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partly or unimplemented features - now implemented

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2026-02-09 08:53:51 +02:00
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docs/features/unchecked/reachgraph/8-state-reachability-lattice.md Normal file
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# 8-State Reachability Lattice
## Module
ReachGraph
## Status
IMPLEMENTED
## Description
Reachability infrastructure exists with triage integration, but the full 8-state lattice model (U/SR/SU/RO/RU/CR/CU/X) with mathematical state transitions as described is not fully implemented as a distinct subsystem.
## What's Implemented
- **LatticeState enum**: `src/__Libraries/StellaOps.Reachability.Core/LatticeState.cs` -- full 8-state model defined: Unknown (U), StaticReachable (SR), StaticUnreachable (SU), RuntimeObserved (RO), RuntimeUnobserved (RU), ConfirmedReachable (CR), ConfirmedUnreachable (CU), Contested (X); includes VEX mapping and confidence ranges per state
- **ReachabilityLattice state machine**: `src/__Libraries/StellaOps.Reachability.Core/ReachabilityLattice.cs` -- `FrozenDictionary` transition table with evidence accumulation; transitions from all states including conflict detection (X state when static and runtime evidence contradict); confidence delta per transition
- **ConfidenceCalculator**: `src/__Libraries/StellaOps.Reachability.Core/ConfidenceCalculator.cs` -- confidence score computation
- **IReachabilityIndex**: `src/__Libraries/StellaOps.Reachability.Core/IReachabilityIndex.cs` -- `QueryHybridAsync` returns `HybridReachabilityResult` with lattice state
- **HybridReachabilityResult**: `src/__Libraries/StellaOps.Reachability.Core/HybridReachabilityResult.cs` -- includes lattice state, confidence, and VEX recommendation
## What's Missing
- The lattice state machine is implemented as a library but not fully integrated as a distinct subsystem with its own API surface for triage workflows
- Triage-specific UI for lattice state visualization and manual state overrides
- Lattice state persistence and audit trail for state transitions
## Implementation Plan
- Expose lattice state transitions as an API for triage integration
- Build UI for lattice state visualization and manual overrides
- Add persistence layer for state transition history and audit trail
## Related Documentation
- Source: See feature catalog