iris is the framework alone; the app is one crate in app-rust/

Iris: "the organization of the rust rewrite is a mess right now... there
shouldn't be anything related to the app inside of iris. Iris is supposed
to be the UI framework alone." And, on the crate count: "I'm confused why
the app only code needs more than one crate though."

Nine cargo workspaces become three, and the port's project code -- which
sat in five places, four of them inside the framework -- becomes one crate,
`ai-app`, in `app-rust/`:

  client-core                -> app-rust/src/client
  iris/transcript-ui         -> app-rust/src/ui
  iris/transcript-fixture    -> app-rust/src/ui/fixture.rs + tests/ + touch/
  iris/desktop-app           -> app-rust/src/desktop + src/bin_desktop.rs
  iris/android-app           -> app-rust/src/android + android-project/
  android-shell              -> app-rust/src/shell

iris/ keeps core, macro, the iris crate, tabs-ui and rig-input, and now
mentions no session, transcript, setup or server anywhere.

Only two of the old splits had a reason that survived reading. event-model
stays a crate at the repo root because server/ depends on it too, so a
crate is what makes the backend and the app agree by construction. The two
Android .so names looked like a hard constraint -- a package produces one
library artifact -- until P2 turned out to already plan merging those two
Android apps into one; both faces now come out of libai_app.so, picked
apart by features so `--no-default-features --features shell` keeps wgpu,
parley and iris out of the Compose app's APK. docs/RUST.md's "One app
crate" has the rest, including what each remaining feature is for.

DECISIONS.md and SUBAGENTS.md move into docs/ with everything else.

Verified: ./run-tests.sh and `cd iris && cargo test` green, clippy and fmt
clean in all five workspaces, `cargo ndk -t x86_64` links libai_app.so,
build-apk.sh produces an APK that installs and launches on this checkout's
emulator (Gl ... virgl, as expected), and the phone-sized headless
screenshot renders the transcript unchanged.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

benches/report_to_touch.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+"""Turns `iris::input` debug lines -- from a phone's diagnostics report, or
+from a report the layer-1 harness produced with tracing on
+(`iris::diagnostics::set_trace(true)`) -- back into a `TouchScript` file
+`iris::harness::Harness::replay` can play back at layer 1.
+
+Why this exists: `docs/RUST.md`'s "Three test layers" box says the cheapest
+layer that can answer a question wins, and a gesture that misbehaves on
+Iris's phone is otherwise only describable in words. `iris::sense::
+log_input_event`'s one line per platform event (Android's on_touch_event
+once per `MotionEvent`, with historical samples inline; winit's once per
+pointer `WindowEvent`; the harness's `touch`, once per script line) already
+carries everything a `.touch` file's `t_ms action x y` needs -- this just
+reads it back out and reconstructs the samples in order, expanding each
+event's inline historical samples into their own `move` lines first (they
+are always intermediate positions of a move, and Android documents them as
+oldest first, which is also the order they appear in the line).
+
+Usage:
+    report_to_touch.py < report.txt > replay.touch
+    report_to_touch.py report.txt > replay.touch
+
+Only lines containing "iris input: action=..." are read; everything else in
+the report (insets, frame timings, drag-release summaries) is ignored, so
+this can be pointed at Copy report's whole clipboard text directly.
+"""
+
+import re
+import sys
+
+# The message half of `sense::log_input_event`'s format string, prefix-
+# agnostic: a real report line also carries the ring's own
+# `HH:MM:SS.mmm LEVEL target:` header (`LogLine::format`) or, forwarded
+# through `ai_server::client_log`, a `[<source> <clock> #<seq>]` tag ahead
+# of that -- neither of which this needs to understand, since `search`
+# (not `match`) finds the marker wherever it starts.
+LINE_RE = re.compile(
+    r"iris input: action=(?P<action>\w+) x=(?P<x>-?[0-9.]+) y=(?P<y>-?[0-9.]+) "
+    r"t=(?P<t>[0-9]+)ms history=(?P<hist>[0-9]+)(?P<rest>.*)$"
+)
+# One historical sample inside `rest`: `t:x,y`, space-separated, oldest first
+# -- see `log_input_event`'s own doc for why order matters.
+HIST_RE = re.compile(r"(?P<t>[0-9]+):(?P<x>-?[0-9.]+),(?P<y>-?[0-9.]+)")
+
+
+def _fmt(value: float) -> str:
+    """The number as `TouchScript::parse`'s own `f32::parse` would round-trip
+    it -- an integer without a trailing `.0` where the source was one
+    (every coordinate here is a physical pixel), `{:g}` otherwise so a
+    fractional value from a real device is not silently truncated."""
+    if value == int(value):
+        return str(int(value))
+    return f"{value:g}"
+
+
+def convert(lines):
+    """Every `iris::input` line, oldest first, expanded to one `(t_ms,
+    action, x, y)` tuple per touch sample -- a historical sample is always
+    an intermediate `move`, and the event's own sample keeps its real
+    action (`down`/`move`/`up`/`cancel`)."""
+    rows = []
+    for line in lines:
+        m = LINE_RE.search(line)
+        if not m:
+            continue
+        hist_count = int(m.group("hist"))
+        hist_matches = list(HIST_RE.finditer(m.group("rest")))
+        if len(hist_matches) != hist_count:
+            print(
+                f"report_to_touch: {line.strip()!r} says history={hist_count} but "
+                f"holds {len(hist_matches)} samples -- skipped",
+                file=sys.stderr,
+            )
+            continue
+        for hm in hist_matches:
+            rows.append(
+                (int(hm.group("t")), "move", float(hm.group("x")), float(hm.group("y")))
+            )
+        rows.append(
+            (int(m.group("t")), m.group("action"), float(m.group("x")), float(m.group("y")))
+        )
+    return rows
+
+
+def main():
+    if len(sys.argv) > 2:
+        print("usage: report_to_touch.py [report.txt] < report.txt", file=sys.stderr)
+        return 2
+    text = open(sys.argv[1]) if len(sys.argv) == 2 else sys.stdin
+    for t_ms, action, x, y in convert(text):
+        print(f"{t_ms} {action} {_fmt(x)} {_fmt(y)}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())