2.0 KiB
2.0 KiB
Phase 1
Purpose
Phase 1 defines the technical decision-making framework that must be completed before implementation begins. This phase is about making and documenting core technical choices in a clear order so future work follows shared decisions rather than assumptions.
Scope
Phase 1 establishes how technical and architectural decisions will be recorded, reviewed, and used to guide later implementation tasks.
In Scope
- defining the major technical decisions required before implementation
- documenting architecture decisions in a durable repository-owned form
- establishing the relationship between architecture overview documents and ADRs
- clarifying the minimum decision set required before implementation starts
Out of Scope
Until the phase-1 decision framework is complete, do not:
- start application implementation
- introduce runtime services
- choose implementation details that depend on unresolved architecture decisions
- expand into feature delivery work
- treat undocumented assumptions as approved decisions
Expected Outputs
Phase 1 should produce:
- a maintained phase-1 decision plan
- a documented technical decision process
- a central architecture overview document
- a set of ADRs covering major technical choices
- clear implementation preconditions for the next phase
Decision Order
Make decisions in this order:
- Define the required decision areas.
- Record the technical decision process and evaluation criteria.
- Record the ADR process and naming conventions.
- Establish the architecture overview and its relationship to ADRs.
- Document major technical decisions in ADRs.
- Confirm that implementation-critical choices are explicit and aligned.
Exit Criteria for Phase 1
Phase 1 is complete when:
- the decision framework is documented
- the technical decision process is documented and usable
- the architecture overview exists and points to ADRs
- required major technical decisions are recorded as ADRs
- implementation can begin without relying on undocumented assumptions