import type { EnvironmentId, ThreadId } from "@t3tools/contracts"; interface ThreadActivityFileContext {  readonly environmentId: EnvironmentId;  readonly currentThreadId: ThreadId;  readonly activitySourceThreadId: ThreadId;  readonly relativePath: string;  readonly line?: number | null;} export function buildThreadActivityFileParams(input: ThreadActivityFileContext) {  // Activity provenance may come from a parent thread, but file routes stay scoped  // to the thread whose workspace is currently selected.  return {    environmentId: String(input.environmentId),    threadId: String(input.currentThreadId),    path: input.relativePath.split("/").filter((segment) => segment.length > 0),    ...(Number.isFinite(input.line) && Number(input.line) > 0      ? { line: String(Math.floor(Number(input.line))) }      : {}),  };}