attach

A command that follows a running Crabbox coordinator job and prints its events as they happen. It can use a live connection or switch to an HTTPS event feed if the live connection fails.

In plain words
What is it for?
Use it to monitor a run by ID, start reading after a specific event number, or set the polling interval.
Why use it?
It lets you watch a job without repeatedly checking its status, while avoiding duplicate events and preserving standard output and error output separately.

Command

Install

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.

agentmods
npx agentmods add commands/openclaw/crabbox/attach
Clone the repo
git clone --depth 1 https://github.com/openclaw/crabbox
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 747 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00747
Opus 5 $0.00000 $0.00374
Sonnet 5 $0.00000 $0.00149
Haiku 4.5 $0.00000 $0.00075

Measured yesterday against content hash 775e4346f8e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

attach 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 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.

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.

docs/commands/attach.md · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

attach

crabbox attach follows the recorded events of an active coordinator run and prints them as they arrive, exiting when the run finishes.

crabbox attach run_abcdef123456
crabbox attach --id run_abcdef123456 --after 42
crabbox attach run_abcdef123456 --poll 500ms

The run id may be passed as a positional argument or via --id; both forms are equivalent. Run ids look like run_<hex>.

How it works

attach first tries the authenticated coordinator control WebSocket, which streams run events live. If the socket cannot be dialed, fails to subscribe, or errors mid-stream before the run finishes, attach falls back to the HTTPS events API and keeps reading from the last sequence number it printed. Either way it advances a running cursor so no event is shown twice.

Events are routed by stream:

  • stdout and stderr preview events are written back to stdout and stderr respectively, preserving the original stream split;
  • all other events (lease, bootstrap, sync, command-start, command-finish, release, and similar lifecycle events) are printed to stderr as a single line carrying the sequence number, event type, phase, timestamp, and message.

When the WebSocket falls behind the run's current sequence, attach drains the backlog in bounded pages, re-subscribing after each full page, before waiting on live pushes. When the run is already finished, attach prints any remaining events and exits. When the run is still active, it waits for streamed events or polls until it observes the run leave the running state.

attach is a viewer, not detached execution. It follows the events the original CLI emitted while running the command; it does not own or control that command. If the original CLI process dies, the run remains inspectable through history, events, and logs, but attach cannot resume or restart it.

Bounded output

Output preview events are a bounded view of the command output. The coordinator stores run logs in 64 KiB chunks up to an 8 MiB cap and marks the run truncated when that cap is exceeded. For the full retained output after a run completes, use logs.

Read the full file on GitHub · 82 lines

Changes

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.

  1. yesterday First seen · 82 lines · 0 tokens per session scan A 775e4346f8e9

Subscribe to this mod's changes

attach is a command published in the GitHub repository openclaw/crabbox (1,343 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 747 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.