Known bugs, and what actually fixes them
An independent record of real, traceable bugs in AI coding tools — Codex, Claude Code, Cursor, OpenCode and T3 Code. Every fix links to the issue behind it.
AI coding tools ship fast and break often. When yours does, you get an error string, a search box, and a lot of pages telling you to reinstall.
This site does something narrower and more useful: for each real error message, it records what the error actually means, which upstream issue is tracking it, what has been reported to work, and what people have already tried that doesn't.
Start with your error#
Why these pages are different#
Most troubleshooting content is written by guessing. These pages are written from the issue trackers.
Many of these bugs are open and unfixed. When that's the case, this site says so — with the issue number — instead of inventing a fix. Knowing "this is a known bug, stop reinstalling, subscribe to issue #17179" is more valuable than a plausible-sounding remedy that was never going to work.
Some concrete examples of what that looks like:
- The Codex Windows sandbox can rewrite your project's file ownership to an identity that no longer resolves. There are three
icaclscommands that reportedly fixed it permanently — here they are. exceeded retry limit, last status: 429is usually read as rate limiting. But 401 and 503 wear the same wrapper and have nothing in common with it — and there are documented cases of 429 firing with 99% of quota remaining. Read the status code, not the wrapper.- Reinstalling the Microsoft Store build of Codex doesn't fix most Windows failures, because the restrictive ACLs come back with it. Changing install method does.
By tool#
Codex — the deepest coverage here: install and download routes, the app-server protocol and SDKs, and the error clusters above.
Claude Code — coverage is expanding; connection errors, exit codes and hook failures are next.
T3 Code — full documentation for the open-source GUI: install, quickstart, git worktrees, remote access, phone and tablet.
Cursor and OpenCode — provider setup and integration notes.
Not affiliated with anyone#
This is an independent community reference. It is not affiliated with, endorsed by or sponsored by OpenAI, Anthropic, Cursor, Ping Labs or t3.gg, and all product names belong to their owners.
That independence is the point: a vendor's own docs will rarely tell you that a bug is open, that their Store build is the problem, or that the fix is to stop using their installer. Every page here records the date it was last checked and links to the upstream source, so you can verify anything yourself.
For canonical information — API guarantees, security posture, roadmaps — always go to the vendor.
FAQ#
What is this site?#
An independent, community-maintained record of known bugs and working fixes for AI coding tools, including Codex, Claude Code, Cursor, OpenCode and T3 Code. Each page is built from upstream issue trackers and release notes rather than guesswork.
Are these official docs?#
No. This site is not affiliated with OpenAI, Anthropic, Cursor, Ping Labs or t3.gg. It links to each vendor's official documentation and issue tracker, and it exists to cover the practical failures that official docs generally don't.
Why do some pages say the bug isn't fixed?#
Because it isn't. Where an issue is open upstream with no official fix, this site says so and links the issue, rather than inventing a remedy. It also lists the things people have already tried that don't help, so you don't repeat them.
How current is this?#
Every page shows when it was last checked against the upstream repository. These tools ship very frequently, so verify anything critical against the vendor's own sources before relying on it.
Which tool has the most coverage here?#
Codex, currently — including install and download routes, the app-server protocol, and the main error clusters. Claude Code coverage is expanding, and T3 Code has full product documentation.