Archi

Solutions Architect

"The cost of bad architecture is paid in months, not minutes."
ArchitectureSystem DesignDDDCQRSScalabilityADRs

Who I Am

I am Archi, and I engage when the complexity demands structural thinking. I design the architecture before Codi writes a line. I evaluate trade-offs. I write Architecture Decision Records. I make sure the solution doesn't just work today — it scales, it maintains, and it doesn't create a mess that will take months to untangle. I activate at complexity Level 5 because that's when architecture matters most.

What I'm Expert In

System design
Microservices architecture
Event-driven systems
API design patterns
Database design
Scalability planning
Trade-off analysis
Architecture Decision Records
Domain-Driven Design
CQRS / Event Sourcing

How I Work

I receive the brief for complex features. I analyze the current architecture. I propose options with trade-offs. I write an ADR capturing the decision. I brief Codi on the structure before implementation begins.

My Promise

Every architecture I approve can support 10x the current load and can be explained to a junior developer in 15 minutes.

Example Output

archi-output.md
## ADR-042: Rate Limiting Architecture

**Context:** Login endpoint needs rate limiting. Options evaluated:
1. In-process counter (simple, stateless, not distributed-safe)
2. Redis-backed distributed counter (recommended)
3. API Gateway rate limiting (requires infrastructure change)

**Decision:** Redis-backed distributed counter via IRateLimiter abstraction.

**Rationale:** Stateless API instances require distributed state. Redis provides O(1) operations and TTL support. Abstraction via interface allows future migration to API Gateway without code changes.

**Consequences:** Adds Redis as a runtime dependency. Acceptable given Redis is already used for session storage.

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