Borrowing it
Nothing to install: this file belongs to JNTMTMTM/eIsland. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/JNTMTMTM/eIsland/main/.claude/skills/eisland-dev-add-maxexpand-tab/SKILL.mdgit clone --depth 1 https://github.com/JNTMTMTM/eIslandWrote 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/jntmtmtm/eisland/eisland-dev-add-maxexpand-tab)<a href="https://agentmods.dev/skills/jntmtmtm/eisland/eisland-dev-add-maxexpand-tab"><img src="https://agentmods.dev/badge/skills/jntmtmtm/eisland/eisland-dev-add-maxexpand-tab/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/jntmtmtm/eisland/eisland-dev-add-maxexpand-tab"><img src="https://agentmods.dev/badge/skills/jntmtmtm/eisland/eisland-dev-add-maxexpand-tab.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 | $0.00165 | $0.01747 |
| Opus 5 | $0.00082 | $0.00873 |
| Sonnet 5 | $0.00033 | $0.00349 |
| Haiku 4.5 | $0.00016 | $0.00175 |
Grade A, and why
eisland-dev-add-maxexpand-tab 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 11d 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.
The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- 11d ago First seen · 194 lines · 165 tokens per session scan A 80f4f7975fe7
eisland-dev-add-maxexpand-tab is a skill published in the GitHub repository JNTMTMTM/eIsland (311 stars, last pushed today), licensed GPL-3.0. It adds 165 tokens to every session and 1,747 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.
Other skills, from other repositories
weapp-vite-react-best-practices
A Chinese-language guide for building React 19 WeChat mini programs with weapp-vite and @weapp-vite/react. WeChat mini programs are small apps that run inside WeChat.
webiny-v5-to-v6-migration
Migration patterns for converting v5 Webiny code to v6 architecture. Use this skill when migrating existing v5 plugins to v6 features, converting context plugins to DI services, adapting v5 event subscriptions to v6 EventHandlers, or understanding how v5 patterns translate to v6. Targeted at AI agents performing…
localize-page
Convert or refactor Solana.com monorepo pages and their directly owned components to the repository's shared i18n system. Use when asked to internationalize, localize, remove hard-coded user-facing copy from, add translations to, or audit a page or route in apps/web, apps/docs, apps/media, apps/templates…
i18n-localization
Internationalization and localization patterns. Detecting hardcoded strings, managing translations, locale files, RTL support.
speak-status
A skill for checking which Claude Code session CC Mascot is currently set to speak. CC Mascot is an app that reads Claude Code responses aloud.
speak-this
A session-setting command for the CC Mascot app, which makes the mascot speak only for the current Claude Code session. It records the current session ID in the app’s active-session file.