diff --git a/package.json b/package.json
index 18dc8dba4f..0637f8f320 100644
--- a/package.json
+++ b/package.json
@@ -65,6 +65,8 @@
     "ui:version-audit": "node scripts/check-ui-mcp-version-copy.mjs",
     "ui:version-audit:sync": "node scripts/check-ui-mcp-version-copy.mjs --write",
     "docs:drift-check": "node scripts/check-docs-drift.mjs",
+    "branding-drift:check": "node scripts/check-branding-drift.mjs",
+    "branding-drift:update": "node scripts/check-branding-drift.mjs --update",
     "manifest:drift-check": "tsx scripts/check-manifest-drift.mjs",
     "engine-parity:drift-check": "tsx scripts/check-engine-parity.ts",
     "ui:deploy": "npm run ui:build && npm run ui:deploy:built",
@@ -94,7 +96,7 @@
     "test:smoke:observability:metrics": "node scripts/smoke-observability-metrics.mjs",
     "test:smoke:browser:install": "playwright install chromium",
     "test:smoke:browser": "node scripts/smoke-ui-browser.mjs",
-    "test:ci": "git diff --check && npm run actionlint && npm run db:migrations:check && npm run db:schema-drift:check && npm run selfhost:env-reference:check && npm run miner:env-reference:check && npm run selfhost:validate-observability && npm run cf-typegen:check && npm run build --workspace @loopover/engine && npm run typecheck && npm run test:coverage && npm run test:engine-parity && npm run test:live-gate-parity && npm run test:driver-parity && npm run test --workspace @loopover/engine && npm run test:workers && npm run build:mcp && npm run test:mcp-pack && npm run build:miner && npm run test:miner-pack && npm run test:miner-deployment-docs-audit && npm run rees:test && npm run ui:openapi:check && npm run ui:openapi:settings-parity && npm run ui:version-audit && npm run docs:drift-check && npm run manifest:drift-check && npm run engine-parity:drift-check && npm run command-reference:check && npm run ui:lint && npm run ui:typecheck && npm run ui:test && npm run ui:build",
+    "test:ci": "git diff --check && npm run actionlint && npm run db:migrations:check && npm run db:schema-drift:check && npm run selfhost:env-reference:check && npm run miner:env-reference:check && npm run selfhost:validate-observability && npm run cf-typegen:check && npm run build --workspace @loopover/engine && npm run typecheck && npm run test:coverage && npm run test:engine-parity && npm run test:live-gate-parity && npm run test:driver-parity && npm run test --workspace @loopover/engine && npm run test:workers && npm run build:mcp && npm run test:mcp-pack && npm run build:miner && npm run test:miner-pack && npm run test:miner-deployment-docs-audit && npm run rees:test && npm run ui:openapi:check && npm run ui:openapi:settings-parity && npm run ui:version-audit && npm run docs:drift-check && npm run branding-drift:check && npm run manifest:drift-check && npm run engine-parity:drift-check && npm run command-reference:check && npm run ui:lint && npm run ui:typecheck && npm run ui:test && npm run ui:build",
     "test:release": "npm run test:ci && npm run changelog:check",
     "test:release:mcp": "npm run test:ci",
     "test:watch": "vitest",
diff --git a/scripts/branding-drift-baseline.json b/scripts/branding-drift-baseline.json
new file mode 100644
index 0000000000..545dc4c1de
--- /dev/null
+++ b/scripts/branding-drift-baseline.json
@@ -0,0 +1,38 @@
+{
+  "packages/loopover-engine/src/signals/engine.ts": 2,
+  "packages/loopover-mcp/bin/loopover-mcp.js": 5,
+  "src/api/routes.ts": 3,
+  "src/db/repositories.ts": 1,
+  "src/github/app.ts": 11,
+  "src/github/backfill.ts": 7,
+  "src/github/commands.ts": 2,
+  "src/github/comments.ts": 3,
+  "src/integrations/project-tracker-adapter.ts": 1,
+  "src/orb/federated-bundle.ts": 1,
+  "src/queue/processors.ts": 6,
+  "src/review/check-names.ts": 8,
+  "src/review/contributor-calibration.ts": 2,
+  "src/review/enrichment-analyzers-taxonomy.ts": 1,
+  "src/review/enrichment-wire.ts": 1,
+  "src/review/ops-wire.ts": 3,
+  "src/review/outcomes-wire.ts": 2,
+  "src/review/parity-wire.ts": 9,
+  "src/review/planner.ts": 1,
+  "src/review/rag.ts": 3,
+  "src/review/repo-doc-render.ts": 2,
+  "src/review/repo-skill-render.ts": 2,
+  "src/review/selftune-wire.ts": 1,
+  "src/selfhost/ai.ts": 6,
+  "src/selfhost/health.ts": 3,
+  "src/selfhost/monitored-work.ts": 1,
+  "src/selfhost/orb-collector.ts": 1,
+  "src/selfhost/sentry.ts": 2,
+  "src/services/ai-review.ts": 4,
+  "src/services/ai-slop.ts": 1,
+  "src/services/ai-summaries.ts": 1,
+  "src/services/contributor-issue-draft.ts": 2,
+  "src/services/merge-failure.ts": 1,
+  "src/services/notify-pagerduty.ts": 2,
+  "src/upstream/ruleset.ts": 3,
+  "src/utils/crypto.ts": 1
+}
diff --git a/scripts/check-branding-drift.d.mts b/scripts/check-branding-drift.d.mts
new file mode 100644
index 0000000000..a91efa047f
--- /dev/null
+++ b/scripts/check-branding-drift.d.mts
@@ -0,0 +1,9 @@
+export const BASELINE_RELATIVE_PATH: string;
+export const BRANDING_DRIFT_PATHSPECS: string[];
+
+export function scanBrandingHits(options: {
+  root: string;
+  exec?: (root: string, args: string[]) => string;
+}): Record<string, number>;
+
+export function diffBrandingBaseline(baseline: Record<string, number>, current: Record<string, number>): string[];
diff --git a/scripts/check-branding-drift.mjs b/scripts/check-branding-drift.mjs
new file mode 100644
index 0000000000..d31ff96dd9
--- /dev/null
+++ b/scripts/check-branding-drift.mjs
@@ -0,0 +1,123 @@
+#!/usr/bin/env node
+// Guards against the "gittensory" branding silently creeping back into runtime source after the LoopOver
+// rebrand -- distinct from docs/prose residue (already owned by the ongoing rebrand-sweep PR series), this
+// targets the class of bug that actually broke things: a hardcoded metric name, MCP resource URI, or Qdrant
+// collection default left on the pre-rebrand string. That exact pattern caused live drift more than once
+// (e.g. #6786 -- ENRICHMENT_ANALYZERS_URI silently left as "gittensory://enrichment-analyzers" while its
+// sibling FINDING_TAXONOMY_URI was correctly renamed in the same PR). Scoped to executable code in `src/**`
+// and each workspace package's `bin/`, `lib/`, `src/`, `scripts/` dirs -- NOT `test/**` or `*.md`, where a
+// literal "gittensory" is usually an intentional, permanent historical reference (a Sentry ticket ID like
+// GITTENSORY-K/8, a stable comment-marker the bot must keep matching in already-posted PR bodies, a DB
+// `source` column value joined against historical rows) rather than drift; those files churn constantly and
+// would make this check pure noise if included.
+//
+// Baseline-diff, not a hard "zero gittensory" ban: scripts/branding-drift-baseline.json snapshots today's
+// known-legitimate per-file hit count (grandfathered, same shape as KNOWN_MIGRATION_DUPLICATES in
+// src/db/migration-collisions.ts). A file's count rising means new drift; falling means a cleanup landed
+// without updating the baseline. Either way the fix is the same: run `npm run branding-drift:update` and
+// commit the regenerated baseline -- mirrors this repo's existing generated-artifact convention (openapi.json,
+// cf-typegen, migrations) rather than inventing a new one.
+import { execFileSync } from "node:child_process";
+import { readFileSync, writeFileSync } from "node:fs";
+import { join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+export const BASELINE_RELATIVE_PATH = "scripts/branding-drift-baseline.json";
+
+// git pathspecs: executable code only. Each workspace package's bin/lib/src/scripts dirs mirror the
+// top-level src/** scope; docs/README/CHANGELOG/schema/terraform/css and every test dir are deliberately
+// excluded (see header comment).
+export const BRANDING_DRIFT_PATHSPECS = [
+  "src/**/*.ts",
+  "src/**/*.tsx",
+  "packages/*/bin/**",
+  "packages/*/lib/**/*.js",
+  "packages/*/lib/**/*.ts",
+  "packages/*/src/**/*.ts",
+  "packages/*/scripts/**/*.mjs",
+  ":(exclude)**/*.test.ts",
+  ":(exclude)**/*.test.tsx",
+  ":(exclude)packages/*/test/**",
+];
+
+function defaultExec(root, args) {
+  try {
+    return execFileSync("git", args, { cwd: root, encoding: "utf8" });
+  } catch (error) {
+    // git grep exits 1 for "zero matches" -- not a real failure, just an empty result.
+    if (error.status === 1) return "";
+    throw error;
+  }
+}
+
+/** Every tracked, non-excluded file with >=1 case-insensitive "gittensory" MATCHING LINE, and that line
+ *  count (line-granularity, not raw occurrence count -- sufficient to detect "something new appeared" without
+ *  the fragility of an exact substring-occurrence count). Uses `git grep`, so it only ever sees tracked files
+ *  exactly as CI would check them out -- no node_modules/dist/build noise to exclude by hand. */
+export function scanBrandingHits({ root, exec = defaultExec }) {
+  const output = exec(root, ["grep", "-ciI", "gittensory", "--", ...BRANDING_DRIFT_PATHSPECS]);
+  const counts = {};
+  for (const line of output.split("\n")) {
+    if (!line) continue;
+    const separatorIndex = line.lastIndexOf(":");
+    const file = line.slice(0, separatorIndex);
+    counts[file] = Number(line.slice(separatorIndex + 1));
+  }
+  return counts;
+}
+
+/** Pure comparison: every failure is one of "increased" (new drift -- or a file that didn't exist in the
+ *  baseline at all, same failure shape) or "decreased" (a cleanup landed; still a failure so the baseline
+ *  never silently drifts stale, but a one-line fix -- regenerate). Sorted for stable, reviewable CI output. */
+export function diffBrandingBaseline(baseline, current) {
+  const failures = [];
+  const files = new Set([...Object.keys(baseline), ...Object.keys(current)]);
+  for (const file of [...files].sort()) {
+    const before = baseline[file] ?? 0;
+    const after = current[file] ?? 0;
+    if (after > before) {
+      failures.push(
+        `${file}: "gittensory" mentions increased from ${before} to ${after} -- looks like new branding drift, not an intentional historical reference. If it genuinely belongs (e.g. a permanent Sentry ticket ID or a stable comment-marker already posted to live PRs), run \`npm run branding-drift:update\` and commit the regenerated baseline.`,
+      );
+    } else if (after < before) {
+      failures.push(
+        `${file}: "gittensory" mentions decreased from ${before} to ${after} -- looks like a cleanup landed without regenerating the baseline. Run \`npm run branding-drift:update\` and commit the result.`,
+      );
+    }
+  }
+  return failures;
+}
+
+function readBaseline(root) {
+  return JSON.parse(readFileSync(join(root, BASELINE_RELATIVE_PATH), "utf8"));
+}
+
+function writeBaseline(root, counts) {
+  const sorted = Object.fromEntries(Object.entries(counts).sort(([a], [b]) => a.localeCompare(b)));
+  writeFileSync(join(root, BASELINE_RELATIVE_PATH), `${JSON.stringify(sorted, null, 2)}\n`);
+}
+
+function main() {
+  const root = process.cwd();
+  const update = process.argv.includes("--update");
+  const current = scanBrandingHits({ root });
+
+  if (update) {
+    writeBaseline(root, current);
+    console.log(`Branding-drift baseline regenerated: ${Object.keys(current).length} file(s) with a "gittensory" reference.`);
+    return;
+  }
+
+  const baseline = readBaseline(root);
+  const failures = diffBrandingBaseline(baseline, current);
+
+  if (failures.length > 0) {
+    console.error(`Branding-drift check found ${failures.length} issue(s):`);
+    for (const failure of failures) console.error(failure);
+    process.exit(1);
+  }
+
+  console.log(`Branding-drift check ok: ${Object.keys(current).length} file(s) match the recorded baseline.`);
+}
+
+if (process.argv[1] === fileURLToPath(import.meta.url)) main();
diff --git a/test/unit/check-branding-drift-script.test.ts b/test/unit/check-branding-drift-script.test.ts
new file mode 100644
index 0000000000..b0173c1d8b
--- /dev/null
+++ b/test/unit/check-branding-drift-script.test.ts
@@ -0,0 +1,108 @@
+import { execFileSync } from "node:child_process";
+import { describe, expect, it } from "vitest";
+import { diffBrandingBaseline, scanBrandingHits } from "../../scripts/check-branding-drift.mjs";
+
+describe("scanBrandingHits", () => {
+  it("parses git grep -c output into a { file: count } map", () => {
+    const exec = () => "src/a.ts:2\nsrc/b.ts:1\n";
+    const result = scanBrandingHits({ root: "/fake", exec });
+
+    expect(result).toEqual({ "src/a.ts": 2, "src/b.ts": 1 });
+  });
+
+  it("returns an empty map when there is no output (git grep found nothing)", () => {
+    const exec = () => "";
+    const result = scanBrandingHits({ root: "/fake", exec });
+
+    expect(result).toEqual({});
+  });
+
+  it("uses the LAST colon as the file/count separator, so a path containing a colon still parses", () => {
+    const exec = () => "src/weird:name.ts:3\n";
+    const result = scanBrandingHits({ root: "/fake", exec });
+
+    expect(result).toEqual({ "src/weird:name.ts": 3 });
+  });
+
+  it("passes the branding-drift pathspecs through to the injected exec", () => {
+    let capturedArgs: string[] = [];
+    const exec = (_root: string, args: string[]) => {
+      capturedArgs = args;
+      return "";
+    };
+    scanBrandingHits({ root: "/fake", exec });
+
+    expect(capturedArgs[0]).toBe("grep");
+    expect(capturedArgs).toContain("src/**/*.ts");
+    expect(capturedArgs).toContain(":(exclude)**/*.test.ts");
+  });
+
+  // Real regression guard, mirroring check-manifest-drift-script.test.ts's own real-repo-state test: proves
+  // the actual defaultExec (real `git grep` subprocess, real exit-1-means-empty handling) works against this
+  // repo's real tracked files, not just the injected fake above.
+  it("runs the real git grep against this repo without throwing", () => {
+    const result = scanBrandingHits({ root: process.cwd() });
+
+    expect(typeof result).toBe("object");
+    for (const count of Object.values(result)) {
+      expect(count).toBeGreaterThan(0);
+    }
+  });
+});
+
+describe("diffBrandingBaseline", () => {
+  it("reports no failures when baseline and current match exactly", () => {
+    const failures = diffBrandingBaseline({ "src/a.ts": 2 }, { "src/a.ts": 2 });
+
+    expect(failures).toEqual([]);
+  });
+
+  it("flags a file whose count increased (new drift)", () => {
+    const failures = diffBrandingBaseline({ "src/a.ts": 1 }, { "src/a.ts": 2 });
+
+    expect(failures).toHaveLength(1);
+    expect(failures[0]).toContain("src/a.ts");
+    expect(failures[0]).toContain("increased from 1 to 2");
+    expect(failures[0]).toContain("branding-drift:update");
+  });
+
+  it("flags a brand-new file not present in the baseline at all (increased from 0)", () => {
+    const failures = diffBrandingBaseline({}, { "src/new.ts": 1 });
+
+    expect(failures).toHaveLength(1);
+    expect(failures[0]).toContain("increased from 0 to 1");
+  });
+
+  it("flags a file whose count decreased (stale baseline after a cleanup)", () => {
+    const failures = diffBrandingBaseline({ "src/a.ts": 3 }, { "src/a.ts": 1 });
+
+    expect(failures).toHaveLength(1);
+    expect(failures[0]).toContain("decreased from 3 to 1");
+  });
+
+  it("flags a file removed entirely from current (decreased to 0)", () => {
+    const failures = diffBrandingBaseline({ "src/gone.ts": 2 }, {});
+
+    expect(failures).toHaveLength(1);
+    expect(failures[0]).toContain("decreased from 2 to 0");
+  });
+
+  it("reports one failure per affected file, sorted, when several files differ", () => {
+    const failures = diffBrandingBaseline({ "src/b.ts": 1, "src/a.ts": 1 }, { "src/b.ts": 2, "src/a.ts": 2 });
+
+    expect(failures).toHaveLength(2);
+    expect(failures[0]).toContain("src/a.ts");
+    expect(failures[1]).toContain("src/b.ts");
+  });
+});
+
+describe("check-branding-drift script (real repo state)", () => {
+  // Most important test in this file: proves the checked-in baseline actually matches the real repo right
+  // now. If this fails, real drift landed (or a cleanup did) without regenerating the baseline -- either way,
+  // fix it with `npm run branding-drift:update`, don't weaken this test.
+  it("the committed baseline matches the real current repo state (regression guard)", () => {
+    const output = execFileSync("node", ["scripts/check-branding-drift.mjs"], { encoding: "utf8" });
+
+    expect(output).toMatch(/Branding-drift check ok: \d+ file\(s\) match the recorded baseline\./);
+  });
+});