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Up to three tools. The table shows the data as-is, without picking a “best”.
| Field | D2 | uv | act |
|---|---|---|---|
| Platforms | Universal | Universal | GitHub |
| Local support | Yes | Yes | Yes |
| Paid API | No | No | No |
| License | MPL-2.0 | MIT OR Apache-2.0 | MIT |
| Stars | 25761 | 91352 | 72485 |
| Last activity | October 11, 2026 | October 20, 2026 | — |
| Install complexity | Easy with a supported package manager; Homebrew must already be installed for this command. Official binaries, Windows, Linux, and source options are documented. | Easy on supported systems; Homebrew must already be installed for this command. Windows and standalone installation options are explained in the guide. | — |
| Category | Workflow, UI | Workflow, DevOps | Testing, Git, DevOps |
| Best use | For developers and small teams that want architecture and data-flow diagrams close to the repository and reviewable as text. Use it when relationships matter more than pixel-perfect placement; not for free-form marketing design or exact manual positioning. | For a Python developer or small team that wants a shared setup rather than relying on manually installed packages. Commit the dependency definition and lockfile, then sync the environment and run commands with uv. It does not isolate the operating system or untrusted code, or replace application compatibility tests. | Best for a developer or small team that repeatedly edits GitHub Actions workflows and wants to test a job before pushing. It provides a local run log, while a final GitHub check remains necessary. It is not suitable when exact hosted-runner parity is required. |