# Project Status

**Version:** 0.1.0

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## Metrics

| Metric | Count |
|--------|-------|
| Rust source code | 30,284 lines |
| Test code | 7,872 lines |
| Example `.geolog` files | 2,346 lines |
| Example files | 30 |
| Rust source files | 84 |
| Unit tests | 137 (all passing) |
| Integration tests | 31 (all passing) |

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## What's Complete

- Parser, lexer, syntax support
- Type system and elaboration
- Chase algorithm with equality saturation
- Tensor algebra for axiom checking
- SMT-style model enumeration
- Persistence and version control
- Interactive REPL
- Comprehensive test suite

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## Mostly Complete

- Parameterized theories
- Nested instances (parsing done, elaboration partial)
- Query optimization
- Relational algebra compilation
- Congruence closure integration

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## Known Gaps

### TODOs in Code

| Location | Description |
|----------|-------------|
| `src/repl.rs:84` | Store full theory_type in GeologMeta |
| `src/overlay.rs:380` | Copy functions (deferred) |
| `src/store/query.rs:61` | Columnar batch loading |
| `src/store/instance.rs` | External references, product domains |
| `src/query/to_relalg.rs` | Column path navigation, ScanRelationOp |

### Incomplete Features

- Product types in conclusions don't fully work
- Existentials over product sorts unsupported
- Field projections in equations don't compile
- Disjunction fires both branches (correct but inefficient)
- Tensor compilation failures are silent

### In Progress

- Lean4 formalization of monotonic submodel proofs
- Homoiconic query plan representation
- Disjunction variable alignment for tensor builder

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## Test Coverage

| File | Coverage Area |
|------|---------------|
| `tests/unit_elaborate.rs` | Type checking (14 tests) |
| `tests/unit_chase.rs` | Chase algorithm |
| `tests/unit_parsing.rs` | Parser (4 tests) |
| `tests/examples_integration.rs` | 31 integration tests |
| `tests/proptest_*.rs` | 11 property-based test suites |

Fuzzing targets exist in `fuzz/` directory.