doncheli-estimate skill
Estimate effort, duration and cost using 4 complementary models (Function Points, Planning Poker AI, COCOMO, Historical). Activate when user mentions "estimate", "estimation", "effort", "how long", "cost", "story points", "sizing".
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Install the doncheli-estimate skill
A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description.
git clone --depth 1 https://github.com/doncheli/don-cheli-sdd.git /tmp/don-cheli-sdd mkdir -p ~/.claude/skills cp -r /tmp/don-cheli-sdd/.agent/skills/doncheli-estimate ~/.claude/skills/doncheli-estimate
available in every project
In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub
The instructions your agent would load
SKILL.md as published, without the frontmatter. Read it on GitHub
Don Cheli: Estimation Engine
Instructions
- Read the feature, story or task description
- Run all 4 estimation models independently (treat each as a separate agent):
- Function Points: count inputs, outputs, queries, files, interfaces; apply complexity weights
- Planning Poker AI: 3 independent agents guess simultaneously (pessimist, realist, optimist), then reconcile using Delphi method
- COCOMO II: classify project size (Organic / Semi-detached / Embedded), apply effort equation
- Historical: look for comparable past tasks in .dc/hallazgos.md and docs/; extrapolate velocity
- Compute the consolidated estimate with 90% confidence interval
- Flag hidden risks that inflate variance
Output Format
## Estimation: <feature name>
| Model | Estimate | Unit | Confidence |
|------------------|------------|------------|------------|
| Function Points | X | hours | medium |
| Planning Poker | X–Y | story pts | high |
| COCOMO II | X | person-days| medium |
| Historical | X | days | low/med |
**Consolidated:** X–Y days (90% CI)
**Key assumptions:** …
**Top 3 risks that increase variance:** …Quality Gate
- All 4 models must be executed; do not skip any
- If Historical has no comparable baseline, mark as N/A and explain
- If Planning Poker spread > 2x, escalate: ask the user to clarify scope before finalizing
Do not use this skill when
- The task is trivially small (< 1 hour) — just state it directly
- The user is asking for a rough gut-feel order of magnitude; use a one-liner instead
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