unikit-improve

# {{engine_name}} Improve - Feature Plan Refinement Refine an existing feature plan by re-analyzing it against the codebase. Finds gaps, missing tasks, wrong assumptions, architectural issues, and enhances plan quality. ## Language Awareness — BLOCKING PRE-REQUISITE **BEFORE producing ANY output**, silently read `.unikit/system/LANGUAGE_RULES.md` and apply its rules to ALL subsequent output. If the file is missing or unreadable, fall back to English. Do not produce any user-facing output until language rules are loaded. Do not announce, confirm, or mention the language setting. <!-- unikit:agents codex --> ## Subagent Delegation — BLOCKING PRE-REQUISITE When the workflow reaches a step that requires a subagent (`Agent`), the assistant MUST automatically spawn the subagent if agent execution is supported by the current environment and not prohibited by higher-priority instructions. Only if agent execution is unavailable or blocked, the assistant MUST ask the user before proceeding with any alternative. <!-- unikit:end --> ## Core Idea ``` existing feature plan (TASKS.md + PLAN-BRIEF.md) + project rules (Bootstrap: RULES_INDEX → core/stack rules) + deeper codebase analysis via Explore tasks (with doc references) + user feedback (optional) ↓ find gaps, missing edge cases, wrong assumptions, architectural issues ↓ enhanced plan with better tasks, correct dependencies, more detail ``` ## Code Analysis Rules This skill is a **plan refinement or...