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Agent skill

Heartbeat

by MagicCube in MagicCube/agentara

Proactive intelligence pulse — scans user's memory files (USER.md, SOUL.md) to identify current interests, investments, projects, and concerns, then performs targeted web searches to find noteworthy…

No licenceAuto-check passedProductivity & Automation

Install Heartbeat

skills CLI
$ npx skills add MagicCube/agentara --skill heartbeat -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install MagicCube/agentara heartbeat --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/MagicCube/agentara.git skills-src && mkdir -p .claude/skills && cp -r skills-src/user-home/.claude/skills/heartbeat .claude/skills/heartbeat && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
heartbeat
GitHub stars
516
Token cost
~1.9k tokens
SKILL.md length
931 words
Files
1
Skills in repo
21
Repo updated
First seen
Licence
None found

At a glance

Proactive intelligence pulse — scans user's memory files (USER.md, SOUL.md) to identify current interests, investments, projects, and concerns, then performs targeted web searches to find noteworthy…

  • Works in 5 steps: Read Memory → Read News → Search → …
  • The system needs to check if theres anything worth proactively notifying the user about — like a scheduled heartbeat check
  • SKILL.md covers Philosophy, Step 1: Read Memory, Step 2: Read News and Step 3: Search, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Heartbeat is an agent skill from MagicCube/agentara. Proactive intelligence pulse — scans user's memory files (USER.md, SOUL.md) to identify current interests, investments, projects, and concerns, then performs targeted web searches to find noteworthy updates. Returns a concise briefing if something deserves attention, or [SKIPPED] if nothing warrants interruption. Use this skill when the system needs to check if there's anything worth proactively notifying the user about — like a scheduled heartbeat check, a "what's new" sweep, or when the user asks "anything I…

Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Productivity & Automation, covering Web search. The repository describes itself as: Your 24/7 personal assistant powered by Claude Code and OpenAI Codex. Multi-channel messaging, long-term memory, skills, task scheduling, session management, and more — all…

When your agent uses it

  • The system needs to check if theres anything worth proactively notifying the user about — like a scheduled heartbeat check
  • A whats new sweep
  • The user asks anything I should know?
  • What did I miss?

Example prompts

  • “sweep, or when the user asks”
  • “what did I miss?”
  • “any updates?”
  • “/heartbeat”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Read Memory
  2. Read News
  3. Search
  4. Evaluate — The "Worth Interrupting" Test
  5. Output

What it can do on your machine

Read from SKILL.md and the folder at commit 5621a96. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • hnrss.org
    • producthunt.com
    • github.com
    • news.google.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Heartbeat loads about 1.9k tokens when it runs. Until then it costs about 172 tokens; SKILL.md has 931 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~172
When it runs · the whole SKILL.md, loaded when a task matches
~1.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 931 words (~1,922 tokens).

“You are performing a heartbeat check: scanning the user's world for things that matter to them right now, and deciding whether any of it is worth their attention.”

— opening of SKILL.md by MagicCube
name
heartbeat

Read the full SKILL.md on GitHub

Files

Just SKILL.md in user-home/.claude/skills/heartbeat of MagicCube/agentara.

Open the folder on GitHubat commit 5621a96

Compare with similar skills

Heartbeat next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Heartbeat compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Heartbeat this skillMagicCube/agentara516—~1.9kAutomated safety check: PassNone
Brave Searchbadlogic/pi-skills2.6k6 repos~592Automated safety check: PassMIT
Enterprise AI Scenario MapMetaInFLow/Enterprise-ai-scenario-map-skill632—~1.8kAutomated safety check: PassMIT
Web Searchjjyaoao/HelloAgents3.2k1 repos~5.6kAutomated safety check: PassMIT
Ddg SearchTheSyart/claude-agent-examples4051 repos~493Automated safety check: PassNone
Local Web SearchuluckyXH/OpenMOSS1.3k—~392Automated safety check: NotesMIT

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  • Brave Search

    badlogic/pi-skills

    Web search and content extraction via Brave Search API. An agent skill from badlogic/pi-skills.

    2.6k GitHub starsUsed in 6 repos~592 tokens
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  • Enterprise AI Scenario Map

    MetaInFLow/Enterprise-ai-scenario-map-skill

    企业AI场景地图生成报告工具。通过 web-search 深度调研企业信息，按照V2.1标准模板生成结构化AI应用场景地图报告，包含企业画像、业务诊断、行业实践、AI场景全量表、实施路径等完整内容。

    632 GitHub stars~1.8k tokensUpdated 6 mo ago
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  • Web Search

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    3.2k GitHub starsUsed in 1 repo~5.6k tokens
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  • Ddg Search

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    405 GitHub starsUsed in 1 repo~493 tokens
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  • Local Web Search

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  • Pulse

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  • Video Poster Design

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  • Lab Interpreter

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Categories

Questions about Heartbeat

What does Heartbeat do?

Proactive intelligence pulse — scans user's memory files (USER.md, SOUL.md) to identify current interests, investments, projects, and concerns, then performs targeted web searches to find noteworthy…. Heartbeat is an agent skill from MagicCube/agentara.md) to identify current interests, investments, projects, and concerns, then performs targeted web searches to find noteworthy updates.

When should I use Heartbeat?

Heartbeat fits situations like: the system needs to check if theres anything worth proactively notifying the user about — like a scheduled heartbeat check; A whats new sweep; the user asks anything I should know?; what did I miss?.

How do I install Heartbeat in Claude Code?

Run `npx skills add MagicCube/agentara --skill heartbeat -a claude-code`. Or copy the skill folder (user-home/.claude/skills/heartbeat in MagicCube/agentara) into .claude/skills/heartbeat in your project. Claude Code loads it when a task matches its description.

How do I install Heartbeat in Codex?

Run `npx skills add MagicCube/agentara --skill heartbeat -a codex`. Or copy the skill folder (user-home/.claude/skills/heartbeat in MagicCube/agentara) into .agents/skills/heartbeat in your project. Codex loads it when a task matches its description.

Can I use Heartbeat in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add MagicCube/agentara --skill heartbeat -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/heartbeat, .gemini/skills/heartbeat, .github/skills/heartbeat and .opencode/skills/heartbeat in your project.

What does Heartbeat need to run?

SKILL.md names no scripts, command-line tools or credentials: Heartbeat is instructions for the agent only.

Does Heartbeat access the network?

SKILL.md names 4 domains. As links in the text: hnrss.org, producthunt.com, github.com and news.google.com. This is read from the text; nothing was executed.

Is Heartbeat safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Heartbeat use?

No licence was found for Heartbeat or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Heartbeat use?

About 1.9k tokens (SKILL.md is roughly 7.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Heartbeat?

Skills that share tags, products or a category with Heartbeat: Brave Search (badlogic/pi-skills, 2.6k stars), Enterprise AI Scenario Map (MetaInFLow/Enterprise-ai-scenario-map-skill, 632 stars), Web Search (jjyaoao/HelloAgents, 3.2k stars) and Ddg Search (TheSyart/claude-agent-examples, 405 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Heartbeat?

MagicCube (a GitHub user) maintains it in MagicCube/agentara, which has 516 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on May 11, 2026.

Source: MagicCube/agentara on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.