diff --git a/contracts/OMN-12346.yaml b/contracts/OMN-12346.yaml
new file mode 100644
index 00000000000..f7a16706e5f
--- /dev/null
+++ b/contracts/OMN-12346.yaml
@@ -0,0 +1,64 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12346"
+title: "Implement omnimarket contract drift compute runtime handler"
+summary: >
+  Bind central evidence for omnimarket PR #955, which removes the node_contract_drift_compute runtime
+  stub and implements deterministic contract-vs-handler topic drift detection using the node contract
+  and typed Pydantic request/result models as the source of truth.
+is_seam_ticket: true
+interface_change: true
+interfaces_touched:
+  - events
+  - topics
+  - public_api
+emergency_bypass:
+  enabled: false
+  justification: ""
+  follow_up_ticket_id: ""
+dod_evidence:
+  - id: "dod-omnimarket-pr-955"
+    description: "Bind OMN-12346 evidence to omnimarket PR #955."
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' drift/dod_receipts/OMN-12346/dod-omnimarket-pr-955/command.yaml
+          && grep -q '^pr_number: 955$' drift/dod_receipts/OMN-12346/dod-omnimarket-pr-955/command.yaml"
+  - id: "dod-contract-drift-focused-tests"
+    description: "Focused OMN-12346 golden-chain tests, lint, and formatting pass for the contract drift
+      compute node."
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' drift/dod_receipts/OMN-12346/dod-contract-drift-focused-tests/command.yaml
+          && grep -q '23 passed' drift/dod_receipts/OMN-12346/dod-contract-drift-focused-tests/command.yaml
+          && grep -q 'All checks passed' drift/dod_receipts/OMN-12346/dod-contract-drift-focused-tests/command.yaml"
+  - id: "dod-contract-drift-broader-validation"
+    description: "Adjacent contract sweep, node drift, topic lint, market-skill smoke, and projection-query
+      validation pass for omnimarket PR #955."
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' drift/dod_receipts/OMN-12346/dod-contract-drift-broader-validation/command.yaml
+          && grep -q '290 contracts checked' drift/dod_receipts/OMN-12346/dod-contract-drift-broader-validation/command.yaml
+          && grep -q '0 drift findings' drift/dod_receipts/OMN-12346/dod-contract-drift-broader-validation/command.yaml"
+  - id: "dod-deploy-readiness"
+    description: "Deploy gate evidence: the compute node remains pure/read-only, declares native event-bus
+      topics, and requires no live runtime deploy before merge."
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' drift/dod_receipts/OMN-12346/dod-deploy-readiness/command.yaml
+          && grep -qi 'deploy readiness' drift/dod_receipts/OMN-12346/dod-deploy-readiness/command.yaml"
+  - id: "dod-occ-pr"
+    description: "OCC PR #1810 carries the central OMN-12346 contract and receipts."
+    source: "manual"
+    status: "verified"
+    checks:
+      - check_type: "command"
+        check_value: "grep -q '^status: PASS$' drift/dod_receipts/OMN-12346/dod-occ-pr/command.yaml &&
+          grep -q '^pr_number: 1810$' drift/dod_receipts/OMN-12346/dod-occ-pr/command.yaml"
diff --git a/drift/dod_receipts/OMN-12346/dod-contract-drift-broader-validation/command.yaml b/drift/dod_receipts/OMN-12346/dod-contract-drift-broader-validation/command.yaml
new file mode 100644
index 00000000000..6693c48b9e0
--- /dev/null
+++ b/drift/dod_receipts/OMN-12346/dod-contract-drift-broader-validation/command.yaml
@@ -0,0 +1,30 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12346"
+evidence_item_id: "dod-contract-drift-broader-validation"
+check_type: "command"
+check_value: "uv run pytest tests/nodes/node_contract_sweep/test_handler_contract_sweep.py tests/ci/test_check_no_hardcoded_topics.py
+  tests/unit/scripts/test_validate_node_drift.py tests/unit/scripts/test_contract_config_audit.py tests/unit/contracts/test_contract_classification.py
+  tests/test_market_skill_smokes.py tests/test_golden_chain_projection_query.py -q && uv run python scripts/validate_node_drift.py
+  --check-changed origin/dev --strict && native handler scan"
+contract_sha256: "sha256:c88d259f88b22039e36b7cc1482a95542db2a999acd8548a26130aa3b2926c55"
+status: PASS
+run_timestamp: "2026-05-28T20:54:36Z"
+commit_sha: "d6efaa9154436e9a2ba51e6861e66cc5ef56ec77"
+runner: "codex-local"
+verifier: "codex"
+probe_command: "broader OMN-12346 local validation in /Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/omnimarket"
+probe_stdout: |
+  tests/nodes/node_contract_sweep/test_handler_contract_sweep.py: 7 passed in 0.08s
+  tests/ci/test_check_no_hardcoded_topics.py: 9 passed in 0.53s
+  tests/unit/scripts/test_validate_node_drift.py tests/unit/scripts/test_contract_config_audit.py tests/unit/contracts/test_contract_classification.py: 17 passed in 3.08s
+  scripts/validate_node_drift.py --check-changed origin/dev --strict: PASS with one best-effort topic_handler_alignment warning
+  native handler scan: repos=['omnimarket'], check_boundaries=False => clean, 290 contracts checked, 0 drift findings
+  tests/test_market_skill_smokes.py: 10 passed in 6.51s
+  tests/test_golden_chain_projection_query.py: 26 passed in 0.10s
+actual_output: "PASS: broader adjacent contract, topic, market-skill, projection, and native handler scan
+  validation passed locally with 290 contracts checked and 0 drift findings."
+exit_code: 0
+pr_number: 955
+branch: "jonah/omn-12346-contract-drift-runtime-handler"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/omnimarket"
diff --git a/drift/dod_receipts/OMN-12346/dod-contract-drift-focused-tests/command.yaml b/drift/dod_receipts/OMN-12346/dod-contract-drift-focused-tests/command.yaml
new file mode 100644
index 00000000000..7b3a8db9dd8
--- /dev/null
+++ b/drift/dod_receipts/OMN-12346/dod-contract-drift-focused-tests/command.yaml
@@ -0,0 +1,27 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12346"
+evidence_item_id: "dod-contract-drift-focused-tests"
+check_type: "command"
+check_value: "uv run pytest src/omnimarket/nodes/node_contract_drift_compute/tests/test_golden_chain.py
+  -q && uv run ruff check src/omnimarket/nodes/node_contract_drift_compute && uv run ruff format --check
+  src/omnimarket/nodes/node_contract_drift_compute && uv run mypy src/omnimarket/nodes/node_contract_drift_compute/handlers/handler_contract_drift_compute.py
+  --strict"
+contract_sha256: "sha256:c88d259f88b22039e36b7cc1482a95542db2a999acd8548a26130aa3b2926c55"
+status: PASS
+run_timestamp: "2026-05-28T20:54:36Z"
+commit_sha: "d6efaa9154436e9a2ba51e6861e66cc5ef56ec77"
+runner: "codex-local"
+verifier: "codex"
+probe_command: "focused OMN-12346 local validation in /Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/omnimarket"
+probe_stdout: |
+  pytest: 23 passed in 0.22s
+  ruff check: All checks passed!
+  ruff format --check: 6 files already formatted
+  mypy strict: Success: no issues found in 1 source file
+actual_output: "PASS: node_contract_drift_compute focused golden-chain tests, lint, format, and strict
+  mypy checks passed locally."
+exit_code: 0
+pr_number: 955
+branch: "jonah/omn-12346-contract-drift-runtime-handler"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/omnimarket"
diff --git a/drift/dod_receipts/OMN-12346/dod-deploy-readiness/command.yaml b/drift/dod_receipts/OMN-12346/dod-deploy-readiness/command.yaml
new file mode 100644
index 00000000000..dd3477853dd
--- /dev/null
+++ b/drift/dod_receipts/OMN-12346/dod-deploy-readiness/command.yaml
@@ -0,0 +1,27 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12346"
+evidence_item_id: "dod-deploy-readiness"
+check_type: "command"
+check_value: "deploy readiness assessment for node_contract_drift_compute: compute contract declares purity,
+  idempotence, native Kafka subscribe/publish topics, terminal_event, and read-only deterministic filesystem
+  scan behavior"
+contract_sha256: "sha256:c88d259f88b22039e36b7cc1482a95542db2a999acd8548a26130aa3b2926c55"
+status: PASS
+run_timestamp: "2026-05-28T20:54:36Z"
+commit_sha: "d6efaa9154436e9a2ba51e6861e66cc5ef56ec77"
+runner: "codex-local"
+verifier: "codex"
+probe_command: "deploy readiness assessment for OMN-12346 contract drift compute node"
+probe_stdout: |
+  deploy readiness: node_contract_drift_compute contract declares node_type=compute,
+  descriptor.purity=pure, descriptor.idempotent=true, native event_bus subscribe/publish topics,
+  terminal_event=onex.evt.omnimarket.contract-drift-compute-completed.v1, and transport_type=kafka.
+  Handler implementation performs deterministic read-only contract/handler topic scanning and no live
+  deploy or runtime restart is required before merge.
+actual_output: "PASS: deploy readiness evidence recorded for OMN-12346; no live runtime deploy is required
+  before merge."
+exit_code: 0
+pr_number: 955
+branch: "jonah/omn-12346-contract-drift-runtime-handler"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/omnimarket"
diff --git a/drift/dod_receipts/OMN-12346/dod-occ-pr/command.yaml b/drift/dod_receipts/OMN-12346/dod-occ-pr/command.yaml
new file mode 100644
index 00000000000..74dd463b15b
--- /dev/null
+++ b/drift/dod_receipts/OMN-12346/dod-occ-pr/command.yaml
@@ -0,0 +1,20 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12346"
+evidence_item_id: "dod-occ-pr"
+check_type: "command"
+check_value: "gh pr view 1810 --repo OmniNode-ai/onex_change_control --json number,headRefName,title,state,headRefOid,baseRefName"
+contract_sha256: "sha256:c88d259f88b22039e36b7cc1482a95542db2a999acd8548a26130aa3b2926c55"
+status: PASS
+run_timestamp: "2026-05-28T21:03:00Z"
+commit_sha: "1aeebd7f"
+runner: "codex-local"
+verifier: "codex"
+probe_command: "gh pr view 1810 --repo OmniNode-ai/onex_change_control --json number,headRefName,title,state,headRefOid,baseRefName"
+probe_stdout: |
+  {"baseRefName":"dev","headRefName":"jonah/omn-12346-occ-evidence","headRefOid":"1aeebd7f","number":1810,"state":"OPEN","title":"contracts(OMN-12346): add contract drift compute evidence"}
+actual_output: "PASS: OCC PR #1810 carries the central OMN-12346 contract and receipts."
+exit_code: 0
+pr_number: 1810
+branch: "jonah/omn-12346-occ-evidence"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/onex_change_control"
diff --git a/drift/dod_receipts/OMN-12346/dod-omnimarket-pr-955/command.yaml b/drift/dod_receipts/OMN-12346/dod-omnimarket-pr-955/command.yaml
new file mode 100644
index 00000000000..31f521d4ea3
--- /dev/null
+++ b/drift/dod_receipts/OMN-12346/dod-omnimarket-pr-955/command.yaml
@@ -0,0 +1,21 @@
+---
+schema_version: "1.0.0"
+ticket_id: "OMN-12346"
+evidence_item_id: "dod-omnimarket-pr-955"
+check_type: "command"
+check_value: "gh pr view 955 --repo OmniNode-ai/omnimarket --json number,headRefOid,headRefName,title,state"
+contract_sha256: "sha256:c88d259f88b22039e36b7cc1482a95542db2a999acd8548a26130aa3b2926c55"
+status: PASS
+run_timestamp: "2026-05-28T20:54:36Z"
+commit_sha: "d6efaa9154436e9a2ba51e6861e66cc5ef56ec77"
+runner: "codex-local"
+verifier: "codex"
+probe_command: "gh pr view 955 --repo OmniNode-ai/omnimarket --json number,headRefOid,headRefName,title,state"
+probe_stdout: |
+  {"headRefName":"jonah/omn-12346-contract-drift-runtime-handler","headRefOid":"d6efaa9154436e9a2ba51e6861e66cc5ef56ec77","number":955,"state":"OPEN","title":"OMN-12346 implement contract drift compute runtime handler"}
+actual_output: "PASS: omnimarket PR #955 is open at the OMN-12346 contract drift compute handler head
+  commit d6efaa9154436e9a2ba51e6861e66cc5ef56ec77."
+exit_code: 0
+pr_number: 955
+branch: "jonah/omn-12346-contract-drift-runtime-handler"
+working_dir: "/Users/jonah/Code/omni_home/omni_worktrees/OMN-12346/omnimarket"