Bootstrap session context with get_session_context

Goal: fetch a repository’s open milestones and, optionally, a Projects v2 board’s state in one call — the equivalent of what Claude Code’s session-start.mjs hook injects automatically, for any MCP host that has no such hook.

Prerequisites

• Read access to the target repository and (if requesting board state) the target project.

Steps

1. For milestones only:

   { "owner": "your-org", "repo": "your-repo" }

2. For milestones plus board state, add the project fields:

   {
     "owner": "your-org",
     "repo": "your-repo",
     "projectOwnerLogin": "your-org",
     "projectNumber": 1
   }

   projectOwnerType defaults to organization; pass "user" for a user-owned project.

3. Read the response: { openMilestones: [...], projectBoard: {...} | null }.

Verify it worked

• openMilestones matches list_milestones called with state: "open".
• projectBoard is null unless you supplied both projectOwnerLogin and projectNumber — supplying only one still returns null for projectBoard, it does not error.
• When non-null, projectBoard has the same shape as get_project_items’s result.

See also: tool reference.