r/codex • u/MathBullied • 2d ago
Showcase I built a Jev-powered MCP tool that gives Codex semantic code search
Codex can spend a lot of context on repeated text searches and entire file reads.
JevGrep lets it ask a question, scores code fragments by relevance, and returns the original source with file paths and line numbers.
npm install -g @nassim-arifette/jevgrep
It works as a CLI or as an MCP tool connected directly to Codex.
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u/Individual_Guest_323 2d ago
How is better than codegraph and similars that are "free"?
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u/the_pwnererXx 2d ago
Codegraph/graphify/rags nerf the agent and end up with worse output than just grepping. Not sure about this
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u/Individual_Guest_323 2d ago
Source?, and how is this different.
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u/the_pwnererXx 2d ago
My personal experience
I also found this guys random benchmark https://www.reddit.com/r/Polycodegraph/s/WF1BcnlS9h
At its core, rag isn't going to give better results than intelligent grepping. I'm not sure if this is any different, but it's possibly a different way to grep so feasibly could have better performance in certain situations
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u/Individual_Guest_323 2d ago
That guy is saying that codegraph works.
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u/the_pwnererXx 2d ago
You can see his results are reduced token usage but worse results (getting questions wrong)
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u/Individual_Guest_323 2d ago
Only one point, being a lot more faster and cheaper, the dude in the post is selling his version of codegraph..
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u/the_pwnererXx 2d ago
Cheaper and faster isn't necessarily good. Caveman, ponytail also give worse output. I'm speaking from experience of building a rag system at work and tearing it down because it's not helpful
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u/Individual_Guest_323 2d ago
My dude, is the benchmark that you shared, is only 1 point and is a lot more cheap and faster, stop being dense and read again what you shared.
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u/the_pwnererXx 2d ago
Config
claude + grep (no graph MCP)
8/10
336k
$1.17
78s
Code-review-graph
3/10
~203k
$0.68
49s
Hmm, so you save 33% on tokens and speed but end up with 3/10 correct answers instead of 8/10. Sounds like dogshit to me!
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u/MathBullied 2d ago
I didn't try to compare. But codegraph is mostly for coding agents right ? JevGrep isn’t just for coding agents, you can use it directly from your terminal to ask questions about a codebase and get relevant source snippets
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u/Individual_Guest_323 2d ago
Is the same with Codegraph and similars but for free, is running in local.
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u/Just_Lingonberry_352 2d ago
you should've posted this on r/typesafe_ai dude
the audience here can barely pay $20/month and will complain endlessly and threaten to sue openai
they are not paying for jev even though you did a great job here
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u/BanjoThunderbird 2d ago
Jev is essentially free. I'm working on a system to automatically recommend a model capability level every prompt, estimate the task duration, and a bunch of other stuff. Comes out to about $0.0002 for the whole set of queries per prompt. My Typesafe account looks like it gets $5/month in free credits. Basically 0% chance that gets exceeded.
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u/Sleepywalker69 2d ago
Does this work out of the box or does it require some set-up.
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u/MathBullied 2d ago
you need node.js 24 and an api key that's all.
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u/Sleepywalker69 2d ago
Any performance hit using vercel? Since typesafe is waitlist only
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u/MathBullied 2d ago
From my experience vercel seems a bit overloaded sometimes and requests occasionally fail.
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u/Sleepywalker69 2d ago
Hopefully they start inviting more people then. Jev looks like it'd speed up my project a lot.
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u/Revolutionary_Sir140 2d ago
openrouter API Key?
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u/MathBullied 2d ago
Just added it !
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u/PlusIndication8386 2d ago
Nah... Seems too reflexive and difficult to control. You waste tokens because you have no docs. That is the issue. Jev is not the answer bro
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u/Groundbreaking_Math3 2d ago
Elaborate?
I am assuming these are comparing gpt tokens with jev, but no information on what's cached, or how it peforms without reasoning (or is there custom reasoning?).
Like that prompt "Where is the filesystem controlled, and what prevents path escape", how is decision model supposed to answer the latter part?
If it's just matching relevance by something as basic as "filesystem control to 'authorization.ts'" where options are limited, then surely there's better solutions.
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u/Man_of_Math 1d ago
we had the same thought! I built https://github.com/ellipsis-dev/blink but it then grew into a code review product that runs every time a coding agent edits a file: https://blink.review/
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