## What changed
- Add the `shellSnapshotV2` executor capability and an optional shell snapshot request to `ExecParams`.
- Capture and restore Unix shell state and profile exports from an in-memory, attachment-scoped cache for `bash`, `zsh`, and `sh`.
- Apply environment policies, runtime `PATH` entries, sandbox context, and live managed-proxy settings when preparing restored commands.
- Bound snapshot size, capture time, scope length, and cache capacity, and fall back to the original command when capture fails.
## Testing
- Cover local, remote, TTY, sandboxed, and supported-shell execution, plus environment filtering, proxy handling, in-memory reuse, and capture failure fallback.
GitOrigin-RevId: 624f747972c249c88c6f10f42cf0af97b75b5541
## What changed
- Co-locate the Bash and zsh snapshot-script tests with
`codex-shell-command`, where `snapshot_script` is implemented.
- Add `tempfile` as a dev dependency for the relocated tests.
- Keep the higher-level snapshot lifecycle tests in `codex-core`.
GitOrigin-RevId: 6d5e9ab95962722f7c89ea40512bd70ee81d8da2
## What changed
- Add a public `snapshot_script` helper to `codex-shell-command` for Bash,
Zsh, POSIX shell, and PowerShell, returning `None` for Command Prompt.
- Update `codex-core` and its shell snapshot tests to use the shared helper
without changing snapshot behavior.
GitOrigin-RevId: 779b9dc964635b717922ea9f5646b94c4dbb0da1
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