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original uri https://github.com/zed-industries/zed
https://zed.dev
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When `read_file` returns a file outline instead of full contents, the result is now wrapped in a plain fenced code block rather than tagging it with the file's path. Previously, the outline was wrapped in a fenced block tagged with the file path (e.g. `` ```crates/agent/src/tools/read_file_tool.rs ``). Because the tag contains a slash, the markdown parser routed it through `CodeBlockKind::FencedSrc`, resolved the file's language by path, and ran the language's tree-sitter parser against the outline on every paint. The outline is structural (e.g. `fn foo [L10-20]`), not actual source for the file's language, so the parse was both expensive and produced incorrect highlighting. Because GPUI rebuilds the visible element tree on every window paint, anything that triggers a repaint (cursor blink in the focused message editor, animations, the turn timer, etc.) would re-run the tree-sitter parse on the entire outline, throttling the frame rate while the tool call was expanded. This change adds an `is_outline_response` flag in `ReadFileTool::run` and, when set, passes an empty tag to `MarkdownCodeBlock` so the renderer sees `CodeBlockKind::Fenced` (no language). Plain monospace formatting is preserved; the path tag is still used for the non-outline (full file) case. Adds two regression tests: one asserting the outline path uses an untagged fenced block, and one asserting the full-file path keeps the path tag (so the next person fixing this doesn't accidentally strip the tag everywhere). Also includes a small markdown-rendering follow-up: `MarkdownElementBuilder::push_text` was recomputing the base text style (cloning `base_text_style` and walking the style stack) twice per highlighted token. For a code block with hundreds of highlight tokens, that's hundreds of redundant `TextStyle` clones per paint. The style stack does not change while runs are being attributed, so the style is now computed once outside the loop and reused. Closes AI-234 Release Notes: - Improved scrolling smoothness in the agent panel when a `read_file` tool call with a large file outline is expanded. |
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| .cargo | ||
| .cloudflare | ||
| .config | ||
| .factory | ||
| .github | ||
| .zed | ||
| assets | ||
| ci | ||
| crates | ||
| docs | ||
| extensions | ||
| legal | ||
| nix | ||
| script | ||
| tooling | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .prettierrc | ||
| .rules | ||
| AGENTS.md | ||
| Cargo.lock | ||
| Cargo.toml | ||
| CLAUDE.md | ||
| clippy.toml | ||
| CODE_OF_CONDUCT.md | ||
| compose.yml | ||
| CONTRIBUTING.md | ||
| debug.plist | ||
| default.nix | ||
| Dockerfile-collab | ||
| Dockerfile-collab.dockerignore | ||
| Dockerfile-cross.dockerignore | ||
| Dockerfile-distros | ||
| Dockerfile-distros.dockerignore | ||
| flake.lock | ||
| flake.nix | ||
| GEMINI.md | ||
| LICENSE-AGPL | ||
| LICENSE-APACHE | ||
| LICENSE-GPL | ||
| livekit.yaml | ||
| lychee.toml | ||
| Procfile | ||
| Procfile.all | ||
| Procfile.web | ||
| README.md | ||
| renovate.json | ||
| REVIEWERS.conl | ||
| rust-toolchain.toml | ||
| rustfmt.toml | ||
| shell.nix | ||
| typos.toml | ||
Zed
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:
- Web (tracking issue)
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 specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor 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 theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d 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.