This month I'm currently continuing to work on my opensource coding agent VT Code (https://github.com/vinhnx/VTCode). For the last few months I've been improving the harness and UI/UX. Focusing developer experience and TUI performance.

Just used Opus 4.6 via GitHub Copilot. It feels very different. Inference seems slow for now. I guess Opus 4.6 has adaptive thinking activated by default.

Confirm by PM lead at VS Code team

> "We have high thinking as default + adaptive thinking, first time we’ve run with these settings..."

> https://x.com/pierceboggan/status/2019645801769689486

It dos seem noticeably slower. I may stick with 4.5 which was good enough for me for most tasks.

VS Code confirms that they are experimenting with the new adaptive thinking and high reasoning effort params. https://x.com/pierceboggan/status/2019645801769689486

Best part of the Codex app launch is that, OpenAI has opened the whole Codex ecosystem (CLI, Web, IDE Extensions) for free ChatGPT users. And x2 usage for Plus, Pro. This is I think to gain developers' attraction from Claude Code.

Boris Cherny (Claude Code creator) replies to Andrej Karpathy

https://xcancel.com/bcherny/status/2015979257038831967

One thing caught my eyes is that besides K2.5 model, Moonshot AI also launched Kimi Code (https://www.kimi.com/code), evolved from Kimi CLI. It is a terminal coding agent, I've been used it last month with Kimi subscription, it is capable agent with stable harness.

GitHub: https://github.com/MoonshotAI/kimi-cli

>Kimi Code CLI is not only a coding agent, but also a shell.

That's cool. It also has a zsh hook, allowing you to switch to agent mode wherever you're.

It is, Kimi Code CLI supports Zed' Agent Client Protocol (http://agentclientprotocol.com/), so it can acts as an external agent that could run in any ACP-compatible client, eg: Zed, Jetbrain, Toad CLI, Minano Notebook. Also, it supports Agent Skills. Moonshot AI developers are actively update the agent and every active. I really like their CLI.

Does it support the swarm feature? Does Opencode?

How does it fare against CC?

Anecdotally, I've cancelled my Claude Code subscription after using Kimi K2.5 and Kimi CLI for the last few days. It's handled everything I've thrown at it. It is slower at the moment, but I expect that will improve.

This came as a big surprise to me last year. I remember they announced that Codex CLI is opensource, and the codex-rs [0] from TypeScript to Rust, with the entire CLI now open source. This is a big deal and very useful for anyone wanting to learn how coding agents work, especially coming from a major lab like OpenAI. I've also contributed some improvements to their CLI a while ago and have been following their releases and PRs to broaden my knowledge.

[0] https://github.com/openai/codex/tree/main/codex-rs

I know very little about typescript and even less about rust. Am I getting the rust version of codex when I do `npm i -g @openai/codex`?

A stand alone rust binary would be nicer than installing node.

yes [0]

> The Rust implementation is now the maintained Codex CLI and serves as the default experience

[0] https://github.com/openai/codex/tree/main/codex-rs#whats-new...

They should switch to a native installer then. Quite confusing

    brew install codex

https://developers.openai.com/codex/quickstart/?setup=cli

Yeah I'm out here installing a billion node things to have codex hack on my python app. Def gonna look into a standalone rust binary.

They're leveraging the (relative) ubiquity of npm amongst developers.

This January, I'm still working on my coding agent VT Code. Hardening execution harness, improving tool discovery mechanisms, refining context engineering and performance optimization.

https://github.com/vinhnx/vtcode

https://vinhnx.github.io/ This is my personal site

Hello, World!

I'm @vinhnx on the internet.

I love your website. Very clear and to the point.

Random thought: What if "AI-assisted programming" becomes "human-assisted programming" instead? We human programmers no longer play the main role in producing code, and we become the "Copilot"?

> The unfortunate truth is that the engineering in opencode is so far ahead of Claude Code

I'm curious, what made you think of that?