Netision · 2026 / case 06

A coworker on your own machine

A local agent designed to work on your real files through the web app you already use, and to never do anything destructive without a yes.

Prototype: the local agent and the cloud bridge (9 of 9 commits); the product UI was never wired

Python · WebSocket · asyncio

destructive actions without approval: 0; by design: reads run, writes waitdoc

A desktop agent that dials out to a cloud bridge over a WebSocket. The idea: people keep using the familiar web interface while the agent lists, finds, reads and summarises files on their machine, and turns anything that writes into a plan they approve. The agent and the bridge exist; the product never wired up a screen for them.

employer work: written up as architecture and decisions; client names, internal hosts and source stay private.

fig.how it fits together

┌──────────┐      ┌──────────┐      ┌───────────┐│ cloud UI │─────▶│  bridge  │─────▶│   agent   ││          │◀─────│          │◀─────│           │└──────────┘      └──────────┘      └─────┬─────┘                                          ▼                                          ┌───────────┐                                    │  confirm  │                                    └─────┬─────┘                                          ▼                                          ┌───────────┐                                    │   files   │                                    └───────────┘

01/04The design: you ask in the web app you already use, and the request crosses a WebSocket bridge to an agent that the machine dialled out to. Nothing listens on the laptop.

§ 1The idea

'Tidy up my Downloads folder', 'find last month's electricity bill', 'summarise this document'. The agent always asks before anything destructive: reads execute immediately; write, move and delete show a preview plan and wait for an explicit approval.