docs: auto-update for merged PRs (2026-08-06)

[aheritier]

This PR updates documentation to reflect code changes merged into main in the last 36 hours.

Documentation Changes

Filesystem Tool (/docs/tools/filesystem/index.md)

• PR feat(filesystem): say when list_directory finds an empty directory #3912: Added documentation for empty directory detection in list_directory
  • Now explicitly reports when a directory is empty
  • Distinguishes between truly empty directories and directories with all entries hidden by ignore patterns
  • Helps models avoid unnecessary shell command retries

Shell Tool (/docs/tools/shell/index.md)

• PR feat(shell): name the resolved interpreter in the shell tool description #3911: Added documentation for shell interpreter detection
  • The shell tool now names the resolved interpreter (bash, zsh, powershell, etc.) in its description
  • Includes OS information (Linux, macOS, Windows) to help models use correct syntax
  • Provides shell-specific syntax hints (e.g., PowerShell vs POSIX)
  • Reduces wasted turns from incorrect shell syntax assumptions

Source PRs

• #3911 - feat(shell): name the resolved interpreter in the shell tool description
• #3912 - feat(filesystem): say when list_directory finds an empty directory

PRs Not Requiring Doc Changes

The following merged PRs did not require documentation updates:

• #3915 - docs: update CHANGELOG.md for v1.122.0 (CHANGELOG only)
• #3914 - fix(tui): preserve stream cancellation after compaction (internal TUI behavior)
• #3913 - fix(filesystem): repair malformed inner JSON in double-serialized edits (internal implementation)
• #3910 - docs: update CHANGELOG.md for v1.121.0 (CHANGELOG only)
• #3909 - docs: auto-update for merged PRs (2026-08-05) (previous docs update)
• #3899 - feat(tui): configurable interrupt confirmation for Esc key (already documented in docs: auto-update for merged PRs (2026-08-05) #3909)
• #3833 - fix(backgroundjobs): resolve status race condition and subprocess pipe hang (internal implementation)
• #3831 - fix: agent security and linting improvements (internal changes)
• #3795 - fix(tui): resolve cross-platform root detection and fallback paths in pickers (internal TUI behavior)
• #3792 - fix: resolve POSIX path handling and test failures on Windows (docs updated in the PR itself)