# ddd

Skill · `skill:ddd`

Favz census, built 2026-10-05. Tool names and counts only. No repo names. HTML page: https://favz.co/tools/skill-ddd.html

- Repos that have it now: 20
- Repos that ever had it: 22
- Still have it: 91%
- Share of census repos with any tool: 0.02%

## Repos with it, by month

From commit dates in each repo's history. The last few days always look low, because repos found later fill them in.

| Month | Repos at month end |
|---|---|
| 2026-01 | 2 |
| 2026-02 | 5 |
| 2026-03 | 8 |
| 2026-04 | 11 |
| 2026-05 | 13 |
| 2026-07 | 16 |
| 2026-08 | 16 |
| 2026-09 | 20 |

## Goes with

Tools found in the same repos, ranked by lift: 3× means the two show up together three times as often as chance would give. Only pairs sharing 5 or more repos.

| Tool | Kind | Repos with both | Lift |
|---|---|---|---|
| [vertical-slice](https://favz.co/tools/skill-vertical-slice.md) | Skill | 6 | 824.5× |
| [solid](https://favz.co/tools/skill-solid.md) | Skill | 5 | 687.0× |
| [clean-architecture](https://favz.co/tools/skill-clean-architecture.md) | Skill | 8 | 577.1× |
| [clean-code](https://favz.co/tools/skill-clean-code.md) | Skill | 6 | 200.2× |
| [tdd](https://favz.co/tools/skill-tdd.md) | Skill | 5 | 28.9× |