vinhnx's comments

On: Sites in ChatGPT

[vinhnx]

I built a ChatGPT Site [0] for VT Code [1]: a browser-based WebMCP editor for exploring code, reviewing changes, and working with the agent.

[0] https://vtcode.vinhnx.chatgpt.site

[1] https://github.com/vinhnx/VTCode

On: Pi 1.0

[vinhnx]

I built VT Code in Rust with a similar goal: lightweight, terminal-first, and shipped as a single binary.

https://github.com/vinhnx/vtcode

On: Pi 1.0

[vinhnx]

I built VT Code in Rust for similar reasons. Single binary, low runtime overhead, with extensibility mostly handled through MCP.

https://github.com/vinhnx/vtcode

On: Sonnet 5.5

[vinhnx]

Been trying Claude Sonnet 5.5 through Merge Gateway. So far it feels fast and efficient, and noticeably different from Sonnet 5.

The communication and writing style also feels closer to Opus 5.5.

On: Ask HN: What are you working on? (September 2026)

[vinhnx]

I've been building VT Code for about a year as a way to understand how coding-agent harnesses work in practice. This month I'm continuing building it https://github.com/vinhnx/VTCode.

On: So you want to use OpenRouter?

[vinhnx]

I've been using Merge AI Gateway and it's been useful so far. They tend to add new models quickly, and support has been responsive. https://gateway.merge.dev/

[matt_merge → vinhnx]

Glad you’ve been enjoying Gateway! We also have some huge discounts on open models like GLM 5.3 Flash.

[vinhnx → matt_merge]

Hi Matt, awesome you're here. I've been using GLM-5.3 Flash since it came out and really enjoy using with via Merge AI Gateway.

On: GPT-6 Astra

[vinhnx]

GPT-6 Astra scores 74.1% at DeepSWE v1.1 bench. Huge!

On: ChatGPT outage – Resolved

[vinhnx]

https://chatgpt.com/ is up again

On: ChatGPT outage – Resolved

[vinhnx]

It seems OpenAI is going to release Astra soon, https://x.com/ChatGPT/status/2095527989077557738.

On: Show HN: VT Code – My attempt at building a coding-agent harness

[vinhnx]

I've been building VT Code for about a year as a way to understand how coding-agent harnesses work in practice.

Most of the code has been built with the help of coding agents, including VT Code itself. My focus has been on designing and iterating on the harness: tool execution, context management, sandboxing, permissions, verification, long-running sessions, subagents, and provider support.

It's written in Rust and runs primarily in the terminal.

https://github.com/vinhnx/VTCode

I'd be interested in feedback from others building coding agents, especially around long-running reliability and harness design.