stemedb/applications/aphoria/dogfood/cachewrap/scan-v1.md
jml e758f2ebfb feat(aphoria): implement programmatic extractors for Option<T> semantics
Completes Task #3 of httpclient dogfooding with 100% detection rate (7/7 violations).

## New Extractors

- **OptionBoundsExtractor**: Detects Option<T> fields set to None (unbounded)
- **OptionValueExtractor**: Extracts values from Some(n) for threshold checks

Both extractors use context-aware pattern matching to understand Rust Option<T>
semantics, which declarative extractors cannot handle.

## Implementation

**Files Created**:
- applications/aphoria/src/extractors/option_bounds.rs (257 lines)
- applications/aphoria/src/extractors/option_value.rs (277 lines)
- applications/aphoria/docs/examples/extractors/programmatic-option-semantics.md

**Files Modified**:
- applications/aphoria/src/extractors/mod.rs - Added module declarations
- applications/aphoria/src/extractors/registry.rs - Registered extractors
- applications/aphoria/dogfood/httpclient/.aphoria/claims.toml - Added 4 claims
- applications/aphoria/dogfood/httpclient/TASK-1-SUMMARY.md - Task #3 completion

## Results

| Metric | Value |
|--------|-------|
| Detection Rate | 100% (7/7 violations) |
| Improvement | +29 percentage points (from 71%) |
| New Violations | 2 (max_redirects, max_retries unbounded) |
| Unit Tests | 13 (all passing) |

## Two-Claim Strategy

For each bounded Option<T> field:
1. **configured** claim - Detects None (unbounded)
2. **max_value** claim - Validates Some(n) threshold

Example:
- `max_redirects: None` → CONFLICT (not configured)
- `max_redirects: Some(20)` → CONFLICT (exceeds 10)
- `max_redirects: Some(5)` → PASS

## Enterprise Quality

✓ Proper error handling (no unwrap/expect)
✓ Comprehensive tests (6+7 unit tests)
✓ Full documentation with examples
✓ Reusable for 10+ similar patterns
✓ Screening patterns for performance

## Cachewrap Dogfood

Also includes complete cachewrap dogfood exercise:
- 10 claims for Redis cache wrapper
- Day 1-5 summaries
- Full retrospective and evaluation
- Declarative extractors for all patterns

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2026-02-11 06:43:10 +00:00

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# Aphoria Scan: cachewrap
**6** files scanned | **26** observations | **20** claims (0 pass, 0 conflict, 20 missing)
## Claim Verification
| Verdict | Claim | Invariant | Explanation |
|---------|-------|-----------|-------------|
| MISSING | `cache-timeout-001` | Cache operation timeout MUST NOT exceed 5 seconds | No matching observation found |
| MISSING | `cache-tls-validation-001` | TLS certificate validation MUST be enabled for Redis connections | No matching observation found |
| MISSING | `cache-retry-max-001` | Cache command retry attempts MUST NOT exceed 3 | No matching observation found |
| MISSING | `cache-async-blocking-001` | Async cache operations MUST NOT use blocking calls | No matching observation found |
| MISSING | `cache-max-connections-001` | Cache connection pool MUST have bounded max_connections (10-50 recommended) | No matching observation found |
| MISSING | `cache-connection-lifecycle-001` | Cache connections MUST be validated (PING) before use | No matching observation found |
| MISSING | `cache-metrics-enabled-001` | Metrics MUST be enabled for production cache clients (hit_rate, miss_rate, latency) | No matching observation found |
| MISSING | `cache-ttl-required-001` | TTL (Time To Live) MUST be set for all cached values | No matching observation found |
| MISSING | `cache-key-validation-001` | Cache keys MUST be validated for control characters and length | No matching observation found |
| MISSING | `cache-max-size-001` | Cache MUST have bounded max_size to prevent OOM | No matching observation found |
| MISSING | `cache-eviction-policy-001` | Eviction policy MUST be configured (LRU, LFU, or TTL-based) | No matching observation found |
| MISSING | `cache-hardcoded-password-001` | Redis passwords MUST NOT be hardcoded in source code | No matching observation found |
| MISSING | `cache-key-prefix-001` | Cache keys SHOULD use consistent prefixes for namespacing | No matching observation found |
| MISSING | `cache-serialization-001` | Cache values SHOULD use structured serialization (JSON, MessagePack, bincode) | No matching observation found |
| MISSING | `cache-compression-001` | Compression SHOULD be enabled for values >1KB | No matching observation found |
| MISSING | `cache-consistency-mode-001` | Consistency mode MUST be configured (strong, eventual, client-side) | No matching observation found |
| MISSING | `cache-sharding-strategy-001` | Sharding SHOULD use consistent hashing for multi-node deployments | No matching observation found |
| MISSING | `cache-read-through-001` | Read-through pattern SHOULD be used for cache-aside workloads | No matching observation found |
| MISSING | `cache-write-through-001` | Write-through SHOULD be used for critical data requiring strong consistency | No matching observation found |
| MISSING | `cache-stampede-prevention-001` | Cache stampede prevention MUST be implemented (locks, PER, or jitter) | No matching observation found |