Individual skill
compiler-frontend
Use when building a lexer, Pratt or recursive-descent parser, AST, symbol table, type checker, or LLVM IR emitter for a language or DSL. Not for optimizing IR: use llvm-passes.
.devin/skills/compiler-frontend/SKILL.md
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# Compiler frontend
## Contract
| Field | Bound contract |
|---|---|
| Trigger | A user implements a language or DSL, adds expression parsing to an interpreter or config format, designs AST nodes in C or Rust, needs scoped symbols, basic type checking, error recovery, or wants a typed AST lowered to LLVM IR. |
| Authority | Reversible local: writes only the frontend source files the user names inside the project; rollback is version control. No remote mutation. |
| Side effect | Frontend source files are created or edited; a test input is lexed, parsed, checked, and, when requested, emitted as IR and verified. |
| Done | Each requested stage compiles, runs on the supplied test inputs, and the verification named for that stage passes: token stream matches, precedence tests pass, undefined and mismatched types are reported, generated IR passes the LLVM verifier. |
## Inputs
1. Language description (required): the token set, the grammar or a set of example programs, and the operators with their precedence and associativity.