Its server, client, app and curator, and the tools that write its
assets (maps, Anki fixtures, icons), as they are; paths are fixed in
the commits that follow.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Sign-in (anonymous, GitHub, email codes), an account's ways in and its
deletion, the pruning and the instance's basics move into the
halkyon_base module (ADR 0014), which every Halkyon server includes.
Learn configures it in server.dart and deletes its own data with a
person through the module's hook, in the order it did. The identity
tables move unchanged: the migration records versions only. The app
calls the module's endpoints; instance.info() stays as it was.
BREAKING CHANGE: the sign-in endpoints moved into the module, so apps up
to build 20 can no longer sign in or start; minimumAppBuild is 21.
Deploy this only together with the release of build 21.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Once the person agrees, the device holds MeCab's IPADIC and the
instance's JMdict and cuts lines as Jisho.org does, so their text never
leaves it (ADR 0012). MeCab comes through mecab_for_dart, whose build
hook compiles it; its tokens are grouped by Ve's rules, written anew in
Dart, with に kept a word of its own. Each word is found as it stands or
as a form of a word, else by its dictionary form, else as the longest
words it holds from token to token; longer words over token boundaries
are offered as before.
The curator packs Ubuntu's compiled IPADIC beside the dictionary files
(curate ipadic, and every update run). The server exports its JMdict
from its tables, so the device finds the same keys and keeps the same
versions, and serves both at /device-dictionaries/, named in
dictionary.deviceFiles('ja') with their hashes; Caddy forwards the path.
The app checks each file against its hash, unpacks IPADIC, builds a
SQLite database from the export on an isolate, and asks the instance
for newer files every 30 days, downloading only what changed. The Watch
screen offers the download once per device with its size (34 MB, some
150 MB once set up); Settings downloads and removes them. Without them,
or should cutting on the device fail, lines go to the instance as
before. MeCab's, IPADIC's and Ve's licences join the licence list.
Every build now needs a C++ compiler; mecab_for_dart holds code_assets
at 1.x.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
A profile now has a page on the web, at the root of the account domain
(https://halkyon.eu/@raisondetredev where the operator set ACCOUNT_DOMAIN,
else on the instance's web server), so the address belongs to the
identity rather than to Learn and stays when other services share it
(ADR 0011). The page shows what the app's profile sheet shows, in English
or German, without JavaScript or cookies, asks search engines not to list
it, marks every link rel="me" so other sites can verify links to it, and
sends a visitor who asked on another host to its own address. Caddy
forwards /@… to the web server, and serves nothing else on the account
domain; compose now passes ACCOUNT_DOMAIN on, which it never did.
A link is verified as Mastodon verifies one: its page links back to the
profile's with rel="me". profile.checkLinks fetches each link's page, at
most ten times an hour, over HTTPS on port 443 and to public addresses
only, connecting to the address it checked and verifying the certificate
for the host, with three redirects, 1 MiB and ten seconds at most, and
keeps what links back on the profile (verifiedLinks, a column of a table
no device syncs). A changed link loses its check, a new handle all of
them. The app shows the page's address to copy, checks a link saved by
itself and on Check links, and marks verified links in the form and in
others' profiles; a check answered after a newer save only adds its
checks.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
An instance now names a Jellyfin server for its people to learn from
(instance.info().jellyfinUrl): its operator's JELLYFIN_URL (`none`: none),
else https://jellyfin. on the domain registered for its public host, as
learn.halkyon.eu suggests jellyfin.halkyon.eu, once that answers as a
Jellyfin server. The registered domain comes from Mozilla's Public Suffix
List, kept in the server's data folder, so an instance at example.co.uk
never names someone else's jellyfin.co.uk. The instance looks as it
starts and again hourly when asked; the app never reaches for a guessed
address.
In the app, Add material offers From Jellyfin as soon as the instance
suggests a server, before anyone signed in to one. The sign-in fills the
server in and finds it by itself, and lists the people the server shows
on its login screen: one without a password, as a demo's, signs in with
a tap; one with a password is named in the form, which asks for it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
A Claude plan can't drive a chat inside another app, but Claude's apps
(every plan, the phone apps too) can add a remote MCP server as a custom
connector. The instance now is one (ADR 0006): Serverpod's web server
serves the MCP endpoint (/mcp, Streamable HTTP, JSON answers, no
sessions) with five read-only tools over the person's own synced rows
(their studysets, a studyset's cards and notes a page at a time, a
search across cards, a note, their progress), and the OAuth the
specification asks for: protected resource and authorization server
metadata, dynamic client registration, authorization code with PKCE
(S256 only), tokens bound to the resource, iss in the response, refresh
tokens that rotate. Caddy forwards these paths alone to the web server,
which production now runs on 8082.
People connect with a code from the app (Settings › Assistant › Connect
Claude): eight Crockford characters, valid for ten minutes and once,
typed on the authorization page, which names where it returns to, loads
nothing from elsewhere and may not be framed. Anonymous people can
connect too. Codes and tokens are kept only as SHA-256 hashes; an access
token lives an hour, a refresh token 30 days. The app lists what is
connected and disconnects it, which ends its tokens at once; deleting
the account deletes it; a daily job forgets what expired and clients
nobody connected within a week. InstanceInfo says where the connector is
(additive); the migration only adds server-only tables, so devices and
older apps are untouched.
The handlers take plain requests, so the integration tests drive the
whole flow (registration, the code, tokens, refresh, the tools, another
person's content, disconnecting, expiry, pruning, account deletion)
without a web server.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Serverpod's rate limit for new anonymous accounts (30 per IP address and
hour) notes every attempt with the address it came from, and deletes
those notes only for email sign-in, which this instance doesn't offer. So
the IP address of everyone who ever started the app stayed in the
database, and in every backup, for good.
The server now deletes them hourly once the limit's hour is past, so an
address is kept for at most two hours. The rows already there go at the
first run after the deploy; backups keep them until they expire (about
three months).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Explore says how many people learn a published studyset on this instance
(ADR 0005, rule 8): shown, never ranked, counted daily by the server from
the people with an identity who chose to be counted (Settings, Privacy;
settings schema 8) and studied a copy on 3 or more days of the last 30,
rounded down from 5 on, so that nobody can be told apart. Only a number
the instance computes itself counts; votes count for nothing. The author
sees the same rounded number in the Publish sheet.
A copy of a published studyset is published within the original's
licence: never under "no derivatives", under a licence that keeps
adaptations under it only under that one, in every studyset of the copy.
Its releases say what they are based on, and Explore shows it.
ADR 0005 gets an addendum with stage 3's decisions.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Every dictionary entry now has a version: 16 hex digits of the SHA-256 of
what cards take of it (headword, reading, entry), made by the loader and
carried on every hit. A card keeps the version it took (card schema 8).
DictionaryEndpoint.changed returns, of the entries named with the
versions cards keep (1,000 at most a call; the app asks 500 at a time),
those whose version is another now.
The card browser says how many cards are behind their dictionary and takes
the corrections at a tap (decided 2026-10-09: by offer, never by
themselves). Taking one writes the entry as it is now over the revision
in which the card last took it, beside whatever came after, so the
revisions merge per side as two devices' edits do (ADR 0003): a side only
the dictionary changed takes the correction, a side the person changed
too is a conflict settled in the composer, whose words now name that
case. Cards made before versions are never offered one.
The server rereads its dictionary folder hourly now, not daily: the
dictionaries service fills its volume after an instance's first start,
and an hour with nothing changed costs a hash of each file.
Migration 20261009145434785-dictionary-entry-version: adds
dictionary_entry.version, text NOT NULL DEFAULT '' (rows loaded before
have none and are never reported as corrected), and by hand empties
dictionary_source."fileHash", so every source loads once more and its
entries get their versions; the schema stays as definition.sql says. The
old server goes on working until the switch.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
EDRDG's licence asks of a server showing its dictionaries that it update
them at least monthly. The instance now does it alone: a `dictionaries`
service in compose, built from the curator (halkyon_learn_curator/
Dockerfile, its own unprivileged user 10001, 1 GB at most), runs `curate
update --every 7`, downloading EDRDG's files of the day once its files are
a week old and replacing them in a volume the server mounts read-only.
The curator never enters the server's image or process (decided
2026-10-09: a container of its own, weekly). The server rereads the
folder daily at 04:07 (DictionaryReloadFutureCall), loading what changed,
and loads now run one at a time. redeploy.sh builds both images.
An operator who'd rather supply the files removes the service and mounts
deploy/dictionaries/ into the server, as compose.yaml says.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
The curator:
- A word JMdict says is usually written in kana gets a kana headword,
even where the JLPT lists give kanji (その, not 其の), and a rare or
search-only spelling is never the headword while a usual reading
exists (そして, not 而して); 9,611 headwords change, 96 of them N5.
- Keys hold full-width letters as typed (Ｔシャツ as tシャツ), デュ/テュ/
フュ/イェ romanised, long a, i and e typed once as loose keys (kado for
カード), and a blank JLPT line is skipped.
The server:
- A search is one query ordered by tier, then rank: a loose or prefix
match no longer pushes an exact one out of the list (75-150 ms over
all of JMdict, before 150-450).
- Queries find long vowels with macrons spelt おお or ー and typed once
(ōkii, kōhī), ん typed n' or nn, and full-width letters.
- Pages of a label are ordered by rank and id, so entries that share a
rank are neither repeated nor skipped.
- The loader never throws (an unreadable folder ended the server from
the background), refuses two files of one source rather than loading
both at every start, reads no rows back when replacing a source, and
takes its time from clock.
- Dictionary files stay out of the Docker build context.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
The server now holds dictionaries for everyone: `dictionary_entry` and
`dictionary_source`, reference data owned by no one, never synced. It
loads the dictionary files in its `dictionaries` folder at every start,
those whose SHA-256 changed: in the background, each source replaced in
one transaction, so searches meanwhile find the old entries; a file it
can't read is logged and left out. All of JMdict loads in under half a
minute. On an instance the folder is deploy/dictionaries, mounted
read-only (compose.yaml); the server's README says how.
DictionaryEndpoint (signed in): the dictionaries with their credits; a
search (exact key, exact loose key, key starting with the query, loose
key starting with it, each in the source's order; katakana as hiragana,
macrons written out), some 150-450 ms over all of JMdict; and the
entries with a label, counted and a page at a time (all JLPT N5 words).
The curator now keeps spellings that aren't quite right apart, as
`looseKeys` (romaji with long vowels typed once): "sushi" finds 寿司
before 数詞 (すうし).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
The asset endpoint (login required) takes a file into the caller's own space
by its SHA-256 and serves an asset row's file only to its space's owner and
members; anyone else, and a deleted row, gets NotFoundException as for a
missing file. startUpload hands out Serverpod's upload description, or null
when the file is there already (claiming it anew); finishUpload keeps the
upload only if its content has the announced hash. Files are stored in the
private database storage at spaces/<space>/<sha256>, at most 20 MB.
deletePerson deletes the person's files in its transaction, and a daily
future call deletes the files no live asset row refers to, and uploads never
finished, 7 days after they were last claimed (ADR 0004, rule 5).
The tests run on the sync engine's database, as the server does, without
rollback: its writes take transactions of their own.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
deletePerson deletes a person with everything they have, in one transaction and in ADR 0001 rule 6's order: their sessions first, since a device with a valid session would re-upload everything; then their memberships and personal space, whose foreign keys cascade into every synced table and the sync engine's bookkeeping; then the person, whose identities cascade. AccountEndpoint.delete deletes the caller and tells their devices that their sessions ended.
pruneAbandonedAnonymousPeople deletes, 500 at a time, anonymous people created and unused for 90 days: their sessions have expired and nobody can ever return to them. Identified people are never pruned. PruningFutureCall runs it daily at 03:17; the server schedules it at start, cancelling the previous entry by its identifier first, since scheduling always adds one.
Tests, refusal first: deleting when not signed in; deleting removes the caller, their sessions, their anonymous identity and the content of their space, and nobody else's; pruning takes the unused and the never-signed-in, and spares the recently used, newcomers and identified people.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
As decided, a GitHub sign-in keeps nothing but the numeric GitHub ID, so the login is our own, on Serverpod's GitHub helpers (lib/src/auth/github.dart): Serverpod's stock login also stores the name and email in a profile and downloads the avatar, and its endpoint is never exposed. The server exchanges the authorization code with the client secret, reads the ID, and drops the access token.
GitHubUpgradeEndpoint links the GitHub ID to the signed-in anonymous person, grants identified (to their existing sessions too) and removes the anonymous identity, in one transaction: the person, their spaces and their studysets stay the same. GitHubSignInEndpoint gives a session for a person who has the GitHub account already; it's called without a session, since Serverpod issues no session for another person inside a signed-in call, and it never creates people. InstanceEndpoint.info() tells the app the instance's GitHub client ID. Refusals are GitHubSignInRefusedException with a reason: GitHub sign-in off here, the account taken by another person, another GitHub account linked already, an unknown account.
GitHub sign-in is on only where the passwords hold githubClientId and githubClientSecret (empty counts as missing, as Compose passes unset variables on as empty strings); production takes them from GITHUB_CLIENT_ID and GITHUB_CLIENT_SECRET in deploy/.env. grantIdentified can now join a caller's transaction. No migration: the GitHub accounts table comes with the auth module.
Tests, refusals first: upgrading when not signed in (checked by switching the guard off: the test fails), both ways without a GitHub app, an account taken by someone else with nothing changed, a second GitHub account, an unknown account with nobody created; then linking keeps the person and reaches their sessions and stores no email, linking twice changes nothing, signing in reaches the right person.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
People can sign in without an account: AnonymousIdpEndpoint exposes Serverpod's anonymous identity provider. lib/src/auth/auth_config.dart holds the token managers and identity providers, shared by server.dart and the tests, so the tests check what production runs. At most 30 new anonymous accounts per IP address and hour (Serverpod's default is 100): a school class behind one address can still start together, while one abuser gets at most 720 a day. No migration: the tables for anonymous accounts and rate limiting already exist.
Tests: signing in creates a person; the 31st account from one IP address within an hour is refused. They run without database rollback, since signing in uses concurrent transactions that the rollback can't wrap, and delete what they create instead.
The server switches off the lint rules for Dart v3.13's constructor syntax: Serverpod v4.0.2's code generator can't parse it yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
The workspace root's analysis_options.yaml includes leancode_lint 27 and enables its analyzer plugin (rules for blocs, Equatable and Flutter layout); the server and the app include that file, while the generated client keeps its own options. Plugins can only be enabled at the root of a pub workspace and only reach packages whose options include the root file, which was verified before settling on this layout. Most rules are warnings, casts, inference and raw types are strict, and the check treats infos as fatal too. lints and flutter_lints are no longer needed.
tool/check.sh checks formatting, runs dart analyze --fatal-infos and the server tests; .git/hooks/pre-push links to it, so every push has to pass it. AGENTS.md describes the checklist and how to install the hook in a fresh clone.
Fixes for the new rules: package imports, run() returns Future<void>, the server setup as one cascade, a primary constructor for the app widget, a const and a redundant argument. The workspace root keeps its conventional name `_` with a documented ignore.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Deviations from a stock `serverpod create`:
- Dropped Flutter web support, for two reasons:
- Appflowy editor had issues in the past, potentially related to the
Flutter-Web IME bridge. Upstream has also open bugs in relation to
that:
- AppFlowy-IO/appflowy-editor#1029 [Bug][Web] Unwanted space on click
and overall space bugs (open)
- AppFlowy-IO/appflowy-editor#782 [Bug] Editor auto-scrolling when
pressing space too quickly if placed inside a scrollable (open)
- Offline-first is a required feature. serverpod_offline_sync's SQLite
support in browsers, maybe via sqlite3.wasm + OPFS, is not
documented.
- SDK constraints raised to ^3.13.0, instead of ^3.12.2, so enjoy the
newest language features.
- Pinned to Flutter 3.47.4 via FVM.
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
