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+# Claude Desktop project's instructions (in "project knowledge"):
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+# "Initialize the codemcp tool with /Users/yellowdig/personal/projects/microtables/."
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+# (use absolute path for <home> because otherwise the LLM will hallucinate a home path)
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+
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+project_prompt = '''
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+# Microtables
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+
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+## Project Overview
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+A lightweight spreadsheet application designed for quick calculations — positioned between a calculator and a full office suite. The goal is fast loading with support for common spreadsheet operations.
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+
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+## Architecture
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+
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+**Frontend** (`/frontend/`)
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+- **Language**: ClojureScript (compiled via shadow-cljs)
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+- **Framework**: Reagent + re-frame (React wrapper)
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+- **Build**: Leiningen + shadow-cljs
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+- **Dev server**: `lein dev` → localhost:8280
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+
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+**Server** (`/server/`)
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+- **Language**: JavaScript (ES6+ with Babel)
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+- **Framework**: Express
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+- **Status**: Minimal implementation - currently the frontend is fully functional standalone
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+- **Future**: Will handle persistence and collaboration
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+
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+## Key Concepts
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+
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+### Data Structure
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+The spreadsheet data is a nested map: `{column-letter {row-number {:value ...}}}`
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+
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+Example:
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+```clojure
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+{"A" {1 {:value 78 :inbound [...]}
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+ 3 {:value "=B2 * 4" :refs [...]}}
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+ "B" {2 {:value "=A1 + 3" :refs [...] :inbound [...]}}}
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+```
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+
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+### Formula System
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+- Formulae start with `=` and are evaluated using **math.js** library
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+- Range syntax supported: `=sum(A1:A10)`
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+- Cell references create a **doubly-linked tree structure**:
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+ - `:refs` - forward references (cells this formula depends on)
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+ - `:inbound` - back references (cells that depend on this cell)
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+ - `:display` - computed/evaluated value shown to user
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+ - `:value` - raw user input
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+ - `:dirty` - flag indicating re-evaluation needed
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+
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+### Evaluation Flow
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+1. When a cell changes, parse for references
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+2. Update forward (`:refs`) and back (`:inbound`) reference trees
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+3. Evaluate the cell
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+4. Recursively evaluate all cells in `:inbound` queue
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+5. Cycle detection prevents infinite loops
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+
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+## Important Files
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+
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+**Frontend Core Logic**
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+- `frontend/src/cljs/microtables_frontend/core.cljs` - App initialization
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+- `frontend/src/cljs/microtables_frontend/db.cljs` - Data model definition
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+- `frontend/src/cljs/microtables_frontend/events.cljs` - State mutations (re-frame)
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+- `frontend/src/cljs/microtables_frontend/subs.cljs` - Data queries (re-frame)
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+- `frontend/src/cljs/microtables_frontend/evaluation.cljs` - Formula evaluation engine
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+- `frontend/src/cljs/microtables_frontend/views/sheet.cljs` - Grid rendering
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+
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+**Project Configuration**
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+- `frontend/project.clj` - Leiningen config
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+- `frontend/shadow-cljs.edn` - ClojureScript build config
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+
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+## Development Notes
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+
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+- Almost everything is subject to change (architecture, structure, design)
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+- The frontend currently operates completely standalone
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+- Focus is on simplicity and performance for common use cases
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+- Data structures prioritize clarity over micro-optimization (small dataset assumption)
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+
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+## Common Tasks
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+
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+**Run frontend**: `cd frontend && lein dev`
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+**Install npm dependency**: Add to `shadow-cljs.edn`, then restart
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+**Understand formula eval**: Start in `evaluation.cljs`, trace through `evaluate-from-cell`
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+**Modify grid UI**: Look in `views/sheet.cljs`
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+'''
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+
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+[commands]
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Brandon Wong