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 fastrevmd-lab/fwskillsshare --skill srx-advpngit clone --depth 1 https://github.com/fastrevmd-lab/fwskillsshareWrote 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/fastrevmd-lab/fwskillsshare/srx-advpn)<a href="https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/srx-advpn"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-advpn/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/fastrevmd-lab/fwskillsshare/srx-advpn"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-advpn.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00085 | $0.05652 |
| Opus 5 | $0.00043 | $0.02826 |
| Sonnet 5 | $0.00017 | $0.01130 |
| Haiku 4.5 | $0.00009 | $0.00565 |
Grade A, and why
srx-advpn 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 9d 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 — 371 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SRX Auto Discovery VPN (ADVPN)
Overview
ADVPN is hub-and-spoke IPsec that discovers spoke-to-spoke traffic and builds direct shortcut tunnels at runtime. The hub (the suggester) notices two spokes (partners) exchanging traffic through it, introduces them to each other over an IKEv2 extension, and the partners negotiate a direct IKE/IPsec shortcut. A dynamic routing protocol running over the overlay (typically OSPF) then reconverges so branch↔branch traffic takes the shortcut instead of hairpinning through the hub. Idle shortcuts tear down and traffic falls back to the hub path.
Core principle: the hub brokers introductions; routing — not selectors —
steers traffic onto shortcuts. That drives every design difference from
plain AutoVPN: a multipoint numbered st0, a routing protocol over the
overlay, and certificate authentication.
Certificates are effectively mandatory. On current Junos (field-verified on vSRX3 24.4R1.9 and 25.4R1.12), IKEv2 with
authentication-method pre-shared-keysfails commit wheneverdynamic ike-user-type(group-ike-id or shared-ike-id) is configured:When dynamic ike-user-type is configured, IKEv2 with authentication-method pre-shared-key is not allowed. ADVPN's group model therefore requires RSA/ECDSA certificate auth. Plan PKI first — do not burn a day on a PSK ADVPN that cannot commit.
Runtime intake
Before starting the workflow, inspect the request, supplied artifacts, and
available approved read-only evidence. If unresolved facts could materially
change safety, scope, correctness, confidence, or the requested output, read
references/runtime-intake.md.
For each unresolved material fact whose catalog condition is true, invoke Claude AskUserQuestion or Codex request_user_input before continuing or issuing an open-ended request.
Ask at most three single-select catalog questions per round. After each response, ask another round whenever any unresolved material catalog condition remains true; continue only when none remain. Do not repeat answered questions or show the full catalog.
Without a native tool, present each selected catalog question with its 2-3 labeled choices and a free-text Other path in concise plain text; do not substitute a generic checklist.
What ships with it
3 files 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.
- 9d ago First seen · 371 lines · 85 tokens per session scan A 3ac631541516
srx-advpn is a skill published in the GitHub repository fastrevmd-lab/fwskillsshare (8 stars, last pushed 12d ago), licensed MIT. It adds 85 tokens to every session and 5,652 once invoked, about $0.0004 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.
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