읽기 연습. Each mode opens with what the round is and a Start button; the
round is timed, and a finished one reports accuracy and time, keeps the
best per mode and says when it was beaten. In sound mode the written
spelling is among the options — reading it as written is the habit the
drill exists to break, so it is the distractor that matters. Answers stay
marked 450ms when right, 900ms when a rule is shown, 1400ms when wrong.
The best rounds sync (trainer.drill), merged mode by mode: the higher
accuracy, then the faster time.
문법. An All chip, a count on every category, 반말 selected first — it is
what manhwa speech is made of — and each row names its category, so the
list still reads under All.
활용 연습. Words come in random order, not the pool's; the running score
comes back after a reload; a wrong answer shows what was typed beside what
it should have been, then the rule. The pool adds the roadmap's own verbs
and adjectives to the deck's. A form lib/conjugation.js cannot build no
longer leaves the Check button stuck.
문장. The artifact's lesson on the ending word and the 서술어 legend, a count
on each level, and every sentence's place in review — as far along as its
least-known chunk, since the chunks are the cards.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The reworked bundle's PORT.md makes row-level last-write-wins conditional
on three gates, each learned by losing real data. The port's sync broke
all three, and had four more ways to lose or stall work. Both ends change,
so this is one protocol version, refused by the other side if mismatched.
Gate 1, hydration. A device now pulls every page the server holds before
it may push anything; it used to push first. The 14 Sep laptop — a
week-old copy re-stamped at boot and pushed over a week of phone work —
is now a test, and the phone's week survives it. Boot writes nothing
syncable either: the lesson opens with the app's own words (the artifact's
seeded turn) and waits for Start, instead of stamping a reply and a
progress edit before a server can even be configured.
Gate 2, a counter. Every row remembers the change_seq it last agreed with
(base_seq). The server applies a write only if that still matches —
compare-and-swap under an advisory lock — and otherwise returns its copy
as a conflict. No clock is compared anywhere: a device an hour fast used
to win every conflict for an hour, and a slow one's newer edit was
silently dropped with HTTP 200. dirty and rev replace the timestamp
watermark, which lost edits whenever a clock moved backwards.
Gate 3, no silent shrinking. A conflict is settled by what each copy
holds (sync/resolve.ts): more reviews, more evidence, a finished unit, the
further roadmap position, the union of learned grammar. A deliberate
shrink is explicit: a reset or a cleared lesson raises a marker every
device obeys, including its own unsynced edits, so a reset is not undone
by a device that had not heard of it. Trimming the transcript is local
and tombstones nothing — it used to delete the other device's turns.
Also fixed on the way:
· keys travel as JSON arrays — a space in 몇 명 used to stop every
device's pull at that row, permanently;
· pulls take a shared lock against pushes, so a change_seq committed
out of order can no longer be skipped;
· study_log and peek are per device and summed, so two devices' reviews
of one day both count;
· each user's data has an epoch; a server that lost it is detected,
and the device re-hydrates and offers its data back;
· a protocol-1 client is refused with 426 rather than half-understood.
Migration 9 adds the columns, re-keys the counters and tombstones; the
server drops protocol-1 rows once (none were deployed). Verified: 14
two-device scenarios against a real Postgres, and two browser profiles
syncing a lesson through the UI.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
