Aaron Jacobs
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atheriel.bsky.social
Aaron Jacobs
@atheriel.bsky.social
190 followers 79 following 31 posts
Software engineer building products at @posit.co. Occasional open-source #rstats work. Obscure Linux/ZFS stuff on the side.
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atheriel.bsky.social
More #rstats + OpenTelemetry news: @schloerke.com finally got all of the async issues in {ellmer} and {shiny} sorted out and tracing now works!

Here's what combining {shiny} + {ellmer} + {httr2} + {mirai} + {otel} looks like today.

(All credit for the screenshots to @schloerke.com.)
A screenshot showing the Logfire tracing UI with traces from a Shiny app using ellmer, httr2, and mirai on the left and some attributes on the right. A Shiny chatbot with a conversation about the weather in Atlanta, GA. It clearly serves as the source of the traces in the first image.
September 10, 2025 at 7:07 PM
atheriel.bsky.social
More #rstats OpenTelemetry tidbits: I've revived the PR that adds instrumentation to the {httr2} package.

Here is what is looks like to run {httr2}'s own test suite while looked up to Logfire:
A screenshot showing the Logfire tracing UI with traces from an HTTP client on the left and some attributes on the right. The trace names and attributes indicate that they are emitted by the R package "httr2".
September 8, 2025 at 5:44 PM
atheriel.bsky.social
Second pass: traces from a RAG in Langfuse constructed using both #rstats {ragnar} and {ellmer}. This shows a tool call out to a text embedding model as well as a general-purpose one, which is a bit more realistic (and interesting).
June 8, 2025 at 10:31 PM
atheriel.bsky.social
Currently wiring up a simple #rstats ellmer chatbot to send traces to Langfuse. These LLM observability platforms have some pretty slick UI:
A screenshot showing a trace in Langfuse. Visible are chat completions and their underlying HTTP requests, a tool call span, and a root span called "invoke_agent".
June 8, 2025 at 5:13 PM