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# SQLC/Darkwing native environment

The immutable agent snapshot contains exact pinned base SQLC and Darkwing sources, Go1.26.8 and ordinary offline dependencies. v1/run-public-tests.sh repeats unchanged upstream selector tests (2 leaf cases) and Darkwing parse/DDL/DML/corpus tests (4083 leaf cases). Each paired repository passed in a fresh network=none container without mounts or evaluator injection. Tracked source manifests are preserved; source edits can be rebuilt and retested with the same commands.

The frozen native protocol checks quoted DuckDB COLLATE, source spans and typed diagnostics, SQLC DuckDB parsing/analysis through its existing constructor, and existing engines and DDL/DML. Matching original endpoint controls were reused after checking the immutable image, frozen fixture and gold production-block hashes, sealed report identities, raw command logs, actual fresh ELF identities and every retained compilation source byte. Both endpoints contain 9 native leaf cases: buggy passes 5 and fails 4; fixed passes all 9, yielding P2P 5 and F2P 4. The 8 root tests include two TestSelector children. SQLC fixed compilation consumes the actual same-world Darkwing replacement; the buggy constructor rejects DuckDB at runtime. Original full gold/test patches remain unchanged in instances; the adopted native contract excludes upstream test/testdata gold blocks and uses its own frozen fixtures, with production blocks unchanged.

v1/run-native-evaluation.sh accepts all_buggy/all_fixed and a fresh output path. It copies evaluator inputs into an offline container, materializes exact candidate sources and ordinary dependencies from the immutable snapshot, and invokes the unchanged approved native driver. Its inputs are external to the agent image. Original controls used disclosed evaluator/work mounts; current independent agent public tests use none. This wrapper derives its own source inventories for a new run; original controls retain their separately sealed provenance.

The Dockerfile restores a historical immutable snapshot and does not claim a dependency-registry rebuild.