os-june

Why June

Most AI apps ask you to hand over your most sensitive data and trust them with it. Every prompt, file, and meeting reveals something about you, and a cloud agent with that reach is a remote company's window into your work.

June is built the other way around. The app and the agent run on your Mac. Notes, recordings, transcripts, files, sessions, and agent memory stay on your machine by default. When June needs model inference, the request goes through June API, an open source, TEE-attested service that keeps provider keys server-side and routes to private models with zero data retention by default. You do not have to take any of this on faith: the entire product is MIT licensed, and the exact code serving production is cryptographically verifiable.

What June does

• Chat. Ask questions, do research, brainstorm, and build plans without the conversation training someone else's model.
• Dictation. Hold a key, talk, release. June turns your voice into clean, polished writing and pastes it into whatever app you were using, with push-to-talk and hands-free modes and selectable writing styles.
• Meeting notes. June detects supported meetings and offers to take notes, without a bot joining the call. It records microphone or microphone plus system audio, orders the transcript into conversation turns, and generates editable notes. Saved audio is kept so failed steps can be retried without recording again.
• Agent. A local agent, built on the open source Hermes framework, that helps with files, research, drafts, and scheduled routines. Sessions are sandboxed by default and risky actions wait for your approval. Extend it with skills, toolsets, and MCP servers.
• Image generation. Create images from a prompt, through the same private routing as everything else.
• Your choice of models. Pick generation, transcription, and dictation models from the live catalog, each labeled with its privacy tier. Bring your own Venice API key if you prefer.

How June keeps it private

1. Local by default. App state, recordings, transcripts, and agent memory live on your machine. The agent runs locally inside a macOS write-jail unless you opt a session out.

2. Private models. Model calls default to private Venice models with zero data retention: nothing stored, no training. Anonymized third-party models are opt-in, and those providers may retain what they receive under their own policies.

3. Minimal retention. Open Software's services store account, login, and billing records. Prompts, audio, transcripts, and files are not among them.

4. Verifiable, not promised. June API runs in an Intel TDX confidential VM on Phala Cloud, and its trust chain has three public anchors:

   • Source: this repository. The production image records its source commit in the OCI org.opencontainers.image.revision label.
   • Image: build-june-api.yml publishes ghcr.io/open-software-network/june-api; deploys pin immutable per-commit tags recorded as signed deploy/<env>/<sha> git tags.
   • Attestation: the Phala Trust Center report proves that image is what actually runs inside the TEE.

   Every deployment serves a self-contained walkthrough at /verify. The chain proves the code running in the confidential VM, not what upstream model providers do with what they receive, which is why zero-retention routing is the default.

Download

June runs on macOS 14 or later, Apple Silicon and Intel. Releases are signed, notarized, and auto-updating, with stable and rc channels switchable in-app. It is free to start.

• Download for macOS
• All releases and changelog source

If you use Homebrew, this is the recommended way to install:

brew install --cask open-software-network/tap/june

Windows builds cover the app shell, sign-in, microphone recording, notes, and the bundled agent runtime, but not global dictation paste, system audio capture, or the macOS sandbox. macOS is the primary target.

Repository layout

This repo contains the full product: the desktop app and the service that powers its metered AI calls.

src/         React and TypeScript frontend
src-tauri/   Tauri v2 Rust desktop backend and native helpers
june-api/    June API: models, transcription, generation, and billing
docs/        Architecture notes, ADRs, subsystem guides, and runbooks
spec/        Enforceable coding rules
specs/       Feature specs, plans, and validation notes

The desktop app never holds provider or OS Accounts App API keys; those live only in June API. Start with docs/index.md for the full doc map, CONTEXT.md for the domain glossary, and AGENTS.md for the contributor guide.

Build from source

You need Node.js with pnpm 9 and a Rust toolchain.

git clone https://github.com/open-software-network/os-june
cd os-june
cp .env.example .env
cp june-api/.env.example june-api/.env
# Edit june-api/.env and set JUNE__UPSTREAMS__VENICE__API_KEY.
pnpm install
pnpm tauri:dev

The example env files default to open source local mode: no OS Accounts login, no billing, and a local June API authenticated by a shared bearer token. Provider keys belong only in june-api/.env, never in the root desktop .env. A Venice API key is enough for transcription, generation, and dictation cleanup.

See docs/development.md for the day-to-day development guide (ports, onboarding replay, local data, permissions, agent skills, and test commands) and docs/configuration.md for the full configuration reference, including exposing your own models and running against OS Accounts.

Contributing

June ships near-daily releases and development happens in the open.

pnpm check         # lint and format (Biome)
pnpm typecheck
pnpm test          # frontend (Vitest)
pnpm test:rust     # desktop Rust
pnpm test:june-api # June API

make verify mirrors CI. Start with CONTRIBUTING.md, then AGENTS.md for the full contributor guide; the enforceable UI rules live in spec/. Report bugs through GitHub issues, and report security vulnerabilities privately per SECURITY.md.

• Community: t.me/osjune
• Updates: @OpenSoftwareCo and the changelog

License

June is MIT licensed. See LICENSE. Bundled third-party runtime notices are tracked in THIRD_PARTY_NOTICES.md.