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Six numbered plan documents covering: - 01 Hook IO Discipline (#2376) - 02 Spawn-Contract Templating (#2377) - 03 Worker / Daemon Lifecycle Hardening (#2378) - 04 Installer Failure Transparency (#2379) - 05 Observer SDK Tool Enforcement (#2380) - 06 Worker Env Isolation (#2381) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>