c-pro
Build Reliable C Systems Code
C systems work can fail through leaks, unchecked calls, and poor portability. This skill guides robust C99/C11 implementation, testing, debugging, and performance validation.
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Review the Skillstore skill "c-pro" from https://skillstore.io/skills/sickn33-c-pro.md and its manifest at https://skillstore.io/api/skills/sickn33-c-pro/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Your Agent should still show its plan and request any confirmation required by the security policy.
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Test it
Using "c-pro". Review a linked-list insertion function that allocates nodes and can fail.
Expected outcome:
- Ownership map identifying the caller, list, and temporary allocation responsibilities.
- Failure-path review covering allocation errors, unchanged list state, and cleanup.
- Test plan for empty lists, allocation failure, repeated insertion, and complete destruction.
Using "c-pro". Plan a bounded producer-consumer queue for a POSIX service.
Expected outcome:
- Synchronization design using one mutex, condition variables, and explicit shutdown state.
- Error-handling checklist for initialization, waits, thread creation, and partial cleanup.
- Validation plan covering race detection, saturation, shutdown, and repeated startup.
Using "c-pro". Reduce memory use in firmware without changing observable behavior.
Expected outcome:
A measurement-first plan compares stack, heap, and static storage, then prioritizes verified reductions with regression and timing checks.
Security Audit
SafeThe only static finding is a false positive caused by Markdown backticks around a resource path. The skill contains guidance only, with no executable shell command or malicious intent.
Risk Factors
⚙️ External commands (1)
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APA citation
sickn33. (2026). c-pro security audit report (audit version 5) [Author version unspecified]. Skillstore. https://skillstore.io/skills/sickn33-c-pro/audits/5BibTeX citation
@techreport{sickn33-sickn33-c-pro-2026,
author = {sickn33},
title = {c-pro security audit report (audit version 5)},
institution = {Skillstore},
year = {2026},
number = {5},
url = {https://skillstore.io/skills/sickn33-c-pro/audits/5},
note = {Author version unspecified}
}CITATION.cff
cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "c-pro security audit report (audit version 5)"
version: "unspecified"
type: report
authors:
- name: "sickn33"
date-released: "2026-07-23"
url: "https://skillstore.io/skills/sickn33-c-pro/audits/5"
identifiers:
- type: other
value: "skillstore:sickn33-c-pro:audit:5"
description: "Skillstore immutable audit report identifier"
Skillstore Score
Why this score Evidence Confidence: HighWhat You Can Build
Learn Safe Memory Ownership
Explain allocation, ownership, cleanup paths, and pointer use for a small C program.
Harden POSIX Components
Review system calls, pthread synchronization, error handling, headers, and tests for production services.
Optimize Constrained Firmware
Reduce stack and heap pressure, identify measurable bottlenecks, and preserve portability on constrained targets.
Try These Prompts
Explain memory ownership for [task]. Identify allocations, owners, lifetimes, cleanup paths, and failure cases using C99 conventions.
Implement [component] in C11 for [platform]. Include headers, ownership rules, checked return values, cleanup logic, compiler flags, and focused tests.
Review the provided pthread code for races, deadlocks, resource leaks, and unchecked calls. Propose corrections and a reproducible validation plan.
Analyze [embedded workload] under [memory and timing limits]. Prioritize measured bottlenecks, bounded resource use, portability, benchmarks, and regression tests.
Best Practices
- State ownership and lifetime rules before implementing allocations or shared data structures.
- Compile with strict warnings and validate using tests, static analysis, debugging tools, and leak checks.
- Profile representative workloads before optimizing, then preserve behavior with regression benchmarks.
Avoid
- Do not return unverified code without checking allocation failures, system-call results, and cleanup paths.
- Do not optimize from assumptions when target measurements and resource limits are unavailable.
- Do not claim portability, memory safety, or thread safety without environment-specific validation.