Tip: Claude Code's disallowed-tools Frontmatter Enables Sandboxed Skill Workflows

Releasebot·medium signal

Claude Code 2.1.152's new disallowed-tools skill frontmatter field lets you remove specific tools while a skill is active. This enables constrained workflows: a 'review-only' skill that strips Edit/Write/Bash, a 'research' skill that keeps only Read/Grep/WebSearch, or a 'plan-mode' skill that blocks all execution tools. Combined with /reload-skills for instant iteration and SessionStart hooks that can auto-load skills, this creates a composable permission system for different agent roles without modifying global settings.