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+Homelab #766 exact-tree review delta: immutable tree 556ae4ea04f2715a4e9d381f3cafaf4c8b991b2e is REQUEST CHANGES. Verified blockers: HIGH unsafe installed TOOLS.md symlink content can be injected before unsafe-status reporting; HIGH ambient MOSAIC_AGENT_CLASS can confer persona authority contradicting the canonical roster member; MEDIUM connector schema accepts empty required strings rejected by parser. Focused 317/317 and other gates pass but do not clear these reproductions. Same sole owner resumed red-first remediation; commit/push/PR/context/live holds remain.