A context-aware permission guard for Claude Code

In plain words

Nah is a permission system for Claude Code that classifies tool calls by their actual effects rather than allowing or denying entire tools. It uses a fast deterministic classifier to map commands to action types—like filesystem operations, package execution, and database writes—then applies policies to each action: allow, ask, block, or context-dependent. This lets developers permit some file deletions while blocking others, or allow git commands selectively. For ambiguous cases, it can escalate to an LLM for judgment. It's designed for developers who want granular control over AI code execution without maintaining deny lists.

written from the facts on this page · September 2026

From the sources

a guard that blocks catastrophic agent actions. Contribute to manuelschipper/nah development by creating an account on GitHub.

In the maker’s words, at launch

We needed something like --dangerously-skip-permissions that doesn’t nuke your untracked files, exfiltrate your keys, or install malware. Claude Code's permission system is allow-or-deny per tool, but that doesn’t really scale. Deleting some files is fine sometimes. And git checkout is sometimes not fine. Even when…

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