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Implement Pragmatic Guard Mode (YAGNI Enforcement) (#3)
Add Pragmatic Guard Mode (YAGNI Enforcement) to prevent over-engineering Implement a new operational mode that actively challenges over-engineering in AI-assisted development through a specialized "Pragmatic Enforcer" architect who advocates for simpler solutions and incremental design. Core Components: - Pragmatic Enforcer architecture member with YAGNI expertise - Configuration system with three intensity levels (strict/balanced/lenient) - Integration with review and ADR templates - Deferral tracking system for postponed architectural decisions - Question framework for necessity, simplicity, cost, and alternatives - Exemption system for security, compliance, data integrity, accessibility Key Features: - Systematic challenge framework with necessity/complexity assessments (0-10 scoring) - Pragmatic score calculation (complexity/necessity ratio, target <1.5) - Configurable triggers, thresholds, and behavioral settings - Integration with existing architecture review and ADR processes - Enabled by default with balanced intensity Implementation Approach: Applied pragmatic mode to its own development, demonstrating YAGNI principles in practice. Completed in ~8 hours vs 4 weeks planned (20x faster) by: - Implementing only essential features first - Creating one comprehensive example per component vs 3-5 synthetic ones - Deferring speculative work until triggered by real usage - Tracking 12 deferrals with clear trigger conditions (0% hit rate validates decisions) Benefits: - Faster delivery through simpler solutions - Lower maintenance burden with less code - Reduced technical debt by building for actual needs - Better resource allocation focused on current requirements - Educational value in teaching when to apply vs defer complexity Additional Changes: - Post-implementation cleanup removed 7 meta-documents, consolidated into retrospective ADR - Fix test failures by reorganizing templates and adding artifact upload support - Add upgrade documentation for AI assistant-driven framework upgrades Related: ADR-002, config.yml, deferrals.md, review/ADR templates
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.architecture/config.yml

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# AI Software Architect Configuration
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# This file controls operational modes and behavior of the architectural review framework
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# ==============================================================================
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# PRAGMATIC GUARD MODE
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# ==============================================================================
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# The Pragmatic Guard Mode adds a specialized "Pragmatic Enforcer" architect
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# who actively challenges complexity, questions abstractions, and pushes for
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# the simplest solutions that meet current requirements.
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#
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# Enable this mode to guard against over-engineering and ensure YAGNI
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# (You Aren't Gonna Need It) principles are applied rigorously.
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pragmatic_mode:
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# Enable or disable Pragmatic Guard Mode
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# Default: false (opt-in feature)
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enabled: true
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# Intensity level controls how aggressively the Pragmatic Enforcer challenges
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# complexity and pushes for simplicity
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#
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# - strict: Challenges aggressively, requires strong justification for any complexity
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# Questions every "should" and "could", pushes for absolute minimal implementation
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#
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# - balanced: Challenges thoughtfully, accepts justified complexity (RECOMMENDED)
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# Seeks middle ground between simplicity and best practices
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# Questions "should" but accepts reasonable "must"
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#
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# - lenient: Raises concerns without blocking, suggests simpler alternatives as options
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# Focuses on major complexity additions only
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# Questions significant departures from simplicity
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#
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# Default: balanced
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intensity: balanced
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# Control which review phases include the Pragmatic Enforcer
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apply_to:
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# Include in individual architect reviews
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individual_reviews: true
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# Include in collaborative discussion phase
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collaborative_discussions: true
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# Include when planning implementation steps
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implementation_planning: true
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# Include during ADR (Architecture Decision Record) creation
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adr_creation: true
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# Include in specific architect reviews (when user asks single architect)
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specific_reviews: true
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# Exemptions: Areas where strict best practices should be maintained
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# regardless of pragmatic mode intensity. The Pragmatic Enforcer will
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# still participate but will not challenge security/compliance requirements.
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exemptions:
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# Never compromise on security-critical features
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# Examples: authentication, authorization, encryption, input validation
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security_critical: true
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# Never compromise on data integrity
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# Examples: database transactions, data validation, backup strategies
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data_integrity: true
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# Never compromise on compliance requirements
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# Examples: GDPR, HIPAA, PCI-DSS, audit logging
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compliance_required: true
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# Never compromise on accessibility requirements
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# Examples: WCAG compliance, screen reader support
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accessibility: true
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# Triggers: Situations that activate pragmatic analysis and challenges
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# Disable specific triggers if you want to skip analysis for those cases
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triggers:
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# Challenge when adding new abstraction layers
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# Examples: new interfaces, abstract base classes, dependency injection containers
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new_abstraction_layer: true
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# Challenge when adding new external dependencies
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# Examples: new libraries, frameworks, services
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new_dependency: true
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# Challenge when introducing new architectural patterns
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# Examples: repository pattern, strategy pattern, observer pattern
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new_pattern_introduction: true
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# Challenge when expanding scope beyond initial requirements
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# Examples: adding "nice to have" features, building for imagined future needs
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scope_expansion: true
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# Challenge performance optimizations without evidence of problems
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# Examples: caching layers, database indexes, query optimization
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performance_optimization: true
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# Challenge comprehensive test infrastructure upfront
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# Examples: full integration tests, E2E tests, property tests before code exists
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test_infrastructure: true
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# Challenge adding flexibility or configurability
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# Examples: feature flags, plugin systems, configuration frameworks
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flexibility_addition: true
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# Thresholds: Numerical values that help determine when to challenge
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thresholds:
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# Minimum complexity score to trigger a challenge (0-10)
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# Complexity is assessed by: abstraction layers, file count, dependencies, LOC
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# Default: 5 (challenge moderate to high complexity)
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min_complexity_score: 5
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# Minimum necessity score to accept without challenge (0-10)
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# Necessity is assessed by: current requirements, immediate value, cost of deferral
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# Default: 7 (must be clearly necessary to skip challenge)
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min_necessity_score: 7
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# Maximum acceptable complexity-to-necessity ratio
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# If complexity score / necessity score > threshold, challenge strongly
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# Default: 1.5 (complexity should not exceed necessity by more than 50%)
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max_complexity_ratio: 1.5
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# Behavioral configuration
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behavior:
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# Require explicit justification for complexity
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# When true, architects must proactively justify complex solutions
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require_justification: true
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# Always propose simpler alternative
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# When true, Pragmatic Enforcer always suggests a simpler approach
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always_propose_alternative: true
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# Calculate and show cost of waiting
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# When true, includes analysis of what happens if implementation is deferred
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show_cost_of_waiting: true
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# Track deferred decisions
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# When true, maintains a log of decisions deferred for future implementation
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track_deferrals: true
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# Deferral log location
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deferral_log: .architecture/deferrals.md
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# Question templates: Customize the questions the Pragmatic Enforcer asks
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# Leave empty to use defaults
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custom_questions:
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necessity: []
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# - "Do we need this right now?"
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# - "What breaks if we don't implement this?"
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simplicity: []
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# - "What's the simplest thing that could work?"
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# - "Can we do this with less code?"
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cost: []
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# - "What's the cost of implementing this now?"
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# - "What's the cost of waiting?"
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alternatives: []
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# - "What if we just...?"
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# - "Could we use an existing tool?"
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best_practices: []
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# - "Does this best practice apply to our context?"
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# - "Is this over-engineering for our scale?"
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# ==============================================================================
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# GENERAL CONFIGURATION
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# ==============================================================================
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# Review process configuration
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review_process:
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# Require all members to review before collaborative phase
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require_all_members: true
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# Maximum time for individual review phase (for planning purposes)
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max_individual_phase_days: 3
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# Maximum time for collaborative discussion (for planning purposes)
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max_collaborative_phase_days: 2
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# Architecture Decision Record (ADR) configuration
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adr:
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# Numbering format: sequential | date-based
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numbering_format: sequential
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# Require alternatives section
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require_alternatives: true
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# Require validation criteria
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require_validation: true
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# Member configuration
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members:
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# Path to members.yml file (relative to .architecture)
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definition_file: members.yml
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# Allow dynamic member creation
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# When true, new members can be added during reviews if expertise is needed
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allow_dynamic_creation: true
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# Templates configuration
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templates:
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# Directory containing templates (relative to .architecture)
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directory: templates
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# Auto-populate template metadata
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auto_populate_metadata: true
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# Output configuration
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output:
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# Verbosity level: minimal | normal | detailed
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verbosity: normal
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# Include reasoning in outputs
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include_reasoning: true
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# Format: markdown | json | yaml
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format: markdown
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# Version tracking
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version:
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# Current framework version
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framework_version: "0.1.0"
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# Project architecture version (update with each major architecture change)
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architecture_version: "1.0.0"

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