{
  "task_id": "DEV-000104",
  "task_revision": 1,
  "architecture_revision": "ADR-0018",
  "base_repo_revision": "339f6a6",
  "risk_tier": "E",
  "intent": "Prepare the proposed ADR-0020 Agent Execution Plane boundary for review without implementing dispatcher, worker, schema, callback or deployment changes.",
  "requirement_ids": ["WP-300", "Durable dispatch lease heartbeat", "Independent verification and truthful UNKNOWN outcome"],
  "allowed_change_scope": {"modules": ["work-execution-governance"], "paths": ["docs/proposals/ADR-0020-agent-execution-plane-v1.md", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000104-agent-execution-plane-proposal.json"]},
  "forbidden_change_scope": {"paths": ["architecture/**", "contracts/**", "database/**", "migrations/**", "modules/**", "cmd/**", "runtime/**", "adapters/**", "deploy/**", ".gitea/**"]},
  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
  "contracts": {"consume": ["ADR-0017 General Agent Delegation and Codex Bridge V1", "Proposed ADR-0019 Epistemics Truth V1", "Core semantic model Work/Capability/Artifact/Continuity boundaries"], "may_change": ["Proposed ADR-0020 only; no accepted contract changes"]},
  "semantic_owner": "work-execution-plane-proposal-only",
  "canonical_state": [],
  "state_transitions": ["dispatch -> leased -> running -> result -> independently verified", "lease expiry/callback uncertainty -> UNKNOWN or RECOVERING", "cancel request -> acknowledged cancellation or typed unknown"],
  "side_effects_and_privileges": ["No runtime side effects, external mutation, connector access, credential access or authority expansion"],
  "persistence_and_migrations": ["No schema, migration, queue, worker or lease implementation changes"],
  "failure_retry_restart": ["Retry creates a new run and preserves history; late or duplicate callbacks cannot become authoritative"],
  "assumptions": ["Work remains canonical owner of durable delegation execution", "Artifact remains canonical owner of attestation metadata", "Production deployment remains outside this proposal"],
  "acceptance_scenarios": ["Worker identity and dispatch idempotency are explicit", "Lease fencing and heartbeat expiry are explicit", "Callback authentication/replay handling is explicit", "Cancellation/retry/UNKNOWN semantics preserve history", "Independent verification gates Work completion", "No implementation or registry delta is introduced"],
  "required_tests": ["go test ./...", "go vet ./...", "go run ./cmd/devctl preflight -active dev/ACTIVE_TASK.json", "go run ./cmd/devctl check-diff -active dev/ACTIVE_TASK.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl/independent", "git diff --check", "proposal scope and required-section review"],
  "terminal_gap_states": ["BLOCKED_BY_ARCHITECTURE_GAP", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
}