# defense-in-depth

Skill · `skill:defense-in-depth`

Favz census, built 2026-10-08. Tool names and counts only. No repo names. HTML page: https://favz.co/tools/skill-defense-in-depth.html

- Repos that have it now: 21
- Repos that ever had it: 30
- Still have it: 70%
- 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 |
|---|---|
| 2025-10 | 1 |
| 2025-11 | 12 |
| 2025-12 | 12 |
| 2026-01 | 14 |
| 2026-02 | 16 |
| 2026-03 | 17 |
| 2026-04 | 17 |
| 2026-05 | 19 |
| 2026-06 | 20 |
| 2026-07 | 19 |
| 2026-08 | 21 |

## 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 |
|---|---|---|---|
| [testing-anti-patterns](https://favz.co/tools/skill-testing-anti-patterns.md) | Skill | 18 | 4401.3× |
| [root-cause-tracing](https://favz.co/tools/skill-root-cause-tracing.md) | Skill | 20 | 3704.8× |
| [finishing-a-development-branch](https://favz.co/tools/skill-finishing-a-development-branch.md) | Skill | 16 | 217.3× |
| [writing-skills](https://favz.co/tools/skill-writing-skills.md) | Skill | 16 | 211.2× |
| [receiving-code-review](https://favz.co/tools/skill-receiving-code-review.md) | Skill | 16 | 201.2× |
| [dispatching-parallel-agents](https://favz.co/tools/skill-dispatching-parallel-agents.md) | Skill | 15 | 200.6× |
| [executing-plans](https://favz.co/tools/skill-executing-plans.md) | Skill | 17 | 200.6× |
| [requesting-code-review](https://favz.co/tools/skill-requesting-code-review.md) | Skill | 16 | 196.4× |
| [verification-before-completion](https://favz.co/tools/skill-verification-before-completion.md) | Skill | 19 | 193.6× |
| [using-git-worktrees](https://favz.co/tools/skill-using-git-worktrees.md) | Skill | 15 | 192.2× |
| [subagent-driven-development](https://favz.co/tools/skill-subagent-driven-development.md) | Skill | 15 | 180.9× |
| [using-superpowers](https://favz.co/tools/skill-using-superpowers.md) | Skill | 13 | 169.4× |