Closes: https://github.com/zed-industries/zed/issues/37089

Instead of looking for the gemini command on `$PATH`, by default we'll
install our own copy on demand under our data dir, as we already do for
language servers and debug adapters. This also means we can handle
keeping the binary up to date instead of prompting the user to upgrade.

Notes:

- The download is only triggered if you open a new Gemini thread
- Custom commands from `agent_servers.gemini` in settings are respected
as before
- A new `agent_servers.gemini.ignore_system_version` setting is added,
similar to the existing settings for language servers. It's `true` by
default, and setting it to `false` disables the automatic download and
makes Zed search `$PATH` as before.
- If `agent_servers.gemini.ignore_system_version` is `false` and no
binary is found on `$PATH`, we'll fall back to automatic installation.
If it's `false` and a binary is found, but the version is older than
v0.2.1, we'll show an error.

Release Notes:

- acp: By default, Zed will now download and use a private copy of the
Gemini CLI binary, instead of searching your `$PATH`. To make Zed search
your `$PATH` for Gemini CLI before attempting to download it, use the
following setting:

```
{
  "agent_servers": {
    "gemini": {
      "ignore_system_version": false
    }
  }
}
```

Release Notes:

- ACP agents now respect the always_allow_tool_actions setting

Closes #37043

Previously claude sonnet 4 was missing from copilot as it was colliding
with zed's claude-sonnet-4 model id. Now we do deduplication based upon
model and provider id both.

| Before | After |
|--------|--------|
| <img width="784" height="950" alt="CleanShot 2025-08-28 at 18 31
28@2x"
src="https://github.com/user-attachments/assets/d49d5a17-7271-417d-bb5e-bc380071e810"
/> | <img width="720" height="876" alt="CleanShot 2025-08-28 at 18 31
42@2x"
src="https://github.com/user-attachments/assets/a5100c05-994e-4e19-ab20-34c0258b977c"
/> |

Release Notes:

- Fixed an issue where models with the same ID from different providers
(such as Claude Sonnet 4 from both Zed and Copilot) were incorrectly
deduplicated in the model selector—now all variants are shown.

Release Notes:

- agent: Fixed a bug that canceled editing when scrolling the user
message out of view.

Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>

Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Cole Miller <cole@zed.dev>
Co-authored-by: Joseph T. Lyons <JosephTLyons@gmail.com>
Co-authored-by: Katie Geer <katie@zed.dev>

Closes #37022
Closes #36994

This update ensures all Grok models use the JsonSchemaSubset format for
tool schemas.

A previous fix for this issue was too specific, only targeting grok-4
models. This caused other variants, like grok-code-fast-1, to be missed.
We've now broadened the logic to correctly apply the setting to the
entire Grok model family.

Release Notes:

- Fix tool calling for `x-ai/grok-code-fast-1` model via OpenRouter.

Release Notes:

- acp: Fix an issue where the model selector would sometimes be empty

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

Release Notes:

- acp: Fixed a bug that caused external agent server subprocesses to be
leaked.

---------

Co-authored-by: Agus Zubiaga <agus@zed.dev>
Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
Co-authored-by: Antonio Scandurra <me@as-cii.com>

Release Notes:

- N/A

Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>

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- **Pass --engine-strict to gemini install command**
- **Make it clearer that if upgrading fails, you need to fix i**

Closes #ISSUE

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- Add the `grok-code-fast-1` model to xAI's list of available models.

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- N/A

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

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- N/A

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---------

Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>

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---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

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---------

Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>

Reverts zed-industries/zed#36722

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---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

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---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

Previously, we wouldn't finalize the diff if an error occurred during
editing or the tool call was canceled.

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- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

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Closes #ISSUE

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---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Matt Miller <mattrx@gmail.com>

Release Notes:

- N/A

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

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---------

Co-authored-by: Cole Miller <cole@zed.dev>

Adds support for per-session prompt capabilities and capability changes
on the Zed side (ACP itself still only has per-connection static
capabilities for now), and uses it to reflect image support accurately
in 1PA threads based on the currently-selected model.

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- N/A

Using prompt injection, the agent may be tricked into making a fetch
request that includes unexpected data from the conversation in the URL.

As agent conversations may contain sensitive information (like private
code, or
potentially even API keys), this seems bad.

The easiest way to prevent this is to require the user to look at the
URL
before the model is allowed to fetch it.

Thanks to @ant4g0nist for bringing this to our attention.

Release Notes:

- agent panel: The fetch tool now requires confirmation.

Release Notes:

- N/A

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

A beta user reported that following was "lost" when asking for
confirmation, I
suspect they moved their cursor in the agent file while reviewing the
change.
Now we will resume following when the agent starts up again.

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Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>

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In the thread view, when focusing on the user message, we display the
editing control container absolutely-positioned in the top right.
However, if there are no rules items and no restore checkpoint button
_and_ it is the very first message, the editing controls container would
be cut-off. This PR fixes that by giving it a bit more top padding.

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---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

We were rendering a Markdown link like `[Read file x.rs (lines
Y-Z)](@selection)` while the tool ran, but then switching to just `x.rs`
as soon as we got the file location from the tool call (due to an
if/else in the UI code that applies to all tools). This caused a
flicker, which is fixed by having `initial_title` return just the
filename from the input as it arrives instead of a link that we're going
to stop rendering almost immediately anyway.

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- N/A

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