AutomataSim

App.tsx Modularization Refactor

• Refactored large UI sections out of src/App.tsx into focused components:
  • src/components/AppHero.tsx
  • src/components/AutomatonEditorPanel.tsx
  • src/components/AutomatonVisualizationPanel.tsx
• Updated src/App.tsx to act as an orchestration layer for state + handlers while delegating render blocks to the new components.
• Added shared handler helpers in src/App.tsx to reduce repeated per-automaton update logic:
  • updateSelectedUiState
  • handleSimulationInputChange
  • handlePreviousStep
  • handleNextStep
  • handlePauseAutoPlay
• Consolidated simulation panel props into a single simulationPanelProps object passed to the visualization component.
• Switched App declaration to React.FC typing for consistency with the extracted components.
• Added functionality to other Automata types and made the sim work properly

DFA Simulation UI Integration

• Connected parsed Deterministic Finite Automaton definitions to simulateDFA in src/App.tsx.
• Added simulation input controls (input string + Run).
• Added simulation result output:
  • Accept/Reject status
  • final state
  • simulation/validation errors (when present)
• Added related simulation styles in src/App.css.
• Updated TODO to mark immediate Step 5 complete.

TODO Clarification

• Added explicit Simulation UI task: Allow simulating step by step.
• Next immediate implementation target: TODO Step 6 (interactive step runner).

Validation Runs

• pnpm lint passed
• pnpm test passed

2026-03-02

Project Setup and Foundation

• Initialized project foundation tasks from TODO Section 1.
• Replaced starter Vite/React counter UI with an AutomataSim shell.
• Added base project documentation and local/deploy instructions in README.md.
• Created base source structure:
  • src/components/
  • src/lib/
  • src/types/

CI / Deployment Fix

• Investigated GitHub Actions failure at actions/setup-node@v4 with pnpm cache.
• Root cause: pnpm-workspace.yaml existed without a required packages field.
• Fix applied:
  • Added:
    • packages:
    • - .
• Verified command success locally:
  • pnpm store path --silent
  • pnpm install --frozen-lockfile

Scope and Terminology

• Completed TODO Section 2 (MVP scope definition).
• Set MVP automaton scope to Deterministic Finite Automaton only.
• Standardized wording to use full automata names instead of acronyms in TODO/app text.

Text-Based Automaton Input + Rendering

• Switched approach from field-by-field editor to text-based automaton definition input.
• Added new types in src/types/automaton.ts.
• Added parser/validator in src/lib/parseAutomaton.ts:
  • Parses states, alphabet, start, accept, and transitions.
  • Validates missing sections, invalid references, duplicates, and transition format.
• Rebuilt UI in src/App.tsx:
  • Textarea input for definition.
  • Live parse error output.
  • SVG rendering of states and transitions.
  • Start arrow and accepting-state double-circle rendering.
• Added supporting styles in src/App.css.

Validation Runs

• pnpm install passed
• pnpm dev started successfully
• pnpm lint passed
• pnpm build passed

Next Planned Work

• Implement Deterministic Finite Automaton simulation engine (simulateDFA).
• Add input string execution (accept/reject + step trace).