diff --git a/README.md b/README.md
index fbbe6562..c694abfa 100644
--- a/README.md
+++ b/README.md
@@ -304,8 +304,10 @@ answer where the next decision is actually being made.
   objections) as Markdown or `QueueReport` v1 JSON; also a managed-issue Action.
 - **CI comment** — the `@adrkit/ci` GitHub Action surfaces the governing decisions
   on the PRs that touch or explicitly declare them; pattern matches render as `via`
-  and PR-authored marker claims as `declared by`. It runs with only the default `GITHUB_TOKEN` and
-  degrades (never fails the job) on a read-only fork token.
+  and PR-authored marker claims as `declared by`. The comment also distinguishes
+  marker files it could not inspect from marker claims it read but could not bind.
+  Both are advisory: they never fail the job. It runs with only the default
+  `GITHUB_TOKEN` and degrades (never fails the job) on a read-only fork token.
 - **MCP server** — let agents retrieve prior decisions, including the rejected
   ones, before proposing something already tried.
 
diff --git a/packages/ci/dist/index.js b/packages/ci/dist/index.js
index 5b330e83..cba9b5e5 100644
--- a/packages/ci/dist/index.js
+++ b/packages/ci/dist/index.js
@@ -48622,6 +48622,8 @@ var HISTORY_HEADING = "#### Historical records that once covered this change";
 var HISTORY_NOTE = "These no longer bind this change, and are listed for context only:";
 var MAX_GOVERNING = 50;
 var MAX_DECLARATIONS = 10;
+var MAX_MARKER_PATHS_PER_STATE = 10;
+var MAX_MARKER_CLAIMS = 20;
 var MAX_COMMENT_CHARS = 65536;
 var TRUNCATION_NOTICE = "- …output truncated to fit GitHub’s comment size limit; run `adr check` locally for the complete result.";
 var MAX_FINDING_FIELD_CHARS = 256;
@@ -48651,6 +48653,51 @@ function renderFindingLine(finding) {
   const message = boundedDetail(finding.message, MAX_FINDING_MESSAGE_CHARS, "message");
   return `- ${where} — ${code(finding.rule)}${field}: ${message}`;
 }
+function markerScanHealthLines(report) {
+  const states = [
+    ["absent", report.absentPaths],
+    ["unreadable", report.unreadablePaths],
+    ["out-of-tree", report.outOfTreePaths],
+    ["skipped at the scan cap", report.skippedPaths]
+  ];
+  const unavailable = states.reduce((total, [, paths]) => total + paths.length, 0);
+  if (unavailable === 0)
+    return [];
+  const lines = [
+    "#### Marker scan health",
+    "",
+    `Marker scanning could not inspect ${unavailable} changed file${unavailable === 1 ? "" : "s"}:`
+  ];
+  for (const [label, paths] of states) {
+    if (paths.length === 0)
+      continue;
+    const shown = paths.slice(0, MAX_MARKER_PATHS_PER_STATE).map(code).join(", ");
+    const remaining = paths.length - Math.min(paths.length, MAX_MARKER_PATHS_PER_STATE);
+    lines.push(`- ${paths.length} ${label}: ${shown}${remaining > 0 ? `, and ${remaining} more` : ""}`);
+  }
+  lines.push("", "These files could not be inspected for `@adr` markers; an empty result does not prove that no marker is present.");
+  return lines;
+}
+function markerClaimLines(outcome) {
+  const changed = new Set(outcome.changedFiles);
+  const claims = outcome.findings.filter((finding) => finding.field === "marker" && finding.path !== undefined && changed.has(finding.path) && finding.rule !== "marker-scan-capped");
+  if (claims.length === 0)
+    return [];
+  const shown = claims.slice(0, MAX_MARKER_CLAIMS);
+  const lines = [
+    "#### Marker claims not bound",
+    "",
+    "Marker scanning was healthy for these changed files, but the claims did not bind to a record in this corpus:"
+  ];
+  for (const finding of shown) {
+    lines.push(`- ${code(finding.path ?? "(unknown)")} — ${code(boundedDetail(finding.message, MAX_FINDING_MESSAGE_CHARS, "message"))}`);
+  }
+  const remaining = claims.length - shown.length;
+  if (remaining > 0) {
+    lines.push(`- …and ${remaining} more marker claim${remaining === 1 ? "" : "s"}`);
+  }
+  return lines;
+}
 function renderDecisionLines(decision, withStatus) {
   const status = withStatus ? ` _(${decision.status})_` : "";
   const successor = decision.supersededBy ? ` — superseded by **${decision.supersededBy}**` : "";
@@ -48708,6 +48755,14 @@ function renderComment(outcome) {
       lines.push(renderFindingLine(finding));
     lines.push("");
   }
+  if (outcome.markerScan) {
+    const markerAdvisories = [
+      ...markerScanHealthLines(outcome.markerScan),
+      ...markerClaimLines(outcome)
+    ];
+    if (markerAdvisories.length > 0)
+      lines.push(...markerAdvisories, "");
+  }
   if (outcome.governedBy.length === 0) {
     lines.push(EMPTY_STATE);
   } else if (outcome.governing.length === 0) {
diff --git a/packages/ci/src/comment.ts b/packages/ci/src/comment.ts
index 989740d9..0de955d8 100644
--- a/packages/ci/src/comment.ts
+++ b/packages/ci/src/comment.ts
@@ -33,6 +33,8 @@ const MAX_GOVERNING = 50;
 // window holds ~630 `// @adr 0021` lines, and the path in each is the author's too.
 // Bounding what is rendered is what keeps that content out of the body budget below.
 const MAX_DECLARATIONS = 10;
+const MAX_MARKER_PATHS_PER_STATE = 10;
+const MAX_MARKER_CLAIMS = 20;
 
 /**
  * GitHub rejects a comment body over 65,536 characters with a 422. That is not a
@@ -97,6 +99,63 @@ function renderFindingLine(finding: Finding): string {
   return `- ${where} — ${code(finding.rule)}${field}: ${message}`;
 }
 
+function markerScanHealthLines(report: NonNullable<CheckOutcome['markerScan']>): string[] {
+  const states: readonly [string, readonly string[]][] = [
+    ['absent', report.absentPaths],
+    ['unreadable', report.unreadablePaths],
+    ['out-of-tree', report.outOfTreePaths],
+    ['skipped at the scan cap', report.skippedPaths],
+  ];
+  const unavailable = states.reduce((total, [, paths]) => total + paths.length, 0);
+  if (unavailable === 0) return [];
+
+  const lines = [
+    '#### Marker scan health',
+    '',
+    `Marker scanning could not inspect ${unavailable} changed file${unavailable === 1 ? '' : 's'}:`,
+  ];
+  for (const [label, paths] of states) {
+    if (paths.length === 0) continue;
+    const shown = paths.slice(0, MAX_MARKER_PATHS_PER_STATE).map(code).join(', ');
+    const remaining = paths.length - Math.min(paths.length, MAX_MARKER_PATHS_PER_STATE);
+    lines.push(
+      `- ${paths.length} ${label}: ${shown}${remaining > 0 ? `, and ${remaining} more` : ''}`,
+    );
+  }
+  lines.push(
+    '',
+    'These files could not be inspected for `@adr` markers; an empty result does not prove that no marker is present.',
+  );
+  return lines;
+}
+
+function markerClaimLines(outcome: CheckOutcome): string[] {
+  const changed = new Set(outcome.changedFiles);
+  const claims = outcome.findings.filter(
+    (finding) =>
+      finding.field === 'marker' &&
+      finding.path !== undefined &&
+      changed.has(finding.path) &&
+      finding.rule !== 'marker-scan-capped',
+  );
+  if (claims.length === 0) return [];
+
+  const shown = claims.slice(0, MAX_MARKER_CLAIMS);
+  const lines = [
+    '#### Marker claims not bound',
+    '',
+    'Marker scanning was healthy for these changed files, but the claims did not bind to a record in this corpus:',
+  ];
+  for (const finding of shown) {
+    lines.push(`- ${code(finding.path ?? '(unknown)')} — ${code(boundedDetail(finding.message, MAX_FINDING_MESSAGE_CHARS, 'message'))}`);
+  }
+  const remaining = claims.length - shown.length;
+  if (remaining > 0) {
+    lines.push(`- …and ${remaining} more marker claim${remaining === 1 ? '' : 's'}`);
+  }
+  return lines;
+}
+
 /**
  * One decision as a bullet, annotated with its status and — for superseded records —
  * the successor that replaced it, so a reviewer is never shown a bare record id and
@@ -180,6 +239,14 @@ export function renderComment(outcome: CheckOutcome): string {
     lines.push('');
   }
 
+  if (outcome.markerScan) {
+    const markerAdvisories = [
+      ...markerScanHealthLines(outcome.markerScan),
+      ...markerClaimLines(outcome),
+    ];
+    if (markerAdvisories.length > 0) lines.push(...markerAdvisories, '');
+  }
+
   if (outcome.governedBy.length === 0) {
     lines.push(EMPTY_STATE);
   } else if (outcome.governing.length === 0) {
diff --git a/packages/ci/test/action.test.ts b/packages/ci/test/action.test.ts
index 9e41f8a7..593c0a27 100644
--- a/packages/ci/test/action.test.ts
+++ b/packages/ci/test/action.test.ts
@@ -156,7 +156,7 @@ describe('runAction (end to end with a fake client)', () => {
     expect(result.outcome?.governing.map((decision) => decision.recordId)).toEqual(['0001']);
   });
 
-  test('keeps dangling markers non-failing and out of the focused PR comment', async () => {
+  test('reports dangling markers without making them failing', async () => {
     const root = await resetTestDir(DIR_NAME);
     await mkdir(join(root, 'docs/adr'), { recursive: true });
     await writeText(join(root, 'src/dangling.ts'), '// @adr 9999\n');
@@ -167,7 +167,8 @@ describe('runAction (end to end with a fake client)', () => {
     expect(result.failed).toBe(false);
     expect(result.outcome?.ok).toBe(true);
     expect(result.outcome?.findings.map((finding) => finding.rule)).toContain('dangling-marker');
-    expect(client.created[0]).not.toContain('dangling-marker');
+    expect(client.created[0]).toContain('#### Marker claims not bound');
+    expect(client.created[0]).toContain('@adr 9999');
   });
 
   test('warns with the exact skipped paths when the marker scan cap is reached', async () => {
diff --git a/packages/ci/test/comment-render.test.ts b/packages/ci/test/comment-render.test.ts
index aabe68b9..da8be42b 100644
--- a/packages/ci/test/comment-render.test.ts
+++ b/packages/ci/test/comment-render.test.ts
@@ -79,22 +79,116 @@ describe('renderComment', () => {
     expect(body).not.toContain('**0002**');
   });
 
-  test('keeps marker reference warnings out of the focused PR comment', async () => {
+  test('separates marker scan health from the empty governing state', async () => {
     const root = await seed();
-    const outcome = await outcomeFor(root, ['docs/adr/0001-api.md']);
+    const outcome = await outcomeFor(root, ['src/a.ts']);
+    outcome.markerScan = {
+      totalCandidates: 1,
+      limit: 3000,
+      counts: { scanned: 0, absent: 1, unreadable: 0, 'out-of-tree': 0, truncated: 0, skipped: 0 },
+      absentPaths: ['src/a.ts'],
+      unreadablePaths: [],
+      outOfTreePaths: [],
+      truncatedPaths: [],
+      skippedPaths: [],
+    };
+
+    const body = renderComment(outcome);
+
+    expect(body).toContain(
+      'no marker is present.\n\nNo governing decisions for the changed files.',
+    );
+  });
+
+  test('reports a dangling marker after a healthy scan without making it blocking', async () => {
+    const root = await seed();
+    const outcome = await outcomeFor(root, ['src/owned.ts']);
     outcome.findings.push({
       rule: 'dangling-marker',
       severity: 'warn',
-      message: 'Source marker does not resolve',
-      path: 'docs/adr/0001-api.md',
+      message: 'Source marker "@adr 9999" in src/owned.ts:1 does not resolve to a record in the corpus',
+      path: 'src/owned.ts',
       field: 'marker',
       pattern: '9999',
     });
+    outcome.markerScan = {
+      totalCandidates: 1,
+      limit: 3000,
+      counts: { scanned: 1, absent: 0, unreadable: 0, 'out-of-tree': 0, truncated: 0, skipped: 0 },
+      absentPaths: [],
+      unreadablePaths: [],
+      outOfTreePaths: [],
+      truncatedPaths: [],
+      skippedPaths: [],
+    };
 
     const body = renderComment(outcome);
 
-    expect(body).not.toContain('dangling-marker');
-    expect(body).not.toContain('Source marker does not resolve');
+    expect(body).toContain('#### Marker claims not bound');
+    expect(body).toContain('src/owned.ts');
+    expect(body).toContain('@adr 9999');
+    expect(body).not.toContain('#### Marker scan health');
+  });
+
+  test('reports files the marker scan could not inspect, with bounded safe paths', async () => {
+    const root = await seed();
+    const outcome = await outcomeFor(root, ['src/a.ts']);
+    const paths = Array.from({ length: 12 }, (_, index) => `src/${index}-\`[x](https://evil.example).ts`);
+    outcome.changedFiles = paths;
+    outcome.markerScan = {
+      totalCandidates: paths.length,
+      limit: 3000,
+      counts: { scanned: 0, absent: 12, unreadable: 0, 'out-of-tree': 0, truncated: 0, skipped: 0 },
+      absentPaths: paths,
+      unreadablePaths: [],
+      outOfTreePaths: [],
+      truncatedPaths: [],
+      skippedPaths: [],
+    };
+
+    const body = renderComment(outcome);
+
+    expect(body).toContain('#### Marker scan health');
+    expect(body).toContain('could not inspect 12 changed files');
+    expect(body).toContain('and 2 more');
+    expect(body).toContain('``src/0-');
+    expect(body).not.toContain('- `src/0-');
+  });
+
+  test('keeps changed-record validation errors ahead of marker reports under the body budget', async () => {
+    const root = await seed();
+    const outcome = await outcomeFor(root, ['docs/adr/0001-api.md']);
+    outcome.changedRecords = ['docs/adr/broken.md'];
+    outcome.findings = [{
+      rule: 'frontmatter-parse',
+      severity: 'error',
+      message: 'broken record',
+      path: 'docs/adr/broken.md',
+    }];
+    outcome.markerScan = {
+      totalCandidates: 1,
+      limit: 3000,
+      counts: { scanned: 0, absent: 1, unreadable: 0, 'out-of-tree': 0, truncated: 0, skipped: 0 },
+      absentPaths: ['src/a.ts'],
+      unreadablePaths: [],
+      outOfTreePaths: [],
+      truncatedPaths: [],
+      skippedPaths: [],
+    };
+    outcome.findings.push(...Array.from({ length: 4000 }, (_, index) => ({
+      rule: 'dangling-marker',
+      severity: 'warn' as const,
+      message: `claim ${index} ${'x'.repeat(60)}`,
+      path: 'src/a.ts',
+      field: 'marker',
+      pattern: '9999',
+    })));
+
+    const body = renderComment(outcome);
+
+    expect(body.length).toBeLessThanOrEqual(65536);
+    expect(body).toContain('Validation errors on changed records');
+    expect(body).toContain('docs/adr/broken.md');
   });
 });
 
@@ -120,7 +214,26 @@ describe('renderComment status awareness (#39)', () => {
 
   test('only accepted records appear under the governing heading', async () => {
     const root = await seedMixed();
-    const body = renderComment(await outcomeFor(root, ['src/api/thing.ts']));
+    const outcome = await outcomeFor(root, ['src/api/thing.ts']);
+    outcome.markerScan = {
+      totalCandidates: 1,
+      limit: 3000,
+      counts: { scanned: 1, absent: 0, unreadable: 0, 'out-of-tree': 0, truncated: 0, skipped: 0 },
+      absentPaths: [],
+      unreadablePaths: [],
+      outOfTreePaths: [],
+      truncatedPaths: [],
+      skippedPaths: [],
+    };
+    outcome.findings.push({
+      rule: 'dangling-marker',
+      severity: 'warn',
+      message: 'Source marker "@adr 9999" in src/api/thing.ts:1 does not resolve',
+      path: 'src/api/thing.ts',
+      field: 'marker',
+      pattern: '9999',
+    });
+    const body = renderComment(outcome);
 
     const governingSection = body.slice(
       body.indexOf('### Decisions governing this change'),
@@ -129,6 +242,9 @@ describe('renderComment status awareness (#39)', () => {
     expect(governingSection).toContain('**0001** — Accepted record');
     expect(governingSection).not.toContain('0002');
     expect(governingSection).not.toContain('0003');
+    expect(body).toContain(
+      '- `src/api/thing.ts` — `Source marker "@adr 9999" in src/api/thing.ts:1 does not resolve`\n\n- **0001** — Accepted record',
+    );
   });
 
   test('proposals and history are labelled with their status under their own headings', async () => {
diff --git a/site/src/content/docs/ci.mdx b/site/src/content/docs/ci.mdx
index 409aca8b..fa97d529 100644
--- a/site/src/content/docs/ci.mdx
+++ b/site/src/content/docs/ci.mdx
@@ -43,6 +43,17 @@ The Action updates its existing comment on later pushes, so each pull request
 keeps one current governing-decisions comment. No additional token environment
 variable is required when using the default `GITHUB_TOKEN`.
 
+The comment reports marker results separately from governing decisions. **Marker
+scan health** lists changed files that could not be inspected (`absent`,
+`unreadable`, `out-of-tree`, or skipped at the scan cap), so an empty marker
+result is not mistaken for a healthy scan. **Marker claims not bound** lists
+`@adr` claims that were read successfully but did not resolve in this corpus.
+Both sections are bounded and advisory: they never affect the Action's exit
+status, and changed-record validation errors retain priority if the comment
+reaches GitHub's size limit. Keep the default checkout rooted at
+`GITHUB_WORKSPACE`; if a workflow checks out elsewhere, marker health will
+identify files the Action could not inspect.
+
 `v0` is a moving major tag, and it now resolves to a `v0.11.0` build. Pin the
 immutable `v0.11.0` tag or a commit SHA for maximum reproducibility.