AsOf

Claude · featuremid-conversation system message

valid: Two independent sources agree, or a primary source states it: the record asserts this claim.asserted

What the statuses mean

Valid from
2026-09-22
Valid until
still holds
Published
2026-09-22
Recorded by AsOf
2026-11-07
Checked
2026-11-07 · its source page states the value and the date
Confidence
0.70

Sources

“Tools can now be defined inside a mid-conversation system message , in beta on the Claude API with the inline-tools-2026-09-15 beta header.”— what the page says, read 2026-11-07

Cite this claim

Each form names the value, its as-of date (2026-09-22), the day you read it (2026-11-08), the claim's stable URL and id and its primary source. The URL never changes: a superseded claim stays at the same address.

Plain text
AsOf. "Claude feature added: mid-conversation system message", as of 2026-09-22. Claim clm_E25E4DA5DE4D, https://asof.is/claim/clm_E25E4DA5DE4D, accessed 2026-11-08. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-09-22.
APA
AsOf. (2026). Claude feature added: mid-conversation system message (as of 2026-09-22) [Record clm_E25E4DA5DE4D]. Retrieved November 8, 2026, from https://asof.is/claim/clm_E25E4DA5DE4D (source: https://platform.claude.com/docs/en/release-notes/overview#2026-09-22)
BibTeX
@misc{asof_clm_E25E4DA5DE4D,
  author = {AsOf},
  title = {Claude feature added: mid-conversation system message},
  year = {2026},
  howpublished = {\url{https://asof.is/claim/clm_E25E4DA5DE4D}},
  note = {Claim clm\_E25E4DA5DE4D, as of 2026-09-22; source: https://platform.claude.com/docs/en/release-notes/overview\#2026-09-22},
  urldate = {2026-11-08}
}

On the record

/claim/clm_E25E4DA5DE4D.md/v1/claims/clm_E25E4DA5DE4Dsubmit a correction