Hacker News

Show HN: Tennis, a local/offline context store

Hacker News - Fri, 10/16/2026 - 11:17am

Hi everyone! I'm Joe, and I built Tennis: a CLI that indexes and searches your context offline. You can index any files, your Chat & Claude sessions, Codex history, etc. All local and offline.

I've always hated having chats siloed in Claude and not having an easy way to connect that context in other apps. Anything that exists today has a subscription and is stored on their servers, and really wanted something fast, local, and offline.

How Tennis works: * SQLite/FTS5 (keyword) + vec0 (vector) * model2vec / potion-retrieval-32M (512-dim, 123MB). This is a flat vector table, and what helps make this work well local/offline. * RRF (k=60) fuses BM25 keyword rank + cosine semantic rank into one score

Tennis also creates markdown files called 'cards' at indexing time. This gives you an easy, summarized, human readable format to see what Tennis has. You can edit these files (but won't change the embeddings in SQLite).

You can use Tennis via API and MCP. It's incredibly fast, and the MCP works great as a connector to different applications (ChatGPT, Claude, Opencode, etc).

You can install and use it today: https://tennis.jlachance1.workers.dev/

Thanks for checking this out! I would love any feedback. Thank you

Comments URL: https://news.ycombinator.com/item?id=50119473

Points: 2

# Comments: 0

Categories: Hacker News

Claude finds people for you and talks to them

Hacker News - Fri, 10/16/2026 - 11:15am

Article URL: https://lamoom.com/

Comments URL: https://news.ycombinator.com/item?id=50119451

Points: 2

# Comments: 1

Categories: Hacker News

GrabCalc: Online Calculators

Hacker News - Fri, 10/16/2026 - 11:15am

Article URL: https://grabcalc.com/

Comments URL: https://news.ycombinator.com/item?id=50119448

Points: 2

# Comments: 0

Categories: Hacker News

Not a Game of Snake

Hacker News - Fri, 10/16/2026 - 7:02am
Categories: Hacker News

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