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mantra-kmp/docs
Kgothatso Ngako b6aa2111ac docs: record what phase 7 built, including the API the plan named that does not exist
Phase 7 becomes a record. Three things in it are corrections to the plan rather
than notes on it, and all three are the kind that only surface once somebody
tries:

- `MotionSchemeKeyTokens`, which the plan says every spec should come from, is
  `internal` to material3 and not addressable from an app. `MaterialTheme.motionScheme`
  is the public surface and gives the same six specs.
- "every state change in the app is a hard cut" was true of screen states and not
  of navigation, whose default is a 700ms fade in navigation-compose's internals.
  Still worth replacing -- three times M3's duration, and a literal in a
  dependency -- but for a different reason than the one written down.
- Android has no reduce-motion setting. It has "Remove animations", which zeroes
  the animation duration scales, and Compose ignores those scales entirely.

Also what was deliberately left: the container transform between a list item and
its detail screen. It is `SharedTransitionLayout` work, and above the expanded
breakpoint the detail is already beside the list, so there is no container to
transform -- doing it before the pane split settles means writing it twice.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-08 08:16:46 +02:00
..

mantra docs

Notes on the parts of this app whose behaviour is not recoverable by reading the code alone — where the reasoning lives in a protocol, a failure mode that is silent, or a decision that looked arbitrary and was not.

document covers
shared-key-ceremony.md ChillDKG over NIP-17: the rounds, the approval gates, the chat transcript, participant ordering
shared-key-derivation.md deriving further keys from the group's threshold key with FROST tweaks — why not BIP32, why no chain code, and the one rule that must not be broken
frost-batch-signing.md signing several events in one ceremony — why one nonce can never cover two messages, and the phased schema, wire and UI work that follows from it
marmot-membership.md how members join an MLS group, and the epoch race that makes a missing member look like a successful invite
member-chronicle.md handing a member added after the work was done the group's signed record — why the events are not on the wire at all, and why the room's id is enough to verify them
marmot-direct-messages.md a one-to-one message inside a group as a stock NIP-59 gift wrap — what its MIP-03 carve-out costs, why the sender cannot read their own, and the one query that would broadcast it
mls-skipped-keys.md why a group event that arrives a moment late is dropped for good, which flows trigger it, the quartz fix, and the partial mitigation in this app
long-running-sync.md the chat subscriptions that stay open instead of pulling once per screen — why the request queue could not simply hold one, and how the group filter follows the room list
dead-code.md code in the sync and relay stack that nothing calls, why each piece is still there, and which of it is a bug rather than a leftover
jvm-target.md what desktop support cost, phased — why the native chain was already done, why an empty source set in our phoenix fork was the real blocker, and why DAO tests need none of it
material-design-conformance.md what the M3 foundations actually require, measured against all 43 screens — the colour pairing that renders the app's own proposals invisible, and eight phases that put the decisions back in the theme

Start with the ceremony if you are new to this area; the Marmot notes all assume it. Read the skipped-keys note before debugging any "the other device never got it" report — it is silent, and it looks like every other kind of delivery failure. The sync note stands alone, and the dead-code inventory reads as a follow-up to it. The batch-signing note is a phased plan that has been built: read it after the derivation note, whose one rule is the same one it is built around. The member chronicle note is a phased plan that has not been built, and reads as the membership note's unanswered half: what a member who joins late can be given, and the one thing they cannot. The jvm-target note is unrelated to all of them: it is a build and packaging story. The Material Design note is a phased plan that has not been built, and is the only one about what the app looks like rather than what it does; read the jvm-target note first if you want to know why its adaptive-layout phase exists.