---
name: source_discovery
phase: source_discover
description: Guidance for discovering, auditing, and documenting the existing pre-emptive source environment before target migration.
---

# Phase 0a: Existing Source Environment Discovery Skill

When auditing and discovering an existing pre-emptive source environment:

1. **Assess As-Is Architecture**: Analyze existing workloads, on-premises applications, legacy infrastructure, or existing cloud provider setups.
2. **Identify Existing Components**:
   - Monolithic / legacy application services & ingress endpoints.
   - Self-hosted database engines (e.g. MySQL, PostgreSQL, Oracle) or legacy file shares.
   - Traditional messaging queues (e.g. RabbitMQ, ActiveMQ).
   - Network topology, firewall rules, and authentication mechanisms.
3. **Capture Source Metrics & Pain Points**:
   - Current scale, capacity constraints, downtime risks, and operational bottlenecks.
   - Security vulnerabilities, compliance gaps, and maintenance costs.
4. **Document Source Architecture**:
   - Produce a clear `docs/source-architecture.md` baseline documenting the "Before" state.
   - Render a Mermaid diagram representing the existing source topology (`source-architecture.mmd`).