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anr-audit-and-fix

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Audits Android codebases for ANR risks and diagnoses ANR stack dumps. Use this skill when scanning Android code for ANR risks or triaging ANR stack dumps. Don't use for non-ANR crashes, dropped frames, general CPU profiling, or Perfetto system traces.

performance/anr-audit-and-fix/SKILL.md

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Nov 5, 2026
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Apache-2.0

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Select the execution path matching the user's request:

## 1. Path A: Static codebase ANR risk audit

When auditing source files or scanning for thread-blocking operations:

- Follow [references/risk_analysis_guide.md](references/risk_analysis_guide.md) step by step: list candidates, **prove the executing thread** (trace callers when the thread depends on them), **prove the call blocks**, then attribute and grade. Report only candidates that pass these checks; list the dismissed ones separately with a one-line reason.
- Evaluate off-main-thread mutations of attached Views not merely as crash risks (`CalledFromWrongThreadException`), but as **Sync Barrier Leak ANR** risks with their own proof (off-main execution plus an attached View).

## 2. Path B: Trace-driven diagnosis and remediation

When analyzing ANR traces or stack dumps:

- Diagnose systematically using [references/trace_analysis_guide.md](references/trace_analysis_guide.md) and format the report with [references/anr_trace_report_template.md](references/anr_trace_report_template.md).