android-performance
Optimize Android app startup, UI rendering, and frame stability with Baseline Profiles and lazy initialization. Use when reducing startup time, diagnosing jank, or improving rendering performance.
58
68%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/android/android-performance/SKILL.mdQuality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a well-crafted skill description that concisely covers specific capabilities (startup optimization, UI rendering, frame stability), names concrete techniques (Baseline Profiles, lazy initialization), and provides explicit trigger conditions. It uses proper third-person voice and includes natural developer terminology that would facilitate accurate skill selection.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'optimize Android app startup, UI rendering, and frame stability' along with specific techniques like 'Baseline Profiles and lazy initialization'. These are concrete, actionable capabilities. | 3 / 3 |
Completeness | Clearly answers both what ('Optimize Android app startup, UI rendering, and frame stability with Baseline Profiles and lazy initialization') and when ('Use when reducing startup time, diagnosing jank, or improving rendering performance') with explicit trigger guidance. | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'startup time', 'jank', 'rendering performance', 'Baseline Profiles', 'lazy initialization', 'Android app', 'UI rendering', 'frame stability'. These cover common terms developers use when discussing Android performance. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive with a clear niche: Android performance optimization specifically around startup, rendering, and frame stability. The mention of 'Baseline Profiles', 'jank', and 'lazy initialization' makes it very unlikely to conflict with other skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
37%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
The skill provides a reasonable high-level overview of Android performance optimization areas but lacks the concrete, executable guidance needed for a strong skill. Key weaknesses are the absence of code examples (especially for Baseline Profile generation and lazy init patterns), no measurement/validation workflow, and redundant content between the main sections and the Anti-Patterns section. The referenced implementation file is missing from the bundle, undermining the progressive disclosure structure.
Suggestions
Add executable code examples for key operations: Baseline Profile generation (benchmark module setup + BaselineProfileRule), lazy initialization with App Startup library, and LazyColumn with stable keys.
Define a clear workflow with validation: profile baseline metrics → apply optimization → re-measure → verify improvement threshold (e.g., using Macrobenchmark).
Remove the 'Anti-Patterns' section since both points are already covered in sections 2 and 3, or consolidate them into a single location.
Provide the referenced 'references/implementation.md' bundle file or inline the critical patterns if the file doesn't exist.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Mostly efficient but has some redundancy — the 'Anti-Patterns' section repeats points already made in sections 2 and 3 (nested weights, Activity context in Singletons). Some guidance like 'Use Layout Inspector to find unnecessary recompositions' is somewhat generic knowledge Claude would already have. | 2 / 3 |
Actionability | Provides specific tool/library names and directional guidance (Baseline Profiles, App Startup, Coil/Glide, LazyColumn keys) but lacks executable code examples. No concrete code snippets for generating Baseline Profiles, lazy initialization patterns, or LazyColumn key usage — these are described rather than demonstrated. | 2 / 3 |
Workflow Clarity | No clear sequenced workflow or validation checkpoints. The content is organized as a checklist of best practices rather than a step-by-step process. For performance optimization tasks (which involve profiling → identifying issues → fixing → validating improvement), there's no measurement/validation loop described. | 1 / 3 |
Progressive Disclosure | References to 'references/implementation.md' are present and clearly signaled, showing intent for progressive disclosure. However, no bundle files were provided, meaning the referenced file doesn't exist, and the same link is used for two different topics (lazy initialization patterns and LazyColumn optimization), making navigation unclear. | 2 / 3 |
Total | 7 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 9 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
metadata_version | 'metadata.version' is missing | Warning |
metadata_field | 'metadata' should map string keys to string values | Warning |
Total | 9 / 11 Passed | |
- Repository
- HoangNguyen0403/agent-skills-standard
- Commit
3df717f
- Reviewed
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