bootstrap.janet resolves jpm/cli.janet relative to cwd, so it must run
from /tmp/jpm rather than the repo root (fixes 'could not find file
jpm/cli.janet').
- .github/workflows/tests.yml: build Janet (cached) + jpm, init vendor/sci
submodule, run jpm test on every push and PR.
- README: explain the per-form eval router — interpreted (default) vs
compiled (:compile?), the always-interpret carve-out, and shared context.