feat: add rename-ai-artifact tool and rename the drill-deck family to flashcard

Renaming an .ai artifact by hand is the kind of mechanical job that gets done incompletely: the canonical copy moves but the mirror doesn't, a reference in the INDEX is missed, a trigger phrase points at the old name. I'd also assumed a rename was costly because references scatter, when the index update is trivial and the drift check already guards it. So I built the discipline into a script instead of re-deriving it each time.

scripts/rename-ai-artifact.sh takes old and new basenames, moves the file in both the canonical and mirror trees, and rewrites every reference repo-wide on a token boundary so renaming "foo" can't corrupt "foobar" or "foo-bar". It rewrites the underscore module-name variant too (a hyphenated script imported as foo_bar via importlib), leaves the archived session records under sessions/ alone because they're history, and runs workflow-integrity + sync-check at the end to prove no drift. rename-artifact.org documents it and indexes the triggers.

Then I used the tool to do the rename that prompted it: the org-drill deck workflow and its helpers are now flashcard-named, since "flashcard" is the word you'd actually search for. The renamed set is flashcard-review.org plus flashcard-stats.py, flashcard-sync, flashcard-to-anki.py, and flashcard-diff-ids.py, with their tests, every reference, and the INDEX entry updated. The deck is still an org-drill deck under the hood, so the ":drill:" tag handling and the "drill deck" trigger phrases stay. I added "review/update the flashcards" alongside them.

Tests: 9 bats for the rename tool (including the prefix-collision and history-preservation edges), and the renamed script suites all pass under make test.

1 files changed, 232 insertions, 0 deletions

diff --git a/.ai/scripts/flashcard-to-anki.py b/.ai/scripts/flashcard-to-anki.py
new file mode 100755
index 0000000..7227683
--- /dev/null
+++ b/.ai/scripts/flashcard-to-anki.py
@@ -0,0 +1,232 @@
+#!/usr/bin/env -S uv run --script
+# /// script
+# requires-python = ">=3.11"
+# dependencies = [
+#   "genanki>=0.13",
+# ]
+# ///
+"""Convert an org-drill file into an Anki .apkg deck.
+
+Parses org-drill structure:
+  - Top-level "* Section" headings become tags on every card under them.
+  - Each "** Card name :drill:" entry becomes a card. Front = heading
+    text (sans :drill: tag). Back = entry body with newlines converted
+    to <br>.
+
+Deck name defaults to the input basename, case preserved. Deck and model
+IDs are derived from the deck name via stable hash so re-importing the
+same deck updates existing cards instead of duplicating them.
+
+Output defaults to ~/sync/phone/anki/<input-basename>.apkg. The .apkg is
+a mobile-Anki artifact the phone picks up from its sync dir, so it lands
+there rather than next to the org source.
+
+Usage:
+  flashcard-to-anki.py <input.org>
+  flashcard-to-anki.py <input.org> --deck "My Deck Name"
+  flashcard-to-anki.py <input.org> --output /path/to/deck.apkg
+
+Requires genanki, which uv resolves automatically via the PEP 723
+script metadata above. No venv or system install needed.
+"""
+from __future__ import annotations
+
+import argparse
+import hashlib
+import re
+import sys
+from pathlib import Path
+
+import genanki
+
+# 32-bit integer space genanki accepts. Start above the conventional
+# "user model" floor so collisions with hand-written decks stay
+# unlikely.
+ID_BASE = 1_500_000_000
+ID_RANGE = 500_000_000
+
+
+def stable_id(name: str, salt: str) -> int:
+    """Derive a deterministic 32-bit id from `name` and a `salt`.
+
+    Same (name, salt) pair always returns the same id, so re-running
+    against the same source produces a stable deck/model id pair and
+    Anki imports update existing cards in place rather than duplicating.
+    """
+    h = hashlib.sha256(f"{salt}:{name}".encode()).hexdigest()
+    return ID_BASE + (int(h[:8], 16) % ID_RANGE)
+
+
+def make_model(deck_name: str) -> genanki.Model:
+    return genanki.Model(
+        stable_id(deck_name, "model"),
+        f"{deck_name} (Craig)",
+        fields=[{"name": "Front"}, {"name": "Back"}],
+        templates=[
+            {
+                "name": "Card 1",
+                "qfmt": "{{Front}}",
+                "afmt": '{{FrontSide}}<hr id="answer">{{Back}}',
+            }
+        ],
+        css=(
+            ".card { font-family: sans-serif; font-size: 18px; "
+            "color: #222; background: #fafafa; line-height: 1.45; }\n"
+            "hr#answer { margin: 14px 0; }\n"
+        ),
+    )
+
+
+def section_to_tag(title: str) -> str:
+    return re.sub(r"[^a-z0-9]+", "-", title.lower()).strip("-")
+
+
+def escape_html(s: str) -> str:
+    return (
+        s.replace("&", "&amp;")
+        .replace("<", "&lt;")
+        .replace(">", "&gt;")
+    )
+
+
+def strip_org_metadata(body_lines: list[str]) -> list[str]:
+    """Drop :PROPERTIES: drawers, planning lines, and created-date lines.
+
+    Org-drill needs these in the source file (SRS state lives in the
+    PROPERTIES drawer; SCHEDULED carries the next-review date), but they
+    are noise on the back of an Anki card. A created/added date never
+    belongs on a card, so a stray "Created:" or ":CREATED:" body line is
+    dropped too.
+    """
+    cleaned: list[str] = []
+    in_drawer = False
+    planning_re = re.compile(r"^\s*(SCHEDULED|DEADLINE|CLOSED):\s")
+    created_re = re.compile(r"^\s*:?created:?\s", re.IGNORECASE)
+    drawer_start_re = re.compile(r"^\s*:PROPERTIES:\s*$")
+    drawer_end_re = re.compile(r"^\s*:END:\s*$")
+    for line in body_lines:
+        if in_drawer:
+            if drawer_end_re.match(line):
+                in_drawer = False
+            continue
+        if drawer_start_re.match(line):
+            in_drawer = True
+            continue
+        if planning_re.match(line) or created_re.match(line):
+            continue
+        cleaned.append(line)
+    return cleaned
+
+
+def parse(org_text: str) -> list[tuple[str, str, str]]:
+    """Return [(front, back_html, tag), ...] for every :drill: card."""
+    cards: list[tuple[str, str, str]] = []
+    current_section: str | None = None
+
+    section_re = re.compile(r"^\*\s+(.+?)\s*$")
+    card_re = re.compile(r"^\*\*\s+(.+?)\s+:drill:\s*$")
+
+    lines = org_text.splitlines()
+    i = 0
+    while i < len(lines):
+        line = lines[i]
+
+        sec = section_re.match(line)
+        if sec:
+            current_section = sec.group(1).strip()
+            i += 1
+            continue
+
+        card = card_re.match(line)
+        if card:
+            front = card.group(1).strip()
+            body_lines: list[str] = []
+            i += 1
+            while i < len(lines):
+                nxt = lines[i]
+                if nxt.startswith("* ") or card_re.match(nxt):
+                    break
+                body_lines.append(nxt)
+                i += 1
+            body_lines = strip_org_metadata(body_lines)
+            while body_lines and not body_lines[0].strip():
+                body_lines.pop(0)
+            while body_lines and not body_lines[-1].strip():
+                body_lines.pop()
+            back_html = "<br>".join(escape_html(ln) for ln in body_lines)
+            tag = section_to_tag(current_section) if current_section else "drill"
+            cards.append((front, back_html, tag))
+            continue
+
+        i += 1
+
+    return cards
+
+
+def build(cards: list[tuple[str, str, str]], deck_name: str) -> genanki.Deck:
+    deck = genanki.Deck(stable_id(deck_name, "deck"), deck_name)
+    model = make_model(deck_name)
+    for front, back, tag in cards:
+        note = genanki.Note(
+            model=model,
+            fields=[front, back],
+            tags=[tag],
+            guid=genanki.guid_for(front),
+        )
+        deck.add_note(note)
+    return deck
+
+
+def default_deck_name(input_path: Path) -> str:
+    return input_path.stem
+
+
+def default_output_path(input_path: Path) -> Path:
+    anki_dir = Path.home() / "sync" / "phone" / "anki"
+    return anki_dir / f"{input_path.stem}.apkg"
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Convert an org-drill file into an Anki .apkg deck.",
+    )
+    parser.add_argument(
+        "input",
+        type=Path,
+        help="Path to the org-drill source file.",
+    )
+    parser.add_argument(
+        "--deck",
+        help="Deck name. Defaults to the input basename.",
+    )
+    parser.add_argument(
+        "--output",
+        type=Path,
+        help="Output .apkg path. Defaults to "
+             "~/sync/phone/anki/<input-basename>.apkg.",
+    )
+    args = parser.parse_args()
+
+    input_path: Path = args.input.expanduser().resolve()
+    if not input_path.is_file():
+        print(f"error: {input_path} not found", file=sys.stderr)
+        return 1
+
+    org_text = input_path.read_text(encoding="utf-8")
+    deck_name = args.deck or default_deck_name(input_path)
+    output_path: Path = (args.output or default_output_path(input_path)).expanduser().resolve()
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+    cards = parse(org_text)
+    if not cards:
+        print(f"error: no :drill: cards found in {input_path}", file=sys.stderr)
+        return 1
+
+    deck = build(cards, deck_name)
+    genanki.Package(deck).write_to_file(str(output_path))
+    print(f"wrote {output_path} ({len(cards)} cards, deck '{deck_name}')")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())