project-sizing-guide SKILL.md skillA
project-sizing-guide from zebbern/claude-code-guide is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add zebbern/claude-code-guide/project-sizing-guide@git:20260531.164971dPins git:20260531.164971d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- zebbern/claude-code-guide
- Path
skills/project-sizing-guide/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260531.164971d, committed May 31, 2026
- Size
- 12,372 bytes
- Repository stars
- 4,700
- License
- MIT
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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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}]'
```
---
## Method Selection Guide
| Scenario | Recommended Method | Rationale |
|----------|-------------------|-----------|
…Read the whole file at its exact version.
How to install
mdr add zebbern/claude-code-guide/project-sizing-guide@sha256:0ab796082c500898The line at the top of this page pins the label git:20260531.164971d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_e26fsdwbzlah3sil)
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Versions
The registry has recorded 1 version of this file, committed on May 31, 2026.
Audit of the latest version
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- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
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- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
zebbern/claude-code-guide · 4,700 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e26fsdwbzlah3sil GET https://markdownregistry.com/api/v1/resolve?ref=zebbern/claude-code-guide/project-sizing-guide GET https://markdownregistry.com/api/v1/blob/0ab796082c5008980188b60c462caa86b71586081b9e41f39dcfd360e8791042
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.