Individual skill

fuzzing-obstacles

Use when asked to identify and bypass checksums, nondeterminism, or validation barriers that block fuzzing coverage. Not for dictionary creation: use fuzzing-dictionary. Local writes only.

.devin/skills/fuzzing-obstacles/SKILL.md

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Sep 28, 2026
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# Fuzzing obstacles

## Contract

| Field | Bound contract |
|---|---|
| Trigger | User needs to identify and safely bypass checksums, nondeterminism, or validation barriers that block fuzzing coverage. |
| Authority | Reversible local: writes only the System Under Test source behind an explicit fuzzing build flag so production behavior is unchanged; rollback is deleting the conditional block or the fuzz build configuration. No remote mutation. Production code path is never altered. |
| Side effect | Fuzz-only target behavior behind explicit build controls. No production binary, credential, remote, or published artifact is touched. |
| Done | The specific obstacle is bypassed only in fuzz builds, coverage improves over the unpatched baseline, and false-positive risk is assessed. |

## Not for

- Dictionary creation for fixed-token gates: use fuzzing-dictionary.