`gh stack view --json` omits the stack number that the text output prints

[xn]

Summary

gh stack view prints the stack number in its human-readable output, but gh stack view --json omits it:

$ gh stack view --short
Stack #6
» stack-b-one ○ #4 (current)
...

$ gh stack view --json | jq 'keys'
[
  "branches",
  "currentBranch",
  "trunk"
]

The per-branch objects carry pr.number, pr.url and pr.state, but the stack's own identifier is nowhere in the payload.

Why this matters

The stack number is the identifier gh stack checkout and gh stack link take, and the one shown in the GitHub stack UI — so it is the natural key for any automation. Because it is missing from the machine-readable output, scripts have to scrape it from gh stack submit's human-readable text (✓ Stack created on GitHub with 2 PRs (stack #6)) or from the UI.

Expected

Include the stack number as a top-level field in --json output, e.g. "number": 6, so --json is sufficient on its own.

Environment

• gh 2.97.0
• gh-stack v0.1.0
• git 2.50.1
• macOS 26.4.1, darwin/arm64