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c-hardening-baseline

Use when C code is written or audited and needs a pure-C baseline: standard, undefined behavior, integer and buffer safety, sanitizers, fuzzing, build flags. Not for C++: use modern-cpp-practices.

.devin/skills/c-hardening-baseline/SKILL.md

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# C hardening baseline

This skill is a pure-C policy. It never prescribes a C++ idiom (RAII, destructors, smart pointers, lock guards, containers) as C practice. C++ code goes to `modern-cpp-practices`.

## Contract

| Field | Bound contract |
|---|---|
| Trigger | C code is being written, audited, or hardened and the project needs one baseline for the C standard, undefined behavior, integer and buffer safety, the sanitizer and fuzzing matrix, and build and CI hardening flags. |
| Authority | Read-only. Writes nothing. Chat output only. No remote mutation. |
| Side effect | Emits a guidance report to chat. No source or build file is modified. |
| Done | The report names the C standard with the compiler that supports it, the undefined-behavior catalog with the sanitizer that traps each entry, the integer and buffer rules with their checked-arithmetic form, the hardening flag set the identified compiler accepts, the sanitizer and fuzzing jobs for CI, and the findings the audit checklist produced. |

## Inputs