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