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Ian Chamberlain 49dee40073
agent: Skip empty assistant messages for Mistral provider (#47579)
This small change *may* help with #39211, #35025 or #39031 although I'm
not positive it will fix it entirely. At a minimum, it should prevent
sending invalid requests to the Mistral API, which return a 400 error
and can prevent the thread from progressing if it gets stuck in a retry
loop.

This should prevent sending a message like `{ "role": "assistant",
"content": "" }` if for some reason the thread contains a message with
an empty text content and no tool calls.

Some users (including myself) have encountered this with the Devstral 2
models, although it doesn't seem trivial to reproduce:
https://github.com/zed-industries/zed/issues/37021#issuecomment-3728902562

When it occurs, error logs look something like this:
```
2026-01-24T19:53:35-08:00 ERROR [crates/agent/src/thread.rs:984] invalid type: string "Failed to connect to Mistral API: 400 Bad Request {\"object\":\"error\",\"message\":\"Assistant message must have either content or tool_calls, but not none.\",\"type\":\"invalid_request_assistant_message\",\"param\":null,\"code\":\"3240\"}", expected struct EditFileToolOutput
2026-01-24T19:53:35-08:00 ERROR [crates/agent/src/thread.rs:984] invalid type: string "Failed to connect to Mistral API: 400 Bad Request {\"object\":\"error\",\"message\":\"Assistant message must have either content or tool_calls, but not none.\",\"type\":\"invalid_request_assistant_message\",\"param\":null,\"code\":\"3240\"}", expected struct EditFileToolOutput
2026-01-24T19:53:35-08:00 ERROR [crates/agent/src/thread.rs:984] invalid type: string "Failed to connect to Mistral API: 400 Bad Request {\"object\":\"error\",\"message\":\"Assistant message must have either content or tool_calls, but not none.\",\"type\":\"invalid_request_assistant_message\",\"param\":null,\"code\":\"3240\"}", expected struct EditFileToolOutput
```

Release Notes:

- Fixed agent sometimes sending invalid messages to Mistral API
2026-02-13 11:49:56 +00:00
.cargo ci: Update typos versions and fix new occurrences (#40784) 2025-10-21 10:43:22 +00:00
.cloudflare docs: Document context servers (#21170) 2024-11-25 11:05:14 -05:00
.config git: Side-by-side diff UI (#47349) 2026-01-22 02:31:14 -05:00
.factory/prompts Add prompts and scripts for automatic crash repro and fix (#49063) 2026-02-12 12:42:41 -08:00
.github Update pull_request_template.md (#48805) 2026-02-13 09:23:51 +00:00
.zed gpui: Rewrite Windows PlatformTextSystem for better performance (#48087) 2026-02-01 13:32:22 +01:00
assets Remove Agents Panel and utility panes (#49038) 2026-02-12 15:46:10 -05:00
ci Move Nightly release to gh-workflow (#41349) 2025-10-28 13:57:23 -06:00
crates agent: Skip empty assistant messages for Mistral provider (#47579) 2026-02-13 11:49:56 +00:00
docs docs: Add note about escaping $ in snippets (#48710) 2026-02-13 08:54:44 +00:00
extensions extension_ci: Merge extension workflow files into one file (#48810) 2026-02-09 21:18:53 +01:00
legal Fix the markdown table (#38729) 2025-09-23 16:49:45 +00:00
nix nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
script Add prompts and scripts for automatic crash repro and fix (#49063) 2026-02-12 12:42:41 -08:00
tooling Install sccache *after* we rm-rf target... (#49035) 2026-02-12 15:53:04 +00:00
.git-blame-ignore-revs Add PR 15352 to .git-blame-ignore-revs (#30870) 2025-05-17 11:35:58 +00:00
.gitattributes windows: Make sure zed.sh using the correct line ending (#37650) 2025-09-05 16:25:55 +00:00
.gitignore docs: Improve Git documentation accuracy and structure (#47419) 2026-01-23 08:43:24 -08:00
.mailmap Update .mailmap (#47413) 2026-01-22 23:57:26 +05:30
.prettierrc ci: Add check for formatting default.json (#30034) 2025-05-06 18:55:26 +00:00
.rules Remove -q from .rules (#46670) 2026-01-13 03:03:30 +00:00
AGENTS.md ai: Symlink an AGENTS.md file to .rules (#45939) 2026-01-19 15:29:42 +01:00
Cargo.lock language_models: Add image support for Bedrock (#47673) 2026-02-13 12:41:14 +01:00
Cargo.toml markdown_preview: Add Mermaid Diagram Support (#49064) 2026-02-13 15:25:40 +05:30
CLAUDE.md Initial .rules file for agent with symlinks for other rules file paths (#29014) 2025-04-17 23:41:23 +00:00
clippy.toml Revert "Revert scheduler update (#46659)" (#46671) 2026-01-14 07:19:13 +00:00
CODE_OF_CONDUCT.md Remove community content from docs and point to zed.dev (#19895) 2024-10-29 09:44:58 -04:00
compose.yml Remove Postgres and stripe-mock from Docker Compose (#48313) 2026-02-04 03:42:58 +00:00
CONTRIBUTING.md Surface UI checklist in CONTRIBUTING.md (#49013) 2026-02-12 10:08:49 +00:00
debug.plist
default.nix nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
Dockerfile-collab build: Bump Rust version to 1.93 (#47358) 2026-01-23 13:22:41 +01:00
Dockerfile-collab.dockerignore
Dockerfile-cross.dockerignore Add remote server cross compilation (#19136) 2024-10-12 23:23:56 -07:00
Dockerfile-distros
Dockerfile-distros.dockerignore
flake.lock nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
flake.nix Try to improve nix caching (#48297) 2026-02-03 20:31:02 -07:00
GEMINI.md Add missing GEMINI.md rule file for gemini-cli (#38885) 2025-10-02 09:47:29 -04:00
LICENSE-AGPL Update license year (#24191) 2025-02-04 09:02:59 -05:00
LICENSE-APACHE Update license year (#24191) 2025-02-04 09:02:59 -05:00
LICENSE-GPL
livekit.yaml
lychee.toml ci: Check for broken links (#30844) 2025-06-06 09:39:35 +00:00
Procfile Update instructions for local collaboration (#35689) 2025-08-06 11:10:28 -07:00
Procfile.all Add agent thread sharing (#46140) 2026-01-06 12:49:51 -08:00
Procfile.web Remove PostgREST (#41299) 2025-10-27 13:27:59 -04:00
README.md Add sponsor button to main Zed repo (#46807) 2026-01-14 10:38:51 -06:00
renovate.json Remove workspace-hack (#40216) 2025-10-17 18:58:14 +00:00
REVIEWERS.conl Remove previous teammates from REVIEWERS.conl (#46934) 2026-01-15 18:43:34 +00:00
rust-toolchain.toml toolchain: Include rust-src in the rust-toolchain components (#48210) 2026-02-02 21:07:42 +00:00
rustfmt.toml nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
shell.nix nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
typos.toml Support LSP document symbols in breadcrumbs and outline UI (#48780) 2026-02-11 21:30:03 +02:00

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

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.