agentmods.dev

startstop

startstop is a skill for Claude Code from cyrus-cai/claude-cobrain. It costs 10 tokens per session (212 once invoked), scanned A, original, MIT.

A control command for starting or stopping the cobrain background service.

In plain words
What is it for?
Starting cobrain before use or stopping it when you want it to exit.
Why use it?
It gives you a direct way to turn the service on or off when it is not needed or is not running correctly.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT variable.

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 claude-cobrain plugin — 7 skills, 1 command, 1 hook shipped together

not rated 5repo 8mo ago A scan 10 tokens original MIT

Good fit Starting cobrain before use or stopping it when you want it to exit.

Compare 6 skills from other repositories ↓
View source ↗ cyrus-cai/claude-cobrain claude-cobrain-web.vercel.app
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 cyrus-cai/claude-cobrain
Claude Code
/plugin install claude-cobrain

Made for: Claude Code.

Or install claude-cobrain, the plugin that ships this one along with the rest of its 7 skills, 1 command, 1 hook.

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 startstop

README.md
[![agentmods](https://agentmods.dev/badge/skills/cyrus-cai/claude-cobrain/startstop/github.svg)](https://agentmods.dev/skills/cyrus-cai/claude-cobrain/startstop)
Your own site
<a href="https://agentmods.dev/skills/cyrus-cai/claude-cobrain/startstop"><img src="https://agentmods.dev/badge/skills/cyrus-cai/claude-cobrain/startstop/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.

agentmods 80×15 button for startstop

Your own site · 80×15
<a href="https://agentmods.dev/skills/cyrus-cai/claude-cobrain/startstop"><img src="https://agentmods.dev/badge/skills/cyrus-cai/claude-cobrain/startstop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 10 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 212 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00010 $0.00212
Opus 5.5 $0.00004 $0.00085
Sonnet 5.5 $0.00002 $0.00042
Haiku 4.5 $0.00001 $0.00021

Measured 2mo ago against content hash 1fc9d0c87258, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

startstop 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 2mo 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.

plugin/skills/startstop/SKILL.md · 24 lines

What it actually says

startstop

Action is passed as context: start or stop.

Run the unified controller script in direct python3 mode (no LaunchAgent).

if [[ -n "${CLAUDE_PLUGIN_ROOT:-}" && -f "${CLAUDE_PLUGIN_ROOT}/scripts/control.sh" ]]; then
  CONTROL_SCRIPT="${CLAUDE_PLUGIN_ROOT}/scripts/control.sh"
elif [[ -f "./plugin/scripts/control.sh" ]]; then
  CONTROL_SCRIPT="./plugin/scripts/control.sh"
else
  CONTROL_SCRIPT="$(ls -dt "$HOME"/.claude/plugins/cache/*/claude-cobrain/*/scripts/control.sh 2>/dev/null | head -1)"
fi
[[ -n "${CONTROL_SCRIPT:-}" && -f "$CONTROL_SCRIPT" ]] || { echo "control.sh not found. Run: /claude-cobrain:cobrain install"; exit 1; }

bash "$CONTROL_SCRIPT" "$ACTION"
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. 2mo ago First seen · 24 lines · 10 tokens per session scan A 1fc9d0c87258

Subscribe to this mod's changes

startstop is a skill published in the GitHub repository cyrus-cai/claude-cobrain (5 stars, last pushed 8mo ago), licensed MIT. It adds 10 tokens to every session and 212 once invoked, about $0.0000 per session on Opus 5.5. 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.

Claude CodeDevOps and cloudclaudeclaude-skills
Related

startstop compared with skills from other repositories

startstop next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
startstopcyrus-cai/claude-cobrainSkill58mo agoMITA10Claude Code
exploratory-data-analysisK-Dense-AI/scientific-agent-skillsSkill56k5d agoMITA83Claude Code
webhook-managementhoangsonww/Claude-Code-Agent-MonitorSkill1.1kyesterdayMITA56Claude Code, Codex
gesellschaftsrechtliche-satzungen-agbKlotzkette/claude-fuer-deutsches-rechtSkill1.8kyesterdayApache-2.0A69Claude Code
accessibility-patternsvibeeval/vibecosystemSkill5392d agoMITA24Claude Code, Codex
design-reviewjezweb/claude-skillsSkill1.1k28d agoMITA108Claude Code
react-patternsjezweb/claude-skillsSkill1.1k28d agoMITA110Claude Code