feat(claude/commands): add commit and branch cleanup commands

Bring in three slash commands from the official claude-plugins repo
to streamline common git workflows directly from Claude.

- clean-gone-branches: remove local branches deleted on remote
- commit-push-pr: commit, push, and open a PR in one step
- commit: create a git commit from current changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

claude/commands/clean-gone-branches.md

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+---
+description: Cleans up all git branches marked as [gone] (branches that have been deleted on the remote but still exist locally), including removing associated worktrees.
+source: https://github.com/anthropics/claude-plugins-official/blob/main/plugins/commit-commands/commands/clean_gone.md
+---
+
+## Your Task
+
+You need to execute the following bash commands to clean up stale local branches that have been deleted from the remote repository.
+
+## Commands to Execute
+
+1. **First, list branches to identify any with [gone] status**
+   Execute this command:
+   ```bash
+   git branch -v
+   ```
+
+   Note: Branches with a '+' prefix have associated worktrees and must have their worktrees removed before deletion.
+
+2. **Next, identify worktrees that need to be removed for [gone] branches**
+   Execute this command:
+   ```bash
+   git worktree list
+   ```
+
+3. **Finally, remove worktrees and delete [gone] branches (handles both regular and worktree branches)**
+   Execute this command:
+   ```bash
+   # Process all [gone] branches, removing '+' prefix if present
+   git branch -v | grep '\[gone\]' | sed 's/^[+* ]//' | awk '{print $1}' | while read branch; do
+     echo "Processing branch: $branch"
+     # Find and remove worktree if it exists
+     worktree=$(git worktree list | grep "\\[$branch\\]" | awk '{print $1}')
+     if [ ! -z "$worktree" ] && [ "$worktree" != "$(git rev-parse --show-toplevel)" ]; then
+       echo "  Removing worktree: $worktree"
+       git worktree remove --force "$worktree"
+     fi
+     # Delete the branch
+     echo "  Deleting branch: $branch"
+     git branch -D "$branch"
+   done
+   ```
+
+## Expected Behavior
+
+After executing these commands, you will:
+
+- See a list of all local branches with their status
+- Identify and remove any worktrees associated with [gone] branches
+- Delete all branches marked as [gone]
+- Provide feedback on which worktrees and branches were removed
+
+If no branches are marked as [gone], report that no cleanup was needed.

claude/commands/commit-push-pr.md

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+---
+allowed-tools: Bash(git checkout --branch:*), Bash(git branch:*), Bash(git add:*), Bash(git status:*), Bash(git push:*), Bash(git commit:*), Bash(gh pr create:*)
+description: Commit, push, and open a PR, rename branch appropriately if needed
+source: https://github.com/anthropics/claude-plugins-official/blob/main/plugins/commit-commands/commands/commit-push-pr.md
+---
+
+## Context
+
+- Current git status: !`git status`
+- Current git diff (staged and unstaged changes): !`git diff HEAD`
+- Current branch: !`git branch --show-current`
+
+## Your task
+
+Based on the above changes:
+
+1. Create a new branch if on main. If already on a non-main branch,
+   check if the branch name looks randomly generated (e.g. UUIDs,
+   hex strings, meaningless character sequences, or 1-3 random
+   unrelated words like "brave-fox" or "purple-mountain") rather than
+   descriptive of the changes. If so, rename it to something that
+   aligns with the changes using `git branch -m <new-name>`.
+2. Create a single commit with an appropriate message
+3. Push the branch to origin
+4. Create a pull request using `gh pr create`
+5. You have the capability to call multiple tools in a single response. You MUST do all of the above in a single message. Do not use any other tools or do anything else. Do not send any other text or messages besides these tool calls.

claude/commands/commit.md

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+---
+allowed-tools: Bash(git add:*), Bash(git status:*), Bash(git commit:*)
+description: Create a git commit
+source: https://github.com/anthropics/claude-plugins-official/blob/main/plugins/commit-commands/commands/commit.md
+---
+
+## Context
+
+- Current git status: !`git status`
+- Current git diff (staged and unstaged changes): !`git diff HEAD`
+- Current branch: !`git branch --show-current`
+- Recent commits: !`git log --oneline -10`
+
+## Your task
+
+Based on the above changes, create a single git commit.
+
+You have the capability to call multiple tools in a single response. Stage and create the commit using a single message. Do not use any other tools or do anything else. Do not send any other text or messages besides these tool calls.