References — fw-06 Template and JSX Compilers

Primary sources first. Read the real implementation after you have written yours, never before.

Parsing and ASTs

AST Explorer — paste code, see the tree, for every parser mentioned here. The single most useful tool in this module.
ESTree specification — the AST shape JavaScript tooling agrees on
Acorn — small, readable JS parser
Babel plugin handbook — the best introduction to visitors and transforms anywhere

Real compilers to read

@vue/compiler-core — parse → transform → codegen, cleanly separated. transforms/ is where the optimisations live (static hoisting, patch flags).
Svelte compiler — the most aggressive position: compile the framework away
Babel JSX transform — including the automatic runtime
React Compiler — memoisation inferred rather than written; the newest entry in this design space

Source maps

Source Map specification — now on a standards track
@jridgewell/gen-mapping and trace-mapping — the modern implementations
Source Map Visualization — Evan Wallace's tool; invaluable when your mappings are wrong

fw-07 — Bundler — where the compiler output gets linked together
fw-05 — Vue renderer — compiler-informed fast paths
fe-39 — Build tooling (planned) — the architectural comparison of bundlers

When a claim here proves stale, record it in PROGRESS.md section 7.