~

Author: Tamara

codes/classical/analog/points_into_balls.yml

@@ -26,8 +26,6 @@ relations:
 _meta:
   # Change log - most recent first
   changelog:
-    - user_id: Copilot
-      date: '2026-08-29'
     - user_id: VictorVAlbert
       date: '2026-06-08'
     - user_id: VictorVAlbert

codes/classical/bits/tanner/algebraic/algebraic_ldpc.yml

@@ -24,8 +24,6 @@ relations:
 _meta:
   # Change log - most recent first
   changelog:
-    - user_id: Copilot
-      date: '2026-08-29'
     - user_id: VictorVAlbert
       date: '2026-06-08'
     - user_id: VictorVAlbert

codes/classical/q-ary_digits/easy/ternary_golay.yml

@@ -88,8 +88,6 @@ relations:
 _meta:
   # Change log - most recent first
   changelog:
-    - user_id: Copilot
-      date: '2026-08-29'
     - user_id: VictorVAlbert
       date: '2026-06-08'
     - user_id: VikramAmin

codes/quantum/oscillators/fock_state/constant_excitation/very-small-logical-qubit.yml

@@ -50,8 +50,6 @@ relations:
 _meta:
   # Change log - most recent first
   changelog:
-    - user_id: Copilot
-      date: '2026-08-13'
     - user_id: VictorVAlbert
       date: '2026-06-08'
     - user_id: VictorVAlbert

codes/quantum/qubits/stabilizer/fracton/hhb_fracton.yml

@@ -24,8 +24,6 @@ relations:
 
 _meta:
   changelog:
-    - user_id: Copilot
-      date: '2026-08-12'
     - user_id: VictorVAlbert
       date: '2026-06-08'
     - user_id: VictorVAlbert

codes/quantum/qubits/stabilizer/topological/surface/twist_defect/xzzx/xzzx.yml

@@ -96,8 +96,6 @@ relations:
 _meta:
   # Change log - most recent first
   changelog:
-    - user_id: Copilot
-      date: '2026-08-12'
     - user_id: VictorVAlbert
       date: '2026-06-08'
     - user_id: EricHuang

scripts/select_recent_random_codes.py

@@ -0,0 +1,158 @@
+#!/usr/bin/env python3
+
+# Pick a random sample of code_id keys for YAML files under codes/ that received
+# a substantive edit within the N months preceding a given reference date.
+#
+# Bulk commits that only stamp a new _meta changelog entry (e.g. e9237537c
+# touched 1104 of 1142 files) would otherwise mark nearly every code as
+# recently edited, so changes consisting solely of changelog entries do not
+# count as edits here.
+
+from __future__ import annotations
+
+import argparse
+import calendar
+import datetime
+import random
+import re
+import subprocess
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+
+CHANGELOG_LINE = re.compile(r"^[+-]\s*(-\s*)?(user_id|date)\s*:", re.IGNORECASE)
+
+
+def months_before(date: datetime.date, months: int) -> datetime.date:
+    month_index = date.month - 1 - months
+    year = date.year + month_index // 12
+    month = month_index % 12 + 1
+    return datetime.date(year, month, min(date.day, calendar.monthrange(year, month)[1]))
+
+
+def build_rename_map(start_date: datetime.date, end_date: datetime.date) -> dict[str, str]:
+    # Codes get reshuffled through the taxonomy, so an edit often lands under a
+    # path that no longer exists. Chain renames oldest-first so a historical
+    # path can be walked forward to where the entry lives now.
+    result = subprocess.run(
+        [
+            "git", "log", "--reverse",
+            f"--since={start_date.isoformat()}",
+            f"--until={end_date.isoformat()} 23:59:59",
+            "--name-status", "--find-renames", "--no-color", "--pretty=format:",
+            "--", "codes",
+        ],
+        cwd=REPO_ROOT,
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+
+    renames: dict[str, str] = {}
+    for line in result.stdout.splitlines():
+        if not line.startswith("R"):
+            continue
+        fields = line.split("\t")
+        if len(fields) == 3:
+            renames[fields[1]] = fields[2]
+    return renames
+
+
+def resolve_current_path(path: str, renames: dict[str, str]) -> str:
+    seen: set[str] = set()
+    while path in renames and path not in seen:
+        seen.add(path)
+        path = renames[path]
+    return path
+
+
+def find_substantively_edited_paths(start_date: datetime.date, end_date: datetime.date) -> set[Path]:
+    process = subprocess.Popen(
+        [
+            "git", "log",
+            f"--since={start_date.isoformat()}",
+            f"--until={end_date.isoformat()} 23:59:59",
+            "-p", "--unified=0", "--no-color", "--pretty=format:",
+            "--", "codes",
+        ],
+        cwd=REPO_ROOT,
+        stdout=subprocess.PIPE,
+        text=True,
+    )
+
+    edited: set[str] = set()
+    current: str | None = None
+    in_hunk = False
+
+    # Track hunk state explicitly: only inside a hunk does a leading +/- mean a
+    # changed line. Otherwise the "--- a/path" header, or a blank line between
+    # commits, gets misread as content.
+    assert process.stdout is not None
+    for line in process.stdout:
+        line = line.rstrip("\n")
+        if line.startswith("diff --git "):
+            current, in_hunk = None, False
+        elif line.startswith("+++ "):
+            target = line[4:].strip()
+            # "+++ /dev/null" marks a deletion and must not inherit the previous file.
+            current = target[2:] if target.startswith("b/") and target.endswith(".yml") else None
+        elif line.startswith("@@"):
+            in_hunk = True
+        elif in_hunk and current is not None and line[:1] in ("+", "-"):
+            if line.strip() in {"+", "-"} or CHANGELOG_LINE.match(line):
+                continue
+            edited.add(current)
+            current = None  # one substantive line settles this file
+
+    if process.wait() != 0:
+        raise subprocess.CalledProcessError(process.returncode, "git log")
+
+    renames = build_rename_map(start_date, end_date)
+    resolved = {REPO_ROOT / resolve_current_path(path, renames) for path in edited}
+    return {path for path in resolved if path.is_file()}
+
+
+def extract_code_id(path: Path) -> str | None:
+    with path.open("r", encoding="utf-8") as handle:
+        for line in handle:
+            stripped = line.split("#", 1)[0].strip()
+            if stripped.startswith("code_id:"):
+                return stripped[len("code_id:"):].strip().strip("'\"")
+    return None
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description="Randomly sample code_id keys for code YAML files edited in the months before a given date."
+    )
+    parser.add_argument(
+        "date",
+        nargs="?",
+        type=datetime.date.fromisoformat,
+        default=datetime.date.today(),
+        help="Reference date, YYYY-MM-DD (default: today).",
+    )
+    parser.add_argument("--months", type=int, default=3, help="Lookback window in months (default: 3).")
+    parser.add_argument("--count", type=int, default=5, help="Number of code_id keys to print (default: 5).")
+    parser.add_argument("--seed", type=int, default=None, help="Random seed, for reproducible sampling.")
+    args = parser.parse_args()
+
+    reference_date = args.date
+    start_date = months_before(reference_date, args.months)
+
+    candidates = sorted(
+        code_id
+        for code_id in (
+            extract_code_id(path)
+            for path in find_substantively_edited_paths(start_date, reference_date)
+        )
+        if code_id is not None
+    )
+
+    rng = random.Random(args.seed)
+    for code_id in rng.sample(candidates, min(args.count, len(candidates))):
+        print(code_id)
+
+
+if __name__ == "__main__":
+    main()

users/users_db.yml

@@ -34,10 +34,6 @@
 
 #
 
-- user_id: Copilot
-  name: 'Copilot'
-  githubusername: Copilot
-
 - user_id: TomaszAndrzejewski
   name: 'Tomasz Andrzejewski'
   githubusername: TomaszAnd