diff --git a/.github/scripts/test_ci_workflow.py b/.github/scripts/test_ci_workflow.py
index 2bd08a68..4f1971ef 100644
--- a/.github/scripts/test_ci_workflow.py
+++ b/.github/scripts/test_ci_workflow.py
@@ -50,6 +50,7 @@ def test_ci_workflow_guard_is_run_by_ci(self) -> None:
         self.assertIn("python3 .github/scripts/test_milestone_b_internal_checks.py", text)
         self.assertIn("python3 .github/scripts/test_execution_status.py", text)
         self.assertIn("python3 .github/scripts/test_roadmap_status.py", text)
+        self.assertIn("python3 .github/scripts/test_milestone_b_closeout_record.py", text)
 
 
 if __name__ == "__main__":
diff --git a/.github/scripts/test_milestone_b_closeout_record.py b/.github/scripts/test_milestone_b_closeout_record.py
new file mode 100644
index 00000000..580ede29
--- /dev/null
+++ b/.github/scripts/test_milestone_b_closeout_record.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+#
+# Copyright 2026 The Ethos maintainers
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import annotations
+
+import re
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+RECORD = ROOT / "docs/validation/milestone-b-closeout-validation-2026-06-17.md"
+VALIDATION_README = ROOT / "docs/validation/README.md"
+
+
+def record_text() -> str:
+    return RECORD.read_text(encoding="utf-8")
+
+
+def normalized_record_text() -> str:
+    return re.sub(r"\s+", " ", record_text())
+
+
+class MilestoneBCloseoutRecordTests(unittest.TestCase):
+    def test_record_is_indexed(self) -> None:
+        text = VALIDATION_README.read_text(encoding="utf-8")
+
+        self.assertIn("milestone-b-closeout-validation-2026-06-17.md", text)
+
+    def test_record_names_internal_validation_command(self) -> None:
+        text = record_text()
+
+        self.assertIn("make milestone-b-internal-checks PYTHON=<jsonschema-venv>/bin/python", text)
+        self.assertIn("fixtures/validate_fixtures.py", text)
+        self.assertIn("make verify-alpha", text)
+        self.assertIn("make layout-evaluator-alpha", text)
+        self.assertIn("make python-surface-test", text)
+        self.assertIn(".github/scripts/claims_gate.py", text)
+        self.assertIn(".github/scripts/readiness_gate.py public", text)
+
+    def test_record_keeps_public_boundaries_explicit(self) -> None:
+        text = normalized_record_text()
+
+        self.assertIn("does not approve public benchmark reports", text)
+        self.assertIn("release artifacts", text)
+        self.assertIn("package publication", text)
+        self.assertIn("production positioning", text)
+        self.assertIn("Performance, quality, footprint, table-quality, and parser-quality claims remain blocked", text)
+
+    def test_record_avoids_local_private_paths(self) -> None:
+        text = record_text()
+
+        self.assertNotIn("/Users/", text)
+        self.assertNotIn("/private/tmp", text)
+        self.assertNotIn("/private/var", text)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/.github/scripts/test_milestone_b_internal_checks.py b/.github/scripts/test_milestone_b_internal_checks.py
index d18d7a53..c91a6cd1 100644
--- a/.github/scripts/test_milestone_b_internal_checks.py
+++ b/.github/scripts/test_milestone_b_internal_checks.py
@@ -62,6 +62,7 @@ def test_target_composes_current_internal_gates(self) -> None:
             "$(PYTHON) schemas/test_font_policy_validation.py",
             "$(PYTHON) .github/scripts/test_execution_status.py",
             "$(PYTHON) .github/scripts/test_roadmap_status.py",
+            "$(PYTHON) .github/scripts/test_milestone_b_closeout_record.py",
             "$(MAKE) verify-alpha PYTHON=$(PYTHON)",
             "$(MAKE) layout-evaluator-alpha PYTHON=$(PYTHON)",
             "$(MAKE) python-surface-test PYTHON=$(PYTHON)",
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e7850539..ba22e3b2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -62,6 +62,8 @@ jobs:
         run: python3 .github/scripts/test_execution_status.py
       - name: roadmap status tests
         run: python3 .github/scripts/test_roadmap_status.py
+      - name: Milestone B closeout validation record tests
+        run: python3 .github/scripts/test_milestone_b_closeout_record.py
       - name: Gate Zero harness tests
         run: python3 benchmarks/harness/test_run_gate_zero.py
       - name: same-platform double-parse byte-diff
diff --git a/Makefile b/Makefile
index abf4a9d8..6c1b324b 100644
--- a/Makefile
+++ b/Makefile
@@ -53,6 +53,7 @@ milestone-b-internal-checks:
 	$(PYTHON) schemas/test_font_policy_validation.py
 	$(PYTHON) .github/scripts/test_execution_status.py
 	$(PYTHON) .github/scripts/test_roadmap_status.py
+	$(PYTHON) .github/scripts/test_milestone_b_closeout_record.py
 	$(MAKE) verify-alpha PYTHON=$(PYTHON)
 	$(MAKE) layout-evaluator-alpha PYTHON=$(PYTHON)
 	$(MAKE) python-surface-test PYTHON=$(PYTHON)
diff --git a/docs/validation/README.md b/docs/validation/README.md
index b75eb654..daba668f 100644
--- a/docs/validation/README.md
+++ b/docs/validation/README.md
@@ -22,6 +22,9 @@ Records:
   non-advisory `cargo-deny` policy checks pass; the follow-up advisory scan is recorded in
   `advisory-scan-2026-06-16.md`, and release artifacts still need artifact-specific
   license/NOTICE bundles.
+- `milestone-b-closeout-validation-2026-06-17.md` - internal Milestone B closeout validation
+  passed through `make milestone-b-internal-checks`; public benchmark reports, release artifacts,
+  package publication, production positioning, and claim wording remain blocked.
 - `public-evidence-scan-2026-06-15.md` - tracked evidence and benchmark-result locations were
   scanned for private paths, hostnames, and generated Gate Zero output that belongs in
   `ethos-bench`.
diff --git a/docs/validation/milestone-b-closeout-validation-2026-06-17.md b/docs/validation/milestone-b-closeout-validation-2026-06-17.md
new file mode 100644
index 00000000..a5221ddb
--- /dev/null
+++ b/docs/validation/milestone-b-closeout-validation-2026-06-17.md
@@ -0,0 +1,74 @@
+# Milestone B Closeout Validation - 2026-06-17
+
+## Purpose
+
+Record the current internal Milestone B validation run after the status and roadmap closeout
+guards landed on `main`.
+
+This record covers the source tree's internal pre-alpha validation path only. It does not approve
+public benchmark reports, release artifacts, package publication, production positioning, or
+performance, quality, or footprint claims.
+
+## Status
+
+Status: **pass for current internal Milestone B validation, with public blockers unchanged**.
+
+## Subject
+
+- Repository: `docushell/ethos`
+- Starting HEAD before this record: `cc1fda28d68c549dbf9a478aa89cbc99df7960ca`
+- Scope: tracked source tree, committed fixtures, committed examples, CI/static guard wiring, and
+  public-boundary gates
+- Excluded: benchmark-result publication, release artifacts, package publication, production
+  positioning, and external claim wording
+
+## Commands
+
+```sh
+git switch main
+git pull --ff-only
+make milestone-b-internal-checks PYTHON=<jsonschema-venv>/bin/python
+```
+
+The aggregate target currently composes:
+
+- `fixtures/validate_fixtures.py`
+- `schemas/test_font_policy_validation.py`
+- `.github/scripts/test_execution_status.py`
+- `.github/scripts/test_roadmap_status.py`
+- `make verify-alpha`
+- `make layout-evaluator-alpha`
+- `make python-surface-test`
+- `.github/scripts/claims_gate.py`
+- `.github/scripts/readiness_gate.py public`
+- `git diff --check`
+
+## Result
+
+```text
+fixture checks green
+font policy validation tests green
+execution status tests green
+roadmap status tests green
+verify-alpha green
+layout-evaluator-alpha green
+python surface tests green
+claims gate green
+public readiness: green
+git diff --check green
+```
+
+## Remaining Boundaries
+
+- Public benchmark reports remain blocked.
+- Release artifacts and package publication remain blocked.
+- Production positioning remains blocked.
+- Performance, quality, footprint, table-quality, and parser-quality claims remain blocked.
+- Cross-platform rendered image byte equality remains unclaimed.
+- Broader parser/layout/table/OCR semantics remain future work outside this closeout record.
+
+## Follow-up
+
+Use `make milestone-b-internal-checks` as the internal closeout validation command until the next
+milestone changes the validation contract. Contract changes should update the Make target, its
+static guard, and any dated validation record that cites the target.