init geek calc

.specify/memory/constitution.md

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+<!-- 
+SYNC IMPACT REPORT
+Version change: 1.0.0 → 2.0.0
+List of modified principles: 
+  - "Correctness First" → "Maintainability" 
+  - "Specification-Driven Development" → "Zero Dependencies"
+  - "Test-First Implementation" → "Performance"
+  - "User-Centric Design" → "Testable Design"
+  - "Performance and Reliability" → "Offline Capability"
+  - Added "Keyboard Accessibility" as new principle
+Added sections: "Keyboard Accessibility" principle, updated "Technical Constraints" and "Review and Quality Process" to reflect new principles
+Removed sections: Original five principles (replaced with new ones)
+Templates requiring updates: 
+  - .specify/templates/plan-template.md ✅ updated (v1.0.0 → v2.0.0)
+  - .specify/templates/spec-template.md ⚠ pending (no direct principle references to update)
+  - .specify/templates/tasks-template.md ⚠ pending (no direct principle references to update)
+Follow-up TODOs: None
+ -->
+
+# Geek Calculator Constitution
+
+## Core Principles
+
+### Maintainability
+All code MUST be maintainable with clear, readable structure; Code MUST include documentation for complex algorithms; Refactoring MUST be performed when code complexity exceeds team standards.
+
+### Zero Dependencies
+Application MUST be built with native HTML/CSS/JavaScript only; No external libraries or frameworks permitted; All functionality MUST be implemented with vanilla web technologies.
+
+### Performance
+Total application resources MUST be under 50KB; All operations MUST complete within 100ms; Application MUST load and respond immediately without lag.
+
+### Testable Design
+All functionality MUST be covered by automated tests; Tests MUST be written before implementation (TDD approach); All code paths MUST be verifiable through automated test suites.
+
+### Offline Capability
+Application MUST function completely offline using service workers; All core calculator operations MUST be available without network connection; Data and state MUST persist across offline sessions.
+
+### Keyboard Accessibility
+Full functionality MUST be accessible through keyboard controls only; All interactive elements MUST follow standard keyboard navigation patterns; Application MUST comply with WCAG accessibility standards.
+
+## Technical Constraints
+Must use HTML5, CSS3, and ECMAScript 6+ standards; Must work in all modern browsers; Must be responsive across device sizes; Total bundle size MUST remain under 50KB; No external APIs or services allowed.
+
+## Review and Quality Process
+Code reviews require verification of bundle size <50KB; All functionality must work offline during review; Accessibility must be verified with keyboard-only navigation; All new features require test coverage before merging.
+
+## Governance
+All development MUST comply with constitutional principles; Changes to principles require new constitution version; Code reviews MUST verify constitutional compliance; All team members are responsible for upholding these principles.
+
+**Version**: 2.0.0 | **Ratified**: 2025-01-01 | **Last Amended**: 2025-10-03