Aider Alternative: Embeddable State-Machine Agent Harness + MCP + Canvas (2026)

1import { createAgent, AgentEvent } from 'smoke-monkey-harness';
2
3const agent = createAgent({
4  provider: 'openai',
5  model: 'gpt-5-codex',
6  workspacePath: process.cwd(),
7  permissions: { run_command: 'ask', write_file: 'allow' },
8});
9
10// Typed event stream — render it in any UI
11for await (const event of agent.stream('Refactor utils and commit')) {
12  if (event.type === 'tool_call') console.log('Running:', event.name);
13  if (event.type === 'permission') await event.approve(); // human-in-the-loop
14}

1# Aider is a terminal pair programmer, not a library
2pip install aider-chat
3aider --model gpt-4o src/utils.ts
4
5# You type instructions in the terminal.
6# Aider edits files and makes git commits.
7# There is no import, no event stream, no MCP server,
8# no embeddable UI, and no multi-agent canvas.