What problem does it solve? Coordinating the human–planner–executor contract in an AI-assisted development workflow requires a dedicated observer seat that launches executor sessions for milestones, independently verifies delivered milestone PRs before merge, and tears down infrastructure after landing — without ever deciding product semantics or merging code itself. ## Core Features & Use Cases - Launch: Provision a git worktree, executor session, and Docker sandbox in one step via kinfra impl, then kick off the executor with the milestone brief and environment facts. - Verify: Independently re-run the brief's blocking tests against the PR head, run the contract-integrity guard, gate every "For the human" item with the human before merge, and push the spec bookkeeping commit onto the PR branch. - Land: Confirm the spec's Decomposition row landed with the merge, tear down the worktree, sandbox slot, and session with kinfra done, and launch newly unblocked dependent milestones. - Use Case: After a planner signs a feature spec with three milestones, use this seat to launch each executor session, verify each milestone PR's blocking tests and verdict report before the human merges, and land each merge with full teardown. ## Quick Start Ask the assistant to run /kobserve launch reminders/M1 to start an executor session for the first milestone of a signed feature spec.