A module is one piece of software and may still carry a daemon in one language,
tools in another and a package in a third. The first cut compiled every bundle
into the toolchain's single output directory, so two of them would have
overwritten each other and then been packed together — one artifact containing
both, published twice.
So output is a property of the artifact, not of the toolchain, and the toolchain
says how it is told where to write rather than where it writes. Under a directory
named for the build rather than beside the source, so a pack never sweeps up the
module's own working files.
A second toolchain is declared so the multi-language path is exercised rather
than asserted — a list with one entry cannot fail the way a list with four will.
And the fake compiler in the tests now writes where it was TOLD to. One that
always wrote to a fixed place would have passed whether or not each artifact got
its own directory, which is the whole of what these tests are for.
Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx
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