Feature request: Add bulk issue creation tool for MCP (issueBatchCreate) #1087

Problem

When syncing large numbers of issues from external tools (e.g., codebase analysis tools, migration scripts), the only option is to call save_issue one at a time. For 78 issues, this means 78 sequential API calls taking ~2 minutes, where Linear's GraphQL API supports issueBatchCreate for up to 50 issues per call.

Use Case

I'm using codesight (a codebase indexing tool) that exports hundreds of bugs/tasks as structured data. Syncing these to Linear via MCP requires calling save_issue in a loop slow and noisy in agent conversations.

Proposed Solution

Add a batch_save_issues tool that accepts an array of issue objects and maps to
Linear's issueBatchCreate GraphQL mutation.

{
  "issues": [
    { "title": "...", "team": "...", "project": "...", "priority": 2, "labels": ["Bug"] },
    { "title": "...", "team": "...", "project": "...", "priority": 2, "labels": ["Bug"] }
  ]
}

Returns array of created issue IDs/identifiers.

Benefits

• Performance: 50 issues per call instead of 1
• Token efficiency: Reduces agent context usage significantly
• Already supported by Linear API: issueBatchCreate mutation exists

Alternatives Considered

• Calling save_issue in parallel (current workaround, still 1 API call per issue)
• Using Linear GraphQL API directly via HTTP (bypasses MCP entirely)