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fix(android): threads show their model and effort without opening the keyboard - #25881

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shihasbacker wants to merge 3 commits into
pingdotgg:mainfrom
shihasbacker:codex/fix-android-composer-selector
Open

shihasbacker wants to merge 3 commits into
pingdotgg:mainfrom
shihasbacker:codex/fix-android-composer-selector

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@shihasbacker

@shihasbacker shihasbacker commented Oct 27, 2026 •

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Problem

On Android, you can't tell which provider and model a thread is using unless you focus the composer and open the keyboard. This applies whether you open a new thread or return to one that is already running. Until then the composer shows only the text field, so there's no way to tell whether the thread is on the model you picked or the default.

This gets painful when several threads run on different models. To check which model a thread uses before sending a follow-up, you have to tap into the composer in every thread. iPhone already shows the model in this state; Android doesn't.

Fix

Android only; iPhone is unchanged.

  • Unfocused: the single-row composer now always shows the provider icon, the model name, and a short effort label (M, H, XH, taken from the selected option), followed by the chevron. Fast is left out here, matching iPhone. Screen readers still hear the full model and effort names.
  • Focused: focusing the input switches to the two-row layout (text on top, toolbar below), as in Android 2.0.0. The toolbar shows the full effort and Fast (only when Fast is on). When the full labels don't fit, for example on a narrow phone with a large font, the toolbar falls back to the short effort plus Fast and truncates the model name. Previously it showed GPT-6-… Medium ….
  • Typing, multiline growth, attachments, send/stop, and the settings sheet keep their existing behavior.

The short effort labels come from a shared buildTraitsTriggerDisplay helper in client-runtime, which now also returns them. Unknown effort names are kept whole rather than guessed.

Scope and approval

No prior issue or discussion. This is submitted under the small, focused bug-fix exception: on Android the composer hides the selected model whenever the input is unfocused, so you can't tell which model a thread uses without opening the keyboard, while iPhone shows it in the same state. The PR fixes only that, in the Android composer's model control (ThreadComposer, ComposerModelControl, ComposerToolbar), plus a small shared helper for the short effort labels. iPhone layout, settings, and provider rules are unchanged. Happy to open an issue first if maintainers prefer.

Before / after

Screenshot
Before (Android 2.0.0): no model until the keyboard opens
After, unfocused
After, focused (Extra High + Fast)
After, 343dp width, font scale 1.3, unfocused
After, 343dp width, font scale 1.3, focused (fallback)

Verification

How I proved it: checked on an Android emulator (isolated dev server, GPT-6.1 Terra, Extra High, Fast on) against the head commit, plus a new focused test.

  • Emulator (sdk_gphone64_arm64, 1080×2400 at 420dpi, and 900×2400 ≈ 343dp at font scale 1.3):
    • Unfocused: 6.1 Terra XH.
    • Focused: 6.1 Terra Extra High Fast.
    • Narrow + large font: 6.1 Ter… XH unfocused, and 6.1 Terra XH Fast focused.
  • An earlier emulator pass on the first commit also covered:
    • Idle, running, interrupted, completed, and reopened threads.
    • Switching between threads on different models, where each showed its own model.
    • Opening model settings during a running turn.
    • Two effort values, Fast on → off (the effort stays), attachments, send/stop, and dismissing with Android Back.
  • vp test run packages/client-runtime/src/modelTraits.test.ts covers the effort abbreviations, unknown labels, and Fast on/off.
  • vp run check:changed upstream/main passes (format, lint, knip, typecheck, tests).

Not checked: queue resume, T3 dictation, provider-change restrictions during an active task, and physical Android tablets.

@github-actions github-actions Bot added vouch:unvouched PR author is not yet trusted in the VOUCHED list. size:L 100-499 changed lines (additions + deletions). labels Oct 27, 2026
@macroscopeapp

macroscopeapp Bot commented Oct 27, 2026

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Approvability

Verdict: Approved at adaf098

Macroscope's review found this PR approvable — This is a localized Android composer UI fix that exposes existing model and effort data, with optional layout behavior and no changes to product defaults or static-analysis configuration. Existing shared label behavior and iOS paths remain intact, and the new trait formatting is covered by tests.

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coderabbitai Bot commented Oct 27, 2026 •

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Review in Change Stack →

No actionable comments were generated in the recent review.

Recent review info
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Reviewing files that changed from the base of the PR and between adaf098 and 89341c8.

Files selected for processing: 1
  • apps/mobile/src/components/ComposerModelControl.tsx
Files skipped from review as they are similar to previous changes: 1
  • apps/mobile/src/components/ComposerModelControl.tsx

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 8 remain after this review.

Walkthrough

The change adds compact trait metadata and width-aware rendering to the mobile model control. On Android, the thread composer adjusts editor expansion and toolbar sizing based on focus and measured width.

Changes: Composer sizing and trait display

Layer / File(s) Summary
Compact trait metadata
packages/client-runtime/src/modelTraits.ts, packages/client-runtime/src/modelTraits.test.ts
buildTraitsTriggerDisplay now returns compact effort and speed labels. Tests cover known abbreviations, unknown effort labels, and fast-mode output.
Width-aware model control
apps/mobile/src/components/ComposerModelControl.tsx, apps/mobile/src/components/ComposerToolbar.tsx
ComposerModelControl measures the full control when fitWidth is set and uses compact trait content when it exceeds the available width. ComposerInlineControl can keep its suffix from shrinking.
Android composer sizing
apps/mobile/src/features/threads/ThreadComposer.tsx
On Android, the composer forces the compact editor expanded while focused, measures the expanded toolbar width, and applies platform-specific minimum-width and model-control settings.

Priority: Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant ThreadComposer
  participant ComposerModelControl
  participant buildTraitsTriggerDisplay
  participant ComposerInlineControl
  ThreadComposer->>ComposerModelControl: supplies compact mode and available width
  ComposerModelControl->>buildTraitsTriggerDisplay: gets trait labels
  ComposerModelControl->>ComposerInlineControl: renders selected summary and suffix
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Possibly related PRs

Suggested reviewers: maria-rcks, juliusmarminge

Merge Risk: Minimal · up to 89341

The Android composer change is ready to merge after normal checks.

Pre-merge checks: Passed 4
Check name Status Explanation
Title check Passed The title clearly and concisely describes the main Android fix: showing the thread model and effort without opening the keyboard.
Description check Passed The description covers the problem, expected behavior, implementation scope, approval exception, before/after evidence, verification steps, test results, and unverified scenarios. It is specific and a…
Linked Issues check Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check Passed Check skipped because no linked issues were found for this pull request.
Full details: Description check

Explanation

The description covers the problem, expected behavior, implementation scope, approval exception, before/after evidence, verification steps, test results, and unverified scenarios. It is specific and aligned with the requested change.

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Actionable comments posted: 1


  • 🪄 Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix review comments
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @apps/mobile/src/components/ComposerModelControl.tsx:
- Line 90: Update the suffix sizing behavior in ComposerModelControl so compact
Android mode keeps known short abbreviations fixed but allows long or unknown
effort labels from buildTraitsTriggerDisplay to shrink or truncate, preserving
room for the model label.

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Reviewing files that changed from the base of the PR and between e109dc8 and adaf098.

Files selected for processing: 5
  • apps/mobile/src/components/ComposerModelControl.tsx
  • apps/mobile/src/components/ComposerToolbar.tsx
  • apps/mobile/src/features/threads/ThreadComposer.tsx
  • packages/client-runtime/src/modelTraits.test.ts
  • packages/client-runtime/src/modelTraits.ts

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