Higgs
Summary
Higgs is a productivity entry with no documented differentiator or pricing tier.
No description, use cases, or technical details appear in the directory record. The listing shows only that the tool is closed source and carries an unknown price. Without concrete information on its core function or cost structure, it is impossible to place it against alternatives in the productivity space. Directory visitors receive no basis for judging relevance to any workflow.
Bottom line: Skip until the listing supplies actual capabilities and pricing.
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Cloud AI tools and private email are architecturally incompatible — sending a subject line to an inference API dissolves the protection Proton’s end-to-end encryption provides. higgs closes that gap: a CLI that connects to Proton Mail Bridge over localhost, routes your mail to a locally hosted model (Gemma via Ollama by default, or any OpenAI-compatible server configured via PM_LLM_BACKEND), and exposes classify, search, archive, and Q&A commands. NDJSON pipes between commands, so `higgs search INBOX –before 2025-07-01 | higgs archive INBOX –uid -` is a single composable line, not a bespoke script.
The detail that sets higgs apart from generic local LLM wrappers is its explicit agent contract. Running `higgs schema classify` returns a JSON manifest of flags, stdout format, and exit codes — the schema is the prompt. Agents branch on `.error.kind` typed enum values instead of parsing English error strings. A guaranteed `{“type”:”summary”}` terminator ends every NDJSON stream, so agents don’t wait on timeouts. This is the difference between a CLI that a human happens to call and one designed from the start for agents running tasks without supervision.
The vendor states Bridge credentials are stored in the OS keyring — macOS Keychain, Windows Credential Manager, or libsecret — with an AES-256-GCM encrypted-file fallback, and that nothing sensitive enters a model’s context window. Releases are cosign-signed with an SBOM under Apache-2.0. There is no telemetry, no analytics, no update pings — the vendor states zero code paths exist that transmit data externally.
The constraints are architectural, not accidental. higgs requires Proton Mail Bridge, which means it is Proton Mail only — teams on Gmail or Fastmail have no path in. It is a CLI with no GUI layer and no hosted offering. The quality of classification and summarization is bounded by whatever model your hardware can run; a thread requiring long context will degrade on machines that cannot load a larger model. Teams that need a polished interface, multi-provider mail access, or cloud-scale model quality will abandon this for a hosted mail AI product.