Add producer-owned authenticated Go decision client and validated Forgejo profile

Assistant: codex
Assistant-Model: gpt-6.1-sol
Assistant-Session: 01a14bfc-9643-7872-aa12-98326dcf25e7

tools/export_decisionpep_adapter.py

@@ -0,0 +1,58 @@
+"""Export the Go 1.24 consumer slice from the producer's single source tree."""
+from pathlib import Path
+import argparse
+import hashlib
+import json
+
+ROOT = Path(__file__).resolve().parent.parent
+DESTINATION = ROOT / 'adapters/go/decisionpep'
+FILES = ['LICENSE', 'pkg/api/canonical.go', 'pkg/api/caring.go',
+         'pkg/api/resource_manifest.go', 'internal/sign/sign.go',
+         'pkg/decisionpep/client.go', 'pkg/decisionpep/client_test.go',
+         'testsupport/signfixture/sign.go']
+BASELINE = {
+    'pkg/api/canonical.go': 'a122a2e8cd524333b13c5939c7a3685e41efbe47497a64e0c7297c92b7f10d19',
+    'pkg/api/caring.go': '1907156f0f889e7b9e9c14970cf7a86a20d00478a496efaf92c7231f27fec5e3',
+    'pkg/api/resource_manifest.go': 'f0fa4080287d389ed48c2b1d6af96cc62e57ef72c902333f677f964420be133f',
+    'internal/sign/sign.go': '0df9515922e90775ebbfac798361dcafb20da8a4213796b44e246b8a92046cde',
+    'LICENSE': 'ff413f361a3b3bf44cf50f110fbcc4837064d57eefbcef89df2b43997c6262b6',
+}
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--check', action='store_true')
+    args = parser.parse_args()
+    output = {name: (ROOT / name).read_bytes() for name in FILES}
+    for name, digest in BASELINE.items():
+        if hashlib.sha256(output[name]).hexdigest() != digest:
+            raise SystemExit('Producer API/signature baseline changed; review the export contract before advancing it')
+    output['go.mod'] = b'module github.com/netkingdom/access-engine\n\ngo 1.24\n'
+    metadata = {
+        'upstream': 'github.com/netkingdom/access-engine',
+        'commit': 'd328a2601095686f74376d87791bff01e2a3a2a3',
+        'exact_unchanged_files': BASELINE,
+        'module': 'Standalone Go1.24 source slice with original module/import identity; no canonical/schema/signature modifications',
+        'new_code': ['pkg/decisionpep/client.go'],
+        'fixture_code': ['testsupport/signfixture/sign.go'],
+        'source_of_truth': 'repository root; generated with tools/export_decisionpep_adapter.py',
+        'exported_file_sha256': {name: hashlib.sha256(raw).hexdigest() for name, raw in sorted(output.items())},
+    }
+    output['producer-source.json'] = (json.dumps(metadata, indent=2) + '\n').encode()
+    actual = {str(item.relative_to(DESTINATION)) for item in DESTINATION.rglob('*') if item.is_file()}
+    if actual - set(output):
+        raise SystemExit('Unexpected files in the generated consumer slice')
+    if args.check:
+        drift = [name for name, raw in output.items() if not (DESTINATION / name).is_file() or (DESTINATION / name).read_bytes() != raw]
+        if drift:
+            raise SystemExit('Generated consumer slice differs: ' + ', '.join(drift))
+    else:
+        for name, raw in output.items():
+            path = DESTINATION / name
+            path.parent.mkdir(parents=True, exist_ok=True)
+            path.write_bytes(raw)
+    print(json.dumps({'status': 'verified' if args.check else 'exported', 'files': len(output)}))
+
+
+if __name__ == '__main__':
+    main()