I ran into two usability problems in Copilot workspace sessions:

I ran into two usability problems in Copilot workspace sessions:

1. Ignored files cannot be edited from the Files window
Files like app/etc/env.php are intentionally git-ignored because they configure the local environment. In Magento projects these files are essential for local development. The Files window/editor can hide or make ignored files read-only, which makes local environment setup harder than necessary. There should be a way to show and edit ignored local files, preferably with a clear warning that they are ignored/sensitive and should not be committed.

2. Changes window compares against master instead of the checked-out branch upstream
In a session checked out on a feature branch, the Changes window compares the branch against origin/master. That is not always useful. When working on an existing feature branch, I usually want to see only what changed locally after the last commit, or the difference between my local branch and origin/. Comparing everything to master shows the whole feature branch history and makes it hard to see my actual current changes.

---
| Field | Value |
| --- | --- |
| App version | 1.1.12 |
| OS | macOS 26.2.0 |
| Theme | Monochrome |
| Path | /chat |
| Tenure | Week 2 |

無視されるローカルファイル（app/etc/env.php など）とチェックアウト済みの feature branch を使って、Files ウィンドウと Changes ウィンドウで両方の報告を再現する。ファイルの可視性と編集可能性、およびブランチ比較の動作について workspace のセッション処理を読み解く。無視されたファイルを明確な警告付きで編集でき、Changes に選択したブランチの関連するローカルまたは upstream の diff が表示されれば完了とする。

索引モデルが issue の本文から書いたものです。