{"slug": "show-hn-pyunto-invite-an-ai-agent-and-a-robot-into-an-encrypted-diary", "title": "Show HN: Pyunto – invite an AI agent and a robot into an encrypted diary", "summary": "Pyunto launched a private diary app that lets users invite an AI agent or robot as a member, with the agent software installable via `pip install 'pyunto-agent[qr]'` and an MCP server listed in the official MCP Registry as `com.pyunto/diary` with 12 tools. The agent runs on a computer the user controls, decrypts diary text in that process rather than on Pyunto's servers, and newly created spaces use end-to-end encryption, though some older spaces use an earlier key scheme. The diary is free with one agent or robot per account, while Pyunto+ is a per-space subscription that adds one agent plus one robot to that space, with one subscriber covering every member.", "body_md": "# A diary your agent or robot can join.\n\nPyunto is a private diary app for one person, two people, or a group. You can invite an AI agent or a robot into a diary as a member. A person writes on their phone, and your agent replies, or your robot acts, in the same thread.\n\n**Their phone** The Pyunto app. They write\n\n*\"Bench 80kg 5x5, felt heavy\"*.\n\n⇄\n\n**Your computer**\n\n`pyunto-agent` decrypts it here, asks your model, and posts the reply.\n## Two ways to connect an AI\n\n### Agent: it answers your users\n\nRuns in the background and replies in the diary. The character is a Markdown file you write, such as a strength coach, a language tutor or a clinic follow-up. One process serves every diary it has been invited into.\n\n```\npip install 'pyunto-agent[qr]'\npyunto-agent pair\npyunto-agent run --backend claude-api \\\n  --persona coach.md\n```\n\n### MCP: Claude reads your diary\n\nIn the official MCP Registry as `com.pyunto/diary`\n\nAn MCP server for Claude Code or Claude Desktop, with 12 tools. Search months of entries, summarize a week, or write an entry from your desk. It speaks only when asked.\n\n```\nclaude mcp add pyunto-diary -- \\\n  uvx pyunto-agent mcp\n# then: \"pair with my Pyunto diary\"\n```\n\n## Robots\n\nWrite *\"go and find some sunlight, and bring back power\"* in plain words. The robot posts its plan before it moves, reports each step as it finishes, and attaches photos from its own camera. A local language model reads the instruction, so the diary is not sent anywhere to be understood.\n\nTo connect your own machine, you write one class with one method. The SDK handles the encrypted transport, pairing and replies. Six simulated robots ship with it.\n\n```\npip install 'pyunto-robotics[llm]'\npyunto-robotics showqr\npython\nclass MyRobot:\n    def run(self, action, argument=None, where=None, expect=None) -> SkillResult: ...\n```\n\n## What is private\n\n- Your agent or robot runs on a computer you control. Diary text is decrypted in that process, not on Pyunto's servers.\n- Newly created spaces use end-to-end encryption. Some older spaces use an earlier key scheme. [How the encryption works](https://pyunto.com/encryption.html) .\n- Every invitation is approved by a person, who sees who runs the agent first.\n- In a group of three or more, an agent replies only when it is mentioned. Robots act only on instructions from people.\n- If your agent uses a cloud model, entries go to that provider. Tell the people in the diary.\n\n## Plans\n\nThe diary is free, including one agent or robot per account. Pyunto+ is a subscription per space and adds one agent plus one robot to that space. One subscriber covers every member.", "url": "https://wpnews.pro/news/show-hn-pyunto-invite-an-ai-agent-and-a-robot-into-an-encrypted-diary", "canonical_source": "https://pyunto.com/", "published_at": "2026-09-29 13:04:25+00:00", "updated_at": "2026-09-29 13:18:41.902792+00:00", "lang": "en", "topics": ["ai-agents", "ai-products", "artificial-intelligence", "agent-protocols", "robotics"], "entities": ["Pyunto", "pyunto-agent", "pyunto-robotics", "Claude", "Claude Code", "Claude Desktop", "MCP Registry", "Pyunto+"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/show-hn-pyunto-invite-an-ai-agent-and-a-robot-into-an-encrypted-diary", "markdown": "https://wpnews.pro/news/show-hn-pyunto-invite-an-ai-agent-and-a-robot-into-an-encrypted-diary.md", "text": "https://wpnews.pro/news/show-hn-pyunto-invite-an-ai-agent-and-a-robot-into-an-encrypted-diary.txt", "jsonld": "https://wpnews.pro/news/show-hn-pyunto-invite-an-ai-agent-and-a-robot-into-an-encrypted-diary.jsonld"}}