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project-sizing-guide

Software project effort estimation assistant. Outputs three-point estimates (optimistic/most-likely/pessimistic values with confidence intervals), T-shirt sizes, or Function Point Analysis (FPA) counts. Triggered when users ask 'how long will this feature take,' need to assess project workload, perform PERT estimation, T-shirt sizing, FPA, sprint planning, or quote-based effort breakdowns.

skills/project-sizing-guide/SKILL.md

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# Project Sizing Guide — Software Project Effort Estimation

Helps teams produce scientifically grounded effort estimates for software projects, based on three major methodologies: Three-Point Estimation (PERT), T-shirt Sizing, and Function Point Analysis (FPA). Outputs optimistic, most-likely, and pessimistic values along with risk intervals.

## Quick Start

1. **User provides a requirements description** → Agent identifies functional modules and breaks them into a Work Breakdown Structure (WBS)
2. **Select an estimation method** → Choose the best-fit approach based on project stage and available information
3. **Estimate each item** → Assign O/M/P (Optimistic / Most Likely / Pessimistic) values to every work package
4. **Aggregate and report** → Generate an estimation report with risk analysis and confidence intervals

A calculation helper is available:
```bash
python3 scripts/estimate_calculator.py --method pert --tasks '[{"name":"User Login","O":2,"M":3,"P":8}]'