Higgs
Summary
Higgs is a productivity entry with zero public information on company, function, or positioning.
No description, features, or benchmarks are recorded for this tool. Pricing tier is listed as unknown and the project is closed source. Without any account of what problem it solves or how it operates, no assessment of value or trade-offs is possible. The directory entry supplies only the category and name.
Bottom line: Ignore until verifiable details appear.
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Most AI email tools ask you to hand your inbox to a third-party API — defeating the point of choosing an end-to-end encrypted mail provider in the first place. higgs threads that needle: a local-first CLI that connects to Proton Mail via Proton Mail Bridge on 127.0.0.1, routes inference to a model you host (Gemma 4 via Ollama by default, or any OpenAI-compatible server via the PM_LLM_BACKEND=openai flag), and exposes classify, search, archive, and question-answering commands. The dry-run demo on the vendor site shows confidence-scored classification output arriving as NDJSON — one object per message, a guaranteed {“type”:”summary”} terminator — which pipes directly into subsequent commands without regex or timeout heuristics.
The differentiating design choice is the agent contract. Where most CLI tools leave an agent to parse –help prose and guess flag syntax each session, higgs exposes a higgs schema subcommand that returns a JSON manifest of every command: its flags, stdout format, and exit code enum. An agent loads the schema once. Errors branch on a typed .error.k field, not on English string matching between ‘auth error’ and ‘login incorrect’. The NDJSON stream has a defined terminator, so agents don’t wait on timeouts. The vendor describes this as the distinction between a tool built for agents versus a tool an agent is made to tolerate.
Credential handling follows the same principle: Bridge credentials live in the OS keyring — macOS Keychain, Windows Credential Manager, or libsecret — with an AES-256-GCM encrypted-file fallback. Nothing sensitive enters the model’s context window. The project is Apache-2.0, zero telemetry (no analytics, no crash reporting, no update pings), and releases are cosign-signed with an SBOM. Install is via Homebrew, go install, or signed release tarballs.
The constraint built into the architecture is also the constraint on the use case: higgs works with Proton Mail through Proton Mail Bridge, and that’s it. Teams running Gmail, Outlook, or multi-provider setups will find no integration path here. There is no API surface, no GUI, and no hosted option — which is the point, but also the ceiling.