diff --git a/.github/workflows/validate-ops-history.yml b/.github/workflows/validate-ops-history.yml
new file mode 100644
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+++ b/.github/workflows/validate-ops-history.yml
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+name: validate-ops-history
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+      - ops-history-spec-hardening
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  validate-ops-history:
+    name: Validate OpsHistory contracts
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Validate OpsHistory schema examples
+        run: |
+          python3 -m pip install jsonschema
+          python3 tools/validate_ops_history_examples.py
+
+      - name: Validate all repo examples through Makefile
+        run: make validate
diff --git a/docs/contract-additions/ops-history-catalog.md b/docs/contract-additions/ops-history-catalog.md
new file mode 100644
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+++ b/docs/contract-additions/ops-history-catalog.md
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+# OpsHistory Contract Catalog
+
+Status: additive contract catalog for OpsHistory, BearHistory, local-first service manifests, operational receipts, context-pack references, and redaction tombstones.
+
+This catalog supplements `schemas/README.md` and `examples/README.md` while the schema index is being normalized.
+
+## Schema additions
+
+| File | Type | URN prefix |
+| --- | --- | --- |
+| `OpsHistoryEvent.json` | OpsHistoryEvent | `urn:srcos:ops-history-event:` |
+| `OpsHistorySyncPolicy.json` | OpsHistorySyncPolicy | `urn:srcos:ops-history-sync-policy:` |
+| `LocalFirstServiceManifest.json` | LocalFirstServiceManifest | `urn:srcos:local-first-service:` |
+| `BearHistoryEvent.json` | BearHistoryEvent | `urn:srcos:bearhistory-event:` |
+| `BearHistorySyncPolicy.json` | BearHistorySyncPolicy | `urn:srcos:bearhistory-sync-policy:` |
+| `ShellReceiptEvent.json` | ShellReceiptEvent | `urn:srcos:shell-receipt-event:` |
+| `OpsHistoryContextPackRef.json` | OpsHistoryContextPackRef | `urn:srcos:context-pack:` |
+| `RedactionTombstone.json` | RedactionTombstone | `urn:srcos:redaction-tombstone:` |
+
+## Example additions
+
+| File | Schema type | Description |
+| --- | --- | --- |
+| `ops-history-event.json` | OpsHistoryEvent | Bounded agent handoff event with summary payload mode and policy/evidence refs. |
+| `ops-history-sync-policy.json` | OpsHistorySyncPolicy | Topology-aware local-first propagation policy with redaction-priority lane. |
+| `local-first-service-manifest.json` | LocalFirstServiceManifest | `ops-historyd` user service manifest with D-Bus endpoints, durable store, subscription posture, and redaction priority. |
+| `bearhistory-event.json` | BearHistoryEvent | BearBrowser agent-runtime navigation metadata with profile-boundary assertions. |
+| `bearhistory-sync-policy.json` | BearHistorySyncPolicy | Human-secure deny-by-default and agent-runtime policy-gated browser sync/export posture. |
+| `shell-receipt-event.json` | ShellReceiptEvent | Metadata-only operational receipt with content capture disabled by default. |
+| `ops-history-context-pack-ref.json` | OpsHistoryContextPackRef | Bounded context-pack reference for Memory Mesh and AgentPlane handoff. |
+| `redaction-tombstone.json` | RedactionTombstone | Critical-priority invalidation object for context, memory, artifact, and replica cleanup. |
+
+## Validation
+
+Run:
+
+```bash
+make validate-ops-history-examples
+```
+
+or:
+
+```bash
+python3 tools/validate_ops_history_examples.py
+```
+
+The root `make validate` target includes the OpsHistory validator.
+
+## Consumer repos
+
+The intended first consumers are:
+
+- `SourceOS-Linux/agent-term`
+- `SourceOS-Linux/BearBrowser`
+- `SourceOS-Linux/sourceos-shell`
+- `SocioProphet/memory-mesh`
+- `SocioProphet/policy-fabric`
+- `SocioProphet/agent-registry`
+- `SocioProphet/agentplane`
+
+## Contract discipline
+
+These contracts are safe-default scaffolds. They do not authorize live sync, browser export, memory writeback, bridge/export, artifact exposure, or agent context hydration by themselves. Those actions require Policy Fabric decisions and Agent Registry authority.
diff --git a/semantic/ops-history-vocabulary.jsonld b/semantic/ops-history-vocabulary.jsonld
new file mode 100644
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+++ b/semantic/ops-history-vocabulary.jsonld
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+{
+  "@context": {
+    "srcos": "https://schemas.srcos.ai/v2/",
+    "prov": "http://www.w3.org/ns/prov#",
+    "OpsHistoryEvent": "srcos:OpsHistoryEvent",
+    "OpsHistorySyncPolicy": "srcos:OpsHistorySyncPolicy",
+    "LocalFirstServiceManifest": "srcos:LocalFirstServiceManifest",
+    "BearHistoryEvent": "srcos:BearHistoryEvent",
+    "BearHistorySyncPolicy": "srcos:BearHistorySyncPolicy",
+    "ShellReceiptEvent": "srcos:ShellReceiptEvent",
+    "OpsHistoryContextPackRef": "srcos:OpsHistoryContextPackRef",
+    "RedactionTombstone": "srcos:RedactionTombstone",
+    "eventId": "srcos:eventId",
+    "eventClass": "srcos:eventClass",
+    "actorRef": "srcos:actorRef",
+    "agentRegistryRef": "srcos:agentRegistryRef",
+    "policyDecisionRefs": "srcos:policyDecisionRefs",
+    "evidenceRefs": "srcos:evidenceRefs",
+    "artifactRefs": "srcos:artifactRefs",
+    "redactionRefs": "srcos:redactionRefs",
+    "payloadMode": "srcos:payloadMode",
+    "contextPackRef": "srcos:contextPackRef",
+    "tombstoneId": "srcos:tombstoneId",
+    "serviceId": "srcos:serviceId",
+    "profileClass": "srcos:profileClass",
+    "sourcePlane": "srcos:sourcePlane",
+    "occurredAt": "prov:generatedAtTime",
+    "issuedAt": "prov:generatedAtTime"
+  },
+  "@id": "https://schemas.srcos.ai/v2/semantic/ops-history-vocabulary.jsonld",
+  "@type": "srcos:Vocabulary",
+  "name": "OpsHistory Vocabulary",
+  "description": "JSON-LD vocabulary additions for OpsHistory, BearHistory, local-first services, operational receipts, context-pack refs, and redaction tombstones."
+}