### Summary:
- Ensure the external agents with ACP servers start via non-interactive
shells to prevent shell startup noise from corrupting JSON-RPC.
- Apply the same tweak to MCP stdio transports so remote context servers
aren’t affected by prompts or greetings.

### Description:
Switch both ACP and MCP stdio launch paths to call
`ShellBuilder::non_interactive()` before building the command. This
removes `-i` on POSIX shells, suppressing prompt/title sequences that
previously prefixed the first JSON line and caused `serde_json` parse
failures. No functional regressions are expected: both code paths only
need a shell for Windows/npm script compatibility, not for
interactivity.

Release Notes:
- Fixed external agents that hung on “Loading…” when shell startup
output broke JSON-RPC initialization.

Zed currently doesn’t support all protocol extensions implemented by
`clangd`, but it does support two:

- `textDocument/inactiveRegion`
- `textDocument/switchSourceHeader`

Release Notes:

- N/A

---------

Co-authored-by: Kunall Banerjee <hey@kimchiii.space>

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Closes https://github.com/zed-industries/zed/issues/39189

Release Notes:

- Fixed terminal hyperlinking not working for `file://` schemes with
windows drive letters

Fixes #33958

## Problem

When opening a terminal in Zed, `SHLVL` incorrectly starts at 2 instead
of 1. On `workspace: reload`, it increases by 2 instead of 1.

## Root Cause

1. Zed's `shell_env::capture()` spawns a login shell (`-l -i -c`) to
capture the user's environment, which increments `SHLVL`
2. The captured `SHLVL` is passed through to the PTY options
3. When alacritty_terminal spawns the user's shell, it increments
`SHLVL` again

Result: `SHLVL` = captured value + 1 = 2 (when launched from Finder)

## Solution

Remove `SHLVL` from the environment in `TerminalBuilder::new()` before
passing it to alacritty_terminal. This allows the spawned shell to
initialize `SHLVL` to 1 on its own, matching the behavior of standalone
terminal emulators like iTerm2, Kitty, and Alacritty.

## Testing

- Launch Zed from Finder → open terminal → `echo $SHLVL` → should output
`1`
- Launch Zed from shell → open terminal → `echo $SHLVL` → should output
`1`
- `workspace: reload` → open terminal → `echo $SHLVL` → should remain
`1`
- Tested with bash, zsh, fish

Release Notes:

- Fixed terminal `$SHLVL` starting at 2 instead of 1
([#33958](https://github.com/zed-industries/zed/issues/33958))

Also factor out some common code in the evals.

Release Notes:

- N/A

---------

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

This PR adds a staff-only button to the edit prediction menu for
capturing your current editing session as edit prediction example file.

When you click that button, it opens a markdown tab with the example. By
default, the most recent change that you've made is used as the expected
patch, and all of the previous events are used as the editing history.

<img width="303" height="123" alt="Screenshot 2025-12-14 at 6 58 33 PM"
src="https://github.com/user-attachments/assets/600c7bf2-7cf4-4d27-8cd4-8bb70d0b20b0"
/>

Release Notes:

- N/A

Closes #ISSUE

Release Notes:

- N/A

Imitating the approach of #41829. Prevents e.g. reverting a hunk and
having that excerpt yanked out from under the cursor.

Release Notes:

- git: Improved stability of excerpts when editing in the project diff.

The test `test_collaborating_with_completion` has a latent race
condition that hasn't manifested on CI yet but could cause hangs with
certain task orderings.

## The Bug

Commit `fd1494c31a` set up LSP request handlers AFTER typing the trigger
character:

```rust
// Type trigger first - spawns async tasks to send completion request
editor_b.update_in(cx_b, |editor, window, cx| {
    editor.handle_input(".", window, cx);
});

// THEN set up handlers (race condition!)
fake_language_server
    .set_request_handler::<lsp::request::Completion, _, _>(...)
    .next().await.unwrap();  // Waits for handler to receive a request
```

Whether this works depends on task scheduling order, which varies by
seed. If the completion request is processed before the handler is
registered, the request goes to `on_unhandled_notification` which claims
to handle it but sends no response, causing a hang.

## Changes

- Move handler setup BEFORE typing the trigger character
- Make `TestDispatcher::spawn_realtime` panic to prevent future
non-determinism from real OS threads
- Add `execution_hash()` and `execution_count()` to TestDispatcher for
debugging
- Add `DEBUG_SCHEDULER=1` logging for task execution tracing
- Document the investigation in `situation.md`

cc @localcc @SomeoneToIgnore (authors of related commits)

Release Notes:

- N/A

---------

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

This adds implementations of `std::iter::Sum` for `Pixels`, allowing the
use of `.sum()` on iterators of `Pixels` values.

### Changes
- Implement `Sum<Pixels>` for `Pixels` (owned values)
- Implement `Sum<&Pixels>` for `Pixels` (references)

This enables ergonomic patterns like:
```rust
let total: Pixels = pixel_values.iter().sum();
```

This change matches how normal hovers are handled (which early return
with `None` in this branch)

Release Notes:

- Fixed hover boxes for inlays blinking in and out without movement when
cursor blinking was enabled

Release Notes:

- N/A *or* Added/Fixed/Improved ...

- Public API: TestWindow<V> - the new typed test window wrapper
- Internal: TestPlatformWindow - the platform-level mock window (pub(crate))

TestApp provides a simpler alternative to TestAppContext with:
- Automatic effect flushing after updates
- Clean window creation returning typed TestAppWindow<V>
- Scene inspection via SceneSnapshot
- Input simulation helpers

Also adds:
- Background::as_solid() helper in color.rs
- SceneSnapshot for inspecting rendered quads/glyphs in scene.rs

Adds zed/crates/gpui/src/app/test_app.rs with:

- TestApp: test context that auto-runs until parked after updates
- TestAppWindow<V>: window wrapper with input simulation helpers

Minor improvement over TestAppContext/VisualTestContext - mainly
convenience (auto-parking, owned window handle, cleaner signatures).

Does NOT solve the deeper issues:
- Scene is still pub(crate), can't inspect rendered output
- Editor still needs FocusHandle which needs real GPUI context
- TestEditor duplication in ex still exists

3 tests included demonstrating basic usage.

When an external agent doesn't provide an icon, we were using different
fallback icons in all the places we display icons (settings view, thread
new menu, and the thread view toolbar itself).

Release Notes:

- N/A

Fix a bug where the branch picker would be dismissed before completing
the add remote flow, thus making Zed unable to add remote repositories
through the branch picker.

This bug was caused by the picker always being dismissed on the confirm
action, so the fix was stopping the branch modal from being dismissed
too early.

I also cleaned up the UI a bit and code.

1. Removed the loading field from the Branch delegate because it was
never used and the activity indicator will show remote add command if it
takes a while.
2. I replaced some async task spawning with the use of `cx.defer`.
3. Added a `add remote name` fake entry when the picker is in the name
remote state. I did this so the UI would be consistent with the other
states.
4. Added two regression tests. 
4.1 One to prevent this bug from occurring again:
https://github.com/zed-industries/zed/pull/44742
4.2 Another to prevent the early dismissal bug from occurring 
5. Made `init_branch_list_test` param order consistent with Zed's code
base

###### Updated UI
<img width="1150" height="298" alt="image"
src="https://github.com/user-attachments/assets/edead508-381c-4bd8-8a41-394dd5b7b781"
/>


Release Notes:

- N/A

This fixes the build when Visual Studio 2026 is installed.

Release Notes:

- N/A

Clarify the docs regarding how operators are affected when subword
motion in Vim is activated.

Ref:
https://github.com/zed-industries/zed/issues/23344#issuecomment-3186025873.

Release Notes:

- N/A

---------

Co-authored-by: Kunall Banerjee <hey@kimchiii.space>

Depends on: https://github.com/zed-industries/zed/pull/44753

Release Notes:

- N/A

---------

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

Add the repository name when:

- there's more than one repository, and
- the name of the active repository doesn't match the name of the
project (to avoid stuttering with the adjacent project switcher button)

Release Notes:

- The branch name in the title bar now includes the name of the current
repository when needed to disambiguate.

- Edit prediction providers can now be configured through the settings
UI
- Cleaned up the status bar menu to only show _configured_ providers
- Added to the status bar icon button tooltip the name of the active
provider
- Only display the data collection functionality under "Privacy" for the
Zed models
- Moved the Codestral edit prediction provider out of the Mistral
section in the agent panel into the settings UI
- Refined and improved UI and states for configuring GitHub Copilot as
both an agent and edit prediction provider

#### Todos before merge:

- [x] UI: Unify with settings UI style and tidy it all up
- [x] Unify Copilot modal `impl`s to use separate window
- [x] Remove stop light icons from GitHub modal
- [x] Make dismiss events work on GitHub modal
- [ ] Investigate workarounds to tell if Copilot authenticated even when
LSP not running


Release Notes:

- settings_ui: Added a section for configuring edit prediction providers
under AI > Edit Predictions, including Codestral and GitHub Copilot.
Once you've updated you can use the following link to open it:
zed://settings/edit_predictions.providers

---------

Co-authored-by: Ben Kunkle <ben@zed.dev>

Release Notes:

- N/A

Just a small docs change

With the deprecation of `toggle_relative_line_numbers` the docs should
reflect that

Release Notes:

- N/A

Enables rainbow bracket highlighting for angle brackets (< >) in C++.

<img width="401" height="46" alt="image"
src="https://github.com/user-attachments/assets/169afdaa-c8be-4b78-bf64-9cf08787eb47"
/>


Release Notes:

- Added rainbow bracket coloring for C++ angle brackets (`<>`)

This fixes an issue where a user could get confused by the branch picker
because it would only show the 10 most recent branches, instead of all
branches.

Release Notes:

- git: Show all branches in branch picker when search field is empty

Release Notes:

- N/A

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Agus Zubiaga <agus@zed.dev>

We were panicking whenever something went wrong with an example in the
CLI. This can be very disruptive when running many examples, and e.g a
single request fails. Instead, if running more than one example, errors
will now be logged alongside instructions to explore and re-run the
example by itself.

<img width="1454" height="744" alt="CleanShot 2025-12-12 at 13 32 04@2x"
src="https://github.com/user-attachments/assets/87c59e64-08b9-4461-af5b-03af5de94152"></img>


You can still opt in to stop as soon as en error occurs with the new
`--failfast` argument.

Release Notes:

- N/A

Closes #11643 

Release Notes:

- Fixed double hover state on windows

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

Improves the scheduler by allowing tasks to have a set priority which
will significantly improve responsiveness.

Release notes:

- N/A

---------

Co-authored-by: Yara <git@yara.blue>
Co-authored-by: dvdsk <noreply@davidsk.dev>

- Limit status lines to 10 in case `max_parallelism` is specified with a
grater value
- Handle logging gracefully rather than writing over it when clearing
status lines

Release Notes:

- N/A

Closes #41176 

Release Notes:

- Fixed SendKeystrokes mapping on windows

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

Reverts zed-industries/zed#35960
cc @cole-miller

---------

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

Currently we have a single cache for this data shared between all
snapshots which is incorrect, as we might update the cache to a new
version while having old snapshots around which then may try to access
new data with old offsets/rows.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Release Notes:

- N/A

Release Notes:

- N/A

Signed-off-by: Xiaobo Liu <cppcoffee@gmail.com>

Closes https://github.com/zed-industries/zed/issues/43992

Release Notes:

- Fixed remoting not working on some linux and mac systems

Update the issue template used for "Report a bug" to include a field
specifically for the user's keymap file, as we've seen multiple cases
where we end up asking the users for their custom keymap, to ensure that
they're not overriding existing defaults.

Release Notes:

- N/A

Partial revert of https://github.com/zed-industries/zed/pull/44631

With this and `sccache` enabled, I get 
<img width="3456" height="1096" alt="image"
src="https://github.com/user-attachments/assets/937760fb-8b53-49f8-ae63-4df1d31b292b"
/>

and r-a infinitely hangs waiting on this.

Release Notes:

- N/A

Follow up to https://github.com/zed-industries/zed/pull/42382

Release Notes:

- N/A *or* Added/Fixed/Improved ...

- Fix missing font features in 
  `git_ui::blame_ui::GitBlameRenderer.render_blame_entry`
- Fix missing buffer font features in
`markdown_preview::markdown_renderer`
- Update the way that the markdown style is built for hover popovers so
  that, for code blocks, the buffer font features are used.
- Introduce `gpui::Styled.font_features` to allow callers to also set
  the font's features, similar to how `gpui::Styled.font_family` already
  exists.

Relates to #44209

Release Notes:

- Fixed wrong font features in Blame UI, Hover Popover and Markdown
Preview

Closes #41567

We were using the git panel editor to check the focus where the commit
modal has its only editor.

Release Notes:

- Fixed an issue where commit and amend actions wouldn’t trigger when
using keybinds in the commit modal.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Update the behavior of `git::Amend` to ensure that the latest head
commit message, if available, is always loaded into the commit message
editor, regardless of its state. The previous text, if any, is now also
restored after the amend is finished.

- Update `FakeGitRepository.show` to include a message in the returned
`CommitDetails` so we can assert that this specific commit message is
set in the commit message editor.
- Add default implementation for `FakeGitRepository.commit` and
`FakeGitRepository.run_hook` to ensure that tests are able to run and
don't panic on `unimplemented!()`
- Refactor `GitPanel.load_last_commit_message_if_empty` to
`GitPanel.load_last_commit_message`, ensuring that the head commit
message is always loaded, regardless of whether the commit message
editor is empty.
- Update `GitPanel.commit_changes` to ensure that the pending amend
state is only updated if the editor managed to actually commit the
changes. This also ensures that we don't restore the commit message
editor's contents when amending a commit, before the amend is actually
processed.
- Update `CommitModal.amend`, removing the call to
`GitPanel.set_amend_pending` as that is now handled by the background
task created in `GitPanel.commit_changes`.
- Split the `commit` and `amend` methods from the event handlers so that
the methods can be called directly, as is now being done by
`CommitModal.on_commit` and `CommitModal.on_amend`.

Release Notes:

- Updated the ‎`git: amend` command to always load the latest head
commit message, and to restore any previously entered text in the commit
message editor after the amend completes

Closes #44510

Release Notes:

- Improve performance of terminal link matching even more