C++ AI Tools Best Practices
07 Feb 2026
[
ai
c++
]
1. Properly Set Up Your Environment
- Warnings
- Static Analysis
- Dynamic Analysis
- Exhaustive Tests
- Follow well accepted practices
-Wall -Wextra -Wconversion -Wshadow. /W4- Clang-tidy integration
- Undefined behavior and address sanitizers
- Default warnings as errors
--coverage and single step to run test/coverage results- Error if tools cannot be found during the configuration
- Use
make commands and document them in ReadMe
2. Don’t fully trust the bot (don’t vibe)
- Every PR Must Be Reviewed Like It’s From Someone on the Internet
3. More than autocomplete, less than vibing
4. Be Aware Of Context Limitations
5. Think Of The Bot As Your Intern With A Short Attention Span
- Has read the entire Internet
- Can work an order of magnitude faster than you can
- Will get distracted and start working on tangentally related things
- Will get stuck in one way of doing things (not necessarily the way you want)
6. Have Startup Instructions And Directives Written Out
- Each time your AI bot restarts, it’s like having to get a brand new developer up to speed on the project
- Provide a set of instructionsin a well defined place that explain:
- How to compile
- Tools in use
- Coding standards that cannot be enforced with tooling
- Keep this file succint: You don’t want to overload the context of the LLM (just like you don’t want to with a human!)
7. Avoid Negative Directives
- Like with humans
- Avoid saying “never do X” or “don’t forget to do Y”
- Instead say “always do W” and “remember to do Z”
8. Avoid vague or broad directives
- No “Use modern C++” - “write constexpr enabled C++20 that has constexpr testing for all features”
9. Always Remove Stale Code and Stale Files
- Don’t let it comment out code or put in negative comments
10. Achieve close to 100% code coverage before you do any refactoring or adding
- You are allowed to have it create the test framework
- Establish at least some tests that have the look and feel you want (the bot fill follow your patterns)
- Tell the bot to use coverage to guide the new tests - aim for 100% test coverage
- The bot is likely to write tests that match current behavior
- Have it generate a list of mismatches between expected behavior and current behavior
11. Work From A Task List
- Probably most simple if this is a local markdown file
- It can be driven by your issue tracker
- Your first task need to be those that were marked as mismatches during creation of the tests
- The bot itself can help you create the task list
Work With The Bot
- Your first task should be to go through failing or questionable tests
- Pick a task to complete
- Have it ask you clarifying questions
- Have it perform the task
- Have it create (or update) the tests
- Verify it correctly ran all tests, all analysis, all code formatting
- Verify code coverage did not decrease
- Verify it did not disable any tools or tests
- Have it create a commit
12. Verify Its Work
- Remember: They will work around your rules
- Remember: They will forget to verify things you care about
Saves Time
- Tests uncovered corner cases previously hadn’t considered
- Dozens of bugs were discovered and fixed much faster
13. Be Willing To Move On If It’s Not Able To Help With A Certain Task
Reference