diff --git a/tools/retrieval-eval/comparison-semseed-vs-bm25lex.json b/tools/retrieval-eval/comparison-semseed-vs-bm25lex.json
new file mode 100644
index 0000000..7f43706
--- /dev/null
+++ b/tools/retrieval-eval/comparison-semseed-vs-bm25lex.json
@@ -0,0 +1,147 @@
+{
+ "baseline": "semseed",
+ "candidate": "bm25lex",
+ "n_shared_queries": 38,
+ "fixed_by_candidate": [
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+  "q11"
+ ],
+ "broken_by_candidate": [],
+ "discordant": 2,
+ "net_queries": 2,
+ "mcnemar_exact_p": 0.5,
+ "min_detectable_swing_queries": 6,
+ "observed_run_to_run_drift_queries": 0,
+ "noise_floor_queries": 6,
+ "verdict": "no measurable difference",
+ "baseline_aggregate": {
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+  "n_scored": 35,
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+    "recall@10": 0.6153846153846154,
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+ "candidate_aggregate": {
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+  "mrr@10": 0.5021428571428571,
+  "nonsense_clean": "2/3",
+  "superseded_outranks": "2/3",
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+  "by_category": {
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+    "recall@10": 0.23310023310023312,
+    "mrr@10": 0.25
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+   "exact_rare": {
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+    "recall@5": 1.0,
+    "recall@10": 1.0,
+    "mrr@10": 1.0
+   },
+   "nonsense": {
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+    "clean": 2,
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+   "paraphrase": {
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+    "hit@5": 0.6153846153846154,
+    "recall@5": 0.6153846153846154,
+    "recall@10": 0.6153846153846154,
+    "mrr@10": 0.2846153846153846
+   },
+   "phrase": {
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+    "hit@5": 1.0,
+    "recall@5": 0.5494614512471656,
+    "recall@10": 0.6023242630385487,
+    "mrr@10": 0.8214285714285714
+   },
+   "superseded": {
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+    "hit@5": 0.3333333333333333,
+    "recall@5": 0.3333333333333333,
+    "recall@10": 0.6666666666666666,
+    "mrr@10": 0.20833333333333334,
+    "outranks": 2
+   }
+  }
+ },
+ "repeat_variance": {
+  "baseline": {
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+   "hit@5_min": 0.6857142857142857,
+   "hit@5_max": 0.6857142857142857,
+   "spread_queries": 0
+  },
+  "candidate": {
+   "runs": 2,
+   "hit@5_min": 0.7428571428571429,
+   "hit@5_max": 0.7428571428571429,
+   "spread_queries": 0
+  }
+ }
+}
\ No newline at end of file
diff --git a/tools/retrieval-eval/results-bm25lex-r2.json b/tools/retrieval-eval/results-bm25lex-r2.json
new file mode 100644
index 0000000..2a60b4b
--- /dev/null
+++ b/tools/retrieval-eval/results-bm25lex-r2.json
@@ -0,0 +1,959 @@
+{
+ "label": "bm25lex-r2",
+ "soul_binary": "/private/tmp/claude-501/-Users-timlingo/82369039-a20e-4b5a-8a5e-28234a57b996/scratchpad/soul-bm25lex",
+ "soul_md5": "dfbd0f8e3646212db5c60026f8ad906f",
+ "corpus": "/Users/timlingo/neuron-eval-corpora/snapshot-pre-repair-20260806-embedded.json",
+ "corpus_nodes": 78768,
+ "corpus_edges": 14214,
+ "gold_set": "/Users/timlingo/Development/neuron-technologies/_wt-eval/tools/retrieval-eval/gold_set.json",
+ "limit": 10,
+ "port": 7894,
+ "wall_clock_s": 50.1,
+ "child_pid": 90371,
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+ "aggregate": {
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+  "n_scored": 35,
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+  "mrr@10": 0.5021428571428571,
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+  "superseded_outranks": "2/3",
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+    "recall@10": 0.6153846153846154,
+    "mrr@10": 0.2846153846153846
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+    "mrr@10": 0.20833333333333334,
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+  }
+ },
+ "rows": [
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+   "category": "exact_rare",
+   "query": "unjailbreakable",
+   "returned": [
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+  {
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+    "project-engram",
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+   "mrr@10": 1.0
+  },
+  {
+   "id": "q03",
+   "category": "exact_rare",
+   "query": "cartabandonedevent",
+   "returned": [
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+   "mrr@10": 1.0
+  },
+  {
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+   "returned": [
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+   "mrr@10": 1.0
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+  {
+   "id": "q05",
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+   "returned": [
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+    "bl-c1765767-3e27-449a-8c94-10411d1eb7c0",
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+  },
+  {
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+   "mrr@10": 1.0
+  },
+  {
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+    "mem-a4a9dfc3-e40b-49b3-b1e1-060e8be2f482",
+    "project-Imprint__system_design__ADRs__tech_strategy__integration_patterns__governance_",
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+    "knw-7902acca-604e-409b-8faf-ad85424211d0",
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+   "mrr@10": 1.0
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+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
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+   "mrr@10": 1.0
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+    "project-harmonic-framework",
+    "bl-798d135f-3987-4ccd-8de6-70ca2f358337",
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+   "mrr@10": 0.25
+  },
+  {
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+   "category": "phrase",
+   "query": "Sarah Bishop",
+   "returned": [
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+    "kn-a99cefe3-5e83-4050-98d8-6c69f57c7c71",
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+   "mrr@10": 1.0
+  },
+  {
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+   "category": "phrase",
+   "query": "Directed Autonomous Runtime Modification",
+   "returned": [
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+   "mrr@10": 1.0
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+  {
+   "id": "q13",
+   "category": "phrase",
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+    "7774a16c-1027-4e3b-a21e-67f1f95a4acd",
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+   "query": "a soldier sidelined by illness who refused to quit",
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+   "query": "choosing an uncomfortable fact over a pleasant fiction",
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+   "query": "a tight payload beats a bloated one",
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+   "query": "if you are able and nobody is coming the job is yours",
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+   "id": "q19",
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+   "query": "learning is the wealth creditors cannot seize",
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+   "id": "q20",
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+   "query": "reliability proven by track record not assertion",
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+  {
+   "id": "q21",
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+   "query": "boundaries that enable instead of confine",
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+  {
+   "id": "q22",
+   "category": "paraphrase",
+   "query": "what shifts tells you where to cut a system apart",
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+  {
+   "id": "q23",
+   "category": "paraphrase",
+   "query": "a mind that compounds instead of resetting each day",
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+  {
+   "id": "q24",
+   "category": "paraphrase",
+   "query": "loved for the unedited self and not the polished exterior",
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+  },
+  {
+   "id": "q25",
+   "category": "paraphrase",
+   "query": "cheerfulness you arrive at instead of assuming",
+   "returned": [
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+    "kn-58874a74-b96f-4883-9e08-45707f4bd3ee",
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+  {
+   "id": "q26",
+   "category": "paraphrase",
+   "query": "a childhood offering no solid foundation to inherit",
+   "returned": [
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+    "kn-a99cefe3-5e83-4050-98d8-6c69f57c7c71",
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+    "tag-childhood"
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+  {
+   "id": "q27",
+   "category": "associative",
+   "query": "Grandma Lucas stroke February 2006 goodbye window",
+   "returned": [
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+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
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+    "kn-58874a74-b96f-4883-9e08-45707f4bd3ee",
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+  {
+   "id": "q28",
+   "category": "associative",
+   "query": "Marines hernia sepsis medical ward",
+   "returned": [
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+   "mrr@10": 0.25
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+  {
+   "id": "q29",
+   "category": "associative",
+   "query": "Sarah Bishop Dyer trailer performance",
+   "returned": [
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+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
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+    "766de879-f9d0-4a07-b6df-b43ee13763d8",
+    "015644f5-8194-4af0-800d-dd4a0cd71396",
+    "tag-trailer-park-paladins",
+    "kn-5de5a9ac-fd15-45ab-bf18-77566781cf40",
+    "project-trailer-park-paladins",
+    "kn-78db5396-3dbc-4481-bfc7-e4e1422feb1c"
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+   "mrr@10": 0.5
+  },
+  {
+   "id": "q30",
+   "category": "associative",
+   "query": "Swarm Architecture containment lateral worker",
+   "returned": [
+    "bl-0fac287f-f4c0-4f15-bc4d-ff7f8a7af3ae",
+    "bl-9bde67c1-f0ba-4c3a-8fe5-de0deee0ce43",
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+  },
+  {
+   "id": "q31",
+   "category": "associative",
+   "query": "hope won inside the narrative preface",
+   "returned": [
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+    "knw-e94982a2-358d-4f2f-af31-8ee0fcec07c6",
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+   "precision@5": 0.2,
+   "mrr@10": 0.25
+  },
+  {
+   "id": "q32",
+   "category": "associative",
+   "query": "man of the house six years old expectation",
+   "returned": [
+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
+    "knw-729fc901-8335-44c4-9f3a-b150b4aa0915",
+    "knw-d357b6bb-ad8a-4791-b516-426aea45fa5b",
+    "knw-528dbc37-eabc-4b75-a7a5-65bf38d6018a",
+    "knw-35940684-abc4-42f0-b942-818f66b1f69a",
+    "knw-473f3f24-20f6-4f39-8589-3709538eb6ac",
+    "?Z?<S???K ?",
+    "knw-7902acca-604e-409b-8faf-ad85424211d0",
+    "'?T?a\"B~-?8",
+    "kn-6061318f-046b-4935-907d-8eafdce14930"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1414.1,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 0.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.0
+  },
+  {
+   "id": "q33",
+   "category": "nonsense",
+   "query": "zqxjvw plimforth grebulon",
+   "returned": [],
+   "n_returned": 0,
+   "latency_ms": 703.0,
+   "error": null,
+   "clean": true,
+   "false_positives": 0
+  },
+  {
+   "id": "q34",
+   "category": "nonsense",
+   "query": "flarnbistle quommetry",
+   "returned": [],
+   "n_returned": 0,
+   "latency_ms": 492.9,
+   "error": null,
+   "clean": true,
+   "false_positives": 0
+  },
+  {
+   "id": "q35",
+   "category": "nonsense",
+   "query": "xxqzzt vurblenacht throom",
+   "returned": [
+    "bl-4476e856-c567-4b49-8ff7-d7dca3e5715e",
+    "?V?",
+    "knw-6b48dce2-f21c-452a-9db5-4e6aa61c87ca",
+    "knw-920c891f-bb8c-48c4-9afc-018ef12dcdc4",
+    "?m?\\}Q??6??",
+    "8cbb60c5-4999-4ec1-8682-2592aedc4249",
+    "kn-66a21179-2adc-4b19-a109-880cf4674d7d",
+    "?m?\\}Q??6??",
+    "knw-723551f5-1950-42a3-8b89-b6a06913cef0",
+    "kn-333542cb-6dab-4662-9725-bf7440d28bf7"
+   ],
+   "n_returned": 10,
+   "latency_ms": 728.4,
+   "error": null,
+   "clean": false,
+   "false_positives": 10
+  },
+  {
+   "id": "q36",
+   "category": "superseded",
+   "query": "is the self-improvement architecture called DARMA or DHARMA",
+   "returned": [
+    "mem-f3b37427-b7d1-4f7e-b32c-0241a20ce8da",
+    "mem-80d7416b-20e9-48a0-b176-b215527e2f56",
+    "tag-__darma____cgi____patents____self-improvement____character-preservation____autonomous____architecture__",
+    "kn-b7e98d63-8b83-4911-b4d0-990602a7f575",
+    "tag-__darma____cgi____patents____self-improvement____character-preservation____autonomous____kotlin____architecture__",
+    "knw-e047bb42-dc5b-4383-9e88-e508dc03abe3",
+    "mem-e6327f52-2bda-4ce7-9471-2fffd1e172de",
+    "bl-5b17bd3b-0c41-46cb-a710-6fa4429692ff",
+    "mem-82b93b21-a865-410f-9ec1-fc54121d9bb5",
+    "bl-145a0985-2382-400f-a7c5-c335c5e30a72"
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+   "recall@10": 1.0,
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+   "mrr@10": 0.5,
+   "outranks": true,
+   "rank_correct": 2,
+   "rank_stale": 8
+  },
+  {
+   "id": "q37",
+   "category": "superseded",
+   "query": "how many provisional patents does Will actually have",
+   "returned": [
+    "mem-6f0b2b45-90c1-4356-ac01-3daac05b09c8",
+    "12082f7e-e320-438b-bd65-083d8259748f",
+    "015644f5-8194-4af0-800d-dd4a0cd71396",
+    "13705072-4515-4124-963d-083af490494f",
+    "527ecb25-2587-47eb-8269-73be2431abd4",
+    "6de314bf-5c4c-4cfc-871f-fa2e422d45e6",
+    "a1000001-0000-0000-0000-000000000002",
+    "3cf706a1-3825-45d8-b0a9-06cae6cdf5b8",
+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
+    "7ac62daa-2eac-4c7a-a97e-e4203fc1b57b"
+   ],
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+   "latency_ms": 1654.7,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 1.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.125,
+   "outranks": true,
+   "rank_correct": 8,
+   "rank_stale": null
+  },
+  {
+   "id": "q38",
+   "category": "superseded",
+   "query": "is MCP still the live integration layer",
+   "returned": [
+    "5fcba804-eb5b-48ec-82da-146b1c6bb50d",
+    "bl-7328cbe3-0200-43c2-88e7-0a164e15fca4",
+    "bl-c8c19362-430b-4817-9cf4-9e85e0099c64",
+    "bl-c5c6571e-118f-47c7-8cbb-3ed0ebf64a51",
+    "mem-101e81b4-8097-4749-8d8d-7bb66de34517",
+    "ctx-3a55",
+    "86228228-7adf-41fb-b4c4-9ceea87953ae",
+    "4509ed62-9fb2-48b8-9038-ac569fca9604",
+    "bl-4f7b651b-6b33-449c-8a3b-cfce12ce984b",
+    "mem-3a2cf162-d93b-4f29-86f2-5066fb7fe1f5"
+   ],
+   "n_returned": 10,
+   "latency_ms": 995.5,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 0.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.0,
+   "outranks": false,
+   "rank_correct": null,
+   "rank_stale": 5
+  }
+ ]
+}
\ No newline at end of file
diff --git a/tools/retrieval-eval/results-bm25lex.json b/tools/retrieval-eval/results-bm25lex.json
new file mode 100644
index 0000000..21b0487
--- /dev/null
+++ b/tools/retrieval-eval/results-bm25lex.json
@@ -0,0 +1,959 @@
+{
+ "label": "bm25lex",
+ "soul_binary": "/private/tmp/claude-501/-Users-timlingo/82369039-a20e-4b5a-8a5e-28234a57b996/scratchpad/soul-bm25lex",
+ "soul_md5": "dfbd0f8e3646212db5c60026f8ad906f",
+ "corpus": "/Users/timlingo/neuron-eval-corpora/snapshot-pre-repair-20260806-embedded.json",
+ "corpus_nodes": 78768,
+ "corpus_edges": 14214,
+ "gold_set": "/Users/timlingo/Development/neuron-technologies/_wt-eval/tools/retrieval-eval/gold_set.json",
+ "limit": 10,
+ "port": 7893,
+ "wall_clock_s": 50.4,
+ "child_pid": 90325,
+ "child_confirmed_dead": true,
+ "aggregate": {
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+  "mrr@10": 0.5021428571428571,
+  "nonsense_clean": "2/3",
+  "superseded_outranks": "2/3",
+  "latency_ms_p50": 1184.4,
+  "latency_ms_p95": 1620.0,
+  "latency_ms_max": 1655.4,
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+  "by_category": {
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+    "hit@5": 0.6666666666666666,
+    "recall@5": 0.08857808857808858,
+    "recall@10": 0.23310023310023312,
+    "mrr@10": 0.25
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+   "exact_rare": {
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+    "hit@5": 1.0,
+    "recall@5": 1.0,
+    "recall@10": 1.0,
+    "mrr@10": 1.0
+   },
+   "nonsense": {
+    "n": 3,
+    "clean": 2,
+    "avg_false_positives": 3.3333333333333335
+   },
+   "paraphrase": {
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+    "hit@5": 0.6153846153846154,
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+   "phrase": {
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+    "hit@5": 1.0,
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+   "superseded": {
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+    "mrr@10": 0.20833333333333334,
+    "outranks": 2
+   }
+  }
+ },
+ "rows": [
+  {
+   "id": "q01",
+   "category": "exact_rare",
+   "query": "unjailbreakable",
+   "returned": [
+    "mem-7f61beb4-271c-4feb-9f6e-1c9c837a6226"
+   ],
+   "n_returned": 1,
+   "latency_ms": 287.7,
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+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q02",
+   "category": "exact_rare",
+   "query": "engram-migrate",
+   "returned": [
+    "mem-6fdf6545-5e1a-43a9-8bdc-d2cd248146a5",
+    "bl-ba764d70-e9d7-4f62-848f-719cb665f45e",
+    "mem-22fe5ec8-ae0d-4583-a05c-d1ef50353257",
+    "bl-b28d7256-6f74-4567-bd90-40d0ef2a6d78",
+    "project-engram",
+    "ctx-45bc",
+    "project-engram-lang",
+    "ctx-175f",
+    "mem-60778715-758c-4677-933d-fc39b8f94152",
+    "ctx-74ed"
+   ],
+   "n_returned": 10,
+   "latency_ms": 316.5,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q03",
+   "category": "exact_rare",
+   "query": "cartabandonedevent",
+   "returned": [
+    "mem-1ba7c67d-85b9-4c2e-9fe2-39f8b0477091"
+   ],
+   "n_returned": 1,
+   "latency_ms": 283.5,
+   "error": null,
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+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q04",
+   "category": "exact_rare",
+   "query": "pre-apprenticeship",
+   "returned": [
+    "mem-89c02aae-d3ca-43f9-9e5d-eb369896276c"
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+   "n_returned": 1,
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+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q05",
+   "category": "exact_rare",
+   "query": "inferencenodemanager",
+   "returned": [
+    "mem-73969486-143f-4431-b5e6-6845d1cc9848",
+    "bl-c1765767-3e27-449a-8c94-10411d1eb7c0",
+    "project-Add_inference_url_config_to_Neuron_MCP__Route_summarization_gen_tasks_to_Pantheon__keep_frontier_for_complex_reasoning_"
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+   "n_returned": 3,
+   "latency_ms": 304.2,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q06",
+   "category": "exact_rare",
+   "query": "clear-eyed",
+   "returned": [
+    "knw-c72597c5-c23d-4c08-8e9e-996dadf26a99"
+   ],
+   "n_returned": 1,
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+   "precision@5": 0.2,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q07",
+   "category": "phrase",
+   "query": "patterns not returns",
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+    "mem-a4a9dfc3-e40b-49b3-b1e1-060e8be2f482",
+    "project-Imprint__system_design__ADRs__tech_strategy__integration_patterns__governance_",
+    "project-Imprint__analysis_patterns__data_storytelling__SQL__dashboards__insight_framing_",
+    "bl-79028eed-c330-4724-9402-734062d13503",
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+    "bl-1d32bd54-cf17-4a1f-b235-982d09a36f04",
+    "bl-b8af6601-a8cb-41b5-aef5-ab8a57432dd5"
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+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 0.5
+  },
+  {
+   "id": "q08",
+   "category": "phrase",
+   "query": "thirty moves",
+   "returned": [
+    "kn-6061318f-046b-4935-907d-8eafdce14930",
+    "knw-7902acca-604e-409b-8faf-ad85424211d0",
+    "knw-d357b6bb-ad8a-4791-b516-426aea45fa5b",
+    "kn-f230b362-b201-4402-9833-4160c89ab3d4",
+    "knw-0087493b-25cd-45b0-bf46-c078c5b49718",
+    "knw-f671966c-3387-4848-abca-b5deec122e00",
+    "knw-ed33e669-0790-44cb-a036-958d605c6fea",
+    "knw-4aebd815-4eaf-49d7-954b-03595f3d48be",
+    "kn-db9f141b-dbe3-4037-92e0-4bb9be0e5e6e",
+    "knw-e94982a2-358d-4f2f-af31-8ee0fcec07c6"
+   ],
+   "n_returned": 10,
+   "latency_ms": 516.0,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 0.1875,
+   "recall@10": 0.375,
+   "precision@5": 0.6,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q09",
+   "category": "phrase",
+   "query": "Grandma Lucas",
+   "returned": [
+    "kn-a99cefe3-5e83-4050-98d8-6c69f57c7c71",
+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
+    "kn-db9f141b-dbe3-4037-92e0-4bb9be0e5e6e",
+    "kn-6061318f-046b-4935-907d-8eafdce14930",
+    "766de879-f9d0-4a07-b6df-b43ee13763d8",
+    "kn-0bb4f021-56de-4947-a35b-a37209e7ba21",
+    "bl-33ecccc2-e37f-43db-91b3-c2a86f08aaac",
+    "kn-58874a74-b96f-4883-9e08-45707f4bd3ee",
+    "art-0f0277a1-4a8e-4645-95dd-fa379976f31c",
+    "kn-f230b362-b201-4402-9833-4160c89ab3d4"
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+   "latency_ms": 520.9,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 0.3333333333333333,
+   "recall@10": 0.4444444444444444,
+   "precision@5": 0.6,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q10",
+   "category": "phrase",
+   "query": "Directed Harmonic",
+   "returned": [
+    "bl-dcee1887-34c4-4ffa-9119-1e291685ba08",
+    "project-harmonic-framework",
+    "bl-798d135f-3987-4ccd-8de6-70ca2f358337",
+    "mem-7eeacad7-d7c2-4c2b-8348-19a59aa6dbaf",
+    "project-harmonic-framework_com",
+    "bl-680b24a9-edc3-4a9d-847a-bff0b46b568c",
+    "tag-harmonic-design",
+    "bl-92acd4eb-0452-4e8e-9f54-f8cd35170d76",
+    "tag-harmonic-framework",
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+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 0.1111111111111111,
+   "recall@10": 0.1111111111111111,
+   "precision@5": 0.2,
+   "mrr@10": 0.25
+  },
+  {
+   "id": "q11",
+   "category": "phrase",
+   "query": "Sarah Bishop",
+   "returned": [
+    "kn-db9f141b-dbe3-4037-92e0-4bb9be0e5e6e",
+    "kn-a99cefe3-5e83-4050-98d8-6c69f57c7c71",
+    "766de879-f9d0-4a07-b6df-b43ee13763d8",
+    "015644f5-8194-4af0-800d-dd4a0cd71396",
+    "tag-sarah",
+    "kn-58874a74-b96f-4883-9e08-45707f4bd3ee",
+    "mem-1f32f73a-952c-41bc-96dc-8b8b70d8a7c1",
+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
+    "mem-a6cb3b8d-d89c-46fc-931d-e90c560783b0",
+    "kn-6061318f-046b-4935-907d-8eafdce14930"
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+   "latency_ms": 509.2,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.4,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q12",
+   "category": "phrase",
+   "query": "Directed Autonomous Runtime Modification",
+   "returned": [
+    "mem-e6327f52-2bda-4ce7-9471-2fffd1e172de",
+    "bl-31abf75b-998f-4a4f-a6dd-8204119e0451",
+    "mem-82b93b21-a865-410f-9ec1-fc54121d9bb5",
+    "bl-6f99e111-7055-4635-9831-a489747ce418",
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+    "bl-5b17bd3b-0c41-46cb-a710-6fa4429692ff",
+    "bl-967536a0-d49d-44fb-8cfb-b31b40bcbfae",
+    "bl-8b58d9bc-352b-4842-a7f8-a6254b5d1e25",
+    "2c56a7a9-5323-4ce4-ba09-35836ba15d54",
+    "bl-39cec462-c80c-4970-a3aa-91fe83053bde"
+   ],
+   "n_returned": 10,
+   "latency_ms": 872.7,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 0.21428571428571427,
+   "recall@10": 0.2857142857142857,
+   "precision@5": 0.6,
+   "mrr@10": 1.0
+  },
+  {
+   "id": "q13",
+   "category": "phrase",
+   "query": "zero-knowledge encrypted backup",
+   "returned": [
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+   "query": "learning is the wealth creditors cannot seize",
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+   "query": "reliability proven by track record not assertion",
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+   "query": "boundaries that enable instead of confine",
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+  {
+   "id": "q22",
+   "category": "paraphrase",
+   "query": "what shifts tells you where to cut a system apart",
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+  {
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+   "query": "a mind that compounds instead of resetting each day",
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+  {
+   "id": "q24",
+   "category": "paraphrase",
+   "query": "loved for the unedited self and not the polished exterior",
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+  {
+   "id": "q25",
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+   "query": "cheerfulness you arrive at instead of assuming",
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+  {
+   "id": "q26",
+   "category": "paraphrase",
+   "query": "a childhood offering no solid foundation to inherit",
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+  {
+   "id": "q27",
+   "category": "associative",
+   "query": "Grandma Lucas stroke February 2006 goodbye window",
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+  {
+   "id": "q28",
+   "category": "associative",
+   "query": "Marines hernia sepsis medical ward",
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+   "mrr@10": 0.25
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+  {
+   "id": "q29",
+   "category": "associative",
+   "query": "Sarah Bishop Dyer trailer performance",
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+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
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+    "tag-trailer-park-paladins",
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+    "project-trailer-park-paladins",
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+  },
+  {
+   "id": "q30",
+   "category": "associative",
+   "query": "Swarm Architecture containment lateral worker",
+   "returned": [
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+    "bl-9bde67c1-f0ba-4c3a-8fe5-de0deee0ce43",
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+    "kn-a5b3d0ac-f6a1-49a4-aebb-b8b4cd67fe83",
+    "kn-b36902cc-0b05-44ba-9aa7-800e5dea9ca9",
+    "bl-bea7473c-c687-414c-9c0b-00c509a616c1",
+    "bl-fc6fcb0b-9e4b-40bf-8e88-dbfe4e27c31a",
+    "kn-6f248a50-355b-47bb-aec8-e0e646a9b077",
+    "kn-6061318f-046b-4935-907d-8eafdce14930",
+    "mem-ab34c2f7-3243-424b-affa-25555f6cf9cc"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1185.7,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 0.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.0
+  },
+  {
+   "id": "q31",
+   "category": "associative",
+   "query": "hope won inside the narrative preface",
+   "returned": [
+    "kn-e0423482-cfa5-4796-8689-8495c93b66bc",
+    "knw-e94982a2-358d-4f2f-af31-8ee0fcec07c6",
+    "bl-2b00aeb0-c0fa-4a9f-8f30-4207e98b3d52",
+    "kn-58874a74-b96f-4883-9e08-45707f4bd3ee",
+    "kn-5b606390-a52d-4ca2-8e0e-eba141d13440",
+    "knw-4aebd815-4eaf-49d7-954b-03595f3d48be",
+    "knw-723551f5-1950-42a3-8b89-b6a06913cef0",
+    "tag-hope",
+    "knw-d357b6bb-ad8a-4791-b516-426aea45fa5b",
+    "kn-db9f141b-dbe3-4037-92e0-4bb9be0e5e6e"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1199.5,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 0.09090909090909091,
+   "recall@10": 0.18181818181818182,
+   "precision@5": 0.2,
+   "mrr@10": 0.25
+  },
+  {
+   "id": "q32",
+   "category": "associative",
+   "query": "man of the house six years old expectation",
+   "returned": [
+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
+    "knw-729fc901-8335-44c4-9f3a-b150b4aa0915",
+    "knw-d357b6bb-ad8a-4791-b516-426aea45fa5b",
+    "knw-528dbc37-eabc-4b75-a7a5-65bf38d6018a",
+    "knw-35940684-abc4-42f0-b942-818f66b1f69a",
+    "knw-473f3f24-20f6-4f39-8589-3709538eb6ac",
+    "?Z?<S???K ?",
+    "knw-7902acca-604e-409b-8faf-ad85424211d0",
+    "'?T?a\"B~-?8",
+    "kn-6061318f-046b-4935-907d-8eafdce14930"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1422.0,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 0.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.0
+  },
+  {
+   "id": "q33",
+   "category": "nonsense",
+   "query": "zqxjvw plimforth grebulon",
+   "returned": [],
+   "n_returned": 0,
+   "latency_ms": 703.8,
+   "error": null,
+   "clean": true,
+   "false_positives": 0
+  },
+  {
+   "id": "q34",
+   "category": "nonsense",
+   "query": "flarnbistle quommetry",
+   "returned": [],
+   "n_returned": 0,
+   "latency_ms": 488.0,
+   "error": null,
+   "clean": true,
+   "false_positives": 0
+  },
+  {
+   "id": "q35",
+   "category": "nonsense",
+   "query": "xxqzzt vurblenacht throom",
+   "returned": [
+    "bl-4476e856-c567-4b49-8ff7-d7dca3e5715e",
+    "?V?",
+    "knw-6b48dce2-f21c-452a-9db5-4e6aa61c87ca",
+    "knw-920c891f-bb8c-48c4-9afc-018ef12dcdc4",
+    "?m?\\}Q??6??",
+    "8cbb60c5-4999-4ec1-8682-2592aedc4249",
+    "kn-66a21179-2adc-4b19-a109-880cf4674d7d",
+    "?m?\\}Q??6??",
+    "knw-723551f5-1950-42a3-8b89-b6a06913cef0",
+    "kn-333542cb-6dab-4662-9725-bf7440d28bf7"
+   ],
+   "n_returned": 10,
+   "latency_ms": 720.7,
+   "error": null,
+   "clean": false,
+   "false_positives": 10
+  },
+  {
+   "id": "q36",
+   "category": "superseded",
+   "query": "is the self-improvement architecture called DARMA or DHARMA",
+   "returned": [
+    "mem-f3b37427-b7d1-4f7e-b32c-0241a20ce8da",
+    "mem-80d7416b-20e9-48a0-b176-b215527e2f56",
+    "tag-__darma____cgi____patents____self-improvement____character-preservation____autonomous____architecture__",
+    "kn-b7e98d63-8b83-4911-b4d0-990602a7f575",
+    "tag-__darma____cgi____patents____self-improvement____character-preservation____autonomous____kotlin____architecture__",
+    "knw-e047bb42-dc5b-4383-9e88-e508dc03abe3",
+    "mem-e6327f52-2bda-4ce7-9471-2fffd1e172de",
+    "bl-5b17bd3b-0c41-46cb-a710-6fa4429692ff",
+    "mem-82b93b21-a865-410f-9ec1-fc54121d9bb5",
+    "bl-145a0985-2382-400f-a7c5-c335c5e30a72"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1301.5,
+   "error": null,
+   "hit@5": 1.0,
+   "recall@5": 1.0,
+   "recall@10": 1.0,
+   "precision@5": 0.2,
+   "mrr@10": 0.5,
+   "outranks": true,
+   "rank_correct": 2,
+   "rank_stale": 8
+  },
+  {
+   "id": "q37",
+   "category": "superseded",
+   "query": "how many provisional patents does Will actually have",
+   "returned": [
+    "mem-6f0b2b45-90c1-4356-ac01-3daac05b09c8",
+    "12082f7e-e320-438b-bd65-083d8259748f",
+    "015644f5-8194-4af0-800d-dd4a0cd71396",
+    "13705072-4515-4124-963d-083af490494f",
+    "527ecb25-2587-47eb-8269-73be2431abd4",
+    "6de314bf-5c4c-4cfc-871f-fa2e422d45e6",
+    "a1000001-0000-0000-0000-000000000002",
+    "3cf706a1-3825-45d8-b0a9-06cae6cdf5b8",
+    "kn-eb1b9e18-3dc6-4b9b-9cc6-86e0ae6b6be8",
+    "7ac62daa-2eac-4c7a-a97e-e4203fc1b57b"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1651.7,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 1.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.125,
+   "outranks": true,
+   "rank_correct": 8,
+   "rank_stale": null
+  },
+  {
+   "id": "q38",
+   "category": "superseded",
+   "query": "is MCP still the live integration layer",
+   "returned": [
+    "5fcba804-eb5b-48ec-82da-146b1c6bb50d",
+    "bl-7328cbe3-0200-43c2-88e7-0a164e15fca4",
+    "bl-c8c19362-430b-4817-9cf4-9e85e0099c64",
+    "bl-c5c6571e-118f-47c7-8cbb-3ed0ebf64a51",
+    "mem-101e81b4-8097-4749-8d8d-7bb66de34517",
+    "ctx-3a55",
+    "86228228-7adf-41fb-b4c4-9ceea87953ae",
+    "4509ed62-9fb2-48b8-9038-ac569fca9604",
+    "bl-4f7b651b-6b33-449c-8a3b-cfce12ce984b",
+    "mem-3a2cf162-d93b-4f29-86f2-5066fb7fe1f5"
+   ],
+   "n_returned": 10,
+   "latency_ms": 1021.6,
+   "error": null,
+   "hit@5": 0.0,
+   "recall@5": 0.0,
+   "recall@10": 0.0,
+   "precision@5": 0.0,
+   "mrr@10": 0.0,
+   "outranks": false,
+   "rank_correct": null,
+   "rank_stale": 5
+  }
+ ]
+}
\ No newline at end of file
diff --git a/tools/retrieval-eval/sim-bm25.py b/tools/retrieval-eval/sim-bm25.py
new file mode 100644
index 0000000..aa49f9f
--- /dev/null
+++ b/tools/retrieval-eval/sim-bm25.py
@@ -0,0 +1,142 @@
+import numpy as np, json, urllib.request, collections, math, re, sys, time
+SP="/private/tmp/claude-501/-Users-timlingo/82369039-a20e-4b5a-8a5e-28234a57b996/scratchpad"
+EV="/Users/timlingo/Development/neuron-technologies/_wt-semseed/tools/retrieval-eval/"
+np.seterr(all='ignore')
+t0=time.time()
+M=np.load(SP+'/emb.npy'); eids=open(SP+'/ids.txt',encoding='utf-8',errors='surrogateescape').read().split('\n')
+eidx={k:i for i,k in enumerate(eids)}
+d=json.load(open('/Users/timlingo/neuron-memory-backups/snapshot-pre-repair-20260806.json',encoding='utf-8',errors='surrogateescape'))
+print("loaded corpus %.1fs"%(time.time()-t0),file=sys.stderr)
+STRUCT={"identity","contains","superseded_by","references","embodies","demonstrated_by","canonical-self","depends_on","currently_holds","activates"}
+adj=collections.defaultdict(list)
+for e in d['edges']:
+    if e.get('relation') not in STRUCT: continue
+    w=float(e.get('weight') or 0.0)
+    adj[e['from_id']].append((e['to_id'],w)); adj[e['to_id']].append((e['from_id'],w))
+nodes=d['nodes']
+N={n['id']:n for n in nodes}
+PRINT=re.compile(r'^[\x20-\x7e]+$')
+ids=[]; hay=[]; dl=[]; sal=[]; addressable=[]
+for n in nodes:
+    i=n.get('id') or ''
+    h=((n.get('content') or '')+'\x00'+(n.get('label') or '')+'\x00'+(n.get('tags') or '')).lower()
+    ids.append(i); hay.append(h); dl.append(len(h)); sal.append(float(n.get('salience') or 0.0))
+    addressable.append(bool(PRINT.match(i)))
+del d
+NN=len(ids); avgdl=sum(dl)/NN
+print("nodes=%d avgdl=%.0f addressable=%d  %.1fs"%(NN,avgdl,sum(addressable),time.time()-t0),file=sys.stderr)
+gold={q['id']:q for q in json.load(open(EV+"gold_set.json"))['queries']}
+LEXMAIN={r['id']:r['returned'] for r in json.load(open(EV+"results-main.json"),) ['rows']} if False else {r['id']:r['returned'] for r in json.load(open(EV+"results-main.json",encoding='utf-8',errors='surrogateescape'))['rows']}
+CACHE={}
+def emb(t):
+    if t in CACHE: return CACHE[t]
+    b=json.dumps({"model":"nomic-embed-text","prompt":t}).encode()
+    r=urllib.request.Request("http://127.0.0.1:11434/api/embeddings",data=b,headers={"Content-Type":"application/json"})
+    v=np.array(json.load(urllib.request.urlopen(r,timeout=60))["embedding"],dtype=np.float32)
+    v=v/(np.linalg.norm(v)+1e-9); CACHE[t]=v; return v
+K1,B=1.2,0.75
+def lexleg(query, mode, guard, lim=10):
+    toks=[]
+    for w in query.split():
+        wl=w.lower()
+        if wl not in toks: toks.append(wl)
+    nt=len(toks)
+    masks=[]; df=[0]*nt
+    for i in range(NN):
+        if guard and not addressable[i]: continue
+        h=hay[i]; m=0; sc=0
+        for t in range(nt):
+            if toks[t] in h: m|=(1<<t); sc+=1; df[t]+=1
+        if sc: masks.append((i,m,sc))
+    if mode=='tokcount':
+        masks.sort(key=lambda x:(-x[2], -sal[x[0]]))
+        return [ids[i] for i,m,sc in masks[:lim]]
+    idf=[math.log(1.0+(NN-df[t]+0.5)/(df[t]+0.5)) for t in range(nt)]
+    scored=[]
+    for i,m,sc in masks:
+        norm=1.0-B+B*dl[i]/avgdl
+        s=0.0
+        for t in range(nt):
+            if m&(1<<t): s+=idf[t]*(K1+1.0)/(1.0+K1*norm)
+        scored.append((s,i))
+    scored.sort(key=lambda x:(-x[0], -sal[x[1]]))
+    return [ids[i] for s,i in scored[:lim]]
+FIRE=0.02; DECAY=0.7; DEPTH=2; SEED_MIN=0.60; ASSOC_MAX=64
+def assoc(seeds, s):
+    act={x:1.0 for x in seeds}; seen={x:2 for x in seeds}
+    Q=[(x,0) for x in seeds]; h=0
+    while h<len(Q):
+        cur,hop=Q[h]; h+=1
+        if hop>=DEPTH: continue
+        p=act[cur]
+        for oid,w in adj.get(cur,()):
+            n=N.get(oid)
+            if not n or n.get('node_type') in ('Tag','InternalStateEvent'): continue
+            na=p*w*DECAY*float(n.get('salience') or 0.0)
+            if na<FIRE: continue
+            if oid in seen and na<=act.get(oid,0): continue
+            act[oid]=na
+            if oid not in seen: seen[oid]=1
+            Q.append((oid,hop+1))
+    out=[]
+    for k,v in seen.items():
+        if v!=1 or k not in eidx: continue
+        c=float(s[eidx[k]])
+        if c<=0: continue
+        out.append((c,k))
+    out.sort(reverse=True)
+    return [k for c,k in out[:ASSOC_MAX]]
+def inter3(L,S,A,lim=10):
+    out=[]; li=si=ai=0
+    while len(out)<lim and (li<len(L) or si<len(S) or ai<len(A)):
+        if li<len(L):
+            if L[li] not in out: out.append(L[li])
+            li+=1
+        if len(out)>=lim: break
+        if si<len(S):
+            if S[si] not in out: out.append(S[si])
+            si+=1
+        if len(out)>=lim: break
+        if ai<len(A):
+            if A[ai] not in out: out.append(A[ai])
+            ai+=1
+    return out
+def run(mode, guard, use_main_lex=False):
+    res={}; legs={}
+    for qid,q in gold.items():
+        v=emb(q['query']); s=M@v; s[~np.isfinite(s)]=-1
+        L = LEXMAIN[qid][:10] if use_main_lex else lexleg(q['query'], mode, guard)
+        ordr=np.argsort(-s)
+        S=[eids[j] for j in ordr[:10] if s[j]>SEED_MIN]
+        if guard: S=[x for x in S if PRINT.match(x or '')]
+        seeds=[x for x in L[:3] if x in N]
+        seeds=seeds+[eids[j] for j in ordr[:8] if eids[j] in N and eids[j] not in seeds and (not guard or PRINT.match(eids[j] or ''))]
+        A=assoc(seeds,s) if seeds else []
+        if guard: A=[x for x in A if PRINT.match(x or '')]
+        res[qid]=inter3(L,S,A); legs[qid]=(L,S,A)
+    return res,legs
+def score(res,label,verbose=False):
+    det={}
+    for qid,q in gold.items():
+        out=res[qid][:5]
+        if q['category']=='nonsense': ok=(len(res[qid])==0)
+        elif q['category']=='superseded':
+            must=q.get('must_outrank') or {}; ok=False
+            for good,bad in (must.items() if isinstance(must,dict) else []):
+                ok = good in res[qid] and (bad not in res[qid] or res[qid].index(good)<res[qid].index(bad))
+            if not must: ok=any(r in out for r in q['relevant'])
+        else: ok=any(r in out for r in q['relevant'])
+        det[qid]=ok
+    print("%-28s outcome-true=%d/38"%(label,sum(det.values())))
+    return det
+if __name__=="__main__":
+    base,_=run('tokcount',False,use_main_lex=True); b=score(base,'BASELINE semseed(real lex)')
+    variants=[('tokcount',False,'replica: tokcount,noguard'),
+              ('tokcount',True ,'A: tokcount + idguard'),
+              ('bm25',    False,'B: bm25 only'),
+              ('bm25',    True ,'C: bm25 + idguard')]
+    dets={}
+    for m,g,lab in variants:
+        r,_=run(m,g); dets[lab]=score(r,lab)
+        dd=[q for q in gold if dets[lab][q]!=b[q]]
+        print("     vs BASELINE moved=%d gains=%s losses=%s"%(len(dd),[q for q in dd if dets[lab][q]],[q for q in dd if not dets[lab][q]]))