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.
npx skills add Jerry0022/dotclaude --skill claude-extend-skillgit clone --depth 1 https://github.com/Jerry0022/dotclaudeWrote 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.
[](https://agentmods.dev/skills/jerry0022/dotclaude/claude-extend-skill)<a href="https://agentmods.dev/skills/jerry0022/dotclaude/claude-extend-skill"><img src="https://agentmods.dev/badge/skills/jerry0022/dotclaude/claude-extend-skill/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jerry0022/dotclaude/claude-extend-skill"><img src="https://agentmods.dev/badge/skills/jerry0022/dotclaude/claude-extend-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00055 | $0.01038 |
| Opus 5 | $0.00028 | $0.00519 |
| Sonnet 5 | $0.00011 | $0.00208 |
| Haiku 4.5 | $0.00006 | $0.00104 |
Grade A, and why
claude-extend-skill 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Extend Skill — Interactive Extension Scaffolding
Scaffold or adapt a project-level extension for any devops skill.
Step 0 — Load Extensions
Check for optional overrides. Use Glob to verify each path exists before reading. Do NOT call Read on files that may not exist — skip missing files silently (no output).
- Global:
~/.claude/skills/claude-extend-skill/SKILL.md+reference.md - Project:
{project}/.claude/skills/claude-extend-skill/SKILL.md+reference.md - Merge: project > global > plugin defaults
Step 1 — Detect project root
Find the project root (nearest .git/ or .claude/ parent). All extension
paths are relative to this root. Store as {project}.
Step 2 — Determine target skill
If a skill name was passed as argument, use it. Otherwise:
- List all available plugin skills by scanning the plugin's
skills/directory - Also check for agent extensions in
agents/ - Present the list via AskUserQuestion:
"Welchen Plugin-Skill möchtest du für dieses Projekt erweitern?"
Options: ship, commit, debug, explain, new-issue, project-setup, readme, ...
Validate that the chosen name matches an existing plugin skill. If not, warn and re-ask.
Step 3 — Check for existing extension
Scan {project}/.claude/skills/{skill-name}/ for:
SKILL.mdreference.md
If extension exists
Report what was found:
"Extension für
/{skill-name}existiert bereits:"
SKILL.md— [exists/missing]reference.md— [exists/missing]
Read and display the existing files. Ask:
"Möchtest du die bestehende Extension anpassen oder eine fehlende Datei ergänzen?"
Options:
- SKILL.md bearbeiten/erstellen
- reference.md bearbeiten/erstellen
- Beide anzeigen und manuell entscheiden
- Abbrechen
For editing, ask the user what they want to change and apply edits. For creating a missing file, proceed to Step 4 for that file only.
If no extension exists
Proceed to Step 4 to scaffold both files.
Step 4 — Scaffold extension 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.
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.
- 8d ago First seen · 126 lines · 55 tokens per session scan A b41c258063bd
claude-extend-skill is a skill published in the GitHub repository Jerry0022/dotclaude (5 stars, last pushed yesterday), licensed MIT. It adds 55 tokens to every session and 1,038 once invoked, about $0.0003 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 2026-08-31.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
local-ai-agents
Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…
next-partial-prefetching-adoption
Turn on Partial Prefetching in a Next.js app and work through the insights it surfaces. Use when the user wants to enable or adopt Partial Prefetching, flip the partialPrefetching flag, opt routes in with export const prefetch = 'partial', audit Link prefetch={true} behavior, preserve existing prefetched UI with…
chronicle
Analyze Copilot session history for standup reports, usage tips, session search, and session reindexing. Use when the user asks for a standup, daily summary, usage tips, workflow recommendations, wants to search or find past sessions by keyword/file/PR, wants to reindex their session store, or asks about deleting…