Alex Bit

npx codemod ai coding agents struggle with large migrations. slow, unreliable, costly. they need a lot of babysitting. if you’re a platform/principal eng you’ve felt this pain 😅 so we gave them a new superpower npx codemod ai 🎉 everything your AI coding agent needs for fast, reliable code migrations free, open source, local-first, no login and it gets better over time as models improve + community contributes to the registry try it. break it. tell us what sucks link + debarrel case study in replies 👇🏼

@samsantosb @codemod , open source tooling for deterministic code mining and modification. OpenJS Foundation partner and adopted by React, Node.js, Nuxt, pnpm, webpack, react router, express, and many more. 2M+ codemod runs to date. npx codemod ai go.codemod.com/cli-docs

Quais recursos você faz pra reduzir o não-determinismo da AI no trabalho ? Você ainda faz code review ?

@sama Two months free won't move teams off Claude Code. Lock-in isn't price. It's repo conventions, custom commands, internal evals, CI integration. Migration tooling beats trial length. Ship the codemod, not the discount.

@jonashernlund @sama 💯 specially that building codemods has never been easier. npx codemod ai go.codemod.com/cli-docs

codex is the best AI coding product and we want to make it easy to try. for the next 30 days, we are giving companies that want to try switching over two months of free codex usage.

awesome. have you heard about our codemod runtime jssg (JS ast-grep)? if you ever take it for a spin, would love to hear your feedback on it #how-jssg-differs" target="_blank" rel="nofollow noopener">docs.codemod.com/jssg/intro#how… you can just run npx codemod ai and your coding agents will get all the knowledge and tools it needs to build jssg codemods! just describe what you want from your agent...

@alex__bit TSSLint, custom TypeScript scripts that leverage the TypeScript compiler AST, forked dprint plugins (just formatting stuff)

I must say that understanding RegExp and codemod tooling has been extremely helpful in a world of AI slop and accidental edits

🤖 Asking AI to refactor 200 files burns tokens, takes minutes, and sometimes hallucinates. A codemod does it reliably — for free. Nicolas Carlo shows how to use AI to write the codemods your team actually needs, live. Catch it at React Summit US!

That’s what we are working on at @codemod. Framework builders can easily ship codemods with their new releases. it’s never been easier to do that. They just need to run one command and then their agent knows what to do next… npx codemod ai go.codemod.com/cli-docs Adopted by React, Node.js, Nuxt, pnpm, webpack, react router, express, and many more.

There is only one reason we have backwards compatibility in software: humans. Having to adjust our workflows is difficult and inconvenient. But I can imagine a point where this will no longer matter if AI agents can simply update your software for you, like a universal codemod. Then we can always be on the best standards. Python would be at version 9 by now.

@alex1craig @shadcn app.codemod.com/registry

@alex1craig @shadcn go.codemod.com/cli-docs

How can I make shadcn/ui better for you? What do you need?

Happy to help. Btw, did you know that jssg (js ast-grep) has been adopted by top frameworks such as React, Node.js, Nuxt, pnpm, webpack, react router, express, ESlint, Backstage and many more? More than 2M codemod runs to date so far. 🤯 It’s 10x more performant than jscodeshift. It has a vibrant community and actively maintained. Every day more jssg codemods are created and published to Codemod Registry. Feel free to ping me if u ever have any codemod questions! ;)

Thanks for sharing this, Alex! JSSG (JavaScript AST-Grep) looks like a solid evolution—secure sandboxed execution, Tree-sitter parsing, ast-grep pattern matching, and multi-language support make it stand out for reliable, high-performance transforms. Perfect fit for the Codemod platform's hybrid deterministic + AI approach you mentioned earlier. This strengthens why it's one of the top toolkits for enterprise-scale work.

Is it just me or would we not be better off building a codemod to do these things? Afaict, all of the example skills could be codemods that use static analysis and generate the relevant code which would be way more efficient, performant, and deterministic than relying on an LLM.

@grok @ncq_syh @felangelov Did you know about this? docs.codemod.com/jssg/intro

**Top codemod toolkits & what makes them stand out:** - **jscodeshift** (JS/TS, by Meta): AST-based (via recast), jQuery-like API for precise transforms, parallel runner, dry-run + style preservation. Gold standard for React/JS large-scale refactors. - **ts-morph** (TypeScript): Wrapper on TS Compiler API – type-aware analysis, safe renames/symbol ops, great for complex TS-specific changes. - **OpenRewrite** (Java): Lossless Semantic Trees (LST) for semantic, recipe-based migrations. Highly deterministic and enterprise-proven. - **LibCST** (Python): Concrete Syntax Tree – precise, formatting-preserving transforms (successor to Bowler). - **Codemod platform** (codemod.com): Hybrid deterministic + AI (Codemod2.0), workflows, agent orchestration for massive enterprise migrations. For Dart/Flutter, most are custom via analyzer or dart fix – fewer mature off-the-shelf options vs JS/Java.

@grok @ncq_syh @felangelov What are the top codemod toolkits out there and what are their mean features that make them special?

A codemod is a script/tool that automates large-scale, repeatable code transformations across a codebase. It typically parses code into an AST (abstract syntax tree), applies precise find-and-replace rules based on static analysis, then rewrites files—making changes deterministic, fast, and safe (with version control diffs). Common in Flutter/Dart, React, etc., for refactors that LLMs might suggest but can't guarantee perfectly.

@erikdunteman @diptanu @threepointone What’s the narrative you want to push? Anything codemod related, would be happy to help. codemod.com

@diptanu @threepointone is consistently top of my list for people who think and write with high clarity on these topics, worth the cc!

lazyweb - I remember seeing a shit ton of blogs and posts making the claim "we replaced all our tools with just a bash tool and tokens reduced x% and accuracy increased y%" Anyone have these bookmarked? I've got some narratives to push

@OrestesGaolin @felangelov @rodydavis Here is a sample multi-step workflow: docs.codemod.com/workflows/refe…

@OrestesGaolin @felangelov @rodydavis go.codemod.com/cli-docs

@mohsen____ @AstraKernel This is coooool. Loved the name too ;)

@AstraKernel Rust is the answer github.com/mohsen1/tsz

The official pnpm rewrite in Rust >pacquet is a port of the pnpm CLI from TypeScript to Rust > pacquet is under active development and not yet ready for production use. github.com/pnpm/pacquet

@ericjuta Cool. Did it eventually create a good codemod to get the job done? Which codemod toolkit did it use?

bruh this is with gpt 5.5 no thinking "The trigger reinsertion still only matched a subset because some option objects contain nested braces. I’m going to use an AST-aware codemod with TypeScript’s parser for this part instead of regex so nested concurrency/cancel objects don’t get skipped."

@stanzillaz Thanks for flagging. Can you please open up a GitHub issue here: github.com/pnpm/codemod

@alex__bit Hrrm, that sets the version to the latest RC and changed all my single quotes to double quotes in the workspace.yaml

pnx codemod run pnpm-v10-to-v11