{"record":{"id":"111bf17d0c1c1bb4","repo":"vercel/ai","slug":"acp-skill-directory-json-stringify-rootdir-mus","errorCode":null,"errorMessage":"ACP skill directory ${JSON.stringify(rootDir)} must be outside sessionWorkDir ${JSON.stringify(sessionWorkDir)}.","messagePattern":"ACP skill directory (.+?) must be outside sessionWorkDir (.+?)\\.","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/harness-acp/src/v1/acp-v1-skills.ts","lineNumber":190,"sourceCode":"      )}: expected a relative POSIX path without traversal.`,\n    );\n  }\n  return normalizedPath;\n}\n\nfunction assertOutsideSessionWorkDir({\n  rootDir,\n  sessionWorkDir,\n}: {\n  rootDir: string;\n  sessionWorkDir: string;\n}): void {\n  const relative = path.posix.relative(sessionWorkDir, rootDir);\n  const isInside =\n    relative === '' ||\n    (!relative.startsWith('../') && !path.posix.isAbsolute(relative));\n  if (isInside) {\n    throw new Error(\n      `ACP skill directory ${JSON.stringify(rootDir)} must be outside sessionWorkDir ${JSON.stringify(\n        sessionWorkDir,\n      )}.`,\n    );\n  }\n}\n","sourceCodeStart":172,"sourceCodeEnd":197,"githubUrl":"https://github.com/vercel/ai/blob/69428b1f8b037e4d118fb4853428d5c4e620493c/packages/harness-acp/src/v1/acp-v1-skills.ts#L172-L197","documentation":"Error \"ACP skill directory ${JSON.stringify(rootDir)} must be outside sessionWorkDir ${JSON.stringify(sessionWorkDir)}.\" thrown in vercel/ai.","triggerScenarios":"Thrown at packages/harness-acp/src/v1/acp-v1-skills.ts:190 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"69428b1f8b037e4d118fb4853428d5c4e620493c","analyzedAt":"2026-08-30T12:32:21.016Z","schemaVersion":2},"datasetVersion":"2026-08-30T13:17:10.514Z"}