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https://github.com/github/spec-kit.git
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86709f6089
* fix(scripts): portable uppercase for branch-name acronym retention
Branch-name generation keeps short uppercase acronyms (e.g. "AI") by re-checking
the lowercased word against the original description with ${word^^}. That
parameter expansion is bash 4+ only; on macOS's default bash 3.2 it errors with
"bad substitution", so the acronym/short-word retention branch never matches and
those words are dropped ("go AI now" yields 001-now instead of 001-ai-now). Use
tr '[:lower:]' '[:upper:]' instead, which is portable.
Applies to both the core create-new-feature.sh and the git extension's
create-new-feature-branch.sh. The existing
test_branch_name_short_word_case_sensitivity / test_short_word_retention tests
cover this and now pass on bash 3.2 (CI runs on bash 4+/Linux, so they passed
there already).
(Disclosure: an AI coding agent surfaced the failure while running the suite on
macOS and pinned the root cause; fix written and reviewed by me.)
* fix(scripts): portability follow-ups from code review
- core create-new-feature.sh: match the acronym with `grep -qw` (POSIX
whole-word) instead of `\b...\b` (GNU/BSD-only), matching the git extension
and dropping a non-POSIX construct.
- lint: add a CI guard rejecting bash 4+ case-modification expansions in *.sh.
shellcheck assumes bash 4+ from the shebang and can't flag them, and CI has no
bash-3.2 lane, so this prevents silently re-shipping the macOS regression this
PR fixes.
- update a stale PowerShell extension comment that cited the removed bash idiom.
(Disclosure: prompted by an AI code review of the PR; written and reviewed by me.)
Git Branching Workflow Extension
Git repository initialization, feature branch creation, numbering (sequential/timestamp), validation, remote detection, and auto-commit for Spec Kit.
Overview
This extension provides Git operations as an optional, self-contained module. It manages:
- Repository initialization with configurable commit messages
- Feature branch creation with sequential (
001-feature-name) or timestamp (20260319-143022-feature-name) numbering - Branch validation to ensure branches follow naming conventions
- Git remote detection for GitHub integration (e.g., issue creation)
- Auto-commit after core commands (configurable per-command with custom messages)
Commands
| Command | Description |
|---|---|
speckit.git.initialize |
Initialize a Git repository with a configurable commit message |
speckit.git.feature |
Create a feature branch with sequential or timestamp numbering |
speckit.git.validate |
Validate current branch follows feature branch naming conventions |
speckit.git.remote |
Detect Git remote URL for GitHub integration |
speckit.git.commit |
Auto-commit changes (configurable per-command enable/disable and messages) |
Hooks
| Event | Command | Optional | Description |
|---|---|---|---|
before_constitution |
speckit.git.initialize |
No | Init git repo before constitution |
before_specify |
speckit.git.feature |
No | Create feature branch before specification |
before_clarify |
speckit.git.commit |
Yes | Commit outstanding changes before clarification |
before_plan |
speckit.git.commit |
Yes | Commit outstanding changes before planning |
before_tasks |
speckit.git.commit |
Yes | Commit outstanding changes before task generation |
before_implement |
speckit.git.commit |
Yes | Commit outstanding changes before implementation |
before_checklist |
speckit.git.commit |
Yes | Commit outstanding changes before checklist |
before_analyze |
speckit.git.commit |
Yes | Commit outstanding changes before analysis |
before_taskstoissues |
speckit.git.commit |
Yes | Commit outstanding changes before issue sync |
after_constitution |
speckit.git.commit |
Yes | Auto-commit after constitution update |
after_specify |
speckit.git.commit |
Yes | Auto-commit after specification |
after_clarify |
speckit.git.commit |
Yes | Auto-commit after clarification |
after_plan |
speckit.git.commit |
Yes | Auto-commit after planning |
after_tasks |
speckit.git.commit |
Yes | Auto-commit after task generation |
after_implement |
speckit.git.commit |
Yes | Auto-commit after implementation |
after_checklist |
speckit.git.commit |
Yes | Auto-commit after checklist |
after_analyze |
speckit.git.commit |
Yes | Auto-commit after analysis |
after_taskstoissues |
speckit.git.commit |
Yes | Auto-commit after issue sync |
Configuration
Configuration is stored in .specify/extensions/git/git-config.yml:
# Branch numbering strategy: "sequential" or "timestamp"
branch_numbering: sequential
# Custom commit message for git init
init_commit_message: "[Spec Kit] Initial commit"
# Auto-commit per command (all disabled by default)
# Example: enable auto-commit after specify
auto_commit:
default: false
after_specify:
enabled: true
message: "[Spec Kit] Add specification"
Installation
# Install the bundled git extension (no network required)
specify extension add git
Disabling
# Disable the git extension (spec creation continues without branching)
specify extension disable git
# Re-enable it
specify extension enable git
Graceful Degradation
When Git is not installed or the directory is not a Git repository:
- Spec directories are still created under
specs/ - Branch creation is skipped with a warning
- Branch validation is skipped with a warning
- Remote detection returns empty results
Scripts
The extension bundles cross-platform scripts:
scripts/bash/create-new-feature-branch.sh— Bash implementation (branch creation only)scripts/bash/git-common.sh— Shared Git utilities (Bash)scripts/powershell/create-new-feature-branch.ps1— PowerShell implementation (branch creation only)scripts/powershell/git-common.ps1— Shared Git utilities (PowerShell)