AG Kit is a toolkit that gives Google Antigravity coding agents a structured workspace with rules, skills, specialist agents, workflows, persistent memory, orchestration, MCP guidance, and a safety hook. It is for building and operating agent workflows in Antigravity, and its catalogue entries provide parts of that workspace contract.
Borrowing it
Nothing to install: this file belongs to vudovn/ag-kit. 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/vudovn/ag-kit/main/.agents/skills/bash-linux/SKILL.mdgit clone --depth 1 https://github.com/vudovn/ag-kitWrote 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/vudovn/ag-kit/bash-linux)<a href="https://agentmods.dev/skills/vudovn/ag-kit/bash-linux"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/bash-linux/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/vudovn/ag-kit/bash-linux"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/bash-linux.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Tool Misuse · line 194 Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
- medium Data Exfiltration · line 95 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00029 | $0.01336 |
| Opus 5.5 | $0.00012 | $0.00534 |
| Sonnet 5.5 | $0.00006 | $0.00267 |
| Haiku 4.5 | $0.00003 | $0.00134 |
Grade B, and why
bash-linux scanned grade B with 2 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 1mo 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.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
| POST JSON | `curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' URL` | Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| Download | `curl -O https://example.com/file` | Copies of this mod
8 near-identical copies found in the catalogue:
- bash-linux — 97% identical, 3 lines differ
- bash-linux — 97% identical, 3 lines differ
- bash-linux — 92% identical, 2 lines differ
- bash-linux — 92% identical, 2 lines differ
- bash-linux — 92% identical, 2 lines differ
- bash-linux — 92% identical, 2 lines differ
- bash-linux — 92% identical, 2 lines differ
- bash-linux — 92% identical, 2 lines differ
How it starts
The opening of the file, as written. The whole thing — 202 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Bash Linux Patterns
Essential patterns for Bash on Linux/macOS.
1. Operator Syntax
Chaining Commands
| Operator | Meaning | Example |
|---|---|---|
; |
Run sequentially | cmd1; cmd2 |
&& |
Run if previous succeeded | npm install && npm run dev |
|| |
Run if previous failed | npm test || echo "Tests failed" |
| |
Pipe output | ls | grep ".js" |
2. File Operations
Essential Commands
| Task | Command |
|---|---|
| List all | ls -la |
| Find files | find . -name "*.js" -type f |
| File content | cat file.txt |
| First N lines | head -n 20 file.txt |
| Last N lines | tail -n 20 file.txt |
| Follow log | tail -f log.txt |
| Search in files | grep -r "pattern" --include="*.js" |
| File size | du -sh * |
| Disk usage | df -h |
3. Process Management
| Task | Command |
|---|---|
| List processes | ps aux |
| Find by name | ps aux | grep node |
| Kill by PID | kill -9 <PID> |
| Find port user | lsof -i :3000 |
| Kill port | kill -9 $(lsof -t -i :3000) |
| Background | npm run dev & |
| Jobs | jobs -l |
| Bring to front | fg %1 |
4. Text Processing
Core Tools
| Tool | Purpose | Example |
|---|---|---|
grep |
Search | grep -rn "TODO" src/ |
sed |
Replace | sed -i 's/old/new/g' file.txt |
awk |
Extract columns | awk '{print $1}' file.txt |
cut |
Cut fields | cut -d',' -f1 data.csv |
sort |
Sort lines | sort -u file.txt |
uniq |
Unique lines | sort file.txt | uniq -c |
wc |
Count | wc -l file.txt |
5. Environment Variables
| Task | Command |
|---|---|
| View all | env or printenv |
| View one | echo $PATH |
| Set temporary | export VAR="value" |
| Set in script | VAR="value" command |
| Add to PATH | export PATH="$PATH:/new/path" |
6. Network
| Task | Command |
|---|---|
| Download | curl -O https://example.com/file |
| API request | curl -X GET https://api.example.com |
| POST JSON | curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' URL |
| Check port | nc -zv localhost 3000 |
| Network info | ifconfig or ip addr |
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.
- 1mo ago First seen · 202 lines · 29 tokens per session scan B 63885db9a511
bash-linux is a skill published in the GitHub repository vudovn/ag-kit (8,190 stars, last pushed 16d ago), licensed MIT. It adds 29 tokens to every session and 1,336 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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