Initial commit: Superpowers plugin v1.0.0

Core skills library as Claude Code plugin:
- Testing skills: TDD, async testing, anti-patterns
- Debugging skills: Systematic debugging, root cause tracing
- Collaboration skills: Brainstorming, planning, code review
- Meta skills: Creating and testing skills

Features:
- SessionStart hook for context injection
- Skills-search tool for discovery
- Commands: /brainstorm, /write-plan, /execute-plan
- Data directory at ~/.superpowers/

skills/collaboration/executing-plans/SKILL.md

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+---
+name: Executing Plans
+description: Execute detailed plans in batches with review checkpoints
+when_to_use: When have a complete implementation plan to execute. When implementing in separate session from planning. When your human partner points you to a plan file to implement.
+version: 2.0.0
+---
+
+# Executing Plans
+
+## Overview
+
+Load plan, review critically, execute tasks in batches, report for review between batches.
+
+**Core principle:** Batch execution with checkpoints for architect review.
+
+**Announce at start:** "I'm using the Executing Plans skill to implement this plan."
+
+## The Process
+
+### Step 1: Load and Review Plan
+1. Read plan file
+2. Review critically - identify any questions or concerns about the plan
+3. If concerns: Raise them with your human partner before starting
+4. If no concerns: Create TodoWrite and proceed
+
+### Step 2: Execute Batch
+**Default: First 3 tasks**
+
+For each task:
+1. Mark as in_progress
+2. Follow each step exactly (plan has bite-sized steps)
+3. Run verifications as specified
+4. Mark as completed
+
+### Step 3: Report
+When batch complete:
+- Show what was implemented
+- Show verification output
+- Say: "Ready for feedback."
+
+### Step 4: Continue
+Based on feedback:
+- Apply changes if needed
+- Execute next batch
+- Repeat until complete
+
+### Step 5: Complete Development
+
+After all tasks complete and verified:
+- Announce: "I'm using the Finishing a Development Branch skill to complete this work."
+- Switch to skills/collaboration/finishing-a-development-branch
+- Follow that skill to verify tests, present options, execute choice
+
+## Remember
+- Review plan critically first
+- Follow plan steps exactly
+- Don't skip verifications
+- Reference skills when plan says to
+- Between batches: just report and wait