Go 1.26.5 maps each test binary's stdout and stderr to the same product writer. Teach the captured executor to share one open file description for byte-equal output paths, then make directory test products emit that one ordered capture on coordinator stdout. Build captures and inherited-stdio routes remain unchanged.\n\nKeep the executor mechanism, package policy, native Cstage/WWstage proof, and normative contract together so every commit preserves the observable test-output behavior.
Separate import lookup from raw CLI target compatibility in both production drivers. Package scans and test-support edges now create directory nodes only, while unit composition emits only the owning package's sorted sources after direct export data. Document the Go 1.26.5 ownership evidence and retained single-file root boundary.
Make the schema-1 transcription mechanically consistent before the protocol freeze: restore compiler-protocol identity, use the typed native-contract record identity, distinguish encoding and path classes, and close the package artifact kinds. These corrections must land together because one exhaustive IDL cannot encode the prior conflicting rules.
Go compiles only _test.go files as tests; discovery now keys on the
_test.ww suffix alone. The line-leading-@test compatibility allowance
(noncanonical filenames admitted as test sources) is removed from both
driver stages and the coordinator. An @test declaration outside a
*_test.ww file is rejected loudly ("@test declaration outside
*_test.ww", wording byte-identical cs/ww) instead of silently running
under compose or silently dropping in a non-T build (#6). Tree audit
found zero real carriers; the two allowance fixtures flip canonical
(dep_test.ww, widget_test.ww). New pins: direnum attest-noncanon
reject row (both-stage stderr parity) and the coordinator
noncanonical_attest_rejected package row.
