QEMU TCG Frontend Instruction

Use this domain skill for guest ISA decode/translation work in target/<arch>/: decodetree patterns, trans_* functions, feature gates, helpers, PC updates, exceptions, and tests.

Flow dependencies

1. Start with qemu-flow-plan.
2. Put decode notes, generated decoder inspection, TCG logs, test outputs, and scratch files under build/agent/<task-slug>/.
3. Use qemu-rlcr-loop for iterative work.
4. Use qemu-build for target builds.
5. Use qemu-debug for TCG logs and one-insn-per-tb debugging.
6. Use qemu-model-verification for evidence reporting.

Hard policy boundary

Do not produce source code intended for QEMU upstream submission. Do not add DCO or review trailers.

Frontend contract