diff --git a/okf/src/reference_agent/viewer/generator.py b/okf/src/reference_agent/viewer/generator.py
index 3e342d98..16a42d0c 100644
--- a/okf/src/reference_agent/viewer/generator.py
+++ b/okf/src/reference_agent/viewer/generator.py
@@ -71,10 +71,15 @@ def _extract_links(body: str, doc_dir: Path, bundle_root: Path) -> list[str]:
     bundle_root_resolved = bundle_root.resolve()
     for m in _LINK_RE.finditer(body):
         target = m.group(1)
-        if "://" in target or target.startswith("/"):
+        if "://" in target:
             continue
+        if target.startswith("/"):
+            # SPEC §6.1 absolute (bundle-relative) form: resolve from bundle root.
+            base = bundle_root_resolved / target.lstrip("/")
+        else:
+            base = doc_dir / target
         try:
-            resolved = (doc_dir / target).resolve().relative_to(bundle_root_resolved)
+            resolved = base.resolve().relative_to(bundle_root_resolved)
         except ValueError:
             continue
         rel = resolved.as_posix()
@@ -92,6 +97,10 @@ def _walk_concepts(bundle_root: Path) -> list[Concept]:
         if md_path.name == _INDEX_NAME:
             continue
         rel = md_path.relative_to(bundle_root).with_suffix("")
+        # Producer-internal state (.oknoll/ revision snapshots, .git/, …) is
+        # not bundle content; without this, every snapshot duplicates its node.
+        if any(part.startswith(".") for part in rel.parts):
+            continue
         concept_id = "/".join(rel.parts)
         try:
             doc = OKFDocument.parse(md_path.read_text(encoding="utf-8"))
diff --git a/okf/tests/test_viewer.py b/okf/tests/test_viewer.py
index 2d5e0b87..59f7fbd0 100644
--- a/okf/tests/test_viewer.py
+++ b/okf/tests/test_viewer.py
@@ -134,6 +134,52 @@ def test_cross_links_become_edges(tmp_path: Path):
     assert ("tables/events", "tables/users") in pairs
 
 
+def test_absolute_bundle_relative_links_become_edges(tmp_path: Path):
+    # SPEC §6.1: links beginning with "/" resolve from the bundle root and are
+    # the recommended cross-linking form.
+    bundle = tmp_path / "bundle"
+    _make_bundle(bundle)
+    _write(
+        bundle / "tables" / "orders.md",
+        """
+        ---
+        type: BigQuery Table
+        title: Orders
+        description: Orders, linked via bundle-root-absolute paths.
+        generated: {by: 'reference_agent/gemini', at: '2026-05-28T00:00:00+00:00'}
+        ---
+        Joins [users](/tables/users.md); metric in [DAU](/references/metrics/dau.md).
+        """,
+    )
+    out = tmp_path / "viz.html"
+    generate_visualization(bundle, out)
+    data = _extract_bundle_data(out.read_text(encoding="utf-8"))
+    pairs = {(e["data"]["source"], e["data"]["target"]) for e in data["edges"]}
+    assert ("tables/orders", "tables/users") in pairs
+    assert ("tables/orders", "references/metrics/dau") in pairs
+
+
+def test_absolute_links_cannot_escape_bundle_root(tmp_path: Path):
+    bundle = tmp_path / "bundle"
+    _write(
+        bundle / "tables" / "sneaky.md",
+        """
+        ---
+        type: BigQuery Table
+        title: Sneaky
+        description: Tries to link outside the bundle.
+        generated: {by: 'reference_agent/gemini', at: '2026-05-28T00:00:00+00:00'}
+        ---
+        Links [out](/../outside.md) and [up](../../outside.md).
+        """,
+    )
+    (tmp_path / "outside.md").write_text("---\ntype: X\n---\n", encoding="utf-8")
+    out = tmp_path / "viz.html"
+    generate_visualization(bundle, out)
+    data = _extract_bundle_data(out.read_text(encoding="utf-8"))
+    assert data["edges"] == []
+
+
 def test_missing_link_targets_are_skipped(tmp_path: Path):
     bundle = tmp_path / "bundle"
     _write(
@@ -155,6 +201,30 @@ def test_missing_link_targets_are_skipped(tmp_path: Path):
     assert len(data["nodes"]) == 1
 
 
+def test_hidden_directories_are_not_walked(tmp_path: Path):
+    bundle = tmp_path / "bundle"
+    _make_bundle(bundle)
+    # Producer-internal state (e.g. a revision snapshot) must not become nodes.
+    _write(
+        bundle / ".oknoll" / "revisions" / "rev-000000000001" / "tables" / "users.md",
+        """
+        ---
+        type: BigQuery Table
+        title: Users (snapshot)
+        description: Old revision snapshot.
+        generated: {by: 'reference_agent/gemini', at: '2026-05-01T00:00:00+00:00'}
+        ---
+        Stale copy.
+        """,
+    )
+    out = tmp_path / "viz.html"
+    generate_visualization(bundle, out)
+    data = _extract_bundle_data(out.read_text(encoding="utf-8"))
+    ids = {n["data"]["id"] for n in data["nodes"]}
+    assert len(ids) == 4
+    assert not any(i.startswith(".oknoll/") for i in ids)
+
+
 def test_node_colors_match_palette(tmp_path: Path):
     bundle = tmp_path / "bundle"
     _make_bundle(bundle)