Replace PR #998 with OPC native causal packed-memory non-record packet

records/track_non_record_16mb/2026-03-30_OPC_CausalPackedMemory_NativeFullSpecClean/README.md

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+# OPC causal packed-memory legal packet stress test
+
+This packet was rebuilt from scratch in a standalone workspace on top of the `open_predictive_coder` kernel.
+
+- track: `track_non_record_16mb`
+- run_id: `opc_native_tokens100000000_62021846`
+- eval bits per token: `6.062992566022187`
+- unigram bits per token: `8.649563865337807`
+- bigram bits per token: `6.090255597305575`
+- trigram bits per token: `7.22427841818739`
+- train bits per token: `6.0696419226081915`
+- mixture weights: `[0.0, 0.9, 0.1]`
+- artifact bytes: `2705939`
+- opc upstream: `https://github.com/asuramaya/open-predictive-coder`
+- opc commit: `4072074288fa279b655c11c30f8fca2e1859f925`
+
+Important scope note:
+
+- this is a legal packet stress test and descendant rebuild
+- it is not a leaderboard claim
+- the model is an opc-native causal packed-memory descendant built in this workspace

records/track_non_record_16mb/2026-03-30_OPC_CausalPackedMemory_NativeFullSpecClean/audits_bundle/audits.json

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+{
+  "tier1": {
+    "status": "pass",
+    "submission": "pass",
+    "provenance": null
+  },
+  "tier3": {
+    "status": "warn",
+    "scope": "one_shot_runtime_handoff",
+    "legality": "pass",
+    "trust_level_requested": "strict",
+    "trust_level_achieved": "strict",
+    "trust_satisfied": true,
+    "replay": "pass"
+  }
+}

records/track_non_record_16mb/2026-03-30_OPC_CausalPackedMemory_NativeFullSpecClean/audits_bundle/claim.json

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+{
+  "candidate_id": "opc-native-full-spec-rel",
+  "requested_label": "Tier-1 reviewed",
+  "submission_name": "OPC causal packed-memory legal packet stress test",
+  "track": null
+}

records/track_non_record_16mb/2026-03-30_OPC_CausalPackedMemory_NativeFullSpecClean/audits_bundle/ledger_manifest.json

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+{
+  "bundle_id": "opc-native-full-spec-rel",
+  "attachments": [
+    {
+      "source": "reports/submission.json",
+      "dest": "audits/tier1/submission.json"
+    },
+    {
+      "source": "reports/legality.json",
+      "dest": "audits/tier3/legality.json"
+    },
+    {
+      "source": "reports/replay.json",
+      "dest": "audits/tier3/replay.json"
+    }
+  ],
+  "claim": "claim.json",
+  "metrics": "metrics.json",
+  "provenance": "provenance.json",
+  "audits": "audits.json"
+}

records/track_non_record_16mb/2026-03-30_OPC_CausalPackedMemory_NativeFullSpecClean/audits_bundle/metrics.json

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+{
+  "fresh_process_full": {
+    "bpb": 2.48898442865273
+  },
+  "packed_artifact_full": {
+    "bpb": 2.48898442865273,
+    "artifact_bytes": 2705939
+  },
+  "replay": {
+    "total_loss_nats": 277494.23437665706,
+    "mean_loss_nats": 4.234225988413346,
+    "mean_bpb": 6.1086968354871045
+  }
+}

records/track_non_record_16mb/2026-03-30_OPC_CausalPackedMemory_NativeFullSpecClean/audits_bundle/provenance.json

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+{
+  "run_id": "source_submission",
+  "source_root": ".",
+  "source_repo": "opc-parameter-golf-submission"
+}