BUILD IT NOW. ENSHRINE IT FOREVER.
Make the argument as rigorous as the institution would need to be.
A fourth branch is not justified because existing institutions are worthless. The proposal asks whether public accountability is important enough to deserve an institution whose core mandate, independence and limits are constitutional rather than incidental.
THE CASE
Problem. Boundary. Counterweight. Text.
The constitutional section is organized so every claim about new authority is followed by a limit, a reviewing institution, or a public accountability obligation.
TRUST & OPERATIONS
Now test how the institution would behave.
The constitutional case defines why the branch might exist. This layer defines how evidence, rights, conflicts, whistleblowers, referrals, public consent and failure testing would constrain it in practice.