Internal Selection and Revisable Organization: How History Changes Permissions and Physical Sources

A physical system can use its records to revise the operations through which it reads and acts. We construct this process with an internal program, a fixed executor and a record-driven update. Controlled couplings select protected algebras; overlap of their spectra permits coherent internal choices without a central program label. The same choice changes an outgoing matter source. A qubit loop has two configurations whose records select their own protection, and different initial histories produce late source weights $1/3$ and $2/3$. With rotation noise these choices persist for a calculable window and eventually lose their contrast. An arbitrary quantum record can also be converted into the two sustained source configurations: the largest achievable source-weight contrast equals the trace distance between the record states. Finite execution errors shorten the history window by their accumulated operational error. A separate price concerns sharp readouts. Selecting every sharp qubit measurement on a great circle to worst-case basis-state error $\delta$ requires program dimension of order $\delta^{-1/2}$; pure and mixed programs have the same feasible dimensions for this criterion. These results identify what history can form inside a supplied architecture. They support a broader mechanism in which learned relations become revisable permissions, while leaving primitive couplings and their origin as a distinct generation problem.