feat: optimize heartbeat token usage

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/adapters/pi-local/src/server/execute.ts

@@ -9,6 +9,7 @@ import {
   asStringArray,
   parseObject,
   buildPaperclipEnv,
+  joinPromptSections,
   redactEnvForLogs,
   ensureAbsoluteDirectory,
   ensureCommandResolvable,
@@ -270,7 +271,8 @@ export async function execute(ctx: AdapterExecutionContext): Promise<AdapterExec
     systemPromptExtension = promptTemplate;
   }
 
-  const renderedSystemPromptExtension = renderTemplate(systemPromptExtension, {
+  const bootstrapPromptTemplate = asString(config.bootstrapPromptTemplate, "");
+  const templateData = {
     agentId: agent.id,
     companyId: agent.companyId,
     runId,
@@ -278,18 +280,26 @@ export async function execute(ctx: AdapterExecutionContext): Promise<AdapterExec
     agent,
     run: { id: runId, source: "on_demand" },
     context,
-  });
-
-  // User prompt is simple - just the rendered prompt template without instructions
-  const userPrompt = renderTemplate(promptTemplate, {
-    agentId: agent.id,
-    companyId: agent.companyId,
-    runId,
-    company: { id: agent.companyId },
-    agent,
-    run: { id: runId, source: "on_demand" },
-    context,
-  });
+  };
+  const renderedSystemPromptExtension = renderTemplate(systemPromptExtension, templateData);
+  const renderedHeartbeatPrompt = renderTemplate(promptTemplate, templateData);
+  const renderedBootstrapPrompt =
+    !canResumeSession && bootstrapPromptTemplate.trim().length > 0
+      ? renderTemplate(bootstrapPromptTemplate, templateData).trim()
+      : "";
+  const sessionHandoffNote = asString(context.paperclipSessionHandoffMarkdown, "").trim();
+  const userPrompt = joinPromptSections([
+    renderedBootstrapPrompt,
+    sessionHandoffNote,
+    renderedHeartbeatPrompt,
+  ]);
+  const promptMetrics = {
+    systemPromptChars: renderedSystemPromptExtension.length,
+    promptChars: userPrompt.length,
+    bootstrapPromptChars: renderedBootstrapPrompt.length,
+    sessionHandoffChars: sessionHandoffNote.length,
+    heartbeatPromptChars: renderedHeartbeatPrompt.length,
+  };
 
   const commandNotes = (() => {
     if (!resolvedInstructionsFilePath) return [] as string[];
@@ -345,6 +355,7 @@ export async function execute(ctx: AdapterExecutionContext): Promise<AdapterExec
         commandArgs: args,
         env: redactEnvForLogs(env),
         prompt: userPrompt,
+        promptMetrics,
         context,
       });
     }