Security Guide Urges Read-Only Sandboxing Before Using AI Code-Review Graph Tools

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A developer advisory on DEV Community warns that AI-assisted code-indexing tools like code-review-graph can expose sensitive repository data if not properly sandboxed before use. The tool, which builds a persistent local map of a codebases to give AI reviewers targeted context, is MIT-licensed and supports both MCP and CLI interfaces. The core risk identified is 'authority creep,' where an agent runtime grants a context tool unintended write, shell, or filesystem permissions beyond its intended scope. The advisory recommends running the server as a dedicated OS user against a disposable, read-only repository checkout, with network egress blocked and sensitive directories like SSH configs and cloud credentials excluded from access. It also proposes a canary-file testing method to verify that the tool can access permitted files while being blocked from secrets, Git configuration, and environment variables before any live repository is connected.

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