fix(lsp): support server workspace configuration

src/client.ts

@@ -102,9 +102,19 @@ export class LspClient {
         }
       },
     );
-    // Accept Common Server Requests - Return empty/null so servers don't
-    // stall. Good enough for a CLI; a real client would answer properly.
-    this.conn.onRequest("workspace/configuration", () => []);
+    // Accept Common Server Requests - Return one configuration response per
+    // requested item. Server-specific settings live in server.ts so adding
+    // another picky server doesn't grow conditionals in this transport layer.
+    this.conn.onRequest(
+      "workspace/configuration",
+      (params: { items?: { section?: string }[] }) => {
+        const items = params.items ?? [];
+        const config = this.server.workspaceConfiguration;
+        return items.map((item) =>
+          config?.getSection?.(item.section, { rootDir, env }) ?? null,
+        );
+      },
+    );
     this.conn.onRequest("client/registerCapability", () => null);
     this.conn.onRequest("client/unregisterCapability", () => null);
 
@@ -136,6 +146,16 @@ export class LspClient {
       },
     });
     this.conn.sendNotification("initialized", {});
+
+    // Push Configuration - Some servers do not always request workspace/configuration,
+    // but still consume settings delivered through didChangeConfiguration.
+    const settings = this.server.workspaceConfiguration?.initialSettings?.({
+      rootDir,
+      env,
+    });
+    if (settings !== undefined && settings !== null) {
+      this.conn.sendNotification("workspace/didChangeConfiguration", { settings });
+    }
   }
 
   // Wait For Ready - Resolves when there are no outstanding progress

src/types.ts

@@ -17,6 +17,22 @@ export class ServerNotFoundError extends Error {
   }
 }
 
+export interface WorkspaceConfigurationContext {
+  rootDir: string;
+  env: NodeJS.ProcessEnv;
+}
+
+export interface ServerWorkspaceConfiguration {
+  // Initial Settings - Optional payload pushed via workspace/didChangeConfiguration
+  // after initialize/initialized for servers that don't always request config.
+  initialSettings?: (ctx: WorkspaceConfigurationContext) => unknown;
+  // Section Settings - Optional handler for workspace/configuration requests.
+  getSection?: (
+    section: string | undefined,
+    ctx: WorkspaceConfigurationContext,
+  ) => unknown;
+}
+
 export interface ServerConfig {
   // Stable identifier (useful for logs and future daemon cache keys).
   id: string;
@@ -38,6 +54,9 @@ export interface ServerConfig {
   // hover/definition/references/completion/documentSymbol but included
   // in lsp_diagnostics and auto-check.
   diagnosticsOnly?: boolean;
+  // Workspace Configuration - Optional server-specific settings exposed through
+  // workspace/configuration and workspace/didChangeConfiguration.
+  workspaceConfiguration?: ServerWorkspaceConfiguration;
 }
 
 // Supported high-level commands exposed via the CLI. Extend this union