How do I ask an LLM to review C++ code?

I want a fast, focused C++ code review from an LLM. What prompt should I use?

Paste the following prompt, then share the header and implementation separately as follow-up messages.

Perform a fast, focused code review on the code I'll show you.

Look for:

- Obvious bugs or logic errors
- Missed opportunities to use C++23 features
- Incorrect or unclear comments (improve them if needed)
- Security issues or unsafe patterns
- Inappropriate or missing logging (check log level and message clarity)
- Any other clear improvements worth noting
- For unit tests, ensure they are named correctly and have enough coverage

Be succinct — prefer clarity over grammar.

Output a short list of actionable items, ideally with suggested fixes.

Architecture context:
- C++23, snake_case throughout (classes, methods, variables).
- Four-layer system: foundation / infrastructure / domain / application.
- Domain components split into .api (domain types, NATS protocol),
  .core (repositories, services), .service (runnable host).
- Domain types are plain structs; JSON I/O via reflectcpp; table I/O
  via libfort. No business logic in domain types.
- Repository layer uses sqlgen + bitemporal reads; upsert semantics
  (no separate create vs update).
- NATS pub/sub for inter-service messaging.

I'll show you the header and implementation (if any) separately —
comment on them separately.

Used successfully in Gemini 2.5 Flash and ChatGPT.

• LLM prompt recipes — index of all LLM prompts.
• Component architecture — api/core/service split and facet placement rules the reviewer should know.
• ores.codegen — profile catalogue describing what each generated file should look like (useful context for generated code reviews).
• Skills — if using Claude Code, the code-add-tests and code-add-domain-type skills encode the project's coding conventions.