This branch uses mise for development and every CI host. Install mise (2026.10.19 or newer) before initialization.

mise trust
mise install --locked
./dev.sh node --version
./dev.sh npm ci
./dev.sh tsc
./dev.sh npm start test

./dev.sh opens a Bash shell with FJS prepended to the usual prompt after loading ~/.bashrc. Arguments run one command in the selected environment. On Windows PowerShell, use dev.ps1:

mise trust
mise install --locked
.\dev.ps1 node --version
.\dev.ps1 npm ci
.\dev.ps1 tsc
.\dev.ps1 npm start test

.\dev.ps1 without arguments opens an interactive shell using the current PowerShell executable (PowerShell 7 or Windows PowerShell 5.1). Its prompt starts with FJS, followed by the shell's usual prompt. Run exit to leave it. With arguments, it runs one command and returns that command's exit code. Both scripts are thin wrappers around mise exec -- <command>.

Manager installations do not replace native build prerequisites or platform SDKs.

mise.toml and mise.lock select the central supported versions. Commit the npm lock sidecars under .mise/locks/ with manifest/lock updates. Run mise lock then mise install --locked after changing pins; CI installs the committed lock.

SpiderMonkey uses the separate mise.spidermonkey.toml profile. On Linux ARM64:

mise -E spidermonkey lock http:spidermonkey --platform linux-arm64
mise -E spidermonkey install --locked http:spidermonkey
mise -E spidermonkey exec -- npm run sm t

The upstream checksum manifest is verified during optional runtime installation. Wasmer has no native Windows ARM64 release; the baseline intentionally excludes it there. CI exercises the WASM engines and SpiderMonkey on Linux ARM64.

A Claude Code cloud environment for this repository installs mise in its setup script, which runs once per new session from the directory above the checkout:

cd functionalscript && sh .claude/setup.sh

.claude/setup.sh installs the Linux x64 host prerequisites and mise, then runs mise install --locked and npm ci. The session hook in .claude/hooks/session-start.sh repeats the last two steps, which are no-ops once the setup script has run, and exports the selected tools to the session's shell.

./dev.sh npm run gen writes all generated source and workflows using Node. Tool lock updates are separate: update central pins and manifests together, refresh manager locks for every platform and commit any npm sidecars. Run scoped checks before pushing; CI validates all nine jobs. The generic fjs ci command requires the caller's committed manager manifest and lock.