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agent_ui: Fix expanded message editor staying auto-height during streaming (#55916)
Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments (Unsafe: none)
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable


## Summary
When the agent is streaming output, expanding the message editor can
appear to work (the container grows) but the input editor itself remains
constrained to auto-height (only a few lines). Toggling minimize →
expand makes it render correctly.

This PR ensures the message editor stays in full mode while expanded,
preventing automatic editor mode syncing on thread updates from
overriding the user's explicit expand action during streaming.

## Steps to reproduce
1. Start an agent thread and send a message that causes streaming output
2. While streaming, click “Expand Message Editor”
3. Observe the input editor still shows only a few lines (auto-height)
4. Click “Minimize Message Editor” and then expand again; it becomes
fully expanded

## Test plan
- Start an agent thread and let it stream
- Click “Expand Message Editor” while streaming
- Verify the editor actually expands (not limited to the auto-height max
lines)
- Toggle minimize/expand multiple times during streaming; verify it
remains correct

## Additional context
Repro video: 


https://github.com/user-attachments/assets/6e328fa8-d431-456a-b70a-864ae617ea88



Release Notes:

- Fixed message editor not fully expanding during agent generation

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>
2026-07-08 15:52:26 +00:00
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.cloudflare Staged docs releases (#50136) 2026-04-30 11:10:14 +00:00
.config Increase timeout for test_random_blocks (#50724) 2026-03-04 12:25:12 -05:00
.factory Add humanizer skill for AI writing pattern detection (#50021) 2026-02-24 14:58:52 -06:00
.github run_tests: Stop treating non-workspace dirs as packages (#60502) 2026-07-07 01:20:27 +00:00
.zed agent: Remove old edit file tool (#55612) 2026-05-04 09:54:39 +00:00
assets terminal: Open links with Cmd/Ctrl-click when mouse mode is enabled (#60067) 2026-07-08 12:41:48 +00:00
ci Move Nightly release to gh-workflow (#41349) 2025-10-28 13:57:23 -06:00
crates agent_ui: Fix expanded message editor staying auto-height during streaming (#55916) 2026-07-08 15:52:26 +00:00
docs project_panel: Open files in a permanent tab on middle click (#60563) 2026-07-08 13:06:10 +00:00
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tooling Add license symlinks to lint test fixture crates (#60505) 2026-07-07 01:35:06 +00:00
.git-blame-ignore-revs Add PR 50413 to .git-blame-ignore-revs (#50421) 2026-03-01 00:50:33 +01:00
.gitattributes windows: Make sure zed.sh using the correct line ending (#37650) 2025-09-05 16:25:55 +00:00
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.mailmap Update .mailmap (#47413) 2026-01-22 23:57:26 +05:30
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CLAUDE.md
clippy.toml Revert "Revert scheduler update (#46659)" (#46671) 2026-01-14 07:19:13 +00:00
CODE_OF_CONDUCT.md
compose.yml Remove Postgres and stripe-mock from Docker Compose (#48313) 2026-02-04 03:42:58 +00:00
CONTRIBUTING.md Re-add section about extension API to CONTRIBUTING.md (#59702) 2026-06-22 12:55:51 +00:00
debug.plist
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Dockerfile-collab Bump Rust version to 1.94 (#51086) 2026-03-30 09:06:59 +00:00
Dockerfile-collab.dockerignore
Dockerfile-cross.dockerignore
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Dockerfile-distros.dockerignore
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livekit.yaml
lychee.toml
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README.md docs: Remove readme junk (#60008) 2026-06-27 15:06:29 +00:00
renovate.json Remove workspace-hack (#40216) 2025-10-17 18:58:14 +00:00
REVIEWERS.conl Remove past reviewer (#51767) 2026-03-17 16:34:35 +00:00
rust-toolchain.toml Rust 1.95 (#55104) 2026-04-29 10:27:47 +00:00
rustfmt.toml nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
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typos.toml Update bundled JSON schemas (2026-04-29) (#58948) 2026-06-25 17:30:12 +00:00

Zed

Zed CI

Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.


Installation

On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).

Other platforms are not yet available:

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