright
+++ b/docker/generated/Dockerfile.playwright
@@ -85,6 +85,17 @@ RUN npx playwright install --with-deps
 # Make playwright browsers directory world-writable so any UID can access/update them
 RUN chmod -R 777 /ms-playwright
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/generated/Dockerfile.rust b/docker/generated/Dockerfile.rust
index fb90372..6132253 100644
--- a/docker/generated/Dockerfile.rust
+++ b/docker/generated/Dockerfile.rust
@@ -65,6 +65,26 @@ RUN chmod -R a+rwX /usr/local/cargo
 # Verify installation
 RUN rustc --version && cargo --version
 
+# --- snippet: lsp-typescript ---
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json
+
+# --- snippet: lsp-rust ---
+# Install Rust Analyzer for code intelligence
+RUN rustup component add rust-analyzer
+
+# Write LSP config fragment for Rust
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "rust": { "command": "rust-analyzer", "args": [], "fileExtensions": { ".rs": "rust" } } } }' \
+    > /etc/copilot/lsp-config.d/rust.json
+
 # --- snippet: copilot-cli ---
 # ARG for the Copilot CLI version - passed from build process
 # This ensures cache invalidation when a new version is available
diff --git a/docker/images.json b/docker/images.json
index 37b4d51..01fc921 100644
--- a/docker/images.json
+++ b/docker/images.json
@@ -2,43 +2,43 @@
   "images": {
     "default": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "lsp-typescript", "copilot-cli", "entrypoint"]
     },
     "dotnet": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "dotnet9", "dotnet10", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "dotnet9", "dotnet10", "lsp-typescript", "lsp-csharp", "copilot-cli", "entrypoint"]
     },
     "dotnet-8": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "lsp-typescript", "copilot-cli", "entrypoint"]
     },
     "dotnet-9": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet9", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet9", "lsp-typescript", "copilot-cli", "entrypoint"]
     },
     "dotnet-10": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet10", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet10", "lsp-typescript", "lsp-csharp", "copilot-cli", "entrypoint"]
     },
     "playwright": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "playwright", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "playwright", "lsp-typescript", "copilot-cli", "entrypoint"]
     },
     "rust": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "rust", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "rust", "lsp-typescript", "lsp-rust", "copilot-cli", "entrypoint"]
     },
     "golang": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "golang", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "golang", "lsp-typescript", "lsp-golang", "copilot-cli", "entrypoint"]
     },
     "dotnet-playwright": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "dotnet9", "dotnet10", "playwright", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "dotnet9", "dotnet10", "playwright", "lsp-typescript", "lsp-csharp", "copilot-cli", "entrypoint"]
     },
     "dotnet-rust": {
       "base": "node:20-slim",
-      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "dotnet9", "dotnet10", "rust", "copilot-cli", "entrypoint"]
+      "snippets": ["system-packages", "powershell", "dotnet-prereqs", "dotnet8", "dotnet9", "dotnet10", "rust", "lsp-typescript", "lsp-csharp", "lsp-rust", "copilot-cli", "entrypoint"]
     }
   }
 }
diff --git a/docker/shared/entrypoint.sh b/docker/shared/entrypoint.sh
index 8386d64..24dc400 100644
--- a/docker/shared/entrypoint.sh
+++ b/docker/shared/entrypoint.sh
@@ -69,5 +69,26 @@ chown -R "$USER_ID:$GROUP_ID" /home/appuser/.npm
 
 export HOME=/home/appuser
 
+# Merge LSP config fragments into ~/.copilot/lsp-config.json (if not already provided by user)
+if [ -d /etc/copilot/lsp-config.d ] && [ ! -f /home/appuser/.copilot/lsp-config.json ]; then
+  node -e "
+    const fs = require('fs'), path = require('path');
+    const dir = '/etc/copilot/lsp-config.d';
+    const servers = {};
+    fs.readdirSync(dir).filter(f => f.endsWith('.json')).sort().forEach(f => {
+      const fullPath = path.join(dir, f);
+      try {
+        const contents = fs.readFileSync(fullPath, 'utf8');
+        const cfg = JSON.parse(contents);
+        Object.assign(servers, cfg.lspServers || {});
+      } catch (err) {
+        console.error('Warning: failed to load LSP config fragment ' + fullPath + ': ' + err.message);
+      }
+    });
+    fs.writeFileSync('/home/appuser/.copilot/lsp-config.json', JSON.stringify({ lspServers: servers }, null, 2));
+  "
+  chown "$USER_ID:$GROUP_ID" /home/appuser/.copilot/lsp-config.json
+fi
+
 # Switch to the user matching the host UID and execute the command passed to the script.
 exec gosu appuser "$@"
diff --git a/docker/snippets/lsp-csharp.Dockerfile b/docker/snippets/lsp-csharp.Dockerfile
new file mode 100644
index 0000000..98c8d84
--- /dev/null
+++ b/docker/snippets/lsp-csharp.Dockerfile
@@ -0,0 +1,9 @@
+# Install C# Language Server for code intelligence
+# Install directly to a shared location so appuser can access it
+ARG CSHARP_LS_VERSION=latest
+RUN dotnet tool install csharp-ls --tool-path /usr/local/bin --version ${CSHARP_LS_VERSION}
+
+# Write LSP config fragment for C#
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "csharp": { "command": "csharp-ls", "args": [], "fileExtensions": { ".cs": "csharp", ".csx": "csharp" } } } }' \
+    > /etc/copilot/lsp-config.d/csharp.json
diff --git a/docker/snippets/lsp-golang.Dockerfile b/docker/snippets/lsp-golang.Dockerfile
new file mode 100644
index 0000000..73b1f6d
--- /dev/null
+++ b/docker/snippets/lsp-golang.Dockerfile
@@ -0,0 +1,8 @@
+# Install gopls (Go Language Server) for code intelligence
+ARG GOPLS_VERSION=latest
+RUN go install golang.org/x/tools/gopls@${GOPLS_VERSION}
+
+# Write LSP config fragment for Go
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "go": { "command": "gopls", "args": ["serve"], "fileExtensions": { ".go": "go" } } } }' \
+    > /etc/copilot/lsp-config.d/golang.json
diff --git a/docker/snippets/lsp-rust.Dockerfile b/docker/snippets/lsp-rust.Dockerfile
new file mode 100644
index 0000000..718c165
--- /dev/null
+++ b/docker/snippets/lsp-rust.Dockerfile
@@ -0,0 +1,7 @@
+# Install Rust Analyzer for code intelligence
+RUN rustup component add rust-analyzer
+
+# Write LSP config fragment for Rust
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "rust": { "command": "rust-analyzer", "args": [], "fileExtensions": { ".rs": "rust" } } } }' \
+    > /etc/copilot/lsp-config.d/rust.json
diff --git a/docker/snippets/lsp-typescript.Dockerfile b/docker/snippets/lsp-typescript.Dockerfile
new file mode 100644
index 0000000..814badc
--- /dev/null
+++ b/docker/snippets/lsp-typescript.Dockerfile
@@ -0,0 +1,9 @@
+# Install TypeScript Language Server for code intelligence
+ARG TYPESCRIPT_VERSION=latest
+ARG TYPESCRIPT_LANGUAGE_SERVER_VERSION=latest
+RUN npm install -g typescript@${TYPESCRIPT_VERSION} typescript-language-server@${TYPESCRIPT_LANGUAGE_SERVER_VERSION}
+
+# Write LSP config fragment for TypeScript
+RUN mkdir -p /etc/copilot/lsp-config.d && \
+    echo '{ "lspServers": { "typescript": { "command": "typescript-language-server", "args": ["--stdio"], "fileExtensions": { ".ts": "typescript", ".tsx": "typescriptreact", ".js": "javascript", ".jsx": "javascriptreact" } } } }' \
+    > /etc/copilot/lsp-config.d/typescript.json