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# Decisions taken for Iris to review
Short list of design choices made by the design agent without asking, so
they can be judged and reversed later. Detail lives in RUST.md (and IRIS.md
for iris API changes); this file is only the summary. Newest first. Items
marked **DEFERRED** are ones the agent chose not to decide alone.
## 2026-09-05
- **Touch drag on a transcript row follows Android's own rule**: a vertical
drag pans the list immediately; a stationary press held 500 ms starts a
text selection which further dragging extends; a horizontal drag while
something is already selected extends that selection without the wait.
One `DragArbiter` per list decides it (`iris/src/sense.rs`). Chosen over a
"text layer always wins" or "list always wins" rule because either loses
one of the two gestures a reader expects.
- **E4's desktop shape is a new `iris/desktop-app` crate**: a winit window
holding `transcript-ui`'s screen beside a session list, talking to a real
`ai-server` through `client-core`. It enrols by pasting the same
`aiapp://enroll?…` link a phone scans (`client-core::config::EnrolledServer`)
and keeps it owner-only under `$XDG_CONFIG_HOME/ai-app-desktop/`. The
pinned CA is a path given on the command line, not baked in. Chosen so
the phone and desktop share one enrolment format and no second one is
invented.
- **Order of remaining work**: finish the two in-flight pieces above, then
the transcript screen's Android integration and the `transcript-bench.sh`
comparison against Compose — the numbers the recommendation still lacks.
- **DEFERRED — whether to commit to iris over Masonry for `ai-app`.** Waits
on the bench numbers above; RUST.md's recommendation says what the
measurements must show.