{
  "task_id": "DEV-000290",
  "task_revision": 1,
  "architecture_revision": "ADR-0018",
  "base_repo_revision": "e9d5b1ca8a2aa14fb11241c2766e79547a469078",
  "risk_tier": "E",
  "intent": "Constrain authenticated chat header controls at mobile viewport widths after live acceptance found a second horizontal overflow source.",
  "requirement_ids": ["authenticated mobile UI acceptance", "no horizontal overflow at 390px"],
  "allowed_change_scope": {"modules": ["creator-web"], "paths": ["dev/ACTIVE_TASK.json", "dev/tasks/DEV-000290-chat-mobile-header-overflow.json", "cmd/creator-web/static/assets/chat.css", "cmd/creator-web/responsive_test.go"]},
  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "database/**", "LLM-local/**", "modules/**", "adapters/**"]},
  "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": ["existing creator-web header controls"], "may_change": []},
  "semantic_owner": "creator-web presentation",
  "canonical_state": ["none"],
  "state_transitions": ["header intrinsic controls -> bounded mobile controls"],
  "side_effects_and_privileges": ["none"],
  "persistence_and_migrations": ["none"],
  "failure_retry_restart": ["CSS-only; no runtime state or recovery semantics changed"],
  "assumptions": ["desktop header remains unchanged", "the settings link remains available through the cognitive console link"],
  "acceptance_scenarios": ["authenticated chat has no horizontal overflow at 390px", "settings navigation remains available", "logout remains visible", "desktop static layout remains unchanged"],
  "required_tests": ["go test ./cmd/creator-web", "go vet ./cmd/creator-web", "preflight", "check-diff", "check-architecture", "independent", "git diff --check", "CI", "production health smoke", "one authenticated mobile smoke"],
  "terminal_gap_states": ["BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_ARCHITECTURE_GAP", "BLOCKED_BY_MISSING_CAPABILITY"]
}