Claude Code removes the dedicated file search tool, switches to Bash, and disrupts permission-tiered approval.

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ME News, April 23 (UTC+8), according to Dongcha Beating monitoring, Claude Code removed the dedicated Grep (text search) and Glob (filename matching) tools starting from version 2.1.117, changing all file operations to be executed via Bash.
Bash is a general-purpose command-line tool that can do far more than just search files, including high-risk operations such as deleting, modifying, and installing software.
Anthropic engineer Adam Wolff said the change is faster, "It took four months to remove these tools; subtracting is much harder than adding."
Amp Code CEO Quinn Slack pointed out that this change breaks the existing permission management logic.
Previously, users could set permissions by tool type: read-only tools like Grep and Glob were automatically allowed, while Bash commands required individual manual approval.
Now all operations go through Bash, making this tiered approval system ineffective: users either approve each shell command individually (very inefficient) or allow all (losing security control).
Slack believes this exposes a more fundamental problem: using deterministic rules to manage agent permissions is not feasible. Models will use various equivalent expressions to bypass classification, such as using bash(grep query | head -n 10) instead of a dedicated search tool, or inline calls to sed, perl, python to execute arbitrary operations. He said the Amp team tried to automatically parse Bash commands to determine safety, "It can reduce about half of the approvals, but the rest is still too many."
(Source: BlockBeats)
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