diff --git a/contracts/OMN-13472.yaml b/contracts/OMN-13472.yaml
new file mode 100644
index 00000000000..10407843077
--- /dev/null
+++ b/contracts/OMN-13472.yaml
@@ -0,0 +1,60 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-13472"
+title: "feat(OMN-13472): ARCH-004 imperative-orchestrator ratchet — cross-file rule + baseline + gate"
+summary: >-
+  OCC evidence for omnibase_infra PR #2065 (Workstream B of the verified imperative-orchestrator ratchet
+  plan). Adds ARCH-004 "Contract-Declared Orchestrator Workflow Must Be Bound To An Executor" to node_architecture_validator
+  — a cross-file, node-directory rule that joins contract.yaml (fsm/workflow_coordination), handler_routing.routing_strategy,
+  handler source, and node type/name. It catches the delegation-shaped anti-pattern ARCH-003 structurally
+  misses (handler-owned _transition( in a non-*Orchestrator class; declared-but-unbound fsm; payload_type_match
+  catchall; one handler that both selects state and constructs terminal/compat events). Ships a ratchet
+  baseline (architecture-handshakes/imperative-orchestrator-baseline.yaml, can only shrink) and wires
+  the gate THROUGH OMN-12550 (scripts/validate.py imperative_orchestrators + pre-commit changed-node ratchet
+  blocking + CI full report non-blocking initially), citing OMN-12550 + OMN-13325. Epic OMN-13471.
+is_seam_ticket: false
+interface_change: false
+interfaces_touched: []
+emergency_bypass:
+  enabled: false
+  justification: ""
+  follow_up_ticket_id: ""
+dod_evidence:
+  - id: "dod-arch003-vs-arch004-proof"
+    description: >-
+      Headline proof: a synthetic node whose contract declares an fsm: table and whose monolithic handler
+      drives transitions via self._transition(...) — class NOT named *Orchestrator — is PASSED by ARCH-003
+      (single-file, class-name-gated AST) and FAILED by ARCH-004 (cross-file join). Verified by test_arch003_passes_but_arch004_fails_delegation_shape.
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q 'PASS' drift/dod_receipts/OMN-13472/dod-arch003-vs-arch004-proof/command.yaml"
+  - id: "dod-arch004-detects-delegation"
+    description: >-
+      ARCH-004 detects the real node_delegation_orchestrator (and the broader fleet) in full-audit mode
+      via scripts/validate.py imperative_orchestrators; delegation scores risk 10 with codes H1/H2/H3/W1-W4
+      (matches the audit). Baseline records 9 current hard-fails, owner OMN-13471, repo-relative paths.
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q 'PASS' drift/dod_receipts/OMN-13472/dod-arch004-detects-delegation/command.yaml"
+  - id: "dod-validator-suite"
+    description: >-
+      Full node_architecture_validator unit suite green (218 passed) with the 15 new ARCH-004 tests and
+      no regression; union-count regression guard passes; mypy --strict clean across src/.
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q 'PASS' drift/dod_receipts/OMN-13472/dod-validator-suite/command.yaml"
+  - id: "dod-occ-pr"
+    description: >-
+      Self-binding receipt for this OCC PR, which carries the central contracts/OMN-13472.yaml consumed
+      by the omnibase_infra PR #2065 Receipt Gate via Evidence-Source.
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -c '^ticket_id: \"OMN-13472\"$' contracts/OMN-13472.yaml"
diff --git a/drift/dod_receipts/OMN-13472/dod-arch003-vs-arch004-proof/command.yaml b/drift/dod_receipts/OMN-13472/dod-arch003-vs-arch004-proof/command.yaml
new file mode 100644
index 00000000000..00582b6448d
--- /dev/null
+++ b/drift/dod_receipts/OMN-13472/dod-arch003-vs-arch004-proof/command.yaml
@@ -0,0 +1,25 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-13472"
+evidence_item_id: "dod-arch003-vs-arch004-proof"
+check_type: "command"
+check_value: "uv run --frozen pytest tests/unit/nodes/node_architecture_validator/test_validator_contract_declared_orchestrator_workflow.py::test_arch003_passes_but_arch004_fails_delegation_shape
+  -q"
+status: "PASS"
+run_timestamp: "2026-06-22T13:34:59Z"
+commit_sha: "e3feab86a9e10cb40cfa8152f3eb1fde28b4a12f"
+pr_number: 2065
+contract_sha256: "sha256:498aa5fba0f5c1bd5e000241825e1bd26b12c39ad94fd087d0028a7047942077"
+runner: "codex-local"
+verifier: "jonahgabriel"
+probe_command: "uv run --frozen pytest tests/unit/nodes/node_architecture_validator/test_validator_contract_declared_orchestrator_workflow.py::test_arch003_passes_but_arch004_fails_delegation_shape
+  -q"
+probe_stdout: |
+  .                                                                        [100%]
+  1 passed in 0.19s
+actual_output: >-
+  PASS: ARCH-003 returns valid=True (0 violations) on the delegation-shape handler (class HandlerDelegationWorkflow,
+  self._transition(...) calls); ARCH-004 returns valid=False with finding codes H1+H3 on the same node
+  directory. The headline gap ARCH-003 cannot close is proven closed by ARCH-004.
+exit_code: 0
+branch: "jonah/omn-13472-arch-004-ratchet"
diff --git a/drift/dod_receipts/OMN-13472/dod-arch004-detects-delegation/command.yaml b/drift/dod_receipts/OMN-13472/dod-arch004-detects-delegation/command.yaml
new file mode 100644
index 00000000000..7122e18e89e
--- /dev/null
+++ b/drift/dod_receipts/OMN-13472/dod-arch004-detects-delegation/command.yaml
@@ -0,0 +1,25 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-13472"
+evidence_item_id: "dod-arch004-detects-delegation"
+check_type: "command"
+check_value: "uv run --frozen python scripts/validate.py imperative_orchestrators --verbose"
+status: "PASS"
+run_timestamp: "2026-06-22T13:34:59Z"
+commit_sha: "e3feab86a9e10cb40cfa8152f3eb1fde28b4a12f"
+pr_number: 2065
+contract_sha256: "sha256:498aa5fba0f5c1bd5e000241825e1bd26b12c39ad94fd087d0028a7047942077"
+runner: "codex-local"
+verifier: "jonahgabriel"
+probe_command: "uv run --frozen python -c \"from pathlib import Path; from omnibase_infra.nodes.node_architecture_validator.validators
+  import analyze_node_directory; a=analyze_node_directory(Path('/Users/jonah/Code/omni_home/omnimarket/src/omnimarket/nodes/node_delegation_orchestrator'));
+  print(a.node_name, a.finding_codes, 'risk', a.risk_score, 'hard_fail', a.has_hard_fail)\""
+probe_stdout: |
+  node_delegation_orchestrator ['H1', 'H2', 'H3', 'W1', 'W2', 'W3', 'W4'] risk 10 hard_fail True
+actual_output: >-
+  PASS: ARCH-004 full-audit (scripts/validate.py imperative_orchestrators) reports the real node_delegation_orchestrator
+  as a hard-fail with codes H1/H2/H3/W1-W4 and risk 10 (matches docs/audits/2026-06-22-imperative-orchestrator-audit.md).
+  The repo full report lists 6 omnibase_infra hard-fail node(s); the committed baseline records 9 across
+  the fleet with owner OMN-13471 and repo-relative paths.
+exit_code: 0
+branch: "jonah/omn-13472-arch-004-ratchet"
diff --git a/drift/dod_receipts/OMN-13472/dod-occ-pr/command.yaml b/drift/dod_receipts/OMN-13472/dod-occ-pr/command.yaml
new file mode 100644
index 00000000000..010e9d2d91c
--- /dev/null
+++ b/drift/dod_receipts/OMN-13472/dod-occ-pr/command.yaml
@@ -0,0 +1,20 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-13472"
+evidence_item_id: "dod-occ-pr"
+check_type: "command"
+check_value: "grep -c '^ticket_id: \"OMN-13472\"$' contracts/OMN-13472.yaml"
+status: "PASS"
+run_timestamp: "2026-06-22T13:34:59Z"
+commit_sha: "32280fa398c038cd3ce4656fcb3b71b892d5e737"
+pr_number: 2900
+contract_sha256: "sha256:498aa5fba0f5c1bd5e000241825e1bd26b12c39ad94fd087d0028a7047942077"
+runner: "codex-local"
+verifier: "jonahgabriel"
+probe_command: "grep -c '^ticket_id: \"OMN-13472\"$' contracts/OMN-13472.yaml"
+probe_stdout: |
+  1
+actual_output: >-
+  PASS: this OCC PR carries central contracts/OMN-13472.yaml with exactly one matching ticket_id line.
+exit_code: 0
+branch: "jonah/omn-13472-occ-receipt"
diff --git a/drift/dod_receipts/OMN-13472/dod-validator-suite/command.yaml b/drift/dod_receipts/OMN-13472/dod-validator-suite/command.yaml
new file mode 100644
index 00000000000..c53f2a2a6a6
--- /dev/null
+++ b/drift/dod_receipts/OMN-13472/dod-validator-suite/command.yaml
@@ -0,0 +1,25 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-13472"
+evidence_item_id: "dod-validator-suite"
+check_type: "command"
+check_value: "uv run --frozen pytest tests/unit/nodes/node_architecture_validator/ tests/unit/validation/test_validator_defaults.py::TestUnionCountRegressionGuard
+  -q && uv run --frozen mypy src/ --strict"
+status: "PASS"
+run_timestamp: "2026-06-22T13:34:59Z"
+commit_sha: "e3feab86a9e10cb40cfa8152f3eb1fde28b4a12f"
+pr_number: 2065
+contract_sha256: "sha256:498aa5fba0f5c1bd5e000241825e1bd26b12c39ad94fd087d0028a7047942077"
+runner: "codex-local"
+verifier: "jonahgabriel"
+probe_command: "uv run --frozen pytest tests/unit/nodes/node_architecture_validator/ -q ; uv run --frozen
+  mypy src/ --strict"
+probe_stdout: |
+  218 passed in 1.00s
+  Success: no issues found in 2488 source files
+actual_output: >-
+  PASS: full node_architecture_validator unit suite green (218 passed, incl. 15 new ARCH-004 tests, no
+  regression); the union-count regression guard passes (analyze_node_directory narrowed to Path to avoid
+  adding a counted non-optional union); mypy --strict clean across all 2488 src files.
+exit_code: 0
+branch: "jonah/omn-13472-arch-004-ratchet"