Higgs
Summary
Higgs is a productivity tool whose purpose, company, and capabilities remain entirely undocumented.
No description exists for what Higgs actually does or which productivity problems it targets. Pricing is listed as unknown and the project is closed source. Without any stated differentiator, benchmark, or concrete offering, the tool supplies no basis for comparison against alternatives. The biggest honest catch is the total absence of usable information, leaving reviewers unable to determine value or relevance.
Bottom line: *Skip until verifiable details on function and pricing appear.*
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Piping encrypted Proton Mail data to a cloud LLM defeats the purpose of choosing Proton in the first place — higgs closes that gap. It connects to your inbox via Proton Mail Bridge on localhost, sends mail through a local model (Gemma 4 via Ollama by default, or any OpenAI-compatible server you run yourself via PM_LLM_BACKEND=openai), and exposes a set of composable CLI commands: classify, search, archive, and Q&A. Output is always NDJSON, commands pipe into each other, and a –dry-run flag lets you inspect suggested labels and confidence scores before anything is applied.
The differentiating feature is the agent contract. Most CLI tools expose –help prose and unstructured stdout — which means an external agent has to guess flags, regex output, and branch on English error strings that change between versions. higgs instead ships a schema subcommand that returns a JSON manifest of every subcommand, its flags, its stdout format, and its typed exit codes. NDJSON streams end with a guaranteed {“type”:”summary”} terminator rather than a silence the agent waits out on a timeout. This makes higgs a first-class tool for agent pipelines rather than an afterthought.
Credentials stay entirely out of the model’s context window — Bridge credentials are stored in the OS keyring (macOS Keychain, Windows Credential Manager, libsecret) with an AES-256-GCM encrypted-file fallback. The project is Apache-2.0, carries zero telemetry (no analytics, no crash reporting, no update pings), and releases are cosign-signed with an SBOM so you can verify the binary you are running.
The scope is intentionally constrained: higgs executes single commands and emits structured output. It does not plan loops, select tools autonomously, or chain its own steps. Teams building agent workflows use higgs as a tool that an external agent calls — not as the agent itself. That boundary is a design choice, not an oversight, and it is documented explicitly in the agent contract design the project ships.