{"slug":"jeffallan-cpp-pro","name":"cpp-pro","description":"Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or when addressing performance bottlenecks, concurrency issues, and build system configuration with CMake.","long_description":"---\nname: cpp-pro\ndescription: Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or when addressing performance bottlenecks, concurrency issues, and build system configuration with CMake.\nlicense: MIT\nmetadata:\n  author: https://github.com/Jeffallan\n  version: \"1.1.0\"\n  domain: language\n  triggers: C++, C++20, C++23, modern C++, template metaprogramming, systems programming, performance optimization, SIMD, memory management, CMake\n  role: specialist\n  scope: implementation\n  output-format: code\n  related-skills: rust-engineer, embedded-systems\n---\n\n# C++ Pro\n\nSenior C++ developer with deep expertise in modern C++20/23, systems programming, high-performance computing, and zero-overhead abstractions.\n\n## Core Workflow\n\n1. **Analyze architecture** — Review build system, compiler flags, performance requirements\n2. **Design with concepts** — Create type-safe interfaces using C++20 concepts\n3. **Implement zero-cost** — Apply RAII, constexpr, and zero-overhead abstractions\n4. **Verify quality** — Run sanitizers and static analysis; if AddressSanitizer or UndefinedBehaviorSanitizer report issues, fix all memory and UB errors before proceeding\n5. **Benchmark** — Profile with real workloads; if performance targets are not met, apply targeted optimizations (SIMD, cache layout, move semantics) and re-measure\n\n## Reference Guide\n\nLoad detailed guidance based on context:\n\n| Topic | Reference | Load When |\n|-------|-----------|-----------|\n| Modern C++ Features | `references/modern-cpp.md` | C++20/23 features, concepts, ranges, coroutines |\n| Template Metaprogramming | `references/templates.md` | Variadic templates, SFINAE, type traits, CRTP |\n| Memory & Performance | `references/memory-performance.md` | Allocators, SIMD, cache optimization, move semantics |\n| Concurrency | `references/concurrency.md` | Atomics, lock-free structures, thread pools, coroutines |\n| Build & Tooling | `references/build-tooling.md` | CMake, sanitizers, static analysis, testing |\n\n## Constraints\n\n### MUST DO\n- Follow C++ Core Guidelines\n- Use concepts for template constraints\n- Apply RAII universally\n- Use `auto` with type deduction\n- Prefer `std::unique_ptr` and `std::shared_ptr`\n- Enable all compiler warnings (-Wall -Wextra -Wpedantic)\n- Run AddressSanitizer and UndefinedBehaviorSanitizer\n- Write const-correct code\n\n### MUST NOT DO\n- Use raw `new`/`delete` (prefer smart pointers)\n- Ignore compiler warnings\n- Use C-style casts (use static_cast, etc.)\n- Mix exception and error code patterns inconsistently\n- Write non-const-correct code\n- Use `using namespace std` in headers\n- Ignore undefined behavior\n- Skip move semantics for expensive types\n\n## Key Patterns\n\n### Concept Definition (C++20)\n```cpp\n// Define a reusable, self-documenting constraint\ntemplate<typename T>\nconcept Numeric = std::integral<T> || std::floating_point<T>;\n\ntemplate<Numeric T>\nT clamp(T value, T lo, T hi) {\n    return std::clamp(value, lo, hi);\n}\n```\n\n### RAII Resource Wrapper\n```cpp\n// Wraps a raw handle; no manual cleanup needed at call sites\nclass FileHandle {\npublic:\n    explicit FileHandle(const char* path)\n        : handle_(std::fopen(path, \"r\")) {\n        if (!handle_) throw std::runtime_error(\"Cannot open file\");\n    }\n    ~FileHandle() { if (handle_) std::fclose(handle_); }\n\n    // Non-copyable, movable\n    FileHandle(const FileHandle&) = delete;\n    FileHandle& operator=(const FileHandle&) = delete;\n    FileHandle(FileHandle&& other) noexcept\n        : handle_(std::exchange(other.handle_, nullptr)) {}\n\n    std::FILE* get() const noexcept { return handle_; }\nprivate:\n    std::FILE* handle_;\n};\n```\n\n### Smart Pointer Ownership\n```cpp\n// Prefer make_unique / make_shared; avoid raw new/delete\nauto buffer = std::make_unique<std::array<std::byte, 4096>>();\n\n// Shared ownership only when genuinely needed\nauto config = std::make_shared<Config>(parseArgs(argc, argv));\n```\n\n## Output Templates\n\nWhen implementing C++ features, provide:\n1. Header file with interfaces and templates\n2. Implementation file (when needed)\n3. CMakeLists.txt updates (if applicable)\n4. Test file demonstrating usage\n5. Brief explanation of design decisions and performance characteristics\n\n[Documentation](https://jeffallan.github.io/claude-skills/skills/language/cpp-pro/)\n","tagline":"Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or","category":"design-creative","tags":["agent-skill"],"author":"Jeffallan","verified":false,"attribution":{"status":"registry_indexed","statusLabel":"Registry indexed","shortLabel":"REGISTRY INDEXED","sourceLabel":"github candidate review","sourceDetail":"Jeffallan/claude-skills","creatorName":"Jeffallan","creatorUrl":"https://github.com/Jeffallan","sourceUrl":"https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro","indexedBy":"OpenAgentSkill community index","claimUrl":"https://www.openagentskill.com/skills/jeffallan-cpp-pro#claim-this-skill","claimCta":"Claim this skill","trustNote":"This listing was indexed from public sources and is not marked official until a maintainer claim is approved.","publicNote":"Attribution links to the public repository or creator profile. 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require human review before any live investment decision.","Quality score needs review"]},"outcomeEvidence":{"total":0,"successes":0,"failures":0,"notRelevant":0,"successRate":null,"installAttempts":0,"riskBlocked":0,"setupRequired":0,"installSuccessRate":null,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"recentSuccessRate":null,"recentFailureRate":null,"uniqueAgents":0,"agentProvenScore":0,"agentProvenLabel":"Needs first agent run","lastOutcomeAt":null,"label":"No agent outcome data yet"},"autoInstall":{"allowed":false,"sandboxRequired":true,"policy":"human_review_before_install","reason":"Human review or sandbox validation is required before automatic installation."},"bestFor":["design-creative","agent-skill"],"doNotUseFor":["Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace","Autonomous investment, trading, tax, or suitability decisions without a qualified human review"],"knownRisks":["SKILL.md does not include an explicit 'Limitations' or 'When Not to Use' section, so safe operating boundaries are only implied by the constraints.","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. 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require human review before any live investment decision"]},{"id":"readme_skillmd_completeness","label":"README/SKILL.md completeness","status":"pass","score":86,"required_for_auto_install":false,"detail":"Metadata includes enough usage and workflow context","evidence":["Strong README/SKILL.md context"]},{"id":"license_clarity","label":"License clarity","status":"pass","score":86,"required_for_auto_install":true,"detail":"MIT","evidence":["MIT"]},{"id":"recent_maintenance","label":"Recent maintenance","status":"pass","score":100,"required_for_auto_install":false,"detail":"29d since push","evidence":["29d since push"]},{"id":"permission_surface","label":"Permission surface","status":"pass","score":86,"required_for_auto_install":true,"detail":"filesystem or document access","evidence":["Network access: medium","Filesystem access: medium"]},{"id":"alternatives","label":"Alternatives available","status":"info","score":55,"required_for_auto_install":false,"detail":"No close alternatives were found in the current shortlist.","evidence":[]}],"endpoints":{"web":"https://www.openagentskill.com/skills/jeffallan-cpp-pro/evals","api":"/api/agent/evals?slug=jeffallan-cpp-pro","text":"/api/agent/evals?slug=jeffallan-cpp-pro&format=text"}},"agent_readable_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"jeffallan-cpp-pro","name":"cpp-pro","description":"Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. 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Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"cpp-pro\" as a Claude Code skill from https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or when addressing performance bottlenecks, concurrency issues, and build system configuration with CMake. 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Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":87,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Financial research output is not financial advice; require human review before any live investment decision","SKILL.md does not include an explicit 'Limitations' or 'When Not to Use' section, so safe operating boundaries are only implied by the constraints.","Some reference file excerpts appear truncated or incomplete, which could reduce usefulness if the actual files are not fully populated.","No explicit guidance on how to handle unsafe or malicious user C++ code requests beyond general good-practice constraints.","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"]},"safety_gate":{"tier":"reviewed","label":"Reviewed with permission notes","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Require human approval before installing into a real workspace."},"quality":{"score":88,"label":"Excellent"},"supply":{"track":"Coding and developer agents","scenario":"Coding agents","maintenance":"29d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","production agents without a repository review","SKILL.md does not include an explicit 'Limitations' or 'When Not to Use' section, so safe operating boundaries are only implied by the constraints.","Financial research output is not financial advice; require human review before any live investment decision","Some reference file excerpts appear truncated or incomplete, which could reduce usefulness if the actual files are not fully populated.","No explicit guidance on how to handle unsafe or malicious user C++ code requests beyond general good-practice constraints.","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"],"agent_contract":{"task_input":"Use cpp-pro in an agent workflow","recommended_action":"Require human approval before installing into a real workspace.","install_policy":"review","minimum_review_before_use":["Trust: 79/100 Strong shortlist","Audit: 87/100 Needs review","Safety: 71/100 Review before install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"jeffallan-cpp-pro (cpp-pro)","install_command":"npx skills add Jeffallan/claude-skills --skill cpp-pro","risk_summary":"Needs review; Reviewed with permission notes; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"jeffallan-cpp-pro","task":"Use cpp-pro in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/jeffallan-cpp-pro","api":"https://www.openagentskill.com/api/agent/skills/jeffallan-cpp-pro","audit":"https://www.openagentskill.com/skills/jeffallan-cpp-pro/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=jeffallan-cpp-pro&task=Use%20cpp-pro%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20cpp-pro%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20cpp-pro%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/jeffallan-cpp-pro/install","manifest":"https://www.openagentskill.com/api/registry/manifest/jeffallan-cpp-pro"}},"supply_profile":{"track":{"slug":"coding","label":"Coding and developer agents","shortLabel":"Coding","description":"Code review, repo analysis, testing, CI, GitHub, DevOps, and developer workflow skills."},"scenario":{"label":"Coding agents","description":"I need a coding agent that can understand a repository, edit code, and review pull requests.","useCases":[{"slug":"coding-agents","title":"Coding agents"},{"slug":"github-automation","title":"GitHub automation"},{"slug":"testing-qa","title":"Testing and QA"}]},"applicableAgents":["Claude Code","CLI","Codex","Cursor"],"install":{"ready":true,"command":"npx skills add Jeffallan/claude-skills --skill cpp-pro","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":11280,"starsLabel":"11K","forks":1079,"license":"MIT","qualityScore":88,"trustScore":79,"auditScore":87},"maintenance":{"status":"fresh","label":"29d since push","daysSincePush":29,"lastPushedAt":"2026-08-07T20:19:18+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["Financial research output is not financial advice; require human review before any live investment decision","SKILL.md does not include an explicit 'Limitations' or 'When Not to Use' section, so safe operating boundaries are only implied by the constraints.","Some reference file excerpts appear truncated or incomplete, which could reduce usefulness if the actual files are not fully populated.","No explicit guidance on how to handle unsafe or malicious user C++ code requests beyond general good-practice constraints.","Financial research output is not financial advice; require human review before any live investment decision."]},"coverageTags":["Coding","Coding agents","design-creative","agent-skill"]},"audit":{"audit_score":87,"risk_level":"needs_review","risk_label":"Needs review","quality_score":88,"trust_score":79,"maintenance_score":100,"security_score":83,"install_score":92,"warnings":["Financial research output is not financial advice; require human review before any live investment decision","SKILL.md does not include an explicit 'Limitations' or 'When Not to Use' section, so safe operating boundaries are only implied by the constraints.","Some reference file excerpts appear truncated or incomplete, which could reduce usefulness if the actual files are not fully populated.","No explicit guidance on how to handle unsafe or malicious user C++ code requests beyond general good-practice constraints.","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"]},"quality_signals":{"model":"v2","star_score":28.37,"usage_score":0,"review_score":5.25,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code"],"use_cases":[{"slug":"coding-agents","title":"Coding agents","url":"https://www.openagentskill.com/use-cases/coding-agents"},{"slug":"github-automation","title":"GitHub automation","url":"https://www.openagentskill.com/use-cases/github-automation"},{"slug":"testing-qa","title":"Testing and QA","url":"https://www.openagentskill.com/use-cases/testing-qa"},{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"}],"stacks":[{"slug":"coding-review-agent","title":"Coding review agent","url":"https://www.openagentskill.com/collections/coding-review-agent"},{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"},{"slug":"research-report-agent","title":"Research report agent","url":"https://www.openagentskill.com/collections/research-report-agent"}],"install":"npx skills add Jeffallan/claude-skills --skill cpp-pro","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add jeffallan-cpp-pro","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"cpp-pro\" agent skill from https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or when addressing performance bottlenecks, concurrency issues, and build system configuration with CMake. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"jeffallan-cpp-pro\",\"task\":\"Install cpp-pro\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"cpp-pro\" as a Claude Code skill from https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or when addressing performance bottlenecks, concurrency issues, and build system configuration with CMake. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"jeffallan-cpp-pro\",\"task\":\"Install cpp-pro\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"cpp-pro\" from https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Writes, optimizes, and debugs C++ applications using modern C++20/23 features, template metaprogramming, and high-performance systems techniques. Use when building or refactoring C++ code requiring concepts, ranges, coroutines, SIMD optimization, or careful memory management — or when addressing performance bottlenecks, concurrency issues, and build system configuration with CMake. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"jeffallan-cpp-pro\",\"task\":\"Install cpp-pro\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro","github_repo":"Jeffallan/claude-skills","version":"1.0.0","license":"MIT","urls":{"web":"https://www.openagentskill.com/skills/jeffallan-cpp-pro","repository":"https://github.com/Jeffallan/claude-skills/tree/main/skills/cpp-pro","api":"/api/agent/skills/jeffallan-cpp-pro","install_api":"/api/skills/jeffallan-cpp-pro/install"},"meta":{"created_at":"2026-09-02T00:44:07.088155+00:00","updated_at":"2026-09-02T00:44:07.230575+00:00","agent_friendly":true}}