ledger: add commit-author census extract (23 authors, 2163 commits) with CHECK

wizard-work/ledger/2026-10-29-commit-author-census/CHECK

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+# CHECK -- commit-author census extract (Extract lane, ledger).
+#
+# Replays `git log --format=%an` from the committed tree and diffs the derived
+# author->count map against the committed commits-by-author.tsv and
+# commits-by-author.json. Exit code IS the verdict:
+#   0 = PASS (replay matches committed files)
+#   nonzero = FAIL
+#
+# No || true / ; true / ; echo arms, no trailing prose: the exit code is the
+# verdict and a prose gloss is a fault (tools/check_lint.py).
+
+set -u
+
+# Resolve the repo root from git so the check is location-independent.
+REPO="$(git rev-parse --show-toplevel)" || exit 1
+ART="$REPO/wizard-work/ledger/2026-10-29-commit-author-census"
+cd "$ART" || exit 1
+
+python3 - <<'PY'
+import csv
+import json
+import subprocess
+import sys
+
+out = subprocess.run(
+    ["git", "log", "--format=%an"], capture_output=True, text=True, check=True
+).stdout
+counts = {}
+for line in out.splitlines():
+    counts[line] = counts.get(line, 0) + 1
+
+# Deterministic order: count desc, author asc (matches the committed TSV/JSON).
+expected = sorted(counts.items(), key=lambda kv: (-kv[1], kv[0]))
+
+with open("commits-by-author.tsv", encoding="utf-8") as fh:
+    tsv = list(csv.reader(fh, delimiter="\t"))
+committed = [(r[0], int(r[1])) for r in tsv[1:]]
+
+if len(expected) != len(committed):
+    print(f"FAIL: author count replay={len(expected)} committed={len(committed)}")
+    sys.exit(1)
+for (a_exp, c_exp), (a_got, c_got) in zip(expected, committed):
+    if a_exp != a_got or c_exp != c_got:
+        print(f"FAIL: TSV author={a_exp}/{c_exp} got={a_got}/{c_got}")
+        sys.exit(1)
+
+with open("commits-by-author.json", encoding="utf-8") as fh:
+    j = json.load(fh)
+if j.get("total_commits") != sum(c for _, c in expected):
+    print("FAIL: JSON total_commits mismatch")
+    sys.exit(1)
+if j.get("authors") != len(expected):
+    print("FAIL: JSON authors mismatch")
+    sys.exit(1)
+for (a_exp, c_exp), gl in zip(expected, j["rows"]):
+    if (a_exp, c_exp) != (gl["author"], gl["commits"]):
+        print(f"FAIL: JSON row {a_exp}/{c_exp} got {gl['author']}/{gl['commits']}")
+        sys.exit(1)
+
+print(
+    f"PASS: {len(expected)} authors, {sum(c for _, c in expected)} commits "
+    f"(replay == commits-by-author.tsv + .json)"
+)
+PY
+exit $?

wizard-work/ledger/2026-10-29-commit-author-census/commits-by-author.json

@@ -0,0 +1,100 @@
+{
+  "generated_utc": "2026-10-29T17:00:00Z",
+  "source": "git log --format=%an",
+  "total_commits": 2163,
+  "authors": 23,
+  "rows": [
+    {
+      "author": "Timmy",
+      "commits": 556
+    },
+    {
+      "author": "ledger",
+      "commits": 239
+    },
+    {
+      "author": "timmy",
+      "commits": 209
+    },
+    {
+      "author": "spark",
+      "commits": 193
+    },
+    {
+      "author": "Volt",
+      "commits": 189
+    },
+    {
+      "author": "Zephyrus Sparkborn",
+      "commits": 129
+    },
+    {
+      "author": "Merlin",
+      "commits": 118
+    },
+    {
+      "author": "beam",
+      "commits": 107
+    },
+    {
+      "author": "sol",
+      "commits": 90
+    },
+    {
+      "author": "quill",
+      "commits": 77
+    },
+    {
+      "author": "volt",
+      "commits": 66
+    },
+    {
+      "author": "forge",
+      "commits": 62
+    },
+    {
+      "author": "sphinx",
+      "commits": 32
+    },
+    {
+      "author": "null",
+      "commits": 28
+    },
+    {
+      "author": "Mercury",
+      "commits": 21
+    },
+    {
+      "author": "pipe",
+      "commits": 18
+    },
+    {
+      "author": "zephyrus-sparkborn",
+      "commits": 14
+    },
+    {
+      "author": "troupe-pipe",
+      "commits": 6
+    },
+    {
+      "author": "Cassian Assayborn",
+      "commits": 3
+    },
+    {
+      "author": "argus",
+      "commits": 3
+    },
+    {
+      "author": "Argus",
+      "commits": 1
+    },
+    {
+      "author": "rockachopa",
+      "commits": 1
+    },
+    {
+      "author": "sentinel",
+      "commits": 1
+    }
+  ]
+}

wizard-work/ledger/2026-10-29-commit-author-census/commits-by-author.md

@@ -0,0 +1,32 @@
+# Commit-author census
+
+Live extract of commit authorship from the repository at
+revision `9aba6df` (HEAD), generated 2026-10-29 17:00Z (UTC).
+
+| rank | author | commits |
+|---|---|---|
+| 1 | Timmy | 556 |
+| 2 | ledger | 239 |
+| 3 | timmy | 209 |
+| 4 | spark | 193 |
+| 5 | Volt | 189 |
+| 6 | Zephyrus Sparkborn | 129 |
+| 7 | Merlin | 118 |
+| 8 | beam | 107 |
+| 9 | sol | 90 |
+| 10 | quill | 77 |
+| 11 | volt | 66 |
+| 12 | forge | 62 |
+| 13 | sphinx | 32 |
+| 14 | null | 28 |
+| 15 | Mercury | 21 |
+| 16 | pipe | 18 |
+| 17 | zephyrus-sparkborn | 14 |
+| 18 | troupe-pipe | 6 |
+| 19 | Cassian Assayborn | 3 |
+| 20 | argus | 3 |
+| 21 | Argus | 1 |
+| 22 | rockachopa | 1 |
+| 23 | sentinel | 1 |
+
+Total commits: 2163 | authors: 23

wizard-work/ledger/2026-10-29-commit-author-census/commits-by-author.tsv

@@ -0,0 +1,24 @@
+author	commits
+Timmy	556
+ledger	239
+timmy	209
+spark	193
+Volt	189
+Zephyrus Sparkborn	129
+Merlin	118
+beam	107
+sol	90
+quill	77
+volt	66
+forge	62
+sphinx	32
+null	28
+Mercury	21
+pipe	18
+zephyrus-sparkborn	14
+troupe-pipe	6
+Cassian Assayborn	3
+argus	3
+Argus	1
+rockachopa	1
+sentinel	1

wizard-work/ledger/2026-10-29-commit-author-census/gen.py

@@ -0,0 +1,46 @@
+import csv
+import json
+import subprocess
+
+# True source of truth: the repo's git history, author by author.
+out = subprocess.run(
+    ["git", "log", "--format=%an"], capture_output=True, text=True, check=True
+).stdout
+counts = {}
+for line in out.splitlines():
+    counts[line] = counts.get(line, 0) + 1
+
+# Deterministic order: count desc, author asc.
+rows = sorted(counts.items(), key=lambda kv: (-kv[1], kv[0]))
+
+with open("commits-by-author.tsv", "w", encoding="utf-8") as fh:
+    w = csv.writer(fh, delimiter="\t", lineterminator="\n")
+    w.writerow(["author", "commits"])
+    for author, commits in rows:
+        w.writerow([author, commits])
+
+total = sum(c for _, c in rows)
+with open("commits-by-author.json", "w", encoding="utf-8") as fh:
+    json.dump(
+        {
+            "generated_utc": "2026-10-29T17:00:00Z",
+            "source": "git log --format=%an",
+            "total_commits": total,
+            "authors": len(rows),
+            "rows": [{"author": a, "commits": c} for a, c in rows],
+        },
+        fh,
+        indent=2,
+    )
+    fh.write("\n")
+
+with open("commits-by-author.md", "w", encoding="utf-8") as fh:
+    fh.write(
+        "# Commit-author census\n\nLive extract of commit authorship from the repository at\nrevision `9aba6df` (HEAD), generated 2026-10-29 17:00Z (UTC).\n\n| rank | author | commits |\n|---|---|---|\n"
+    )
+    for i, (author, commits) in enumerate(rows, 1):
+        fh.write(f"| {i} | {author} | {commits} |\n")
+    fh.write(f"\nTotal commits: {total} | authors: {len(rows)}\n")
+
+print("total_commits:", total)
+print("authors:", len(rows))