feat(memory): implement TrajectoryRiskAccumulator and ImplicitConflictDetector

CHANGELOG.md

@@ -14,6 +14,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - `zeph-subagent`: `FleetRegistry` trait and `SqliteFleetRegistry` adapter; sub-agents spawned by
   `SubAgentManager` are now registered in the fleet `agent_sessions` table and visible in the fleet
   dashboard. `cancel_all` marks all active sub-agent sessions as cancelled on shutdown (closes #4370).
+- `zeph-memory`: `TrajectoryRiskAccumulator` — exponential-decay risk scoring over tool-call
+  signals (policy violation, prompt injection, tool-chain anomaly, confidence drop) with
+  configurable half-life and escalation threshold. Raises `ToolError::TrajectoryRiskExceeded`
+  when the clamped score exceeds the configured limit. Resolves #4372.
+- `zeph-memory`: `ImplicitConflictDetector` — write-time fuzzy predicate similarity detection
+  for APEX-MEM graph edges using normalised Levenshtein distance. Detected pairs are staged in
+  the new `implicit_conflict_candidates` table (migration 090) and annotated on SYNAPSE recall
+  via `annotate_conflicts`. Resolves #4373.
+- `zeph-db`: migration `090_implicit_conflict_candidates.sql` — staging table for implicit
+  conflict candidate pairs with status/resolution lifecycle columns and three supporting indexes.
+- `zeph-config`: `ImplicitConflictConfig` and supporting types (`SimilarityMethod`,
+  `ConflictResolutionStrategy`, `ConsolidationDaemonConfig`) under `[memory.graph.implicit_conflict]`.
 
 ## [0.21.2] - 2026-05-18
 

crates/zeph-config/src/lib.rs

@@ -138,13 +138,16 @@ pub use logging::{LogRotation, LoggingConfig};
 pub use mcp_security::{CapabilityClass, DataSensitivity, FlaggedParameter, ToolSecurityMeta};
 pub use memory::{
     AdmissionConfig, AdmissionStrategy, AdmissionWeights, AutoDreamConfig, BeliefRevisionConfig,
-    CategoryConfig, CompressionConfig, CompressionStrategy, ContextFormat, ContextStrategy,
-    DigestConfig, DocumentConfig, EmGraphConfig, ForgettingConfig, GraphConfig, HebbianConfig,
+    CategoryConfig, CompressionConfig, CompressionStrategy, ConflictResolutionStrategy,
+    ConsolidationDaemonConfig, ContextFormat, ContextStrategy, DigestConfig, DocumentConfig,
+    EmGraphConfig, ForgettingConfig, GraphConfig, HebbianConfig, ImplicitConflictConfig,
     MagicDocsConfig, MemCotConfig, MemoryConfig, MicrocompactConfig, NoteLinkingConfig,
     OpticalForgettingConfig, PersonaConfig, PruningStrategy, ReasoningConfig, RecallViewConfig,
     RetrievalConfig, RetrievalFailuresConfig, RpeConfig, SemanticConfig, SessionsConfig,
-    SidequestConfig, StoreRoutingConfig, StoreRoutingStrategy, TierConfig, TieredRetrievalConfig,
-    TrajectoryConfig, TreeConfig, TypedPagesConfig, TypedPagesEnforcement, VectorBackend,
+    SidequestConfig, SimilarityMethod, StoreRoutingConfig, StoreRoutingStrategy, TierConfig,
+    TieredRetrievalConfig, TrajectoryConfig, TrajectoryRiskAccumulatorConfig,
+    TrajectorySeverityMultipliers, TrajectorySignalWeights, TreeConfig, TypedPagesConfig,
+    TypedPagesEnforcement, VectorBackend,
 };
 pub use metrics::MetricsConfig;
 pub use notifications::NotificationsConfig;