subagent-writes-to-skills-dir-sandbox-blocked
Subagents dispatched via the Agent tool cannot write to /root/.claude/skills/ — the sandbox blocks all writes to that path. Any Stage 2/3 work that edits or creates SKILL.md files inside the skills directory must be executed by the main agent, not delegated to subagents. Workaround: write Bash scripts that do the bulk mutations and run them from the main agent context.