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Rewind file tracking backs up gitignored secret files; add an exclude or an off switch

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  • Algo errado?
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Avaliação

Dificuldade
4/5
Tempo estimado
3-5 dias
Facilidade para iniciantes
42/100
Tipo de issue
Funcionalidade
Clareza
Razoavelmente clara
Status de atividade
Ativa
Stack de tecnologia
shell
Domínio
cli, security

Direção de pesquisa

The report identifies enableFileChangeTracking as the interactive CLI entry point and session-state/<session-id>/rewind-file-snapshots/backups/ plus index.json as the affected output. Start by tracing how the CLI enables tracking and how the tracker selects and writes files; the issue does not name source files or tests. Done means secret-file backups can be excluded or tracking disabled, and backups use mode 600.

Escrita pelo modelo de indexação a partir do texto da issue.

Descrição

area:sessions

Version: Copilot CLI 1.0.91, Linux x64, interactive mode.

What happens

Since /rewind became git-free (1.0.78), the CLI saves the earlier content of every file that a turn changes under the session's working directory into session-state/<session-id>/rewind-file-snapshots/backups/. Gitignored files are included. When the agent edits a .env file in a turn (for example to rotate an API token), the old file, with every secret in it, stays in session state as a plain file at mode 644. It stays there after the session ends.

A session with one long autonomous turn has one snapshot, so every file that turn changes is held in that snapshot.

What I checked

  • copilot help config, copilot help environment and copilot --help name no setting, flag or variable for rewind file tracking. respectGitignore covers only the @ file picker.
  • The interactive CLI starts each session with enableFileChangeTracking set to true as a constant. Only SDK clients can pass the option.
  • The tracker skips a file only for its size, a non-regular file or an unverifiable identity. It does not skip files that .gitignore excludes or files that hold secrets.

Steps to reproduce

  1. In a git repository, put .env.local in .gitignore and give it a line such as EXAMPLE_TOKEN=old-value.
  2. Start copilot in that repository and ask it to change the value to new-value with a shell command.
  3. List session-state/<session-id>/rewind-file-snapshots/backups/. One file holds EXAMPLE_TOKEN=old-value, and index.json maps it to .env.local.

Expected

A secret file that Copilot edits does not stay copied in session state. Any one of these would do:

  1. Skip files that .gitignore excludes, or files that match .env*, when the tracker saves earlier content. /rewind then lists them as not restorable.
  2. A setting, for example rewind.excludePatterns, that takes path patterns the tracker skips.
  3. A setting or flag that turns off file tracking, leaving conversation-only rewind.

Also: write the backups at mode 600, the same as the other session files.

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