dev-summary

dev-summary is a skill for Claude Code, Codex from nasrulhazim/claude. It costs 161 tokens per session (1,698 once invoked), scanned A, original, MIT.

A tool that reads the history of one or more Git repositories and summarises their development over time. A repository is a project folder tracked by Git, and the summary includes dates, commits, files, contributors, and commit frequency.

In plain words
What is it for?
Use it to produce quick or detailed development summaries, compare repositories, and create an HTML timeline dashboard with charts.
Why use it?
It removes the need to inspect each repository's log separately or calculate project timelines by hand. It combines multiple repositories into one overview when a project is split across them.

Skill for Claude CodeCodex

Part of the claude-toolkit plugin — 36 skills, 12 commands, 20 agents shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/nasrulhazim/claude/dev-summary
Any agent
npx skills add nasrulhazim/claude --skill dev-summary
Clone the repo
git clone --depth 1 https://github.com/nasrulhazim/claude

Made for: Claude Code, Codex.

Or install claude-toolkit, the plugin that ships this one along with the rest of its 36 skills, 12 commands, 20 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dev-summary

README.md
[![agentmods](https://agentmods.dev/badge/skills/nasrulhazim/claude/dev-summary.svg)](https://agentmods.dev/skills/nasrulhazim/claude/dev-summary)
Your own site
<a href="https://agentmods.dev/skills/nasrulhazim/claude/dev-summary"><img src="https://agentmods.dev/badge/skills/nasrulhazim/claude/dev-summary.svg" alt="Measured on agentmods" height="20"></a>
Per session 161 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,698 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00161 $0.01698
Opus 5 $0.00081 $0.00849
Sonnet 5 $0.00032 $0.00340
Haiku 4.5 $0.00016 $0.00170

Measured 5d ago against content hash 0d3630fc3cef, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

dev-summary scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/dev-summary/SKILL.md · 227 lines

How it starts

The opening of the file, as written. The whole thing — 227 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Dev Summary — Multi-Repo Development Stats & Timeline

Scans git repositories and produces combined development summaries with commit stats, timelines, and optional detailed reports.

Command Reference

Command Purpose
/dev-summary quick Quick summary table — dates + commit counts
/dev-summary detailed Detailed report — files, contributors, frequency
/dev-summary timeline HTML timeline dashboard with charts

/dev-summary quick

Generate a quick combined summary table for one or more repos.

Steps

  1. Get repo paths — ask the user for repo paths if not provided. Accept:

    • Current directory (default)
    • Multiple paths (comma or space separated)
    • Glob patterns (e.g., ~/Projects/2026/*)
  2. For each repo, extract:

    # First commit date
    git log --reverse --format="%ai" | head -1
    
    # Latest commit date
    git log --format="%ai" | head -1
    
    # Total commits
    git log --oneline | wc -l
    
  3. Present combined table:

    ## Development Summary
    
    | Repo | Mula | Latest | Commits |
    |---|---|---|---|
    | **repo-name** | DD Mon YYYY | DD Mon YYYY | N |
    | **TOTAL** | **earliest** | **latest** | **sum** |
    
    - **Duration**: N days (N weeks)
    - **Average**: ~N commits/day across all repos
    
  4. Run all repo scans in parallel — use parallel tool calls for each repo to minimize wait time.

Notes

  • Repo name is derived from directory name
  • Dates formatted as DD Mon YYYY (e.g., 8 Jan 2026)
  • Duration calculated from earliest first commit to latest last commit
  • Average commits/day = total commits / duration days

/dev-summary detailed

Generate a detailed development report with file counts, contributors, and commit frequency analysis.

Steps

  1. Run quick summary first — get base stats from /dev-summary quick

  2. For each repo, additionally extract:

    # Source file count (excluding vendor/node_modules/.git)
    find . -not -path './.git/*' -not -path './vendor/*' \
           -not -path './node_modules/*' -not -path './dist/*' \
           -type f | wc -l
    
    # Unique contributors
    git log --format="%aN <%aE>" | sort -u
    
    # Commits per month (last 6 months)
    git log --format="%Y-%m" | sort | uniq -c | tail -6
    
    # Most active day
    git log --format="%ai" | cut -d' ' -f1 | sort | uniq -c | sort -rn | head -1
    
    # Language/stack detection (check for key files)
    # composer.json → PHP/Laravel
    # package.json → Node/JS
    # go.mod → Go
    # Cargo.toml → Rust
    # pyproject.toml → Python
    

Read the full file on GitHub · 227 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 227 lines · 161 tokens per session scan A 0d3630fc3cef

Subscribe to this mod's changes

dev-summary is a skill published in the GitHub repository nasrulhazim/claude (22 stars, last pushed 3d ago), licensed MIT. It adds 161 tokens to every session and 1,698 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.