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 magnus919/agent-skills --skill tailscale-clientgit clone --depth 1 https://github.com/magnus919/agent-skillsWrote 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/magnus919/agent-skills/tailscale-client)<a href="https://agentmods.dev/skills/magnus919/agent-skills/tailscale-client"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/tailscale-client/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/magnus919/agent-skills/tailscale-client"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/tailscale-client.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 10 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 43 Tool calls are chained to bypass individual safety checks or escalate capabilities beyond what any single tool call would allow.Fix: Limit tool chaining depth and validate the output of each tool before passing it to the next. Require explicit user approval for multi-step chains.
- high Tool Misuse · line 46 Tool calls are chained to bypass individual safety checks or escalate capabilities beyond what any single tool call would allow.Fix: Limit tool chaining depth and validate the output of each tool before passing it to the next. Require explicit user approval for multi-step chains.
- high Tool Misuse · line 43 Tool calls are chained to bypass individual safety checks or escalate capabilities beyond what any single tool call would allow.Fix: Limit tool chaining depth and validate the output of each tool before passing it to the next. Require explicit user approval for multi-step chains.
- medium Privilege Escalation · line 43 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 46 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 145 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 146 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 56 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 63 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 95 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 | $0.00049 | $0.01765 |
| Opus 5.5 | $0.00020 | $0.00706 |
| Sonnet 5.5 | $0.00010 | $0.00353 |
| Haiku 4.5 | $0.00005 | $0.00177 |
Grade B, and why
tailscale-client 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 12d 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 rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
| **Debian/Ubuntu** | `curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/jammy.noarmor.gpg | sudo tee /usr/share/keyrings/tailscale-archive-keyring.gpg >/dev/null && curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/ Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| **Debian/Ubuntu** | `curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/jammy.noarmor.gpg | sudo tee /usr/share/keyrings/tailscale-archive-keyring.gpg >/dev/null && curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/ How it starts
The opening of the file, as written. The whole thing — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.
tailscale-client
Security preflight
Before enabling SSH, Serve, connector access or changing access policy, read the bundle's security triage. Also load it for Tailworm or suspected compromise. Preserve tested recovery access before disabling embedded SSH; check mode is not a forwarding fix. Treat reported findings as version-specific until current advisories establish applicability.
Confirm the target, scope, and rollback path before acting. Read-only discovery may proceed without confirmation.
Overview
Tailscale is a WireGuard-based mesh VPN that connects devices into a secure
tailnet. When used with Headscale, a
self-hosted open-source control server, the official Tailscale client connects
via the --login-server flag instead of Tailscale's SaaS control plane.
This skill covers client-side installation, authentication, diagnostics, and troubleshooting.
Architecture
[Client A] ───── WireGuard ───── [Client B]
│ │
└──────── Headscale URL ────────┘
(control/
coordination)
The Tailscale client (the tailscaled daemon) registers with the Headscale
control server, exchanges WireGuard keys, and establishes direct peer-to-peer
encrypted connections. When direct NAT traversal fails, traffic falls back
through DERP (Detour Encrypted Relay Protocol) relays.
Installation
Install the official Tailscale client on the target device:
| Platform | Command |
|---|---|
| Debian/Ubuntu | `curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/jammy.noarmor.gpg |
| macOS | brew install tailscale |
| Windows | choco install tailscale |
| Fedora/RHEL | sudo dnf install dnf-plugins-core && sudo dnf config-manager --add-repo https://pkgs.tailscale.com/stable/fedora/tailscale.repo && sudo dnf install tailscale |
| Alpine | apk add tailscale |
What ships with it
6 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.
- 12d ago Changed · +10 lines 1f733239990b
- 2mo ago First seen · 169 lines · 49 tokens per session scan B 4b52a2c1f82b
tailscale-client is a skill published in the GitHub repository magnus919/agent-skills (166 stars, last pushed 2d ago), licensed MIT. It adds 49 tokens to every session and 1,765 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B 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.
tailscale-client compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| tailscale-clientmagnus919/agent-skills | Skill | 166 | 2d ago | MIT | B | 49 | Claude Code |
| cocoreviewSnowflake-Labs/cocoplus | Skill | 727 | today | MIT | A | 57 | Claude Code |
| discussSnowflake-Labs/cocoplus | Skill | 727 | today | MIT | A | 54 | Claude Code |
| cocoharvestSnowflake-Labs/cocoplus | Skill | 727 | today | MIT | A | 68 | Claude Code |
| cocoscoutSnowflake-Labs/cocoplus | Skill | 727 | today | MIT | A | 59 | Claude Code |
| bloomSnowflake-Labs/cocoplus | Skill | 727 | today | MIT | A | 47 | Claude Code |
| klatchSnowflake-Labs/cocoplus | Skill | 727 | today | MIT | A | 54 | Claude Code |