(Init): Added shit

crates/shared/src/config/errors.ts

@@ -0,0 +1,43 @@
+/**
+ * Error types raised by the config and env loaders.
+ *
+ * These are deliberately distinct from `Error` subclasses inside `@elly/core`
+ * or `@elly/bot` — they cross the workspace boundary and must be importable
+ * by both runtimes without dragging unrelated dependencies along.
+ */
+
+export class ConfigError extends Error {
+  readonly path: string;
+
+  constructor(message: string, path: string) {
+    super(message);
+    this.name = "ConfigError";
+    this.path = path;
+  }
+}
+
+export class ConfigValidationError extends ConfigError {
+  readonly issues: readonly ConfigValidationIssue[];
+
+  constructor(message: string, path: string, issues: readonly ConfigValidationIssue[]) {
+    super(message, path);
+    this.name = "ConfigValidationError";
+    this.issues = issues;
+  }
+}
+
+export interface ConfigValidationIssue {
+  readonly path: string;
+  readonly message: string;
+  readonly code: string;
+}
+
+export class EnvValidationError extends Error {
+  readonly issues: readonly ConfigValidationIssue[];
+
+  constructor(message: string, issues: readonly ConfigValidationIssue[]) {
+    super(message);
+    this.name = "EnvValidationError";
+    this.issues = issues;
+  }
+}