7bafcc3eef
Plugin assemblies loaded via PluginHost into isolated AssemblyLoadContexts produce distinct types even from the same DLL. When AppDomain.GetAssemblies() returns both Default and plugin-ALC copies, DI registration and IOptions<T> resolution silently fail (e.g. ValkeyTransportOptions defaulting to localhost). Applied AssemblyLoadContext.Default filter to all 7 assembly discovery sites: - MessagingServiceCollectionExtensions (transport plugin scan) - StellaRouterIntegrationHelper (transport plugin loader) - Gateway.WebService Program.cs (startup transport scan) - GeneratedEndpointDiscoveryProvider (endpoint provider scan) - ReflectionEndpointDiscoveryProvider (endpoint attribute scan) - ServiceCollectionExtensions (schema provider scan) - MigrationModulePluginDiscovery (migration plugin scan) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
66 lines
3.2 KiB
Markdown
66 lines
3.2 KiB
Markdown
# Advisory Lens Architecture
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> **Status: Production (Shared Library).** AdvisoryLens is a standalone deterministic library at `src/__Libraries/StellaOps.AdvisoryLens/`, **not** merged into AdvisoryAI. The two modules serve different purposes: AdvisoryLens provides pattern-based case matching without AI inference; AdvisoryAI provides LLM-powered advisory analysis with guardrails. They can be composed together but are architecturally independent. The library is currently available for integration but not yet referenced from any WebService `Program.cs`.
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## Purpose
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StellaOps.AdvisoryLens is a deterministic, offline-first library for semantic case matching of vulnerability advisories. It produces ranked suggestions and contextual hints without AI/LLM inference.
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## Scope
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- Working directory: `src/__Libraries/StellaOps.AdvisoryLens/`
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- Tests: `src/__Libraries/__Tests/StellaOps.AdvisoryLens.Tests/`
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- Integration entry point: `services.AddAdvisoryLens(...)`
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## Models
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| Type | Purpose |
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|------|---------|
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| `AdvisoryCase` | Advisory input including CVE, PURL, severity, and metadata |
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| `LensContext` | Evaluation envelope (advisory case, tenant id, evidence refs, optional timestamp) |
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| `CasePattern` | Matching rule with severity/ecosystem/CVE conditions and default suggestion payload |
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| `LensSuggestion` | Ranked operator-facing recommendation with confidence and action |
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| `LensHint` | Contextual evidence hint grouped by deterministic categories |
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| `LensResult` | Evaluation output containing suggestions, hints, matched pattern ids, timestamp, and input hash |
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## Matching Algorithm
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1. `CaseMatcher` evaluates each `CasePattern` against the input `AdvisoryCase`
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2. Scoring factors are severity range match, PURL ecosystem match, and CVE pattern match
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3. Disqualifying mismatches (severity out of range, wrong ecosystem) return score `0.0`
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4. If no factors are configured for a pattern, score defaults to `0.5`
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5. Positive-score matches are sorted by score descending, then `PatternId` ascending for deterministic tie-breaking
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6. `AdvisoryLensService` maps sorted matches into suggestions with rank = position + 1
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## Hint Generation
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Hints are derived from `LensContext` and sorted by category ordinal then text:
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- Severity: `High` or `Critical` advisories emit a priority remediation hint
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- Reachability: non-empty reachability evidence emits code-path guidance
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- VEX: non-empty VEX references emit a count-based hint
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- Policy: non-empty policy traces emit a count-based hint
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## Integration
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```csharp
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services.AddAdvisoryLens(patterns, timeProvider);
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```
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- Registers `IAdvisoryLensService` as a singleton
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- Uses empty patterns when none are provided
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- Uses `TimeProvider.System` when no provider is injected
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## Determinism Guarantees
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- Stable ordering for matches and hints
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- Input hash computed as `sha256:` + SHA-256 over canonical JSON (`camelCase`, no indentation, nulls ignored)
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- Timestamp comes from `LensContext.EvaluationTimestampUtc` or injected `TimeProvider`
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- Identical inputs and clock source produce identical `LensResult`
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## Offline Posture
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- No network dependencies in library behavior
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- In-process, side-effect-free evaluation and scoring
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- Tests validate execution with no HTTP or external service setup
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