Codebase Cost Estimator

Q: What is a Claude Code skill and how does the Codebase Cost Estimator skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Codebase Cost Estimator is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: communication · Last updated: 2026-06-09

Estimate the full development cost of an existing codebase from lines of code, architectural complexity, and team-composition overhead. Use for 'how much would this cost to build', 'what did this codebase cost', development-cost or build-cost estimates, calendar-time estimates, and Claude/AI ROI on a delivered codebase. Estimates by measured LOC and complexity, not by ticket volume. For financial reporting from accounting exports (CFO briefings, burn rate, runway) see finance-ops.

From the source SKILL.md

Estimate what it cost (or would cost) to build an existing codebase. The estimate is driven by measured lines of code and complexity — not by ticket count, story points, or feature lists. Always present a range with explicit assumptions; never a single number.

What this skill does

Codebase Cost Estimator is a community-contributed Claude Code skill in the communication sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/codebase-cost-estimator/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Codebase Cost Estimator Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 119,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/codebase-cost-estimator
curl -L https://claudskills.com/skills/codebase-cost-estimator/SKILL.md \
  -o ~/.claude/skills/codebase-cost-estimator/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/codebase-cost-estimator/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/codebase-cost-estimator/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\codebase-cost-estimator\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Codebase Cost Estimator Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/codebase-cost-estimator/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Codebase Cost Estimator skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Codebase Cost Estimator skill?

Use Codebase Cost Estimator when your Claude Code task falls under the General category — specifically in the communication area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Codebase Cost Estimator" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Codebase Cost Estimator skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Codebase Cost Estimator is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/LazyIsEfficient/agentic-os/blob/HEAD/.claude/skills/codebase-cost-estimator/SKILL.md
Author: LazyIsEfficient

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

LazyIsEfficient. (2026). Codebase Cost Estimator [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/codebase-cost-estimator/

BibTeX

@misc{codebase-cost-estimator-2026,
  author    = {LazyIsEfficient},
  title     = {Codebase Cost Estimator [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/codebase-cost-estimator/}
}

Embed this skill

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Badge

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