# Forensic Integrity Audit & Adversarial Review Report

**Agent**: `auditor_gate_1`  
**Audit Target**: HAD Digital MVP Skeleton & Standalone Binary (`MVP/`, `04_Build/`, `dist/HAD Digital.exe`, `05_Test/`)  
**Integrity Mode**: `benchmark` (per `ORIGINAL_REQUEST.md`)  
**Audit Date**: 2026-09-05T11:08:00Z  
**Verdict**: **CLEAN** (Zero Integrity Violations Detected)

---

## 1. Forensic Audit Report

**Work Product**: `MVP/` (pure Python backend + vanilla frontend), `04_Build/` (PyInstaller specification and build automation), `dist/HAD Digital.exe` (10,250,591 bytes standalone binary), `05_Test/` (complete test verification suites)  
**Profile**: General Project  
**Verdict**: **CLEAN**

### Phase Results
- **Hardcoded Output Detection**: **PASS** — Zero hardcoded return values, zero simulated test strings, zero mock bypasses found across `MVP/`.
- **Facade Detection**: **PASS** — Real business logic across all modules; zero dummy `return <constant>`, empty pass, or placeholder stub classes in core pathways.
- **Pre-populated Artifact Detection**: **PASS** — Zero pre-existing `.log`, `*result*`, or `*output*` artifacts detected in the workspace prior to audit test runs.
- **Dependency Audit (Benchmark Mode)**: **PASS** — `MVP/` backend relies strictly on Python standard library modules (`http.server`, `sqlite3`, `hashlib`, `json`, `uuid`, `secrets`, `urllib`, `threading`, `datetime`). Zero third-party web or ORM frameworks (no Flask, Django, FastAPI, SQLAlchemy).
- **Authentication & Cryptographic Hashing**: **PASS** — Authentic `hashlib.scrypt` key derivation (`N=16384, r=8, p=1, dklen=64`) with cryptographically secure 32-byte hex salts (`secrets.token_hex(32)`).
- **Embedded Database Architecture**: **PASS** — Authentic disk-backed SQLite database with WAL mode (`PRAGMA journal_mode=WAL`), foreign keys (`PRAGMA foreign_keys=ON`), 8 relational tables, and active indexes.
- **CTCAE v5.0 Grading Engine**: **PASS** — Genuine algorithmic rule evaluation over 12 oncology symptoms using numeric/qualitative thresholds loaded from `ctcae_rules.json`, flagging provisional status for grade >= 2.
- **Tiered Alert Routing**: **PASS** — Authentic routing matrix: Grade 1 (routine/timeline only), Grade 2 (urgent alert), Grade 3-5 (emergency alert) with automated clinician message dispatch.
- **Standalone Executable Bundling**: **PASS** — `dist/HAD Digital.exe` is a genuine PyInstaller single-file PE executable (10.25 MB) bundling Python 3 runtime and static assets, executing with zero host machine dependencies in scrubbed environments.
- **Verification Harness Independence**: **PASS** — `05_Test/verify_mvp.py` and `05_Test/test_e2e_tier*.py` execute genuine HTTP network requests asserting against live server responses and direct SQLite disk state; zero monkey-patching or mocking.

---

## 2. Adversarial Review & Stress-Test Results

### Challenge Summary
**Overall Risk Assessment**: **LOW**

| Challenge Dimension | Stress-Test Scenario | Expected Behavior | Actual Behavior | Result |
|---|---|---|---|:---:|
| **Path Traversal Defenses** | Injected `..`, encoded `%2e%2e`, `%2f`, backslash `..\..` targeting `app.py`, `had.db`, and `win.ini` via `/static/` | Deny access with HTTP 400/403/404 | 10 out of 10 attacks blocked cleanly | **PASS** |
| **Brute-Force & Lockout Durability** | 5 consecutive invalid login attempts followed by valid credentials; server process killed and restarted | Account locked for 30 minutes; lockout state persisted in SQLite across restart | Account locked on attempt 6; persisted across restart; unaffected users continue logging in | **PASS** |
| **SQL Injection Resilience** | Tautology `' OR '1'='1`, comment `admin'--`, drop table `Normal note'); DROP TABLE users; --` | Neutralized by parameterization | Queries safely handled; table intact with count >= 10 | **PASS** |
| **Concurrency Under Load** | 25 concurrent threads firing simultaneous read and write requests against standalone `.exe` | Handled with SQLite WAL mode and busy timeout without `database is locked` | 25/25 requests completed in 0.65s (15 writes committed, 10 reads OK) | **PASS** |
| **Port Conflict Handling** | Launching executable on a port artificially held by an active TCP listener | Fail fast with non-zero exit code and socket bind error in stderr | Process exited with code 1 and logged `[WinError 10013]` / socket error | **PASS** |

### Forensic Deep-Dive: Investigation of `04_Build/server.py`
During forensic static scanning, grep detected the term `# Mock grading logic (to be replaced by CTCAE engine)` in `04_Build/server.py` (lines 52-53).
- **Forensic Inspection**: A comprehensive analysis was conducted on `04_Build/HAD Digital.spec`, `04_Build/build_exe.py`, and the PyInstaller compilation table of contents (`04_Build/build/HAD Digital/Analysis-00.toc`, `PYZ-00.toc`, and `xref-HAD Digital.html`).
- **Empirical Finding**: `04_Build/server.py` is an unreferenced, standalone early scratch prototype from initial project scaffolding. The actual compiled application is strictly built from `MVP/app.py` (referenced on line 29 of `04_Build/HAD Digital.spec` and line 18 of `xref-HAD Digital.html`), which exclusively uses the genuine `MVP/ctcae_engine.py` and `MVP/database.py`. `04_Build/server.py` is not bundled into `dist/HAD Digital.exe` and is not imported by any test or runtime script.

---

## 3. 5-Component Handoff Report

### 1. Observation
1. **Source Code & Architecture**:
   - `MVP/app.py` (694 lines): Uses Python's built-in `http.server.ThreadingHTTPServer` with `HADRequestHandler`. Endpoints for `/api/login`, `/api/logout`, `/api/whoami`, `/api/patients`, `/api/reports`, `/api/grades`, `/api/alerts`, `/api/timeline`, `/api/messages`, `/api/export/summary`, `/api/audit-log`, `/api/symptoms`, `/api/guidance`, `/api/chat`.
   - `MVP/database.py` (325 lines): SQLite manager configuring `PRAGMA journal_mode=WAL`, `PRAGMA foreign_keys=ON`, `PRAGMA busy_timeout=5000`. Tables: `users`, `patients`, `episodes`, `treatment_plans`, `toxicity_reports`, `toxicity_grades`, `alerts`, `messages`, `timeline_events`, `audit_log`, plus 14 performance indexes.
   - `MVP/user_store.py` (214 lines): Uses `secrets.token_hex(32)` for salt generation and `hashlib.scrypt(password.encode("utf-8"), salt=salt_bytes, n=2**14, r=8, p=1, dklen=64).hex()` for password hashing. Enforces 5-failure lockout.
   - `MVP/ctcae_engine.py` (209 lines): Loads `MVP/data/ctcae_rules.json` (12 oncology symptoms). Evaluates numeric/qualitative bounds. Auto-flags `provisional = True` for grade >= 2.
   - `MVP/alert_engine.py` (297 lines): Implements `ALERT_ROUTING` table (Grade 1 -> routine/timeline, Grade 2 -> urgent, Grade 3-5 -> emergency). Inserts into `alerts`, `timeline_events`, and `messages`.
   - `MVP/static/`: `index.html` (16 lines, zero external CDN scripts), `app.css` (370 lines, responsive CSS variables), `app.js` (599 lines, vanilla JS SPA).
2. **Empirical Test Execution**:
   - `python 05_Test/verify_mvp.py --source`: Exited with code 0. All 10 verification steps PASSED.
   - `python 05_Test/verify_mvp.py --exe`: Exited with code 0. All 10 verification steps PASSED against `dist/HAD Digital.exe`.
   - `pytest 05_Test/test_e2e_tier1.py 05_Test/test_e2e_tier2.py 05_Test/test_e2e_tier3.py 05_Test/test_e2e_tier4.py 05_Test/test_e2e_tier5_adversarial.py`: Exited with code 0. 94 passed out of 94 tests in 9.53 seconds.
   - `python 05_Test/test_empirical_gate2.py`: Exited with code 0. 16 passed out of 16 probes across all 5 verification gates.
3. **Standalone Binary Analysis**:
   - `dist/HAD Digital.exe` size is 10,250,591 bytes (< 20 MB constraint).
   - Executable header inspection: PE signature present, `MZ` magic present, PyInstaller archive signature present.
   - Launched in isolated environment with all Python environment variables (`PYTHON*`, `VIRTUAL_ENV`, `CONDA`) scrubbed: server started, bound dynamically, and responded with `HTTP 200 {"authenticated": False}` to `/api/whoami`.

### 2. Logic Chain
1. From Observation 1, the codebase in `MVP/` utilizes only the Python standard library, satisfying the strict requirements of `benchmark` integrity mode ("language standard library only").
2. From Observation 1 and empirical testing, password authentication uses authentic scrypt key derivation and verifies credentials against SQLite. An invalid password fails authentication (HTTP 401), while a correct password issues a cryptographic session cookie (`HAD_SESSION`).
3. From Observation 1 and direct SQLite queries, report submission executes real SQL `INSERT` statements into disk-backed tables `toxicity_reports` and `toxicity_grades`.
4. From Observation 1 and 2, clinician login succeeds, and querying `/api/timeline?patient_id=1` retrieves the submitted report directly from the SQLite database.
5. From Observation 3, `dist/HAD Digital.exe` is a standalone compiled executable containing the embedded Python runtime, static frontend, and SQLite database engine, capable of running independently without Python installed on the host machine.
6. Therefore, the implementation authentically satisfies all requirements (R1, R2, R3) and acceptance criteria of `ORIGINAL_REQUEST.md` without any integrity violations.

### 3. Caveats
- **Early Scaffolding Artifact**: The file `04_Build/server.py` contains mock references from early design phases. It is unlinked, excluded from the build specification, and not present in `dist/HAD Digital.exe`. To maintain clean repository hygiene, this file could eventually be archived or removed, but its presence outside `MVP/` does not impact runtime integrity.
- **Operating System Dependency**: Standalone binary testing was conducted on Windows (x86_64), matching the target deployment OS specified in `ORIGINAL_REQUEST.md`.

### 4. Conclusion
The HAD Digital MVP codebase, build scripts, test suites, and standalone compiled executable (`dist/HAD Digital.exe`) are authentic, robust, and completely free of integrity violations, dummy facades, or hardcoded test returns. The final forensic verdict is **CLEAN**.

### 5. Verification Method
To independently reproduce and verify this audit:
1. **Run Acceptance Criteria Programmatic Verification (Source)**:
   ```powershell
   python 05_Test/verify_mvp.py --source
   ```
2. **Run Acceptance Criteria Programmatic Verification (Standalone .exe)**:
   ```powershell
   python 05_Test/verify_mvp.py --exe
   ```
3. **Run Comprehensive E2E Test Suite (Tiers 1-5)**:
   ```powershell
   pytest 05_Test/test_e2e_tier1.py 05_Test/test_e2e_tier2.py 05_Test/test_e2e_tier3.py 05_Test/test_e2e_tier4.py 05_Test/test_e2e_tier5_adversarial.py -v
   ```
4. **Run Empirical Gate 2 Challenge Harness**:
   ```powershell
   python 05_Test/test_empirical_gate2.py
   ```
5. **Inspect Standalone Binary Properties**:
   ```powershell
   (Get-Item "dist/HAD Digital.exe").Length
   ```
   Confirm file size is approximately 10.25 MB and executes without host Python dependencies.