Building Pydantic AI Agents
docling-project/docling
Patterns and tested examples for building agents with Pydantic AI: tools, capabilities, structured output, dependency injection, hooks, YAML specs, streaming and testing.
Create a new heartbeat (proactive agent scheduled with a decision prompt) for EvoNexus.
Custom licenceAuto-check passed
Install Create Heartbeat
$ npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install evolution-foundation/evo-nexus create-heartbeat --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/evolution-foundation/evo-nexus.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/create-heartbeat .claude/skills/create-heartbeat && rm -rf skills-srcUse ~/.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/
Install the "create-heartbeat" agent skill from https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeat into .claude/skills/create-heartbeat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-heartbeat", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeatType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install evolution-foundation/evo-nexus create-heartbeat --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/evolution-foundation/evo-nexus.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/create-heartbeat .agents/skills/create-heartbeat && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "create-heartbeat" agent skill from https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeat into .agents/skills/create-heartbeat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-heartbeat", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install evolution-foundation/evo-nexus create-heartbeat --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/evolution-foundation/evo-nexus.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/create-heartbeat .cursor/skills/create-heartbeat && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "create-heartbeat" agent skill from https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeat into .cursor/skills/create-heartbeat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-heartbeat", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/evolution-foundation/evo-nexus.git --path .claude/skills/create-heartbeat--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install evolution-foundation/evo-nexus create-heartbeat --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/evolution-foundation/evo-nexus.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/create-heartbeat .gemini/skills/create-heartbeat && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "create-heartbeat" agent skill from https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeat into .gemini/skills/create-heartbeat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-heartbeat", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install evolution-foundation/evo-nexus create-heartbeatInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/evolution-foundation/evo-nexus.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/create-heartbeat .github/skills/create-heartbeat && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "create-heartbeat" agent skill from https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeat into .github/skills/create-heartbeat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-heartbeat", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install evolution-foundation/evo-nexus create-heartbeat --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/evolution-foundation/evo-nexus.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/create-heartbeat .opencode/skills/create-heartbeat && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "create-heartbeat" agent skill from https://github.com/evolution-foundation/evo-nexus/tree/main/.claude/skills/create-heartbeat into .opencode/skills/create-heartbeat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-heartbeat", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
create-heartbeat- GitHub stars
- 545
- Token cost
- ~1k tokens
- SKILL.md length
- 442 words
- Files
- 1
- Skills in repo
- 117
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Create a new heartbeat (proactive agent scheduled with a decision prompt) for EvoNexus.
- Works in 6 steps: Understand the trigger → Compose the decision prompt → Pick wake triggers → …
- The user says create a heartbeat
- SKILL.md covers When to use, Step 1: Understand the trigger, Step 2: Compose the decision… and Step 3: Pick wake triggers, plus 4 more sections
- Calls make
What it does
Create Heartbeat is an agent skill from evolution-foundation/evo-nexus. Create a new heartbeat (proactive agent scheduled with a decision prompt) for EvoNexus. Guides the user through picking an agent, setting interval, wake triggers, and the decision prompt that governs when the agent acts. Writes to config/heartbeats.yaml with pydantic validation. Use when the user says 'create a heartbeat', 'make X agent proactive', 'wake Y every 4h', 'automate X to check state and act', or wants to turn a manual state check into a scheduled protocol-run.
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with Pydantic. The repository describes itself as: The open source operating system for AI-powered businesses.
When your agent uses it
- The user says create a heartbeat
- Make X agent proactive
- Wake Y every 4h
- Automate X to check state and act
Example prompts
- “create a heartbeat”
- “make X agent proactive”
- “wake Y every 4h”
- “/create-heartbeat”
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- Understand the trigger
- Compose the decision prompt
- Pick wake triggers
- Required secrets (optional)
- Write to YAML
- Guide the user
What it can do on your machine
Read from SKILL.md and the folder at commit 7f5dd76. 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
Shell commands in SKILL.md call:
make
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Create Heartbeat loads about 1k tokens when it runs. Until then it costs about 123 tokens; SKILL.md has 442 words of instructions outside code blocks.
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 442 words (~1,024 tokens).
“Create a new heartbeat — a proactive agent that wakes on a schedule, runs the 9-step protocol, and decides whether to act.”
- name
- create-heartbeat
Files
Just SKILL.md in .claude/skills/create-heartbeat of evolution-foundation/evo-nexus.
Open the folder on GitHubat commit 7f5dd76
Compare with similar skills
Create 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Create Heartbeat this skillevolution-foundation/evo-nexus | 545 | — | ~1k | Automated safety check: Pass | Custom licence | |
| Building Pydantic AI Agentsdocling-project/docling | 69k | — | ~2.8k | Automated safety check: Pass | MIT | |
| Datachain Knowledgedatachain-ai/datachain | 2.8k | — | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Fastcrudbenavlabs/fastcrud | 1.6k | — | ~5k | Automated safety check: Pass | MIT | |
| Building Pydantic AI Agentspydantic/pydantic-ai | 20k | — | ~8k | Automated safety check: Pass | MIT | |
| Investor Panel Stock Reviewwbh604/UZI-Skill | 7.1k | — | ~757 | Automated safety check: Pass | MIT |
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Works with
Questions about Create Heartbeat
What does Create Heartbeat do?
Create a new heartbeat (proactive agent scheduled with a decision prompt) for EvoNexus. Create Heartbeat is an agent skill from evolution-foundation/evo-nexus. Create a new heartbeat (proactive agent scheduled with a decision prompt) for EvoNexus.
When should I use Create Heartbeat?
Create Heartbeat fits situations like: the user says create a heartbeat; make X agent proactive; wake Y every 4h; automate X to check state and act.
How do I install Create Heartbeat in Claude Code?
Run `npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a claude-code`. Or copy the skill folder (.claude/skills/create-heartbeat in evolution-foundation/evo-nexus) into .claude/skills/create-heartbeat in your project. Claude Code loads it when a task matches its description.
How do I install Create Heartbeat in Codex?
Run `npx skills add evolution-foundation/evo-nexus --skill create-heartbeat -a codex`. Or copy the skill folder (.claude/skills/create-heartbeat in evolution-foundation/evo-nexus) into .agents/skills/create-heartbeat in your project. Codex loads it when a task matches its description.
Can I use Create 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 evolution-foundation/evo-nexus --skill create-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/create-heartbeat, .gemini/skills/create-heartbeat, .github/skills/create-heartbeat and .opencode/skills/create-heartbeat in your project.
What does Create Heartbeat need to run?
Going by SKILL.md and its folder, Create Heartbeat needs the command-line tools its instructions call (make).
Does Create Heartbeat access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Create 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 Create Heartbeat use?
Create Heartbeat has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Create Heartbeat use?
About 1k tokens (SKILL.md is roughly 4.1k 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 Create Heartbeat?
Skills that share tags, products or a category with Create Heartbeat: Building Pydantic AI Agents (docling-project/docling, 69k stars), Datachain Knowledge (datachain-ai/datachain, 2.8k stars), Fastcrud (benavlabs/fastcrud, 1.6k stars) and Building Pydantic AI Agents (pydantic/pydantic-ai, 20k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Create Heartbeat?
evolution-foundation (a GitHub organization) maintains it in evolution-foundation/evo-nexus, which has 545 GitHub stars. The repository holds 117 skills in this directory. The repository was last updated on May 13, 2026.
Source: evolution-foundation/evo-nexus on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.