BL8 (8255eb28) replaced buildrun's ToolchainGate, ToolchainSet.Put and ToolchainsBucket by PlacedNodes and ToolchainSet.Set for the builder
(§546, §604); no design line removes the checker's and the indexer's toolchain reads, so the three come back beside them, and
FollowAssignments feeds either.
Builds: design 47 G §492, §604, §546, §472, §574
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
The builder agrees a language's toolchain from the three build seats'
toolchain-reported, kept in its state toolchains-heard (read back at its start),
forgets a node's on the node-engine seat's running with no fingerprint (stopped)
and never on a placement, says toolchain-agreed with its digests list only when
the agreed version changes; builder_toolchains and builder_toolchains_drop;
the manifest's reads of the build modules' toolchains are gone. The gate over
the assignments is now PlacedNodes, which only counts nodes.
Builds: design 47 G §492, §604, §546, §472, §574
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ
buildrun leaves mesh-sdk for the builder's own Go module (ADR 0593 §1); the
checker, assigner, indexer and watchman require it by a replace to the sibling
directory. Issue 1930's bound was already on mesh-sdk's main and moves with it.
The builder copies the imports a build module answers to the done key and the
log's end entry, where the indexer keeps them (§2; D7).
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL
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