Show HN: Deedglass – An agent said it updated 1 row; Postgres changed 301

Category: security

Tags: ai-agents, database-safety, audit-log, postgres, mcp, fhir

Score: 7.5/10 (Innovation: 7, Technical: 8, Documentation: 8, Utility: 7)

Deedglass is a verification and safety layer that sits between AI agents and the systems they mutate, comparing what an agent claims it changed against what actually changed (e.g., via Postgres logical decoding), then sealing signed, offline-verifiable records and supporting undo after human countersign. It targets a real gap—agents silently causing wide-impact writes—with a well-structured Claimed/Checked/Proven model, policy gating, and healthcare/FHIR support.

Target audience: backend developers, security engineers, devops, health-tech teams

Repository: https://github.com/deedglass/deedglass · Go · Apache-2.0 · 2 stars

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