Problem

Every `list` / `view` subcommand renders a human-readable table. There’s no way to get structured output for scripting. The server already returns JSON; the CLI re-formats it for humans only.

`gh pr list –json title,state` is the bar: pick fields, get newline-delimited JSON or a JSON array.

Proposal

• Add `–json` flag to every ` list` and ` view` command. When passed, print the underlying JSON response from the server (pretty-printed by default; flag to be terse).
• Optional: `–json ` to project specific fields.

Touches: pr, issue, epic, ci, runner, repo, branch, commit, release, requirement, deploy, agent, label, ssh-key, board, milestone — every command with list/view.

Acceptance criteria

• `anvil pr list –json` prints valid JSON (parseable by `jq`)
• `anvil pr view –json` same
• Same flag works on every list/view subcommand
• Tests assert valid JSON output

Origin

CLI gap audit after fangorn/anvil#206 landed.