[WilliamWang1721]

Result / 用户结果

Windows PowerShell tabs can now keep PowerShell's own ls/dir by setting builtin_ls=0 in pebrel_settings.txt. The default is unchanged: Nebula's ls/ll/dir listing stays on. Closes #549.

Design / 设计边界

• Responsibility and affected modules: the PowerShell integration script in nebula_terminal/src/tty/windows/mod.rs; the ls/ll/dir alias block now sits behind the existing Get-NebulaBoolSetting helper.
• Why this belongs here; interfaces that remain unchanged: the aliases are created by this script, so the opt-out lives next to them. Nebula-List stays defined; no Rust API, settings UI or persistence format changes (unknown keys are already preserved).
• Dependency, data-format, threading, or lifetime changes (ADR if applicable): none.
• Compatibility and migration/fallback behavior: key absent or invalid means the built-in listing, as before.

Evidence / 验证依据

• Commands and actual results (include unrun checks): not run locally; relying on PR CI.
• Regression tests: builtin_ls_aliases_can_be_opted_out checks the aliases sit behind the builtin_ls gate.
• UI changes: none.
• Hot-path changes: none.

Required Review / 必须确认

• I followed CONTRIBUTING.md, docs/architecture.md, and docs/project-constraints.md.
• I split responsibilities, not arbitrary line ranges; no duplicate behavior authority was added.
• python3 scripts/check_architecture.py --base <PR-base-commit> passes; budgets were not inflated to fit the change.
• Tests cover success and failure; platform/feature coverage limitations are stated.
• New messages use typed i18n IDs and matching placeholders; untranslated content has an explicit fallback.
• Governance changes include a counterexample, corrected contract, tests, and a maintainer-reviewed decision.