feat(ql3): establish 3.0 incubation baseline

back/runtime/application/commandErrors.ts

@@ -0,0 +1,33 @@
+import type { RunAttemptStatus } from '../domain/run';
+
+export class RunCommandError extends Error {
+  constructor(message: string, public readonly code: string) {
+    super(message);
+    this.name = new.target.name;
+  }
+}
+
+export class RunNotFoundError extends RunCommandError {
+  constructor(public readonly runId: string) {
+    super('Run does not exist', 'RUN_NOT_FOUND');
+  }
+}
+
+export class RunAttemptNotFoundError extends RunCommandError {
+  constructor(public readonly attemptId: string) {
+    super('RunAttempt does not exist', 'RUN_ATTEMPT_NOT_FOUND');
+  }
+}
+
+export class RunAttemptConcurrentWriteError extends RunCommandError {
+  constructor(
+    public readonly attemptId: string,
+    public readonly expectedStatus: RunAttemptStatus,
+    public readonly expectedCallbackSequence: number,
+  ) {
+    super(
+      'RunAttempt changed while applying the command',
+      'RUN_ATTEMPT_CONCURRENT_WRITE',
+    );
+  }
+}