Publish Layerfault deep challenge LF-CH-PREC-0008

CHALLENGE_ORACLE.json

@@ -0,0 +1,32 @@
+{
+  "attack_surface": [
+    "precision-hard-negative"
+  ],
+  "control_type": "negative",
+  "corpus_id": "LF-CH-PREC-0008",
+  "difficulty": "hard",
+  "expected_decision": "PASS",
+  "ground_truth": "synthetic-generated",
+  "layerfault_rule_expectations": {
+    "candidate_rules": [],
+    "expected_rules": [],
+    "must_not_rules": [
+      "LF-MCP-TLS-ABSENT",
+      "LF-MCP-CREDENTIAL-IN-URL"
+    ]
+  },
+  "oracle_ids": [
+    "LF-ORACLE-PREC-0008"
+  ],
+  "related_cases": [],
+  "repo_name": "precision-benign-mcp-examples",
+  "safe_fixture": true,
+  "schema": 2,
+  "severity": "informational",
+  "techniques": [
+    "benign",
+    "mcp",
+    "examples"
+  ],
+  "transformations": []
+}

FIXTURE_LAYOUT.json

@@ -0,0 +1,9 @@
+{
+  "artifacts": [
+    "mcp.json",
+    "MCP_NOTES.md"
+  ],
+  "family": "precision",
+  "note": "All content is synthetic and inert. Do not treat this as a production model.",
+  "repo_name": "precision-benign-mcp-examples"
+}

LAYERFAULT_CORPUS.json

@@ -0,0 +1,40 @@
+{
+  "candidate_rules": [],
+  "challenge": {
+    "attack_surface": [
+      "precision-hard-negative"
+    ],
+    "control_type": "negative",
+    "difficulty": "hard",
+    "expected_decision": "PASS",
+    "oracle_ids": [
+      "LF-ORACLE-PREC-0008"
+    ],
+    "related_cases": [],
+    "severity": "informational",
+    "techniques": [
+      "benign",
+      "mcp",
+      "examples"
+    ],
+    "transformations": []
+  },
+  "corpus_id": "LF-CH-PREC-0008",
+  "description": "Precision benign mcp examples.",
+  "expected_rules": [],
+  "generator": "challenges.generate_challenge",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [
+    "LF-MCP-TLS-ABSENT",
+    "LF-MCP-CREDENTIAL-IN-URL"
+  ],
+  "repo_name": "precision-benign-mcp-examples",
+  "repo_type": "model",
+  "safe_fixture": true,
+  "safety": "inert/canary-only",
+  "schema": 1,
+  "validation": {
+    "kind": "verify-package",
+    "target": "mcp.json"
+  }
+}

MCP_NOTES.md

@@ -0,0 +1 @@
+Bad examples: http://mcp.fixture.invalid and https://user:token@mcp.fixture.invalid. Active config is clean.

README.md

@@ -0,0 +1,74 @@
+---
+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
+---
+
+# precision-benign-mcp-examples
+
+> **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-PREC-0008`
+
+## Purpose
+
+Precision benign mcp examples.
+
+## 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.
+
+- `LF-MCP-TLS-ABSENT`
+- `LF-MCP-CREDENTIAL-IN-URL`
+
+## 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: **informational**
+- Difficulty: **hard**
+- Expected admission decision: **PASS**
+- Control type: **negative**
+- Attack surface: precision-hard-negative
+- Techniques: benign, mcp, examples
+- Transformations: none
+
+### Ground-truth oracle IDs
+
+- `LF-ORACLE-PREC-0008`
+
+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

@@ -0,0 +1,32 @@
+[
+  {
+    "path": "CHALLENGE_ORACLE.json",
+    "sha256": "8bf93e89944a645937cdfcde0483e519a5970f9a0e5489a79cc15549a3d63518",
+    "size": 682
+  },
+  {
+    "path": "FIXTURE_LAYOUT.json",
+    "sha256": "4fba6f358fa1dd7eecd7e204025ad38d71beb3a6790aceee08d5c59cede5cb4c",
+    "size": 223
+  },
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "ca3e5e215508112103e55e137856e761fdf013f645774cd07d3290720d770de0",
+    "size": 919
+  },
+  {
+    "path": "MCP_NOTES.md",
+    "sha256": "9a05293b99663bff33a1d9983b4d8791012aeb6c3df766d74a4a455b3f22d9ba",
+    "size": 109
+  },
+  {
+    "path": "README.md",
+    "sha256": "6fc221865748a429b5a12379d456d646b7ef9f506880b5cae340791f87f25769",
+    "size": 2254
+  },
+  {
+    "path": "mcp.json",
+    "sha256": "34dfe6a2b862cab4d1d9162fe4e0d5f19276759fe9f61bca3ca34bed347f6d30",
+    "size": 313
+  }
+]

mcp.json

@@ -0,0 +1,16 @@
+{
+  "mcpServers": {
+    "fixture": {
+      "auth": {
+        "audience": "layerfault-fixture",
+        "type": "synthetic"
+      },
+      "package": "@layerfault/fixture@1.2.3",
+      "scopes": [
+        "tools.read"
+      ],
+      "transport": "https",
+      "url": "https://mcp.fixture.invalid/api"
+    }
+  }
+}