project summaries addition

packages/memory-service/src/summarization/project.js

@@ -0,0 +1,81 @@
+const { SERVICES, getEnv } = require('@nexusai/shared');
+const { 
+    getSessionSummariesForProject,
+    getProjectOverviewSummary,
+    createSummary,
+    updateSummary,
+
+ } = require('./db/summaries');
+
+const EXTRACTION_URL   = getEnv('EXTRACTION_URL', 'http://localhost:11434');
+const EXTRACTION_MODEL = getEnv('EXTRACTION_MODEL', 'qwen2.5:3b');
+
+const MAX_SUMMARY_CHARS = 8000; // generous ceiling before we truncate input
+
+function buildProjectSummaryPrompt(projectName, sessionSummaries) {
+    let summaryBlock = sessionSummaries
+        .map((s, i) => `Session ${i + 1}:\n${s.content}`)
+        .join('\n\n');
+
+    // Guard against very large inputs — truncate oldest sessions if needed
+    if (summaryBlock.length > MAX_SUMMARY_CHARS) {
+        summaryBlock = summaryBlock.slice(-MAX_SUMMARY_CHARS);
+    }
+
+    return [
+        '<|im_start|>user',
+        `The following are session summaries from a project called "${projectName}".`,
+        'Write a project overview covering: goals, progress, key decisions, and current state.',
+        'Scale the length to the material — use multiple paragraphs for complex projects, a few sentences for simple ones.',
+        'Be comprehensive but avoid padding. Do not repeat the same point twice.',
+        'Write in third person. Output only the overview text, no headings or labels.',
+        '',
+    ].join('\n');
+}
+
+async function generateProjectSummary(projectName, sessionSummaries) {
+    const prompt = buildProjectSummaryPrompt(projectName, sessionSummaries);
+
+    const res = await fetch(`${EXTRACTION_URL}/api/generate`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+            model: EXTRACTION_MODEL,
+            prompt,
+            stream: false,
+            // No format: 'json' — we want free-text narrative, same as session summarization
+            options: { temperature: 0.2, num_predict: 1200 },
+        }),
+    });
+
+    if (!res.ok) throw new Error(`Ollama responded ${res.status}`);
+    const data = await res.json();
+
+    const raw = data.response?.trim() ?? '';
+    return raw
+        .replace(/<\|im_start\|>.*?<\|im_end\|>/gs, '')
+        .replace(/<\|im_start\|>|<\|im_end\|>|<\|im_sep\|>/g, '')
+        .trim();
+}
+
+// Main entry point — called by the route handler
+async function generateAndStoreProjectSummary(projectId) {
+    const project = getProject(projectId);
+    if (!project) throw new Error('Project not found');
+
+    const sessionSummaries = getSessionSummariesForProject(projectId);
+    if (!sessionSummaries.length) throw new Error('No session summaries available to summarize');
+
+    const content = await generateProjectSummary(project.name, sessionSummaries);
+    if (!content) throw new Error('Model returned empty summary');
+
+    // Upsert — replace existing overview if present, otherwise create fresh
+    const existing = getProjectOverviewSummary(projectId);
+    if (existing) {
+        return updateSummary(existing.id, { content, tokenCount: null, episodeRange: null });
+    } else {
+        return createSummary({ projectId, content, sessionId: null });
+    }
+}
+
+module.exports = { generateAndStoreProjectSummary };