This PR is a follow-up to
https://github.com/zed-industries/zed/pull/29069 that fixes an issue
where the thread ID and prompt ID were not being sent up correctly.

Release Notes:

- N/A

This PR attaches the thread ID and the new prompt ID to telemetry events
for completions in the Agent panel.

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- N/A

---------

Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>

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Needed after #28915

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Containing everything in boxes wasn't super necessary here. Want to
still improve the switch color contrast here, but will probably do that
in a separate PR.

<img
src="https://github.com/user-attachments/assets/f826a7a8-beaf-45d0-9dc2-36dc210c418e"
width="700"/>

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- N/A

Related to #28490.

- Default prompts from the prompt library are now included as "user
rules" in the system prompt.
- Presence of these user rules is shown at the beginning of the thread
in the UI.
_ Now uses an `Entity<PromptStore>` instead of an `Arc<PromptStore>`.
Motivation for this is emitting a `PromptsUpdatedEvent`.
- Now disallows concurrent reloading of the system prompt. Before this
change it was possible for reloads to race.

Release Notes:

- agent: Added support for including default prompts from the Prompt
Library as "user rules" in the system prompt.

---------

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

Release Notes:

- N/A

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Cherry-picked Make Copy and Trim ignore empty lines, and fix vim line
selections (#29019)

Close #28519 

Release Notes:

Update `editor: copy and trim` command:

1. Ignore empty lines in the middle:

    ```
      Line 1

      Line 2
    ```

    Will copy text to clipboard:

    ```
    Line 1

    Line 2
    ```

    Before this commit trim not performed

1. Fix select use vim line selections, trim not works

Co-authored-by: redforks <redforks@gmail.com>

This PR makes it so the thread summarization also reports the model
request usage, to prevent the case where the count would appear to jump
by 2 the next time a message was sent after summarization.

Release Notes:

- N/A

This PR adds a banner showing request usage in the Agent panel:

<img width="640" alt="Screenshot 2025-04-17 at 5 51 46 PM"
src="https://github.com/user-attachments/assets/e0eb036c-57c1-441c-bbab-7dab1c6e56d9"
/>

Only visible to users on the new billing.

Note to Joseph: Doesn't need to be cherry-picked to Preview.

Release Notes:

- N/A

---------

Co-authored-by: Nate <nate@zed.dev>

This PR updates the Agent to extract the usage information from the
response headers, if they are present.

For now we just log the information, but we'll be using this soon to
populate some UI.

Release Notes:

- N/A

This PR updates the Zeta provider to extract the usage information from
the response headers, if they are present.

For now we just log the information, but we'll need to figure out where
this needs to get threaded through to in order to display it in the UI.

Release Notes:

- N/A

This PR makes it so we use more types and constants from the
`zed_llm_client` crate to avoid duplicating information.

Also updates the current usage endpoint to use limits derived from the
`Plan`.

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- N/A

This PR removes the `llm` module of the `rpc` crate in favor of using
the types from the `zed_llm_client`.

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- N/A

This PR adds a `plan` column to the `subscription_usages` table.

These tables don't have any records in them yet, so it's fine to make
the column required without a default.

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- N/A

This PR adds the `ZedProTrial` member to the `Plan` enum.

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Cherry-picked Fix multiline completions when surroundings don't match
completion text (#28995)

Follow up to the scenarios I overlooked in
https://github.com/zed-industries/zed/pull/28586.

Release Notes:

- N/A

Co-authored-by: João Marcos <marcospb19@hotmail.com>

Cherry-picked Revert "git_panel: Pad end of list to avoid obscuring
final entry with horizontal scrollbar (#28823)" (#28971)

This reverts commit 1d98b33ae07a72e9e26dc9b0b54a8baa4fd5f8c1.

Not sure why, but seems like this breaks the binary search used to
correlate items to each other in the lists.

Release Notes:

- N/A

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

Cherry-picked Escape all runnables' cargo extra arguments coming from
rust-analyzer (#28977)

Closes https://github.com/zed-industries/zed/issues/28947

Release Notes:

- Fixed certain doctests not being run properly

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

One more batch of fine-tuning the agent panel's design.

Release Notes:

- N/A

https://github.com/user-attachments/assets/42ebe911-3392-48f7-8583-caab285aca09

Release Notes:

- agent: Support adding selections via @selection or `assistant: Quote
selection` as context

Release Notes:

- Add support for OpenAI o3 and o4-mini models via OpenAI API and
Copilot Chat providers.

---------

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

lookup_snippets() merges global snippets and extension snippets, but
global_snippets::lookup_snippets() also returns extension snippets, make
them double

Closes #28661 

Release Notes:

- Fixed a bug where extension provided snippets were being displayed in
duplicate.

Just now realized that the reason this button wasn't working reliably is
because we weren't passing the index to it. It's now fixed.

Release Notes:

- N/A

There was recently a change that caused the Zed Edit Prediction provider
to only be assigned when the client was connected. However, this check
happened too early, resulting in restored buffers never getting
registered. We'll now subscribe to client status changes and reassign
providers accordingly.

Release Notes:

- edit prediction: Fixed bug disabling prediction in restored buffers

<img width="410" alt="image"
src="https://github.com/user-attachments/assets/e29a0ba8-3d37-4e66-b90c-398b24da0453"
/>


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Cherry-picked agent: Fix system instructions typo (#28949)

See #28793, the name of the field is actually `systemInstruction` not
`systemInstructions`.

Release Notes:

- Fixed an issue where Gemini requests would fail

Co-authored-by: Bennet Bo Fenner <bennet@zed.dev>

Cherry-picked Fix panic when diagnostics first opens (#28935)

Closes #ISSUE

Release Notes:

- N/A

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

Cherry-picked Fix more inlay/excerpt race conditions (#28914)

Closes #ISSUE

Release Notes:

- N/A

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

The UI was mistakenly using the cumulative token usage for the token
counter. It will now display the last request token count, plus an
estimation of the tokens in the message editor and context entries that
haven't been sent yet.


https://github.com/user-attachments/assets/0438c501-b850-4397-9135-57214ca3c07a

Additionally, when the user edits a message, we'll display the actual
token count up to it and estimate the tokens in the new message.

Note: We don't currently estimate the delta when switching profiles. In
the future, we want to use the count tokens API to measure every part of
the request and display a breakdown.

Release Notes:

- agent: Made the token count more accurate and added back estimation of
used tokens as you type and add context.

---------

Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

Release Notes:

- N/A

This makes the `assistant: Quote selection` work again for text threads.
Next up is supporting this also in normal threads.

Release Notes:

- agent: Add support for inserting selections (assistant: Quote
selection) into text threads

Release Notes:

- (preview only) Fixes a bug where some warnings were not rendered
correctly in the Diagnostics view

Cherry-picked Fix anchor_in_excerpt on replaced excerpts (#28880)

Release Notes:

- N/A

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

Release Notes:

- Preview: Removed the layout button from the title bar. The
`bottom_dock_layout` setting still functions.
- Added a setting, `bottom_dock_layout`, for controlling the
relationship between the bottom dock and the left and right docks.

Make fuzzy search in @-mention match paths and context kinds as well
(e.g., typing "sym" should let me select the "Symbols" label, as opposed
to just paths)

Release Notes:

- agent: Improve fuzzy-matching when using @mentions

Release Notes:

- agent: Added a menu item to open the Prompt Library from the panel's
dropdown menu on the top right.

Staff only for now. We'll work on making this usable for non zed.dev
users later

Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Some small adjustments to simplify the agent panel's design.

Release Notes:

- N/A

Cherry-picked Fix more panics when removing excerpts (#28836)

Release Notes:

- Fixed a panic when an excerpt removed has an edit suggestion inlay in
it

---------

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

Co-authored-by: Kirill Bulatov <kirill@zed.dev>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

This PR adds an error message when the model requests limit has been
hit.

Release Notes:

- N/A

Co-authored-by: Oleksiy Syvokon <oleksiy.syvokon@gmail.com>