import {  ProjectId,  ProviderInstanceId,  PullRequestOperationError,  ThreadId,  type OrchestrationCommand,  type OrchestrationProjectShell,  type OrchestrationShellSnapshot,  type OrchestrationThreadShell,  type PullRequestRef,  type PullRequestStack,  type PullRequestSummary,  type ThreadPullRequestLink,  type ThreadPullRequestSnapshot,} from "@t3tools/contracts";import { assert, describe, it } from "@effect/vitest";import * as Crypto from "effect/Crypto";import * as Deferred from "effect/Deferred";import * as Effect from "effect/Effect";import * as Layer from "effect/Layer";import * as Queue from "effect/Queue";import * as Ref from "effect/Ref";import * as Stream from "effect/Stream";import { TestClock } from "effect/testing"; import { PullRequestService } from "../pullRequest/PullRequestService.ts";import { ServerActivation } from "../serverActivation.ts";import {  OrchestrationEngineService,  type OrchestrationEngineShape,} from "./Services/OrchestrationEngine.ts";import { ProjectionSnapshotQuery } from "./Services/ProjectionSnapshotQuery.ts";import * as PullRequestSyncReactor from "./PullRequestSyncReactor.ts"; const NOW = "2026-08-28T12:00:00.000Z";const PROJECT_ID = ProjectId.make("sync-project"); type SyncCommand = Extract<  OrchestrationCommand,  { readonly type: "thread.pull-request-link.sync" }>;type LinkCommand = Extract<OrchestrationCommand, { readonly type: "thread.pull-request.link" }>; const testCrypto = Crypto.make({  randomBytes: (size) => new Uint8Array(size).fill(1),  digest: (_algorithm, data) => Effect.succeed(data),}); function makeProject(id: ProjectId = PROJECT_ID): OrchestrationProjectShell {  return {    id,    title: `Project ${id}`,    workspaceRoot: "/workspace/project",    defaultModelSelection: null,    scripts: [],    createdAt: "2026-08-01T00:00:00.000Z",    updatedAt: NOW,  };} function makeThread(  id: string,  overrides: Partial<OrchestrationThreadShell> = {},): OrchestrationThreadShell {  return {    id: ThreadId.make(id),    projectId: PROJECT_ID,    title: id,    modelSelection: {      instanceId: ProviderInstanceId.make("codex"),      model: "gpt-5",    },    runtimeMode: "full-access",    interactionMode: "default",    branch: null,    worktreePath: null,    pullRequests: [],    latestTurn: null,    createdAt: "2026-08-01T00:00:00.000Z",    updatedAt: "2026-08-20T00:00:00.000Z",    archivedAt: null,    settledOverride: null,    settledAt: null,    session: null,    latestUserMessageAt: "2026-08-20T00:00:00.000Z",    hasPendingApprovals: false,    hasPendingUserInput: false,    hasActionableProposedPlan: false,    ...overrides,  };} function makeLink(  number: number,  snapshot: Partial<ThreadPullRequestSnapshot> | null = null,  overrides: Partial<ThreadPullRequestLink> = {},): ThreadPullRequestLink {  return {    host: "github.com",    repository: "owner/repository",    number,    url: `https://github.com/owner/repository/pull/${number}`,    source: "manual",    linkedAt: "2026-08-10T00:00:00.000Z",    snapshot:      snapshot === null        ? null        : {            state: "open",            title: "Pull request",            headBranch: "feature",            baseBranch: "main",            isDraft: false,            updatedAt: "2026-08-27T00:00:00.000Z",            syncedAt: "2026-08-27T00:00:00.000Z",            ...snapshot,          },    stack: null,    ...overrides,  };} function makeSnapshot(  threads: ReadonlyArray<OrchestrationThreadShell>,  snapshotSequence = 1,): OrchestrationShellSnapshot {  return {    snapshotSequence,    projects: [makeProject()],    threads,    updatedAt: NOW,  };} function makeSummary(  input: PullRequestRef,  overrides: Partial<PullRequestSummary> = {},): PullRequestSummary {  return {    provider: "github",    projectId: input.projectId,    repository: input.repository,    number: input.number,    title: "Pull request",    url: `https://github.com/${input.repository}/pull/${input.number}`,    state: "open",    headBranch: "feature",    baseBranch: "main",    updatedAt: "2026-08-27T00:00:00.000Z",    ...overrides,  };} interface HarnessOptions {  readonly invalidate?: PullRequestService["Service"]["invalidate"];  readonly snapshot: OrchestrationShellSnapshot;  readonly summary?: (    input: PullRequestRef,  ) => Effect.Effect<PullRequestSummary, PullRequestOperationError>;  readonly stack?: (    input: PullRequestRef,  ) => Effect.Effect<PullRequestStack | null, PullRequestOperationError>;} const makeHarness = Effect.fn("makePullRequestSyncHarness")(function* (options: HarnessOptions) {  const activation = yield* Deferred.make<void>();  const snapshots = yield* Ref.make(options.snapshot);  const snapshotReads = yield* Queue.unbounded<void>();  const syncCommands = yield* Ref.make<ReadonlyArray<SyncCommand>>([]);  const linkCommands = yield* Ref.make<ReadonlyArray<LinkCommand>>([]);  const summaryCalls = yield* Ref.make<ReadonlyArray<PullRequestRef>>([]);  const stackCalls = yield* Ref.make<ReadonlyArray<PullRequestRef>>([]);   const summary: PullRequestService["Service"]["summary"] = (input, readOptions) =>    Effect.gen(function* () {      assert.strictEqual(readOptions?.recoverTransientFailure, false);      yield* Ref.update(summaryCalls, (calls) => [...calls, input]);      return yield* options.summary?.(input) ?? Effect.succeed(makeSummary(input));    });   const stack: PullRequestService["Service"]["stack"] = (input, readOptions) =>    Effect.gen(function* () {      assert.strictEqual(readOptions?.includeDetails, false);      yield* Ref.update(stackCalls, (calls) => [...calls, input]);      return yield* options.stack?.(input) ?? Effect.succeed(null);    });   const dispatch: OrchestrationEngineShape["dispatch"] = (command) => {    if (command.type === "thread.pull-request-link.sync") {      return Ref.update(syncCommands, (recorded) => [...recorded, command]).pipe(        Effect.as({ sequence: 1 }),      );    }    if (command.type === "thread.pull-request.link") {      return Ref.update(linkCommands, (recorded) => [...recorded, command]).pipe(        Effect.as({ sequence: 1 }),      );    }    return Effect.die(new Error(`Unexpected command: ${command.type}`));  };   const dependencies = Layer.mergeAll(    Layer.mock(ProjectionSnapshotQuery)({      getShellSnapshot: () =>        Queue.offer(snapshotReads, undefined).pipe(Effect.andThen(Ref.get(snapshots))),    }),    Layer.mock(PullRequestService)({      summary,      stack,      invalidate: options.invalidate ?? (() => Effect.void),    }),    Layer.mock(OrchestrationEngineService)({      readEvents: () => Stream.empty,      dispatch,      streamDomainEvents: Stream.empty,      latestSequence: Effect.succeed(0),    }),    Layer.succeed(ServerActivation, Deferred.await(activation)),    Layer.succeed(Crypto.Crypto, testCrypto),  );   return {    activation,    snapshots,    snapshotReads,    syncCommands,    linkCommands,    summaryCalls,    stackCalls,    layer: PullRequestSyncReactor.layer.pipe(Layer.provide(dependencies)),  };}); type Harness = Effect.Success<ReturnType<typeof makeHarness>>; const startAndSweep = Effect.fn("startPullRequestSyncHarness")(function* (fixture: Harness) {  const reactor = yield* PullRequestSyncReactor.PullRequestSyncReactor;  yield* reactor.start();  yield* Deferred.succeed(fixture.activation, undefined);  yield* Queue.take(fixture.snapshotReads);  yield* reactor.drain;  return reactor;}); const sweepAgain = Effect.fn("sweepPullRequestSyncHarness")(function* (  fixture: Harness,  reactor: PullRequestSyncReactor.PullRequestSyncReactor["Service"],) {  yield* TestClock.adjust("1 minute");  yield* Queue.take(fixture.snapshotReads);  yield* reactor.drain;}); /** What the reactor would have persisted, so the next sweep sees its own writes. */function applySync(  snapshot: OrchestrationShellSnapshot,  commands: ReadonlyArray<SyncCommand>,): OrchestrationShellSnapshot {  return {    ...snapshot,    snapshotSequence: snapshot.snapshotSequence + 1,    threads: snapshot.threads.map((thread) => ({      ...thread,      pullRequests: thread.pullRequests.map((link) => {        const command = commands.findLast(          (candidate) => candidate.threadId === thread.id && candidate.number === link.number,        );        return command === undefined          ? link          : { ...link, snapshot: command.snapshot, stack: command.stack };      }),    })),  };} describe("PullRequestSyncReactor", () => {  it.effect("retries a failed stack read after the summary becomes terminal", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        let attempts = 0;        const nativeStack: PullRequestStack = {          id: "stack",          number: 7,          url: "https://github.com/owner/repository/stacks/7",          base: "main",          layers: [{ number: 7, headBranch: "feature", state: "merged" }],        };        const fixture = yield* makeHarness({          snapshot: makeSnapshot([makeThread("one", { pullRequests: [makeLink(7)] })]),          summary: (input) =>            Effect.succeed(makeSummary(input, { state: "merged", mergedAt: NOW })),          stack: () =>            ++attempts === 1              ? Effect.fail(                  new PullRequestOperationError({                    operation: "stack",                    detail: "temporary failure",                  }),                )              : Effect.succeed(nativeStack),        });        yield* Effect.gen(function* () {          const reactor = yield* startAndSweep(fixture);          const commands = yield* Ref.get(fixture.syncCommands);          yield* Ref.update(fixture.snapshots, (snapshot) => applySync(snapshot, commands));          yield* sweepAgain(fixture, reactor);          assert.strictEqual(attempts, 2);          assert.deepStrictEqual((yield* Ref.get(fixture.syncCommands)).at(-1)?.stack, {            kind: "native",            ...nativeStack,          });        }).pipe(Effect.provide(fixture.layer));      }),    ),  );   it.effect("explicit refresh reads a changed stack even when its PR summary is unchanged", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        const fixture = yield* makeHarness({          snapshot: makeSnapshot([makeThread("one", { pullRequests: [makeLink(7, {})] })]),        });        yield* Effect.gen(function* () {          const reactor = yield* startAndSweep(fixture);          assert.strictEqual((yield* Ref.get(fixture.stackCalls)).length, 0);          yield* reactor.requestSync({            host: "github.com",            repository: "owner/repository",            number: 7,          });          yield* Queue.take(fixture.snapshotReads);          yield* reactor.drain;          assert.strictEqual((yield* Ref.get(fixture.stackCalls)).length, 1);        }).pipe(Effect.provide(fixture.layer));      }),    ),  );  it.effect("snapshots an unsynced link once and writes it to the thread", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        const fixture = yield* makeHarness({          snapshot: makeSnapshot([makeThread("one", { pullRequests: [makeLink(42)] })]),          summary: (input) =>            Effect.succeed(makeSummary(input, { title: "Ship it", isDraft: true })),        });         yield* Effect.gen(function* () {          yield* startAndSweep(fixture);           assert.deepStrictEqual(yield* Ref.get(fixture.summaryCalls), [            {              projectId: PROJECT_ID,              host: "github.com",              repository: "owner/repository",              number: 42,            },          ]);          assert.deepStrictEqual(            (yield* Ref.get(fixture.syncCommands)).map(({ commandId: _, ...rest }) => rest),            [              {                type: "thread.pull-request-link.sync",                threadId: ThreadId.make("one"),                host: "github.com",                repository: "owner/repository",                number: 42,                snapshot: {                  state: "open",                  title: "Ship it",                  headBranch: "feature",                  baseBranch: "main",                  isDraft: true,                  updatedAt: "2026-08-27T00:00:00.000Z",                  syncedAt: NOW,                  closedAt: null,                  mergedAt: null,                },                stack: null,              },            ],          );          assert.strictEqual((yield* Ref.get(fixture.stackCalls)).length, 1);        }).pipe(Effect.provide(fixture.layer));      }),    ),  );   it.effect("asks the host once for a pull request shared by two threads", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        const fixture = yield* makeHarness({          snapshot: makeSnapshot([            makeThread("one", { pullRequests: [makeLink(42)] }),            makeThread("two", {              pullRequests: [makeLink(42, null, { repository: "Owner/Repository" })],            }),          ]),        });         yield* Effect.gen(function* () {          yield* startAndSweep(fixture);           assert.strictEqual((yield* Ref.get(fixture.summaryCalls)).length, 1);          const commands = yield* Ref.get(fixture.syncCommands);          assert.deepStrictEqual(            commands              .map((command) => [command.threadId, command.repository] as const)              .sort((left, right) => left[0].localeCompare(right[0])),            [              [ThreadId.make("one"), "owner/repository"],              [ThreadId.make("two"), "Owner/Repository"],            ],          );        }).pipe(Effect.provide(fixture.layer));      }),    ),  );   it.effect("dispatches nothing when the host snapshot is unchanged", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        const fixture = yield* makeHarness({          snapshot: makeSnapshot([makeThread("one", { pullRequests: [makeLink(42)] })]),        });         yield* Effect.gen(function* () {          const reactor = yield* startAndSweep(fixture);          const firstSweep = yield* Ref.get(fixture.syncCommands);          assert.strictEqual(firstSweep.length, 1);          yield* Ref.update(fixture.snapshots, (snapshot) => applySync(snapshot, firstSweep));           yield* sweepAgain(fixture, reactor);           // Still open on an active thread, so the host was asked again, but nothing changed.          assert.strictEqual((yield* Ref.get(fixture.summaryCalls)).length, 2);          assert.strictEqual((yield* Ref.get(fixture.stackCalls)).length, 1);          assert.strictEqual((yield* Ref.get(fixture.syncCommands)).length, 1);        }).pipe(Effect.provide(fixture.layer));      }),    ),  );   it.effect("refreshes closed links through the reactor's project after reopening elsewhere", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        const stale = yield* Ref.make(true);        const fixture = yield* makeHarness({          snapshot: makeSnapshot([            makeThread("first", { pullRequests: [makeLink(42, { state: "closed" })] }),            makeThread("second", {              projectId: ProjectId.make("second-project"),              pullRequests: [makeLink(42, { state: "closed" })],            }),          ]),          invalidate: ({ reference }) =>            reference?.projectId === makeProject().id && reference.host === "github.com"              ? Ref.set(stale, false)              : Effect.void,          summary: (input) =>            Ref.get(stale).pipe(              Effect.map((cached) => makeSummary(input, { state: cached ? "closed" : "open" })),            ),        });        yield* Effect.gen(function* () {          const reactor = yield* startAndSweep(fixture);          assert.strictEqual((yield* Ref.get(fixture.summaryCalls)).length, 1);          yield* reactor.requestSync({            host: "github.com",            repository: "owner/repository",            number: 42,          });          yield* Queue.take(fixture.snapshotReads);          yield* reactor.drain;          const commands = yield* Ref.get(fixture.syncCommands);          yield* Ref.update(fixture.snapshots, (snapshot) => applySync(snapshot, commands));          const snapshot = yield* Ref.get(fixture.snapshots);          assert.deepStrictEqual(            snapshot.threads.map((thread) => thread.pullRequests[0]?.snapshot?.state),            ["open", "open"],          );        }).pipe(Effect.provide(fixture.layer));      }),    ),  );   it.effect("stops asking the host once a pull request is merged", () =>    Effect.scoped(      Effect.gen(function* () {        yield* TestClock.setTime(Date.parse(NOW));        const fixture = yield* makeHarness({          snapshot: makeSnapshot([            makeThread("merged", { pullRequests: [makeLink(1, { state: "merged" })] }),          ]),        });

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