chore: initialize qiming workspace repository

qimingclaw/crates/qiming-mcp-stdio-proxy/src/errors.ts

@@ -0,0 +1,47 @@
+/**
+ * Unified error types for qiming-mcp-stdio-proxy
+ *
+ * Provides structured error handling across all modules.
+ */
+
+/** Connection error - used for transport layer connection failures */
+export class ConnectionError extends Error {
+  constructor(
+    public readonly serverId: string,
+    public readonly cause: Error,
+  ) {
+    super(`Connection failed for "${serverId}": ${cause.message}`);
+    this.name = 'ConnectionError';
+  }
+}
+
+/** Tool call error - used for tool execution failures */
+export class ToolCallError extends Error {
+  constructor(
+    public readonly toolName: string,
+    public readonly serverId: string | undefined,
+    public readonly cause: Error,
+  ) {
+    super(`Tool "${toolName}" call failed: ${cause.message}`);
+    this.name = 'ToolCallError';
+  }
+}
+
+/** Health check error - used for heartbeat detection failures */
+export class HealthCheckError extends Error {
+  constructor(
+    public readonly serverId: string,
+    public readonly consecutiveFailures: number,
+  ) {
+    super(`Health check failed for "${serverId}" (${consecutiveFailures} consecutive failures)`);
+    this.name = 'HealthCheckError';
+  }
+}
+
+/** Configuration error - used for config validation failures */
+export class ConfigError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'ConfigError';
+  }
+}