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* feat(scripts): add --dry-run flag to create-new-feature scripts Add a --dry-run / -DryRun flag to both bash and PowerShell create-new-feature scripts that computes the next branch name, spec file path, and feature number without creating any branches, directories, or files. This enables external tools to query the next available name before running the full specify workflow. When combined with --json, the output includes a DRY_RUN field. Without --dry-run, behavior is completely unchanged. Closes #1931 Assisted-By: 🤖 Claude Code * fix(scripts): gate specs/ dir creation behind dry-run check Dry-run was unconditionally creating the root specs/ directory via mkdir -p / New-Item before the dry-run guard. This violated the documented contract of zero side effects. Also adds returncode assertion on git branch --list in tests and adds PowerShell dry-run test coverage (skipped when pwsh unavailable). Addresses review comments on #1998. Assisted-By: 🤖 Claude Code * fix: address PR review feedback - Gate `mkdir -p $SPECS_DIR` behind DRY_RUN check (bash + PowerShell) so dry-run creates zero directories - Add returncode assertion on `git branch --list` in test - Strengthen spec dir test to verify root `specs/` is not created - Add PowerShell dry-run test class (5 tests, skipped without pwsh) - Fix run_ps_script to use temp repo copy instead of project root Assisted-By: 🤖 Claude Code * fix: use git ls-remote for remote-aware dry-run numbering Dry-run now queries remote branches via `git ls-remote --heads` (read-only, no fetch) to account for remote-only branches when computing the next sequential number. This prevents dry-run from returning a number that already exists on a remote. Added test verifying dry-run sees remote-only higher-numbered branches and adjusts numbering accordingly. Assisted-By: 🤖 Claude Code * fix(scripts): deduplicate number extraction and branch scanning logic Extract shared _extract_highest_number helper (bash) and Get-HighestNumberFromNames (PowerShell) to eliminate duplicated number extraction patterns between local branch and remote ref scanning. Add SkipFetch/skip_fetch parameter to check_existing_branches / Get-NextBranchNumber so dry-run reuses the same function instead of inlining duplicate max-of-branches-and-specs logic. Assisted-By: 🤖 Claude Code * fix(tests): use isolated paths for remote branch test Move remote.git and second_clone directories under git_repo instead of git_repo.parent to prevent path collisions with parallel test workers. Assisted-By: 🤖 Claude Code * fix: address PR review feedback - Set GIT_TERMINAL_PROMPT=0 for git ls-remote calls to prevent credential prompts from blocking dry-run in automation scenarios - Add returncode assertion to test_dry_run_with_timestamp git branch --list check Assisted-By: 🤖 Claude Code