This PR improves the subscription states in the Agent configuration view
to the new billing system.

Zed Free (legacy):

<img width="638" alt="Screenshot 2025-05-08 at 8 42 59 AM"
src="https://github.com/user-attachments/assets/7b62d4c1-2a9c-4c6a-aa8f-060730b6d7b3"
/>

Zed Free (new):

<img width="640" alt="Screenshot 2025-05-08 at 8 43 56 AM"
src="https://github.com/user-attachments/assets/8a48448e-813e-4633-955d-623d3e6d603c"
/>

Zed Pro trial:

<img width="641" alt="Screenshot 2025-05-08 at 8 45 52 AM"
src="https://github.com/user-attachments/assets/1ec7ee62-e954-48e7-8447-4584527307c9"
/>

Zed Pro:

<img width="636" alt="Screenshot 2025-05-08 at 8 47 21 AM"
src="https://github.com/user-attachments/assets/f934b2e3-0943-4b78-b8dc-0a31e731d8fb"
/>

Release Notes:

- agent: Improved the subscription-related information in the
configuration view.

This PR makes it so staff are treated as having opted-in to usage-based
pricing.

Release Notes:

- N/A

tiktoken_rs is a bit behind (and even upstream tiktoken doesn't have all
of these models)

We were incorrectly using the cl100k tokenizer for some models that
actually use the o200k tokenizers. So that is updated.

I also made the match arms specific so that we do a better job of
catching whether or not tiktoken-rs accurately supports new models we
add in.

I will also do a PR upstream to see if we can move some of this logic
back out if tiktoken better supports the newer models.

Release Notes:

- Improved tokenizer support for openai models.

Release Notes:

- Improved latency when the agent applies edits.

This PR renames a number of constructs in the `agent` crate from the
"Assistant" terminology to "Agent".

Not comprehensive, but it's a start.

Release Notes:

- N/A

This PR removes the `assistant` crate, as it is no longer used.

Release Notes:

- N/A

cc @danilo-leal 

Release Notes:

- N/A

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

Makes it easier to review the Agent edits since more of the previous
edits will be visible on screen.

Release Notes:

- N/A

Closes #30056

Apparently the API supports the "default" field now, so we can remove
that transformation.
However, optional is not supported

See https://ai.google.dev/api/caching#Schema

Release Notes:

- agent: Improve tool schema compatibility for Gemini models

Release Notes:

- Added `mistral-medium` to the Mistral provider.

When deciding if a model supports tools or not, we weren't reading from
the configured model in a given thread.

This also stores the profile on the thread, which matches the behavior
of the Model and Max Mode, which we also already store per thread.

Hopefully this helps alleviate some confusion.

Release Notes:

- agent: Save profile selection per-Agent thread

### Todo

* [x] Allow opening `ssh://username@host:/` from the CLI
* [x] Allow selecting `/` in the `open path` picker
* [x] Allow selecting the home directory in the `open path` picker

Release Notes:

- Changed the initial state of the SSH project picker to show the full
path to your home directory on the remote machine, instead of `~`.
- Added the ability to open `/` as a project folder over SSH

---------

Co-authored-by: Agus Zubiaga <hi@aguz.me>

Release Notes:

- N/A

Copilot chat still returns a 400 if the dummy tool uses the `{}` schema.

This is a follow-up to https://github.com/zed-industries/zed/pull/30007.

Release Notes:

- Fixed a bug where agent edits would fail when using GitHub Copilot
Chat.

Co-authored-by: Agus Zubiaga <hi@aguz.me>

Tone down the grid background a bit more so text is more legible.

Release Notes:

- N/A

Release Notes:

- agent: Fix "consecutive tool use limit" callout spacing

Closes #30091
Follow-up to #29958

This PR fixes the profile menu flickering due to the documentation aside
after updating the agent dock position over the settings file.

The problem arose because the `documentation_side` could get out of sync
with the actual agent panel dock position. The `documentation_side` was
only updated whenever the user changed the agent panel position using
the UI, but not when updating the position in the settings file.

You can reproduce this easily by changing the `agent.dock` position to
the opposite site in your settings, which will make the profile menu
flicker again in some scenarios due to the de-sync.

This PR fixes this behavior by computing the position during render,
thus the actual set panel position and the documentation position can
never get out of sync

Release Notes:

- Fixed the agent profile menu flickering after updating the assistant
panel dock position in the settings.

This PR updates the copy around the Zed Pro description to be more
accurate.

Release Notes:

- agent: Updated some copy about Zed Pro in the configuration view.

Updated terms for Agent panel launch.

Release Notes:

- N/A

This PR makes it so we send up an `x-zed-version` header with the
client's version when making a request to llm.zed.dev for edit
predictions and completions.

Release Notes:

- N/A

Turns out `naive_local` doesn't actually offset a `DateTime<Utc>` to the
local timezone before creating a `NaiveDate`.

Release Notes:

- agent: Use correct timezone for thread history separators

Release Notes:

- Fixed a bug that would prevent the agent from working over SSH.

---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Richard Feldman <oss@rtfeldman.com>
Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Cole Miller <m@cole-miller.net>

Release Notes:

- N/A

---------

Co-authored-by: Julia Ryan <juliaryan3.14@gmail.com>

Also swapped out the svgs for `ThumbsDown` and `ThumbsUp`, and added
`DocumentText`.

Release Notes:

- N/A

<img width="458" alt="Screenshot 2025-05-07 at 9 37 39 AM"
src="https://github.com/user-attachments/assets/80f8a9b8-6a13-4e84-b91d-140e11475638"
/>

<img width="603" alt="Screenshot 2025-05-07 at 9 37 33 AM"
src="https://github.com/user-attachments/assets/7fe67a68-3885-4a0e-a282-aad37e92068b"
/>


Release Notes:

- Ollama models no longer require the supports_tools field in settings
(defaults to false)

---------

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

Cherry-picked Fix zero-sized message editors when context strip is empty
(#30079)

Release Notes:

- Fixed a bug that would cause the message composer in the agent panel
to not render when the context strip was empty.

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Nathan Sobo <nathan@zed.dev>

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Nathan Sobo <nathan@zed.dev>

Cherry-picked Avoid panic when opening thread as markdown in non-local
project (#30061)

Right now `agent: open active thread as markdown` will always panic when
you try to use it over collab or when SSH remoting. This PR makes it log
an error instead (we should follow up by restoring full remote support).

Release Notes:

- Prevented `agent: open active thread as markdown` from panicking when
used in a non-local project.

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

This PR removes all of the feature flag checks related to the Agent.

Tried to do this in the least invasive way possible; we can follow up
with a full removal.

Release Notes:

- N/A

Closes #29781

Tested this with llama3, gemma3 and qwen3.

This is a breaking change, which means after adding this code changes in
future version zed we will require atleast lmstudio >= 0.3.15. For
context why it's breaking changes check out the issue: #29781.

What this doesn't try to solve is:

* Tool calling, thinking text rendering. Will raise a seperate PR for
these as those are not required in this PR to make it work.


https://github.com/user-attachments/assets/945f9c73-6323-4a88-92e2-2219b760a249

Release Notes:

- lmstudio: Fixed Zed support for LMStudio >= v0.3.15 (breaking change -- older versions are no longer supported).

---------

Co-authored-by: Peter Tripp <peter@zed.dev>

This PR enables the Agent-related feature flags on the client.

Release Notes:

- N/A

This PR adds an onboarding banner for the Agent panel:

<img width="262" alt="Screenshot 2025-05-06 at 6 54 58 PM"
src="https://github.com/user-attachments/assets/52849e64-7d5d-488c-8456-4d7bd97f8ebd"
/>

Release Notes:

- N/A

This PR fixes an issue where the Git onboarding banner wasn't able to be
reset.

Release Notes:

- N/A

Adds time-bucket separators to the thread history list:


https://github.com/user-attachments/assets/c9ac3ec4-b632-4ea5-8234-382b48de2bd6

Note: I'm simulating that Today is next Thursday so that I can show the
"This Week" bucket.

Release Notes:

- agent: Add date separators to Thread History

Adds a new `agent.model_parameters` setting that allows the user to
specify a custom temperature for a provider AND/OR model:

```json5
    "model_parameters": [
      // To set parameters for all requests to OpenAI models:
      {
        "provider": "openai",
        "temperature": 0.5
      },
      // To set parameters for all requests in general:
      {
        "temperature": 0
      },
      // To set parameters for a specific provider and model:
      {
        "provider": "zed.dev",
        "model": "claude-3-7-sonnet-latest",
        "temperature": 1.0
      }
    ],
```

Release Notes:

- agent: Allow customizing temperature by provider/model

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Supersedes: https://github.com/zed-industries/zed/pull/29936

Thanks for your contribution @imumesh18, but we had a slightly different
take on it :)

Release Notes:

- N/A

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>

This PR makes it so we only show the trial upsell in the thread view.

Fixes https://github.com/zed-industries/zed/issues/30037.

Release Notes:

- Agent Beta: Changed the trial upsell to only be visible in the thread
view.

Release Notes:

- N/A

---------

Co-authored-by: Michael Sloan <mgsloan@gmail.com>

This PR updates the default Linux keybindings to align with changes made
to the macOS bindings in #29943.

Release Notes:

- N/A

Release Notes:

- N/A

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>

Release Notes:

- Fixed a panic that could sometimes occur when the agent applies edits.

Co-authored-by: Nathan <nathan@zed.dev>

This PR makes it so we don't render the trial upsell when not using the
Zed provider.

Release Notes:

- Agent Beta: Changed Zed Pro trial upsell to only be displayed when
using a model through the Zed provider.

Release Notes:

- Agent Beta: Fixed a bug that caused past failed tool calls to
incorrectly display as cancelled by the user.

This PR makes it so we don't render the usage callouts when not using
the Zed provider.

Release Notes:

- Agent Beta: Changed usage callouts to only be displayed when using a
model through the Zed provider.