We consider the short-lived radionuclide (SLR) <sup>36</sup>Cl in calcium-aluminum-rich inclusions (CAIs) found in primitive meteorites with the solar wind implantation model. In this model, SLRs are produced via nuclear reaction with solar energetic particles (SEPs) interacting with gaseous targets in the protosolar atmosphere in T-Tauri stars. These SLRs are captured by the solar wind and then implanted in CAI precursor materials, which have dropped from the funnel flow leading onto the protostar. This method of incorporating SLRs into solar system materials is currently active in our solar system and has been measured with SLRs from the solar wind being implanted on the lunar surface. T-Tauri stars are capable of SEP fluxes <i>~</i>10<sup>5</sup> greater than contemporary SEP fluxes. Here we scale the production rate of <sup>36</sup>Cl to the ancient SEP activity. From the enhanced production rates and the refractory mass inflow rate at 0.06 AU from the protosun, we model the ancient <sup>36</sup>Cl content in CAIs. We find the initial isotopic ratio of <sup>36</sup>Cl/<sup>35</sup>Cl to range from about 1 × 10<sup>−5</sup> to 5 × 10<sup>−5</sup> and the concentration of <sup>36</sup>Cl to range from about 3 × 10<sup>13</sup> to 1.5 × 10<sup>14</sup> atoms g<sup>−1</sup>.