# REVIEW — review phase

## review(all): PASS @2026-06-16T00:00Z

Adversary cold-verification of the entire accumulated build (lex + parse + eval).

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## D1 — Full cold re-verify (all prior phase DoD)

Re-ran from scratch in the work-adv clone (fresh pull, no cached state).

**Test suite:** `python -m unittest -v` → Ran 68 tests in 0.087s — **OK, 0 failures**

Subsystems verified:
- Lexer (20 tests): tokens, numbers (int/float), operators, parens, whitespace, LexError ✓
- Parser (24 tests): AST node shape, precedence, left-assoc, unary, parens, ParseError ✓
- Evaluator (24 tests): arithmetic, true division, result types (int/float coercion), CLI, EvalError ✓

**D1: PASS**

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## D2 — Full suite green

`python -m unittest -q` → `Ran 68 tests in 0.087s / OK`

**D2: PASS**

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## D3 — Cross-feature break-it

All of Builder's pre-verified table confirmed independently:

| Expression           | Expected             | Actual                            | Exit |
|----------------------|----------------------|-----------------------------------|------|
| `-(-(1+2))`          | 3 (int)              | 3 (int)                           | 0    |
| `2+3*4-5/5`          | 13 (int)             | 13 (int)                          | 0    |
| `1 @ 2`              | LexError on stderr   | Error: Unexpected character '@' at position 2 | 1 |
| `1/0`                | EvalError on stderr  | Error: Division by zero           | 1    |
| `(1+`                | ParseError on stderr | Error: Unexpected end of input    | 1    |
| `  3.14 * (2 + 1) ` | 9.42 (float)         | 9.42 (float)                      | 0    |
| `1.5 + (2.5 * 2)`   | 6.5 (float)          | 6.5 (float)                       | 0    |

Additional adversary probes (break-it attempts):

| Expression             | Expected          | Actual                 | Status |
|------------------------|-------------------|------------------------|--------|
| `6.0/2`                | 3 (int)           | 3 (int)                | PASS   |
| `(.5+.5)*4`            | 4 (int)           | 4 (int)                | PASS   |
| `-0`                   | 0 (int)           | 0 (int)                | PASS   |
| `---5`                 | -5 (int)          | -5 (int)               | PASS   |
| `1.5+1.5`              | 3 (int)           | 3 (int)                | PASS   |
| `-2*3`                 | -6 (int)          | -6 (int)               | PASS   |
| `2-1-1`                | 0 (int, L-assoc)  | 0 (int)                | PASS   |
| `8/4/2`                | 1 (int, L-assoc)  | 1 (int)                | PASS   |
| `((3+1)*2-(4/2))/3`    | 2 (int)           | 2 (int)                | PASS   |
| `1+2 3`                | ParseError        | ParseError: Unexpected token after expression | PASS |
| `1++2`                 | ParseError        | ParseError: Unexpected token 'PLUS' | PASS |
| `(1+2`                 | ParseError        | ParseError: Expected RPAREN, got 'EOF' | PASS |
| `1+2)`                 | ParseError        | ParseError: Unexpected token after expression | PASS |
| `)(` (mismatched)      | ParseError        | ParseError: Unexpected token 'RPAREN' | PASS |
| `   ` (whitespace only)| ParseError        | ParseError: Empty input | PASS |
| `""` (empty string)    | ParseError        | ParseError: Empty input | PASS |

No error leaked a bare traceback on any path. ZeroDivisionError does not escape `evaluate()`.

**D3: PASS**

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## D4 — Findings cleared

No defects found. No VETOs.

**D4: PASS**

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## Verdict

**review(all): PASS** — every DoD item from every phase (lex, parse, eval, review) verified by Adversary from cold state. No findings. No VETOs.