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This PR makes it so we return an error to the model if it tries to use a
tool that is not currently enabled:

<img width="628" alt="Screenshot 2025-04-02 at 11 10 55 AM"
src="https://github.com/user-attachments/assets/e4bdf01c-f0ea-4c9c-805a-11868bd9c771"
/>

This allows the model to adapt based on that:

<img width="637" alt="Screenshot 2025-04-02 at 11 08 38 AM"
src="https://github.com/user-attachments/assets/41016b47-933c-4dcb-b791-847be0548c8a"
/>

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We were including the context at the end which meant it never got
cached. We'll now include it with the first message that introduced it
so it's cached as long as it doesn't change.

This is an improvement, but we probably still need to think of ways to
optimize caching for cases where files in context change.

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- N/A

It's super easy to undo those changes. In a future PR, we should also
avoid requiring confirmation in the batch tool if all the underlying
tools don't require confirmation.

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Closes #ISSUE

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- Fixed git repositories being added for files outside the project

This PR removes an unneeded `else if` branch that was the same as the
previous branch in the conditional.

Doesn't seem necessary to run this twice.

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I had introduced the same thing a few days ago without noticing there
was one in place already!

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<img
src="https://github.com/user-attachments/assets/76ae380c-6d5b-4ed6-9b47-9a4c44b00042"
width="500" />

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This PR makes it so if we receive a tool use from the model without any
corresponding text, we'll insert some placeholder text to keep the
conversation in a well-structured format.

This aims to fix an error that Antonio was seeing:


![image](https://github.com/user-attachments/assets/eeba95ef-9b67-41d7-bce3-afe84bcdc7b1)

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This PR updates the Copilot Chat language model to indicate it does not
yet support tool use in Zed.

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This PR updates the tool names in the default profiles, as they were not
updated after the tool names were changed to snake_case in #27903.

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This seems to improve the performance of `gemini-2.5-pro-exp-03-25`
significantly.
We know define a single `Tool` that has multiple `FunctionDeclaration`s,
instead of defining multiple `Tool`s with a single
`FunctionDeclaration`.
Oddly enough the `flash` models seemed to work perfectly fine with the
multiple `Tool { ... }` definitions

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The [Gemini
docs](https://ai.google.dev/gemini-api/docs/function-calling?example=weather#function_declarations)
state that function names should be in `snake_case` or `camelCase`.

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- Added `g?` convert to `Rot13`/`Rot47`

---------

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

Closes #ISSUE

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This PR renames the `assistant2` crate to `agent`.

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This PR bumps the revision of the `livekit-rust-sdks` crate.

I was running into issue where Cargo was stuck on "Updating git
submodule `https://chromium.googlesource.com/libyuv/libyuv`".

I resolved the issue by forking `libyuv` to
https://github.com/zed-industries/libyuv and updating our
`livekit-rust-sdks` fork to use it in
https://github.com/zed-industries/livekit-rust-sdks/pull/4.

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- N/A

Closes #ISSUE

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- Ensure that only one repository is shown in the git UI when two
subdirectories of a repository root are open in Zed

Release Notes:

- Added correct syntax highlighting for use bounds and async closures in
Rust.

- bump our livekit version to include a fix for a crane bug (TODO: add
link when an issue is filed on crane)
- switch to a clang stdenv for both linux and macos
- manually unify versions of our notify crate
- remove old linker flags which were only needed for livekit
- fix an issue where RUSTFLAGS shadowed the rustflags from cargo configs

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This PR updates the `ResetMode` enum to use doc comments for its
variants instead of line comments.

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---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>

We'll now prompt the user to start a new thread when the active one gets
too long.

<img width=500
src="https://github.com/user-attachments/assets/91445bc0-3e81-422f-aa4a-b8f0741f9d9a"></img>


When they click "Start New Thread", will create a new one with the
previous one added as context.

<img width=500
src="https://github.com/user-attachments/assets/c3b4223f-5bdd-4ba4-956f-5a5880d5e2c3"></img>

Instead of including the full thread text, we'll now add summarized
versions of threads to the context, allowing you to continue the
conversation even if it was near the token limit.

- Thread summaries are cached and persisted. 
- A cached summary is invalidated if the thread is continued.
- We start generating the thread summary as soon as it's selected from
the picker. Most times, the summary will be ready by the time the user
sends the message.
- If the summary isn't ready by the time a message is sent, the user
message will be displayed in the thread immediately, and a "Summarizing
context..." indicator will appear. After the summaries are ready, we'll
start generating the response and show the usual "Generating..."
indicator.

Release Notes:

- N/A

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Closes #20391

### Summary
This adds a persistence layer to the command palette so that usages can
persist after Zed is closed and re-opened.

The current "usage" algorithm is unchanged, e.g.:
- Sorts by number of usages descending (no recency preference)
- Once a user's query is active, removes these suggestions in favor of
fuzzy matching

There are some additional considerations in order to keep the DB from
growing uncontrollably (and to make long-term use ergonomic):
- The "invocations" count handles max values (though at u16, it seems
unlikely a user will deal with this)
- If a command is un-invoked for more than a month, it stops being
considered a recent usage, and its next update will update its usages
back to 1

### Future Considerations
- Could make the "command expiry" configurable in settings, so the user
can decide how long to hold onto recent usages
- Could make a more sophisticated algorithm which balances recency and
total invocations - e.g. if I've used COMMAND_A 100 times in the last
month, but COMMAND_B 10 times today, should COMMAND_B actually be
preferred?
- Could do preferential fuzzy-matching against these matches once the
user starts a query.

Release Notes:

- Added persistent history of command palette usages.

---------

Co-authored-by: Peter Finn <mastion11@gmail.com>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

This PR completes the process of moving git repository state storage and
scanning logic from the worktree crate to `project::git_store`.

Release Notes:

- N/A

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Conrad <conrad@zed.dev>

This PR renames the `assistant2` actions to `agent`.

Note that any `assistant` actions have been left as-is for now so that
there aren't any changes to users not in the feature flag.

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- N/A

This makes it easier to iterate on the nix flake by adding a package
which builds zed in debug mode rather than release

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- N/A

<img width=400
src="https://github.com/user-attachments/assets/4132e075-3f2a-4c65-8c06-c3428f3ad477">

<img width=400
src="https://github.com/user-attachments/assets/95908b32-a9b9-45c3-9db9-dcbeedffc5e7">

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Just adding to the existing https://zed.dev/docs/vim#ex-commands

Captial G is not used by vim commands.

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This PR adds some affordances for when the currently-selected model does
not support tools.

We disable the profile selector and put it into a "No Tools" state:

<img width="1394" alt="Screenshot 2025-04-01 at 3 58 00 PM"
src="https://github.com/user-attachments/assets/de6ecb0f-7657-4e16-9d5d-7bbfbc2b0a5c"
/>

We will also only attach tools to the request to the model if the model
supports it.

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Follow-up to https://github.com/zed-industries/zed/pull/27812

This PR makes sure these errors cases also show up in the panel's empty
state even when there is past data.

| No ToS | Missing Provider |
|--------|--------|
| ![CleanShot 2025-04-01 at 4  49
36@2x](https://github.com/user-attachments/assets/6da6bdc9-daa6-4a7b-a224-989eb845e205)
| ![CleanShot 2025-04-01 at 4  50
04@2x](https://github.com/user-attachments/assets/bddf62cb-3727-44b5-b115-9a88313c6d85)
|

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This should help the model maintain an accurate picture of the file as
it makes changes

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This PR adds a new `supports_tools` method to the `LanguageModel` trait
to indicate whether a given model supports tool use.

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ID collision!

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Follow-up to https://github.com/zed-industries/zed/pull/27636

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This PR updates some text in the Agent Panel to use the "agent"
nomenclature.

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Closes #ISSUE

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Closes https://github.com/zed-industries/zed/issues/27619

Fixes issue with right wrapped movement when a multi-byte character is
at the end of the line. This is done by grabbing the last character on
the current row and using that characters size to calculate the
`max_column` variable, which is used to decide if the next right
movement should move down the line or not.

We did notice a bit of code that could be an issue that we wanted to
call out.
[Here](https://github.com/zed-industries/zed/blob/main/crates/editor/src/display_map.rs#L1070)
inside of `clip_at_line_end` it also does a saturating_sub(1), assuming
a single byte character. We didn't run into any issues due to this line
but felt like a similar bug. We can apply a similar fix if wanted to
pose the question first.

Test case: Moving to next line when eol is a multi-byte character


https://github.com/user-attachments/assets/1021ab1f-f49d-4986-8f9a-8cfc7e5c91bc


Release Notes:

- Fixed issue in vim forward spacing when a multi-byte character is at
the eol

---------

Co-authored-by: KyleBarton <kjbarton4@gmail.com>

This PR adds a new, generic `Banner` component so that we can
potentially replace the multiple, isolated implementations of it
throughout some places of the app.

<img
src="https://github.com/user-attachments/assets/a268f745-1747-48e6-9461-2732eb7c0be4"
width="750"/>

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- N/A

Python envs created with virtualenvwrapper have the ability to link to
the project directory (via the `.project` file in the virtualenv).
`python-environment-tools` supports this and reports the project path.

Additionally, some tools (e.g virtualfish) recognize special
"environment activation" files in project directories (`.venv` by
default)
[1].

Use the above information to sort reported Python toolchains so that the
correct env for a given worktree is at the top.

[1]
https://virtualfish.readthedocs.io/en/latest/plugins.html#auto-activation-auto-activation

Release Notes:

- python: Improved detection of virtualenvwrapper environments in work
trees

Release Notes:

- Fixed a bug where the git panel displayed a commit's committer in
place of its author.

Release Notes:

- N/A

---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

This PR updates the Agent Panel tooltip in the status to use "Agent
Panel" instead of "Assistant Panel".

Also changes the name we use in workspace serialization.

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- N/A

This PR renames the key context for the Agent Panel from
"AssistantPanel2" to "AgentPanel".

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- N/A

This PR makes it so we include the `default_profile` and `profiles`
settings in the JSON schema.

This provides completions when editing the `settings.json`.

Release Notes:

- N/A