# stravu/crystal

(Crystal is now Nimbalyst) Run multiple Codex and Claude Code AI sessions in parallel git worktrees. Test, compare approaches & manage AI-assisted development workflows in one desktop app.

Repository: https://github.com/stravu/crystal
Canonical: https://ross.abutalabs.com/products/stravu-crystal
Homepage: https://nimbalyst.com/
Language: TypeScript
License: MIT
License Family: permissive
Topics: ai, ai-coding, development-environment, vibe-coding, agentic-ai, anthropic, claude, claude-code, cursor, ide, llm-coding, codex, openai-codex
Last push: 2026-02-26T21:48:10+00:00

## Health v2 (maintenance only)
Score: 63/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 69, release rhythm 72, longevity 32
- inputs: {"age_days": 454, "days_push": 188, "days_rel": 188, "gap_med": 1, "n_releases_24m": 28}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3111, forks 196 (observed 2026-08-28T04:07:43.941438+00:00)

## What it is
Crystal (now renamed Nimbalyst) is an open-source Electron desktop app for running multiple Claude Code and Codex AI coding sessions in parallel, isolated via git worktrees. It adds visual editors (markdown, CSV, diagrams, mockups), session management with kanban boards, task tracking, and an extension system around AI-assisted development workflows.

## Use cases
- run multiple claude code sessions in parallel
- manage ai coding agents with git worktrees
- compare different ai approaches on the same task
- review and approve ai code edits visually
- organize ai agent sessions on a kanban board
- edit markdown and diagrams alongside ai agents
- track tasks that ai agents update automatically

## When to choose
- you juggle several Claude Code or Codex sessions at once and need isolation via git worktrees
- you want a visual workspace with editors, diffs, and task tracking around AI agents
- you prefer open-source, local-first files over terminal-only agent workflows

## When to avoid
- you only need a single AI coding session in a terminal
- you want a lightweight CLI tool rather than a full desktop app
- you need active updates - Crystal is deprecated in favor of Nimbalyst

## Facets
- artifact type: application
- maturity: maintenance
- function: developer-tools, agent-framework, gui, file-system, version-control, mcp, chat-interface
- domain: developer-tools, large-language-models
- platform: windows, cross-platform
- tags: git-worktrees, claude-code, codex, parallel-ai-sessions, ai-coding, kanban, markdown-editor, excalidraw, deprecated, nimbalyst, ai-agents, automation, macos, linux, electron, desktop

## Member repositories
- stravu/crystal (main) score 63

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:43.941438+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:26:43.633018+00:00, confidence not recorded.
  - readme: https://github.com/stravu/crystal (fetched 2026-08-28T04:07:43.941438+00:00, sha 0a380a83e2f6)
  - homepage: https://nimbalyst.com/ (fetched 2026-08-29T09:42:16.464260+00:00, sha d575e2eadc0a)
  - site_page: https://nimbalyst.com/features (fetched 2026-08-29T09:42:16.474769+00:00, sha a42389782426)
  - site_page: https://docs.nimbalyst.com (fetched 2026-08-29T09:42:16.479679+00:00, sha a227bef078ec)
  - site_page: https://nimbalyst.com/about (fetched 2026-08-29T09:42:16.482022+00:00, sha 33114f7b9ec9)
  - site_page: https://nimbalyst.com/features/extensions (fetched 2026-08-29T09:42:16.484494+00:00, sha 79296918df9a)
  - site_page: https://nimbalyst.com/features/session-management (fetched 2026-08-29T09:42:16.486811+00:00, sha a7b2186c5f14)
  - site_page: https://nimbalyst.com/features/task-management (fetched 2026-08-29T09:42:16.488621+00:00, sha ad85da717d21)
  - site_page: https://nimbalyst.com/pricing (fetched 2026-08-29T09:42:16.477589+00:00, sha e01801163b9a)
  - site_page: https://nimbalyst.com/blog/what-is-opencode (fetched 2026-08-29T09:42:16.490690+00:00, sha 845395b0de6e)
- Data as of 2026-08-30T08:39:29.467469+00:00.