# Data provenance — proofreader

Where the content of this skill package comes from, counted by
content items (tasks, competences, tools, evidence entries, curated
knowledge). Rendered live by Gitea:

```mermaid
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pie showData
    title Content sources — proofreader
    "ESCO (occupation & competences)" : 23
    "O*NET (tasks & tools)" : 58
    "Job boards (market evidence)" : 88
    "Anthropic official Claude skills" : 9
    "External AI skill packs (mapped)" : 194
```

| Source | Items | Share | Files |
|---|---|---|---|
| ESCO (occupation & competences) | 23 | 6.2 % | references/profile.md, references/skills.md |
| O*NET (tasks & tools) | 58 | 15.6 % | references/tasks.md, references/tools.md |
| Job boards (market evidence) | 88 | 23.7 % | references/market.md (full report) + "Market evidence" headline sections |
| Wikipedia & AI expert curation | 0 | 0.0 % | glossary, literature, usecases, intake, quality, evals/ |
| Anthropic official Claude skills | 9 | 2.4 % | references/ai-skills.md, section "anthropics/skills" (official Claude Code skills) |
| External AI skill packs (mapped) | 194 | 52.2 % | references/ai-skills.md (per-source attribution inside) |
| Stack Exchange practitioner Q&A (CC-BY-SA) | 0 | 0.0 % | references/practitioner-qa.md (per-entry attribution inside) |

Licensing: O*NET (USDOL/ETA, CC BY 4.0) · ESCO (© European Union) ·
job-ad evidence via official APIs (JSearch/Adzuna) · Wikipedia content
paraphrased with source URLs — never copied · external AI skills are
linked, not copied (Apache-2.0/MIT/source-available, see ai-skills.md).