# write-a-prd

Skill · `skill:write-a-prd`

Favz census, built 2026-10-02. Tool names and counts only. No repo names. HTML page: https://favz.co/tools/skill-write-a-prd.html

- Repos that have it now: 20
- Repos that ever had it: 28
- Still have it: 71%
- Share of census repos with any tool: 0.04%

## 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 | 0 |
| 2026-02 | 1 |
| 2026-03 | 10 |
| 2026-04 | 15 |
| 2026-05 | 15 |
| 2026-06 | 18 |
| 2026-07 | 20 |
| 2026-08 | 19 |
| 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 |
|---|---|---|---|
| [ubiquitous-language](https://favz.co/tools/skill-ubiquitous-language.md) | Skill | 9 | 661.3× |
| [design-an-interface](https://favz.co/tools/skill-design-an-interface.md) | Skill | 5 | 418.0× |
| [write-a-skill](https://favz.co/tools/skill-write-a-skill.md) | Skill | 5 | 247.4× |
| [improve-codebase-architecture](https://favz.co/tools/skill-improve-codebase-architecture.md) | Skill | 12 | 121.2× |
| [grill-me](https://favz.co/tools/skill-grill-me.md) | Skill | 13 | 80.0× |
| [tdd](https://favz.co/tools/skill-tdd.md) | Skill | 11 | 69.5× |
| [web-design-guidelines](https://favz.co/tools/skill-web-design-guidelines.md) | Skill | 5 | 35.4× |
| [skill-creator](https://favz.co/tools/skill-skill-creator.md) | Skill | 6 | 25.7× |
| [@upstash/context7-mcp](https://favz.co/tools/mcp-npm-upstash-context7-mcp.md) | MCP server (npm package) | 6 | 4.3× |