Release Notes
Added
- Sema-native tracing API. New
otel/* builtins + with-span / with-session macros
let your own Sema code emit first-class spans — not just the auto-instrumented llm/* /
agent/* paths. with-span / otel/span wrap a block in a generic span;
otel/set-attribute(s), otel/set-status, and otel/event annotate the innermost active
span; the typed helpers otel/llm-span + otel/llm-usage, otel/tool-span, and
otel/retrieval-span render a user-built LLM/tool/retrieval step as an LLM/TOOL/RETRIEVER
span in Phoenix/Traceloop/Langfuse (via the SEMA_OTEL_COMPAT layer) with gen_ai.usage.*
accounting identical to the built-ins; with-session / otel/with-session groups
non-agent code into Langfuse Sessions/Users. Every form is a no-op when tracing is off and
never changes a program's return value. Docs: Tracing & Metrics → Adding your own
spans. Test: crates/sema/tests/otel_native_test.rs.
Install sema-lang 1.26.0
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/HelgeSverre/sema/releases/download/v1.26.0/sema-lang-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/HelgeSverre/sema/releases/download/v1.26.0/sema-lang-installer.ps1 | iex"
Install prebuilt binaries via Homebrew
brew install helgesverre/tap/sema-lang
Download sema-lang 1.26.0
