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 Unique-Divine/jiyuu --skill tailscale-servegit clone --depth 1 https://github.com/Unique-Divine/jiyuuWrote 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/unique-divine/jiyuu/tailscale-serve)<a href="https://agentmods.dev/skills/unique-divine/jiyuu/tailscale-serve"><img src="https://agentmods.dev/badge/skills/unique-divine/jiyuu/tailscale-serve/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/unique-divine/jiyuu/tailscale-serve"><img src="https://agentmods.dev/badge/skills/unique-divine/jiyuu/tailscale-serve.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 | $0.00124 | $0.02105 |
| Opus 5 | $0.00062 | $0.01052 |
| Sonnet 5 | $0.00025 | $0.00421 |
| Haiku 4.5 | $0.00012 | $0.00211 |
Grade A, and why
tailscale-serve 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 yesterday.
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.
WSL or localhost proxy targets, phone testing over a tailnet, and curl/OpenSSL How it starts
The opening of the file, as written. The whole thing — 274 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tailscale Serve
Use this skill when helping a user expose a local HTTP service to devices in
their tailnet through command tailscale serve. The common mental model is:
- The browser opens the HTTPS
.ts.netURL. - Tailscale Serve accepts HTTPS on the serving machine, usually on port
443. - Tailscale Serve terminates TLS with a certificate for the MagicDNS hostname.
- Tailscale Serve proxies the request to the local target, such as
http://127.0.0.1:3000.
The target URL is local to the machine running command tailscale serve; it is
not the URL that the phone or remote device should open.
Machine administration
Manage tailnet machines at:
https://login.tailscale.com/admin/machines
To open it from WSL, use wslview, not macOS's open command:
wslview 'https://login.tailscale.com/admin/machines'
To revoke a machine's access, use its ... menu and choose Remove.
Admin console prerequisites
Check these before spending time on the web app:
- The serving machine and client device are in the same tailnet.
- Tailscale is connected on both devices.
- The Tailscale admin console has MagicDNS enabled.
- The Tailscale admin console has HTTPS Certificates enabled under the DNS page.
- The user understands the public-ledger implication: enabling HTTPS certificates publishes the machine name and tailnet DNS name through the certificate transparency system.
- ACLs allow the client device or user to reach the serving machine.
Admin console path:
Admin Console -> DNS -> MagicDNS
Admin Console -> DNS -> HTTPS Certificates -> Enable HTTPS
If the user is not a tailnet admin or owner, ask them to have an admin enable the HTTPS certificate setting. Without that setting, Serve can still store an HTTPS config, but the HTTPS endpoint can fail during the TLS handshake.
Standard serve flow
Use this flow for a local HTTP dev server on port 3000.
curl -v http://127.0.0.1:3000/
tailscale status
tailscale ip -4
tailscale serve reset
tailscale serve --bg --https=443 http://127.0.0.1:3000
tailscale serve status
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.
- yesterday Changed · +16 lines a3341976fd38
- 9d ago First seen · 258 lines · 124 tokens per session scan A f8ea44fda505
tailscale-serve is a skill published in the GitHub repository Unique-Divine/jiyuu (6 stars, last pushed yesterday), licensed MIT. It adds 124 tokens to every session and 2,105 once invoked, about $0.0006 per session on Opus 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 2026-08-31.
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