Code Stats Agent Skill

Analyze codebase with tokei (fast line counts by language) and difft (semantic AST-aware diffs). Get quick project overview without manual counting. Triggers on: how big is codebase, count lines of code, what languages, show semantic diff, compare files, code statistics.

12k tokens

context cost

the whole folder, loaded on every use

files

ships runnable scripts

copies elsewhere

how many repositories repackaged it

404

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/aiskillstore/marketplace --skill code-stats

What comes with it

47 012 bytes besides the instruction

assets/.gitkeep

references/difft-advanced.md

references/tokei-advanced.md

scripts/.gitkeep

skill-report.json

The instruction itself

8 sections, as written by the author

Code Statistics

Quickly analyze codebase size, composition, and changes.

tokei - Line Counts

# Count all code
tokei

# Compact output sorted by code
tokei --compact --sort code

# Specific languages
tokei --type=TypeScript,JavaScript

# Exclude directories
tokei --exclude node_modules --exclude dist

# JSON output for scripting
tokei --output json | jq '.Total.code'

Sample Output

===============================================================================
 Language            Files        Lines         Code     Comments       Blanks
===============================================================================
 TypeScript             45        12847         9823         1456         1568
 JavaScript             12         2341         1876          234          231
-------------------------------------------------------------------------------
 Total                  57        15188        11699         1690         1799
===============================================================================

difft - Semantic Diffs

# Compare files
difft old.ts new.ts

# Inline mode
difft --display=inline old.ts new.ts

# With git
GIT_EXTERNAL_DIFF=difft git diff
GIT_EXTERNAL_DIFF=difft git show HEAD~1

Why Semantic?

| Traditional diff | difft |

|-----------------|-------|

| Line-by-line | AST-aware |

| Shows moved as delete+add | Recognizes moves |

| Whitespace sensitive | Ignores formatting |

Quick Reference

| Task | Command |

|------|---------|

| Count all code | tokei |

| Compact output | tokei --compact |

| Sort by code | tokei --sort code |

| TypeScript only | tokei -t TypeScript |

| JSON output | tokei --output json |

| Exclude dir | tokei --exclude node_modules |

| Semantic diff | difft file1 file2 |

| Git diff | GIT_EXTERNAL_DIFF=difft git diff |

When to Use

Getting quick codebase overview
Comparing code changes semantically
Understanding project composition
Reviewing refactoring impact
Tracking codebase growth

Additional Resources

For detailed patterns, load:

./references/tokei-advanced.md - Filtering, output formats, CI integration
./references/difft-advanced.md - Display modes, git integration, language support

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How to use it

Copy the folder

Take aiskillstore/code-stats from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.

Install what it needs

The instructions reference brew, cargo, go. Without those the skill loads but fails at the first command.