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JSON.parse(text) as { title?: string }[] : [];\n\tif (!parsedPulls[0]?.title) throw new Error(\"list_pull_requests returned no titles\");\n\n\treturn [\"Plan: \", `${planHeading}.`, \" Latest pull request: \", `${parsedPulls[0].title}.`];\n}\n\nexport function createFakeHarness(\n\t_settings: FakeHarnessSettings,\n): HarnessV1 & { shutdown(): Promise } {\n\treturn {\n\t\tspecificationVersion: \"harness-v1\",\n\t\tharnessId: \"e2e-fake\",\n\t\tbuiltinTools: {},\n\t\tsupportsBuiltinToolFiltering: true,\n\n\t\tasync doStart(startOptions: HarnessV1StartOptions): Promise {\n\t\t\treturn {\n\t\t\t\tsessionId: startOptions.sessionId,\n\t\t\t\tisResume: false,\n\n\t\t\t\tasync doPromptTurn(turn: HarnessV1PromptTurnOptions): Promise {\n\t\t\t\t\tlet available = new Set(turn.tools.map(spec => spec.name));\n\t\t\t\t\tfor (let toolName of SCRIPTED_TOOLS) {\n\t\t\t\t\t\tif (!available.has(toolName)) {\n\t\t\t\t\t\t\tthrow new Error(`e2e-fake harness expected host tool ${toolName}`);\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif (available.has(\"search_code\")) {\n\t\t\t\t\t\tthrow new Error(\"e2e-fake harness received a tool outside the GitHub allowlist\");\n\t\t\t\t\t}\n\n\t\t\t\t\tlet pending = new Map void;\n\t\t\t\t\t}>();\n\t\t\t\t\tlet results = new Map();\n\t\t\t\t\tlet settled = Promise.withResolvers();\n\t\t\t\t\tlet onAbort = () => {\n\t\t\t\t\t\tfor (let [toolCallId, entry] of pending) {\n\t\t\t\t\t\t\tentry.resolve({ output: \"The turn was aborted.\", isError: true });\n\t\t\t\t\t\t\tpending.delete(toolCallId);\n\t\t\t\t\t\t}\n\t\t\t\t\t\tsettled.resolve();\n\t\t\t\t\t};\n\t\t\t\t\tturn.abortSignal?.addEventListener(\"abort\", onAbort, { once: true });\n\n\t\t\t\t\tlet callTool = (\n\t\t\t\t\t\ttoolName: string,\n\t\t\t\t\t\ttoolCallId = crypto.randomUUID(),\n\t\t\t\t\t): Promise<{ output: unknown; isError?: boolean }> => {\n\t\t\t\t\t\tlet outcome = Promise.withResolvers<{ output: unknown; isError?: boolean }>();\n\t\t\t\t\t\tpending.set(toolCallId, { toolName, resolve: outcome.resolve });\n\t\t\t\t\t\tturn.emit({ type: \"tool-call\", toolCallId, toolName, input: \"{}\" });\n\t\t\t\t\t\treturn outcome.promise;\n\t\t\t\t\t};\n\n\t\t\t\t\tlet usage = {\n\t\t\t\t\t\tinputTokens: { total: 0, noCache: 0, cacheRead: 0, cacheWrite: 0 },\n\t\t\t\t\t\toutputTokens: { total: 0, text: 0, reasoning: 0 },\n\t\t\t\t\t};\n\t\t\t\t\tlet pause = () => new Promise(resolve => setTimeout(resolve, STEP_MS));\n\n\t\t\t\t\tif (promptText(turn.prompt).includes(SLOW_PROMPT)) {\n\t\t\t\t\t\tvoid (async () => {\n\t\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\t\tlet toolCallId = crypto.randomUUID();\n\t\t\t\t\t\t\t\tturn.emit({ type: \"reasoning-start\", id: \"slow-thinking\" });\n\t\t\t\t\t\t\t\tturn.emit({\n\t\t\t\t\t\t\t\t\ttype: \"reasoning-delta\",\n\t\t\t\t\t\t\t\t\tid: \"slow-thinking\",\n\t\t\t\t\t\t\t\t\tdelta: \"Considering the plan.\",\n\t\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t\tturn.emit({ type: \"reasoning-end\", id: \"slow-thinking\" });\n\t\t\t\t\t\t\t\tturn.emit({ type: \"tool-input-start\", id: toolCallId, toolName: \"read_plan\" });\n\t\t\t\t\t\t\t\tawait pause();\n\t\t\t\t\t\t\t\tif (turn.abortSignal?.aborted) return;\n\t\t\t\t\t\t\t\tawait callTool(\"read_plan\", toolCallId);\n\t\t\t\t\t\t\t\tlet id = crypto.randomUUID();\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-start\", id });\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-delta\", id, delta: \"Streaming \" });\n\t\t\t\t\t\t\t\tawait pause();\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-delta\", id, delta: \"slowly\" });\n\t\t\t\t\t\t\t\tawait pause();\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-delta\", id, delta: \" now.\" });\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-end\", id });\n\t\t\t\t\t\t\t\tturn.emit({\n\t\t\t\t\t\t\t\t\ttype: \"finish-step\",\n\t\t\t\t\t\t\t\t\tfinishReason: { unified: \"stop\", raw: undefined },\n\t\t\t\t\t\t\t\t\tusage,\n\t\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t\tturn.emit({\n\t\t\t\t\t\t\t\t\ttype: \"finish\",\n\t\t\t\t\t\t\t\t\tfinishReason: { unified: \"stop\", raw: undefined },\n\t\t\t\t\t\t\t\t\ttotalUsage: usage,\n\t\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t\tsettled.resolve();\n\t\t\t\t\t\t\t} catch (err) {\n\t\t\t\t\t\t\t\tturn.emit({ type: \"error\", error: err });\n\t\t\t\t\t\t\t\tsettled.reject(err);\n\t\t\t\t\t\t\t} finally {\n\t\t\t\t\t\t\t\tturn.abortSignal?.removeEventListener(\"abort\", onAbort);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t})();\n\t\t\t\t\t} else {void (async () => {\n\t\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\t\tfor (let toolName of SCRIPTED_TOOLS) {\n\t\t\t\t\t\t\t\t\tif (turn.abortSignal?.aborted) return;\n\t\t\t\t\t\t\t\t\tresults.set(toolName, await callTool(toolName));\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\tif (turn.abortSignal?.aborted) return;\n\t\t\t\t\t\t\t\tlet chunks = deriveReply(results);\n\t\t\t\t\t\t\t\tlet id = crypto.randomUUID();\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-start\", id });\n\t\t\t\t\t\t\t\tfor (let chunk of chunks) turn.emit({ type: \"text-delta\", id, delta: chunk });\n\t\t\t\t\t\t\t\tturn.emit({ type: \"text-end\", id });\n\t\t\t\t\t\t\t\tturn.emit({\n\t\t\t\t\t\t\t\t\ttype: \"finish-step\",\n\t\t\t\t\t\t\t\t\tfinishReason: { unified: \"stop\", raw: undefined },\n\t\t\t\t\t\t\t\t\tusage,\n\t\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t\tturn.emit({\n\t\t\t\t\t\t\t\t\ttype: \"finish\",\n\t\t\t\t\t\t\t\t\tfinishReason: { unified: \"stop\", raw: undefined },\n\t\t\t\t\t\t\t\t\ttotalUsage: usage,\n\t\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t\tsettled.resolve();\n\t\t\t\t\t\t\t} catch (err) {\n\t\t\t\t\t\t\t\tturn.emit({ type: \"error\", error: err });\n\t\t\t\t\t\t\t\tsettled.reject(err);\n\t\t\t\t\t\t\t} finally {\n\t\t\t\t\t\t\t\tturn.abortSignal?.removeEventListener(\"abort\", onAbort);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t})();}\n\n\t\t\t\t\treturn {\n\t\t\t\t\t\tasync submitToolResult({ toolCallId, output, isError }) {\n\t\t\t\t\t\t\tlet entry = pending.get(toolCallId);\n\t\t\t\t\t\t\tif (!entry) return;\n\t\t\t\t\t\t\tpending.delete(toolCallId);\n\t\t\t\t\t\t\tturn.emit({\n\t\t\t\t\t\t\t\ttype: \"tool-result\",\n\t\t\t\t\t\t\t\ttoolCallId,\n\t\t\t\t\t\t\t\ttoolName: entry.toolName,\n\t\t\t\t\t\t\t\tresult: (output ?? null) as NonNullable,\n\t\t\t\t\t\t\t\tisError,\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\tentry.resolve({ output, isError });\n\t\t\t\t\t\t},\n\t\t\t\t\t\tasync submitToolApproval() {},\n\t\t\t\t\t\tdone: settled.promise,\n\t\t\t\t\t};\n\t\t\t\t},\n\n\t\t\t\tdoCompact: unsupported(\"compaction\"),\n\t\t\t\tdoContinueTurn: unsupported(\"continuing a suspended turn\"),\n\t\t\t\tdoSuspendTurn: unsupported(\"suspending a turn\"),\n\t\t\t\tdoDetach: unsupported(\"detaching from a live session\"),\n\t\t\t\tdoStop: unsupported(\"stopping with resumable state\"),\n\t\t\t\tasync doDestroy() {},\n\t\t\t};\n\t\t},\n\n\t\tasync shutdown() 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