chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/agent/test/harness/jsonl-session-repo-conformance.test.ts

@@ -0,0 +1,61 @@
+import { describe, it } from "vitest";
+import { BACKGROUND_CONTEXT } from "../../src/harness/context.ts";
+import { NodeExecutionEnv } from "../../src/harness/env/nodejs.ts";
+import { type JsonlSessionMetadata, JsonlSessionRepo } from "../../src/harness/session/jsonl/index.ts";
+import {
+	type ConformanceCase,
+	createSessionRepoForkBehaviorConformance,
+	createSessionRepoForkSourceSnapshotConformance,
+	createSessionRepoLifecycleConformance,
+	createSessionRepoMessageConformance,
+	createSessionRepoOwnershipConformance,
+} from "../../src/harness/session/testing/index.ts";
+import type { ForkOptions } from "../../src/harness/session/types.ts";
+import { createTempDir } from "./session-test-utils.ts";
+
+const NOW = 1_700_000_000_000;
+const CONFORMANCE_CWD = "/workspace";
+
+function registerConformance(name: string, cases: readonly ConformanceCase[]): void {
+	describe(name, () => {
+		for (const group of new Set(cases.map((testCase) => testCase.group))) {
+			describe(group, () => {
+				for (const testCase of cases.filter((candidate) => candidate.group === group)) {
+					it(testCase.name, () => testCase.run());
+				}
+			});
+		}
+	});
+}
+
+let jsonlRepo: JsonlSessionRepo;
+async function createConformanceRepo() {
+	const fileSystem = new NodeExecutionEnv({ cwd: createTempDir() });
+	jsonlRepo = new JsonlSessionRepo({ fileSystem, sessionsRoot: "sessions", now: () => NOW });
+	return {
+		create: (options: { id?: string; parentSessionId?: string }) =>
+			jsonlRepo.create({ ...options, cwd: CONFORMANCE_CWD }, BACKGROUND_CONTEXT),
+		open: (metadata: JsonlSessionMetadata) => jsonlRepo.open(metadata, BACKGROUND_CONTEXT),
+		list: () => jsonlRepo.list({ cwd: CONFORMANCE_CWD }, BACKGROUND_CONTEXT),
+		delete: (metadata: JsonlSessionMetadata) => jsonlRepo.delete(metadata, BACKGROUND_CONTEXT),
+		fork: (source: JsonlSessionMetadata, options: ForkOptions) => jsonlRepo.fork(source, options, BACKGROUND_CONTEXT),
+	};
+}
+
+registerConformance("JsonlSessionRepo conformance", [
+	...createSessionRepoLifecycleConformance<JsonlSessionMetadata>(createConformanceRepo, () =>
+		jsonlRepo.close(BACKGROUND_CONTEXT),
+	),
+	...createSessionRepoOwnershipConformance<JsonlSessionMetadata>(createConformanceRepo, () =>
+		jsonlRepo.close(BACKGROUND_CONTEXT),
+	),
+	...createSessionRepoMessageConformance<JsonlSessionMetadata>(createConformanceRepo, () =>
+		jsonlRepo.close(BACKGROUND_CONTEXT),
+	),
+	...createSessionRepoForkBehaviorConformance<JsonlSessionMetadata>(createConformanceRepo, () =>
+		jsonlRepo.close(BACKGROUND_CONTEXT),
+	),
+	...createSessionRepoForkSourceSnapshotConformance<JsonlSessionMetadata>(createConformanceRepo, () =>
+		jsonlRepo.close(BACKGROUND_CONTEXT),
+	),
+]);