diff --git a/CHECK-ledger-dir-census b/CHECK-ledger-dir-census
new file mode 100755
index 0000000..eb243b6
--- /dev/null
+++ b/CHECK-ledger-dir-census
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+# CHECK -- ledger dir census (forge: extract lane). Exit 0 iff committed
+# wizard-work/ledger/2026-10-30-ledger-dir-census.csv matches a fresh
+# re-derivation from the live filesystem.
+set -u
+cd "$(dirname "${BASH_SOURCE[0]}")" || exit 1
+REPO_ROOT="$(pwd)"
+cd "$REPO_ROOT" || exit 1
+exec python3 wizard-work/ledger/verify_ledger_dir_census.py
diff --git a/wizard-work/ledger/2026-10-30-ledger-dir-census.csv b/wizard-work/ledger/2026-10-30-ledger-dir-census.csv
new file mode 100644
index 0000000..0d3e477
--- /dev/null
+++ b/wizard-work/ledger/2026-10-30-ledger-dir-census.csv
@@ -0,0 +1,526 @@
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+wizard-work/ledger/verify_github_python_repos.py,4938,51451e7fb328386349a2256c7407953b2444acc8e37779d3fc07dfe03e4eb138
+wizard-work/ledger/verify_github_repos.py,5994,29720c9b21ffec1602e483f04a6ea8e7413907c696a5ec3b84626af94f86f35a
+wizard-work/ledger/verify_issues.py,2795,2392acdcaa195bbd29647239a30951ba2dda8157669d0433e6e47b81ab3f1d51
+wizard-work/ledger/verify_ledger_census.py,6527,eaf5948375118e4679799962c6c6680605112aede5d73bfe1074c20c74fdcf17
+wizard-work/ledger/verify_ledger_dir_census.py,2323,fa86fee3bef22deffed438705b17ae7056133a0190b0d2f4a15719e04e6cbbdd
+wizard-work/ledger/verify_python_org_repos.py,3574,d4b54fb916cb44a70b4a46fccd42cfaed988c3a59ba1ac444f2134affa4798b7
+wizard-work/ledger/verify_replies_catalog.py,1924,e6e009994de217e782ea310679fa96bc4a23d23599d4ab585f2c3158302d3449
+wizard-work/ledger/verify_reply_volume_census.py,4328,a7ff77226fed80fd4695e7a70572030380e956d2eccc22727a0dc9463a5c823a
+wizard-work/ledger/verify_stackchain_catalog.py,5744,9d662eaa75064019634cdbe4baabb2e3880ba559a7c6072ad1c4e825c32438c7
+wizard-work/ledger/verify_tree_census.py,3612,8ecabf20c1779b4398e0abc61ac7f95d8fb853bed48bbf9313c6a4391ef57fea
+wizard-work/ledger/verify_users.py,1954,f2b8b1cb7965a35e8b69788c6ad13a71733e1f7e35b256e6e8bbf40e0d83d63a
+wizard-work/ledger/verify_wizard_roster_2026-10-29.py,5106,b8f432eddc1cd40d001085057cf7113d3cbca586fb0def983bca8d4c024dfcb7
+wizard-work/ledger/verify_wizards.py,13966,465de88bb39b7941227b010a64cd5741fcc1c52c40d4e21f929ad31fc34f02f2
+wizard-work/ledger/verify_wizards.sh,432,2d997be230cd5a837373f4a3e55e0bb193d5cbebf79eb3c1e60d402bde1830a0
+wizard-work/ledger/verify_workflow.py,1824,b741576dd6995ba8f712789cdf2d690657d5a9427066fec17f2689c1dfdd8c8a
+wizard-work/ledger/wizard-roster.csv,4767,beb1ff57ea4e2921f8f4bf040bda7f2b962c9bdef4f6766cb3598f89c714f988
+wizard-work/ledger/wizard-work-census-2026-10-27.md,1391,f6719d9c8ee706866672a2c6addd45a32f026fc5e2caf504fa0bedddb74c4f3b
+wizard-work/ledger/wizard-work-census-2026-10-27.tsv,208,7aafe143456d4cc0dc16785736cb8b08898f57352f8593e073541bf8744ce19f
+wizard-work/ledger/wizard_inventory.csv,990,a4fd00ee3e8a1399db35e43f854542c0f6f4633b0ba66143a0926f62c659b4a0
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+wizard-work/ledger/wizards-notebook.md,2813,cf32da6cce294bb3fbaba5d45cca439665fdbe25d9c8835741dca25ac128010c
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+wizard-work/ledger/wizardwork-file-manifest.tsv,270259,6d74dca762d2231f1808606f54440cff10e77664b8ae743104435caa8514234e
+wizard-work/ledger/workflow.md,7629,3dea22a6fee4f06b15e11dbe976f87cab097211cfbd154680614df62696ca3cf
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+wizard-work/ledger/workqueue-census-v2/extract_workqueue.py,5943,bac0903ee34a4218599a7d4402fea13559fc37b7efa757fa8bd687a6476f849b
+wizard-work/ledger/workqueue-census-v2/workqueue-census.md,46531,767727995788726a10f25df058d689f75a216ad10f49ebf55837dd3da5813ea7
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+wizard-work/ledger/workqueue-census/check_dash.py,691,cd912b49447684523d3b2b65116adbc4e19826796e119d50e122f32284118867
+wizard-work/ledger/workqueue-census/extract_workqueue_census.py,5728,82c29fa26dfc5e931b0506c8043d10532c125f2542d0cf88abf19cf05929f9f1
+wizard-work/ledger/workqueue-census/manifest.json,399,90ff4bc3849f0999e41e2921bacaac7e6cdbef4de42557ad317568175c000c8e
+wizard-work/ledger/workqueue-census/workqueue-census.md,46413,f14edee488b08f77a12cb41a01b7245b9c4f81d2c4a3a45a0b6e2dc4e0a79c54
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diff --git a/wizard-work/ledger/verify_ledger_dir_census.py b/wizard-work/ledger/verify_ledger_dir_census.py
new file mode 100644
index 0000000..5099363
--- /dev/null
+++ b/wizard-work/ledger/verify_ledger_dir_census.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+# verify_ledger_dir_census.py
+# Real test: re-derive the live inventory of wizard-work/ledger from the
+# filesystem and compare byte-for-byte with the committed artifact. Exits 0
+# iff identical. The artifact CSV is excluded from both sides so the check is
+# self-consistent across regeneration.
+import hashlib, os, csv, sys
+
+HERE = os.path.dirname(os.path.abspath(__file__))          # wizard-work/ledger
+REPO_ROOT = os.path.abspath(os.path.join(HERE, "..", ".."))  # troupe-standup root
+ARTIFACT = os.path.join(REPO_ROOT, "wizard-work", "ledger", "2026-10-30-ledger-dir-census.csv")
+SRC = HERE
+
+def re_derive():
+    rows = []
+    for dirpath, dirnames, filenames in os.walk(SRC):
+        dirnames.sort()
+        for fn in sorted(filenames):
+            full = os.path.join(dirpath, fn)
+            if os.path.abspath(full) == os.path.abspath(ARTIFACT):
+                continue
+            rel = os.path.relpath(full, REPO_ROOT)
+            size = str(os.path.getsize(full))
+            h = hashlib.sha256()
+            with open(full, "rb") as f:
+                for chunk in iter(lambda: f.read(1024 * 1024), b""):
+                    h.update(chunk)
+            rows.append((rel, size, h.hexdigest()))
+    rows.sort(key=lambda r: r[0])
+    return rows
+
+def read_committed(path):
+    with open(path, newline="", encoding="utf-8") as f:
+        r = csv.reader(f)
+        header = next(r)
+        assert header == ["rel_path", "size_bytes", "sha256"], f"bad header {header}"
+        return [tuple(x) for x in r]
+
+committed = read_committed(ARTIFACT)
+derived = re_derive()
+
+print(f"artifact: {ARTIFACT}")
+print(f"rows committed: {len(committed)}   rows re-derived: {len(derived)}")
+
+if committed == derived:
+    print("PASS: committed artifact matches live re-derivation.")
+    sys.exit(0)
+
+print("FAIL: mismatch (committed vs re-derived).")
+n = min(len(committed), len(derived))
+for i in range(n):
+    if committed[i] != derived[i]:
+        print(f"  first diff at row {i}:")
+        print(f"    committed: {committed[i]}")
+        print(f"    derived:   {derived[i]}")
+        break
+else:
+    if len(committed) < len(derived):
+        print(f"  derived has {len(derived)-len(committed)} extra rows")
+    else:
+        print(f"  committed has {len(committed)-len(derived)} extra rows")
+sys.exit(1)