feat(workflow): Add workflow plugin v1.0.0

Git workflow, code quality, context management and testing commands:
- commit, push, pr, issue - git operations
- simplify, refactor, verify, check - code quality
- catchup, onboard, save, cleanup - context management
- test, format, sync - development utilities

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/workflow/commands/save.md

@@ -0,0 +1,117 @@
+---
+description: Save current progress to HANDOFF.md before /clear
+---
+
+# Save Progress
+
+## Pre-computed Context
+
+**Current Branch:**
+!`git branch --show-current`
+
+**Recent Commits:**
+!`git log --oneline -5`
+
+**Changed Files (uncommitted):**
+!`git status --porcelain | head -10`
+
+**Changed Files (in branch):**
+!`BASE=$(git remote show origin 2>/dev/null | grep "HEAD branch" | cut -d: -f2 | tr -d ' ' || echo "main"); git diff --name-only origin/$BASE...HEAD 2>/dev/null | head -10`
+
+**Existing HANDOFF.md:**
+!`cat .claude/HANDOFF.md 2>/dev/null || cat HANDOFF.md 2>/dev/null || echo "No existing HANDOFF.md"`
+
+---
+
+## Instructions
+
+You are saving the current work context to a HANDOFF.md file so the next session can continue seamlessly.
+
+### Purpose
+
+Before running `/clear` to free up context, save important information:
+- What you were working on
+- Progress made
+- Decisions and context
+- Next steps
+
+### HANDOFF.md Location
+
+Save to `.claude/HANDOFF.md` (create `.claude/` directory if needed):
+
+```bash
+mkdir -p .claude
+```
+
+### Template
+
+Create/update `.claude/HANDOFF.md` with this structure:
+
+```markdown
+# Handoff Document
+
+**Branch:** <current-branch>
+**Last Updated:** <timestamp>
+**Session Goal:** <what we were trying to accomplish>
+
+## Progress
+
+- [x] Completed task 1
+- [x] Completed task 2
+- [ ] In progress: task 3
+- [ ] Not started: task 4
+
+## Key Decisions
+
+- Decision 1: Why we chose approach A over B
+- Decision 2: Important context about the implementation
+
+## Files Modified
+
+- `path/to/file1.ts` - Added feature X
+- `path/to/file2.ts` - Fixed bug Y
+
+## Current State
+
+<Brief description of where things stand>
+<Any uncommitted work that needs attention>
+
+## Next Steps
+
+1. First thing to do
+2. Second thing to do
+3. Third thing to do
+
+## Notes
+
+<Any other important context for the next session>
+```
+
+### Content Guidelines
+
+1. **Be Specific**: Include file paths, function names, error messages
+2. **Explain Why**: Document decisions, not just what was done
+3. **List Blockers**: Note anything that prevented progress
+4. **Include Context**: Add relevant links, issue numbers, PR URLs
+
+### Workflow
+
+```
+# End of session
+/workflow:save    # Creates HANDOFF.md
+/clear            # Clears context
+
+# Next session
+/workflow:catchup # Reads HANDOFF.md + changed files
+```
+
+---
+
+## Do NOT Commit HANDOFF.md
+
+Add to `.gitignore`:
+```
+.claude/HANDOFF.md
+```
+
+HANDOFF.md is for session continuity, not for version control.