config/loader/mod.nu had 5 `export use X *`. Each is now explicit.
Symbol counts per target:
core.nu 1
validator.nu 6
environment.nu 4
test.nu 2
dag.nu 1
Total: 14 symbols.
With loader/mod.nu now star-free, the orchestrator loader.nu (1-line
re-export) could be converted from `export use loader.nu *` to selective
in config/mod.nu. Tracked as follow-up — once loader/mod.nu and
accessor/mod.nu are both clean, config/mod.nu's 2 orchestrator exceptions
can be resolved.
Validation:
nu --ide-check 50 config/loader/mod.nu -> 0 errors
Refs: ADR-025, .coder/benchmarks/phase2-transitivity.md Layer 3
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