---
title: "Daniel Farina"
description: "Agent harnesses, evals, and the layer around the model."
canonical: https://danielfarina.com/
last-updated: "2026-08-30"
---

# Daniel Farina

Source: https://danielfarina.com/

# Daniel Farina

I build the layer around the model — sandbox, tools, evals, control plane — and publish what actually breaks.

 - Grokathon 3rd + Most Users SpaceXAI · ThinkVoice · Aug 2026
- DC3 Researcher of the Month DoD VDP · March 2026
- 144 public repos GitHub · daniel-farina

## Harness shape

```
You ──talk──► Supervisor (read / steer / kill)
                    │
                    ├── Job A ──worktree──► edits
                    └── Job B ──shared────► explore
Talking never holds the write lock.

```

[Talk, don't block →](https://danielfarina.com/posts/talk-dont-block)

## Selected work

 [All work →](https://danielfarina.com/work)       [### Sub8 Computer-use agent on its own Linux VM. Isolation so the model can act without owning the host. Model-agnostic sandbox for coding agents. sandboxcomputer-use](https://danielfarina.com/work/sub8)     [### Xplor Chromium fork with an agent gateway. CDP + API so agents browse and build in-tab — not a chat overlay bolted onto Chrome. browserchromium](https://danielfarina.com/work/xplor) [source](https://github.com/daniel-farina/xplorer)    [### GrokTerm PTY host for coding agents with voice. Multi-tab terminal, two-way Grok Voice, notarized Mac app — drive agents without living on a keyboard. terminalvoice](https://danielfarina.com/work/grokterm) [source](https://github.com/daniel-farina/grokterm-releases)    [### grok-remote ACP control plane over a tailnet. Remote agent sessions with a real UI — supervisor/worker shaped, not a single chat pane. acpcontrol-plane](https://danielfarina.com/work/grok-remote) [source](https://github.com/daniel-farina/grok-remote)    [### grok-bench Prompt diffs, compaction, proxy observability. Measure where tool-call loops and long-context workflows actually break. evalsbench](https://danielfarina.com/work/grok-bench) [source](https://github.com/daniel-farina/grok-bench)    [### ThinkVoice Speak without moving your mouth — Grokathon. Grok Voice + sensing; blink/nod select. SpaceXAI Grokathon 2026: 3rd place and Most Users. hcivoice](https://danielfarina.com/work/thinkvoice)

## Writing

 [All writing →](https://danielfarina.com/writing)

### Essay Talk, don't block: splitting the coding-agent composer from the worker

The thing you talk to should not be the thing holding the write lock.

    Aug 23, 2026   architecture

### Essay Sub8: give the agent a computer it cannot escape

Computer-use is easy. Isolation is the product.

    Aug 16, 2026   tool

### Essay Fork the browser. Don't bolt on an extension.

If the agent is a guest in Chrome, you already lost.

    Jun 11, 2026   tool

### Essay Drive a coding agent from the other machine

ACP over a tailnet. Session survives disconnect.

    May 18, 2026   tool

### 3,500 lines of 3D game logic from a single Grok 3 session

Long-horizon tool use on XForce — where Grok 3 held and where it didn't.

    Mar 1, 2025   game

## Public proof

Demos and reach live on [@Daniel_Farinax](https://x.com/Daniel_Farinax). Architecture, evals, and failure modes live here. [Browse the build log →](https://danielfarina.com/writing)