Credibility Engine

Credibility Engine

Institutional-scale credibility scoring and claim lifecycle management. The Credibility Engine evaluates claims, detects drift, manages snapshots, and computes composite credibility indexes across decision episodes.

Source: src/credibility_engine/

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Core Components

Module	Purpose
scoring.py	Composite credibility index (0–100) from 6 weighted dimensions
claims.py	Claim lifecycle — create, support, challenge, decay, retire
drift_events.py	Structured drift detection with fingerprint dedup
snapshots.py	Point-in-time credibility snapshots for audit trail
correlation.py	Cross-claim correlation clusters
sync_plane.py	Multi-node credibility synchronization

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Credibility Index

The credibility index is a composite score computed from six dimensions:

Dimension	Weight	What It Measures
Evidence Strength	25%	Quality and quantity of supporting evidence
Temporal Freshness	20%	How recent the supporting data is
Source Diversity	15%	Number of independent corroborating sources
Contradiction Score	15%	Inverse of contradicting evidence
Consensus Level	15%	Agreement across claim supporters
Decay Factor	10%	Time-based confidence degradation

Grade mapping: A >= 85, B >= 75, C >= 65, D < 65

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Claim Lifecycle

  Created → Supported → Challenged → Resolved
                ↓             ↓
            Decayed       Retired

• Created — new claim with initial evidence
• Supported — additional evidence increases confidence
• Challenged — contradicting evidence reduces confidence
• Decayed — TTL expired, needs refresh
• Resolved — contradiction addressed
• Retired — claim withdrawn or superseded

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Drift → Patch → Seal Loop

1. Drift detected — claim falls below threshold or contradicts canon
2. Patch proposed — corrective action with rationale
3. Seal applied — patch committed, new snapshot created
4. Memory updated — Memory Graph records the correction

See Drift → Patch for the full lifecycle.

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Related Pages

• Coherence Ops Mapping — DLR/RS/DS/MG governance artifacts
• Unified Atomic Claims — Claim primitive
• Canon — Blessed claim memory
• Drift → Patch — Drift detection and remediation

Full documentation: docs/credibility-engine/