ZIm/docs
Cale Sennett c2f0df9b8e Add capabilities to OpenAI-compatible model settings (#36370)
### TL;DR
* Adds `capabilities` configuration for OpenAI-compatible models
* Relates to
https://github.com/zed-industries/zed/issues/36215#issuecomment-3193920491

### Summary
This PR introduces support for configuring model capabilities for
OpenAI-compatible language models. The implementation addresses the
issue that not all OpenAI-compatible APIs support the same features -
for example, Cerebras' API explicitly does not support
`parallel_tool_calls` as documented in their [OpenAI compatibility
guide](https://inference-docs.cerebras.ai/resources/openai#currently-unsupported-openai-features).

### Changes

1. **Model Capabilities Structure**:
- Added `ModelCapabilityToggles` struct for UI representation with
boolean toggle states
- Implemented proper parsing of capability toggles into
`ModelCapabilities`

2. **UI Updates**:
- Modified the "Add LLM Provider" modal to include checkboxes for each
capability
- Each OpenAI-compatible model can now be configured with its specific
capabilities through the UI

3. **Configuration File Structure**:
- Updated the settings schema to support a `capabilities` object for
each `openai_compatible` model
- Each capability (`tools`, `images`, `parallel_tool_calls`,
`prompt_cache_key`) can be individually specified per model

### Example Configuration

```json
{
  "openai_compatible": {
    "Cerebras": {
      "api_url": "https://api.cerebras.ai/v1",
      "available_models": [
        {
          "name": "gpt-oss-120b",
          "max_tokens": 131000,
          "capabilities": {
            "tools": true,
            "images": false,
            "parallel_tool_calls": false,
            "prompt_cache_key": false
          }
        }
      ]
    }
  }
}
```

### Tests Added

- Added tests to verify default capability values are correctly applied
- Added tests to verify that deselected toggles are properly parsed as
`false`
- Added tests to verify that mixed capability selections work correctly

Thanks to @osyvokon for the desired `capabilities` configuration
structure!


Release Notes:

- OpenAI-compatible models now have configurable capabilities (#36370;
thanks @calesennett)

---------

Co-authored-by: Oleksiy Syvokon <oleksiy@zed.dev>
2025-08-18 12:35:08 +03:00
..
src Add capabilities to OpenAI-compatible model settings (#36370) 2025-08-18 12:35:08 +03:00
theme Add meta description tag to docs pages (#35112) 2025-07-29 23:01:03 +00:00
.gitignore Setup docs deployments with mdBook (#11369) 2024-05-03 15:52:15 -04:00
.prettierignore docs: Check formatting in CI (#15355) 2024-07-27 15:47:48 -04:00
.prettierrc ci: Add check for formatting default.json (#30034) 2025-05-06 18:55:26 +00:00
book.toml Add meta description tag to docs pages (#35112) 2025-07-29 23:01:03 +00:00
README.md Add meta description tag to docs pages (#35112) 2025-07-29 23:01:03 +00:00

Zed Docs

Welcome to Zed's documentation.

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mdbook serve docs

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Before committing, verify that the docs are formatted in the way Prettier expects with:

cd docs && pnpm dlx prettier@3.5.0 . --write && cd ..

Preprocessor

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If for some reason you need to bypass the docs preprocessor, you can comment out [preprocessor.zed_docs_preprocessor] from the book.toml.:

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Putting binary assets such as images in the Git repository will bloat the repository size over time.

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Table of Contents

The table of contents files (theme/page-toc.js and theme/page-doc.css) were initially generated by mdbook-pagetoc.

Since all this preprocessor does is generate the static assets, we don't need to keep it around once they have been generated.

Referencing Keybindings and Actions

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Keybindings:

{#kb scope::Action} - e.g., {#kb zed::OpenSettings}.

This will output a code element like: <code>Cmd+,|Ctrl+,</code>. We then use a client-side plugin to show the actual keybinding based on the user's platform.

By using the action name, we can ensure that the keybinding is always up-to-date rather than hardcoding the keybinding.

Actions:

{#action scope::Action} - e.g., {#action zed::OpenSettings}.

This will render a human-readable version of the action name, e.g., "zed: open settings", and will allow us to implement things like additional context on hover, etc.

Creating New Templates

Templates are just functions that modify the source of the docs pages (usually with a regex match & replace). You can see how the actions and keybindings are templated in crates/docs_preprocessor/src/main.rs for reference on how to create new templates.

References

  • Template Trait: crates/docs_preprocessor/src/templates.rs
  • Example template: crates/docs_preprocessor/src/templates/keybinding.rs
  • Client-side plugins: docs/theme/plugins.js

Postprocessor

A postprocessor is implemented as a sub-command of docs_preprocessor that wraps the builtin html renderer and applies post-processing to the html files, to add support for page-specific title and meta description values.

An example of the syntax can be found in git.md, as well as below

---
title: Some more detailed title for this page
description: A page-specific description
---

# Editor

The above will be transformed into (with non-relevant tags removed)

<head>
  <title>Editor | Some more detailed title for this page</title>
  <meta name="description" contents="A page-specific description" />
</head>
<body>
  <h1>Editor</h1>
</body>

If no front-matter is provided, or If one or both keys aren't provided, the title and description will be set based on the default-title and default-description keys in book.toml respectively.

Implementation details

Unfortunately, mdbook does not support post-processing like it does pre-processing, and only supports defining one description to put in the meta tag per book rather than per file. So in order to apply post-processing (necessary to modify the html head tags) the global book description is set to a marker value #description# and the html renderer is replaced with a sub-command of docs_preprocessor that wraps the builtin html renderer and applies post-processing to the html files, replacing the marker value and the <title>(.*)</title> with the contents of the front-matter if there is one.

Known limitations

The front-matter parsing is extremely simple, which avoids needing to take on an additional dependency, or implement full yaml parsing.

  • Double quotes and multi-line values are not supported, i.e. Keys and values must be entirely on the same line, with no double quotes around the value.

The following will not work:

---
title: Some
  Multi-line
  Title
---

And neither will:

---
title: "Some title"
---
  • The front-matter must be at the top of the file, with only white-space preceding it

  • The contents of the title and description will not be html-escaped. They should be simple ascii text with no unicode or emoji characters