From 69e8bab6efbc0394aecb9ce416eea27da755a5df Mon Sep 17 00:00:00 2001
From: Erik Kotsiuba <eko24old@gmail.com>
Date: Mon, 22 Jun 2026 01:10:11 +0200
Subject: [PATCH] feat: add remote ask event contract

Inspired-by: @S1M0N38 in PR #6
---
 README.md                |   2 +-
 docs/README.md           |   4 +-
 docs/architecture.md     |   2 +
 docs/contract.md         |  15 ++
 docs/remote-events.md    | 187 +++++++++++++
 package.json             |   2 +
 src/answer-commands.ts   |  34 ++-
 src/ask-tool.ts          |  18 +-
 src/index.ts             |   6 +-
 src/remote-ask.ts        | 559 +++++++++++++++++++++++++++++++++++++++
 src/ui/controller.ts     |  49 +++-
 tests/remote-ask.test.ts | 272 +++++++++++++++++++
 12 files changed, 1136 insertions(+), 14 deletions(-)
 create mode 100644 docs/remote-events.md
 create mode 100644 src/remote-ask.ts
 create mode 100644 tests/remote-ask.test.ts

diff --git a/README.md b/README.md
index 75082dd..563c85c 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 # @eko24ive/pi-ask
 
 [![npm downloads](https://badgen.net/npm/dm/@eko24ive/pi-ask)](https://www.npmjs.com/package/@eko24ive/pi-ask)
-[![last commit](https://badgen.net/github/last-commit/eko24ive/pi-ask?v=bf3c26d)](https://github.com/eko24ive/pi-ask/commits/main)
+[![last commit](https://badgen.net/github/last-commit/eko24ive/pi-ask?v=fa89c15)](https://github.com/eko24ive/pi-ask/commits/main)
 [![stars](https://badgen.net/github/stars/eko24ive/pi-ask)](https://github.com/eko24ive/pi-ask/stargazers)
 
 `@eko24ive/pi-ask` is an ask tool that cares about your answers.
diff --git a/docs/README.md b/docs/README.md
index f255a7a..8347c6c 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -5,7 +5,8 @@ This folder keeps only the documentation needed to understand and maintain the e
 ## Files
 
 - `configuration.md` — source of truth for configuring pi-ask keymaps, behaviour, and `/answer` extraction
-- `contract.md` — external behavior, full tool payload/result details, and UX guarantees
+- `contract.md` — external behavior, tool payload/result details, and UX guarantees
+- `remote-events.md` — local inter-extension event contract, bridge examples, and smoke-test steps
 - `architecture.md` — module boundaries and invariants
 - `../skills/ask-user/SKILL.md` — auto-bundled agent-side decision-gate guidance; enabled by default, but can be disabled via `pi config`; inspired by https://github.com/edlsh/pi-ask-user
 
@@ -13,6 +14,7 @@ This folder keeps only the documentation needed to understand and maintain the e
 
 - start with `configuration.md` for config-editing rules
 - read `contract.md` for behavior
+- read `remote-events.md` for local bridge/event integration
 - read `architecture.md` for code layout
 
 ## Local test run
diff --git a/docs/architecture.md b/docs/architecture.md
index fb562a0..50600ba 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -19,6 +19,7 @@ The codebase is split so the implementation reads through file boundaries and na
 - `src/answer-extraction.ts` — configured extraction model selection and raw-JSON extraction retries
 - `src/ask-payload-store.ts` — branch-aware persisted ask payload lookup
 - `src/notifications.ts` — best-effort ask notification payload rendering and channel execution
+- `src/remote-ask.ts` — package-prefixed local event contract, active-flow registry, and explicit remote submission validation
 - `src/schema.ts` — TypeBox schema
 - `src/types.ts` — shared types
 
@@ -86,6 +87,7 @@ The codebase is split so the implementation reads through file boundaries and na
 - legacy root config files are read as a fallback only when the current config file is absent; disk is left untouched
 - invalid config files are left untouched; defaults are loaded for the session with a notice
 - live config updates can affect an in-progress ask flow immediately
+- remote ask submissions must be explicit `answer` or `cancel` responses; pi-ask validates ids/values but never infers approve/deny semantics from labels or option values
 
 ## Documentation rule
 
diff --git a/docs/contract.md b/docs/contract.md
index ec7d3f9..b338e7f 100644
--- a/docs/contract.md
+++ b/docs/contract.md
@@ -267,6 +267,21 @@ The ask flow subscribes to runtime settings updates while open. In practice, thi
 
 When enabled, pi-ask emits one best-effort external notification per ask session after the ask UI opens and waits for input. The default title is `pi ask`; the message is `Question waiting: <label or prompt>`. Channels run in configured order and failures never fail or cancel the ask flow.
 
+## Remote inter-extension events
+
+pi-ask exposes a local `pi.events` contract for trusted Pi extensions. It does not expose a network API and does not automate terminal keystrokes.
+
+Channels:
+
+- `@eko24ive/pi-ask:started`
+- `@eko24ive/pi-ask:completed`
+- `@eko24ive/pi-ask:submit`
+- `@eko24ive/pi-ask:submit-result`
+
+Remote submissions must be explicit `{ kind: "answer" }` or `{ kind: "cancel" }` responses. Remote answers use question ids and normalized option values from the started event. pi-ask validates ids and values, recomputes labels/indices, and does not infer approval semantics from labels.
+
+See [`remote-events.md`](remote-events.md) for payload shapes, examples, and a local smoke test.
+
 ## Slash command replay/extraction
 
 - valid `ask_user` payloads are persisted as branch custom entries before the UI opens, so `/ask:replay` can reopen them after cancel, `/resume`, or `/tree`
diff --git a/docs/remote-events.md b/docs/remote-events.md
new file mode 100644
index 0000000..34654a7
--- /dev/null
+++ b/docs/remote-events.md
@@ -0,0 +1,187 @@
+# Remote ask events
+
+pi-ask exposes a local `pi.events` contract for trusted Pi extensions that run in the same Pi process.
+
+Use this for local bridges: status cards, desktop helpers, or approval UIs. Do not use terminal keystroke automation. pi-ask does not expose a network API.
+
+## Channels
+
+Lifecycle:
+
+- `@eko24ive/pi-ask:started`
+- `@eko24ive/pi-ask:completed`
+
+Remote submit:
+
+- `@eko24ive/pi-ask:submit`
+- `@eko24ive/pi-ask:submit-result`
+
+## Started
+
+Emitted after a validated ask UI flow opens.
+
+```ts
+type PiAskStartedEvent = {
+  version: 1;
+  flowId: string;
+  toolCallId?: string;
+  source: "tool" | "answer" | "answer:again" | "ask:replay";
+  title?: string;
+  questions: AskQuestion[];
+  createdAt: number;
+};
+```
+
+Use `flowId` for submit/correlation. Use `questions[].id` and `questions[].options[].value` for answers.
+
+## Submit an answer
+
+```ts
+pi.events.emit("@eko24ive/pi-ask:submit", {
+  version: 1,
+  requestId: `bridge-${Date.now()}`,
+  flowId,
+  response: {
+    kind: "answer",
+    mode: "submit",
+    answers: {
+      questionId: { values: ["option-value"] },
+    },
+  },
+});
+```
+
+Answer shape:
+
+```ts
+type PiAskRemoteAnswer = {
+  values?: string[];
+  customText?: string;
+  note?: string;
+  optionNotes?: Record<string, string>;
+};
+```
+
+Rules:
+
+- `values` must match option `value`s from the started event
+- keys in `answers` must match question ids
+- labels and indices are recomputed by pi-ask
+- a remote `answer` replaces the current answer set; stale UI answers are not merged
+- `mode` defaults to `"submit"`; use `"elaborate"` to complete as an elaboration request
+
+## Cancel
+
+```ts
+pi.events.emit("@eko24ive/pi-ask:submit", {
+  version: 1,
+  requestId: `bridge-${Date.now()}`,
+  flowId,
+  response: { kind: "cancel" },
+});
+```
+
+Cancel must be explicit. pi-ask does not infer cancel/approve/deny from labels or button names.
+
+## Submit result
+
+After a submit request, pi-ask emits:
+
+```ts
+type PiAskSubmitResultEvent =
+  | { version: 1; requestId: string; flowId: string; ok: true }
+  | {
+      version: 1;
+      requestId: string;
+      flowId: string;
+      ok: false;
+      error: "flow_not_found" | "invalid_request" | "invalid_answer";
+      message: string;
+    };
+```
+
+Correlate by `requestId` and `flowId`. Do not depend on strict ordering between `submit-result` and `completed`.
+
+## Completed
+
+Emitted when the flow resolves.
+
+```ts
+type PiAskCompletedEvent = {
+  version: 1;
+  flowId: string;
+  toolCallId?: string;
+  source: "tool" | "answer" | "answer:again" | "ask:replay";
+  result: AskResult;
+  completedAt: number;
+};
+```
+
+## Minimal bridge
+
+```ts
+export default function piAskBridge(pi: any) {
+  pi.events.on("@eko24ive/pi-ask:started", (event: any) => {
+    const question = event.questions[0];
+    const option = question.options[0];
+
+    pi.events.emit("@eko24ive/pi-ask:submit", {
+      version: 1,
+      requestId: `bridge-${Date.now()}`,
+      flowId: event.flowId,
+      response: {
+        kind: "answer",
+        answers: {
+          [question.id]: { values: [option.value] },
+        },
+      },
+    });
+  });
+
+  pi.events.on("@eko24ive/pi-ask:submit-result", (event: any) => {
+    if (!event.ok) console.error(event.error, event.message);
+  });
+}
+```
+
+Third-party integrations own their own UI policy and mappings. For example, a bridge may map a button to `{ values: ["yes"] }`, but pi-ask will never guess that mapping from the label.
+
+## Local smoke test
+
+Create a temporary bridge and run pi with only this repo extension plus the bridge:
+
+```bash
+cat > /tmp/pi-ask-smoke.ts <<'EOF'
+export default function smoke(pi: any) {
+  pi.events.on("@eko24ive/pi-ask:started", (event: any) => {
+    const q = event.questions[0];
+    setTimeout(() => {
+      pi.events.emit("@eko24ive/pi-ask:submit", {
+        version: 1,
+        requestId: `smoke-${Date.now()}`,
+        flowId: event.flowId,
+        response: { kind: "answer", answers: { [q.id]: { values: ["tool"] } } },
+      });
+    }, 2500);
+  });
+}
+EOF
+
+pi \
+  --no-extensions \
+  --no-skills \
+  --no-prompt-templates \
+  --no-themes \
+  --no-context-files \
+  -e "$PWD/src/index.ts" \
+  -e /tmp/pi-ask-smoke.ts \
+  --skill "$PWD/skills/ask-user"
+```
+
+Then ask Pi:
+
+```txt
+Use ask_user. Title: pi-ask smoke. Ask one single-select question id tool with options tool and nope.
+```
+
+The ask UI should open and auto-submit `tool` after about 2.5 seconds.
diff --git a/package.json b/package.json
index 5c8fafa..bf7f650 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,8 @@
     "src/",
     "skills/",
     "docs/configuration.md",
+    "docs/contract.md",
+    "docs/remote-events.md",
     "README.md",
     "LICENSE",
     "CHANGELOG.md"
diff --git a/src/answer-commands.ts b/src/answer-commands.ts
index 9598cdf..4deb064 100644
--- a/src/answer-commands.ts
+++ b/src/answer-commands.ts
@@ -19,6 +19,7 @@ import {
 	validateParams,
 } from "./ask-tool-helpers.ts";
 import { getAskConfigStore } from "./config/store.ts";
+import type { RemoteAskRuntime, RemoteAskSource } from "./remote-ask.ts";
 import type { AskParams, AskResult } from "./types.ts";
 import { runAskFlow } from "./ui/controller.ts";
 
@@ -37,11 +38,14 @@ type ExtractionUiResult =
 	| { error: string }
 	| { params: AskParams };
 
-export function registerAnswerCommands(pi: ExtensionAPI): void {
+export function registerAnswerCommands(
+	pi: ExtensionAPI,
+	remoteAsk?: RemoteAskRuntime
+): void {
 	pi.registerCommand("answer", {
 		description:
 			"Extract questions from the latest assistant message into an ask form",
-		handler: async (_args, ctx) => runAnswerCommand(pi, ctx),
+		handler: async (_args, ctx) => runAnswerCommand(pi, ctx, remoteAsk),
 	});
 
 	pi.registerCommand("answer:again", {
@@ -51,7 +55,9 @@ export function registerAnswerCommands(pi: ExtensionAPI): void {
 				missingMessage:
 					"No previous /answer form found on this branch; use /answer first.",
 				noticePrefix: "Reopening previous /answer form on this branch",
+				remoteSource: "answer:again",
 				source: "answer-extraction",
+				remoteAsk,
 			}),
 	});
 
@@ -61,14 +67,17 @@ export function registerAnswerCommands(pi: ExtensionAPI): void {
 			runReplayCommand(pi, ctx, {
 				missingMessage: "No previous ask_user form found on this branch.",
 				noticePrefix: "Replaying previous ask_user form on this branch",
+				remoteSource: "ask:replay",
 				source: "tool",
+				remoteAsk,
 			}),
 	});
 }
 
 async function runAnswerCommand(
 	pi: ExtensionAPI,
-	ctx: ExtensionCommandContext
+	ctx: ExtensionCommandContext,
+	remoteAsk?: RemoteAskRuntime
 ): Promise<void> {
 	if (!ctx.hasUI) {
 		ctx.ui.notify("/answer requires interactive UI.", "error");
@@ -115,6 +124,8 @@ async function runAnswerCommand(
 
 	await runAskAndSendSubmittedResult(pi, ctx, params, {
 		allowFreeform: true,
+		remoteAsk,
+		remoteSource: "answer",
 	});
 }
 
@@ -237,6 +248,8 @@ async function runReplayCommand(
 	options: {
 		missingMessage: string;
 		noticePrefix: string;
+		remoteAsk?: RemoteAskRuntime;
+		remoteSource: RemoteAskSource;
 		source: AskPayloadSource;
 	}
 ): Promise<void> {
@@ -260,6 +273,8 @@ async function runReplayCommand(
 	);
 	await runAskAndSendSubmittedResult(pi, ctx, lookup.data.params, {
 		allowFreeform: options.source === "answer-extraction",
+		remoteAsk: options.remoteAsk,
+		remoteSource: options.remoteSource,
 	});
 }
 
@@ -267,10 +282,19 @@ async function runAskAndSendSubmittedResult(
 	pi: Pick<ExtensionAPI, "sendUserMessage">,
 	ctx: ExtensionContext,
 	params: AskParams,
-	options: { allowFreeform: boolean }
+	options: {
+		allowFreeform: boolean;
+		remoteAsk?: RemoteAskRuntime;
+		remoteSource: RemoteAskSource;
+	}
 ): Promise<void> {
 	const result = await withHiddenWorkingRow(ctx, () =>
-		runAskFlow(ctx, params, options)
+		runAskFlow(ctx, params, {
+			allowFreeform: options.allowFreeform,
+			remote: options.remoteAsk
+				? { runtime: options.remoteAsk, source: options.remoteSource }
+				: undefined,
+		})
 	);
 	if (result.cancelled) {
 		ctx.ui.notify("Ask form cancelled.", "info");
diff --git a/src/ask-tool.ts b/src/ask-tool.ts
index 40589e0..48ea9d9 100644
--- a/src/ask-tool.ts
+++ b/src/ask-tool.ts
@@ -14,11 +14,15 @@ import {
 	validateParams,
 } from "./ask-tool-helpers.ts";
 import { getAskConfigStore } from "./config/store.ts";
+import type { RemoteAskRuntime } from "./remote-ask.ts";
 import { AskParamsSchema } from "./schema.ts";
 import type { AskParams } from "./types.ts";
 import { runAskFlow } from "./ui/controller.ts";
 
-export function registerAskTool(pi: ExtensionAPI) {
+export function registerAskTool(
+	pi: ExtensionAPI,
+	remoteAsk?: RemoteAskRuntime
+) {
 	pi.registerTool({
 		name: "ask_user",
 		label: "Ask User",
@@ -34,7 +38,8 @@ export function registerAskTool(pi: ExtensionAPI) {
 				params as AskParams,
 				signal,
 				onUpdate,
-				ctx
+				ctx,
+				remoteAsk
 			),
 		renderCall: renderAskToolCall,
 		renderResult: renderAskToolResult,
@@ -47,7 +52,8 @@ async function executeAskTool(
 	params: AskParams,
 	_signal: AbortSignal | undefined,
 	_onUpdate: unknown,
-	ctx: ExtensionContext
+	ctx: ExtensionContext,
+	remoteAsk?: RemoteAskRuntime
 ) {
 	const config = await getAskConfigStore().getConfig();
 	const validation = validateParams(params, {
@@ -66,7 +72,11 @@ async function executeAskTool(
 	}
 	ctx.ui.setWorkingVisible(false);
 	try {
-		const result = await runAskFlow(ctx, params);
+		const result = await runAskFlow(ctx, params, {
+			remote: remoteAsk
+				? { runtime: remoteAsk, source: "tool", toolCallId }
+				: undefined,
+		});
 		return successfulResponse(result);
 	} finally {
 		ctx.ui.setWorkingVisible(true);
diff --git a/src/index.ts b/src/index.ts
index 89202dd..eb5efcc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -4,6 +4,7 @@ import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
 import { registerAnswerCommands } from "./answer-commands.ts";
 import { registerAskSettingsCommand } from "./ask-settings-command.ts";
 import { registerAskTool } from "./ask-tool.ts";
+import { createRemoteAskRuntime } from "./remote-ask.ts";
 
 const PACKAGE_ROOT = resolve(dirname(fileURLToPath(import.meta.url)), "..");
 const CONFIGURATION_DOC_PATH = resolve(
@@ -17,7 +18,8 @@ export default function askExtension(pi: ExtensionAPI) {
 	pi.on("before_agent_start", async (event) => ({
 		systemPrompt: `${event.systemPrompt}\n\n${PI_ASK_CONFIG_PROMPT}`,
 	}));
-	registerAskTool(pi);
+	const remoteAsk = createRemoteAskRuntime(pi.events);
+	registerAskTool(pi, remoteAsk);
 	registerAskSettingsCommand(pi);
-	registerAnswerCommands(pi);
+	registerAnswerCommands(pi, remoteAsk);
 }
diff --git a/src/remote-ask.ts b/src/remote-ask.ts
new file mode 100644
index 0000000..d23ccd4
--- /dev/null
+++ b/src/remote-ask.ts
@@ -0,0 +1,559 @@
+import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
+import type {
+	AskQuestion,
+	AskResult,
+	AskSelectedOption,
+	AskState,
+	AskStateAnswer,
+} from "./types.ts";
+
+export const PI_ASK_STARTED_EVENT = "@eko24ive/pi-ask:started";
+export const PI_ASK_COMPLETED_EVENT = "@eko24ive/pi-ask:completed";
+export const PI_ASK_SUBMIT_EVENT = "@eko24ive/pi-ask:submit";
+export const PI_ASK_SUBMIT_RESULT_EVENT = "@eko24ive/pi-ask:submit-result";
+
+export type RemoteAskSource = "tool" | "answer" | "answer:again" | "ask:replay";
+
+export interface RemoteAskAnswer {
+	customText?: string;
+	note?: string;
+	optionNotes?: Record<string, string>;
+	values?: string[];
+}
+
+export type RemoteAskResponse =
+	| {
+			answers: Record<string, RemoteAskAnswer>;
+			kind: "answer";
+			mode?: "submit" | "elaborate";
+	  }
+	| { kind: "cancel" };
+
+export interface RemoteAskStartedEvent {
+	createdAt: number;
+	flowId: string;
+	questions: AskQuestion[];
+	source: RemoteAskSource;
+	title?: string;
+	toolCallId?: string;
+	version: 1;
+}
+
+export interface RemoteAskCompletedEvent {
+	completedAt: number;
+	flowId: string;
+	result: AskResult;
+	source: RemoteAskSource;
+	toolCallId?: string;
+	version: 1;
+}
+
+export interface RemoteAskSubmitEvent {
+	flowId: string;
+	requestId: string;
+	response: RemoteAskResponse;
+	version: 1;
+}
+
+export type RemoteAskSubmitError =
+	| "flow_not_found"
+	| "invalid_answer"
+	| "invalid_request";
+
+export type RemoteAskSubmitResultEvent = {
+	flowId: string;
+	requestId: string;
+	version: 1;
+} & (
+	| { ok: true }
+	| { error: RemoteAskSubmitError; message: string; ok: false }
+);
+
+export interface RemoteAskFlowOptions {
+	source: RemoteAskSource;
+	toolCallId?: string;
+}
+
+export interface RemoteAskFlowInput extends RemoteAskFlowOptions {
+	onSubmit: (response: RemoteAskResponse) => RemoteAskSubmitResolution;
+	questions: AskQuestion[];
+	title?: string;
+}
+
+interface ActiveRemoteAskFlow extends RemoteAskFlowInput {
+	flowId: string;
+}
+
+export type RemoteAskSubmitResolution =
+	| { ok: true }
+	| { error: RemoteAskSubmitError; message: string; ok: false };
+
+export interface RemoteAskFlowHandle {
+	complete: (result: AskResult) => void;
+	dispose: () => void;
+	flowId: string;
+}
+
+export interface RemoteAskRuntime {
+	startFlow: (flow: RemoteAskFlowInput) => RemoteAskFlowHandle;
+}
+
+type EventBus = ExtensionAPI["events"];
+
+export function createRemoteAskRuntime(events: EventBus): RemoteAskRuntime {
+	const activeFlows = new Map<string, ActiveRemoteAskFlow>();
+
+	events.on(PI_ASK_SUBMIT_EVENT, (data) => {
+		handleSubmitEvent(events, activeFlows, data);
+	});
+
+	return {
+		startFlow(flow) {
+			return startRemoteAskFlow(events, activeFlows, flow);
+		},
+	};
+}
+
+function handleSubmitEvent(
+	events: EventBus,
+	activeFlows: Map<string, ActiveRemoteAskFlow>,
+	data: unknown
+): void {
+	const request = parseSubmitEvent(data);
+	if (!request.ok) {
+		emitSubmitResult(events, {
+			version: 1,
+			requestId: request.requestId,
+			flowId: request.flowId,
+			ok: false,
+			error: "invalid_request",
+			message: request.message,
+		});
+		return;
+	}
+
+	const event = request.event;
+	const flow = activeFlows.get(event.flowId);
+	if (!flow) {
+		emitSubmitResult(events, failedSubmit(event));
+		return;
+	}
+
+	emitSubmitResult(events, {
+		version: 1,
+		requestId: event.requestId,
+		flowId: event.flowId,
+		...flow.onSubmit(event.response),
+	});
+}
+
+function startRemoteAskFlow(
+	events: EventBus,
+	activeFlows: Map<string, ActiveRemoteAskFlow>,
+	flow: RemoteAskFlowInput
+): RemoteAskFlowHandle {
+	const flowId = createFlowId(flow.toolCallId);
+	let completed = false;
+	activeFlows.set(flowId, { ...flow, flowId });
+	queueMicrotask(() => {
+		if (completed || !activeFlows.has(flowId)) {
+			return;
+		}
+		events.emit(PI_ASK_STARTED_EVENT, {
+			version: 1,
+			flowId,
+			toolCallId: flow.toolCallId,
+			source: flow.source,
+			title: flow.title,
+			questions: cloneQuestions(flow.questions),
+			createdAt: Date.now(),
+		} satisfies RemoteAskStartedEvent);
+	});
+
+	return {
+		flowId,
+		complete(result) {
+			if (completed) {
+				return;
+			}
+			completed = true;
+			activeFlows.delete(flowId);
+			events.emit(PI_ASK_COMPLETED_EVENT, {
+				version: 1,
+				flowId,
+				toolCallId: flow.toolCallId,
+				source: flow.source,
+				result,
+				completedAt: Date.now(),
+			} satisfies RemoteAskCompletedEvent);
+		},
+		dispose() {
+			if (completed) {
+				return;
+			}
+			activeFlows.delete(flowId);
+		},
+	};
+}
+
+function cloneQuestions(questions: AskQuestion[]): AskQuestion[] {
+	return questions.map((question) => ({
+		...question,
+		options: question.options.map((option) => ({ ...option })),
+	}));
+}
+
+function emitSubmitResult(
+	events: EventBus,
+	result: RemoteAskSubmitResultEvent
+): void {
+	events.emit(PI_ASK_SUBMIT_RESULT_EVENT, result);
+}
+
+function failedSubmit(event: RemoteAskSubmitEvent): RemoteAskSubmitResultEvent {
+	return {
+		version: 1,
+		requestId: event.requestId,
+		flowId: event.flowId,
+		ok: false,
+		error: "flow_not_found",
+		message: "Ask flow is not active.",
+	};
+}
+
+export function applyRemoteAskResponse(
+	state: AskState,
+	response: RemoteAskResponse
+): { state: AskState } & RemoteAskSubmitResolution {
+	if (response.kind === "cancel") {
+		return {
+			ok: true,
+			state: { ...state, cancelled: true, completed: true },
+		};
+	}
+
+	const validation = validateAnswerResponse(state, response);
+	if (!validation.ok) {
+		return { ...validation, state };
+	}
+
+	return {
+		ok: true,
+		state: {
+			...state,
+			answers: validation.answers,
+			activeTabIndex: state.questions.length,
+			activeSubmitActionIndex: response.mode === "elaborate" ? 1 : 0,
+			completed: true,
+			mode: response.mode ?? "submit",
+			view: { kind: "submit" },
+		},
+	};
+}
+
+function validateAnswerResponse(
+	state: AskState,
+	response: Extract<RemoteAskResponse, { kind: "answer" }>
+):
+	| { answers: Record<string, AskStateAnswer>; ok: true }
+	| { error: "invalid_answer"; message: string; ok: false } {
+	if (!isPlainObject(response.answers)) {
+		return invalidAnswer("Answer response must include an answers object.");
+	}
+	if (
+		response.mode &&
+		response.mode !== "submit" &&
+		response.mode !== "elaborate"
+	) {
+		return invalidAnswer('Answer mode must be "submit" or "elaborate".');
+	}
+
+	const answers: Record<string, AskStateAnswer> = {};
+	for (const [questionId, answer] of Object.entries(response.answers)) {
+		const question = state.questions.find(
+			(candidate) => candidate.id === questionId
+		);
+		if (!question) {
+			return invalidAnswer(`Unknown question id "${questionId}".`);
+		}
+		const normalized = normalizeRemoteAnswer(question, answer);
+		if (!normalized.ok) {
+			return normalized;
+		}
+		answers[questionId] = normalized.answer;
+	}
+
+	return { ok: true, answers };
+}
+
+function normalizeRemoteAnswer(
+	question: AskQuestion,
+	answer: unknown
+):
+	| { answer: AskStateAnswer; ok: true }
+	| { error: "invalid_answer"; message: string; ok: false } {
+	const parts = parseRemoteAnswerParts(question, answer);
+	if (!parts.ok) {
+		return parts;
+	}
+	const selected = normalizeSelectedValues(question, parts.values);
+	if (!selected.ok) {
+		return selected;
+	}
+	const optionNotes = normalizeOptionNotes(question, parts.optionNotes);
+	if (!optionNotes.ok) {
+		return optionNotes;
+	}
+
+	const trimmedCustomText = parts.customText?.trim();
+	return {
+		ok: true,
+		answer: {
+			selected: selected.selected,
+			customSelected: trimmedCustomText ? true : undefined,
+			customText: trimmedCustomText ? parts.customText : undefined,
+			note: parts.note?.trim() ? parts.note : undefined,
+			optionNotes: optionNotes.optionNotes,
+		},
+	};
+}
+
+function parseRemoteAnswerParts(
+	question: AskQuestion,
+	answer: unknown
+):
+	| {
+			customText?: string;
+			note?: string;
+			ok: true;
+			optionNotes?: Record<string, string>;
+			values: string[];
+	  }
+	| { error: "invalid_answer"; message: string; ok: false } {
+	if (!isPlainObject(answer)) {
+		return invalidAnswer(
+			`Answer for question "${question.id}" must be an object.`
+		);
+	}
+	if (answer.values !== undefined && !isStringArray(answer.values)) {
+		return invalidAnswer(
+			`Answer values for question "${question.id}" must be strings.`
+		);
+	}
+	const values = answer.values ?? [];
+	const scalarError = validateRemoteAnswerScalars(question, answer, values);
+	if (scalarError) {
+		return scalarError;
+	}
+	return {
+		ok: true,
+		values,
+		customText: answer.customText as string | undefined,
+		note: answer.note as string | undefined,
+		optionNotes: answer.optionNotes as Record<string, string> | undefined,
+	};
+}
+
+function validateRemoteAnswerScalars(
+	question: AskQuestion,
+	answer: Record<string, unknown>,
+	values: string[]
+): { error: "invalid_answer"; message: string; ok: false } | undefined {
+	if (new Set(values).size !== values.length) {
+		return invalidAnswer(
+			`Answer values for question "${question.id}" must be unique.`
+		);
+	}
+	if (question.type !== "multi" && values.length > 1) {
+		return invalidAnswer(
+			`Question "${question.id}" accepts only one selected value.`
+		);
+	}
+	if (
+		answer.customText !== undefined &&
+		typeof answer.customText !== "string"
+	) {
+		return invalidAnswer(
+			`Custom text for question "${question.id}" must be a string.`
+		);
+	}
+	if (
+		typeof answer.customText === "string" &&
+		answer.customText.trim() &&
+		question.type !== "multi" &&
+		values.length > 0
+	) {
+		return invalidAnswer(
+			`Question "${question.id}" cannot combine a selected value and custom text.`
+		);
+	}
+	if (answer.note !== undefined && typeof answer.note !== "string") {
+		return invalidAnswer(
+			`Note for question "${question.id}" must be a string.`
+		);
+	}
+	if (answer.optionNotes !== undefined && !isStringRecord(answer.optionNotes)) {
+		return invalidAnswer(
+			`Option notes for question "${question.id}" must be string values.`
+		);
+	}
+}
+
+function normalizeSelectedValues(
+	question: AskQuestion,
+	values: string[]
+):
+	| { ok: true; selected: AskSelectedOption[] }
+	| { error: "invalid_answer"; message: string; ok: false } {
+	const selected: AskSelectedOption[] = [];
+	for (const value of values) {
+		const optionIndex = question.options.findIndex(
+			(option) => option.value === value
+		);
+		if (optionIndex < 0) {
+			return invalidAnswer(
+				`Unknown option value "${value}" for question "${question.id}".`
+			);
+		}
+		const option = question.options[optionIndex];
+		selected.push({
+			value: option.value,
+			label: option.label,
+			index: optionIndex + 1,
+		});
+	}
+	return { ok: true, selected };
+}
+
+function normalizeOptionNotes(
+	question: AskQuestion,
+	optionNotes: Record<string, string> | undefined
+):
+	| { ok: true; optionNotes?: Record<string, string> }
+	| { error: "invalid_answer"; message: string; ok: false } {
+	const entries = Object.entries(optionNotes ?? {}).filter(([, value]) =>
+		value.trim()
+	);
+	for (const [value] of entries) {
+		if (!question.options.some((option) => option.value === value)) {
+			return invalidAnswer(
+				`Unknown option note value "${value}" for question "${question.id}".`
+			);
+		}
+	}
+	return {
+		ok: true,
+		optionNotes: entries.length > 0 ? Object.fromEntries(entries) : undefined,
+	};
+}
+
+function parseSubmitEvent(
+	data: unknown
+):
+	| { event: RemoteAskSubmitEvent; ok: true }
+	| { flowId: string; message: string; ok: false; requestId: string } {
+	const fallback = { requestId: "", flowId: "" };
+	if (!isPlainObject(data)) {
+		return {
+			...fallback,
+			ok: false,
+			message: "Submit event must be an object.",
+		};
+	}
+	const requestId = typeof data.requestId === "string" ? data.requestId : "";
+	const flowId = typeof data.flowId === "string" ? data.flowId : "";
+	if (data.version !== 1) {
+		return {
+			requestId,
+			flowId,
+			ok: false,
+			message: "Submit event version must be 1.",
+		};
+	}
+	if (!requestId) {
+		return {
+			requestId,
+			flowId,
+			ok: false,
+			message: "Submit event requestId is required.",
+		};
+	}
+	if (!flowId) {
+		return {
+			requestId,
+			flowId,
+			ok: false,
+			message: "Submit event flowId is required.",
+		};
+	}
+	const response = parseRemoteResponse(data.response);
+	if (!response.ok) {
+		return { requestId, flowId, ok: false, message: response.message };
+	}
+	return {
+		ok: true,
+		event: {
+			version: 1,
+			requestId,
+			flowId,
+			response: response.response,
+		},
+	};
+}
+
+function parseRemoteResponse(
+	data: unknown
+): { ok: true; response: RemoteAskResponse } | { message: string; ok: false } {
+	if (!isPlainObject(data)) {
+		return { ok: false, message: "Submit response must be an object." };
+	}
+	if (data.kind === "cancel") {
+		return { ok: true, response: { kind: "cancel" } };
+	}
+	if (data.kind === "answer") {
+		return {
+			ok: true,
+			response: {
+				kind: "answer",
+				answers: data.answers as Record<string, RemoteAskAnswer>,
+				mode: data.mode as "submit" | "elaborate" | undefined,
+			},
+		};
+	}
+	return {
+		ok: false,
+		message: 'Submit response kind must be "answer" or "cancel".',
+	};
+}
+
+function invalidAnswer(message: string): {
+	error: "invalid_answer";
+	message: string;
+	ok: false;
+} {
+	return { ok: false, error: "invalid_answer", message };
+}
+
+function createFlowId(toolCallId?: string): string {
+	if (toolCallId) {
+		return `tool:${toolCallId}`;
+	}
+	return `flow:${Date.now()}:${Math.random().toString(36).slice(2)}`;
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+	return !!value && typeof value === "object" && !Array.isArray(value);
+}
+
+function isStringArray(value: unknown): value is string[] {
+	return (
+		Array.isArray(value) && value.every((item) => typeof item === "string")
+	);
+}
+
+function isStringRecord(value: unknown): value is Record<string, string> {
+	return (
+		isPlainObject(value) &&
+		Object.values(value).every((item) => typeof item === "string")
+	);
+}
diff --git a/src/ui/controller.ts b/src/ui/controller.ts
index f9f11ad..7f861f8 100644
--- a/src/ui/controller.ts
+++ b/src/ui/controller.ts
@@ -6,6 +6,14 @@ import {
 	createQuestionWaitingNotification,
 	notifyQuestionWaiting,
 } from "../notifications.ts";
+import {
+	applyRemoteAskResponse,
+	type RemoteAskFlowHandle,
+	type RemoteAskResponse,
+	type RemoteAskRuntime,
+	type RemoteAskSource,
+	type RemoteAskSubmitResolution,
+} from "../remote-ask.ts";
 import { createInitialState } from "../state/create.ts";
 import {
 	getEditorDraft,
@@ -60,6 +68,11 @@ type Done = (result: AskResult) => void;
 interface AskFlowOptions {
 	allowFreeform?: boolean;
 	presentSingleAsMulti?: boolean;
+	remote?: {
+		runtime: RemoteAskRuntime;
+		source: RemoteAskSource;
+		toolCallId?: string;
+	};
 }
 
 type AskFlowParams = AskParams &
@@ -79,6 +92,7 @@ interface AskFlowController {
 	editor: Editor;
 	pendingQuestionTypeChangeQuestionId?: string;
 	pendingReviewShortcutActionIndex?: number;
+	remoteFlow?: RemoteAskFlowHandle;
 	settingsOpen: boolean;
 	state: AskState;
 	suppressAutoInputForSelection: boolean;
@@ -151,6 +165,7 @@ function createAskFlowController(
 	});
 
 	controller.editor.onSubmit = (value) => submitEditor(controller, value);
+	controller.remoteFlow = startRemoteFlow(controller, params);
 	syncSelection(controller);
 	notifyCurrentQuestion(controller).catch(() => {
 		// Notification failures are best-effort and must not affect the ask flow.
@@ -165,6 +180,7 @@ function createAskFlowController(
 			handleControllerInput(controller, data);
 		},
 		dispose() {
+			controller.remoteFlow?.dispose();
 			controller.unsubscribeConfig();
 		},
 	};
@@ -545,10 +561,41 @@ async function notifyCurrentQuestion(
 
 function maybeFinish(controller: AskFlowController) {
 	if (controller.state.completed) {
-		controller.done(toAskResult(controller.state));
+		const result = toAskResult(controller.state);
+		controller.remoteFlow?.complete(result);
+		controller.done(result);
 	}
 }
 
+function startRemoteFlow(
+	controller: AskFlowController,
+	params: AskFlowParams
+): RemoteAskFlowHandle | undefined {
+	const remote = params.flowOptions.remote;
+	if (!remote) {
+		return;
+	}
+	return remote.runtime.startFlow({
+		source: remote.source,
+		toolCallId: remote.toolCallId,
+		title: controller.state.title,
+		questions: controller.state.questions,
+		onSubmit: (response) => submitRemoteResponse(controller, response),
+	});
+}
+
+function submitRemoteResponse(
+	controller: AskFlowController,
+	response: RemoteAskResponse
+): RemoteAskSubmitResolution {
+	const resolution = applyRemoteAskResponse(controller.state, response);
+	if (!resolution.ok) {
+		return resolution;
+	}
+	commitState(controller, resolution.state, { finish: true });
+	return { ok: true };
+}
+
 function hydrateEditor(controller: AskFlowController) {
 	controller.editor.setText(getEditorDraft(controller.state));
 }
diff --git a/tests/remote-ask.test.ts b/tests/remote-ask.test.ts
new file mode 100644
index 0000000..eba6961
--- /dev/null
+++ b/tests/remote-ask.test.ts
@@ -0,0 +1,272 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { DEFAULT_ASK_CONFIG } from "../src/config/defaults.ts";
+import { getAskConfigStore } from "../src/config/store.ts";
+import {
+	applyRemoteAskResponse,
+	createRemoteAskRuntime,
+	PI_ASK_COMPLETED_EVENT,
+	PI_ASK_STARTED_EVENT,
+	PI_ASK_SUBMIT_EVENT,
+	PI_ASK_SUBMIT_RESULT_EVENT,
+	type RemoteAskCompletedEvent,
+	type RemoteAskStartedEvent,
+	type RemoteAskSubmitResultEvent,
+} from "../src/remote-ask.ts";
+import { createInitialState } from "../src/state/create.ts";
+import { runAskFlow } from "../src/ui/controller.ts";
+
+const UNKNOWN_APPROVE_VALUE_RE = /Unknown option value "approve"/;
+
+class TestEventBus {
+	readonly events: Array<{ channel: string; data: unknown }> = [];
+	private readonly handlers = new Map<string, Array<(data: unknown) => void>>();
+
+	emit(channel: string, data: unknown): void {
+		this.events.push({ channel, data });
+		for (const handler of this.handlers.get(channel) ?? []) {
+			handler(data);
+		}
+	}
+
+	on(channel: string, handler: (data: unknown) => void): () => void {
+		const handlers = this.handlers.get(channel) ?? [];
+		handlers.push(handler);
+		this.handlers.set(channel, handlers);
+		return () => {
+			this.handlers.set(
+				channel,
+				(this.handlers.get(channel) ?? []).filter(
+					(candidate) => candidate !== handler
+				)
+			);
+		};
+	}
+}
+
+test("remote answer response validates and serializes explicit option values", () => {
+	const state = createInitialState({
+		questions: [
+			{
+				id: "decision",
+				prompt: "Proceed?",
+				options: [
+					{ value: "yes", label: "Yes" },
+					{ value: "no", label: "No" },
+				],
+			},
+		],
+	});
+
+	const result = applyRemoteAskResponse(state, {
+		kind: "answer",
+		answers: {
+			decision: { values: ["yes"], note: "ship it" },
+		},
+	});
+
+	assert.equal(result.ok, true);
+	assert.equal(result.state.completed, true);
+	assert.deepEqual(result.state.answers.decision, {
+		selected: [{ value: "yes", label: "Yes", index: 1 }],
+		note: "ship it",
+		customSelected: undefined,
+		customText: undefined,
+		optionNotes: undefined,
+	});
+});
+
+test("remote answer response replaces stale UI answers", () => {
+	const state = createInitialState({
+		questions: [
+			{
+				id: "decision",
+				prompt: "Proceed?",
+				options: [{ value: "yes", label: "Yes" }],
+			},
+			{
+				id: "stale",
+				prompt: "Old answer?",
+				options: [{ value: "old", label: "Old" }],
+			},
+		],
+	});
+	state.answers.stale = {
+		selected: [{ value: "old", label: "Old", index: 1 }],
+	};
+
+	const result = applyRemoteAskResponse(state, {
+		kind: "answer",
+		answers: { decision: { values: ["yes"] } },
+	});
+
+	assert.equal(result.ok, true);
+	assert.deepEqual(Object.keys(result.state.answers), ["decision"]);
+});
+
+test("remote answer response rejects guessed or unknown option values", () => {
+	const state = createInitialState({
+		questions: [
+			{
+				id: "decision",
+				prompt: "Proceed?",
+				options: [{ value: "yes", label: "Yes" }],
+			},
+		],
+	});
+
+	const result = applyRemoteAskResponse(state, {
+		kind: "answer",
+		answers: { decision: { values: ["approve"] } },
+	});
+
+	assert.equal(result.ok, false);
+	assert.equal(result.error, "invalid_answer");
+	assert.match(result.message, UNKNOWN_APPROVE_VALUE_RE);
+	assert.equal(result.state.completed, false);
+});
+
+test("remote cancel completes the flow as cancelled", () => {
+	const state = createInitialState({
+		questions: [
+			{
+				id: "decision",
+				prompt: "Proceed?",
+				options: [{ value: "yes", label: "Yes" }],
+			},
+		],
+	});
+
+	const result = applyRemoteAskResponse(state, { kind: "cancel" });
+
+	assert.equal(result.ok, true);
+	assert.equal(result.state.completed, true);
+	assert.equal(result.state.cancelled, true);
+});
+
+test("started event questions are cloned", async () => {
+	const bus = new TestEventBus();
+	const remoteAsk = createRemoteAskRuntime(bus as never);
+	const questions = createInitialState({
+		questions: [
+			{
+				id: "decision",
+				prompt: "Proceed?",
+				options: [{ value: "yes", label: "Yes" }],
+			},
+		],
+	}).questions;
+
+	remoteAsk.startFlow({
+		source: "tool",
+		questions,
+		onSubmit: () => ({ ok: true }),
+	});
+	await new Promise((resolve) => setImmediate(resolve));
+
+	const started = bus.events.find(
+		(event) => event.channel === PI_ASK_STARTED_EVENT
+	)?.data as RemoteAskStartedEvent;
+	started.questions[0].options[0].label = "Mutated";
+
+	assert.equal(questions[0].options[0].label, "Yes");
+});
+
+test("remote submit resolves an active ask flow and emits lifecycle events", async () => {
+	getAskConfigStore().setConfig({
+		...DEFAULT_ASK_CONFIG,
+		notifications: { ...DEFAULT_ASK_CONFIG.notifications, enabled: false },
+	});
+	const bus = new TestEventBus();
+	const remoteAsk = createRemoteAskRuntime(bus as never);
+	let component: { handleInput(data: string): void } | undefined;
+
+	bus.on(PI_ASK_STARTED_EVENT, (data) => {
+		const event = data as RemoteAskStartedEvent;
+		bus.emit(PI_ASK_SUBMIT_EVENT, {
+			version: 1,
+			requestId: "request-1",
+			flowId: event.flowId,
+			response: {
+				kind: "answer",
+				answers: { decision: { values: ["yes"] } },
+			},
+		});
+	});
+
+	const result = await runAskFlow(
+		{
+			cwd: process.cwd(),
+			ui: {
+				custom(callback: (...args: unknown[]) => unknown) {
+					return new Promise((resolve) => {
+						component = callback(
+							{
+								requestRender() {
+									// Rendering is not needed for this controller input test.
+								},
+							},
+							plainTheme(),
+							{},
+							resolve
+						) as typeof component;
+					});
+				},
+			},
+		} as never,
+		{
+			questions: [
+				{
+					id: "decision",
+					prompt: "Proceed?",
+					options: [
+						{ value: "yes", label: "Yes" },
+						{ value: "no", label: "No" },
+					],
+				},
+			],
+		},
+		{ remote: { runtime: remoteAsk, source: "tool", toolCallId: "call-1" } }
+	);
+
+	assert(component);
+	assert.deepEqual(result.answers.decision, {
+		values: ["yes"],
+		labels: ["Yes"],
+		indices: [1],
+		customText: undefined,
+		note: undefined,
+		optionNotes: undefined,
+	});
+
+	const started = bus.events.find(
+		(event) => event.channel === PI_ASK_STARTED_EVENT
+	)?.data as RemoteAskStartedEvent;
+	assert.equal(started.flowId, "tool:call-1");
+	assert.equal(started.source, "tool");
+	assert.equal(started.questions[0]?.id, "decision");
+
+	const submitResult = bus.events.find(
+		(event) => event.channel === PI_ASK_SUBMIT_RESULT_EVENT
+	)?.data as RemoteAskSubmitResultEvent;
+	assert.equal(submitResult.ok, true);
+
+	const completed = bus.events.find(
+		(event) => event.channel === PI_ASK_COMPLETED_EVENT
+	)?.data as RemoteAskCompletedEvent;
+	assert.equal(completed.flowId, "tool:call-1");
+	assert.equal(completed.result.cancelled, false);
+
+	getAskConfigStore().setConfig(DEFAULT_ASK_CONFIG);
+});
+
+function plainTheme() {
+	return {
+		bg(_color: string, text: string) {
+			return text;
+		},
+		fg(_color: string, text: string) {
+			return text;
+		},
+	};
+}