# Developer Everything for reading, extending, and trusting the engine. - **Symbol reference** — the exhaustive, per-symbol Doxygen rendition of the headers: /api. - **Architecture** — {doc}`How REAL works `, then the full guided tour on /api/design.html (Thompson NFA, Pike VM, prefilter, every fast path). - **Coverage** — the coverage report: LLVM source-based instrumentation, how to read it, and the full per-line report. - **Performance** — the capability picture and how to read a number: {doc}`Performance <../performance/index>`. Tables and the measurement doctrine stay on GitHub: [BENCHMARKS.md](https://github.com/RECHE23/real-regex/blob/main/docs/BENCHMARKS.md), [MEASUREMENT.md](https://github.com/RECHE23/real-regex/blob/main/docs/MEASUREMENT.md). - **Testing** — the test taxonomy and its gates: [TESTS.md](https://github.com/RECHE23/real-regex/blob/main/docs/TESTS.md). - **Development workflow** — the build/test harness (SciForge) and the make-target taxonomy: {doc}`Development workflow `. ```{toctree} :hidden: :maxdepth: 1 how-it-works workflow ```