Merge #777: auto-compact and auto-clear from the statusLine context size

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

src/web/public/index.html

@@ -1637,7 +1637,7 @@
                       <span class="set-row-desc">Summarizes the context at the threshold while preserving key information.</span>
                     </div>
                     <div class="set-row-actions">
-                      <input type="number" id="modalAutoCompactThreshold" class="set-num set-num-wide" value="110000" min="10000" max="500000" step="10000" onchange="app.autoSaveAutoCompact()">
+                      <input type="number" id="modalAutoCompactThreshold" class="set-num set-num-wide" value="110000" min="10000" max="1000000" step="10000" onchange="app.autoSaveAutoCompact()">
                       <span class="set-unit">tokens</span>
                       <label class="switch switch-sm"><input type="checkbox" id="modalAutoCompactEnabled" onchange="app.autoSaveAutoCompact()"><span class="slider"></span></label>
                     </div>
@@ -1655,7 +1655,7 @@
                       <span class="set-row-desc">Full context reset at the threshold. Keep it higher than auto-compact.</span>
                     </div>
                     <div class="set-row-actions">
-                      <input type="number" id="modalAutoClearThreshold" class="set-num set-num-wide" value="140000" min="10000" max="500000" step="10000" onchange="app.autoSaveAutoClear()">
+                      <input type="number" id="modalAutoClearThreshold" class="set-num set-num-wide" value="140000" min="10000" max="1000000" step="10000" onchange="app.autoSaveAutoClear()">
                       <span class="set-unit">tokens</span>
                       <label class="switch switch-sm"><input type="checkbox" id="modalAutoClearEnabled" onchange="app.autoSaveAutoClear()"><span class="slider"></span></label>
                     </div>

src/web/public/session-ui.js

@@ -2831,7 +2831,11 @@ Object.assign(CodemanApp.prototype, {
     // Populate respawn config from saved state
     this.loadSavedRespawnConfig(sessionId);
 
-    // Populate auto-compact/clear from session state
+    // Populate auto-compact/clear from session state. A threshold above the model's window
+    // can never fire, so the inputs stop there once the statusline has reported it.
+    const maxThreshold = session.contextWindowSize ?? 1000000;
+    document.getElementById('modalAutoCompactThreshold').max = maxThreshold;
+    document.getElementById('modalAutoClearThreshold').max = maxThreshold;
     document.getElementById('modalAutoCompactEnabled').checked = session.autoCompactEnabled ?? false;
     document.getElementById('modalAutoCompactThreshold').value = session.autoCompactThreshold ?? 110000;
     document.getElementById('modalAutoCompactPrompt').value = session.autoCompactPrompt ?? '';

src/web/routes/status-telemetry-routes.ts

@@ -65,6 +65,13 @@ export function registerStatusTelemetryRoutes(app: FastifyInstance, ctx: Session
       session.noteReportedModel('statusline', payload?.model?.display_name);
     }
 
+    // The context size drives auto-compact and auto-clear. A render without one (the exporter
+    // can post before the first API response) keeps the last report instead of wiping it.
+    const status = reportsStatusLine ? parseSessionStatus(payload) : null;
+    if (session && status?.inputTokens !== undefined) {
+      session.noteContextReport({ tokens: status.inputTokens, windowSize: status.contextWindowSize });
+    }
+
     // Prompt-cache state of the main conversation (Claude Code v2.1.251+): kept on the
     // session for the Session Options readout and `toState()`, broadcast only when the
     // report changes (the statusline fires on every assistant message). The broadcast

src/web/schemas.ts

@@ -733,6 +733,7 @@ export const StatusTelemetrySchema = z.object({
           used_percentage: z.number().nullish(),
           total_input_tokens: z.number().nullish(),
           total_output_tokens: z.number().nullish(),
+          context_window_size: z.number().nullish(),
         })
         .nullish(),
       cost: z.object({ total_cost_usd: z.number().nullish() }).nullish(),