estimate

基于复杂度、依赖、历史产能与风险因素给出结构化的任务估算与置信度。

把任务拆成可量化的工时与人力估算，综合考虑复杂度、外部依赖、团队历史产能和风险因素，同时给出置信度区间以表明估算可靠性。会先读取项目上下文（例如 AGENTS.md 和相关设计文档），如果任务描述太模糊会先回问以避免误估。输出结构化的时间/人力块、风险假设和优先级建议，适合冲刺规划、排期和资源分配时使用。

## Phase 1: Understand the Task

Read the task description from the argument. If the description is too vague to estimate meaningfully, ask for clarification before proceeding.

Read AGENTS.md for project context: tech stack, coding standards, architectural patterns, and any estimation guidelines.

Read relevant design documents from `design/gdd/` if the task relates to a documented feature or system.

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## Phase 2: Scan Affected Code

Identify files and modules that would need to change:

- Assess complexity (size, dependency count, cyclomatic complexity)
- Identify integration points with other systems
- Check for existing test coverage in the affected areas
- Read past sprint data from