diff --git a/.gitea/scripts/lint-workflow-yaml.py b/.gitea/scripts/lint-workflow-yaml.py
index 34cfefe6..bd254c90 100755
--- a/.gitea/scripts/lint-workflow-yaml.py
+++ b/.gitea/scripts/lint-workflow-yaml.py
@@ -36,6 +36,9 @@ Rules (4 fatal + 1 fatal cross-file + 1 heuristic-warn):
      raw `.error` fields into CI logs/summaries.
   9. Production deploy/redeploy workflows must expose an operational control:
      kill switch for auto deploys or rollback tag for manual deploys.
+  10. Docker health checks must not run `docker info | head` under pipefail.
+      `head` closes the pipe early, `docker info` can exit nonzero from
+      SIGPIPE, and the step can falsely report Docker daemon failure.
 
 Per `feedback_smoke_test_vendor_truth_not_shape_match`: fixtures used to
 validate this lint must mirror real Gitea 1.22.6 YAML semantics, not
@@ -225,6 +228,24 @@ def _iter_uses(doc: Any) -> Iterable[str]:
                 yield step["uses"]
 
 
+def _iter_run_blocks(doc: Any) -> Iterable[str]:
+    """Yield every shell `run:` block from job steps in a workflow document."""
+    if not isinstance(doc, dict):
+        return
+    jobs = doc.get("jobs")
+    if not isinstance(jobs, dict):
+        return
+    for job in jobs.values():
+        if not isinstance(job, dict):
+            continue
+        steps = job.get("steps")
+        if not isinstance(steps, list):
+            continue
+        for step in steps:
+            if isinstance(step, dict) and isinstance(step.get("run"), str):
+                yield step["run"]
+
+
 def check_cross_repo_uses(filename: str, doc: Any) -> list[str]:
     """Return per-violation error lines for cross-repo `uses:` references."""
     errors: list[str] = []
@@ -264,6 +285,10 @@ GITHUB_API_REF_RE = re.compile(
 
 PROD_CP_URL_RE = re.compile(r"https://api\.moleculesai\.app\b")
 REDEPLOY_FLEET_RE = re.compile(r"\b/cp/admin/tenants/redeploy-fleet\b")
+RUN_SETS_PIPEFAIL_RE = re.compile(r"(?m)^\s*set\s+-[^\n]*o\s+pipefail\b")
+DOCKER_INFO_HEAD_PIPE_RE = re.compile(
+    r"(?m)^\s*docker\s+info\b[^\n|]*\|\s*head\b"
+)
 RAW_CP_RESPONSE_RE = re.compile(
     r"""(?x)
     (?:\bjq\s+\.\s+["']?\$HTTP_RESPONSE["']?)
@@ -383,6 +408,30 @@ def check_production_operational_control(filename: str, raw: str) -> list[str]:
     return errors
 
 
+# ---------------------------------------------------------------------------
+# Rule 10 — docker info piped to head under pipefail
+# ---------------------------------------------------------------------------
+
+def check_docker_info_head_pipefail(filename: str, doc: Any) -> list[str]:
+    errors: list[str] = []
+    for run_block in _iter_run_blocks(doc):
+        if not (
+            RUN_SETS_PIPEFAIL_RE.search(run_block)
+            and DOCKER_INFO_HEAD_PIPE_RE.search(run_block)
+        ):
+            continue
+        errors.append(
+            f"::error file={filename}::Rule 10 (FATAL): workflow runs "
+            f"`docker info | head` after enabling `pipefail`. `head` can "
+            f"close the pipe early, making `docker info` exit nonzero and "
+            f"falsely fail the Docker daemon health check. Capture "
+            f"`docker_info=\"$(docker info 2>&1)\"` first, then print a "
+            f"bounded preview with `printf ... | sed -n '1,5p'`."
+        )
+        break
+    return errors
+
+
 # ---------------------------------------------------------------------------
 # Driver
 # ---------------------------------------------------------------------------
@@ -436,6 +485,7 @@ def main(argv: list[str] | None = None) -> int:
         fatal_errors.extend(check_production_concurrency(rel, doc, raw))
         fatal_errors.extend(check_production_raw_response_logging(rel, raw))
         fatal_errors.extend(check_production_operational_control(rel, raw))
+        fatal_errors.extend(check_docker_info_head_pipefail(rel, doc))
         warnings.extend(check_github_server_url_missing(rel, doc, raw))
 
     # Cross-file checks
diff --git a/.gitea/scripts/review-check.sh b/.gitea/scripts/review-check.sh
index ef238e36..5bc00448 100755
--- a/.gitea/scripts/review-check.sh
+++ b/.gitea/scripts/review-check.sh
@@ -145,7 +145,7 @@ if [ -z "$PR_AUTHOR" ] || [ -z "$PR_HEAD_SHA" ]; then
 fi
 
 # --- RFC#324 §N/A follow-up: check N/A declarations status ---
-# sop-checklist-gate.py posts `sop-checklist / na-declarations (pull_request)`
+# sop-checklist.py posts `sop-checklist / na-declarations (pull_request)`
 # status when a peer posts /sop-n/a <gate>. If our gate is declared N/A,
 # the requirement for a Gitea APPROVE review is waived.
 NA_STATUSES_TMP=$(mktemp)
diff --git a/.gitea/scripts/sop-checklist-gate.py b/.gitea/scripts/sop-checklist.py
similarity index 99%
rename from .gitea/scripts/sop-checklist-gate.py
rename to .gitea/scripts/sop-checklist.py
index 995fbc7b..2b76911a 100644
--- a/.gitea/scripts/sop-checklist-gate.py
+++ b/.gitea/scripts/sop-checklist.py
@@ -1,11 +1,11 @@
 #!/usr/bin/env python3
-# sop-checklist-gate — evaluate whether a PR has peer-acked each
+# sop-checklist — evaluate whether a PR has peer-acked each
 # SOP-checklist item. Posts a commit-status that branch protection
 # can require.
 #
 # RFC#351 Step 2 of 6 (implementation MVP).
 #
-# Invoked by .gitea/workflows/sop-checklist-gate.yml on:
+# Invoked by .gitea/workflows/sop-checklist.yml on:
 #   - pull_request_target: [opened, edited, synchronize, reopened]
 #   - issue_comment:       [created, edited, deleted]
 #
diff --git a/.gitea/scripts/tests/test_sop_checklist_gate.py b/.gitea/scripts/tests/test_sop_checklist.py
similarity index 98%
rename from .gitea/scripts/tests/test_sop_checklist_gate.py
rename to .gitea/scripts/tests/test_sop_checklist.py
index 47ae4f23..24fbc54c 100644
--- a/.gitea/scripts/tests/test_sop_checklist_gate.py
+++ b/.gitea/scripts/tests/test_sop_checklist.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
-# Unit tests for sop-checklist-gate.py
+# Unit tests for sop-checklist.py
 #
-# Run:  python3 .gitea/scripts/tests/test_sop_checklist_gate.py
-#   or:  pytest .gitea/scripts/tests/test_sop_checklist_gate.py
+# Run:  python3 .gitea/scripts/tests/test_sop_checklist.py
+#   or:  pytest .gitea/scripts/tests/test_sop_checklist.py
 #
 # RFC#351 Step 2 of 6 — implementation MVP. Tests cover:
 #   - slug normalization (the 4 example variants in the script header)
@@ -33,7 +33,7 @@ sys.path.insert(0, PARENT)
 import importlib.util  # noqa: E402
 
 _spec = importlib.util.spec_from_file_location(
-    "sop_checklist_gate", os.path.join(PARENT, "sop-checklist-gate.py")
+    "sop_checklist", os.path.join(PARENT, "sop-checklist.py")
 )
 sop = importlib.util.module_from_spec(_spec)
 _spec.loader.exec_module(sop)  # type: ignore[union-attr]
diff --git a/.gitea/sop-checklist-config.yaml b/.gitea/sop-checklist-config.yaml
index 3b61605d..346d231f 100644
--- a/.gitea/sop-checklist-config.yaml
+++ b/.gitea/sop-checklist-config.yaml
@@ -111,7 +111,7 @@ items:
 # N/A gate declarations (RFC#324 §N/A follow-up).
 # PRs where a gate genuinely does not apply (e.g., pure-infra with no
 # qa surface, or docs-only) can be declared N/A by a non-author peer
-# who is in one of the gate's required_teams. The sop-checklist-gate
+# who is in one of the gate's required_teams. The sop-checklist
 # posts a `sop-checklist / na-declarations (pull_request)` status that
 # review-check.sh reads to skip the Gitea-APPROVE requirement.
 #
diff --git a/.gitea/workflows/publish-workspace-server-image.yml b/.gitea/workflows/publish-workspace-server-image.yml
index 25012dcf..02a42962 100644
--- a/.gitea/workflows/publish-workspace-server-image.yml
+++ b/.gitea/workflows/publish-workspace-server-image.yml
@@ -68,12 +68,14 @@ jobs:
           set -euo pipefail
           echo "::group::Docker daemon health check"
           echo "Runner: ${HOSTNAME:-unknown}"
-          docker info 2>&1 | head -5 || {
+          docker_info="$(docker info 2>&1)" || {
             echo "::error::Docker daemon is not accessible at /var/run/docker.sock"
             echo "::error::Runner: ${HOSTNAME:-unknown}"
+            printf '%s\n' "${docker_info}"
             echo "::error::Check: (1) daemon is running, (2) runner user is in docker group, (3) sock permissions are 660+"
             exit 1
           }
+          printf '%s\n' "${docker_info}" | sed -n '1,5p'
           echo "Docker daemon OK"
           echo "::endgroup::"
 
diff --git a/.gitea/workflows/review-refire-comments.yml b/.gitea/workflows/review-refire-comments.yml
index 97eb1371..c799c442 100644
--- a/.gitea/workflows/review-refire-comments.yml
+++ b/.gitea/workflows/review-refire-comments.yml
@@ -2,7 +2,7 @@
 #
 # Gitea 1.22 queues one run per workflow subscribed to `issue_comment` before
 # evaluating job-level `if:`. SOP-heavy PRs therefore created queue storms when
-# qa-review, security-review, sop-checklist-gate, and sop-tier-refire all
+# qa-review, security-review, sop-checklist, and sop-tier-refire all
 # listened to comments. This workflow is the single non-SOP comment subscriber:
 # ordinary comments no-op quickly; slash commands post the required status
 # contexts to the PR head SHA.
diff --git a/.gitea/workflows/sop-checklist-gate.yml b/.gitea/workflows/sop-checklist.yml
similarity index 91%
rename from .gitea/workflows/sop-checklist-gate.yml
rename to .gitea/workflows/sop-checklist.yml
index 3fd3ba81..fe86219f 100644
--- a/.gitea/workflows/sop-checklist-gate.yml
+++ b/.gitea/workflows/sop-checklist.yml
@@ -1,4 +1,4 @@
-# sop-checklist-gate — peer-ack merge gate for SOP-checklist items.
+# sop-checklist — peer-ack merge gate for SOP-checklist items.
 #
 # RFC#351 Step 2 of 6 (implementation MVP).
 #
@@ -65,7 +65,15 @@
 # membership, compute, post status). Re-running on any event is safe —
 # the new status overwrites the previous one for the same context.
 
-name: sop-checklist-gate
+name: sop-checklist
+
+# Cancel any in-progress runs for the same PR to prevent
+# stale runs from overwriting newer status contexts.
+concurrency:
+  group: ${{ github.repository }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+# bp-required: yes  ← emits sop-checklist / all-items-acked (pull_request)
 
 on:
   pull_request_target:
@@ -83,7 +91,7 @@ permissions:
   statuses: write
 
 jobs:
-  gate:
+  all-items-acked:
     # Run on pull_request_target events always. On issue_comment events,
     # only when the comment is on a PR (issue_comment fires for issues
     # too) and the body contains one of the slash-commands.
@@ -106,7 +114,7 @@ jobs:
           # qa-review.yml so the script source is always trusted.
           ref: ${{ github.event.repository.default_branch }}
 
-      - name: Run sop-checklist-gate
+      - name: Run sop-checklist
         env:
           GITEA_TOKEN: ${{ secrets.SOP_CHECKLIST_GATE_TOKEN || secrets.GITHUB_TOKEN }}
           PR_NUMBER: ${{ github.event.pull_request.number || github.event.issue.number }}
@@ -114,7 +122,7 @@ jobs:
           REPO_NAME: ${{ github.event.repository.name }}
         run: |
           set -euo pipefail
-          python3 .gitea/scripts/sop-checklist-gate.py \
+          python3 .gitea/scripts/sop-checklist.py \
             --owner "$OWNER" \
             --repo "$REPO_NAME" \
             --pr "$PR_NUMBER" \
diff --git a/tests/test_lint_workflow_yaml.py b/tests/test_lint_workflow_yaml.py
index 4cd4b151..18b67060 100644
--- a/tests/test_lint_workflow_yaml.py
+++ b/tests/test_lint_workflow_yaml.py
@@ -545,6 +545,70 @@ def test_rule9_prod_manual_deploy_allows_rollback_control(tmp_path):
     assert r.returncode == 0, f"stdout={r.stdout}\nstderr={r.stderr}"
 
 
+# ---------------------------------------------------------------------------
+# Rule 10 — docker info piped to head under pipefail
+# ---------------------------------------------------------------------------
+
+DOCKER_INFO_HEAD_BAD = """
+    name: docker-info-head-bad
+    on: [push]
+    jobs:
+      build:
+        runs-on: ubuntu-latest
+        steps:
+          - run: |
+              set -euo pipefail
+              docker info 2>&1 | head -5 || exit 1
+"""
+
+DOCKER_INFO_CAPTURE_OK = """
+    name: docker-info-capture-ok
+    on: [push]
+    jobs:
+      build:
+        runs-on: ubuntu-latest
+        steps:
+          - run: |
+              set -euo pipefail
+              docker_info="$(docker info 2>&1)" || exit 1
+              printf '%s\\n' "${docker_info}" | sed -n '1,5p'
+"""
+
+DOCKER_INFO_SEPARATE_STEP_OK = """
+    name: docker-info-separate-step-ok
+    on: [push]
+    jobs:
+      build:
+        runs-on: ubuntu-latest
+        steps:
+          - run: |
+              set -euo pipefail
+              echo setup
+          - run: |
+              docker info 2>&1 | head -5 || true
+"""
+
+
+def test_rule10_docker_info_head_under_pipefail_detects_violation(tmp_path):
+    _write(tmp_path, "bad.yml", DOCKER_INFO_HEAD_BAD)
+    r = _run_lint(tmp_path)
+    assert r.returncode == 1
+    assert "docker info" in r.stdout.lower()
+    assert "pipefail" in r.stdout.lower()
+
+
+def test_rule10_docker_info_capture_passes(tmp_path):
+    _write(tmp_path, "ok.yml", DOCKER_INFO_CAPTURE_OK)
+    r = _run_lint(tmp_path)
+    assert r.returncode == 0, f"stdout={r.stdout}\nstderr={r.stderr}"
+
+
+def test_rule10_docker_info_head_in_separate_step_without_pipefail_passes(tmp_path):
+    _write(tmp_path, "ok.yml", DOCKER_INFO_SEPARATE_STEP_OK)
+    r = _run_lint(tmp_path)
+    assert r.returncode == 0, f"stdout={r.stdout}\nstderr={r.stderr}"
+
+
 # ---------------------------------------------------------------------------
 # CI change detector fanout — workflow-only PRs keep required contexts without
 # running Go/Canvas/Python/shellcheck heavy steps.