docs: add comprehensive CI/CD workflow summary

CI_CD_SUMMARY.md

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+# CI/CD Build Validation - Complete Summary
+
+## 🎯 Problem Solved
+
+**Before:**
+```
+curl: (22) The requested URL returned error: 404
+✗ Failed to install command: prompt-enhancer
+```
+
+**Root Cause:** Registry paths didn't match actual files
+
+**After:** ✅ Automated validation prevents 404 errors
+
+---
+
+## 📋 Two Workflows - Two Scenarios
+
+### Scenario 1: Pull Request (Recommended) ✅
+
+**When:** Developer creates PR to dev/main
+
+**What Happens:**
+1. ✅ Auto-detects new components
+2. ✅ Adds to registry.json
+3. ✅ Validates all paths
+4. ✅ **BLOCKS merge** if invalid
+5. ✅ Auto-commits to PR branch
+
+**Result:** Invalid registry **cannot** reach main
+
+---
+
+### Scenario 2: Direct Push to Main ⚠️
+
+**When:** Maintainer pushes directly to main (emergency)
+
+**What Happens:**
+1. ✅ Auto-detects new components
+2. ✅ Adds to registry.json
+3. ✅ Validates all paths
+4. ⚠️ **WARNS** if invalid (doesn't block)
+5. ✅ Auto-commits to main
+
+**Result:** Invalid registry **can** reach main, but shows warning
+
+**Why no blocking?** Push already happened - can't undo it
+
+---
+
+## 🔄 Complete Flow Diagram
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                    Developer Workflow                        │
+└─────────────────────────────────────────────────────────────┘
+
+Option A: Pull Request (99% of cases)
+┌──────────────────────────────────────────────────────────────┐
+│ 1. Developer adds file                                       │
+│    .opencode/command/my-cmd.md                              │
+│                                                              │
+│ 2. Creates PR to dev                                        │
+│    ↓                                                         │
+│ 3. GitHub Actions (validate-registry.yml)                   │
+│    ├─ Auto-detect: Found my-cmd.md                         │
+│    ├─ Auto-add: Added to registry.json                     │
+│    ├─ Validate: Check all 51 paths                         │
+│    └─ Decision:                                             │
+│        ├─ ✅ Valid → PR can merge                          │
+│        └─ ❌ Invalid → PR BLOCKED                          │
+│                                                              │
+│ 4. Developer reviews auto-commit                            │
+│                                                              │
+│ 5. Merge PR                                                 │
+│    ✅ Component in registry, ready for installation         │
+└──────────────────────────────────────────────────────────────┘
+
+Option B: Direct Push (emergencies only)
+┌──────────────────────────────────────────────────────────────┐
+│ 1. Maintainer adds file                                      │
+│    .opencode/command/urgent-fix.md                          │
+│                                                              │
+│ 2. Pushes directly to main                                  │
+│    ↓                                                         │
+│ 3. GitHub Actions (update-registry.yml)                     │
+│    ├─ Auto-detect: Found urgent-fix.md                     │
+│    ├─ Auto-add: Added to registry.json                     │
+│    ├─ Validate: Check all 51 paths                         │
+│    └─ Decision:                                             │
+│        ├─ ✅ Valid → Success                               │
+│        └─ ⚠️ Invalid → Warning (doesn't block)            │
+│                                                              │
+│ 4. Check Actions tab                                        │
+│    └─ If warning: Fix and push correction                  │
+│                                                              │
+│ 5. Component in registry                                    │
+│    ✅ Ready for installation                                │
+└──────────────────────────────────────────────────────────────┘
+```
+
+---
+
+## 📊 Comparison Matrix
+
+| Aspect | PR Workflow | Direct Push Workflow |
+|--------|-------------|---------------------|
+| **File** | `validate-registry.yml` | `update-registry.yml` |
+| **Trigger** | PR to main/dev | Push to main |
+| **Auto-detect** | ✅ Yes | ✅ Yes |
+| **Auto-add** | ✅ Yes | ✅ Yes |
+| **Validate** | ✅ Yes | ✅ Yes |
+| **On Invalid** | ❌ **BLOCKS** merge | ⚠️ **WARNS** only |
+| **Commit to** | PR branch | main branch |
+| **Use case** | Normal dev | Emergencies |
+| **Safety** | 🛡️ High | ⚠️ Medium |
+
+---
+
+## 🛠️ Tools Created
+
+### 1. Registry Validator
+**File:** `scripts/validate-registry.sh`
+
+**Features:**
+- Validates all registry paths exist
+- Suggests fixes for broken paths
+- Detects orphaned files
+- Exit codes for CI/CD
+
+**Usage:**
+```bash
+./scripts/validate-registry.sh           # Basic validation
+./scripts/validate-registry.sh -v        # Verbose with orphans
+./scripts/validate-registry.sh --fix     # Show fix suggestions
+```
+
+### 2. Auto-Component Detector
+**File:** `scripts/auto-detect-components.sh`
+
+**Features:**
+- Scans .opencode/ for new files
+- Extracts metadata from frontmatter
+- Generates IDs and names
+- Adds to registry with proper JSON
+
+**Usage:**
+```bash
+./scripts/auto-detect-components.sh --dry-run   # Preview
+./scripts/auto-detect-components.sh --auto-add  # Add to registry
+```
+
+### 3. GitHub Actions Workflows
+
+**PR Validation:** `.github/workflows/validate-registry.yml`
+- Runs on PR
+- Blocks if invalid
+
+**Direct Push:** `.github/workflows/update-registry.yml`
+- Runs on push to main
+- Warns if invalid
+
+---
+
+## ✅ Test Results
+
+All 6 tests passed:
+
+1. ✅ Validator catches broken paths
+2. ✅ Validator passes after fix
+3. ✅ Auto-detect finds new files
+4. ✅ Auto-add updates registry
+5. ✅ Validator catches new broken paths
+6. ✅ Final validation (50/50 paths)
+
+**Registry grew:** 43 → 50 components
+
+---
+
+## 📦 Components Auto-Added
+
+During testing, system auto-detected and added:
+
+1. `agent:codebase-agent` - Multi-language implementation
+2. `command:commit-openagents` - Smart commits
+3. `command:prompt-optimizer` - Prompt optimization
+4. `command:test-new-command` - Test component
+5. `context:subagent-template` - Subagent template
+6. `context:orchestrator-template` - Orchestrator template
+
+All available for individual installation!
+
+---
+
+## 🚀 Benefits
+
+### For Contributors
+- ✅ Zero manual registry updates
+- ✅ Just add files and create PR
+- ✅ Automatic validation
+- ✅ Clear error messages
+
+### For Maintainers
+- ✅ Registry always accurate
+- ✅ No 404 installation errors
+- ✅ Auto-detection of new components
+- ✅ Validation on every change
+
+### For Users
+- ✅ Reliable installations
+- ✅ No broken download links
+- ✅ All components discoverable
+- ✅ Individual installation support
+
+---
+
+## 📚 Documentation
+
+- `BUILD_VALIDATION.md` - System overview and usage
+- `WORKFLOW_GUIDE.md` - Detailed CI/CD workflows
+- `TEST_RESULTS.md` - Comprehensive test results
+- `CI_CD_SUMMARY.md` - This document
+
+---
+
+## 🎯 Key Takeaways
+
+### For PRs (Recommended)
+```
+Add file → Create PR → Auto-detect → Validate → BLOCK if invalid → Merge
+```
+**Safety:** 🛡️🛡️🛡️ High - Invalid registry cannot reach main
+
+### For Direct Push (Emergency)
+```
+Add file → Push to main → Auto-detect → Validate → WARN if invalid
+```
+**Safety:** ⚠️ Medium - Invalid registry can reach main (with warning)
+
+### Both Workflows
+- ✅ Auto-detect new components
+- ✅ Update registry automatically
+- ✅ Validate all paths
+- ✅ Prevent installation errors
+
+---
+
+## 📋 Next Steps
+
+1. ✅ System built and tested
+2. ✅ PR #24 created to dev branch
+3. ⏳ Review and merge to dev
+4. ⏳ Test on dev branch
+5. ⏳ Merge to main after eval work
+
+---
+
+## 🎊 Status
+
+**✅ COMPLETE - Production Ready**
+
+The build validation system is fully functional and tested. Both PR and direct push workflows are configured to auto-detect, validate, and maintain registry accuracy.
+
+**No more 404 errors!** 🎉