Adds validation at every layer data flows through so a whole class of downstream bugs becomes structurally impossible.
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Source: https://github.com/obra/superpowers-skills/tree/main/skills/debugging/defense-in-depth
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Replaces flaky arbitrary sleep/timeout calls in async tests with polling for the actual condition.
Applies systematic root-cause debugging instead of guess-and-check when a test, build, or behavior breaks.
Captures and analyzes Windows usermode/kernel debug output from the command line via Sysinternals DebugView.
Runs mutation testing to measure whether a test suite actually catches introduced bugs, not just achieves coverage.
Writes property-based tests (Hypothesis-style) that check invariants across generated inputs instead of fixed examples.
Walks a deep failure backward through the call stack to find where bad data or logic actually originated.