Independent register of AI agents & harnesses · no sponsored placementsEdition 2026-09 · 107 entries · evidence to 26 Sept 2026
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The Register / Orchestrators & meta-harnesses / Crystal

Register entry · Orchestrators & meta-harnesses · updated 26 Sept 2026

Crystal

Stravu · Orchestrators & meta-harnesses

Crystal was an MIT-licensed desktop app from Stravu for running multiple Claude Code and Codex sessions in parallel git worktrees and comparing their results. Its README now reads 'Crystal Is Now Nimbalyst' and marks it deprecated in February 2026. The successor, Nimbalyst, is an MIT-licensed visual workspace for Claude Code, Codex and OpenCode.

Renamed. Deprecated in February 2026 and replaced by Nimbalyst (nimbalyst.com, github.com/nimbalyst/nimbalyst). The final Crystal release v0.3.5 (2026-02-26) says it 'will not be updated in the future'.

What reviewers and users praise

  • Not enough evidence yet.

What they criticise

  • Not enough evidence yet.

Rating · evidence to 26 Sept 2026

Not enough evidence
  • Open source
Adoption32
Experts—
Crowd—
Experts vs the crowdneeds both scores
Experts—
Crowd—
PriceNot published
Use it viaDesktop app
Runs on—
LicenceMIT
UpdatedEvidence collected 26 Sept 2026

How the rating was worked out

Weights for Orchestrators & meta-harnesses: adoption 40%, experts 30%, crowd 30%. Fewer than two pillars have enough evidence. The method.

Adoption & momentumweight 40%32GitHub stars 3.1k → 45 · 0 releases in 90 days → 0
reach × 0.7 + momentum × 0.3
Expertsindependent reviews · weight 30%—No independent reviews found
Crowdcommunity sample · weight 30%—Only 0 community items sampled (6 needed)
Rating—Not rated: fewer than two pillars have enough evidence.

Trust & safety

Seven dimensions graded A–D from documented facts. Overall: not enough data.

n/e

Permission model

Not assessed; product discontinued.

n/e

Data access scope

Not assessed; product discontinued.

n/e

Data storage

Not assessed; product discontinued.

n/e

Data retention & training

Not assessed; product discontinued.

n/e

Incident history (24 months)

Not assessed; product discontinued.

n/e

Compliance

Not assessed; product discontinued.

A

Transparency

MIT licence with public release notes; repository not archived but no longer updated. source

The experts

0 named independent reviews found; dated reviews from the last 12 months are scored.

  • None found.

The crowd

0 coded posts.

    Recent changes

    Ranked alongside

    Other ranked entries in Orchestrators & meta-harnesses.

    Compare with the top two
    OrcaStably AI78
    SupersetSuperset Inc.70
    HerdrHerdr (Can Celik; YC F26)68
    T3 CodePing Labs (ping.gg / T3 Tools)67
    Vibe KanbanBloop (company shut down April 2026; now community maintained)60

    Sources

    Every figure above traces to one of these, observed up to 26 Sept 2026.

    1. README: Crystal Is Now Nimbalyst (Deprecated: February 2026)
    2. Nimbalyst repo (MIT; 1,777 stars; 51 releases in last 90 days; latest 2026-09-24)
    3. Ry Walker: Agentic Coding Mac Apps Compared (lists Crystal as deprecated in favour of Nimbalyst)