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Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

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Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#123

Post by GodelNumbering »

gchamonlive wrote: post #102
messh wrote: post #64

Earlier quoted context omitted.

Anchor based editing requires injecting new anchors to the context, and dirac does so via a diff. So how is this more efficient (token-wise) than search and replace?? Even at a single token per hash. Also, code is read more than written so these just add up. I experimented once with stable anchors, albeit longer than a single token, and found it a downgrade. My conclusion is that the efficiency dirac sees comes mainl…

> My conclusion is that the efficiency dirac sees comes mainly from showing file skeleton by default how hard do you think it would be to bring this optimization to oh-my-pi and opencode? I am testing dirac and it's very cool but the tooling isn't there yet comparing to oh-my-pi in terms of UX.

Would love some more feedback on this. Where do you think are major gaps?

Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#124

Post by GodelNumbering »

drakythe wrote: post #81
GodelNumbering wrote: post #4

Interesting things Dirac does: 1. Uses an optimized version of Hash-Anchored edits for file editing ( https://dirac.run/posts/hash-anchors-myers-diff-single-token ) 2. Utilizes language's AST to decide what to fetch into context, entirely avoids large code file reads 3. Batches all operations. Does large number of reads/edits simultaneously (you can see a video demo for deepseek-v4-flash here https://www.reddit.com/r…

How are the two token anchors chosen when the initial 1700 single token anchors run out? I'm assuming just a 2 word combination from the 1700.

That's correct

Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#125

Post by GodelNumbering »

_ink_ wrote: post #121

Is it still advisable to use something like codebase-memory-mcp for large codebases, or is Dirac doing fine without that?

Dirac doesn't use any of that but the memory part may be something I explore in future

Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#126

Post by GodelNumbering »

redrove wrote: post #52
GodelNumbering wrote: post #27

Earlier quoted context omitted.

Assuming you logged in with OAuth, I am guessing you are trying to use gpt-5.5? In my tests, it worked using gpt-5.4 for me and I assumed gpt-5.5 is not available to me because I am on the free plan Do you have the subscription that allows 5.5? If so, I can look into what changed in API. Sorry I rarely use openAI so it is a bit of an untrodden path

Yes I'm on ChatGPT Pro (OAuth) and I'm trying to use gpt-5.5-xhigh. That was the issue, 5.4 works just fine. Support for service: priority (GPT /fast mode) would also be cool!

Will fix this soon. Please feel free to create a github issue in the meantime.

Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#127

Post by GodelNumbering »

gchamonlive wrote: post #98

hey there! thanks for the project! I was intrigued with the claims so I wanted to test it myself. First I (vibe)made an AUR package I could use to install it from git source, from master: https://aur.archlinux.org/packages/dirac-cli-git Then I went in to see what's what, but I there isn't support for gemini-cli login, and importing from opencode doesn't work, failing with a message "Something went wrong. Could not re…

Hey thanks for doing this! I will be looking into the gpt versions.

It doesn't support gemini CLI because google seems to ban users for using it, there was a big controversy about it some time ago so I decided to leave it alone for now. Also, feel free to reach out to me if you want to discuss anything specific

Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#129

Post by jimmcslim »

GodelNumbering wrote: post #4

Interesting things Dirac does: 1. Uses an optimized version of Hash-Anchored edits for file editing ( https://dirac.run/posts/hash-anchors-myers-diff-single-token ) 2. Utilizes language's AST to decide what to fetch into context, entirely avoids large code file reads 3. Batches all operations. Does large number of reads/edits simultaneously (you can see a video demo for deepseek-v4-flash here https://www.reddit.com/r…

For the hash-anchored edits, sharing here Can Bölük's original post about the idea https://blog.can.ac/2026/02/12/the-harness-problem/

Re: Show HN: OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview

#130

Post by gchamonlive »

GodelNumbering wrote: post #123
gchamonlive wrote: post #102

Earlier quoted context omitted.

> My conclusion is that the efficiency dirac sees comes mainly from showing file skeleton by default how hard do you think it would be to bring this optimization to oh-my-pi and opencode? I am testing dirac and it's very cool but the tooling isn't there yet comparing to oh-my-pi in terms of UX.

Would love some more feedback on this. Where do you think are major gaps?

Thinking back, I might have jumped the gun here. I can't objectively evaluate UX without spending more time with the tool. I'll try to daily drive it a bit before I can form an opinion.
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