I Built a Local Secret Scanner That Intercepts AI Coding Agents Before They Write to Disk

Description and use

StagedSec intercepts secret leaks before disk writes, integrating with pre‑commit hooks, VS Code, and AI agents.

Problem

AI coding agents can write secrets to disk before any detection, exposing sensitive data.

Outcome

StagedSec intercepts secrets at pre‑commit, editor, and AI agent stages, reducing accidental leaks. It has 70 detection rules, ~50% hit rate, and is fully local.

Workflow

• Run stagedsec scan as a pre‑commit hook to check staged changes
• Use the VS Code extension to highlight secrets while typing and receive rotation guidance
• Integrate a Claude Code hook or MCP server to inspect content inside the agent’s write loop

Evidence

Existing scanners like Gitleaks and TruffleHog are excellent tools, but they primarily catch secrets after they have already been written to disk—whether that is locally at commit time or downstream in your CI pipeline.

Source

StagedSec uses a single detection engine that intercepts secret leaks at three critical development points: Terminal, Editor, AI Agent.

Source