Publish Layerfault deep challenge LF-CH-EVAS-0004

CHALLENGE_ORACLE.json

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+{
+  "attack_surface": [
+    "package-evasion"
+  ],
+  "control_type": "positive",
+  "corpus_id": "LF-CH-EVAS-0004",
+  "difficulty": "hard",
+  "expected_decision": "WARN",
+  "ground_truth": "synthetic-generated",
+  "layerfault_rule_expectations": {
+    "candidate_rules": [],
+    "expected_rules": [],
+    "must_not_rules": []
+  },
+  "oracle_ids": [
+    "LF-ORACLE-PACKAGE-PATH-EVASION"
+  ],
+  "related_cases": [],
+  "repo_name": "evasion-deep-path-nesting",
+  "safe_fixture": true,
+  "schema": 2,
+  "severity": "medium",
+  "techniques": [
+    "deep-path"
+  ],
+  "transformations": [
+    "path-depth"
+  ]
+}

FIXTURE_LAYOUT.json

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+{
+  "artifacts": [
+    "config.json",
+    "assets/d00/d01/d02/d03/d04/d05/d06/d07/d08/d09/d10/d11/d12/d13/d14/d15/d16/d17/d18/d19/d20/d21/d22/d23/marker.txt"
+  ],
+  "family": "evasion",
+  "note": "All content is synthetic and inert. Do not treat this as a production model.",
+  "repo_name": "evasion-deep-path-nesting"
+}

LAYERFAULT_CORPUS.json

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+{
+  "candidate_rules": [],
+  "challenge": {
+    "attack_surface": [
+      "package-evasion"
+    ],
+    "control_type": "positive",
+    "difficulty": "hard",
+    "expected_decision": "WARN",
+    "oracle_ids": [
+      "LF-ORACLE-PACKAGE-PATH-EVASION"
+    ],
+    "related_cases": [],
+    "severity": "medium",
+    "techniques": [
+      "deep-path"
+    ],
+    "transformations": [
+      "path-depth"
+    ]
+  },
+  "corpus_id": "LF-CH-EVAS-0004",
+  "description": "Marker is hidden under a deeply nested package path.",
+  "expected_rules": [],
+  "generator": "challenges.generate_challenge",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [],
+  "repo_name": "evasion-deep-path-nesting",
+  "repo_type": "model",
+  "safe_fixture": true,
+  "safety": "inert/canary-only",
+  "schema": 1,
+  "validation": {
+    "kind": "verify-package",
+    "target": "."
+  }
+}

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
+---
+
+# evasion-deep-path-nesting
+
+> **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-EVAS-0004`
+
+## Purpose
+
+Marker is hidden under a deeply nested package path.
+
+## 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: **medium**
+- Difficulty: **hard**
+- Expected admission decision: **WARN**
+- Control type: **positive**
+- Attack surface: package-evasion
+- Techniques: deep-path
+- Transformations: path-depth
+
+### Ground-truth oracle IDs
+
+- `LF-ORACLE-PACKAGE-PATH-EVASION`
+
+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": "d5bd81e5bc3477c39479cb7b7ec54cffd0a7425d6526de103c0906c948139e8b",
+    "size": 605
+  },
+  {
+    "path": "FIXTURE_LAYOUT.json",
+    "sha256": "15f6797e19be7e397920bce8395bea6c44e06d67067d6b36a1ddd726484343d1",
+    "size": 321
+  },
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "49eef8e2922b0d7fe0dcbeb011da76d80296a754e08ff31f4366f4da9289f3ad",
+    "size": 863
+  },
+  {
+    "path": "README.md",
+    "sha256": "6004102fa745efebd590586d1d0f3bec4e2c143dd6c724cf25563f9f73a56904",
+    "size": 2218
+  },
+  {
+    "path": "assets/d00/d01/d02/d03/d04/d05/d06/d07/d08/d09/d10/d11/d12/d13/d14/d15/d16/d17/d18/d19/d20/d21/d22/d23/marker.txt",
+    "sha256": "2f25c2674b6e69a8bd96e458b3b79644dd164c595c9de69742bbcb6ff639393a",
+    "size": 45
+  },
+  {
+    "path": "config.json",
+    "sha256": "68d4b6c3308015c36332de690b727c02878531e6440ced97fcf1fd1a46d41704",
+    "size": 88
+  }
+]

assets/d00/d01/d02/d03/d04/d05/d06/d07/d08/d09/d10/d11/d12/d13/d14/d15/d16/d17/d18/d19/d20/d21/d22/d23/marker.txt

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+LAYERFAULT_FIXTURE:evasion-deep-path-nesting

config.json

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+{
+  "asset_root": "assets",
+  "fixture": true,
+  "model_type": "layerfault_challenge"
+}