{"id":18352025,"url":"https://github.com/posit-dev/kallichore-builds","last_synced_at":"2026-03-03T02:04:06.627Z","repository":{"id":259105603,"uuid":"874476665","full_name":"posit-dev/kallichore-builds","owner":"posit-dev","description":"Repository hosting binary releases of Kallichore, the Jupyter kernel supervisor for Positron.","archived":false,"fork":false,"pushed_at":"2025-04-08T21:45:32.000Z","size":8,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":7,"default_branch":"main","last_synced_at":"2025-04-10T00:46:36.442Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":null,"has_issues":false,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/posit-dev.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2024-10-17T22:37:35.000Z","updated_at":"2025-03-10T14:28:54.000Z","dependencies_parsed_at":"2025-04-10T00:37:43.203Z","dependency_job_id":null,"html_url":"https://github.com/posit-dev/kallichore-builds","commit_stats":null,"previous_names":["posit-dev/kallichore-builds"],"tags_count":24,"template":false,"template_full_name":null,"purl":"pkg:github/posit-dev/kallichore-builds","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/posit-dev%2Fkallichore-builds","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/posit-dev%2Fkallichore-builds/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/posit-dev%2Fkallichore-builds/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/posit-dev%2Fkallichore-builds/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/posit-dev","download_url":"https://codeload.github.com/posit-dev/kallichore-builds/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/posit-dev%2Fkallichore-builds/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":262351957,"owners_count":23297636,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-05T21:34:22.839Z","updated_at":"2025-09-23T04:17:28.712Z","avatar_url":"https://github.com/posit-dev.png","language":null,"readme":"# Kallichore Builds \u003cimg src=\"doc/Kallichore.webp\" align=\"right\" height=160 /\u003e\n\nThis repository hosts builds of Kallichore, Positron's Jupyter kernel supervisor.\n\n### What is Kallichore?\n\nKallichore is a high-performance, headless Jupyter kernel supervisor written in Rust. \n\nIt is used by [the Positron IDE](https://github.com/posit-dev/positron) to provide durable Jupyter kernel sessions, especially in [Posit Workbench](https://posit.co/products/enterprise/workbench/). It takes care of much of the minutiae of Jupyter kernel management (ZeroMQ, process interop, lifecycle supervision, etc.) and exposes a high-level API that Positron uses to control kernel sessions and to send and receive Jupyter messages.\n\nKallichore is a companion to Posit's [Amalthea and Ark](https://github.com/posit-dev/ark) projects. Like Amalthea, it is a Jupyter-adjacent project named after [one of Jupiter's moons](https://science.nasa.gov/jupiter/moons/kallichore/). Kallichore is also [one of the Muses](https://en.wikipedia.org/wiki/Callichore). \n\nHere's how Kallichore functions in the larger Positron ecosystem for e.g. an R session:\n\n```mermaid\ngraph TD\np[Positron] -- Positron API --\u003e r[R Language Pack]\nr -- Positron API --\u003e p\nr --\u003e kp[Kallichore Plugin] \nkp --\u003e r\nkp -- Kallichore API --\u003e k[Kallichore]\nk -- Kallichore API --\u003e kp\nk -- Jupyter over ZeroMQ --\u003e rk[R Kernel]\nrk -- Jupyter over ZeroMQ --\u003e k\nkp -- Jupyter over WebSocket --\u003e k\nrk -- LSP over TCP --\u003e r\n```\n\n### What are these builds?\n\nThese are binary release builds of `kcserver`, the Kallichore server, for all major operating systems.\n\n### What are they for?\n\nThese builds are bundled as part of Positron, and are made available here for easy access when building Positron. \n\n### Is Kallichore open source?\n\nNo. Its binaries are licensed for use in Positron, but its source code is not public.\n\n## Related Projects\n\n[Jupyter Server REST API](https://jupyter-server.readthedocs.io/en/latest/developers/rest-api.html)\n\n[Jupyter Kernel Gateway](https://jupyter-kernel-gateway.readthedocs.io/en/latest/)\n\n[ARK, an R kernel](https://github.com/posit-dev/ark)\n\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fposit-dev%2Fkallichore-builds","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fposit-dev%2Fkallichore-builds","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fposit-dev%2Fkallichore-builds/lists"}