/**
* Custom System Prompt
*
* Shows how to replace or modify the default system prompt.
*/
import {
createAgentSession,
DefaultResourceLoader,
getAgentDir,
SessionManager,
} from "@earendil-works/pi-coding-agent";
const cwd = process.cwd();
const agentDir = getAgentDir();
// Option 1: Replace prompt entirely
const loader1 = new DefaultResourceLoader({
cwd,
agentDir,
systemPromptOverride: () => `You are a helpful assistant that speaks like a pirate.
Always end responses with "Arrr!"`,
// Needed to avoid DefaultResourceLoader appending APPEND_SYSTEM.md from ~/.pi/agent or <cwd>/.pi.
appendSystemPromptOverride: () => [],
});
await loader1.reload();
const { session: session1 } = await createAgentSession({
resourceLoader: loader1,
sessionManager: SessionManager.inMemory(),
});
session1.subscribe((event) => {
if (event.type === "message_update" && event.assistantMessageEvent.type === "text_delta") {
process.stdout.write(event.assistantMessageEvent.delta);
}
});
console.log("=== Replace prompt ===");
await session1.prompt("What is 2 + 2?");
console.log("\n");
// Option 2: Append instructions to the default prompt
const loader2 = new DefaultResourceLoader({
cwd,
agentDir,
appendSystemPromptOverride: (base) => [
...base,
"## Additional Instructions\n- Always be concise\n- Use bullet points when listing things",
],
});
await loader2.reload();
const { session: session2 } = await createAgentSession({
resourceLoader: loader2,
sessionManager: SessionManager.inMemory(),
});
session2.subscribe((event) => {
if (event.type === "message_update" && event.assistantMessageEvent.type === "text_delta") {
process.stdout.write(event.assistantMessageEvent.delta);
}
});
console.log("=== Modify prompt ===");
await session2.prompt("List 3 benefits of TypeScript.");
console.log();