Need to know: How Webflow keeps secrets out of agent context

ctxcop is an open-source MIT-licensed CLI tool designed to prevent AI coding agents from receiving sensitive credentials when they inspect environment variables, files, prompts, tool outputs, or MCP interactions. Developed after an agent exposed a live AWS token through a routine `printenv` command, it applies a need-to-know principle by replacing detected secrets with informative placeholders while allowing commands to execute normally on the user’s machine. The tool supports multiple agent environments, including Claude Code, Cursor, Codex, and Aider, and uses the Betterleaks detection engine with configurable rules for organization-specific data, optional crypto, and financial PII patterns. It also informs agents about redactions so they can continue working without attempting to recover hidden values. ctxcop is intended as a context-level safeguard rather than a firewall, egress proxy, or defense against threats such as SSRF, malicious MCP tools, or multi-step exfiltration, which require complementary network-level controls.

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