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Prempti: Guardrails and Observability for AI Coding Agents

Prempti is an open-source project that brings Falco's runtime security to AI coding agents (like Claude Code). It intercepts tool calls, evaluates them against Falco rules, and provides monitoring and enforcement to give developers visibility into agent actions and block sensitive operations.

SourceHacker News AIAuthor: jonasrosland
Prempti: Guardrails and Observability for AI Coding Agents
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Summary only

Under the source content permission, this page provides an editorial summary, key points, and a link to the original article.

Key points and analysis

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EngineersIntermediate

Key points

  • Prempti runs in userspace, intercepting coding agent tool calls before execution and issuing allow/deny/ask verdicts based on Falco rules.
  • Supports Monitor mode (log only) and Guardrails mode (enforce); modes can be switched on the fly.
  • Default ruleset covers six areas: working directory boundary, sensitive paths, sandbox disable, threats (e.g., pipe-to-shell), MCP and skill poisoning, and persistence vectors.
  • Explicit limitations: intercepts agent-declared tool calls, not syscalls; not a sandbox but a complementary policy layer at the agent level.

Highlights and analysis are generated automatically and may contain errors. Check the original source.