# Upstream provenance — typesafe-ai/skills

- Source: https://github.com/typesafe-ai/skills (MIT)
- Upstream commit SHA: 65a39f393687675ce170e6094757de20370365b9
- Upstream commit date: 2026-09-12T05:42:05Z
- Retrieved (UTC): 2026-09-19T10:38:45Z
- Method: git clone only; no upstream scripts executed; no `claude plugin` / `npx skills add` used
- Files preserved unchanged: upstream-SKILL.md, upstream-LICENSE, upstream-REPO-LICENSE
- SHA-256 (upstream-SKILL.md): 71ea90d7906c6554c4f4c460ef7361b2d26f59116ccdae986dc6d997b9389f52
- SHA-256 (upstream-LICENSE): 835f233f1d6ed84a9b9a351aba0689b47644a4137d6316911fc7957bde523b02
- Derivative: hardened skill `typesafe-secure` at SKILL.md (repo root) — locally owned derivative, modified from upstream; see the Attribution and Modifications section in SKILL.md