Issue Implement

Implement a claimed single issue package or PRD package. The configured workflow backend is the implementation source of truth; chat history is context only.

Implementation happens in an isolated worktree and finishes with verification, code review, a scoped commit, and implementation evidence.

Backend Contract

Before implementation work, read .and/config.yml, then use ai-native-backend-contract.

Use the configured backend reference for reading the claimed delivery unit and recording implementation evidence. If setup is missing, unsupported, or the backend contract is unavailable, stop and route to setup-ai-native-development or ask the user to install the missing skill.

Do not infer backend ownership, receipt, child, relationship, or implementation artifact representation inside this skill.

External Implementation Skills

tdd and code-review are required implementation skills. Verify they are available before implementation work begins.

If one is missing, stop with the exact missing skill and route to setup-ai-native-development or the documented install command. Do not simulate missing skills.