An installer for the cobrain background service. It checks for Python, Ollama, required Python packages, and the qwen3-vl model before installing and starting the service.

Installing cobrain in the default folder or in a custom absolute path, then starting it after its requirements are available.

It handles the setup checks and installation needed to run cobrain directly with Python.

install — Skill for Claude Code by cyrus-cai

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cyrus-cai/claude-cobrain/install/github.svg)](https://agentmods.dev/skills/cyrus-cai/claude-cobrain/install)

Your own site

<a href="https://agentmods.dev/skills/cyrus-cai/claude-cobrain/install"><img src="https://agentmods.dev/badge/skills/cyrus-cai/claude-cobrain/install/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cyrus-cai/claude-cobrain/install"><img src="https://agentmods.dev/badge/skills/cyrus-cai/claude-cobrain/install.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 783 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.

Model	Per session	Once invoked
Fable 5.1	$0.00019	$0.00783
Opus 5	$0.00010	$0.00392
Sonnet 5	$0.00004	$0.00157
Haiku 4.5	$0.00002	$0.00078

Measured 11d ago against content hash 70ca71a379f4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

install 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 11d 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/install/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

install

Install claude-cobrain daemon and start it with python3 directly.

Language

Infer language from the user's message. If there is no context, default to English.

Options

English (default)
中文简体
中文繁体
日本语
한국어
Others (allow user to specify)

Source files

Find the plugin root directory. The plugin root directory is most likely in <USER_ROOT>/.claude/plugins/.

Required source files:

<CLAUDE_PLUGIN_ROOT>/scripts/cobrain.py - daemon script to copy
<CLAUDE_PLUGIN_ROOT>/scripts/control.sh - process controller script

Execution principle

Minimize user approval prompts: chain independent shell commands with && into single Bash calls.

Flow

1. Choose output directory

Default: ~/.claude/cobrain
Allow custom absolute path if user asks.
Resolve to absolute path and use it as OUTPUT_DIR.

2. Prerequisite check (one-shot, 1 Bash call)

Run all checks in a single command:

command -v python3 && python3 --version && \
command -v ollama && ollama --version && \
python3 -c "import PIL, ollama; print('ok')" && \
ollama list | grep qwen3-vl

If success: skip installation steps.

If failure: install only missing prerequisites.

Missing Python 3: brew install python
Missing Ollama CLI: brew install ollama
Missing Python packages: pip3 install Pillow ollama
Missing model: ollama pull qwen3-vl:2b

3. Deploy files (1 Bash call)

Chain file operations into one Bash call:

Create OUTPUT_DIR if needed.
Copy daemon script from <CLAUDE_PLUGIN_ROOT>/scripts/cobrain.py to <OUTPUT_DIR>/cobrain.py.
Copy controller script from <CLAUDE_PLUGIN_ROOT>/scripts/control.sh to <OUTPUT_DIR>/control.sh and chmod +x.
Write .source_repo marker to <OUTPUT_DIR>/.source_repo.
Remove stale pid file <OUTPUT_DIR>/cobrain.pid if it exists.

4. Start service (1 Bash call)

Run direct python3 start through the controller:

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 "$CONTROL_SCRIPT" ]] || { echo "control.sh not found"; exit 1; }
bash "$CONTROL_SCRIPT" start

Read the full file on GitHub · 103 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.

11d ago First seen · 103 lines · 19 tokens per session scan A 70ca71a379f4

Subscribe to this mod's changes

install is a skill published in the GitHub repository cyrus-cai/claude-cobrain (5 stars, last pushed 6mo ago), licensed MIT. It adds 19 tokens to every session and 783 once invoked, about $0.0001 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.

Claude Code DevOps and cloud claude claude-skills

exploratory-data-analysis

Perform bounded, local exploratory analysis of explicitly supported scientific files. Use for redacted CSV/TSV/JSON profiles; optional NumPy, HDF5, FASTA/FASTQ, and basic image metadata inspection; missingness/leakage audits; outlier and transformation sensitivity; and rigorous EDA report scaffolds. Other domain…

K-Dense-AI/scientific-agent-skills · 83 tokens

google-ads-audit

Google Ads account audit and business context setup. Use for account-health audits and business-context setup. Trigger on "audit my ads", "ads audit", "set up my ads", "onboard", "account overview", "how's my account", "ads health check", "what should I fix in my ads", or when the user is new to NotFair and hasn't run…

nowork-studio/notfair-plugin · 86 tokens

data-charts-tako

Search and visualize the world's data - get charts, insights, and embeddable knowledge cards for finance, economics, demographics, sports, and more.

gooseworks-ai/goose-skills · 35 tokens

webhook-management

Configure and validate CCAM webhook targets across supported chat, incident, automation, and generic providers. Use when listing provider requirements, creating or updating a target, scoping it to alert rules, sending a test notification, reviewing delivery history, or deleting a target.

hoangsonww/Claude-Code-Agent-Monitor · 56 tokens

gesellschaftsrechtliche-satzungen-agb

Für Gesellschaftsrechtliche Satzungen AGB Abgrenzung: ordnet Norm, Beweislast und Gegenargument; Ergebnis: Prüfprodukt mit Risiko und nächstem Schritt. Fachgebiet: AGB-Recht-Prüfer. Route: gesellschaftsrechtliche-satzungen-agb.

Klotzkette/claude-fuer-deutsches-recht · 69 tokens

master-yinguang

A reference-based assistant for questions about Yinguang and Pure Land Buddhism, a Buddhist tradition focused on faith, ethical living, and practice connected with rebirth in the Pure Land. It can answer in Yinguang’s historical teaching style.

xr843/Master-skill · 274 tokens

install

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

install

Language

Options

Source files

Execution principle

Flow

1. Choose output directory

2. Prerequisite check (one-shot, 1 Bash call)

3. Deploy files (1 Bash call)

4. Start service (1 Bash call)

What this file has done since we first saw it

Other skills, from other repositories

exploratory-data-analysis

google-ads-audit

data-charts-tako

webhook-management

gesellschaftsrechtliche-satzungen-agb

master-yinguang