behavior-preservation-checker

Compare runtime behavior between original and migrated repositories to detect behavioral differences, regressions, and semantic changes. Use when validating code migrations, refactorings, language ports, framework upgrades, or any transformation that should preserve behavior. Automatically compares test results, execution traces, API responses, and observable outputs between two repository versions. Provides actionable guidance for fixing deviations and ensuring behavioral equivalence.

2.62x

Quality

73%

Does it follow best practices?

Impact

97%

2.62x

Average score across 3 eval scenarios

Securityby

Passed

No findings from the security scan

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tessl review fix ./skills/behavior-preservation-checker/SKILL.md

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Run	Type	Date	Status
baseline vs usage-spec With / without context 7 months ago Completed	With / without context	7 months ago	Completed

Eval run

019cc47e-4611-727c-b2c3-aac109b8984a

Run 7 months ago

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Repository: ArabelaTso/Skills-4-SE
Path: skills/behavior-preservation-checker/SKILL.md
Commit: 4f38503

Evaluated: 7 months ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Validate a Refactored Statistics Library Validate a Ported String Processing Library Validate a Migrated Sorting and Search Library

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