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 agentmods add commands/openclaw/crabbox/tunnelgit clone --depth 1 https://github.com/openclaw/crabboxWhat 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 | $0.00000 | $0.00540 |
| Opus 5 | $0.00000 | $0.00270 |
| Sonnet 5 | $0.00000 | $0.00108 |
| Haiku 4.5 | $0.00000 | $0.00054 |
Grade A, and why
tunnel 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 3d 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 — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.
tunnel
crabbox tunnel opens one foreground SSH local port-forward to a resolved
lease. The local listener and remote destination are both fixed to
127.0.0.1; only the port numbers vary.
crabbox tunnel --id blue-box 3000
crabbox tunnel --id blue-box --local-port 8080 3000
crabbox tunnel --provider ssh --id buildbox 4173
The positional argument is the remote TCP port. --local-port is optional. If
it is omitted or set to 0, Crabbox chooses an available local port.
Readiness and output
The command prints exactly one URL after the tracked SSH process owns an IPv4 loopback listener and a TCP connection to that listener succeeds:
http://127.0.0.1:49152
It does not print the URL merely because ssh launched. The URL is convenient
for HTTP development servers; the forward itself is ordinary TCP.
After printing readiness, the command stays in the foreground until Ctrl-C, SIGTERM, or parent context cancellation. Teardown uses the same owned process-group/job-object path as pond SSH forwards, so the SSH root and any ProxyCommand descendants are reaped together.
Flags
--id <lease-id-or-slug> required lease identifier
--local-port <port> local loopback port; omit or use 0 for automatic
--provider <name> provider selection
--network <mode> auto, public, or tailscale target resolution
--reclaim claim the lease for the current repository
Provider and target-specific SSH flags are also accepted. The provider must resolve an SSH target; delegated-only providers are rejected.
Credential handling
Crabbox resolves the target internally. Secret SSH usernames, ProxyCommand policy, key and certificate paths, and host-key settings live in a private temporary OpenSSH config rather than the Crabbox-launched ssh argv or environment variables. OpenSSH executes the provider-resolved ProxyCommand under that provider's existing transport contract. Config-backed targets materialize only route fields, so unrelated configured forwards, TTY requests, and remote commands are not inherited. The config is removed after the forward exits.
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.
- 3d ago First seen · 63 lines · 0 tokens per session scan A f450d5456eca
tunnel is a command published in the GitHub repository openclaw/crabbox (1,343 stars, last pushed 3d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 540 tokens. 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 2026-08-30.
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