Individual skill

rustc-basics

Use when selecting RUSTFLAGS, configuring Cargo profiles, tuning release builds, reading assembly or MIR output, understanding monomorphization, or diagnosing compilation errors.

.devin/skills/rustc-basics/SKILL.md

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# rustc basics

rustc is driven through Cargo profiles and `-C` codegen flags. The right answer is a profile entry or a flag, verified against the installed toolchain.

## Contract

| Field | Bound contract |
|---|---|
| Trigger | Choosing RUSTFLAGS or Cargo profile settings, inspecting compiler output (assembly, MIR, LLVM IR), reducing binary size, or triaging a compilation error. |
| Authority | Read-only. Chat output only. No remote mutation. |
| Side effect | Emits a configuration recommendation or explanation to chat. |
| Done | The report names the profile settings, flag set, inspection command, or error fix, each verified against the installed rustc. |

## Inputs