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/catchup.md

@@ -0,0 +1,64 @@
+---
+description: Read all changed files in current branch to rebuild context after /clear
+---
+
+# Catchup - Context Recovery
+
+## Pre-computed Context
+
+**Current Branch:**
+!`git branch --show-current`
+
+**Base Branch:**
+!`git remote show origin 2>/dev/null | grep "HEAD branch" | cut -d: -f2 | tr -d ' ' || echo "main"`
+
+**Commits Since Branch:**
+!`BASE=$(git remote show origin 2>/dev/null | grep "HEAD branch" | cut -d: -f2 | tr -d ' ' || echo "main"); git log --oneline origin/$BASE...HEAD 2>/dev/null || git log --oneline $BASE...HEAD 2>/dev/null | head -15`
+
+**Changed Files:**
+!`BASE=$(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 || git diff --name-only $BASE...HEAD 2>/dev/null`
+
+**Recent Activity (staged + unstaged):**
+!`git status --porcelain | head -10`
+
+**HANDOFF.md (if exists):**
+!`cat .claude/HANDOFF.md 2>/dev/null || cat HANDOFF.md 2>/dev/null || echo "No HANDOFF.md found"`
+
+---
+
+## Instructions
+
+You are rebuilding context after a `/clear` command. Your goal is to understand what work has been done on this branch.
+
+### 1. Review Commits
+Summarize the commits shown above - what feature/fix is being worked on?
+
+### 2. Read Changed Files
+Read each changed file to understand the current state of the implementation:
+- Use the Read tool for each file in the "Changed Files" list
+- Pay attention to new functions, modified logic, and TODOs
+
+### 3. Check HANDOFF.md
+If a HANDOFF.md exists, it contains notes from the previous session about:
+- Current goal and progress
+- Key decisions made
+- Next steps to continue
+
+### 4. Summarize Context
+Provide a brief summary:
+- **Goal**: What is being implemented/fixed
+- **Progress**: What's done so far
+- **Current State**: Any uncommitted changes
+- **Next Steps**: What should be done next
+
+---
+
+## Usage
+
+After running `/clear` to free up context:
+
+```
+/workflow:catchup
+```
+
+This reads all modified files and reconstructs the context so you can continue working seamlessly.