Borrowing it
Nothing to install: this file belongs to Rasukarusan/shellnium. 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/Rasukarusan/shellnium/master/CLAUDE.mdgit clone --depth 1 https://github.com/Rasukarusan/shellniumWrote 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/instructions/rasukarusan/shellnium/claude-md)<a href="https://agentmods.dev/instructions/rasukarusan/shellnium/claude-md"><img src="https://agentmods.dev/badge/instructions/rasukarusan/shellnium/claude-md/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/instructions/rasukarusan/shellnium/claude-md"><img src="https://agentmods.dev/badge/instructions/rasukarusan/shellnium/claude-md.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 | $0.00642 | $0.00642 |
| Opus 5.5 | $0.00257 | $0.00257 |
| Sonnet 5.5 | $0.00128 | $0.00128 |
| Haiku 4.5 | $0.00064 | $0.00064 |
Grade A, and why
shellnium CLAUDE.md scanned grade A with 1 finding 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 2mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Shellnium is a Selenium WebDriver implementation for Bash/Zsh. It enables browser automation directly from the terminal using W3C WebDriver protocol over curl + jq. How it starts
The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Project Overview
Shellnium is a Selenium WebDriver implementation for Bash/Zsh. It enables browser automation directly from the terminal using W3C WebDriver protocol over curl + jq.
Repository Structure
lib/— Core library (core.sh, setup.sh, selenium.sh, util.sh)tests/— Bats test suite (unit tests + syntax/shellcheck validation)examples/— Practical usage examples (scraping, form fill, login, etc.)demo.sh,demo2.sh,demo3.sh— Demo scriptsscripts/— CI/sandbox setup scripts
Common Commands
Bootstrap
# Install optional local runtime dependencies for running demos on the host
make bootstrap
Linting
# ShellCheck on repository shell scripts
make lint
Testing
# Run the standard Docker-first verification pipeline
make ci
# Run lint and tests locally only if the host already has shellcheck and bats
make ci-local
Docker
# Build image
make docker-build
# Run ShellCheck + tests inside container
make docker-test
# Run browser smoke test inside container
make docker-smoke
Claude Code on the Web
ShellCheck and Bats are not pre-installed in the cloud sandbox environment (Claude Code on the Web). Run the setup script first.
# 1. Setup (install ShellCheck + Bats)
SANDBOX=1 bash scripts/sandbox-setup.sh
# 2. Standard verification
make ci
Notes:
scripts/sandbox-setup.shruns when the env varCLAUDE_CODE_REMOTE=trueorSANDBOX=1is set- Docker is unavailable in the sandbox due to network restrictions. Run Docker tests in CI (GitHub Actions) instead
- Setup logs are written to
/tmp/shellnium-setup/
Code Style
- Quote all variable expansions:
"${var}"not$var - Use
localfor function-scoped variables - Use snake_case for function names
- No stray
echodebug output - Shell dialect: Bash (
-s bashfor ShellCheck) - Exclude SC1091 (source not followed) in ShellCheck:
shellcheck -s bash -e SC1091
Architecture Notes
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.
- 2mo ago First seen · 88 lines · 642 tokens per session scan A 12d68cca8c5e
shellnium CLAUDE.md is an instructions file published in the GitHub repository Rasukarusan/shellnium (183 stars, last pushed 23d ago), licensed MIT. It adds 642 tokens to every session, about $0.0026 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
shellnium CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| shellnium CLAUDE.mdRasukarusan/shellnium | Instructions file | 183 | 23d ago | MIT | A | 642 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |