---
phase: 03-vault
verified: 2026-02-26T19:15:13Z
status: passed
score: 5/5 must-haves verified
---

# Phase 3: Vault Workflow Verification Report

**Phase Goal:** Developers can anonymize PII in a prompt, pass redacted text to an LLM, and restore originals from the response — all without a second server call
**Verified:** 2026-02-26T19:15:13Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | `guard.deanonymize(text)` replaces all known placeholder tokens with original values from the session vault | VERIFIED | Lines 209-244 of guard.py; runtime check confirmed `"Email: [EMAIL_ADDRESS-A1B2], Phone: [PHONE_NUMBER-C3D4]"` → `"Email: john@example.com, Phone: 555-0123"` |
| 2 | Multiple `scan_input()` calls accumulate placeholders into the same vault (`vault.update`, not `vault.replace`) | VERIFIED | Line 154: `self._vault.update(result.placeholders)` in `_scan()`; runtime check confirmed two sequential `_vault.update()` calls produce `len(vault) == 2` |
| 3 | `guard.clear_cache()` empties the vault so no prior placeholders remain | VERIFIED | Line 252: `self._vault.clear()`; runtime check confirmed `len(vault) == 0` after call |
| 4 | `guard.scan_output(text, scanners)` sends the same `/api/security/scan` request as `scan_input` and accumulates placeholders | VERIFIED | Line 207: `return self._scan(text, scanners)` — identical delegation as scan_input (line 184); scan_output docstring at line 188 states same endpoint; no NotImplementedError anywhere in file |
| 5 | `deanonymize` logs a debug-level message when the vault is empty or when no placeholders are found in the provided text | VERIFIED | Lines 228-230 (empty vault path) and lines 241-243 (no-match path); runtime capture of both debug messages confirmed |

**Score:** 5/5 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/meshulash_guard/guard.py` | Complete vault workflow: `_scan()`, `scan_output()`, `deanonymize` with debug logging | VERIFIED | 252 lines; all methods present; no stub patterns in implementation code |
| `src/meshulash_guard/guard.py` | Module-level logger via `logging.getLogger(__name__)` | VERIFIED | Line 14: `import logging`; line 22: `logger = logging.getLogger(__name__)` |

**Artifact level detail:**

- **Level 1 (Exists):** `src/meshulash_guard/guard.py` — EXISTS, 252 lines
- **Level 2 (Substantive):** 252 lines (well above minimum); zero stub patterns (TODO/FIXME/placeholder in implementation code — all 22 grep hits are docstring text or variable names); exports `Guard` class with all required methods
- **Level 3 (Wired):** `Guard` is the primary SDK entry point; verified importable via `from meshulash_guard import Guard`

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `Guard.scan_input()` | `Guard._scan()` | delegation | WIRED | Line 184: `return self._scan(text, scanners)` |
| `Guard.scan_output()` | `Guard._scan()` | delegation | WIRED | Line 207: `return self._scan(text, scanners)` |
| `Guard._scan()` | `self._vault` | vault accumulation | WIRED | Line 154: `self._vault.update(result.placeholders)` |
| `Guard.deanonymize()` | `logger` | debug warning on empty vault and no-match | WIRED | Lines 228-230 (empty vault) and 241-243 (no-match); both debug paths confirmed firing at runtime |

### Requirements Coverage

| Requirement | Status | Notes |
|-------------|--------|-------|
| VAULT-01 (deanonymize restores originals client-side) | SATISFIED | `deanonymize()` uses `self._vault` (in-process dict); zero server calls; exact-match replacement with longest-first ordering |
| VAULT-02 (vault accumulates across multiple scan_input calls) | SATISFIED | `_scan()` uses `self._vault.update()` (accumulate, not replace); runtime confirmed 2 sequential updates → 2 vault entries |
| VAULT-03 (clear_cache resets session) | SATISFIED | `clear_cache()` calls `self._vault.clear()`; runtime confirmed vault is empty after call |

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| — | — | — | — | No anti-patterns found |

All 22 grep hits for stub-adjacent words (`placeholder`, `not implemented`, etc.) are legitimate: docstring prose, variable names, or log message strings. No implementation code is stubbed.

### Human Verification Required

None. All goal truths are verifiable programmatically for this phase:

- Vault accumulation, deanonymize, and clear_cache are pure in-process Python — fully testable without a live server
- Debug logging was verified by capturing log records at runtime
- The phase goal explicitly states "all without a second server call" — confirmed by inspecting `deanonymize()` (no HTTP call present)

### Gaps Summary

No gaps. All five observable truths are verified by both static code inspection and runtime execution.

---

## Verification Evidence

### Static checks

```
guard.py:14   import logging
guard.py:22   logger = logging.getLogger(__name__)
guard.py:94   def _scan(self, text: str, scanners: list) -> ScanResult:
guard.py:154  self._vault.update(result.placeholders)
guard.py:157  def scan_input(self, text: str, scanners: list) -> ScanResult:
guard.py:184      return self._scan(text, scanners)
guard.py:186  def scan_output(self, text: str, scanners: list) -> ScanResult:
guard.py:207      return self._scan(text, scanners)
guard.py:209  def deanonymize(self, text: str) -> str:
guard.py:228      logger.debug("deanonymize called but vault is empty -- no placeholders to restore")
guard.py:241      logger.debug("deanonymize found no known placeholders in the provided text")
guard.py:246  def clear_cache(self) -> None:
guard.py:252      self._vault.clear()
```

No `NotImplementedError` found anywhere in guard.py.

### Runtime checks (all passed)

```
ALL 8 CHECKS PASSED
  - Vault accumulates: 2 sequential updates → len(vault) == 2
  - deanonymize replaces all known placeholders in one pass
  - Repeated placeholders in same text all replaced
  - clear_cache: len(vault) == 0 after call
  - deanonymize on empty vault returns text unchanged
  - deanonymize with no matching placeholders returns text unchanged
  - scan_output signature: (self, text, scanners) — matches scan_input
  - _scan exists and is referenced in scan_output source

DEBUG LOGGING CHECKS PASSED
  - [DEBUG] deanonymize called but vault is empty -- no placeholders to restore
  - [DEBUG] deanonymize found no known placeholders in the provided text
```

---

_Verified: 2026-02-26T19:15:13Z_
_Verifier: Claude (gsd-verifier)_
