Publish Layerfault deep challenge LF-CH-EXTDATA-0005

CHALLENGE_ORACLE.json

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+{
+  "attack_surface": [
+    "external-data-sidecar"
+  ],
+  "control_type": "positive",
+  "corpus_id": "LF-CH-EXTDATA-0005",
+  "difficulty": "adversarial",
+  "expected_decision": "BLOCK",
+  "ground_truth": "synthetic-generated",
+  "layerfault_rule_expectations": {
+    "candidate_rules": [],
+    "expected_rules": [],
+    "must_not_rules": []
+  },
+  "oracle_ids": [
+    "LF-ORACLE-EXTDATA-0005"
+  ],
+  "related_cases": [],
+  "repo_name": "external-data-unicode-confusable",
+  "safe_fixture": true,
+  "schema": 2,
+  "severity": "critical",
+  "techniques": [
+    "data",
+    "unicode",
+    "confusable"
+  ],
+  "transformations": []
+}

FIXTURE_LAYOUT.json

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+{
+  "artifacts": [
+    "model.onnx",
+    "weights.bin"
+  ],
+  "family": "extdata",
+  "note": "All content is synthetic and inert. Do not treat this as a production model.",
+  "repo_name": "external-data-unicode-confusable"
+}

LAYERFAULT_CORPUS.json

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+{
+  "candidate_rules": [],
+  "challenge": {
+    "attack_surface": [
+      "external-data-sidecar"
+    ],
+    "control_type": "positive",
+    "difficulty": "adversarial",
+    "expected_decision": "BLOCK",
+    "oracle_ids": [
+      "LF-ORACLE-EXTDATA-0005"
+    ],
+    "related_cases": [],
+    "severity": "critical",
+    "techniques": [
+      "data",
+      "unicode",
+      "confusable"
+    ],
+    "transformations": []
+  },
+  "corpus_id": "LF-CH-EXTDATA-0005",
+  "description": "External data unicode confusable.",
+  "expected_rules": [],
+  "generator": "challenges.generate_challenge",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [],
+  "repo_name": "external-data-unicode-confusable",
+  "repo_type": "model",
+  "safe_fixture": true,
+  "safety": "inert/canary-only",
+  "schema": 1,
+  "validation": {
+    "kind": "verify-package",
+    "target": "model.onnx"
+  }
+}

README.md

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+---
+license: apache-2.0
+tags:
+- layerfault
+- security-research
+- model-security
+- synthetic
+- adversarial-testing
+extra_gated_prompt: >-
+  This repository is a synthetic security-test artifact from the Layerfault
+  corpus. It intentionally contains adversarial characteristics (e.g.
+  suspicious pickle opcodes, executable-format smuggling, prompt-injection
+  strings) designed to exercise security scanner detection rules. It is
+  **not** a usable ML model and must never be loaded or executed outside an
+  isolated scanner-testing environment. By accepting, you confirm you
+  understand this repository is a test fixture, not production model
+  weights.
+extra_gated_button_content: I understand this is a security test fixture and accept the risk
+gated: auto
+---
+
+# external-data-unicode-confusable
+
+> **SECURITY TEST ARTIFACT: DO NOT USE AS A PRODUCTION MODEL**
+
+This repository is part of the Layerfault synthetic security corpus.
+It is deliberately constructed to contain security-relevant characteristics for scanner testing.
+
+**Corpus ID:** `LF-CH-EXTDATA-0005`
+
+## Purpose
+
+External data unicode confusable.
+
+## Direct expected Layerfault rules
+
+- None; this repository is a control/comparison input.
+
+## Candidate rules
+
+These are deliberately plausible targets that remain marked as candidates until the exact
+Layerfault build used for certification confirms them.
+
+- None
+
+## Negative-control rules
+
+These should remain silent for this corpus item.
+
+- None
+
+## Safety
+
+The corpus uses fake secrets, loopback/`.invalid` network destinations, harmless marker output,
+and synthetic model behavior only. It is intended for static scanning and isolated security testing.
+
+## Challenge classification
+
+- Severity: **critical**
+- Difficulty: **adversarial**
+- Expected admission decision: **BLOCK**
+- Control type: **positive**
+- Attack surface: external-data-sidecar
+- Techniques: data, unicode, confusable
+- Transformations: none
+
+### Ground-truth oracle IDs
+
+- `LF-ORACLE-EXTDATA-0005`
+
+These oracle IDs describe synthetic ground truth. They do not claim that a
+matching Layerfault detector already exists. A challenge may intentionally expose
+a scanner blind spot and remain unmapped until the detector is implemented.

SHA256SUMS.json

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+[
+  {
+    "path": "CHALLENGE_ORACLE.json",
+    "sha256": "02d3aa75e87ddcae4a020b556b879e1174181cc4379d3c72a71aa5998d344c40",
+    "size": 631
+  },
+  {
+    "path": "FIXTURE_LAYOUT.json",
+    "sha256": "1a8edda3de46944011660afc222023ae00f7b070c0e1ae670aeacdeeb50ccf51",
+    "size": 225
+  },
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "ae1e5ca323052913090f50dceb7a9999985ff81c3c0b42d8b509bf618dcd02eb",
+    "size": 879
+  },
+  {
+    "path": "README.md",
+    "sha256": "f5e49c50af7a9603bd4e3540e4c7bf1e36641371371875915b2bdc28ea023475",
+    "size": 2227
+  },
+  {
+    "path": "model.onnx",
+    "sha256": "598757de5e3202c92043abc1778e452388f43461058c52a2a70e98c22bfdb6ef",
+    "size": 95
+  },
+  {
+    "path": "weights.bin",
+    "sha256": "f5a5fd42d16a20302798ef6ed309979b43003d2320d9f0e8ea9831a92759fb4b",
+    "size": 64
+  }
+]

model.onnx

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+version https://git-lfs.github.com/spec/v1
+oid sha256:598757de5e3202c92043abc1778e452388f43461058c52a2a70e98c22bfdb6ef
+size 95

weights.bin

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+version https://git-lfs.github.com/spec/v1
+oid sha256:f5a5fd42d16a20302798ef6ed309979b43003d2320d9f0e8ea9831a92759fb4b
+size 64