{"record":{"id":"48162d49a8fedbd1","repo":"deepseek-ai/deepseek-harness","slug":"session-header-is-not-a-plain-json-record","errorCode":null,"errorMessage":"session header is not a plain JSON record","messagePattern":"session header is not a plain JSON record","errorType":"validation","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/core/session/src/index.ts","lineNumber":98,"sourceCode":"     * (`@deepseek-ai/dsh-scope`) reuses the session's owner scope.\n     * @param session - the session whose buffered events must reach durable storage.\n     * @dshScopeScan unsupported\n     * @mode parallel\n     */\n    'session/flush'(this: Scoped<Session>, session: Session): Promise<void> | void\n  }\n}\n\ndeclare module '@deepseek-ai/dsh-typert-protocol' {\n  interface TypertLookupMap {\n    session: TypertLookup<Session, SessionId>\n  }\n}\n\n/** Validate and freeze one detached creation header in place. */\nfunction validateSessionHeader(id: SessionId, input: unknown): SessionHeader {\n  if (input === null || typeof input !== 'object' || Array.isArray(input)) {\n    throw new Error('session header is not a plain JSON record')\n  }\n  const record = input as Record<string, unknown>\n  if (record.version !== SESSION_FORMAT_VERSION) {\n    throw new Error(`session header version must be ${SESSION_FORMAT_VERSION}, got ${String(record.version)}`)\n  }\n  if (record.id !== id) {\n    throw new Error(`session header id \"${String(record.id)}\" does not match session id \"${id}\"`)\n  }\n  if (typeof record.createdAt !== 'number'\n    || !Number.isSafeInteger(record.createdAt)\n    || record.createdAt < 0) {\n    throw new Error('session header createdAt must be a non-negative safe integer')\n  }\n  if (record.cwd !== undefined) {\n    if (typeof record.cwd !== 'string') throw new Error('session header cwd must be a string')\n    if (!isAbsolute(record.cwd)) {\n      throw new Error(`session header cwd must be an absolute path, got \"${record.cwd}\"`)\n    }","sourceCodeStart":80,"sourceCodeEnd":116,"githubUrl":"https://github.com/deepseek-ai/deepseek-harness/blob/b150a551b8d465e31e418e1b2eaf5e79bbb7d28e/packages/core/session/src/index.ts#L80-L116","documentation":"Error \"session header is not a plain JSON record\" thrown in deepseek-ai/deepseek-harness.","triggerScenarios":"Thrown at packages/core/session/src/index.ts:98 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Store a plain JSON record as the session header."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b150a551b8d465e31e418e1b2eaf5e79bbb7d28e","analyzedAt":"2026-08-24T18:12:29.105Z","schemaVersion":2},"datasetVersion":"2026-08-24T22:17:12.610Z"}