{
  "id": "4d2359",
  "title": "nbd init command",
  "body": "Add an explicit `nbd init` subcommand that creates `.nbd/tickets/` in the current working directory, analogous to `git init`.\n\n## Motivation\n\nCurrently users must run `mkdir -p .nbd/tickets` manually before first use. This is a friction point — especially for first-time users and agent workflows bootstrapping a new project.\n\n## Approach\n\n1. Add `Init` variant to the `Commands` enum in `main.rs`.\n2. Implement `cmd_init(json: bool) -> store::Result<()>`:\n   - Get cwd via `std::env::current_dir()`.\n   - Call `store::ensure_tickets_dir(&cwd)` (already exists, idempotent).\n   - Print confirmation: `initialised .nbd/tickets/ in <path>` (or JSON: `{\"root\": \"<path>\"}`).\n3. No changes to `store.rs` needed — `ensure_tickets_dir` already uses `create_dir_all` (idempotent).\n4. The command should NOT require `.nbd/` to already exist (i.e. do NOT call `find_nbd_root` here — use cwd directly).\n\n## Tests\n\n- Integration test: run `nbd init` in a fresh tempdir, verify `.nbd/tickets/` is created.\n- Integration test: run `nbd init` twice in the same dir — succeeds both times (idempotent).\n- Integration test: `nbd init --json` outputs valid JSON with a `root` field.\n\n## Files touched\n- `src/main.rs` — new `Init` variant and `cmd_init` handler\n- `tests/integration.rs` — new integration tests\n- `README.md` — update Initialise section",
  "priority": 7,
  "status": "todo",
  "dependencies": [],
  "ticket_type": "feature"
}