Individual skill

interpreters

Use when designing bytecode dispatch loops, choosing stack or register VM shapes, adding inline caches, or building a first JIT with mmap. Not for a language toolchain: use compiler-frontend.

.devin/skills/interpreters/SKILL.md

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# Interpreters and bytecode VMs

An interpreter's speed is decided by its dispatch loop and its value representation. Pick those two first; everything else is negotiable.

## Contract

| Field | Bound contract |
|---|---|
| Trigger | The task implements or speeds up a bytecode interpreter, chooses dispatch strategy, designs value tagging, adds inline caches, or writes a small JIT. |
| Authority | Reversible local: writes only the interpreter source, build files, and scratch benchmark files the user names; rollback is version control. No remote mutation. |
| Side effect | Local writes to source and build outputs. JIT pages are created with `mmap` and `mprotect` inside the program under development. |
| Done | The interpreter runs the benchmark workload end to end, and a measured comparison backs every performance claim made about it. |

## Inputs