diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 94b8ae7..ba88356 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -62,10 +62,15 @@ jobs:
           bin/cgo/zig go build -tags system_ladybug -o /tmp/brain-search ./bin/brain/search.go
           bin/cgo/zig go build -tags 'system_ladybug,brain_eval' -o /tmp/brain-eval ./bin/brain/eval.go
 
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/huggingface
+          key: ${{ runner.os }}-hf-potion-multilingual-128M
+
       - name: recall@5 SoT (Zig bin/brain/eval.go)
         run: |
           uv run python bin/kb/index --rebuild --json
-          /tmp/brain-eval --json
+          KB_ROOT="$PWD" /tmp/brain-eval --json
 
   release:
     name: Release (semver)
diff --git a/README.md b/README.md
index 70ea26a..fa01fb7 100644
--- a/README.md
+++ b/README.md
@@ -169,6 +169,9 @@ docker compose up brain-watch                  # auto re-index on change
 
 ## Related
 
+eSlider DevOps engineer practice: ops, OnlyOffice, and mail feed the facts
+root through `bin/facts/extract` (two-source pairing).
+
 - [go-second-brain](https://github.com/eSlider/go-second-brain) — the earlier
   Neo4j + Qdrant + Matrix RAG brain
 - [agent-skills](https://github.com/eSlider/agent-skills) — upstream
diff --git a/bin/tools/test_bin_layout.py b/bin/tools/test_bin_layout.py
index 382934c..babd886 100644
--- a/bin/tools/test_bin_layout.py
+++ b/bin/tools/test_bin_layout.py
@@ -213,6 +213,19 @@ class BinLayoutTest(unittest.TestCase):
         self.assertIn("bin/brain/eval.go", ci)
         self.assertIn("system_ladybug,brain_eval", ci)
         self.assertIn("/tmp/brain-eval", ci)
+        self.assertIn("KB_ROOT", ci)
         self.assertNotIn("bin/kb/eval", ci)
         self.assertNotIn("gate skipped", ci)
         self.assertIn("./bin/facts/audit self", ci)
+
+    def test_eval_fragments_live_in_default_corpus(self) -> None:
+        """CI --rebuild indexes README/PLAN/docs/skills; fragments must be there."""
+        corpus = []
+        for rel in ("README.md", "PLAN.md", "AGENTS.md"):
+            corpus.append((ROOT / rel).read_text())
+        for d in ("docs", "skills"):
+            for p in (ROOT / d).rglob("*.md"):
+                corpus.append(p.read_text())
+        blob = "\n".join(corpus)
+        for frag in ("BM25", "DevOps", "LadybugDB"):
+            self.assertIn(frag, blob, f"{frag} must appear in default index corpus")