Developer builds escrow layer for AI agent tool calls, documents failures openly

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A developer built an open-source layer called gx (TraceFold, Apache-2.0) that intercepts and escrows every effect an AI agent produces before it executes, allowing actions to be blocked or fully reversed. The system was tested on September 1, 2026, against a real OpenClaw agent runtime using its before_tool_call plugin hook, with the full escrow-admit-commit-undo loop verified end to end. The author candidly discloses the limits of the work, noting they reviewed less than 0.1 percent of OpenClaw's source code and found no confirmed real-world use of the plugin hook by other developers. Several failures during testing are documented in detail, including a filename-versus-identifier mismatch, a misunderstood offline flag, and an incorrectly shaped plugin hook matcher that only surfaced when installed against a live gateway. The post frames these failures as evidence of how the system actually works, rather than omitting them in favor of a cleaner narrative.

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