co-mono/packages/coding-agent/examples/sdk

SDK Examples

Programmatic usage of pi-coding-agent via createAgentSession().

Examples

File	Description
01-minimal.ts	Simplest usage with all defaults
02-custom-model.ts	Select model and thinking level
03-custom-prompt.ts	Replace or modify system prompt
04-skills.ts	Discover, filter, or replace skills
05-tools.ts	Built-in tools, custom tools
06-extensions.ts	Logging, blocking, result modification
07-context-files.ts	AGENTS.md context files
08-slash-commands.ts	File-based slash commands
09-api-keys-and-oauth.ts	API key resolution, OAuth config
10-settings.ts	Override compaction, retry, terminal settings
11-sessions.ts	In-memory, persistent, continue, list sessions
12-full-control.ts	Replace everything, no discovery

Running

cd packages/coding-agent
npx tsx examples/sdk/01-minimal.ts

Quick Reference

import { getModel } from "@mariozechner/pi-ai";
import {
  AuthStorage,
  createAgentSession,
  discoverAuthStorage,
  discoverModels,
  discoverSkills,
  discoverExtensions,
  discoverCustomTools,
  discoverContextFiles,
  discoverSlashCommands,
  loadSettings,
  buildSystemPrompt,
  ModelRegistry,
  SessionManager,
  codingTools,
  readOnlyTools,
  readTool, bashTool, editTool, writeTool,
} from "@mariozechner/pi-coding-agent";

// Auth and models setup
const authStorage = discoverAuthStorage();
const modelRegistry = discoverModels(authStorage);

// Minimal
const { session } = await createAgentSession({ authStorage, modelRegistry });

// Custom model
const model = getModel("anthropic", "claude-opus-4-5");
const { session } = await createAgentSession({ model, thinkingLevel: "high", authStorage, modelRegistry });

// Modify prompt
const { session } = await createAgentSession({
  systemPrompt: (defaultPrompt) => defaultPrompt + "\n\nBe concise.",
  authStorage,
  modelRegistry,
});

// Read-only
const { session } = await createAgentSession({ tools: readOnlyTools, authStorage, modelRegistry });

// In-memory
const { session } = await createAgentSession({
  sessionManager: SessionManager.inMemory(),
  authStorage,
  modelRegistry,
});

// Full control
const customAuth = new AuthStorage("/my/app/auth.json");
customAuth.setRuntimeApiKey("anthropic", process.env.MY_KEY!);
const customRegistry = new ModelRegistry(customAuth);

const { session } = await createAgentSession({
  model,
  authStorage: customAuth,
  modelRegistry: customRegistry,
  systemPrompt: "You are helpful.",
  tools: [readTool, bashTool],
  customTools: [{ tool: myTool }],
  extensions: [{ factory: myExtension }],
  skills: [],
  contextFiles: [],
  slashCommands: [],
  sessionManager: SessionManager.inMemory(),
});

// Run prompts
session.subscribe((event) => {
  if (event.type === "message_update" && event.assistantMessageEvent.type === "text_delta") {
    process.stdout.write(event.assistantMessageEvent.delta);
  }
});
await session.prompt("Hello");

Options

Option	Default	Description
authStorage	discoverAuthStorage()	Credential storage
modelRegistry	discoverModels(authStorage)	Model registry
cwd	process.cwd()	Working directory
agentDir	~/.pi/agent	Config directory
model	From settings/first available	Model to use
thinkingLevel	From settings/"off"	off, low, medium, high
systemPrompt	Discovered	String or (default) => modified
tools	codingTools	Built-in tools
customTools	Discovered	Replaces discovery
additionalCustomToolPaths	[]	Merge with discovery
extensions	Discovered	Replaces discovery
additionalExtensionPaths	[]	Merge with discovery
skills	Discovered	Skills for prompt
contextFiles	Discovered	AGENTS.md files
slashCommands	Discovered	File commands
sessionManager	SessionManager.create(cwd)	Persistence
settingsManager	From agentDir	Settings overrides

Events

session.subscribe((event) => {
  switch (event.type) {
    case "message_update":
      if (event.assistantMessageEvent.type === "text_delta") {
        process.stdout.write(event.assistantMessageEvent.delta);
      }
      break;
    case "tool_execution_start":
      console.log(`Tool: ${event.toolName}`);
      break;
    case "tool_execution_end":
      console.log(`Result: ${event.result}`);
      break;
    case "agent_end":
      console.log("Done");
      break;
  }
});