chore: establish phase 0 baseline

2026-07-18 18:20:34 -04:00
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+# Fixture policy
+
+## Allowed
+
+- Small, synthetic, deterministic files created specifically for tests.
+- Sanitized fragments whose provenance and redistribution permission are recorded.
+- Malformed, missing-field, duplicate, moved, unmounted, unusual-path, invalid-encoding,
+  oversized-boundary, symlink, traversal, and shell-metacharacter cases.
+- Temporary integration state created under a test-owned directory and removed afterward.
+
+## Forbidden
+
+- Live tokens, cookies, account identifiers, device identifiers, personal paths, save
+  files, complete personal libraries, crash dumps with private data, or proprietary
+  launcher databases copied wholesale.
+- Network access in unit or contract tests.
+- Fixtures whose expected result depends on the developer's username, UID, home path,
+  locale, clock, network, mount layout, or installed games.
+
+## Review and storage
+
+Every fixture directory contains a README stating its origin, license/permission,
+sanitization, parser behavior being tested, and whether it may be redistributed. Binary
+fixtures require a size justification and checksum. Secrets scanners and adversarial
+tests treat fixtures as hostile input, not trusted code or shell text.
+