Track and analyze historical cost data using CWICR. Compare actual vs estimated costs, build project cost database, and improve future estimates.
SkillScore83Maintained
Automatic
◆Project Management pack
Last verified 8/27/2026
What it changes
Passed 18 of 22 test cases with the skill, and 8 of 22 without it.
Without skill35%
With skill83%
Checks it passed that the model alone missed
Sets the initial project status to estimated.
Returns zero variance percentage when estimated cost is zero.
Keys saved line item entries under the records dictionary key.
and 13 more in the full report
11 fixed8 passed either way4 still failing0 broke
Pass-rate lift
+48 pp
Tokens
+155%
Agent turns
0%
Response time
-24%
Model gemini-3.6-flashMeasured 8/27/2026v219 of 23 cases passed with skill · 22 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 11
Prompt
When historical cost accuracy metrics are written to the 'Accuracy' sheet of an exported Excel workbook, what four specific summary columns are formatted in the resulting sheet?
What was checked, without and with the skill
Checked
Without skill
With skill
Includes Total Records as a column header in the accuracy metrics export sheet.
Missed
Passed
Includes Within 5% as a column header in the accuracy metrics export sheet.
Missed
Passed
case-23 · gemini-3.6-flash · 8/27/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md426 linessingle file
CWICR Historical Cost Tracker
Business Case
Problem Statement
Improving estimates requires:
Actual cost feedback
Historical comparisons
Trend analysis
Lessons learned
Solution
Track actual costs against CWICR estimates, build historical database, and use data to improve future estimating accuracy.
Business Value
Accuracy improvement - Learn from actuals
Benchmarking - Project comparisons
Trend analysis - Cost movement patterns
Organizational knowledge - Cost database
Technical Implementation
import pandas as pd
import numpy as np
from typing import Dict, Any, List, Optional
from dataclasses import dataclass, field
from datetime import datetime, date
from enum import Enum
import json
class ProjectStatus(Enum):
"""Project status."""
ESTIMATED = "estimated"
IN_PROGRESS = "in_progress"
COMPLETED = "completed"
CANCELLED = "cancelled"