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 Knuckles-Team/tunnel-manager --skill tunnel-manager-ssh-hardeninggit clone --depth 1 https://github.com/Knuckles-Team/tunnel-managerWrote 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/knuckles-team/tunnel-manager/tunnel-manager-ssh-hardening)<a href="https://agentmods.dev/skills/knuckles-team/tunnel-manager/tunnel-manager-ssh-hardening"><img src="https://agentmods.dev/badge/skills/knuckles-team/tunnel-manager/tunnel-manager-ssh-hardening/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/knuckles-team/tunnel-manager/tunnel-manager-ssh-hardening"><img src="https://agentmods.dev/badge/skills/knuckles-team/tunnel-manager/tunnel-manager-ssh-hardening.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 | $0.00118 | $0.01141 |
| Opus 5.5 | $0.00047 | $0.00456 |
| Sonnet 5.5 | $0.00024 | $0.00228 |
| Haiku 4.5 | $0.00012 | $0.00114 |
Grade A, and why
tunnel-manager-ssh-hardening 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 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.
Unrestricted tool accesslowExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
add host aliases (use tunnel-manager-host-inventory) or to run arbitrary commands Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tunnel Manager — SSH Hardening & Audit
Move a fleet onto key-based auth and assess its security posture via the
tunnel-manager MCP server.
When to use
- Set up passwordless (key) auth to one host or a whole group.
- Build a full-mesh SSH trust so every host can reach every other.
- Rotate the SSH key fleet-wide and distribute a shared
~/.ssh/config. - Run a security audit, compliance check, or vulnerability scan against a host.
When NOT to use
- Registering / removing host aliases →
tunnel-manager-host-inventory. - One-off command execution or file copy →
tunnel-manager-remote-execution. - Container/service security posture →
container-manager/security-tools.
Prerequisites & environment
Connect via the mcp-client skill against the tunnel-manager MCP server.
Initial key setup / mesh needs a working credential (password or an existing key)
to bootstrap from.
| Variable | Required | Notes |
|---|---|---|
TUNNEL_INVENTORY / TUNNEL_INVENTORY_GROUP |
optional | Fleet scope for tm_inventory |
TUNNEL_IDENTITY_FILE |
optional | Shared key path (default ~/.ssh/id_shared) |
TUNNEL_PARALLEL / TUNNEL_MAX_THREADS |
optional | Parallel fan-out controls |
Tools & actions
| Condensed tool | Actions |
|---|---|
tm_inventory |
configure_key_auth, mesh_bootstrap, rotate_key, copy_ssh_config |
tm_remote |
setup_passwordless, rotate_key, copy_ssh_config, test_key_auth (single host) |
tm_security |
security_audit, compliance_check, vulnerability_scan, access_control_audit |
tm_system |
get_info, discover_services, analyze_logs, network_topology |
Key parameters
group,parallel,max_threads— fleet scope + fan-out ontm_inventory.key/key_type(ed25519|rsa) — key material for setup / rotation.new_key— target path forrotate_key.remote_host,username,identity_file— target fortm_security/tm_system.standard—cis_benchmark|pci_dss|hipaaforcompliance_check.scan_type—basic|package|configforvulnerability_scan.
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.
- 1mo ago First seen · 92 lines · 118 tokens per session scan A 7d836f1e77de
tunnel-manager-ssh-hardening is a skill published in the GitHub repository Knuckles-Team/tunnel-manager (2 stars, last pushed 2d ago), licensed MIT. It adds 118 tokens to every session and 1,141 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
quantum-vqe
A runnable guide to the variational quantum eigensolver (VQE), a quantum algorithm that estimates the lowest energy of a mathematical system by adjusting a parameterized circuit. It uses Pauli Hamiltonians, a specified circuit form, and SciPy optimization.
quantum-vqls
A runnable guide to the variational quantum linear solver (VQLS), a quantum method that estimates a solution to a system of linear equations by optimizing a parameterized circuit. It uses Qiskit and reports the numerical residual and why optimization stopped.
python-feature-lifecycle
Guidance for package and feature lifecycle in the Agent Framework Python codebase, including stage meanings, feature-stage decorators, feature enums, and how to move APIs from one stage to the next.
prowler-ui
Prowler UI-specific patterns. For generic patterns, see: typescript, react-19, nextjs-16, tailwind-4. Trigger: When working inside ui/ on Prowler-specific conventions (shadcn, folder placement, actions/adapters, shared types/hooks/lib).
prowler-pr
Creates Pull Requests for Prowler following the project template and conventions. Trigger: When working on pull request requirements or creation (PR template sections, PR title Conventional Commits check, changelog gate/no-changelog label), or when inspecting PR-related GitHub workflows like conventional-commit.yml…
prowler-test-api
Testing patterns for Prowler API: JSON:API, Celery tasks, RLS isolation, RBAC. Trigger: When writing tests for api/ (JSON:API requests/assertions, cross-tenant isolation, RBAC, Celery tasks, viewsets/serializers).