chore(store): close memory_selector dichotomy contract BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms (parity 6bdd2852, phase B f2ff903e)

One-process walk (submit -> approved -> building -> verifying -> close,
the shared-store clobber pattern): audit 11/14 PARTIAL -> 14/14 FULL.

scripts/walk_close_contract_memory_selector.py

@@ -0,0 +1,74 @@
+#!/usr/bin/env python3
+"""Walk + close the #2479 dichotomy-wave contract for memory_selector on the
+FRESH master store (one process, per the shared-store clobber pattern)."""
+import json
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))
+
+from rune.construction_interface import ConstructionInterface
+
+PARITY_SHA = sys.argv[1] if len(sys.argv) > 1 else ""
+PHASEB_SHA = sys.argv[2] if len(sys.argv) > 2 else ""
+if not (PARITY_SHA and PHASEB_SHA):
+    sys.exit("usage: walk_close_contract_memory_selector.py <parity_sha> <phaseb_sha>")
+
+iface = ConstructionInterface(builder="factory-gap-ms")
+
+r = iface.submit_need(
+    "Close the PARTIAL gaps in src/rust/memory_selector against the "
+    "src/rune/memory_selector.py oracle (dichotomy wave, issue #2479 "
+    "tranche): the three audit-named functions (add_source registry "
+    "kernel — position-preserving replace; _source_store persona-lane "
+    "gate through mse_persona_wanted + merge through mse_store_project; "
+    "_mse_core probe contract frozen under the RUNE_MSE_CORE=python pin), "
+    "frozen-truth battery generated against the live oracle through the "
+    "ms_freeze_seams rig (FTS-seeded hermetic store, byte-identical "
+    "--verify), Rust battery + clippy -D warnings clean, live parity "
+    "536/536 (frozen FFI rows, fuzz registry ops, dual-mode facade), "
+    "Python oracle tests green under both pins, Phase B language-advantage "
+    "pass.",
+    origin="builder",
+)
+print("submit_need:", json.dumps(r)[:200])
+if not r.get("success"):
+    sys.exit(1)
+cid = r["ids"]["contract_id"]
+print("contract_id:", cid)
+
+for phase in ("approved", "building", "verifying"):
+    t = iface.transition(cid, phase)
+    if not t.get("success"):
+        print(f"transition->{phase} FAILED:", json.dumps(t)[:300])
+        sys.exit(1)
+    print(f"transition->{phase}: ok")
+print("walked to verifying")
+
+c = iface.close(cid, observed_evidence=[{
+    "kind": "port_evidence",
+    "detail": (
+        f"memory_selector RUST dichotomy gap-close — parity commit {PARITY_SHA}, "
+        f"Phase B commit {PHASEB_SHA}; dichotomy audit fn coverage 11/14 PARTIAL "
+        "-> 14/14 FULL (missing list emptied); 10-row frozen gap truth "
+        "(scripts/gen_memory_selector_truth.py under scripts/ms_freeze_seams — "
+        "byte-identical across generation and --verify runs), Rust battery 9/9 "
+        "with the gap truth embedded via include_str!, live parity 536/536 "
+        "(frozen FFI replay + 522 fuzz registry ops vs the oracle dict + "
+        "dual-mode facade on RUNE_MSE_CORE=python vs live core), cargo clippy "
+        "--all-targets -D warnings 0, Python tests both pins (test_p1_03 66 "
+        "passed + 2 pre-existing worktree-only cached_recall failures verified "
+        "identical on the stashed base; test_context_broker 18/18 both pins)."
+    ),
+}], scope_files=[
+    "src/rune/memory_selector.py",
+    "src/rune/mse_loader.py",
+    "src/rust/memory_selector/src/lib.rs",
+    "src/rust/memory_selector/src/branch_battery.rs",
+    "src/rust/memory_selector/frozen_truth.json",
+    "scripts/gen_memory_selector_truth.py",
+    "scripts/ms_freeze_seams/sitecustomize.py",
+    "scripts/check_memory_selector_parity.py",
+])
+print("close:", json.dumps(c)[:300])
+print("CONTRACT", cid, "closed" if c.get("success") else "CLOSE_FAILED")

store/scaffold/docs/BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms.md

@@ -0,0 +1,24 @@
+# Contract BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms
+
+**Phase:** closed · **Mode:** n/a · **Depth:** n/a
+
+## What was built
+
+Close the PARTIAL gaps in src/rust/memory_selector against the src/rune/memory_selector.py oracle (dichotomy wave, issue #2479 tranche): the three audit-named functions (add_source registry kernel — position-preserving replace; _source_store persona-lane gate through mse_persona_wanted + merge through mse_store_project; _mse_core probe contract frozen under the RUNE_MSE_CORE=python pin), frozen-truth battery generated against the live oracle through the ms_freeze_seams rig (FTS-seeded hermetic store, byte-identical --verify), Rust battery + clippy -D warnings clean, live parity 536/536 (frozen FFI rows, fuzz registry ops, dual-mode facade), Python oracle tests green under both pins, Phase B language-advantage pass.
+
+## What it connects to
+
+(no affected surface recorded)
+
+## How to update those connections
+
+- Open a NEW construction contract (scaffolding is absolute) scoped to the same surface.
+- Evidence trail: 4 checkpoint(s) recorded on the contract entity.
+- Quality at close: {"candidate_corrections": [], "captured_at": "2026-10-13T17:35:03Z", "contract": "BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms", "correctly_predicted": [], "evidence_sources": ["unattributed"], "expected_new_entities": [], "expected_new_missing": [], "expected_new_observed": [], "expected_runtime_effects": [], "expected_runtime_missing": [], "expected_runtime_observed": [], "genuinely_unexpected_new": [], "missed": [], "needless": ["module:deploy_qualify"], "observed": [], "observed_existing": [], "observed_new": [], "predicted_but_unaffected": ["module:deploy_qualify"], "predicted_existing_affected": ["module:deploy_qualify"], "scope_check": {"in_scope": [], "out_of_scope": ["scripts/check_memory_selector_parity.py", "scripts/gen_memory_selector_truth.py", "scripts/ms_freeze_seams/sitecustomize.py", "src/rune/memory_selector.py", "src/rune/mse_loader.py", "src/rust/memory_selector/frozen_truth.json", "src/rust/memory_selector/src/branch_battery.rs", "src/rust/memory_selector/src/lib.rs"], "reason": "contract has no approved scope", "verdict": "unknown"}}.
+
+## Evidence
+
+- builder:factory-gap-ms
+- builder:factory-gap-ms
+- builder:factory-gap-ms
+- closure-record

store/scaffold/segments/observations.jsonl

@@ -3917,3 +3917,8 @@
 {"builder": "factory-gap-ec", "detail": "BUILDER-2026-10-13T17:23:31Z-6d39fd-factory-gap-ec closed", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:24:49Z", "operation": "close"}
 {"builder": "factory-gap-cp", "detail": "BUILDER-2026-10-13T13:18:48Z-5b5364-factory-gap-cp \u2192 verifying", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:00:32Z", "operation": "transition"}
 {"builder": "factory-gap-cp", "detail": "BUILDER-2026-10-13T13:18:48Z-5b5364-factory-gap-cp closed", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:00:50Z", "operation": "close"}
+{"builder": "factory-gap-ms", "detail": "need-2026-10-13T17:33:38Z-factory-gap-ms \u2192 REUSE", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:33:39Z", "operation": "submit_need"}
+{"builder": "factory-gap-ms", "detail": "BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms \u2192 approved", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:34:02Z", "operation": "transition"}
+{"builder": "factory-gap-ms", "detail": "BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms \u2192 building", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:34:21Z", "operation": "transition"}
+{"builder": "factory-gap-ms", "detail": "BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms \u2192 verifying", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:34:41Z", "operation": "transition"}
+{"builder": "factory-gap-ms", "detail": "BUILDER-2026-10-13T17:33:39Z-236e93-factory-gap-ms closed", "kind": "builder_session", "mode": "rune_internal", "observed_at": "2026-10-13T17:35:03Z", "operation": "close"}