fix: avoid duplicate gh view bodies

scripts/src/gh/issue-read.ts

@@ -128,7 +128,9 @@ export function selectedIssueJson(issue: GitHubIssue, comments: GitHubComment[]
   const summary = issueSummary(issue);
   const selected: Record<string, unknown> = {};
   for (const field of fields) {
-    if (field === "comments") {
+    if (field === "body") {
+      continue;
+    } else if (field === "comments") {
       selected.comments = (comments ?? []).map(options.includeFullCommentBodies === true ? commentSummary : compactIssueViewCommentSummary);
     } else {
       selected[field] = summary[field];
@@ -189,7 +191,13 @@ export async function issueRead(repo: string, token: string, issueNumber: number
       json: selectedIssueJson(issue, comments, jsonFields, { includeFullCommentBodies }),
       compatibility: {
         legacyJsonBodyPath: includeBody ? ".data.issue.body" : null,
+        bodyPath: includeBody ? ".data.issue.body" : null,
+        omittedDuplicateBodyPath: includeBody ? ".data.json.body" : null,
+        duplicateBodyOmitted: includeBody,
         bodyOmitted: !includeBody,
+        bodyMigrationHint: includeBody
+          ? "Read the full body from .data.issue.body; .data.json.body is intentionally omitted so large bodies are emitted only once."
+          : null,
         ...commentsCompatibility,
         readCommands: {
           ...(includeBody ? {} : issueBodyReadCommands(repo, issueNumber)),