[claude] Context injection — pass conversation history to work model (#39) (#78)

artifacts/api-server/src/routes/sessions.ts

@@ -1,6 +1,6 @@
 import { Router, type Request, type Response } from "express";
 import { randomBytes, randomUUID, createHash } from "crypto";
-import { db, sessions, sessionRequests, type Session } from "@workspace/db";
+import { db, sessions, sessionRequests, sessionMessages, getSessionHistory, type Session } from "@workspace/db";
 import { eq, and } from "drizzle-orm";
 import { lnbitsService } from "../lib/lnbits.js";
 import { sessionsLimiter } from "../lib/rate-limiter.js";
@@ -312,6 +312,9 @@ router.post("/sessions/:id/request", async (req: Request, res: Response) => {
     const requestId = randomUUID();
     const btcPriceUsd = await getBtcPriceUsd();
 
+    // Load conversation history for context injection
+    const history = await getSessionHistory(id, 8, 4000);
+
     // Eval phase
     const evalResult = await agentService.evaluateRequest(requestText);
     const evalCostUsd = pricingService.calculateActualCostUsd(
@@ -343,7 +346,7 @@ router.post("/sessions/:id/request", async (req: Request, res: Response) => {
 
     if (evalResult.accepted) {
       try {
-        const workResult = await agentService.executeWork(requestText);
+        const workResult = await agentService.executeWork(requestText, history);
         workInputTokens = workResult.inputTokens;
         workOutputTokens = workResult.outputTokens;
         workCostUsd = pricingService.calculateActualCostUsd(
@@ -452,6 +455,14 @@ router.post("/sessions/:id/request", async (req: Request, res: Response) => {
           updatedAt: new Date(),
         })
         .where(eq(sessions.id, id));
+
+      // Persist conversation history only for completed requests
+      if (finalState === "complete") {
+        await tx.insert(sessionMessages).values([
+          { sessionId: id, role: "user" as const, content: requestText, tokenCount: Math.ceil(requestText.length / 4) },
+          { sessionId: id, role: "assistant" as const, content: result ?? "", tokenCount: Math.ceil((result ?? "").length / 4) },
+        ]);
+      }
     });
 
     // ── Trust scoring ────────────────────────────────────────────────────────