import { Schema } from "effect";import type { ProjectionRepositoryError } from "../persistence/Errors.ts";import { GitCommandError } from "@t3tools/contracts"; /** * CheckpointUnavailableError - Expected checkpoint does not exist. */export class CheckpointUnavailableError extends Schema.TaggedErrorClass<CheckpointUnavailableError>()(  "CheckpointUnavailableError",  {    threadId: Schema.String,    turnCount: Schema.Number,    detail: Schema.String,    cause: Schema.optional(Schema.Defect),  },) {  override get message(): string {    return `Checkpoint unavailable for thread ${this.threadId} turn ${this.turnCount}: ${this.detail}`;  }} /** * CheckpointInvariantError - Inconsistent provider/filesystem/catalog state. */export class CheckpointInvariantError extends Schema.TaggedErrorClass<CheckpointInvariantError>()(  "CheckpointInvariantError",  {    operation: Schema.String,    detail: Schema.String,    cause: Schema.optional(Schema.Defect),  },) {  override get message(): string {    return `Checkpoint invariant violation in ${this.operation}: ${this.detail}`;  }} export type CheckpointStoreError =  | GitCommandError  | CheckpointInvariantError  | CheckpointUnavailableError; export type CheckpointServiceError = CheckpointStoreError | ProjectionRepositoryError;