harper
reference corpus · status live · domain WRITE (Writing and copy) · lane A · refresh pinned · tags GLOBAL · GRAMMAR · RUST · STYLE-CHECKER · DICTIONARY · LINTER
What an agent uses it for
An agent building a fast local grammar/style checker in Rust queries this for its rule engine, lint rules and curated dictionary (no cloud, no LLM).
curl -fsSLO https://raw.githubusercontent.com/xerj-org/xerj/corpus-hub/tools/xerj-code/hub/harper.jsonxerj corpus add --from ./harper.jsonxerj corpus index harper then xerj code harper "your question"Needs the xerj CLI and a local node running; the copy prompt covers both, checks each step, and shows how to stop only the node you started. No shell: the MCP tool xerj_code_search with corpus: "harper", once the corpus is indexed on the node.
Sources and pins
| source | pin | licence | size | review note |
|---|---|---|---|---|
| harper | 6a0f42d1c174 | Apache-2.0 | 47.5 MB / 1,855 files | licence host-verified (ok-spdx): Apache-2.0 |
47.5 MB across 1,855 files. Added 2026-10-13.
Rights
Apache-2.0. Redistribution permitted with attribution per the licence review. The review block records a human opening each licence file at the pin. Detector output is a hint, never the verdict.
Retrieval spot-check (G7)
Not yet spot-checked. Queries are pre-registered in the registry before grading.