Architecture To Implementation Mapper

All generated tasks must retain a reference to their source ADR.

2. Deconstruct the C4 Diagrams

Analyze the C4 diagrams to identify concrete units of work.

• Provisioning Tasks:
  Create explicit tasks for provisioning or configuring each container and backing service (compute, database, cache, queue, object storage).

• Connectivity & Routing:
  Generate tasks for every interaction between containers (network rules, service discovery, load balancers, client SDKs).

• Contract Definition:
  For each data flow, create tasks to define and version contracts (OpenAPI, AsyncAPI, Protobuf), including backward-compatibility rules.

Each task must reference the relevant C4 container and relationship.

3. Extract Constraints from ADRs

Translate architectural decisions into enforceable implementation constraints.

• Scaffolding Tasks:
  If an ADR specifies languages, frameworks, or runtime standards, create explicit scaffolding tasks (project structure, base libraries, build tooling).

• Quality Gates:
  Map ADR requirements (security, testing, performance, observability) into:

  • Reusable checklists
  • Definition-of-Done criteria
  • CI/CD enforcement rules

These constraints apply consistently across all containers and modules.

4. Sequence the Implementation Roadmap (Hybrid Model)

Organize work using a hybrid execution strategy to minimize risk and maximize early feedback.

Phase 1: Foundation (Horizontal)

Establish shared, system-wide prerequisites.

• Infrastructure provisioning
• CI/CD pipelines with build gates, testing gates & artifact versioning
• Identity, secrets, and configuration management
• Observability baseline (logs, metrics, traces)
• Shared libraries and platform services

This phase enables all downstream work and is completed once.

Phase 2: Skeleton / Thin Thread (Horizontal)

Validate system connectivity with minimal logic.

• Deploy minimal versions of all containers
• Establish authentication and authorization paths
• Implement contract stubs
• Verify end-to-end request flow with placeholder logic

The goal is architectural validation, not feature completeness.

Phase 3: Vertical Module Execution (Iterative)

Divide the total system into module-by-module vertical slices.

For each module or feature slice:

• Implement core business logic
• Fully implement its public contracts
• Write unit tests for domain logic
• Write integration tests against real dependencies
• Run module-scoped benchmarks on known hot paths
• Enforce ADR-derived quality gates locally

Modules are prioritized by:

• Low dependency fan-in
• High architectural or technical risk
• High business value

Each module exits this phase in a production-grade, independently verifiable state.

Plans for each vertical slide should be written down to a separated .md file.

Phase 4: System-Level Hardening (Horizontal, Final)

Focus on emergent system behavior rather than individual correctness.

• End-to-end workflow testing across modules
• Stress and load testing with realistic traffic
• Cross-module hot path benchmarking
• Failure mode validation (timeouts, retries, backpressure)
• Operational readiness checks (alerts, dashboards, SLOs)

This phase assumes modules are already hardened in isolation.

5. Maintain Traceability

For every generated task:

• Reference the originating ADR(s)
• Reference the relevant C4 container and relationship
• Identify whether the task belongs to:
  • Foundation
  • Skeleton
  • A specific module slice
  • System-level hardening

This ensures that architectural changes can be traced directly to impacted implementation work and vice versa.

Refer to the C4 Model Guidelines for naming and modeling consistency.