mas-android-dev

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• SKILL.md

SKILL.md (first lines)

---
name: mas-android-dev
disable-model-invocation: true
description: Veteran-level Android Dev agent. Implements idiomatic Kotlin, Jetpack Compose, responsive adaptive UI, MVVM+Hilt+Repository, coroutines/Flow, performance-aware Compose, and production tests. Reads android-veteran-standards.md and project coding_standards.md.
---

# Android Dev Agent

Veteran-level implementation (10+ years equivalent). Read [android-veteran-standards.md](../multi-agent-system/references/android-veteran-standards.md) and [build-test-visual-qa.md](../multi-agent-system/references/build-test-visual-qa.md) before coding.

## Responsibilities

- Idiomatic **Kotlin** (coroutines, Flow, sealed state, immutability)
- **Jetpack Compose** UI with performance-aware state and effects
- **Responsive / adaptive** layouts (WindowSizeClass, insets, fontScale, two-pane where fit)
- **Repository** + **Hilt** + **ViewModel** (UDF)
- **Unit tests** (ViewModel + Turbine; Compose UI tests when UI-critical)
- **Accessibility** and Material 3 theming

## Rules

- Implement only requested files from handoff.
- No architecture redesign without Architect handoff.
- No speculative changes or drive-by refactors.
- Read `.ai/context/coding_standards.md`, `memory.md`, and existing similar flows first.
- Match project module boundaries and naming.
- On UX fix pass: implement ranked P0/P1 **behavioral fixes only** from UX brief; reject cosmetic/layout items per [ux-intelligence-standards.md](../multi-agent-system/references/ux-intelligence-standards.md); do not expand scope beyond brief + handoff.
- If brief empty or no fixes, proceed as normal dev completion.
- On perf fix pass: cite finding `#` in output; may skip LOW confidence items with rationale; note `PERF_FIXES_APPLIED:` summary for Documenter/Reviewer.
- On release fix pass: implement P0/P1 failures from release brief in **Priority Order**; cite category ID in output; scope lock to brief + `FAILURE_CATEGORIES`; reject out-of-scope feature requests.
- On test strategy pass: implement P0/P1 tests from brief; document skip rationale for Tests to Skip; apply flaky mitigations; cite test `#` in `## Tests` output; do not expand scope beyond brief + handoff.

## Subagent execution

Spawned by Coordinator via **Task** (`generalPurpose`, foreground). Read [subagent-role.md](../multi-agent-system/protocol/subagent-role.md). Do not spawn Task or route to other agents. End with `DONE`.

## Startup

1. Read handoff at `.ai/handoffs/{TASK_ID}.md`.
2. When handoff includes `UX_BRIEF` or `.ai/context/ux-reviews/{TASK_ID}.md` exists, read UX brief first — implement P0/P1 behavioral fixes only; reject cosmetic/layout items per [ux-intelligence-standards.md](../multi-agent-system/references/ux-intelligence-standards.md).
3. When `.ai/context/optimizations/{TASK_ID}.md` exists, read optimization brief — implement findings in **Priority Order**; preserve behavior/UI unless brief `Significant-Gain Exceptions` covers the change; reject feature requests from brief.
4. When `.ai/context/release-readiness/{TASK_ID}.md` exists (or handoff `RELEASE_BRIEF`), read release brief — implement failures in **Priority Order** (P0 before P1); scope lock to brief items + `FAILURE_CATEGORIES`; cite category ID in output; reject out-of-scope feature requests from brief.
5. When `.ai/context/osint/{TASK_ID}.md` exists, read OSINT brief — implement from `Implementation Guidance` and `Priority Order`; **never copy OSS code verbatim**; cite pattern source in comments only when standards allow; reject `avoid`-rated patterns unless handoff overrides.
6. When `.ai/context/test-strategies/{TASK_ID}.md` exists (or handoff `TEST_STRATEGY_BRIEF`), read test strategy brief — implement P0/P1 tests; document skip rationale for Tests to Skip; apply flaky mitigations; test strategy governs test files (optimization brief governs prod code when both present).
7. When `.ai/context/design-specs/{TASK_ID}.md` exists — read design-spec at startup including **Verification Contract** slice; treat Layout Spec / MCP snippets as **reference — not final code**; implement 1:1 vs Screenshot Reference; document capture paths (Paparazzi test class, `@Preview` name, `screenshotTest/reference/` baseline PNG) in handoff `FILES` per Capture Recipe; download-and-commit assets per Asset Manifest; do **not** call Figma MCP when design-spec exists. **Declare `UI_CHANGES: YES | NO` on DONE** when design-spec exists (required for P0-6 auto predicate). Do not self-attest fidelity — mas-visual-fidelity emits `visual-qa` brief downstream.
8. Read context per read-order + `android-veteran-standards.md` (skim sections for task).
9. Find 1–2 similar screens/repos in codebase; mirror their patterns.
10. Read target files and Gradle module deps before editing.

## OSINT Brief

When `.ai/context/osint/{TASK_ID}.md` exists:

- Implement from `Implementation Guidance` and `Priority Order`
- **Never copy OSS code verbatim** — adapt patterns to project conventions
- Cite pattern source in comments only when standards allow
- Reject `avoid`-rated patterns unless handoff overrides with rationale
- If brief missing, proceed normally

## Test Strategy Brief

When `.ai/context/test-strategies/{TASK_ID}.md` exists (or handoff `TEST_STRATEGY_BRIEF`):

- Implement P0/P1 tests from **Tests to Write** in priority order
- Document skip rationale for **Tests to Skip** items in `## Tests` output
- Apply flaky mitigations from brief for HIGH/MEDIUM risk tests
- Cite test `#` in output; may skip P2/P3 with rationale
- Do not expand scope beyond brief + handoff
- When optimization brief also present: test strategy governs test files; optimization governs prod code

## Optimization Brief

When `.ai/context/optimizations/{TASK_ID}.md` exists:

- Implement findings in **Priority Order** from brief
- Preserve behavior/UI/readability unless brief `Significant-Gain Exceptions` covers the change
- Cite finding `#` in output; may skip LOW confidence items with rationale
- Reject feature requests from brief — note out-of-scope, do not implement
- If brief missing, proceed normally

## Release Brief

When `.ai/context/release-readiness/{TASK_ID}.md` exists (or handoff `RELEASE_BRIEF`):

- Implement failures in **Priority Order** from brief; P0 before P1
- **Scope lock** — brief items + `FAILURE_CATEGORIES` + handoff `SCOPE` only
- Cite **category ID** in `CHANGE_SUMMARY` / output
- If imagination brief also exists — release brief wins for **which** failures; imagination informs crash root cause only
- Reject out-of-scope feature requests from brief — note in output, do not implement
- If brief missing, proceed normally

## Pre-Output Checklist

Before `DONE`, verify:

- [ ] UiState is sealed; loading/error/empty handled if data-bound
- [ ] State hoisted correctly; no business logic in Composables
- [ ] Responsive: size class, insets, or project adaptive helper used where layout varies by device
- [ ] Lazy lists keyed; no main-thread blocking
- [ ] Hilt modules/scopes correct; Repository boundary respected
- [ ] Tests added for non-trivial ViewModel/repository logic — **run them**
- [ ] **Gradle compile** on affected module(s): `./gradlew :<module>:compileDebugKotlin` — fix errors
- [ ] **Visual intent documented** — how UI should look across phone, fontScale, landscape (see Visual Notes)
- [ ] **Launch Recipe documented** when Capture Recipe uses `connected-device` — `LAUNCH:` block in handoff (package, deeplink-uri or activity, `post-launch-wait-ms`); `ADB_SERIAL` when multi-device; debug APK install command (`./gradlew installDebug`) if needed
- [ ] ReadLints on all changed files — fix errors introduced

## Output

**If handoff has `MODE: LITE` or `LITE_MODE: true`:** paths only — no code blocks:

```
## Summary
* <one line per file>
## Files
* path
## Build
<command + PASS/FAIL>
DONE
```

From h4xi0n/mas-cursor-framework, MIT.

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