Antigravity Skill Vault is a collection of reusable Agent Skills for Google Antigravity, covering software development, operations, security, and business work. It is for people who want Antigravity agents to follow specialized expertise, personas, and structured workflows. The catalogue skills are entries from this collection.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/rmyndharis/antigravity-skillsnpx agentmods add skills/rmyndharis/antigravity-skills/firmware-analystWrote 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/rmyndharis/antigravity-skills/firmware-analyst)<a href="https://agentmods.dev/skills/rmyndharis/antigravity-skills/firmware-analyst"><img src="https://agentmods.dev/badge/skills/rmyndharis/antigravity-skills/firmware-analyst/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/rmyndharis/antigravity-skills/firmware-analyst"><img src="https://agentmods.dev/badge/skills/rmyndharis/antigravity-skills/firmware-analyst.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 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 Privilege Escalation · line 158 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- medium Privilege Escalation · line 230 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium Privilege Escalation · line 233 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
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 | $0.00066 | $0.01872 |
| Opus 5.5 | $0.00026 | $0.00749 |
| Sonnet 5.5 | $0.00013 | $0.00374 |
| Haiku 4.5 | $0.00007 | $0.00187 |
Grade A, and why
firmware-analyst scanned grade A 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 13d 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.
Asks for rootlowPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo chroot squashfs-root /usr/bin/qemu-arm-static /bin/sh Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
wget http://vendor.com/firmware/update.bin How it starts
The opening of the file, as written. The whole thing — 321 lines — stays where its author put it; the contents beside it link to each section on GitHub.
# Download from vendor
wget http://vendor.com/firmware/update.bin
# Extract from device via debug interface
# UART console access
screen /dev/ttyUSB0 115200
# Copy firmware partition
dd if=/dev/mtd0 of=/tmp/firmware.bin
# Extract via network protocols
# TFTP during boot
# HTTP/FTP from device web interface
Hardware Methods
UART access - Serial console connection
JTAG/SWD - Debug interface for memory access
SPI flash dump - Direct chip reading
NAND/NOR dump - Flash memory extraction
Chip-off - Physical chip removal and reading
Logic analyzer - Protocol capture and analysis
Use this skill when
- Working on download from vendor tasks or workflows
- Needing guidance, best practices, or checklists for download from vendor
Do not use this skill when
- The task is unrelated to download from vendor
- You need a different domain or tool outside this scope
Instructions
- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
Firmware Analysis Workflow
Phase 1: Identification
# Basic file identification
file firmware.bin
binwalk firmware.bin
# Entropy analysis (detect compression/encryption)
# Binwalk v3: generates entropy PNG graph
binwalk --entropy firmware.bin
binwalk -E firmware.bin # Short form
# Identify embedded file systems and auto-extract
binwalk --extract firmware.bin
binwalk -e firmware.bin # Short form
# String analysis
strings -a firmware.bin | grep -i "password\|key\|secret"
Phase 2: Extraction
# Binwalk v3 recursive extraction (matryoshka mode)
binwalk --extract --matryoshka firmware.bin
binwalk -eM firmware.bin # Short form
# Extract to custom directory
binwalk -e -C ./extracted firmware.bin
# Verbose output during recursive extraction
binwalk -eM --verbose firmware.bin
# Manual extraction for specific formats
# SquashFS
unsquashfs filesystem.squashfs
# JFFS2
jefferson filesystem.jffs2 -d output/
# UBIFS
ubireader_extract_images firmware.ubi
# YAFFS
unyaffs filesystem.yaffs
# Cramfs
cramfsck -x output/ filesystem.cramfs
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.
- 13d ago Changed · +1 lines 7787370db98c
- 1mo ago First seen · 320 lines · 66 tokens per session scan A 833c3710f0fc
firmware-analyst is a skill published in the GitHub repository rmyndharis/antigravity-skills (1,866 stars, last pushed 13d ago), licensed MIT. It adds 66 tokens to every session and 1,872 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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