Cherry-picked language_models: Pass up `mode` from the
`LanguageModelRequest` (#29552)

This PR makes it so we pass up the `mode` from the
`LanguageModelRequest` when interacting with the Zed provider instead of
passing a hard-coded value.

Release Notes:

- agent: Fixed an issue where max mode was always being used.

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Cherry-picked Properly score fuzzy match queries with multiple chars in
lower case (#29794)

Closes https://github.com/zed-industries/zed/issues/29526

Release Notes:

- Fixed file finder crashing for certain file names with multiple chars
in lowercase form

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

Follow-up of https://github.com/zed-industries/zed/pull/28993

* Tone down tasks' cancellation logging
* Fix task terminals' leak, disallowing to fully cancel the task by
dropping the terminal off the pane:

https://github.com/zed-industries/zed/blob/f619d5f02af100c34e286af294a42a01dcfb238c/crates/terminal_view/src/terminal_panel.rs#L1464-L1471

Release Notes:

- Fixed tasks not being stopped on reruns

- Use common prefix length-based matching as primary criteria.
- Test added for multiple cases.

Before:
<img width="500" alt="image"
src="https://github.com/user-attachments/assets/8c653225-cac2-41bd-95f0-0fb8724284c9"
/>

After:
<img width="500" alt="image"
src="https://github.com/user-attachments/assets/a3d59399-cff2-435d-9b56-69a530f35da4"
/>

Release Notes:

- Fixed issues with code completions where they wouldn't show
completions with matched prefix at top.

Closes #ISSUE

Release Notes:

- N/A

Cherry-picked Revert "python: Enable subroot detection for pylsp and
pyright (#27364)" (#29658)

This reverts commit e661a0afd64e3e6e1e51c981cb7bda4e0af724fd.

Closes #ISSUE

Release Notes:

- Reverted changes to Python subroot detection which could have caused
multiple python processes to be spawned when working in projects with
multiple `pyproject.toml` files.

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

Since around the time we shipped block diagnostics, we've been seeing an
out of range panic in the editor.

Although the code is heavily inlined, so the stacktrace is missing, this
seems like a likely place that indexing may have gone wrong.

Release Notes:

- Fixed a rare panic in the editor

These were made Default in #29208, but rather than pull that entire commit in to fix this, I'm resolving manually.

Release Notes:

- N/A

The `grep` tool used to include 4 lines of context around the match, but
the lines included would often be unhelpful. This PR improves this
behavior by using the range of the parent syntax node that contains the
full line(s) matched.

The match headers will also now include symbol breadcrumbs so that the
model can already gather code structure before/without reading files.

````md
### impl GitRepository for RealGitRepository › fn compare_checkpoints › L1278-1284
```rust
                let result = git
                    .run(&[
                        "diff-tree",
                        "--quiet",
                        &left.commit_sha.to_string(),
                        &right.commit_sha.to_string(),
                    ])
```
````

This positively impacts the `add_arg_to_trait_method` eval example with
better diff output, fewer tool failures, and reduced total turns.

Note: We have some plans to use a an "elision" approach where we would
combine all matches for a given file, skipping lines between them while
keeping symbol declaration lines. The theory is that this would be map
more closely to the expected input for edits. For now, this PR is a
significant improvement.

Release Notes:

- Agent: Enrich `grep` tool output with syntax information

Fixes a regression from #29055, resolves #29290

Release Notes:

- agent: Fixed a regression that rendered Claude 3.7 Thinking unusable
on Bedrock.

Also, don't require a worktree to run the terminal tool.

Release Notes:

- N/A

This PR changes the default fast model for the Zed provider from Claude
3.5 Haiku to Claude 3.5 Sonnet.

We don't offer Claude 3.5 Haiku to users.

Closes https://github.com/zed-industries/zed/issues/29505.

Release Notes:

- agent: Changed the default fast model for the Zed provider to Claude
3.5 Sonnet.

Re-enabled instructions about code block formatting.

In practice, the model doesn't seem to use these very often, but there's
no negative effect on evals. In a future PR, I'll experiment with adding
more evals around the model actually using the code blocks.

2 runs before: (`--repetitions=8`)
```
=================================================================
                            AGGREGATE
=================================================================


4 examples failed to run!
Average programmatic score: 37%
Average diff score: 66%
Average thread score: 93%


-----------------------------------------------------------------
                     CUMULATIVE TOOL METRICS
-----------------------------------------------------------------

┌──────────────────────────────┬──────────┬──────────┬──────────┐
│             Tool             │   Uses   │ Failures │   Rate   │
├──────────────────────────────┼──────────┼──────────┼──────────┤
│edit_file                     │   398    │    53    │   13%    │
│terminal                      │    11    │    1     │    9%    │
│create_file                   │    40    │    2     │    5%    │
│read_file                     │   245    │    8     │    3%    │
│find_path                     │    48    │    0     │    0%    │
│list_directory                │    13    │    0     │    0%    │
│grep                          │   133    │    0     │    0%    │
│thinking                      │    18    │    0     │    0%    │
│diagnostics                   │   130    │    0     │    0%    │
```

```
=================================================================
                            AGGREGATE
=================================================================


1 examples failed to run!
Average programmatic score: 41%
Average diff score: 68%
Average thread score: 96%


-----------------------------------------------------------------
                     CUMULATIVE TOOL METRICS
-----------------------------------------------------------------

┌──────────────────────────────┬──────────┬──────────┬──────────┐
│             Tool             │   Uses   │ Failures │   Rate   │
├──────────────────────────────┼──────────┼──────────┼──────────┤
│fetch                         │    1     │    1     │   100%   │
│edit_file                     │   553    │    63    │   11%    │
│read_file                     │   349    │    3     │    1%    │
│diagnostics                   │   158    │    0     │    0%    │
│find_path                     │    70    │    0     │    0%    │
│list_directory                │    10    │    0     │    0%    │
│thinking                      │    45    │    0     │    0%    │
│grep                          │   213    │    0     │    0%    │
│create_file                   │    24    │    0     │    0%    │
│terminal                      │    17    │    0     │    0%    │
└──────────────────────────────┴──────────┴──────────┴──────────┘
```

1 run after this change:

```
=================================================================
                            AGGREGATE
=================================================================

Average programmatic score: 42%
Average diff score: 74%
Average thread score: 100%


-----------------------------------------------------------------
                     CUMULATIVE TOOL METRICS
-----------------------------------------------------------------

┌──────────────────────────────┬──────────┬──────────┬──────────┐
│             Tool             │   Uses   │ Failures │   Rate   │
├──────────────────────────────┼──────────┼──────────┼──────────┤
│edit_file                     │   534    │    92    │   17%    │
│read_file                     │   325    │    6     │    2%    │
│list_directory                │    6     │    0     │    0%    │
│thinking                      │    12    │    0     │    0%    │
│create_file                   │    16    │    0     │    0%    │
│diagnostics                   │    49    │    0     │    0%    │
│grep                          │   234    │    0     │    0%    │
│find_path                     │    65    │    0     │    0%    │
│terminal                      │    38    │    0     │    0%    │
└──────────────────────────────┴──────────┴──────────┴──────────┘
```


Release Notes:

- N/A

Release Notes:

- agent: Add support for @mentioning images
- agent: Add support for including images via file context picker

---------

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

Release Notes:

- N/A

Release Notes:

- agent: Improve MCP tools compatibility with Gemini models

cc @notpeter

Before this change we used our own copy of `cx.key_context()` when
matching.
This led to races where the context queried could be either before (or
after) the
context used in dispatching.

To avoid the race, gpui now passes out the context stack actually used
instead.

Release Notes:

- Fixed a bug where the Key Context View could show the incorrect
context,
  causing confusing results.

If you have the VRAM you can increase the context by adding this to your
settings.json:

```json
  "language_models": {
    "ollama": {
      "available_models": [
        { "max_tokens": 65536, "name": "qwen3", "display_name": "Qwen3-64k" }
      ]
    }
  },
```

Release Notes:

- ollama: Add support for Qwen3. Defaults to 16K token context. See:
[Assistant Configuration
Docs](https://zed.dev/docs/assistant/configuration#ollama-context) to
increase.

Add deepseek-v3 max token length for ollama

Release Notes:

- N/A

These were nearly always used when using `format!` / `write!` etc, so it
makes sense to not have an intermediate `String`.

Release Notes:

- N/A

When using the agent with a project shared by a collaborator, rules file
loading didn't work as it was trying to read from the client's
filesystem

Release Notes:

- Fixed rules file loading when using the agent with a project shared by
a collaborator.

This PR puts the displaying of the plan in the user menu behind the
`new-billing` feature flag instead of the old `zed-pro` feature flag.

Release Notes:

- N/A

This PR adds the `FeatureFlag` suffix to the feature flag types that
were missing them.

This makes the names easier to search in the codebase.

Release Notes:

- N/A

This PR removes the `remoting` feature flag.

The feature is shipped, and we aren't referencing the flag anywhere
anymore.

Release Notes:

- N/A

This PR addresses the behavior of the agent's terminal tool when the
executed command is interrupted or fails after producing some output.
Currently, if the command doesn't finish successfully, any partial
output captured before the interruption/failure is discarded, and only
an error message (or a generic cancellation message) is returned to the
LLM.

This change modifies the `run_command_limited` function in the terminal
tool to catch errors when awaiting the command's status (which includes
interruptions). In the case of such an error, it now includes any
partial stdout/stderr captured up to that point within the error message
returned to the `ToolUseState`. This ensures the LLM receives the
partial context even when the command doesn't complete cleanly, framed
appropriately as part of an error/interruption message.

Closes #29101

Release Notes:

- N/A

This PR wires the counting of Google AI tokens back up.

It now goes through the LLM service instead of collab's RPC.

Still only available for Zed staff.

Release Notes:

- N/A

This PR makes it so we pass up the `mode` for completion requests
through the Zed provider.

Release Notes:

- N/A

This PR removes the `CountLanguageModelTokens` RPC message from collab.

We were only using this for Google AI models through the Zed provider
(which is only available to Zed staff).

For now we're returning `0`, but will bring back soon.

Release Notes:

- N/A

This PR removes the embeddings-related code from collab and the
protocol, as we weren't using it anywhere.

Release Notes:

- N/A

This change updates the system prompt to conditionally include
`grep`-related instructions based on whether the `grep` tool is enabled.

Implementation details:
1. Add a `has_tool` handlebars helper.
2. Pass the `model` to all locations where the prompt is built.
3. Use `{{#if has_tool "grep"}}` in the system prompt to gate
`grep`-specific instructions.

Testing:
- Unit tests for the `hasTool` helper.
- Unit tests to verify that `grep`-related instructions are included /
omitted from the prompt as appropriate.
- Manual agent evaluation:
- Setup: Asked the Agent "List all impls of MyTrait in the project"
using a custom "No tools" profile (all tools disabled).
- Before the change: The Agent attempted to call `grep`, encountered an
error, then realized the tool was unavailable.
- After the change: The Agent immediately asked to enable a search tool.

Note: in principle, `grep`/`read_file` tool descriptions alone might be
enough, but to confirm this we need more evaluation. If it turns out to
be true, we'll be able to remove grep-specific instructions from the
system prompt and undo this change.

Release Notes:

- N/A

This PR adds a "max mode" toggle to the Agent panel, for models that
support it.

Only visible to folks in the `new-billing` feature flag.

Icon is just a placeholder.

Release Notes:

- N/A

* Brings back hover popover of selection context.

* Adds hover popover for symbol, rules, and thread context.

* Makes context attached to messages display the names / content at
attachment time.

* Adds the file name as the displayed parent of symbol context.

* Brings back `impl Component for AddedContext`

Release Notes:

- N/A

---------

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

Truncation to a 32 bit `usize` could cause two distinct IDs to be
considered the same element.

Release Notes:

- N/A

Cherry-picked askpass: Shell escape Zed path in askpass script (#29447)

Closes #29439

Add shell escaping as well as additional sanity check for Zed path when
used in askpass. This caused issues on preview and nightly as the
standard paths for those releases contain spaces which were not escaped
appropriately leading to erroneous "Permission denied" errors from SSH
when the askpass script failed

Release Notes:

- Fixed a missing shell-escape in askpass resulting in erroneous
"Permission denied" errors when trying to connect to a remote server
over ssh (effecting preview release v0.184.1 and nightly only)

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

Namely, this PR removes the layout shift when you click on a user
message to edit it and displays the feedback disclaimer only upon
hovering the thumbs up/down button container.

Release Notes:

- N/A

This also fixes a little UI bug where the text thread title would push
the buttons away from the UI when there was still space.

Release Notes:

- agent: Made text thread titles editable again.

---------

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

One motivation is that the outlines returned by `read_file` for large
files list line numbers assuming an inclusive `end_line`. As a result,
when the agent uses these outlines for `read_line` calls, it would
otherwise miss the last line.

Release Notes:

- N/A

Sometimes Gemini would report `Content` without a `parts` field.

Release Notes:

- Fixed a bug that would sometimes cause Gemini models to fail streaming
their response.

Add new test and improve fuzzy match bucket logic which results into far
better balance between LSP and fuzzy search.

Before:
<img width="500" alt="before"
src="https://github.com/user-attachments/assets/3e8900a6-c0ff-4f37-b88e-b0e3783b7e9a"
/>

After:
<img width="500" alt="after"
src="https://github.com/user-attachments/assets/738c074c-d446-4697-aac6-9814362e88db"
/>

Release Notes:

- N/A

Added `snippet_sort_order`, which determines how snippets are sorted
relative to other completion items. It can have the values `top`,
`bottom`, or `inline`, with `inline` being the default.

This mimics VS Code’s setting:
https://code.visualstudio.com/docs/editing/intellisense#_snippets-in-suggestions

Release Notes:

- Added support for `snippet_sort_order` to control snippet sorting
behavior in code completion menus.

This makes it easy to have a label that looks like Markdown inline code
via the `inline_code(cx)` method.

Release Notes:

- N/A