A phone without a camera whose authenticator doesn't open otpauth: had no
way but typing the key. It is copied again, the key alone (ADR 0017
amended, the developer's decision of 3 Nov 2026): on Android through each
app's SensitiveClipboard.kt, marked EXTRA_IS_SENSITIVE, so Gboard and the
system show no preview and keep it out of their histories; elsewhere through
Flutter's clipboard. Emptied 60 seconds later if the clipboard still holds
it. The recovery phrase and codes stay never copied.
The code's field counted "/7", taking an optional space for a seventh
character: it now takes six digits alone, a pasted space dropped, and counts
nothing.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Each of the three fields suggests the words of BIP-39's whole English
list beginning with what is typed, never the phrase's own, and refuses a
word not on it as its field is left, so that a typo is caught before the
words are compared.
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 developer's decisions of 26 Oct (D1-D5) and the calls made
building it; notes in ADR 0017 (point 10) and ADR 0021 (D54) on what
it amends; Learn's AGENTS.md on the sidecar and the 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>
Every account signs in with SimpleLogin or a password now, so GitHub
goes from the module, the shared app package, Learn and Todo, ahead of
ADR 0017's GITHUB_SIGN_IN_ENDS.
- halkyon_base: no `gitHubSignIn` endpoint, GitHub identity provider or
GitHub refusals; no `githubClientId`/`githubClientSecret`, no
`GITHUB_SIGN_IN_ENDS` and no `forgetGitHubAccounts`; the register
loses `account-with-github`. `SignInWays.gitHub`, the basics'
`gitHubClientId` and `gitHubSignInEnds`, and `PasswordRefusal`'s
`signInAgain` and `noAddress` go. A first password takes a code
mailed to the person's own address; an account without one sets none
(`wrongCredentials`).
- Learn's server: `instance.info()` without `gitHubClientId`, the
pruning without GitHub, and `minimumAppBuild` 24, as builds up to 23
(v0.20.0) require `SignInWays.gitHub`: the server deploys with the
release of build 24.
- halkyon_app: no GitHub button or problems on the start screen, no
password offered after a GitHub sign-in, and `ServerpodAuthGateway`
without the browser half only GitHub used (`(client, base:)`). The
account section offers a first password only to an account with an
address. `LoopbackWebAuth` and the apps' schemes stay, SimpleLogin's
ways back.
- Learn's Profile lists no GitHub; the texts go (English, German).
- Serverpod's `serverpod_auth_idp_github_account` stays, as its
migrations make it; a row goes with its account, and ADR 0020's D36
gives operators the SQL to delete those left.
- deploy/: compose.yaml and .env.example without GitHub. The READMEs,
AGENTS.md files and ADR 0017 amended.
BREAKING CHANGE: builds up to 23 can't read the instance's answers
about an account's ways in; minimumAppBuild is 24.
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 server's half of D25: every account has a way in, and the anonymous
accounts left from before go with the daily pruning.
- The module signs nobody in anonymously: `anonymousIdp` and
`gitHubUpgrade` are gone, and so is linking GitHub at the register.
- A password is set only by someone whose address is theirs (a
`firstPassword` code) or who signs in with GitHub alone (a fresh
sign-in and a `signUp` code); an anonymous account is refused
`wrongCredentials` before any code is used.
- SimpleLogin refuses to link onto a caller without `identified`
(`wrongCaller`), the member's endpoint too, so nothing turns an
anonymous account into one with a way in.
- `pruneAnonymousPeople` deletes every anonymous account left, however
new, never one identified. Learn and Todo schedule it as
`prune-accounts` and cancel the old `prune-abandoned-anonymous-people`
entry once.
- Learn: someone without `identified` keeps no files;
`FILE_LIMIT_ANONYMOUS_MB` is gone. `minimumAppBuild` is 23, as builds
up to 22 start with an anonymous account.
- Learn's sync tests make their person and session by SQL in the
development database, as Serverpod stores sessions.
- Docs, store listings and ADRs 0010, 0014, 0016, 0017 and 0019 amended.
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 developer's decisions of 21 Oct: private studysets ship with build 22;
a data key per private studyset and a personal key for tags and settings,
sealed to the account and kept in a synced table; files encrypted too; a
release's tag names and the copies counted come from the device; the shape,
size and rhythm of studying stay readable and are listed; existing
studysets get one offer; accounts without keys at the register wait for a
password. ADR 0002 and ADR 0017 point to 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>
ADR 0017's rules as they stand, halkyon_app's README and Learn's
AGENTS.md: where an instance offers passwords, the apps offer no Add GitHub
and no hint on adding it, an anonymous person's Sign in with GitHub reaches
only the account someone has, and every refusal says why.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017 gets "The short reading": its findings, the developer's four
decisions of 21 Oct, and what changed. "The rules as they stand" says a
reset takes effect 14 days after it was asked at the latest, that a member
keeps the session a reset signed in and deletes nobody while the register
is out of reach, and no longer claims every secret is kept out of every
capture: Android holds them back, Windows from 10 2004, macOS from
screenshots but not ScreenCaptureKit on macOS 15 and later, iOS covers
the app switcher's picture alone, Linux nothing. The module's and
halkyon_app's READMEs and Learn's AGENTS.md 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>
ADR 0017 gets "Reading the fixes (21 Oct 2026)": each finding and what
was done, and "The rules as they stand" brought up to date (resets take
effect once 72 hours outside hold-outs passed and lapse 30 days after
they were asked; GitHub-only accounts go 30 days after the end; a member
takes the register's moment by its own clock; nothing secret copied on
the device). The module README and Learn's AGENTS.md say the same.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017's full-reading part says what the device's fixes did: the
clipboard, plain HTTP refused but on this machine, sheets never left busy,
what Save leaves, secrets out of debug logs, keyboards, screenshots and
backups, memory, and the real cryptography against the register's checks.
halkyon_app's README says what an app must add (its activity's screen
guard), Learn's AGENTS.md the HTTPS rule for instances.
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 full reading's part in ADR 0017 records the device's medium 1 as done
(the identity's purpose and digest, the base URL in place of the host, an
instance under a path taking no password sign-in), and "The rules as they
stand" says what "password" binds; the module's and halkyon_app's READMEs
say the same.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017's "Full reading (21 Oct 2026)": each server finding and what was
done (H1, M1, M2, M3, L1, L4, L5, L6, L7, L10), those accepted with their
reasons (L2, L3, L8, L9), and the device's M1, the owner's proof bound to
its operation and the whole base URL, still to do. "The rules as they
stand" brought up to date; the module README and Learn's AGENTS.md too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017 records what the fourth reading found and what was done, and
states who changes what of an account with which proofs, as a table the
full reading can check against; the module README and Learn's AGENTS.md
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>
A key proof was a signature by the account's signing key, which every
signed-in device keeps in its keyring: whoever could read one, with a
code from its authenticator, set a new password without the password or
the phrase (the second reading's H1). The phrase now proves itself with
an Ed25519 key derived from its bits alone (halkyon_keys'
recoveryProofKeysOf, KDF context hlkrprf1, a sibling of the recovery
key), whose public half every setup, new phrase and account reset sends
and the register keeps (account_password.recoveryProofKey); the device
derives the secret half only while the phrase is typed. An account
without one (none exist outside development) proves no phrase until it
sets a new one; decoys check against a decoy proof key alike.
Migration (module, Learn's and Todo's servers, Learn's device schema):
ALTER TABLE "account_password" ADD COLUMN "recoveryProofKey" bytea;
nullable, so rows made before keep working and no data is touched.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
PasswordKdf.fromJson refused costs below the floor but took any above it,
so an instance could ask a device for 100 GiB and crash the app at every
sign-in. It now refuses more than the register's own ceiling (16 passes,
1 GiB; KeyRefusal.excessivePasswordKdf), and the app reads either refusal,
before deriving or sending anything, as PasswordProblem.unsafeCosts with
a text of its own (before, costs below the floor read as keys missing).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
password.setRecoveryKeys took a session and a TOTP code alone, so a phone
signed in with its authenticator beside it could set a phrase of its
holder's own and, through the phrase's reset, a new password, never
knowing the old one. It now takes the old password's SRP proof (from
beginChange, the caller's own) and a TOTP or recovery code, as changing
the password does: one owner proof for both (_proveOwner), forwarded by
members, asked for in the account section's New recovery phrase.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017's step-3 section: codes by mail sign nobody in, the ways in
for accounts without a working password, changes while signed in,
sessions ended in every service, the apps' screens (the QR package and
the alternatives considered), the keys in the keyring, anonymous
people's keys waiting for step 4, and libsodium on devices (results
copied before they leave an isolate; a C compiler and make for every
build). The module's and halkyon_app's READMEs and the AGENTS files say
the same; the snap's build installs make for sodium's build hook.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017: the account's reset without the phrase waits 72 hours, as the
developer confirmed; adding an authenticator takes a code from one
confirmed before; a password set up for good stays through resets; and
per-network limits count by the visitor's address behind a trusted proxy.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
ADR 0017 records the decisions taken in building (SRP's identity, the
decoys, the 72-hour account reset proposed for confirmation, GitHub's
deprecation) and what step 3 must do; the module's README and the
AGENTS files say how password sign-in works.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Other spaces become a plain space and the text is composed (NFC) before
Argon2id, so a password typed on another system, accents composed or
not, unlocks the same keys; empty passwords and control characters are
refused. The normalisation (unorm_dart) is pinned exactly, as it must
never change once an account exists. ADR 0017 records both decisions.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
SRP-6a with Argon2id, the password never leaving the device and
unlocking the account's key pairs (libsodium on devices); mandatory
TOTP with recovery codes, a 72-hour reset by mail as Proton has it, a
recovery phrase; data keys per store sealed to the account; studysets
private or not, private by default; email codes only for resets;
GitHub sign-in deprecated.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
