Cfn Error Management

---
name: cfn-error-management
description: "Error handling, batching, logging for CFN Loop. Use to capture agent errors, batch errors for processing, log structured error data, or categorize/recover from agent failures."
version: 1.0.0
tags: [mega-skill, errors, logging, batch-processing]
status: production
---

# Error Management Skill (Mega-Skill)

**Version:** 1.0.0
**Purpose:** Unified error handling, batching, and logging
**Status:** Production
**Consolidates:** cfn-standardized-error-handling, cfn-error-batching-strategy, cfn-error-logging

---

## Overview

This mega-skill provides complete error management:
- **Capture** - Standardized error capture and categorization
- **Batching** - Error grouping for batch agent processing
- **Logging** - Error log storage and retrieval

---

## Directory Structure

```
error-management/
├── SKILL.md                          # This file
├── lib/
│   ├── capture/                      # Error capture (from cfn-standardized-error-handling)
│   │   ├── capture-agent-error.sh    # Capture agent errors
│   │   └── README.md                 # Capture documentation
│   ├── batching/                     # Error batching (from cfn-error-batching-strategy)
│   │   ├── cli.sh                    # Batching CLI
│   │   ├── analyze-errors.sh         # Error analysis
│   │   ├── calculate-waves.sh        # Wave calculation
│   │   ├── cluster-files.sh          # File clustering
│   │   ├── create-batches.sh         # Batch creation
│   │   ├── templates/                # Batch templates
│   │   └── README.md                 # Batching documentation
│   └── logging/                      # Error logging (from cfn-error-logging)
│       ├── invoke-error-logging.sh   # Log errors
│       ├── cleanup-error-logs.sh     # Log cleanup
│       ├── src/                      # TypeScript implementation
│       └── README.md                 # Logging documentation
└── cli/                              # CLI wrappers
    ├── capture-error.sh              # → lib/capture/capture-agent-error.sh
    ├── batch-errors.sh               # → lib/batching/cli.sh
    └── log-error.sh                  # → lib/logging/invoke-error-logging.sh
```

---

## Quick Start

### 1. Capture an Error

```bash
./cli/capture-error.sh \
  --agent-id "agent-123" \
  --error-type "TIMEOUT" \
  --message "Agent timed out after 900s" \
  --context "Loop 3 implementation"
```

### 2. Batch Errors for Processing

```bash
./cli/batch-errors.sh \
  --input errors.json \
  --max-batch-size 5 \
  --output batches.json
```

### 3. Log an Error

```bash
./cli/log-error.sh \
  --task-id "task-123" \
  --agent-id "agent-123" \
  --error-type "VALIDATION" \
  --message "Output validation failed"
```

---

## Module Details

### Capture Module (lib/capture/)

**Purpose:** Standardized error capture and categorization

**Error Types:**
- TIMEOUT - Agent execution timeout
- CRASH - Agent process crash
- VALIDATION - Output validation failure
- COORDINATION - Redis coordination failure (CLI mode only; task-mode default has no Redis)
- UNKNOWN - Uncategorized errors

**Features:**
- Standardized error format
- Category-based recovery strategies
- Context preservation

### Batching Module (lib/batching/)

**Purpose:** Group errors for batch agent processing

**Features:**
- Error clustering by file
- Wave calculation for parallel processing
- Tier-based batching (small/medium/large)
- Template-based batch configuration

### Logging Module (lib/logging/)

**Purpose:** Error log storage and management

**Features:**
- Structured error logging
- Log cleanup and rotation
- Integration with CLI and Docker modes
- TypeScript implementation

---

## Integration with CFN Loop

```bash
# 1. Capture error when agent fails
./cli/capture-error.sh \
  --agent-id "$AGENT_ID" \
  --error-type "TIMEOUT" \
  --message "$ERROR_MESSAGE"

# 2. Log the error
./cli/log-error.sh \
  --task-id "$TASK_ID" \
  --agent-id "$AGENT_ID" \
  --error-type "TIMEOUT"

# 3. Batch multiple errors for batch processing
./cli/batch-errors.sh --input collected-errors.json
```

---

## Migration from Individual Skills

### Old Paths → New Paths

| Old Path | New Path |
|----------|----------|
| `.claude/skills/cfn-standardized-error-handling/capture-agent-error.sh` | `.claude/skills/cfn-error-management/lib/capture/capture-agent-error.sh` |
| `.claude/skills/cfn-error-batching-strategy/cli.sh` | `.claude/skills/cfn-error-management/lib/batching/cli.sh` |
| `.claude/skills/cfn-error-logging/invoke-error-logging.sh` | `.claude/skills/cfn-error-management/lib/logging/invoke-error-logging.sh` |

---

## Version History

### 1.0.0 (2025-12-02) - Mega-Skill Creation
- Merged: cfn-standardized-error-handling, cfn-error-batching-strategy, cfn-error-logging
- Added: CLI wrappers
- Added: Unified documentation

---

## Dependencies

- **Bash:** 4.0+
- **jq:** JSON processing
- **Node.js:** TypeScript logging (optional)