Finish DS4 execution parity

scripts/execution_parity.py

@@ -10,10 +10,15 @@ import sys
 ROOT = pathlib.Path(__file__).resolve().parent.parent
 HARDWARE_TESTS = (
     "flash_resident_and_ssd_streaming_choose_the_same_tokens",
+    "resident_multi_session_switching_preserves_each_kv_frontier",
     "legacy_mtp_runs_a_target_owned_greedy_cycle",
     "dspark_runs_a_target_owned_greedy_cycle",
     "ssd_streaming_supports_legacy_mtp_and_dspark",
     "directional_steering_matches_the_ds4_token_oracle",
+    "resident_and_streamed_glm_match_the_short_code_fixture",
+    "streamed_glm_uses_ds4_indexed_prefill_for_long_prompts",
+    "glm_mtp_preserves_target_tokens_and_drafts",
+    "pro_resident_and_ssd_streaming_choose_the_same_tokens",
 )
 ENDPOINT_SCRIPTS = (
     "endpoint_parity.py",

scripts/import_hotlists.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+"""Regenerate the Rust expert hotlists from a DS4 source checkout."""
+
+import argparse
+import pathlib
+import re
+
+
+ARRAY = re.compile(
+    r"static const uint16_t ds4_default_streaming_hotlist_(\w+)\[\]\[2\] = \{(.*?)\n\};",
+    re.DOTALL,
+)
+PAIR = re.compile(r"\{(\d+),\s*(\d+)\}")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("source", type=pathlib.Path)
+    parser.add_argument("output", type=pathlib.Path)
+    args = parser.parse_args()
+    texts = [
+        (args.source / "ds4_streaming_hotlist.inc").read_text(),
+        (args.source / "ds4_streaming_hotlist_glm52.inc").read_text(),
+    ]
+    arrays = {
+        name: PAIR.findall(body)
+        for text in texts
+        for name, body in ARRAY.findall(text)
+    }
+    names = (("PRO", "pro"), ("FLASH", "flash"), ("GLM52", "glm52"))
+    lines = ["// Generated mechanically by scripts/import_hotlists.py.\n"]
+    for constant, source_name in names:
+        lines.append(f"pub(super) const {constant}: &[(u16, u16)] = &[\n")
+        lines.extend(f"    ({layer}, {expert}),\n" for layer, expert in arrays[source_name])
+        lines.append("];\n")
+    args.output.write_text("".join(lines))
+
+
+if __name__ == "__main__":
+    main()