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   </p>
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-<section id="index" class="appendix">
+<section id="substantive-changes-summary" class="appendix informative">
+  <h2>Summary of substantive changes</h2>
+  <section id="substantive-changes-summary-fpwd">
+    <h3>Changes since the <a href="https://www.w3.org/TR/2022/WD-compute-pressure-20221220/">First Public Working Draft (2022/12/20)</a></h3>
+    <ul>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/302">Remove the limiting of rate as it is replace by obfuscation (PR #302)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/300">Move at-risk to experimental on PressureSource/thermals (PR #300)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/293">Make thermal pressure source at-risk (PR #293)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/292">Get rid of the global current pressure state (PR #292)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/284">Add an Automation section with WebDriver support to the spec (PR #284)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/283">Make PressureObserver.observe() and data delivery algorithm less vague (PR #283)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/280">data delivery: Set timestamp as an "unsafe shared current time" (PR #280)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/276">Rework handling of fully active status (PR #276)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/274">timestamp: Redefine timestamp in Data delivery (PR #274)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/268">Rename supportedSources to knownSources (PR #268)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/263">Associate sample interval with source (PR #263)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/261">Move options to observe() (PR #261)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/254">Change sampleRate to sampleInterval (PR #254)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/241">Provide guidelines for mitigation algorithms (PR #241)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/239">Require all owning documents to have permission policy enabled (PR #239)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/238">Support workers in privacy algos (PR #238)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/236">Use same origin checks instead of same origin-domain ones (PR #236)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/230">Fix penalty algorithm (PR #230)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/227">Fix definition of ChangesCountMap (PR #227)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/225">Break calibration (PR #225)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/223">Add rate obfuscation test requirement (PR #223)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/203">Do not expose contributing factors (PR #203)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/202">Introduce 'thermals' source type (PR #202)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/192">Adjust pressure states and add new explorations as a result (PR #192)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/191">Privacy check: Remove ordered list between worker and window (PR #191)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/180">Add an implementation-defined change threshold exceeded check (PR #180)</a></li>
+      <li><a href="https://github.com/w3c/compute-pressure/pull/175">Add toJSON for PressureRecord, and fix spec link issues (PR #175)</a></li>
+    </ul>
 </section>
 
+<section id="index" class="appendix">
+</section>
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 </section>