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import type { AgentMessage } from "@mariozechner/pi-agent-core";
import type { TextContent } from "@mariozechner/pi-ai";
import type { ExtensionAPI, ExtensionContext } from "@mariozechner/pi-coding-agent";
import { isSafeAskModeCommand } from "./utils.js";
const ASK_MODE_TOOLS = ["read", "bash", "grep", "find", "ls"];
const STATE_TYPE = "ask-mode";
const CONTEXT_TYPE = "ask-mode-context";
interface AskModeState {
enabled: boolean;
normalTools: string[];
}
function hasAskModeMarker(message: AgentMessage): boolean {
const customMessage = message as AgentMessage & { customType?: string };
if (customMessage.customType === CONTEXT_TYPE) return true;
if (message.role !== "user") return false;
if (typeof message.content === "string") return message.content.includes("[ASK MODE ACTIVE]");
if (!Array.isArray(message.content)) return false;
return message.content.some(
(block) => block.type === "text" && (block as TextContent).text?.includes("[ASK MODE ACTIVE]"),
);
}
export default function askModeExtension(pi: ExtensionAPI): void {
let askModeEnabled = false;
let normalTools: string[] = [];
function persistState(): void {
pi.appendEntry<AskModeState>(STATE_TYPE, {
enabled: askModeEnabled,
normalTools,
});
}
function updateStatus(ctx: ExtensionContext): void {
if (!askModeEnabled) {
ctx.ui.setStatus("ask-mode", undefined);
ctx.ui.setWidget("ask-mode", undefined);
return;
}
ctx.ui.setStatus("ask-mode", ctx.ui.theme.fg("warning", "⏸ ask"));
ctx.ui.setWidget("ask-mode", [
ctx.ui.theme.fg("warning", "Ask mode"),
"Exploration only",
"Files are read-only",
"Bash is restricted to safe read-only commands",
]);
}
function enterAskMode(ctx: ExtensionContext): void {
if (askModeEnabled) {
updateStatus(ctx);
return;
}
normalTools = pi.getActiveTools();
askModeEnabled = true;
pi.setActiveTools(ASK_MODE_TOOLS);
ctx.ui.notify(`Ask mode enabled. Tools: ${ASK_MODE_TOOLS.join(", ")}`, "info");
updateStatus(ctx);
persistState();
}
function exitAskMode(ctx: ExtensionContext): void {
if (!askModeEnabled) {
ctx.ui.notify("Ask mode is not active.", "info");
updateStatus(ctx);
return;
}
askModeEnabled = false;
pi.setActiveTools(normalTools.length > 0 ? normalTools : ["read", "bash", "edit", "write"]);
ctx.ui.notify("Ask mode disabled. Previous tools restored.", "info");
updateStatus(ctx);
persistState();
}
pi.registerCommand("ask", {
description: "Enter ask mode for exploration-only work. Optional prompt sends a question immediately.",
handler: async (args, ctx) => {
const prompt = args.trim();
enterAskMode(ctx);
if (prompt) {
pi.sendUserMessage(prompt);
if (!ctx.hasUI) {
await ctx.waitForIdle();
}
}
},
});
pi.registerCommand("ask-exit", {
description: "Leave ask mode and restore the previous tool set",
handler: async (_args, ctx) => exitAskMode(ctx),
});
pi.registerCommand("ask-status", {
description: "Show whether ask mode is active",
handler: async (_args, ctx) => {
const message = askModeEnabled
? `Ask mode active. Tools: ${ASK_MODE_TOOLS.join(", ")}`
: "Ask mode is not active.";
if (!ctx.hasUI) {
process.stdout.write(`${message}\n`);
return;
}
ctx.ui.notify(message, "info");
},
});
pi.on("tool_call", async (event) => {
if (!askModeEnabled) return;
if (!ASK_MODE_TOOLS.includes(event.toolName)) {
return {
block: true,
reason: `Ask mode: tool "${event.toolName}" is disabled. Use /ask-exit before modifying files or using other tools.`,
};
}
if (event.toolName === "bash") {
const command = String(event.input.command ?? "");
if (!isSafeAskModeCommand(command)) {
return {
block: true,
reason: `Ask mode: bash command blocked (not recognized as safe read-only exploration).\nCommand: ${command}`,
};
}
}
});
pi.on("context", async (event) => {
if (askModeEnabled) return;
return {
messages: event.messages.filter((message) => !hasAskModeMarker(message as AgentMessage)),
};
});
pi.on("before_agent_start", async () => {
if (!askModeEnabled) return;
return {
message: {
customType: CONTEXT_TYPE,
content: `[ASK MODE ACTIVE]
You are in ask mode: exploration only.
Rules:
- Do not modify files.
- Do not use edit or write tools.
- Use read, grep, find, ls, and only safe read-only bash commands.
- Inspect, explain, compare, summarize, and answer questions.
- If a requested action would require a file change, say so explicitly instead of doing it.
Focus on observation and analysis, not implementation.`,
display: false,
},
};
});
pi.on("session_start", async (_event, ctx) => {
const entries = ctx.sessionManager.getEntries();
const latestState = entries
.filter((entry: { type: string; customType?: string }) => entry.type === "custom" && entry.customType === STATE_TYPE)
.pop() as { data?: AskModeState } | undefined;
if (latestState?.data) {
askModeEnabled = latestState.data.enabled ?? askModeEnabled;
normalTools = latestState.data.normalTools ?? normalTools;
}
if (askModeEnabled) {
pi.setActiveTools(ASK_MODE_TOOLS);
}
updateStatus(ctx);
});
}
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