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repl: Retry iopub connection on failure (#62358)
## Context

This is a rebase of #52302, which was approved by @Veykril in May but
still needed a rebase before it could be merged — it seems the original
author @MostlyKIGuess forgot about it. I rely on this fix daily for REPL
over SSH on an unstable connection and need it rather urgently, so I
cherry-picked the original commit (with authorship preserved) and
resubmitted it as a new PR.

Closes #51834
Supersedes #52302

## How to Review

The code itself was already reviewed and approved in #52302. This PR
only rebases it onto latest `main`, with one simple conflict resolution
against #53014: when all retries are exhausted, the error now uses the
improved message from that PR (suggesting `pip install ipykernel` on the
remote host) instead of the plain one. Comparing this diff against the
original PR's diff should make the review straightforward.

## Self-Review Checklist

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content adheres to Zed's UI standards
([UX/UI](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
and
[icon](https://github.com/zed-industries/zed/blob/main/crates/icons/README.md)
guidelines)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- repl: Fixed iopub connection failures over SSH on slow or unstable
connections by retrying with exponential backoff.

Co-authored-by: mostlykiguess <bruvistrue93@gmail.com>
2026-08-08 14:59:07 +00:00
.agents/skills Add dylint lint library for Zed-specific patterns (#58496) 2026-07-03 22:05:34 +00:00
.cargo
.cloudflare Improve docs AI readiness (#59577) 2026-07-08 20:54:51 +00:00
.config
.factory
.github Speed up cargo build -p zed compilation (#62059) 2026-08-01 19:42:37 +00:00
.wezel Add wezel scenario for an incremental editor build (#62016) 2026-08-02 18:40:37 +00:00
.zed
assets editor: Add configurable git gutter width setting (#61304) 2026-08-03 01:46:00 +00:00
ci
crates repl: Retry iopub connection on failure (#62358) 2026-08-08 14:59:07 +00:00
docs Document Poolside external agent setup (#62225) 2026-08-05 17:34:07 +00:00
extensions ci: Set and enforce more default permissions (#60222) 2026-07-06 16:02:54 +00:00
legal Document provider safety retention for designated Zed-hosted models (#58967) 2026-06-09 21:54:48 +00:00
nix agent: Re-enable sandbox (#61711) 2026-07-29 13:03:22 +00:00
script Add new area labels to community PR track mapping (#62314) 2026-08-07 11:11:10 +00:00
tooling Speed up cargo build -p zed compilation (#62059) 2026-08-01 19:42:37 +00:00
.git-blame-ignore-revs
.gitattributes
.gitignore csv_preview: Add single-line row displaying mode (#61127) 2026-07-16 19:28:22 +00:00
.mailmap
.prettierrc
.rules Fix typo in .rules (#61693) 2026-07-27 05:59:53 +00:00
AGENTS.md
Cargo.lock deps: Bump pathfinder_simd & fix upcoming rustc warnings (#62170) 2026-08-07 10:16:57 +00:00
Cargo.toml deps: Bump pathfinder_simd & fix upcoming rustc warnings (#62170) 2026-08-07 10:16:57 +00:00
CLAUDE.md
clippy.toml
CODE_OF_CONDUCT.md
compose.yml
CONTRIBUTING.md CONTRIBUTING.md: Document the cap on simultaneous PRs (#61516) 2026-07-23 14:34:29 +00:00
debug.plist
default.nix
Dockerfile-collab
Dockerfile-collab.dockerignore
Dockerfile-cross.dockerignore
Dockerfile-distros
Dockerfile-distros.dockerignore
flake.lock
flake.nix ci: Remove garnix substitutor (#58033) 2026-05-29 05:56:42 +00:00
GEMINI.md
LICENSE-APACHE
LICENSE-GPL
livekit.yaml
lychee.toml
Procfile
Procfile.web
README.md docs: Remove readme junk (#60008) 2026-06-27 15:06:29 +00:00
renovate.json
REVIEWERS.conl
rust-toolchain.toml
rustfmt.toml
shell.nix
typos.toml agent: Show MCP tool primary argument in tool-call header (#54604) 2026-07-13 14:00:40 +00:00

Zed

Zed CI

Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.


Installation

On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).

Other platforms are not yet available:

Developing Zed

Contributing

See CONTRIBUTING.md for ways you can contribute to Zed.

Also... we're hiring! Check out our jobs page for open roles.

Licensing

Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.

License information for third party dependencies must be correctly provided for CI to pass.

We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:

  • Is it showing a no license specified error for a crate you've created? If so, add publish = false under [package] in your crate's Cargo.toml.
  • Is the error failed to satisfy license requirements for a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to the accepted array in script/licenses/zed-licenses.toml.
  • Is cargo-about unable to find the license for a dependency? If so, add a clarification field at the end of script/licenses/zed-licenses.toml, as specified in the cargo-about book.

Sponsorship

Zed is developed by Zed Industries, Inc., a for-profit company.

If youd like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.