diff --git a/.github/workflows/protocol-validation.yml b/.github/workflows/protocol-validation.yml
index 97257ba..e13d572 100644
--- a/.github/workflows/protocol-validation.yml
+++ b/.github/workflows/protocol-validation.yml
@@ -2,6 +2,9 @@ name: Operational-memory protocol validation
 
 on:
   pull_request:
+  push:
+    branches:
+      - main
   workflow_dispatch:
 
 permissions:
@@ -26,7 +29,10 @@ jobs:
       - name: Validate protocol structure
         run: python tools/validate_protocol.py
 
-# This workflow is intentionally advisory and does not run on every direct
-# operational-memory write. It runs for pull requests or when manually
-# dispatched. PROTOCOL.yaml declares blocking_required_check: false, and the
-# recommended main-branch ruleset does not require this status check.
+# This workflow is intentionally advisory. It runs for pull requests, every
+# push to canonical main (including normal operational-memory writes), or when
+# manually dispatched. Main-push validation is a post-write repository-integrity
+# check; immediate persistence claims still depend on write readback/verification,
+# not on waiting for this workflow. PROTOCOL.yaml declares
+# blocking_required_check: false, and the recommended main-branch ruleset does
+# not require this status check.
diff --git a/OPERATIONS.md b/OPERATIONS.md
index 2c9083c..ad2f6df 100644
--- a/OPERATIONS.md
+++ b/OPERATIONS.md
@@ -144,7 +144,7 @@ A health check has two layers.
 
 Use the advisory validator declared in `PROTOCOL.yaml` when available. It checks machine-verifiable invariants such as required files, project registration/template structure, identifier uniqueness/reference integrity, supersession lifecycle consistency, manifest identity fields, and soft budget warnings.
 
-The included GitHub Action is advisory and intentionally does **not** run on every direct operational-memory write. It runs for pull requests or when manually dispatched. It is **not** a required status check and does not block ordinary direct ChatGPT writes to `main`.
+The included GitHub Action remains advisory, but now runs for pull requests, every push to canonical `main` including normal operational-memory writes, or manual dispatch. A main-push run is an independent post-write repository-integrity check; it does not replace the immediate write/readback verification required before claiming persistence. It is **not** a required status check and does not block ordinary direct ChatGPT writes to `main`.
 
 ### Semantic layer
 
diff --git a/PROTOCOL.yaml b/PROTOCOL.yaml
index ae7e8d6..0c1df6a 100644
--- a/PROTOCOL.yaml
+++ b/PROTOCOL.yaml
@@ -151,6 +151,11 @@ validation:
   mode: advisory
   script: tools/validate_protocol.py
   workflow: .github/workflows/protocol-validation.yml
+  runs_on_pull_request: true
+  runs_on_main_push: true
+  manual_dispatch_available: true
+  main_push_is_post_write_integrity_check: true
+  immediate_persistence_claim_depends_on_readback_not_ci: true
   blocking_required_check: false
 
 release_lifecycle: