Cpp Templates

Helps you read C++ template errors from the bottom up, migrate from SFINAE to concepts, and figure out why your compile times are slow. It covers requires-clauses, concept constraints, and profiling instantiation depth with Templight or ClangBuildAnalyzer. The skill is practical about the SFINAE versus concepts tradeoff: concepts give cleaner errors and faster compiles but need C++20. Good for when you're staring at a 300-line error message or watching your build crawl because of recursive template instantiations. Also includes flags like -ftemplate-backtrace-limit to cut the noise.

skills.sh installs: 574
GitHub stars: 279
last updated: Aug 21, 2026

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Install

$ npx -y skills add mohitmishra786/low-level-dev-skills --skill cpp-templates --agent claude-code

Installs into .claude/skills of the current project.

Files

C++ Templates

Purpose

Guide agents through reading and fixing template error messages, using concepts as cleaner constraints, understanding SFINAE vs concepts trade-offs, and profiling template instantiation depth and compile times with Templight.

Triggers

"How do I read this massive C++ template error?"
"How do I use concepts to constrain a template?"
"What's the difference between SFINAE and concepts?"
"My templates make compilation very slow"
"How do I write a requires-clause?"
"How do I profile template instantiation times?"

Workflow

1. Reading template error messages

Template errors print full instantiation chains. Strategy: read from the bottom up.

prog.cpp:25:5: error: no matching function for call to 'sort'
  std::sort(v.begin(), v.end());
  ^~~~~~~~~
/usr/include/c++/13/bits/stl_algo.h:4869:5: note: candidate:
    template<class _RAIter>
    void std::sort(_RAIter, _RAIter)
note: template argument deduction/substitution failed:
prog.cpp:25:5: note: 'MyType' is not a valid type for this template
                             ^~~~~~~~

SKILL.md on GitHub