# clm_C4367F308E13

subject: Claude (/record/claude.md)  
predicate: feature_added  
value: Custom Skills  
valid_from: 2025-10-16  
valid_to: null  
published: 2025-10-16  
recorded: 2026-11-03  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-03  
checked: 2026-11-03 · its source page states the value and the date  

> Custom Skills : Upload your own Skills through the Skills API ( /v1/skills endpoints) to package domain expertise and organizational workflows

What https://platform.claude.com/docs/en/release-notes/overview#2025-10-16 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2025-10-16 (primary, Anthropic, published 2025-10-16)

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.