1.21.1

Release Notes

Bugfix. Found by a live stress test of the resilience features (Ollama-down →
Mistral fallback, caching, and budgets).

Fixed

• Cache hits double-charged cost and burned budget. A cached response (llm/with-cache) makes no provider call — no tokens are consumed and no money is spent — but its stored token usage was still run through track_usage, so llm/session-usage cost and llm/with-budget spend incremented on every cache hit (e.g. a repeated call reported 2× the cost, and cache hits could trip a budget). Cache hits now report zero usage, so cost/budget reflect actual spend. Verified live (cost unchanged across identical calls; a budget that allows one real call is not tripped by subsequent cache hits) and with a deterministic regression test. Provider fallback and budget enforcement were verified correct and unchanged.

Install sema-lang 1.21.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/HelgeSverre/sema/releases/download/v1.21.1/sema-lang-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/HelgeSverre/sema/releases/download/v1.21.1/sema-lang-installer.ps1 | iex"

Install prebuilt binaries via Homebrew

brew install helgesverre/tap/sema-lang

Download sema-lang 1.21.1

File	Platform	Checksum
sema-lang-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
sema-lang-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
sema-lang-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
sema-lang-aarch64-unknown-linux-gnu.tar.xz	ARM64 Linux	checksum
sema-lang-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum