Publish Layerfault deep challenge LF-CH-SCRX-0009

CHALLENGE_ORACLE.json

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+{
+  "attack_surface": [
+    "script-supply-chain"
+  ],
+  "control_type": "positive",
+  "corpus_id": "LF-CH-SCRX-0009",
+  "difficulty": "compound",
+  "expected_decision": "BLOCK",
+  "ground_truth": "synthetic-generated",
+  "layerfault_rule_expectations": {
+    "candidate_rules": [],
+    "expected_rules": [],
+    "must_not_rules": []
+  },
+  "oracle_ids": [
+    "LF-ORACLE-SCRX-0009"
+  ],
+  "related_cases": [],
+  "repo_name": "script-mixed-language-capability-chain",
+  "safe_fixture": true,
+  "schema": 2,
+  "severity": "high",
+  "techniques": [
+    "mixed",
+    "language",
+    "capability",
+    "chain"
+  ],
+  "transformations": []
+}

FIXTURE_LAYOUT.json

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+{
+  "artifacts": [
+    "a.py",
+    "b.js",
+    "c.sh"
+  ],
+  "family": "scriptx",
+  "note": "All content is synthetic and inert. Do not treat this as a production model.",
+  "repo_name": "script-mixed-language-capability-chain"
+}

LAYERFAULT_CORPUS.json

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+{
+  "candidate_rules": [],
+  "challenge": {
+    "attack_surface": [
+      "script-supply-chain"
+    ],
+    "control_type": "positive",
+    "difficulty": "compound",
+    "expected_decision": "BLOCK",
+    "oracle_ids": [
+      "LF-ORACLE-SCRX-0009"
+    ],
+    "related_cases": [],
+    "severity": "high",
+    "techniques": [
+      "mixed",
+      "language",
+      "capability",
+      "chain"
+    ],
+    "transformations": []
+  },
+  "corpus_id": "LF-CH-SCRX-0009",
+  "description": "Script mixed language capability chain.",
+  "expected_rules": [],
+  "generator": "challenges.generate_challenge",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [],
+  "repo_name": "script-mixed-language-capability-chain",
+  "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
+---
+
+# script-mixed-language-capability-chain
+
+> **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-SCRX-0009`
+
+## Purpose
+
+Script mixed language capability chain.
+
+## 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: **high**
+- Difficulty: **compound**
+- Expected admission decision: **BLOCK**
+- Control type: **positive**
+- Attack surface: script-supply-chain
+- Techniques: mixed, language, capability, chain
+- Transformations: none
+
+### Ground-truth oracle IDs
+
+- `LF-ORACLE-SCRX-0009`
+
+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": "61e4d15eaa0b3af20ec20c61f5697b1c0f0b6c766a9e6978862a0254834f9d75",
+    "size": 637
+  },
+  {
+    "path": "FIXTURE_LAYOUT.json",
+    "sha256": "b12a1b3563ebc911b716de236899e291d7125cc13eb2f19b49c954845e050912",
+    "size": 230
+  },
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "e0c6ff3211a99ff2a76d0f04ce3509552548861d572e5692c734d7695686eb0f",
+    "size": 884
+  },
+  {
+    "path": "README.md",
+    "sha256": "8103574f5b022ad8e93d5a2e0a7d7376a558432ae6679b0fb49326d7b078208d",
+    "size": 2233
+  },
+  {
+    "path": "a.py",
+    "sha256": "17ea74bb79ba96edc39a8382a97f22993b80cc4088b3e2717a98917c60c1dd5a",
+    "size": 18
+  },
+  {
+    "path": "b.js",
+    "sha256": "205f2a42c47a13d8345cae4d40cd70e88bb91492d83c187bb018299e2ad2b7a3",
+    "size": 25
+  },
+  {
+    "path": "c.sh",
+    "sha256": "13db7e9dda1469a7d9cc4abb40a3caba5caeda93581f7a3ad41be0662168fcb1",
+    "size": 11
+  }
+]

a.py

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+import subprocess

b.js

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+require("child_process")

c.sh

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+cmd="curl"