check

check is a skill for Claude Code from spacegrowth/claude-relay. It costs 45 tokens per session (393 once invoked), scanned A, original, MIT.

A command for checking whether another agent session has finished and reported its result. It can check one session or all sessions and records states such as busy, reported, stalled, or dead.

In plain words
What is it for?
Use it to poll sessions, detect missing reports or stalled processes, and automatically park completed sessions when appropriate.
Why use it?
It removes the need to inspect each terminal manually to learn whether work is complete or a session has stopped unexpectedly.

Skill for Claude Code

Written for Claude Code: arguments in frontmatter. Also seen: mentions Claude Code.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the relay plugin — 17 skills, 1 agent, 4 hooks shipped together

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add spacegrowth/claude-relay
Claude Code
/plugin install relay

Made for: Claude Code.

Or install relay, the plugin that ships this one along with the rest of its 17 skills, 1 agent, 4 hooks.

Wrote 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.

agentmods badge for check

README.md
[![agentmods](https://agentmods.dev/badge/skills/spacegrowth/claude-relay/check.svg)](https://agentmods.dev/skills/spacegrowth/claude-relay/check)
Your own site
<a href="https://agentmods.dev/skills/spacegrowth/claude-relay/check"><img src="https://agentmods.dev/badge/skills/spacegrowth/claude-relay/check.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 393 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 5.1 $0.00045 $0.00393
Opus 5 $0.00023 $0.00197
Sonnet 5 $0.00009 $0.00079
Haiku 4.5 $0.00005 $0.00039

Measured 6d ago against content hash a4432a7c7991, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

check 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 6d 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.

skills/check/SKILL.md · 28 lines

What it actually says

Call relay as ${CLAUDE_PLUGIN_ROOT}/bin/relay (Claude Code substitutes the plugin's absolute path when this skill loads) — not bare relay, which often isn't on the Bash tool's non-interactive PATH.

If $session_id is given, run: ${CLAUDE_PLUGIN_ROOT}/bin/relay check $session_id

Otherwise run: ${CLAUDE_PLUGIN_ROOT}/bin/relay check --all

Liveness is judged by the executor's recorded process id, not its tab title — Claude Code mutates its own iTerm tab title while working, so a title change never by itself means the executor died. Status flips: busyreported once the report file exists (a report means done, regardless of process/tab state); → stalled if the process died with no report but the tab's still open, or it's been busy far longer than expected; → dead only when the process is gone AND the tab has closed. A stalled session needs you to look at that tab directly — relay check only detects it, it doesn't fix it.

check also runs the auto-close sweep on the session(s) it checks: a finished executor whose report you've already seen gets parked once its work has landed (claimed files clean in the worktree) or it has idled past auto_close_idle_minutes — printed as a 🛏 line. Nothing is lost; /relay:send resumes it. Pin with relay keep <sid> if a follow-up is imminent.

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. 6d ago First seen · 28 lines · 45 tokens per session scan A a4432a7c7991

Subscribe to this mod's changes

check is a skill published in the GitHub repository spacegrowth/claude-relay (1 stars, last pushed yesterday), licensed MIT. It adds 45 tokens to every session and 393 once invoked, about $0.0002 per session on Opus 5. 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 2026-08-31.

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