Privacy-safe context receipts for AI coding agents: prove what context, memory, tools, skills, compactions, and security findings crossed the boundary without logging raw content.

Context Fabric is an MCP server that automatically captures project state on every git commit, detects when stored context has drifted from codebase reality, and delivers structured, token-budgeted briefings to AI agents — without requiring any developer action.

Empirical validation of the Specificity Erosion signal from DriftAlert. Pre-registered (OSF pkr84). Companion to The Nature of Agentic Drift (Rayman, Prakash, Haraldsdottir, 2026).