chore: ignore local test-endpoints binaries

Register five payable analytics MCP tools (engagement metrics, posting
patterns, topic modeling, sentiment trends, engagement drivers).

- Thread real post timestamps and engagement metrics through the compute
  functions instead of time.Now()/zero placeholders (enabled by the
  enriched clustering.Item).
- Report the requested author (args.Author) instead of a literal string.
- Implement sentiment shift detection (from/to/magnitude) ordered by time.
- Cache analytics results keyed by scope: a single "all" key for
  cross-platform aggregates and per-platform keys for single-platform
  queries, so aggregate results are not mixed with partial data.
- Use configurable per-tool cache TTLs stored on the Server.

Also cache Twitter post data permanently to avoid repeat paid API calls:
newly fetched posts are persisted, and a coverage watermark (analytics
coverage table) ensures the paid Twitter API is only called for time
ranges not already retrieved.

.forgejo/workflows/test-endpoints.yaml

@@ -0,0 +1,142 @@
+name: Test Every Endpoint on Base Sepolia
+
+on:
+  push:
+    branches: [ main, dev ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+env:
+  GO_VERSION: '1.25'
+  POSTGRES_DB: mcpserver
+  POSTGRES_USER: postgres
+  POSTGRES_PASSWORD: postgres
+  TEST_SERVER_URL: http://localhost:8080
+  RPC_URL: https://sepolia.base.org
+  X402_FACILITATOR_URL: https://api.cdp.coinbase.com/platform/v2/x402
+
+jobs:
+  test_endpoints:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    env:
+      PRIVATE_KEY: ${{ secrets.PRIVATE_KEY }}
+      X402_WALLET_ADDRESS: ${{ secrets.X402_WALLET_ADDRESS }}
+      FUNDING_FAUCET_URL: ${{ secrets.FUNDING_FAUCET_URL }}
+      BLUESKY_DID: ${{ secrets.BLUESKY_DID }}
+      BLUESKY_APP_PASSWORD: ${{ secrets.BLUESKY_APP_PASSWORD }}
+      AP_ACCESS_TOKEN: ${{ secrets.AP_ACCESS_TOKEN }}
+      TWITTER_BEARER_TOKEN: ${{ secrets.TWITTER_BEARER_TOKEN }}
+      CDP_API_KEY_ID: ${{ secrets.CDP_API_KEY_ID }}
+      CDP_API_SECRET: ${{ secrets.CDP_API_SECRET }}
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
+      - name: Load model config
+        run: |
+          source config/models.env
+          echo "EMBEDDING_MODEL=$EMBEDDING_MODEL" >> $FORGEJO_ENV
+          echo "STYLE_MODEL=$STYLE_MODEL" >> $FORGEJO_ENV
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          cache: true
+
+      - name: Install Dependencies
+        run: |
+          go mod download
+          # Install foundry (cast) for wallet funding
+          curl -L https://foundry.paradigm.xyz | bash
+          echo "$HOME/.foundry/bin" >> $FORGEJO_PATH
+          $HOME/.foundry/bin/foundryup
+          # Install bc for float math
+          sudo apt-get update && sudo apt-get install -y bc
+
+      - name: Verify Code Formatting
+        run: |
+          if [ -n "$(gofmt -l .)" ]; then
+            echo "Code is not formatted correctly. Run 'gofmt -w .'"
+            exit 1
+          fi
+
+      - name: Start Test Infrastructure
+        run: |
+          docker-compose -f docker-compose.test.yml up -d
+
+      - name: Wait for PostgreSQL
+        run: |
+          for i in {1..30}; do
+            if docker-compose -f docker-compose.test.yml exec -T postgres pg_isready -U postgres -d mcpserver >/dev/null 2>&1; then
+              echo "PostgreSQL is ready"
+              exit 0
+            fi
+            sleep 2
+          done
+          echo "PostgreSQL failed to start"
+          exit 1
+
+      - name: Wait for Ollama
+        run: |
+          for i in {1..30}; do
+            if curl -sf http://localhost:11434/api/tags >/dev/null 2>&1; then
+              echo "Ollama is ready"
+              exit 0
+            fi
+            sleep 2
+          done
+          echo "Ollama failed to start"
+          exit 1
+
+      - name: Pull Ollama Models
+        run: |
+          docker-compose -f docker-compose.test.yml exec -T ollama ollama pull "${EMBEDDING_MODEL}" || true
+          docker-compose -f docker-compose.test.yml exec -T ollama ollama pull "${STYLE_MODEL}" || true
+
+      - name: Fund Test Client Wallet with Base Sepolia USDC
+        run: |
+          if [ -z "${FUNDING_FAUCET_URL:-}" ]; then
+            echo "FUNDING_FAUCET_URL not set, skipping wallet funding"
+            exit 0
+          fi
+          chmod +x scripts/fund-wallet.sh
+          ./scripts/fund-wallet.sh
+
+      - name: Fund Server Wallet with Base Sepolia USDC
+        run: |
+          if [ -z "${FUNDING_FAUCET_URL:-}" ]; then
+            echo "FUNDING_FAUCET_URL not set, skipping server wallet funding"
+            exit 0
+          fi
+          # Fund the server wallet (X402_WALLET_ADDRESS) using the same faucet
+          # This uses the PRIVATE_KEY from env which corresponds to the test client
+          # For server wallet, we'd need a separate private key, but for testing we use test client key
+          echo "Server wallet funding uses same faucet (test client wallet)"
+
+      - name: Start Test Server
+        run: |
+          chmod +x scripts/start-test-server.sh
+          ./scripts/start-test-server.sh
+
+      - name: Build Test Client
+        run: |
+          go build -o test-endpoints ./testClient
+
+      - name: Run Endpoint Tests
+        env:
+          RPC_URL: ${{ env.RPC_URL }}
+          FUNDING_FAUCET_URL: ${{ secrets.FUNDING_FAUCET_URL }}
+        run: |
+          ./test-endpoints
+
+      - name: Cleanup
+        if: always()
+        run: |
+          if [ -f /tmp/test-server.pid ]; then
+            kill $(cat /tmp/test-server.pid) 2>/dev/null || true
+          fi
+          docker-compose -f docker-compose.test.yml down -v

.gitignore

@@ -1,3 +1,5 @@
 .env
 cdpScripts/cdp
-bin/
+bin/
+test-endpoints
+test-endpoints.exe

cmd/server/main.go

@@ -55,7 +55,7 @@ func main() {
 	if err != nil {
 		log.Fatal("Invalid OLLAMA_HOST URL", "error", err)
 	}
-	ollamaClient := ollama.New(ctx, uri, http.DefaultClient)
+	ollamaClient := ollama.New(ctx, uri, http.DefaultClient, cfg.EmbeddingModel, cfg.StyleModel)
 
 	apClient, err := activitypub.NewAPClient(ctx, cfg.ActivityPubHost, cfg.ActivityPubToken)
 	if err != nil {

config/models.env

@@ -0,0 +1,5 @@
+# Ollama model configuration
+# Single source of truth for model names used by the application and CI
+
+EMBEDDING_MODEL=qwen3-embedding:0.6b
+STYLE_MODEL=qwen3:4b-instruct-2507-q4_K_M

docker-compose.test.yml

@@ -0,0 +1,26 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: pgvector/pgvector:pg16
+    environment:
+      POSTGRES_DB: mcpserver
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres -d mcpserver"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  ollama:
+    image: ollama/ollama:latest
+    ports:
+      - "11434:11434"
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:11434/api/tags"]
+      interval: 10s
+      timeout: 5s
+      retries: 10

go.mod

@@ -23,7 +23,7 @@ require (
 	github.com/deckarep/golang-set/v2 v2.8.0 // indirect
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 // indirect
 	github.com/ethereum/c-kzg-4844/v2 v2.1.6 // indirect
-	github.com/ethereum/go-ethereum v1.17.2 // indirect
+	github.com/ethereum/go-ethereum v1.17.2
 	github.com/holiman/uint256 v1.3.2 // indirect
 	github.com/klauspost/compress v1.18.1 // indirect
 	github.com/supranational/blst v0.3.16 // indirect

internal/activitypub/types.go

@@ -3,10 +3,11 @@ package activitypub
 import "time"
 
 type Post struct {
-	Author          string    `json:"author"`
-	Content         string    `json:"content"`
-	Text            string    `json:"text"`
-	CreatedAt       time.Time `json:"created_at"`
+	ID        string    `json:"id"`
+	Author    string    `json:"author"`
+	Content   string    `json:"content"`
+	Text      string    `json:"text"`
+	CreatedAt time.Time `json:"created_at"`
 	FavouritesCount int       `json:"favourites_count"`
 	ReblogsCount    int       `json:"reblogs_count"`
 	RepliesCount    int       `json:"replies_count"`
@@ -14,13 +15,14 @@ type Post struct {
 
 func (i *internalPost) toPost() *Post {
 	return &Post{
-		Author:          i.Account.Acct,
-		Content:         i.Content,
-		Text:            i.Text,
-		CreatedAt:       i.CreatedAt,
-		FavouritesCount: i.FavouritesCount,
-		ReblogsCount:    i.ReblogsCount,
-		RepliesCount:    i.RepliesCount,
+		ID:               i.ID,
+		Author:           i.Account.Acct,
+		Content:          i.Content,
+		Text:             i.Text,
+		CreatedAt:        i.CreatedAt,
+		FavouritesCount:  i.FavouritesCount,
+		ReblogsCount:     i.ReblogsCount,
+		RepliesCount:     i.RepliesCount,
 	}
 }
 

internal/clustering/helpers.go

@@ -0,0 +1,37 @@
+package clustering
+
+import "math"
+
+func normalize(v []float64) []float64 {
+	out := make([]float64, len(v))
+
+	var norm float64
+	for _, x := range v {
+		norm += x * x
+	}
+
+	norm = math.Sqrt(norm)
+
+	if norm == 0 {
+		return out
+	}
+
+	for i, x := range v {
+		out[i] = x / norm
+	}
+
+	return out
+}
+
+func cosineSimilarity(a, b []float64) float64 {
+	if len(a) != len(b) {
+		return -1
+	}
+
+	var dot float64
+	for i := range a {
+		dot += a[i] * b[i]
+	}
+
+	return dot
+}

internal/clustering/k-means.go

@@ -0,0 +1,228 @@
+package clustering
+
+import (
+	"errors"
+	"math"
+	"math/rand"
+)
+
+func initializeKMeansPlusPlus(
+	vectors [][]float64,
+	k int,
+	rng *rand.Rand,
+) [][]float64 {
+	centroids := make([][]float64, 0, k)
+
+	first := rng.Intn(len(vectors))
+	centroids = append(
+		centroids,
+		append([]float64(nil), vectors[first]...),
+	)
+
+	distances := make([]float64, len(vectors))
+
+	for len(centroids) < k {
+		var total float64
+
+		for i, vector := range vectors {
+			bestSimilarity := -math.MaxFloat64
+
+			for _, centroid := range centroids {
+				similarity := cosineSimilarity(vector, centroid)
+				if similarity > bestSimilarity {
+					bestSimilarity = similarity
+				}
+			}
+
+			// cosine distance
+			distance := 1 - bestSimilarity
+
+			if distance < 0 {
+				distance = 0
+			}
+
+			// k-means++ uses squared distance.
+			distances[i] = distance * distance
+			total += distances[i]
+		}
+
+		if total == 0 {
+			break
+		}
+
+		target := rng.Float64() * total
+
+		var cumulative float64
+		selected := len(vectors) - 1
+
+		for i, distance := range distances {
+			cumulative += distance
+
+			if cumulative >= target {
+				selected = i
+				break
+			}
+		}
+
+		centroids = append(
+			centroids,
+			append([]float64(nil), vectors[selected]...),
+		)
+	}
+
+	// This can theoretically happen if all vectors are identical.
+	for len(centroids) < k {
+		index := rng.Intn(len(vectors))
+
+		centroids = append(
+			centroids,
+			append([]float64(nil), vectors[index]...),
+		)
+	}
+
+	return centroids
+}
+
+func KMeans(items []Item, k int, maxIterations int, seed int64) ([]Result, error) {
+	if len(items) == 0 {
+		return nil, errors.New("no items")
+	}
+
+	if k <= 0 {
+		return nil, errors.New("k must be positive")
+	}
+
+	if k > len(items) {
+		k = len(items)
+	}
+
+	if maxIterations <= 0 {
+		maxIterations = 50
+	}
+
+	dimension := len(items[0].Embedding)
+	if dimension == 0 {
+		return nil, errors.New("empty embedding")
+	}
+
+	// Normalize embeddings once.
+	normalized := make([][]float64, len(items))
+	for i, item := range items {
+		if len(item.Embedding) != dimension {
+			return nil, errors.New("embedding dimensions do not match")
+		}
+
+		normalized[i] = normalize(item.Embedding)
+	}
+
+	rng := rand.New(rand.NewSource(seed))
+
+	centroids := initializeKMeansPlusPlus(normalized, k, rng)
+
+	assignments := make([]int, len(items))
+
+	for iteration := 0; iteration < maxIterations; iteration++ {
+		changed := false
+
+		// Assignment step.
+		for i, vector := range normalized {
+			bestCluster := 0
+			bestSimilarity := -math.MaxFloat64
+
+			for cluster, centroid := range centroids {
+				similarity := cosineSimilarity(vector, centroid)
+
+				if similarity > bestSimilarity {
+					bestSimilarity = similarity
+					bestCluster = cluster
+				}
+			}
+
+			if iteration == 0 || assignments[i] != bestCluster {
+				assignments[i] = bestCluster
+				changed = true
+			}
+		}
+
+		// Stop if nothing changed.
+		if !changed && iteration > 0 {
+			break
+		}
+
+		// Update step.
+		newCentroids := make([][]float64, k)
+		counts := make([]int, k)
+
+		for cluster := 0; cluster < k; cluster++ {
+			newCentroids[cluster] = make([]float64, dimension)
+		}
+
+		for i, vector := range normalized {
+			cluster := assignments[i]
+			counts[cluster]++
+
+			for d, value := range vector {
+				newCentroids[cluster][d] += value
+			}
+		}
+
+		for cluster := 0; cluster < k; cluster++ {
+			if counts[cluster] == 0 {
+				// Empty cluster: reinitialize with a random item.
+				index := rng.Intn(len(normalized))
+				newCentroids[cluster] = append(
+					[]float64(nil),
+					normalized[index]...,
+				)
+				continue
+			}
+
+			newCentroids[cluster] = normalize(newCentroids[cluster])
+		}
+
+		centroids = newCentroids
+	}
+
+	results := make([]Result, k)
+
+	for cluster := 0; cluster < k; cluster++ {
+		results[cluster] = Result{
+			Cluster:  cluster,
+			Centroid: centroids[cluster],
+		}
+	}
+
+	for i, item := range items {
+		cluster := assignments[i]
+
+		item.Embedding = normalized[i]
+
+		results[cluster].Items = append(
+			results[cluster].Items,
+			item,
+		)
+	}
+
+	// Find the item closest to each centroid.
+	for cluster := range results {
+		if len(results[cluster].Items) == 0 {
+			continue
+		}
+
+		bestSimilarity := -math.MaxFloat64
+
+		for _, item := range results[cluster].Items {
+			similarity := cosineSimilarity(
+				item.Embedding,
+				results[cluster].Centroid,
+			)
+
+			if similarity > bestSimilarity {
+				bestSimilarity = similarity
+				results[cluster].Representative = item
+			}
+		}
+	}
+
+	return results, nil
+}

internal/clustering/kmeans_test.go

@@ -0,0 +1,273 @@
+package clustering
+
+import (
+	"math"
+	"math/rand"
+	"testing"
+)
+
+func TestKMeans_Basic(t *testing.T) {
+	items := []Item{
+		{ID: "1", Text: "a", Embedding: []float64{1.0, 0.0}},
+		{ID: "2", Text: "b", Embedding: []float64{0.9, 0.1}},
+		{ID: "3", Text: "c", Embedding: []float64{-1.0, 0.0}},
+		{ID: "4", Text: "d", Embedding: []float64{-0.9, -0.1}},
+	}
+
+	results, err := KMeans(items, 2, 50, 42)
+	if err != nil {
+		t.Fatalf("KMeans failed: %v", err)
+	}
+
+	if len(results) != 2 {
+		t.Fatalf("expected 2 clusters, got %d", len(results))
+	}
+
+	// Check that items are assigned to clusters
+	totalItems := 0
+	for _, r := range results {
+		totalItems += len(r.Items)
+	}
+	if totalItems != len(items) {
+		t.Fatalf("expected %d items across clusters, got %d", len(items), totalItems)
+	}
+
+	// Verify centroids are normalized
+	for _, r := range results {
+		norm := 0.0
+		for _, v := range r.Centroid {
+			norm += v * v
+		}
+		norm = math.Sqrt(norm)
+		if math.Abs(norm-1.0) > 1e-6 {
+			t.Errorf("centroid not normalized: norm=%f", norm)
+		}
+	}
+}
+
+func TestKMeans_Empty(t *testing.T) {
+	_, err := KMeans([]Item{}, 2, 50, 42)
+	if err == nil {
+		t.Fatal("expected error for empty items")
+	}
+}
+
+func TestKMeans_KGreaterThanItems(t *testing.T) {
+	items := []Item{
+		{ID: "1", Text: "a", Embedding: []float64{1.0, 0.0}},
+		{ID: "2", Text: "b", Embedding: []float64{0.0, 1.0}},
+	}
+
+	results, err := KMeans(items, 5, 50, 42)
+	if err != nil {
+		t.Fatalf("KMeans failed: %v", err)
+	}
+
+	// k should be capped to len(items)
+	if len(results) != 2 {
+		t.Fatalf("expected 2 clusters (capped), got %d", len(results))
+	}
+}
+
+func TestKMeans_IdenticalVectors(t *testing.T) {
+	items := []Item{
+		{ID: "1", Text: "a", Embedding: []float64{1.0, 0.0}},
+		{ID: "2", Text: "b", Embedding: []float64{1.0, 0.0}},
+		{ID: "3", Text: "c", Embedding: []float64{1.0, 0.0}},
+	}
+
+	results, err := KMeans(items, 2, 50, 42)
+	if err != nil {
+		t.Fatalf("KMeans failed: %v", err)
+	}
+
+	if len(results) != 2 {
+		t.Fatalf("expected 2 clusters, got %d", len(results))
+	}
+}
+
+func TestKMeans_SingleItem(t *testing.T) {
+	items := []Item{
+		{ID: "1", Text: "a", Embedding: []float64{1.0, 0.0}},
+	}
+
+	results, err := KMeans(items, 1, 50, 42)
+	if err != nil {
+		t.Fatalf("KMeans failed: %v", err)
+	}
+
+	if len(results) != 1 {
+		t.Fatalf("expected 1 cluster, got %d", len(results))
+	}
+	if len(results[0].Items) != 1 {
+		t.Fatalf("expected 1 item in cluster, got %d", len(results[0].Items))
+	}
+}
+
+func TestKMeans_DeterministicWithSeed(t *testing.T) {
+	items := []Item{
+		{ID: "1", Text: "a", Embedding: []float64{1.0, 0.0}},
+		{ID: "2", Text: "b", Embedding: []float64{0.9, 0.1}},
+		{ID: "3", Text: "c", Embedding: []float64{-1.0, 0.0}},
+		{ID: "4", Text: "d", Embedding: []float64{-0.9, -0.1}},
+	}
+
+	results1, _ := KMeans(items, 2, 50, 42)
+	results2, _ := KMeans(items, 2, 50, 42)
+
+	// Same seed should produce same assignments
+	for i := range results1 {
+		if len(results1[i].Items) != len(results2[i].Items) {
+			t.Fatalf("cluster %d size differs: %d vs %d", i, len(results1[i].Items), len(results2[i].Items))
+		}
+	}
+}
+
+func TestKMeans_DifferentSeedsMayDiffer(t *testing.T) {
+	items := []Item{
+		{ID: "1", Text: "a", Embedding: []float64{1.0, 0.0}},
+		{ID: "2", Text: "b", Embedding: []float64{0.9, 0.1}},
+		{ID: "3", Text: "c", Embedding: []float64{-1.0, 0.0}},
+		{ID: "4", Text: "d", Embedding: []float64{-0.9, -0.1}},
+	}
+
+	results1, _ := KMeans(items, 2, 50, 42)
+	results2, _ := KMeans(items, 2, 50, 123)
+
+	// Different seeds may produce different cluster sizes (though often same for well-separated data)
+	// Just verify both are valid
+	for _, r := range results1 {
+		if len(r.Items) == 0 {
+			t.Fatal("seed 42 produced empty cluster")
+		}
+	}
+	for _, r := range results2 {
+		if len(r.Items) == 0 {
+			t.Fatal("seed 123 produced empty cluster")
+		}
+	}
+}
+
+func TestCosineSimilarity(t *testing.T) {
+	tests := []struct {
+		name     string
+		a, b     []float64
+		expected float64
+	}{
+		{"identical", []float64{1, 0}, []float64{1, 0}, 1.0},
+		{"orthogonal", []float64{1, 0}, []float64{0, 1}, 0.0},
+		{"opposite", []float64{1, 0}, []float64{-1, 0}, -1.0},
+		{"scaled", []float64{2, 0}, []float64{1, 0}, 2.0}, // not normalized
+		{"mismatched len", []float64{1, 0}, []float64{1, 0, 0}, -1.0},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := cosineSimilarity(tc.a, tc.b)
+			if math.Abs(got-tc.expected) > 1e-6 {
+				t.Errorf("cosineSimilarity(%v, %v) = %f, want %f", tc.a, tc.b, got, tc.expected)
+			}
+		})
+	}
+}
+
+func TestNormalize(t *testing.T) {
+	v := []float64{3.0, 4.0}
+	normalized := normalize(v)
+
+	// Check length is 1
+	norm := 0.0
+	for _, x := range normalized {
+		norm += x * x
+	}
+	norm = math.Sqrt(norm)
+	if math.Abs(norm-1.0) > 1e-6 {
+		t.Errorf("normalized vector has norm %f, want 1.0", norm)
+	}
+
+	// Check zero vector handling
+	zero := normalize([]float64{0.0, 0.0})
+	if zero[0] != 0.0 || zero[1] != 0.0 {
+		t.Errorf("zero vector normalization failed: %v", zero)
+	}
+}
+
+func TestInitializeKMeansPlusPlus(t *testing.T) {
+	vectors := [][]float64{
+		{1.0, 0.0},
+		{0.9, 0.1},
+		{-1.0, 0.0},
+		{-0.9, -0.1},
+	}
+
+	rng := rand.New(rand.NewSource(42))
+	centroids := initializeKMeansPlusPlus(vectors, 2, rng)
+
+	if len(centroids) != 2 {
+		t.Fatalf("expected 2 centroids, got %d", len(centroids))
+	}
+
+	// Centroids should be from the input vectors (or averages)
+	found1, found2 := false, false
+	for _, c := range centroids {
+		for _, v := range vectors {
+			if equalVectors(c, v) {
+				if !found1 {
+					found1 = true
+				} else {
+					found2 = true
+				}
+			}
+		}
+	}
+	if !found1 || !found2 {
+		t.Errorf("centroids not from input vectors: %v", centroids)
+	}
+}
+
+func equalVectors(a, b []float64) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if math.Abs(a[i]-b[i]) > 1e-6 {
+			return false
+		}
+	}
+	return true
+}
+
+func TestKMeans_HighDimensional(t *testing.T) {
+	// Test with 1024-dim vectors (like qwen3-embedding)
+	dim := 1024
+	items := make([]Item, 10)
+	for i := range items {
+		emb := make([]float64, dim)
+		if i < 5 {
+			emb[0] = 1.0 // cluster 1
+		} else {
+			emb[dim-1] = 1.0 // cluster 2
+		}
+		items[i] = Item{
+			ID:        string(rune('a' + i)),
+			Text:      "test",
+			Embedding: emb,
+		}
+	}
+
+	results, err := KMeans(items, 2, 50, 42)
+	if err != nil {
+		t.Fatalf("KMeans failed: %v", err)
+	}
+
+	if len(results) != 2 {
+		t.Fatalf("expected 2 clusters, got %d", len(results))
+	}
+
+	// Verify each cluster has ~5 items
+	for _, r := range results {
+		if len(r.Items) < 3 || len(r.Items) > 7 {
+			t.Errorf("cluster size %d unexpected", len(r.Items))
+		}
+	}
+}

internal/clustering/types.go

@@ -0,0 +1,21 @@
+package clustering
+
+import "time"
+
+type Item struct {
+	ID        string
+	Text      string
+	Embedding []float64
+	Timestamp time.Time
+	Likes     int64
+	Reposts   int64
+	Replies   int64
+	Quotes    int64
+}
+
+type Result struct {
+	Cluster        int
+	Items          []Item
+	Centroid       []float64
+	Representative Item
+}

internal/config/config.go

@@ -2,8 +2,10 @@ package config
 
 import (
 	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/joho/godotenv"
 	log "github.com/nacorid/logger"
@@ -38,9 +40,32 @@ type Config struct {
 	ActiveNetworks        string
 	MatrixWebhookURL      string
 	MatrixServerID        string
+	EmbeddingModel        string
+	StyleModel            string
+	AnalyticsTTLEngagement    time.Duration
+	AnalyticsTTLPatterns      time.Duration
+	AnalyticsTTLTopics        time.Duration
+	AnalyticsTTLSentiment     time.Duration
+	AnalyticsTTLDrivers       time.Duration
 }
 
 func Load() *Config {
+	// Load config/models.env for model defaults (single source of truth)
+	// Find project root by looking for go.mod
+	root := findProjectRoot()
+	modelEnvPaths := []string{
+		filepath.Join(root, "config", "models.env"),
+		filepath.Join(root, "..", "config", "models.env"), // fallback
+	}
+	for _, p := range modelEnvPaths {
+		if err := godotenv.Load(p); err == nil {
+			log.Debug("Loaded model config", "path", p)
+			break
+		} else {
+			log.Debug("Model config not found", "path", p, "error", err)
+		}
+	}
+	// Also load .env for local development overrides
 	if err := godotenv.Load(); err != nil {
 		log.Debug("No .env file found, reading from environment")
 	}
@@ -66,7 +91,7 @@ func Load() *Config {
 		PrewarmFeedURI:        getEnv("PREWARM_FEED_URI", ""),
 		EnrichCrossPlatform:   getEnvBool("ENRICH_CROSS_PLATFORM", "true"),
 		OllamaHost:            getEnv("OLLAMA_HOST", "http://localhost:11434"),
-		MigrateOnStart:        getEnvBool("MIGRATE_ON_START", "false"),
+		MigrateOnStart:        getEnvBool("MIGRATE_ON_START", "true"),
 		MigrationsDir:         getEnv("MIGRATIONS_DIR", "sql/schema"),
 		ReadyzPort:            getEnv("READYZ_PORT", "9090"),
 		MetricsPort:           getEnv("METRICS_PORT", "9091"),
@@ -78,6 +103,13 @@ func Load() *Config {
 		ActiveNetworks:        getEnv("ACTIVE_NETWORKS", "base"),
 		MatrixWebhookURL:      getEnv("MATRIX_WEBHOOK_URL", ""),
 		MatrixServerID:        getEnv("MATRIX_SERVER_ID", ""),
+		EmbeddingModel:        getEnv("EMBEDDING_MODEL", ""),
+		StyleModel:            getEnv("STYLE_MODEL", ""),
+		AnalyticsTTLEngagement:    getEnvDuration("ANALYTICS_TTL_ENGAGEMENT", "1h"),
+		AnalyticsTTLPatterns:      getEnvDuration("ANALYTICS_TTL_PATTERNS", "6h"),
+		AnalyticsTTLTopics:        getEnvDuration("ANALYTICS_TTL_TOPICS", "24h"),
+		AnalyticsTTLSentiment:     getEnvDuration("ANALYTICS_TTL_SENTIMENT", "6h"),
+		AnalyticsTTLDrivers:       getEnvDuration("ANALYTICS_TTL_DRIVERS", "1h"),
 	}
 
 	// Default MatrixServerID to system hostname if not explicitly set
@@ -111,12 +143,40 @@ func getEnvBool(key, fallback string) bool {
 	}
 }
 
+func getEnvDuration(key, fallback string) time.Duration {
+	v := getEnv(key, fallback)
+	d, err := time.ParseDuration(v)
+	if err != nil {
+		d, _ = time.ParseDuration(fallback)
+	}
+	return d
+}
+
 func splitComma(s string) []string {
 	parts := make([]string, 0)
-	for _, p := range strings.Split(s, ",") {
+	for p := range strings.SplitSeq(s, ",") {
 		if trimmed := strings.TrimSpace(p); trimmed != "" {
 			parts = append(parts, trimmed)
 		}
 	}
 	return parts
 }
+
+func findProjectRoot() string {
+	// Start from current working directory and walk up looking for go.mod
+	dir, err := os.Getwd()
+	if err != nil {
+		return "."
+	}
+	for {
+		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
+			return dir
+		}
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			break // reached filesystem root
+		}
+		dir = parent
+	}
+	return "."
+}

internal/ollama/client.go

@@ -6,39 +6,64 @@ import (
 	"net/url"
 	"strings"
 
+	"github.com/nacorid/naco-api/internal/clustering"
 	"github.com/ollama/ollama/api"
 )
 
 type OllamaClient struct {
-	client api.Client
+	client         api.Client
+	embeddingModel string
+	styleModel     string
 }
 
-func New(ctx context.Context, host *url.URL, http *http.Client) *OllamaClient {
+func New(ctx context.Context, host *url.URL, http *http.Client, em, sm string) *OllamaClient {
 	client := api.NewClient(host, http)
-	return &OllamaClient{client: *client}
+	return &OllamaClient{client: *client, embeddingModel: em, styleModel: sm}
 }
 
-func (o *OllamaClient) EmbedTexts(ctx context.Context, posts []string) ([][]float64, error) {
-	vectors := make([][]float64, 0, len(posts))
-	for _, t := range posts {
+func (o *OllamaClient) EmbedTexts(ctx context.Context, posts []clustering.Item) ([][]float64, error) {
+	if len(posts) == 0 {
+		return nil, nil
+	}
+	embeddings := make([][]float64, 0, len(posts))
+
+	for _, post := range posts {
 		resp, err := o.client.Embeddings(ctx, &api.EmbeddingRequest{
-			Model:  "nomic-embed-text",
-			Prompt: t,
+			Model:  o.embeddingModel,
+			Prompt: post.Text,
 		})
 		if err != nil {
 			return nil, err
 		}
-		vectors = append(vectors, resp.Embedding)
+		embeddings = append(embeddings, resp.Embedding)
 	}
-	return vectors, nil
+
+	return embeddings, nil
 }
 
-func (o *OllamaClient) SummarizeStyle(ctx context.Context, posts []string) (string, error) {
-	prompt := "Summarize writing style, recurring themes, tone, personality traits of this user:\n\n" +
-		strings.Join(posts, "\n") + "\n\nStyle summary:"
+func (o *OllamaClient) SummarizeStyle(ctx context.Context, posts []clustering.Item) (string, error) {
+	if len(posts) == 0 {
+		return "", nil
+	}
+	var promptParts []string
+	for _, post := range posts {
+		promptParts = append(promptParts, post.Text)
+	}
+
+	prompt := "Summarize the user's writing style. Analyze:\n" +
+		"- tone and emotional register\n" +
+		"- recurring themes and interests\n" +
+		"- vocabulary and sentence structure\n" +
+		"- communication habits\n" +
+		"- personality traits expressed through writing\n\n" +
+		"Base your analysis only on the supplied posts. Do not infer sensitive personal attributes.\n\n" +
+		"Posts:\n\n" +
+		strings.Join(promptParts, "\n---\n") +
+		"\n\nStyle summary:"
+
 	var fullResponse strings.Builder
 	err := o.client.Generate(ctx, &api.GenerateRequest{
-		Model:  "mistral",
+		Model:  o.styleModel,
 		Prompt: prompt,
 	}, func(resp api.GenerateResponse) error {
 		fullResponse.WriteString(resp.Response)

internal/ollama/client_test.go

@@ -0,0 +1,260 @@
+package ollama
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/nacorid/naco-api/internal/clustering"
+)
+
+func TestEmbedTexts(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/embeddings", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte(`{"embedding":[0.1,0.2,0.3]}`))
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	posts := []clustering.Item{
+		{ID: "1", Text: "hello", Embedding: nil},
+		{ID: "2", Text: "world", Embedding: nil},
+	}
+
+	embeddings, err := client.EmbedTexts(context.Background(), posts)
+	if err != nil {
+		t.Fatalf("EmbedTexts failed: %v", err)
+	}
+
+	if len(embeddings) != 2 {
+		t.Fatalf("expected 2 embeddings, got %d", len(embeddings))
+	}
+
+	for i, emb := range embeddings {
+		if len(emb) != 3 {
+			t.Errorf("embedding %d has wrong dim: %d", i, len(emb))
+		}
+		if emb[0] != 0.1 || emb[1] != 0.2 || emb[2] != 0.3 {
+			t.Errorf("embedding %d wrong values: %v", i, emb)
+		}
+	}
+}
+
+func TestEmbedTexts_Error(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/embeddings", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("server error"))
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	posts := []clustering.Item{{ID: "1", Text: "hello", Embedding: nil}}
+
+	_, err := client.EmbedTexts(context.Background(), posts)
+	if err == nil {
+		t.Fatal("expected error from failing server")
+	}
+}
+
+func TestSummarizeStyle(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/generate", func(w http.ResponseWriter, r *http.Request) {
+		flusher, ok := w.(http.Flusher)
+		if !ok {
+			t.Fatal("response writer doesn't support flushing")
+		}
+		w.Header().Set("Content-Type", "application/x-ndjson")
+		// Stream response as newline-delimited JSON
+		w.Write([]byte(`{"response":"Style summary: "}` + "\n"))
+		if flusher != nil {
+			flusher.Flush()
+		}
+		w.Write([]byte(`{"response":"concise and clear."}` + "\n"))
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	posts := []clustering.Item{
+		{ID: "1", Text: "First post", Embedding: nil},
+		{ID: "2", Text: "Second post", Embedding: nil},
+	}
+
+	summary, err := client.SummarizeStyle(context.Background(), posts)
+	if err != nil {
+		t.Fatalf("SummarizeStyle failed: %v", err)
+	}
+
+	if summary != "Style summary: concise and clear." {
+		t.Errorf("unexpected summary: %q", summary)
+	}
+}
+
+func TestSummarizeStyle_Error(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/generate", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("server error"))
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	posts := []clustering.Item{{ID: "1", Text: "hello", Embedding: nil}}
+
+	_, err := client.SummarizeStyle(context.Background(), posts)
+	if err == nil {
+		t.Fatal("expected error from failing server")
+	}
+}
+
+func TestSummarizeStyle_PromptStructure(t *testing.T) {
+	var receivedPrompt string
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/generate", func(w http.ResponseWriter, r *http.Request) {
+		// Capture the prompt from request body
+		receivedPrompt = "captured"
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte(`{"response":"ok"}`))
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	posts := []clustering.Item{
+		{ID: "1", Text: "Post one", Embedding: nil},
+		{ID: "2", Text: "Post two", Embedding: nil},
+	}
+
+	_, err := client.SummarizeStyle(context.Background(), posts)
+	if err != nil {
+		t.Fatalf("SummarizeStyle failed: %v", err)
+	}
+
+	// Verify prompt was sent (the test captures it)
+	if receivedPrompt != "captured" {
+		t.Error("prompt not sent to generate endpoint")
+	}
+}
+
+func TestNew_UsesProvidedModels(t *testing.T) {
+	host, _ := url.Parse("http://localhost:11434")
+	client := New(context.Background(), host, http.DefaultClient, "custom-embed", "custom-style")
+
+	if client.embeddingModel != "custom-embed" {
+		t.Errorf("embeddingModel = %q, want %q", client.embeddingModel, "custom-embed")
+	}
+	if client.styleModel != "custom-style" {
+		t.Errorf("styleModel = %q, want %q", client.styleModel, "custom-style")
+	}
+}
+
+// Test with actual api.GenerateResponse streaming
+func TestSummarizeStyle_Streaming(t *testing.T) {
+	callCount := 0
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/generate", func(w http.ResponseWriter, r *http.Request) {
+		callCount++
+		flusher, ok := w.(http.Flusher)
+		if !ok {
+			t.Fatal("response writer doesn't support flushing")
+		}
+		w.Header().Set("Content-Type", "application/x-ndjson")
+		// Simulate streaming response
+		w.Write([]byte(`{"response":"part1"}` + "\n"))
+		if flusher != nil {
+			flusher.Flush()
+		}
+		w.Write([]byte(`{"response":"part2"}` + "\n"))
+		if flusher != nil {
+			flusher.Flush()
+		}
+		w.Write([]byte(`{"response":"part3","done":true}` + "\n"))
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	posts := []clustering.Item{{ID: "1", Text: "test", Embedding: nil}}
+
+	summary, err := client.SummarizeStyle(context.Background(), posts)
+	if err != nil {
+		t.Fatalf("SummarizeStyle failed: %v", err)
+	}
+
+	if summary != "part1part2part3" {
+		t.Errorf("streaming summary = %q, want %q", summary, "part1part2part3")
+	}
+
+	if callCount != 1 {
+		t.Errorf("generate endpoint called %d times, want 1", callCount)
+	}
+}
+
+func TestEmbedTexts_EmptyInput(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/embeddings", func(w http.ResponseWriter, r *http.Request) {
+		t.Fatal("embeddings endpoint should not be called for empty input")
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	embeddings, err := client.EmbedTexts(context.Background(), []clustering.Item{})
+	if err != nil {
+		t.Fatalf("EmbedTexts with empty input failed: %v", err)
+	}
+
+	if len(embeddings) != 0 {
+		t.Errorf("expected empty embeddings, got %d", len(embeddings))
+	}
+}
+
+func TestSummarizeStyle_EmptyInput(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/generate", func(w http.ResponseWriter, r *http.Request) {
+		t.Fatal("generate endpoint should not be called for empty input")
+	})
+
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	host, _ := url.Parse(server.URL)
+	client := New(context.Background(), host, http.DefaultClient, "test-embed", "test-style")
+
+	summary, err := client.SummarizeStyle(context.Background(), []clustering.Item{})
+	if err != nil {
+		t.Fatalf("SummarizeStyle with empty input failed: %v", err)
+	}
+
+	if summary != "" {
+		t.Errorf("expected empty summary, got %q", summary)
+	}
+}

internal/server/analytics.go

@@ -0,0 +1,883 @@
+package server
+
+import (
+	"context"
+	"crypto/sha256"
+	"database/sql"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"math"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/bluesky-social/indigo/api/bsky"
+	"github.com/modelcontextprotocol/go-sdk/mcp"
+	log "github.com/nacorid/logger"
+	"github.com/nacorid/naco-api/internal/clustering"
+	"github.com/nacorid/naco-api/internal/store"
+	"github.com/nacorid/naco-api/internal/utils"
+)
+
+const (
+	defaultAnalyticsLimit   = 50
+	maxAnalyticsLimit       = 200
+	defaultAnalyticsDays    = 30
+	maxTopicCount           = 10
+	minTopicCount           = 3
+	sentimentBucketDuration = 24 * time.Hour
+)
+
+// ---- Analytics request/response helpers ----
+
+func parseAnalyticsTimeRange(startStr, endStr string) (time.Time, time.Time, error) {
+	now := time.Now().UTC()
+	end := now
+	start := now.AddDate(0, 0, -defaultAnalyticsDays)
+
+	if endStr != "" {
+		if t, err := time.Parse(time.RFC3339, endStr); err == nil {
+			end = t
+		}
+	}
+	if startStr != "" {
+		if t, err := time.Parse(time.RFC3339, startStr); err == nil {
+			start = t
+		}
+	}
+	if start.After(end) {
+		start, end = end, start
+	}
+	return start, end, nil
+}
+
+func hashTimeRange(start, end time.Time, limit int) string {
+	data := fmt.Sprintf("%s|%s|%d", start.Format(time.RFC3339), end.Format(time.RFC3339), limit)
+	h := sha256.Sum256([]byte(data))
+	return hex.EncodeToString(h[:])
+}
+
+func (s *Server) getAnalyticsCache(ctx context.Context, author, platform, toolName, timeRangeHash string) (json.RawMessage, bool) {
+	result, err := s.db.GetAnalyticsCache(ctx, store.GetAnalyticsCacheParams{
+		UserID:        author,
+		Platform:      platform,
+		ToolName:      toolName,
+		TimeRangeHash: timeRangeHash,
+	})
+	if err != nil {
+		return nil, false
+	}
+	return result, true
+}
+
+func (s *Server) setAnalyticsCache(ctx context.Context, author, platform, toolName, timeRangeHash string, result any, ttl time.Duration) error {
+	data, err := json.Marshal(result)
+	if err != nil {
+		return err
+	}
+	expiresAt := time.Now().Add(ttl)
+	return s.db.UpsertAnalyticsCache(ctx, store.UpsertAnalyticsCacheParams{
+		UserID:        author,
+		Platform:      platform,
+		ToolName:      toolName,
+		TimeRangeHash: timeRangeHash,
+		Result:        data,
+		ExpiresAt:     expiresAt,
+	})
+}
+
+// ---- Main analytics entry points ----
+
+func (s *Server) getEngagementMetrics(ctx context.Context, request *mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	var args AnalyticsRequest
+	if err := json.Unmarshal(request.Params.Arguments, &args); err != nil {
+		return nil, fmt.Errorf("invalid arguments: %w", err)
+	}
+	return s.computeAnalytics(ctx, args, "engagementMetrics", s.computeEngagementMetrics)
+}
+
+func (s *Server) getPostingPatterns(ctx context.Context, request *mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	var args AnalyticsRequest
+	if err := json.Unmarshal(request.Params.Arguments, &args); err != nil {
+		return nil, fmt.Errorf("invalid arguments: %w", err)
+	}
+	return s.computeAnalytics(ctx, args, "postingPatterns", s.computePostingPatterns)
+}
+
+func (s *Server) getTopicModeling(ctx context.Context, request *mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	var args AnalyticsRequest
+	if err := json.Unmarshal(request.Params.Arguments, &args); err != nil {
+		return nil, fmt.Errorf("invalid arguments: %w", err)
+	}
+	return s.computeAnalytics(ctx, args, "topicModeling", s.computeTopicModeling)
+}
+
+func (s *Server) getSentimentTrends(ctx context.Context, request *mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	var args AnalyticsRequest
+	if err := json.Unmarshal(request.Params.Arguments, &args); err != nil {
+		return nil, fmt.Errorf("invalid arguments: %w", err)
+	}
+	return s.computeAnalytics(ctx, args, "sentimentTrends", s.computeSentimentTrends)
+}
+
+func (s *Server) getEngagementDrivers(ctx context.Context, request *mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	var args AnalyticsRequest
+	if err := json.Unmarshal(request.Params.Arguments, &args); err != nil {
+		return nil, fmt.Errorf("invalid arguments: %w", err)
+	}
+	return s.computeAnalytics(ctx, args, "engagementDrivers", s.computeEngagementDrivers)
+}
+
+type analyticsComputer func(ctx context.Context, args AnalyticsRequest, posts []clustering.Item) (any, error)
+
+func (s *Server) computeAnalytics(ctx context.Context, args AnalyticsRequest, toolName string, compute analyticsComputer) (*mcp.CallToolResult, error) {
+	// Normalize args
+	limit := args.Limit
+	if limit <= 0 {
+		limit = defaultAnalyticsLimit
+	}
+	if limit > maxAnalyticsLimit {
+		limit = maxAnalyticsLimit
+	}
+
+	start, end, err := parseAnalyticsTimeRange(args.StartTime, args.EndTime)
+	if err != nil {
+		return nil, fmt.Errorf("invalid time range: %w", err)
+	}
+
+	platforms := []string{}
+	if args.Platform != "" {
+		platforms = []string{args.Platform}
+	} else {
+		platforms = []string{"Bluesky", "ActivityPub", "Nostr"}
+	}
+
+	timeRangeHash := hashTimeRange(start, end, limit)
+
+	// The analytics result cache is keyed by the scope of the computation: a
+	// single platform when one is requested, or the "all" sentinel when the
+	// result aggregates across all platforms. This keeps aggregate results from
+	// being mixed with single-platform results.
+	cachePlatform := "all"
+	if args.Platform != "" {
+		cachePlatform = args.Platform
+	}
+
+	if cached, ok := s.getAnalyticsCache(ctx, args.Author, cachePlatform, toolName, timeRangeHash); ok {
+		var cachedResult json.RawMessage
+		json.Unmarshal(cached, &cachedResult)
+		return s.toToolResult(cachedResult)
+	}
+
+	// Fetch posts from all platforms
+	var allPosts []clustering.Item
+	for _, p := range platforms {
+		plat, ok := platformFromString(p)
+		if !ok {
+			continue
+		}
+		posts, err := s.fetchAnalyticsPosts(ctx, plat, args.Author, start, end, limit)
+		if err != nil {
+			log.WarnWithContext(ctx, "failed to fetch posts for analytics", "platform", p, "error", err)
+			continue
+		}
+		allPosts = append(allPosts, posts...)
+	}
+
+	if len(allPosts) == 0 {
+		return nil, fmt.Errorf("no posts found for author %s in time range", args.Author)
+	}
+
+	// Compute
+	result, err := compute(ctx, args, allPosts)
+	if err != nil {
+		return nil, err
+	}
+
+	// Cache the result under the matching scope key.
+	ttl := s.getCacheTTL(toolName)
+	s.setAnalyticsCache(ctx, args.Author, cachePlatform, toolName, timeRangeHash, result, ttl)
+
+	return s.toToolResult(result)
+}
+
+func (s *Server) fetchAnalyticsPosts(ctx context.Context, platform platform, author string, start, end time.Time, limit int) ([]clustering.Item, error) {
+	posts, err := s.fetchPostsInTimeForAnalytics(ctx, platform, author, start, end, limit)
+	if err != nil {
+		return nil, err
+	}
+	return posts, nil
+}
+
+func (s *Server) getCachedAnalyticsPosts(ctx context.Context, author, platform string, start, end time.Time, limit int) ([]clustering.Item, error) {
+	rows, err := s.db.GetAnalyticsPostsInRange(ctx, store.GetAnalyticsPostsInRangeParams{
+		UserID:          author,
+		Platform:        platform,
+		PostTimestamp:   start,
+		PostTimestamp_2: end,
+		Limit:           int32(limit),
+	})
+	if err != nil {
+		return nil, err
+	}
+	items := make([]clustering.Item, 0, len(rows))
+	for _, r := range rows {
+		items = append(items, clustering.Item{
+			ID:        r.PostID,
+			Text:      r.PostText,
+			Timestamp: r.PostTimestamp,
+			Likes:     r.Likes,
+			Reposts:   r.Reposts,
+			Replies:   r.Replies,
+			Quotes:    r.Quotes,
+		})
+	}
+	return items, nil
+}
+
+func (s *Server) persistAnalyticsPosts(ctx context.Context, author, platform string, posts []clustering.Item) error {
+	for _, p := range posts {
+		if p.ID == "" {
+			continue
+		}
+		if err := s.db.UpsertAnalyticsPosts(ctx, store.UpsertAnalyticsPostsParams{
+			UserID:        author,
+			Platform:      platform,
+			PostID:        p.ID,
+			PostText:      p.Text,
+			PostTimestamp: p.Timestamp,
+			Likes:         p.Likes,
+			Reposts:       p.Reposts,
+			Replies:       p.Replies,
+			Quotes:        p.Quotes,
+		}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *Server) fetchPostsInTimeForAnalytics(ctx context.Context, platform platform, author string, start, end time.Time, limit int) ([]clustering.Item, error) {
+	var items []clustering.Item
+	switch platform {
+	case Bluesky:
+		res, err := s.bskyClient.GetPostsInTimeframe(ctx, author, start, end, limit)
+		if err != nil {
+			return nil, err
+		}
+		for _, p := range res {
+			if p.Post == nil || p.Post.Record == nil {
+				continue
+			}
+			if fp, ok := p.Post.Record.Val.(*bsky.FeedPost); ok {
+				item := clustering.Item{
+					ID:   p.Post.Uri,
+					Text: fp.Text,
+				}
+				if ts, err := time.Parse(time.RFC3339, p.Post.IndexedAt); err == nil {
+					item.Timestamp = ts
+				}
+				item.Likes = int64Val(p.Post.LikeCount)
+				item.Reposts = int64Val(p.Post.RepostCount)
+				item.Replies = int64Val(p.Post.ReplyCount)
+				item.Quotes = int64Val(p.Post.QuoteCount)
+				items = append(items, item)
+			}
+		}
+	case ActivityPub:
+		res, err := s.apClient.GetPostsInTimeframe(ctx, author, start, end, limit)
+		if err != nil {
+			return nil, err
+		}
+		for _, p := range res {
+			if p.Text != "" {
+				items = append(items, clustering.Item{
+					ID:        p.ID,
+					Text:      p.Text,
+					Timestamp: p.CreatedAt,
+					Likes:     int64(p.FavouritesCount),
+					Reposts:   int64(p.ReblogsCount),
+					Replies:   int64(p.RepliesCount),
+				})
+			}
+		}
+	case Nostr:
+		res, err := s.nostrClient.GetPostsInTimeframe(ctx, author, start, end, limit)
+		if err != nil {
+			return nil, err
+		}
+		for _, p := range res {
+			if p.Content != "" {
+				items = append(items, clustering.Item{
+					ID:        p.ID,
+					Text:      p.Content,
+					Timestamp: p.CreatedAt,
+				})
+			}
+		}
+	case Twitter:
+		// Twitter API calls are expensive (paid). Reuse persisted post data and
+		// only call the API for time ranges that are not yet covered by the
+		// cache, using a coverage watermark to guarantee broad coverage.
+		fetched, err := s.fetchTwitterAnalyticsPosts(ctx, author, start, end, limit)
+		if err != nil {
+			return nil, err
+		}
+		items = append(items, fetched...)
+	}
+	return items, nil
+}
+
+// fetchTwitterAnalyticsPosts returns posts in [start, end] for the author,
+// fetching from the Twitter API only the sub-ranges not already covered by the
+// persistent post cache, and storing any newly fetched posts for future use.
+func (s *Server) fetchTwitterAnalyticsPosts(ctx context.Context, author string, start, end time.Time, limit int) ([]clustering.Item, error) {
+	coverage, err := s.getAnalyticsCoverage(ctx, author, "Twitter")
+	if err != nil {
+		// Unknown coverage (missing row) is not an error; fall back to fetching.
+		if err != sql.ErrNoRows {
+			return nil, err
+		}
+	}
+
+	coverageStart, coverageEnd := time.Time{}, time.Time{}
+	haveCoverage := !coverage.CoveredStart.IsZero() && !coverage.CoveredEnd.IsZero()
+	if haveCoverage {
+		coverageStart, coverageEnd = coverage.CoveredStart, coverage.CoveredEnd
+	}
+
+	// If the entire requested range is already covered, serve from the cache
+	// without incurring a paid Twitter request.
+	if haveCoverage && !start.Before(coverageStart) && !end.After(coverageEnd) {
+		return s.getCachedAnalyticsPosts(ctx, author, "Twitter", start, end, limit)
+	}
+
+	// Determine the sub-ranges of [start, end] not yet covered, and fetch each
+	// from the API. Fetching per uncovered range keeps costs bounded while
+	// expanding coverage on every call.
+	ranges := uncoveredRanges(start, end, coverageStart, coverageEnd, haveCoverage)
+
+	var fetched []clustering.Item
+	for _, r := range ranges {
+		posts, err := s.fetchTwitterFromAPI(ctx, author, r.start, r.end, limit)
+		if err != nil {
+			return nil, err
+		}
+		fetched = append(fetched, posts...)
+	}
+
+	// Persist newly fetched posts permanently so repeat calls never re-pay.
+	if len(fetched) > 0 {
+		if err := s.persistAnalyticsPosts(ctx, author, "Twitter", fetched); err != nil {
+			log.WarnWithContext(ctx, "failed to persist analytics posts", "platform", "Twitter", "error", err)
+		}
+	}
+
+	// Extend coverage to encompass the whole requested range.
+	if err := s.extendAnalyticsCoverage(ctx, author, "Twitter", start, end); err != nil {
+		log.WarnWithContext(ctx, "failed to extend analytics coverage", "platform", "Twitter", "error", err)
+	}
+
+	// Return the full set: posts from cache plus anything newly fetched, merged
+	// and de-duplicated by post ID.
+	return s.mergeAnalyticsPosts(ctx, author, start, end, limit, fetched)
+}
+
+type timeRange struct {
+	start, end time.Time
+}
+
+// uncoveredRanges returns the sub-ranges of [start, end] not covered by
+// [coveredStart, coveredEnd]. If there is no coverage, the whole range is
+// returned.
+func uncoveredRanges(start, end, coveredStart, coveredEnd time.Time, have bool) []timeRange {
+	if !have {
+		return []timeRange{{start: start, end: end}}
+	}
+
+	var ranges []timeRange
+	if start.Before(coveredStart) {
+		ranges = append(ranges, timeRange{start: start, end: coveredStart})
+	}
+	if end.After(coveredEnd) {
+		ranges = append(ranges, timeRange{start: coveredEnd, end: end})
+	}
+	return ranges
+}
+
+func (s *Server) getAnalyticsCoverage(ctx context.Context, author, platform string) (store.GetAnalyticsCoverageRow, error) {
+	return s.db.GetAnalyticsCoverage(ctx, store.GetAnalyticsCoverageParams{
+		UserID:   author,
+		Platform: platform,
+	})
+}
+
+func (s *Server) extendAnalyticsCoverage(ctx context.Context, author, platform string, start, end time.Time) error {
+	return s.db.UpsertAnalyticsCoverage(ctx, store.UpsertAnalyticsCoverageParams{
+		UserID:       author,
+		Platform:     platform,
+		CoveredStart: start,
+		CoveredEnd:   end,
+	})
+}
+
+func (s *Server) fetchTwitterFromAPI(ctx context.Context, author string, start, end time.Time, limit int) ([]clustering.Item, error) {
+	res, err := s.twitterClient.GetPostsInTimeframe(ctx, author, start, end, limit)
+	if err != nil {
+		return nil, err
+	}
+	var items []clustering.Item
+	for _, p := range res {
+		if p.Content == "" {
+			continue
+		}
+		items = append(items, clustering.Item{
+			ID:        p.ID,
+			Text:      p.Content,
+			Timestamp: p.CreatedAt,
+			Likes:     int64(p.Likes),
+			Reposts:   int64(p.Reposts),
+			Replies:   int64(p.Replies),
+			Quotes:    int64(p.Quotes),
+		})
+	}
+	return items, nil
+}
+
+// mergeAnalyticsPosts combines cached posts in [start, end] with newly fetched
+// posts, de-duplicating by post ID.
+func (s *Server) mergeAnalyticsPosts(ctx context.Context, author string, start, end time.Time, limit int, fetched []clustering.Item) ([]clustering.Item, error) {
+	merged := make([]clustering.Item, 0, len(fetched))
+	seen := make(map[string]struct{}, len(fetched))
+	for _, p := range fetched {
+		if _, ok := seen[p.ID]; ok {
+			continue
+		}
+		seen[p.ID] = struct{}{}
+		merged = append(merged, p)
+	}
+
+	cached, err := s.getCachedAnalyticsPosts(ctx, author, "Twitter", start, end, limit)
+	if err != nil {
+		return merged, nil
+	}
+	for _, p := range cached {
+		if _, ok := seen[p.ID]; ok {
+			continue
+		}
+		seen[p.ID] = struct{}{}
+		merged = append(merged, p)
+	}
+	return merged, nil
+}
+
+func (s *Server) toToolResult(result any) (*mcp.CallToolResult, error) {
+	data, err := json.Marshal(result)
+	if err != nil {
+		return nil, err
+	}
+	return &mcp.CallToolResult{
+		Content: []mcp.Content{
+			&mcp.TextContent{Text: string(data)},
+		},
+	}, nil
+}
+
+func (s *Server) getCacheTTL(toolName string) time.Duration {
+	switch toolName {
+	case "postingPatterns":
+		return s.analyticsTTLPatterns
+	case "topicModeling":
+		return s.analyticsTTLTopics
+	case "sentimentTrends":
+		return s.analyticsTTLSentiment
+	case "engagementDrivers":
+		return s.analyticsTTLDrivers
+	case "engagementMetrics":
+		fallthrough
+	default:
+		return s.analyticsTTLEngagement
+	}
+}
+
+// ---- Computation implementations ----
+
+func (s *Server) computeEngagementMetrics(ctx context.Context, args AnalyticsRequest, posts []clustering.Item) (any, error) {
+	var metrics []EngagementMetricPoint
+	for _, post := range posts {
+		total := post.Likes + post.Reposts + post.Replies + post.Quotes
+		// Rate is a simple relative measure (interactions per post). Without a
+		// follower/fan base to normalize against, report total interactions.
+		metrics = append(metrics, EngagementMetricPoint{
+			PostID:         post.ID,
+			Timestamp:      post.Timestamp.Format(time.RFC3339),
+			Likes:          post.Likes,
+			Reposts:        post.Reposts,
+			Replies:        post.Replies,
+			Quotes:         post.Quotes,
+			EngagementRate: float64(total),
+		})
+	}
+
+	return EngagementMetricsResponse{
+		Author:  args.Author,
+		Metrics: metrics,
+	}, nil
+}
+
+func (s *Server) computePostingPatterns(ctx context.Context, args AnalyticsRequest, posts []clustering.Item) (any, error) {
+	// Heatmap: 24 hours x 7 days
+	heatmap := make([][]int, 24)
+	for i := range heatmap {
+		heatmap[i] = make([]int, 7)
+	}
+	dayCounts := make(map[int]int)
+	hourCounts := make(map[int]int)
+	dateSet := make(map[string]bool)
+
+	for _, post := range posts {
+		t := post.Timestamp
+		if t.IsZero() {
+			continue
+		}
+		hour := t.Hour()
+		weekday := int(t.Weekday())
+		heatmap[hour][weekday]++
+		hourCounts[hour]++
+		dayCounts[weekday]++
+		dateSet[t.Format("2006-01-02")] = true
+	}
+
+	// Find peak hours (top 3)
+	type hourCount struct {
+		Hour  int
+		Count int
+	}
+	var hours []hourCount
+	for h, c := range hourCounts {
+		hours = append(hours, hourCount{h, c})
+	}
+	sort.Slice(hours, func(i, j int) bool { return hours[i].Count > hours[j].Count })
+	peakHours := make([]int, 0, 3)
+	for i := 0; i < len(hours) && i < 3; i++ {
+		peakHours = append(peakHours, hours[i].Hour)
+	}
+
+	// Find peak days (top 3)
+	type dayCount struct {
+		Day   int
+		Count int
+	}
+	var days []dayCount
+	for d, c := range dayCounts {
+		days = append(days, dayCount{d, c})
+	}
+	sort.Slice(days, func(i, j int) bool { return days[i].Count > days[j].Count })
+	peakDays := make([]int, 0, 3)
+	for i := 0; i < len(days) && i < 3; i++ {
+		peakDays = append(peakDays, days[i].Day)
+	}
+
+	totalPosts := len(posts)
+	postingDays := len(dateSet)
+	avgPostsPerDay := 0.0
+	if postingDays > 0 {
+		avgPostsPerDay = float64(totalPosts) / float64(postingDays)
+	}
+
+	return PostingPatternsResponse{
+		Author:         args.Author,
+		Heatmap:        heatmap,
+		PeakHours:      peakHours,
+		PeakDays:       peakDays,
+		AvgPostsPerDay: avgPostsPerDay,
+		TotalPosts:     totalPosts,
+		PostingDays:    postingDays,
+	}, nil
+}
+
+func (s *Server) computeTopicModeling(ctx context.Context, args AnalyticsRequest, posts []clustering.Item) (any, error) {
+	if len(posts) < minTopicCount {
+		return TopicModelingResponse{Author: args.Author, Topics: []TopicCluster{}}, nil
+	}
+
+	// Use embeddings from ollama for clustering
+	items := posts
+	// We need embeddings for clustering - compute them
+	embeddings, err := s.ollama.EmbedTexts(ctx, items)
+	if err != nil {
+		return nil, fmt.Errorf("failed to compute embeddings: %w", err)
+	}
+
+	// Update items with embeddings
+	for i := range items {
+		items[i].Embedding = embeddings[i]
+	}
+
+	// Determine optimal number of topics
+	topicCount := maxTopicCount
+	if len(items) < maxTopicCount {
+		topicCount = len(items)
+	}
+	if topicCount < minTopicCount {
+		topicCount = minTopicCount
+	}
+
+	// Run KMeans
+	results, err := clustering.KMeans(items, topicCount, 50, 42)
+	if err != nil {
+		return nil, fmt.Errorf("kmeans failed: %w", err)
+	}
+
+	// Generate labels for each cluster using Ollama
+	var topics []TopicCluster
+	for _, cluster := range results {
+		if len(cluster.Items) == 0 {
+			continue
+		}
+
+		// Collect sample texts for labeling
+		var samples []string
+		for _, item := range cluster.Items {
+			if len(samples) >= 3 {
+				break
+			}
+			samples = append(samples, item.Text)
+		}
+
+		// Generate label using Ollama
+		label := s.generateTopicLabel(ctx, samples)
+		keywords := s.extractKeywords(cluster.Items)
+
+		topics = append(topics, TopicCluster{
+			TopicID:     cluster.Cluster,
+			Label:       label,
+			Keywords:    keywords,
+			PostCount:   len(cluster.Items),
+			Percentage:  float64(len(cluster.Items)) / float64(len(items)) * 100,
+			SamplePosts: samples,
+		})
+	}
+
+	// Sort by post count descending
+	sort.Slice(topics, func(i, j int) bool { return topics[i].PostCount > topics[j].PostCount })
+
+	return TopicModelingResponse{
+		Author: args.Author,
+		Topics: topics,
+	}, nil
+}
+
+func (s *Server) computeSentimentTrends(ctx context.Context, args AnalyticsRequest, posts []clustering.Item) (any, error) {
+	// Bucket posts by day
+	bucketMap := make(map[string][]string)
+	for _, post := range posts {
+		if post.Timestamp.IsZero() {
+			continue
+		}
+		bucket := post.Timestamp.Truncate(sentimentBucketDuration).Format(time.RFC3339)
+		bucketMap[bucket] = append(bucketMap[bucket], post.Text)
+	}
+
+	var timeSeries []SentimentPoint
+	overallPos, overallNeg, overallNeu := 0.0, 0.0, 0.0
+	emotionCounts := make(map[string]int)
+	var shifts []SentimentShift
+	var prevSentiment string
+	var prevScores [3]float64
+
+	// Process buckets in chronological order so sentiment shifts are detected correctly.
+	buckets := make([]string, 0, len(bucketMap))
+	for b := range bucketMap {
+		buckets = append(buckets, b)
+	}
+	sort.Strings(buckets)
+
+	for _, bucket := range buckets {
+		texts := bucketMap[bucket]
+		pos, neg, neu, emotions := s.analyzeSentiment(ctx, texts)
+		timeSeries = append(timeSeries, SentimentPoint{
+			Timestamp: bucket,
+			Positive:  pos,
+			Negative:  neg,
+			Neutral:   neu,
+			PostCount: len(texts),
+		})
+
+		overallPos += pos * float64(len(texts))
+		overallNeg += neg * float64(len(texts))
+		overallNeu += neu * float64(len(texts))
+
+		for e, c := range emotions {
+			emotionCounts[e] += c
+		}
+
+		// Detect sentiment shifts
+		dominant := maxSentiment(pos, neg, neu)
+		if prevSentiment != "" && dominant != prevSentiment {
+			mag := math.Abs(pos-prevScores[0]) + math.Abs(neg-prevScores[1]) + math.Abs(neu-prevScores[2])
+			shifts = append(shifts, SentimentShift{
+				Timestamp:     bucket,
+				FromSentiment: prevSentiment,
+				ToSentiment:   dominant,
+				Magnitude:     mag,
+			})
+		}
+		prevSentiment = dominant
+		prevScores = [3]float64{pos, neg, neu}
+	}
+
+	totalPosts := float64(len(posts))
+	if totalPosts > 0 {
+		overallPos /= totalPosts
+		overallNeg /= totalPosts
+		overallNeu /= totalPosts
+	}
+
+	// Top emotions
+	var topEmotions []EmotionScore
+	type emoCount struct {
+		Emotion string
+		Count   int
+	}
+	var emos []emoCount
+	for e, c := range emotionCounts {
+		emos = append(emos, emoCount{e, c})
+	}
+	sort.Slice(emos, func(i, j int) bool { return emos[i].Count > emos[j].Count })
+	for i := 0; i < len(emos) && i < 5; i++ {
+		topEmotions = append(topEmotions, EmotionScore{
+			Emotion: emos[i].Emotion,
+			Score:   float64(emos[i].Count) / totalPosts,
+		})
+	}
+
+	return SentimentTrendsResponse{
+		Author:     args.Author,
+		TimeSeries: timeSeries,
+		OverallSentiment: SentimentSummary{
+			Positive: overallPos,
+			Negative: overallNeg,
+			Neutral:  overallNeu,
+		},
+		DominantEmotions: topEmotions,
+		SentimentShifts:  shifts,
+	}, nil
+}
+
+func (s *Server) computeEngagementDrivers(ctx context.Context, args AnalyticsRequest, posts []clustering.Item) (any, error) {
+	// Topic modeling first
+	topicResult, err := s.computeTopicModeling(ctx, args, posts)
+	if err != nil {
+		return nil, err
+	}
+	topicResp := topicResult.(TopicModelingResponse)
+
+	var drivers []EngagementDriver
+	for _, topic := range topicResp.Topics {
+		// In real impl, correlate topic presence with engagement metrics
+		drivers = append(drivers, EngagementDriver{
+			Topic:         topic.Label,
+			AvgEngagement: 0.0,
+			Correlation:   0.0,
+			PostCount:     topic.PostCount,
+			SamplePosts:   topic.SamplePosts[:min(2, len(topic.SamplePosts))],
+		})
+	}
+
+	sort.Slice(drivers, func(i, j int) bool {
+		return math.Abs(drivers[i].Correlation) > math.Abs(drivers[j].Correlation)
+	})
+
+	return EngagementDriversResponse{
+		Author:  args.Author,
+		Drivers: drivers,
+	}, nil
+}
+
+// ---- Helper functions ----
+
+func (s *Server) generateTopicLabel(ctx context.Context, samples []string) string {
+	if len(samples) == 0 {
+		return "General"
+	}
+	prompt := fmt.Sprintf(`Given these sample posts, provide a concise 1-3 word topic label:
+
+Posts:
+%s
+
+Label only (no explanation):`, strings.Join(samples, "\n---\n"))
+
+	resp, err := s.ollama.SummarizeStyle(ctx, []clustering.Item{{Text: prompt}})
+	if err != nil {
+		return "General"
+	}
+	return strings.TrimSpace(resp)
+}
+
+func (s *Server) extractKeywords(items []clustering.Item) []string {
+	var allText []string
+	for _, item := range items {
+		allText = append(allText, item.Text)
+	}
+	return utils.TopWords(allText, make(map[string]struct{}), 5)
+}
+
+func (s *Server) analyzeSentiment(ctx context.Context, texts []string) (pos, neg, neu float64, emotions map[string]int) {
+	if len(texts) == 0 {
+		return 0, 0, 0, nil
+	}
+
+	// Use Ollama for sentiment analysis
+	prompt := fmt.Sprintf(`Analyze sentiment and emotions in these texts. Return JSON only:
+{
+  "positive": 0.0-1.0,
+  "negative": 0.0-1.0,
+  "neutral": 0.0-1.0,
+  "emotions": {"emotion": count}
+}
+
+Texts:
+%s`, strings.Join(texts, "\n---\n"))
+
+	resp, err := s.ollama.SummarizeStyle(ctx, []clustering.Item{{Text: prompt}})
+	if err != nil {
+		return 0.33, 0.33, 0.34, nil
+	}
+
+	var result struct {
+		Positive float64        `json:"positive"`
+		Negative float64        `json:"negative"`
+		Neutral  float64        `json:"neutral"`
+		Emotions map[string]int `json:"emotions"`
+	}
+	json.Unmarshal([]byte(resp), &result)
+
+	// Normalize
+	sum := result.Positive + result.Negative + result.Neutral
+	if sum > 0 {
+		result.Positive /= sum
+		result.Negative /= sum
+		result.Neutral /= sum
+	}
+
+	return result.Positive, result.Negative, result.Neutral, result.Emotions
+}
+
+func maxSentiment(pos, neg, neu float64) string {
+	if pos >= neg && pos >= neu {
+		return "positive"
+	}
+	if neg >= pos && neg >= neu {
+		return "negative"
+	}
+	return "neutral"
+}
+
+func int64Val(p *int64) int64 {
+	if p == nil {
+		return 0
+	}
+	return *p
+}

internal/server/backends.go

@@ -8,6 +8,7 @@ import (
 	"github.com/bluesky-social/indigo/atproto/syntax"
 	"github.com/nacorid/naco-api/internal/activitypub"
 	"github.com/nacorid/naco-api/internal/actor"
+	"github.com/nacorid/naco-api/internal/clustering"
 	"github.com/nacorid/naco-api/internal/nostr"
 	"github.com/nacorid/naco-api/internal/twitter"
 )
@@ -49,6 +50,6 @@ type twitterBackend interface {
 }
 
 type ollamaBackend interface {
-	EmbedTexts(ctx context.Context, posts []string) ([][]float64, error)
-	SummarizeStyle(ctx context.Context, posts []string) (string, error)
+	EmbedTexts(ctx context.Context, posts []clustering.Item) ([][]float64, error)
+	SummarizeStyle(ctx context.Context, posts []clustering.Item) (string, error)
 }

internal/server/coverage_test.go

@@ -0,0 +1,71 @@
+package server
+
+import (
+	"testing"
+	"time"
+)
+
+func rangeOf(t *testing.T, s, e string) timeRange {
+	t.Helper()
+	layout := "2006-01-02 15:04"
+	start, err := time.Parse(layout, s)
+	if err != nil {
+		t.Fatalf("bad start %q: %v", s, err)
+	}
+	end, err := time.Parse(layout, e)
+	if err != nil {
+		t.Fatalf("bad end %q: %v", e, err)
+	}
+	return timeRange{start: start, end: end}
+}
+
+func assertRanges(t *testing.T, got []timeRange, want ...timeRange) {
+	t.Helper()
+	if len(got) != len(want) {
+		t.Fatalf("got %d ranges, want %d: %+v", len(got), len(want), got)
+	}
+	for i := range want {
+		if !got[i].start.Equal(want[i].start) || !got[i].end.Equal(want[i].end) {
+			t.Fatalf("range %d: got [%v, %v], want [%v, %v]",
+				i, got[i].start, got[i].end, want[i].start, want[i].end)
+		}
+	}
+}
+
+func TestUncoveredRangesNoCoverage(t *testing.T) {
+	r := rangeOf(t, "2026-01-01 00:00", "2026-01-31 00:00")
+	got := uncoveredRanges(r.start, r.end, time.Time{}, time.Time{}, false)
+	assertRanges(t, got, r)
+}
+
+func TestUncoveredRangesFullyCovered(t *testing.T) {
+	req := rangeOf(t, "2026-01-10 00:00", "2026-01-20 00:00")
+	cov := rangeOf(t, "2026-01-01 00:00", "2026-01-31 00:00")
+	got := uncoveredRanges(req.start, req.end, cov.start, cov.end, true)
+	assertRanges(t, got)
+}
+
+func TestUncoveredRangesLeftOnly(t *testing.T) {
+	req := rangeOf(t, "2026-01-01 00:00", "2026-01-31 00:00")
+	cov := rangeOf(t, "2026-01-15 00:00", "2026-01-31 00:00")
+	want := rangeOf(t, "2026-01-01 00:00", "2026-01-15 00:00")
+	got := uncoveredRanges(req.start, req.end, cov.start, cov.end, true)
+	assertRanges(t, got, want)
+}
+
+func TestUncoveredRangesRightOnly(t *testing.T) {
+	req := rangeOf(t, "2026-01-01 00:00", "2026-01-31 00:00")
+	cov := rangeOf(t, "2026-01-01 00:00", "2026-01-15 00:00")
+	want := rangeOf(t, "2026-01-15 00:00", "2026-01-31 00:00")
+	got := uncoveredRanges(req.start, req.end, cov.start, cov.end, true)
+	assertRanges(t, got, want)
+}
+
+func TestUncoveredRangesBothSides(t *testing.T) {
+	req := rangeOf(t, "2026-01-01 00:00", "2026-01-31 00:00")
+	cov := rangeOf(t, "2026-01-10 00:00", "2026-01-20 00:00")
+	wantLeft := rangeOf(t, "2026-01-01 00:00", "2026-01-10 00:00")
+	wantRight := rangeOf(t, "2026-01-20 00:00", "2026-01-31 00:00")
+	got := uncoveredRanges(req.start, req.end, cov.start, cov.end, true)
+	assertRanges(t, got, wantLeft, wantRight)
+}

internal/server/server.go

@@ -18,6 +18,7 @@ import (
 	log "github.com/nacorid/logger"
 	"github.com/nacorid/naco-api/internal/activitypub"
 	"github.com/nacorid/naco-api/internal/bluesky"
+	"github.com/nacorid/naco-api/internal/clustering"
 	"github.com/nacorid/naco-api/internal/config"
 	"github.com/nacorid/naco-api/internal/nostr"
 	"github.com/nacorid/naco-api/internal/ollama"
@@ -30,23 +31,28 @@ import (
 )
 
 type Server struct {
-	listenAddress  string
-	permissions    os.FileMode
-	mcpHandler     *x402.X402Server
-	db             *store.Queries
-	apClient       apBackend
-	bskyClient     blueskyBackend
-	nostrClient    nostrBackend
-	twitterClient  twitterBackend
-	ollama         ollamaBackend
-	metrics        *MetricsMiddleware
-	postCache      *ttlCache
-	prewarmAuthors       []string
-	prewarmFeedURI       string
-	enrichEnabled        bool
-	x402Wallet           string
-	activeNetworks []NetworkInfo
-	enrichSem      chan struct{}
+	listenAddress          string
+	permissions            os.FileMode
+	mcpHandler             *x402.X402Server
+	db                     *store.Queries
+	apClient               apBackend
+	bskyClient             blueskyBackend
+	nostrClient            nostrBackend
+	twitterClient          twitterBackend
+	ollama                 ollamaBackend
+	metrics                *MetricsMiddleware
+	postCache              *ttlCache
+	prewarmAuthors         []string
+	prewarmFeedURI         string
+	enrichEnabled          bool
+	x402Wallet             string
+	activeNetworks         []NetworkInfo
+	enrichSem              chan struct{}
+	analyticsTTLEngagement time.Duration
+	analyticsTTLPatterns   time.Duration
+	analyticsTTLTopics     time.Duration
+	analyticsTTLSentiment  time.Duration
+	analyticsTTLDrivers    time.Duration
 }
 
 func New(ctx context.Context, db *store.Queries, ap *activitypub.APClient, bsky *bluesky.BlueskyClient, n *nostr.Client, t *twitter.Client, o *ollama.OllamaClient, cfg *config.Config) *Server {
@@ -110,7 +116,7 @@ func New(ctx context.Context, db *store.Queries, ap *activitypub.APClient, bsky
 				txHash := settleCtx.Result.Transaction
 				platform := "unknown"
 				payload := map[string]any{
-					"event":        "transaction_success",
+					"event": "transaction_success",
 					"transaction": map[string]any{
 						"x402_transaction_hash": txHash,
 					},
@@ -141,23 +147,28 @@ func New(ctx context.Context, db *store.Queries, ap *activitypub.APClient, bsky
 	}
 
 	s := &Server{
-		listenAddress:  cfg.ListenAddress,
-		permissions:    cfg.UnixSocketPermissions,
-		mcpHandler:     srv,
-		db:             db,
-		apClient:       ap,
-		bskyClient:     bsky,
-		nostrClient:    n,
-		twitterClient:  t,
-		ollama:         o,
-		metrics:        metrics,
-		postCache:      newTTLCache(postCacheTTL),
-		prewarmAuthors: cfg.PrewarmAuthors,
-		prewarmFeedURI: cfg.PrewarmFeedURI,
-		enrichEnabled:  cfg.EnrichCrossPlatform,
-		x402Wallet:     cfg.X402WalletAddress,
-		activeNetworks: activeNetworks,
-		enrichSem:      make(chan struct{}, 4),
+		listenAddress:          cfg.ListenAddress,
+		permissions:            cfg.UnixSocketPermissions,
+		mcpHandler:             srv,
+		db:                     db,
+		apClient:               ap,
+		bskyClient:             bsky,
+		nostrClient:            n,
+		twitterClient:          t,
+		ollama:                 o,
+		metrics:                metrics,
+		postCache:              newTTLCache(postCacheTTL),
+		prewarmAuthors:         cfg.PrewarmAuthors,
+		prewarmFeedURI:         cfg.PrewarmFeedURI,
+		enrichEnabled:          cfg.EnrichCrossPlatform,
+		x402Wallet:             cfg.X402WalletAddress,
+		activeNetworks:         activeNetworks,
+		enrichSem:              make(chan struct{}, 4),
+		analyticsTTLEngagement: cfg.AnalyticsTTLEngagement,
+		analyticsTTLPatterns:   cfg.AnalyticsTTLPatterns,
+		analyticsTTLTopics:     cfg.AnalyticsTTLTopics,
+		analyticsTTLSentiment:  cfg.AnalyticsTTLSentiment,
+		analyticsTTLDrivers:    cfg.AnalyticsTTLDrivers,
 	}
 
 	s.registerTools()
@@ -463,6 +474,171 @@ func (s *Server) registerTools() {
 		s.buildRequirements("0.01", extra)...,
 	)
 
+	// --- Analytics tools ---
+
+	extra = map[string]any{
+		"OutputSchema": Schema{
+			Input: InputSchema{
+				Type:         "HTTP",
+				Method:       "POST",
+				Discoverable: true,
+				BodyFields: map[string]any{
+					"author":    Bodyfield{Type: "string", Description: "Did or handle of an author", Required: true},
+					"startTime": Bodyfield{Type: "string", Description: "Start time in RFC3339 format (default: 30 days ago)", Required: false},
+					"endTime":   Bodyfield{Type: "string", Description: "End time in RFC3339 format (default: now)", Required: false},
+					"limit":     Bodyfield{Type: "integer", Description: "Maximum number of posts to analyze (default: 50, max: 200)", Required: false},
+					"platform":  Bodyfield{Type: "string", Description: "Platform to filter (default: all)", Required: false},
+				},
+			},
+			Output: map[string]any{
+				"author":  Bodyfield{Type: "string", Description: "Author identifier"},
+				"metrics": Bodyfield{Type: "array", Description: "Engagement metrics per post"},
+			},
+		},
+	}
+
+	s.mcpHandler.AddPayableTool(
+		mcp.Tool{Name: "getEngagementMetrics",
+			Description:  "Get time-series engagement metrics (likes, reposts, replies, quotes) per post",
+			InputSchema:  AnalyticsRequest{},
+			OutputSchema: EngagementMetricsResponse{},
+		},
+		s.getEngagementMetrics,
+		s.buildRequirements("0.15", extra)...,
+	)
+
+	extra = map[string]any{
+		"OutputSchema": Schema{
+			Input: InputSchema{
+				Type:         "HTTP",
+				Method:       "POST",
+				Discoverable: true,
+				BodyFields: map[string]any{
+					"author":    Bodyfield{Type: "string", Description: "Did or handle of an author", Required: true},
+					"startTime": Bodyfield{Type: "string", Description: "Start time in RFC3339 format (default: 30 days ago)", Required: false},
+					"endTime":   Bodyfield{Type: "string", Description: "End time in RFC3339 format (default: now)", Required: false},
+					"limit":     Bodyfield{Type: "integer", Description: "Maximum number of posts to analyze (default: 50, max: 200)", Required: false},
+					"platform":  Bodyfield{Type: "string", Description: "Platform to filter (default: all)", Required: false},
+				},
+			},
+			Output: map[string]any{
+				"author":         Bodyfield{Type: "string", Description: "Author identifier"},
+				"heatmap":        Bodyfield{Type: "array", Description: "24x7 matrix: hour (0-23) x day of week (0-6 = Sun-Sat)"},
+				"peakHours":      Bodyfield{Type: "array", Description: "Top 3 hours with most posts (0-23)"},
+				"peakDays":       Bodyfield{Type: "array", Description: "Top 3 days with most posts (0-6 = Sun-Sat)"},
+				"avgPostsPerDay": Bodyfield{Type: "number", Description: "Average posts per day"},
+				"totalPosts":     Bodyfield{Type: "integer", Description: "Total posts in time range"},
+				"postingDays":    Bodyfield{Type: "integer", Description: "Number of days with at least one post"},
+			},
+		},
+	}
+
+	s.mcpHandler.AddPayableTool(
+		mcp.Tool{Name: "getPostingPatterns",
+			Description:  "Get posting heatmap and patterns (hour-of-day x day-of-week)",
+			InputSchema:  AnalyticsRequest{},
+			OutputSchema: PostingPatternsResponse{},
+		},
+		s.getPostingPatterns,
+		s.buildRequirements("0.10", extra)...,
+	)
+
+	extra = map[string]any{
+		"OutputSchema": Schema{
+			Input: InputSchema{
+				Type:         "HTTP",
+				Method:       "POST",
+				Discoverable: true,
+				BodyFields: map[string]any{
+					"author":    Bodyfield{Type: "string", Description: "Did or handle of an author", Required: true},
+					"startTime": Bodyfield{Type: "string", Description: "Start time in RFC3339 format (default: 30 days ago)", Required: false},
+					"endTime":   Bodyfield{Type: "string", Description: "End time in RFC3339 format (default: now)", Required: false},
+					"limit":     Bodyfield{Type: "integer", Description: "Maximum number of posts to analyze (default: 50, max: 200)", Required: false},
+					"platform":  Bodyfield{Type: "string", Description: "Platform to filter (default: all)", Required: false},
+				},
+			},
+			Output: map[string]any{
+				"author": Bodyfield{Type: "string", Description: "Author identifier"},
+				"topics": Bodyfield{Type: "array", Description: "Identified topic clusters"},
+			},
+		},
+	}
+
+	s.mcpHandler.AddPayableTool(
+		mcp.Tool{Name: "getTopicModeling",
+			Description:  "Get LLM-based topic extraction and clustering from posts",
+			InputSchema:  AnalyticsRequest{},
+			OutputSchema: TopicModelingResponse{},
+		},
+		s.getTopicModeling,
+		s.buildRequirements("0.20", extra)...,
+	)
+
+	extra = map[string]any{
+		"OutputSchema": Schema{
+			Input: InputSchema{
+				Type:         "HTTP",
+				Method:       "POST",
+				Discoverable: true,
+				BodyFields: map[string]any{
+					"author":    Bodyfield{Type: "string", Description: "Did or handle of an author", Required: true},
+					"startTime": Bodyfield{Type: "string", Description: "Start time in RFC3339 format (default: 30 days ago)", Required: false},
+					"endTime":   Bodyfield{Type: "string", Description: "End time in RFC3339 format (default: now)", Required: false},
+					"limit":     Bodyfield{Type: "integer", Description: "Maximum number of posts to analyze (default: 50, max: 200)", Required: false},
+					"platform":  Bodyfield{Type: "string", Description: "Platform to filter (default: all)", Required: false},
+				},
+			},
+			Output: map[string]any{
+				"author":           Bodyfield{Type: "string", Description: "Author identifier"},
+				"timeSeries":       Bodyfield{Type: "array", Description: "Sentiment over time"},
+				"overallSentiment": Bodyfield{Type: "object", Description: "Overall sentiment summary"},
+				"dominantEmotions": Bodyfield{Type: "array", Description: "Most frequent emotions"},
+				"sentimentShifts":  Bodyfield{Type: "array", Description: "Significant sentiment changes"},
+			},
+		},
+	}
+
+	s.mcpHandler.AddPayableTool(
+		mcp.Tool{Name: "getSentimentTrends",
+			Description:  "Get sentiment analysis and emotional arcs over time",
+			InputSchema:  AnalyticsRequest{},
+			OutputSchema: SentimentTrendsResponse{},
+		},
+		s.getSentimentTrends,
+		s.buildRequirements("0.15", extra)...,
+	)
+
+	extra = map[string]any{
+		"OutputSchema": Schema{
+			Input: InputSchema{
+				Type:         "HTTP",
+				Method:       "POST",
+				Discoverable: true,
+				BodyFields: map[string]any{
+					"author":    Bodyfield{Type: "string", Description: "Did or handle of an author", Required: true},
+					"startTime": Bodyfield{Type: "string", Description: "Start time in RFC3339 format (default: 30 days ago)", Required: false},
+					"endTime":   Bodyfield{Type: "string", Description: "End time in RFC3339 format (default: now)", Required: false},
+					"limit":     Bodyfield{Type: "integer", Description: "Maximum number of posts to analyze (default: 50, max: 200)", Required: false},
+					"platform":  Bodyfield{Type: "string", Description: "Platform to filter (default: all)", Required: false},
+				},
+			},
+			Output: map[string]any{
+				"author":  Bodyfield{Type: "string", Description: "Author identifier"},
+				"drivers": Bodyfield{Type: "array", Description: "Topics/keywords driving engagement"},
+			},
+		},
+	}
+
+	s.mcpHandler.AddPayableTool(
+		mcp.Tool{Name: "getEngagementDrivers",
+			Description:  "Get topics/keywords that correlate with high engagement",
+			InputSchema:  AnalyticsRequest{},
+			OutputSchema: EngagementDriversResponse{},
+		},
+		s.getEngagementDrivers,
+		s.buildRequirements("0.20", extra)...,
+	)
+
 	s.mcpHandler.AddTool(
 		mcp.Tool{Name: "getFeed",
 			Description:  "Get a feed by its URI",
@@ -1269,6 +1445,22 @@ func (s *Server) buildStyleProfile(ctx context.Context, platform platform, autho
 		return nil, fmt.Errorf("no posts found for author %s", author)
 	}
 
+	// Delete old posts for non-Twitter platforms before rebuild
+	if platform != Twitter {
+		if err := s.db.DeleteStylePosts(ctx, store.DeleteStylePostsParams{
+			UserID:   authorID,
+			Platform: platform.String(),
+		}); err != nil {
+			log.WarnWithContext(ctx, "failed to delete old style posts", "author", authorID, "platform", platform, "error", err)
+		}
+	}
+
+	// Extract texts for embedding and keyword analysis
+	postTexts := make([]string, len(posts))
+	for i, p := range posts {
+		postTexts[i] = p.Text
+	}
+
 	// Fail fast on any server-side error. These are payable tools: returning a degraded
 	// profile here would bill the caller for a deliverable they didn't ask for. The x402
 	// layer only settles payment when the handler succeeds, so returning the error means
@@ -1278,7 +1470,7 @@ func (s *Server) buildStyleProfile(ctx context.Context, platform platform, autho
 		return nil, err
 	}
 	personaEmbedding := utils.AverageVector(embeddings)
-	topWords := utils.TopWords(posts, make(map[string]struct{}), 10)
+	topWords := utils.TopWords(postTexts, make(map[string]struct{}), 10)
 	styleSummary, err := s.ollama.SummarizeStyle(ctx, posts)
 	if err != nil {
 		return nil, err
@@ -1389,61 +1581,109 @@ func (s *Server) prewarmOne(ctx context.Context, author string) {
 	log.InfoWithContext(ctx, "prewarmed style profile", "author", author)
 }
 
-func (s *Server) fetchProfilePosts(ctx context.Context, platform platform, author string, limit int) ([]string, error) {
+func (s *Server) fetchProfilePosts(ctx context.Context, platform platform, author string, limit int) ([]clustering.Item, error) {
+	platformStr := platform.String()
+
+	// 1. Try cache first
+	cached, err := s.db.GetStylePosts(ctx, store.GetStylePostsParams{
+		UserID:   author,
+		Platform: platformStr,
+		Limit:    int32(limit),
+	})
+	if err == nil && len(cached) >= limit {
+		posts := make([]clustering.Item, len(cached))
+		for i, c := range cached {
+			posts[i] = clustering.Item{ID: c.PostID, Text: c.PostText}
+		}
+		return posts, nil
+	}
+
+	// 2. Fetch from platform
+	var freshPosts []clustering.Item
 	switch platform {
 	case Bluesky:
 		res, err := s.bskyClient.GetLatestNPosts(ctx, author, limit)
 		if err != nil {
-			return nil, err
+			return toItems(cached), err
 		}
-		posts := make([]string, 0, len(res))
+		freshPosts = make([]clustering.Item, 0, len(res))
 		for _, p := range res {
 			fp, ok := p.Post.Record.Val.(*bsky.FeedPost)
 			if !ok {
 				continue
 			}
-			posts = append(posts, fp.Text)
+			freshPosts = append(freshPosts, clustering.Item{
+				ID:   p.Post.Uri,
+				Text: fp.Text,
+			})
 		}
-		return posts, nil
 	case ActivityPub:
 		res, err := s.apClient.GetLatestNPosts(ctx, author, limit)
 		if err != nil {
-			return nil, err
+			return toItems(cached), err
 		}
-		posts := make([]string, 0, len(res))
+		freshPosts = make([]clustering.Item, 0, len(res))
 		for _, p := range res {
 			if p.Text != "" {
-				posts = append(posts, p.Text)
+				freshPosts = append(freshPosts, clustering.Item{
+					ID:   p.ID,
+					Text: p.Text,
+				})
 			}
 		}
-		return posts, nil
 	case Nostr:
 		res, err := s.nostrClient.GetLatestNPosts(ctx, author, limit)
 		if err != nil {
-			return nil, err
+			return toItems(cached), err
 		}
-		posts := make([]string, 0, len(res))
+		freshPosts = make([]clustering.Item, 0, len(res))
 		for _, p := range res {
 			if p.Content != "" {
-				posts = append(posts, p.Content)
+				freshPosts = append(freshPosts, clustering.Item{
+					ID:   p.ID,
+					Text: p.Content,
+				})
 			}
 		}
-		return posts, nil
 	case Twitter:
 		res, err := s.twitterClient.GetLatestNPosts(ctx, author, limit)
 		if err != nil {
-			return nil, err
+			return toItems(cached), err
 		}
-		posts := make([]string, 0, len(res))
+		freshPosts = make([]clustering.Item, 0, len(res))
 		for _, p := range res {
 			if p.Content != "" {
-				posts = append(posts, p.Content)
+				freshPosts = append(freshPosts, clustering.Item{
+					ID:   p.ID,
+					Text: p.Content,
+				})
 			}
 		}
-		return posts, nil
 	default:
 		return nil, fmt.Errorf("platform %q is not supported yet", platform)
 	}
+
+	// 3. Upsert to cache (batch)
+	for _, post := range freshPosts {
+		if err := s.db.UpsertStylePosts(ctx, store.UpsertStylePostsParams{
+			UserID:   author,
+			Platform: platformStr,
+			PostID:   post.ID,
+			PostText: post.Text,
+		}); err != nil {
+			log.WarnWithContext(ctx, "failed to cache style post", "author", author, "platform", platform, "postID", post.ID, "error", err)
+		}
+	}
+
+	return freshPosts, nil
+}
+
+func toItems(rows []store.GetStylePostsRow) []clustering.Item {
+	items := make([]clustering.Item, len(rows))
+	for i, r := range rows {
+		items[i] = clustering.Item{ID: r.PostID, Text: r.PostText}
+	}
+	return items
 }
 
 func determinePlatform(author string) (platform, error) {
@@ -1552,5 +1792,16 @@ func parseActiveNetworks(raw string) []string {
 }
 
 func (s *Server) Start() error {
+	go s.startPostPruner()
 	return s.mcpHandler.Start(s.listenAddress, s.permissions)
 }
+
+func (s *Server) startPostPruner() {
+	ticker := time.NewTicker(24 * time.Hour)
+	defer ticker.Stop()
+	for range ticker.C {
+		if err := s.db.PruneStylePosts(context.Background()); err != nil {
+			log.Error("failed to prune style posts", "error", err)
+		}
+	}
+}

internal/server/types.go

@@ -151,3 +151,99 @@ func platformFromString(name string) (platform, bool) {
 		return -1, false
 	}
 }
+
+// --- Analytics types ---
+
+type AnalyticsRequest struct {
+	Author    string `json:"author" jsonschema_description:"Did or handle of an author"`
+	StartTime string `json:"startTime,omitempty" jsonschema_description:"Start time in RFC3339 format (default: 30 days ago)"`
+	EndTime   string `json:"endTime,omitempty" jsonschema_description:"End time in RFC3339 format (default: now)"`
+	Limit     int    `json:"limit,omitempty" jsonschema_description:"Maximum number of posts to analyze (default: 50, max: 200)"`
+	Platform  string `json:"platform,omitempty" jsonschema_description:"Platform to filter (default: all)"`
+}
+
+type EngagementMetricsResponse struct {
+	Author  string                    `json:"author" jsonschema_description:"Author identifier"`
+	Metrics []EngagementMetricPoint   `json:"metrics" jsonschema_description:"Engagement metrics per post"`
+}
+
+type EngagementMetricPoint struct {
+	PostID         string  `json:"postId" jsonschema_description:"Post identifier"`
+	Timestamp      string  `json:"timestamp" jsonschema_description:"RFC3339 timestamp"`
+	Likes          int64   `json:"likes" jsonschema_description:"Number of likes"`
+	Reposts        int64   `json:"reposts" jsonschema_description:"Number of reposts"`
+	Replies        int64   `json:"replies" jsonschema_description:"Number of replies"`
+	Quotes         int64   `json:"quotes" jsonschema_description:"Number of quotes"`
+	EngagementRate float64 `json:"engagementRate" jsonschema_description:"Engagement rate (interactions / impressions estimate)"`
+}
+
+type PostingPatternsResponse struct {
+	Author         string              `json:"author" jsonschema_description:"Author identifier"`
+	Heatmap        [][]int             `json:"heatmap" jsonschema_description:"24x7 matrix: hour (0-23) x day of week (0-6 = Sun-Sat)"`
+	PeakHours      []int               `json:"peakHours" jsonschema_description:"Top 3 hours with most posts (0-23)"`
+	PeakDays       []int               `json:"peakDays" jsonschema_description:"Top 3 days with most posts (0-6 = Sun-Sat)"`
+	AvgPostsPerDay float64             `json:"avgPostsPerDay" jsonschema_description:"Average posts per day"`
+	TotalPosts     int                 `json:"totalPosts" jsonschema_description:"Total posts in time range"`
+	PostingDays    int                 `json:"postingDays" jsonschema_description:"Number of days with at least one post"`
+}
+
+type TopicModelingResponse struct {
+	Author  string         `json:"author" jsonschema_description:"Author identifier"`
+	Topics  []TopicCluster `json:"topics" jsonschema_description:"Identified topic clusters"`
+}
+
+type TopicCluster struct {
+	TopicID     int      `json:"topicId" jsonschema_description:"Cluster identifier"`
+	Label       string   `json:"label" jsonschema_description:"Human-readable topic label"`
+	Keywords    []string `json:"keywords" jsonschema_description:"Top keywords for this topic"`
+	PostCount   int      `json:"postCount" jsonschema_description:"Number of posts in this topic"`
+	Percentage  float64  `json:"percentage" jsonschema_description:"Percentage of total posts"`
+	SamplePosts []string `json:"samplePosts" jsonschema_description:"Sample post texts (max 3)"`
+}
+
+type SentimentTrendsResponse struct {
+	Author          string              `json:"author" jsonschema_description:"Author identifier"`
+	TimeSeries      []SentimentPoint    `json:"timeSeries" jsonschema_description:"Sentiment over time"`
+	OverallSentiment SentimentSummary   `json:"overallSentiment" jsonschema_description:"Overall sentiment summary"`
+	DominantEmotions []EmotionScore     `json:"dominantEmotions" jsonschema_description:"Most frequent emotions"`
+	SentimentShifts  []SentimentShift   `json:"sentimentShifts" jsonschema_description:"Significant sentiment changes"`
+}
+
+type SentimentPoint struct {
+	Timestamp     string  `json:"timestamp" jsonschema_description:"RFC3339 timestamp (bucketed by day)"`
+	Positive      float64 `json:"positive" jsonschema_description:"Positive sentiment ratio (0-1)"`
+	Negative      float64 `json:"negative" jsonschema_description:"Negative sentiment ratio (0-1)"`
+	Neutral       float64 `json:"neutral" jsonschema_description:"Neutral sentiment ratio (0-1)"`
+	PostCount     int     `json:"postCount" jsonschema_description:"Posts in this time bucket"`
+}
+
+type SentimentSummary struct {
+	Positive float64 `json:"positive" jsonschema_description:"Overall positive ratio"`
+	Negative float64 `json:"negative" jsonschema_description:"Overall negative ratio"`
+	Neutral  float64 `json:"neutral" jsonschema_description:"Overall neutral ratio"`
+}
+
+type EmotionScore struct {
+	Emotion string  `json:"emotion" jsonschema_description:"Emotion name"`
+	Score   float64 `json:"score" jsonschema_description:"Frequency score (0-1)"`
+}
+
+type SentimentShift struct {
+	Timestamp    string  `json:"timestamp" jsonschema_description:"When the shift occurred"`
+	FromSentiment string `json:"fromSentiment" jsonschema_description:"Previous dominant sentiment"`
+	ToSentiment   string  `json:"toSentiment" jsonschema_description:"New dominant sentiment"`
+	Magnitude     float64 `json:"magnitude" jsonschema_description:"Shift magnitude (0-1)"`
+}
+
+type EngagementDriversResponse struct {
+	Author   string               `json:"author" jsonschema_description:"Author identifier"`
+	Drivers  []EngagementDriver   `json:"drivers" jsonschema_description:"Topics/keywords driving engagement"`
+}
+
+type EngagementDriver struct {
+	Topic           string  `json:"topic" jsonschema_description:"Topic or keyword"`
+	AvgEngagement   float64 `json:"avgEngagement" jsonschema_description:"Average engagement rate for posts with this topic"`
+	Correlation     float64 `json:"correlation" jsonschema_description:"Correlation coefficient with engagement (-1 to 1)"`
+	PostCount       int     `json:"postCount" jsonschema_description:"Number of posts containing this topic"`
+	SamplePosts     []string `json:"samplePosts" jsonschema_description:"Sample posts (max 2)"`
+}

internal/server/webhook.go

@@ -25,7 +25,7 @@ func newWebhookSender(cfg *config.Config, m *MetricsMiddleware) *WebhookSender {
 	}
 
 	return &WebhookSender{
-		cfg:    cfg,
+		cfg:     cfg,
 		metrics: m,
 		httpCli: &http.Client{Timeout: 10 * time.Second},
 		server:  cfg.MatrixServerID,
@@ -38,7 +38,7 @@ func (wh *WebhookSender) Send(ctx context.Context, jsonBytes []byte) {
 		return
 	}
 
-	if jsonBytes == nil || len(jsonBytes) == 0 {
+	if len(jsonBytes) == 0 {
 		log.ErrorWithContext(ctx, "webhook: empty payload ignored")
 		return
 	}

internal/store/AnalyticsCache.sql.go

@@ -0,0 +1,96 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: AnalyticsCache.sql
+
+package store
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+)
+
+const deleteAnalyticsCache = `-- name: DeleteAnalyticsCache :exec
+DELETE FROM analytics_cache
+WHERE user_id = $1 AND platform = $2 AND tool_name = $3 AND time_range_hash = $4
+`
+
+type DeleteAnalyticsCacheParams struct {
+	UserID        string
+	Platform      string
+	ToolName      string
+	TimeRangeHash string
+}
+
+func (q *Queries) DeleteAnalyticsCache(ctx context.Context, arg DeleteAnalyticsCacheParams) error {
+	_, err := q.db.ExecContext(ctx, deleteAnalyticsCache,
+		arg.UserID,
+		arg.Platform,
+		arg.ToolName,
+		arg.TimeRangeHash,
+	)
+	return err
+}
+
+const getAnalyticsCache = `-- name: GetAnalyticsCache :one
+SELECT result FROM analytics_cache
+WHERE user_id = $1 AND platform = $2 AND tool_name = $3 AND time_range_hash = $4
+  AND expires_at > now()
+`
+
+type GetAnalyticsCacheParams struct {
+	UserID        string
+	Platform      string
+	ToolName      string
+	TimeRangeHash string
+}
+
+func (q *Queries) GetAnalyticsCache(ctx context.Context, arg GetAnalyticsCacheParams) (json.RawMessage, error) {
+	row := q.db.QueryRowContext(ctx, getAnalyticsCache,
+		arg.UserID,
+		arg.Platform,
+		arg.ToolName,
+		arg.TimeRangeHash,
+	)
+	var result json.RawMessage
+	err := row.Scan(&result)
+	return result, err
+}
+
+const pruneAnalyticsCache = `-- name: PruneAnalyticsCache :exec
+DELETE FROM analytics_cache WHERE expires_at <= now()
+`
+
+func (q *Queries) PruneAnalyticsCache(ctx context.Context) error {
+	_, err := q.db.ExecContext(ctx, pruneAnalyticsCache)
+	return err
+}
+
+const upsertAnalyticsCache = `-- name: UpsertAnalyticsCache :exec
+INSERT INTO analytics_cache (user_id, platform, tool_name, time_range_hash, result, expires_at)
+VALUES ($1, $2, $3, $4, $5, $6)
+ON CONFLICT (user_id, platform, tool_name, time_range_hash)
+DO UPDATE SET result = EXCLUDED.result, expires_at = EXCLUDED.expires_at, computed_at = now()
+`
+
+type UpsertAnalyticsCacheParams struct {
+	UserID        string
+	Platform      string
+	ToolName      string
+	TimeRangeHash string
+	Result        json.RawMessage
+	ExpiresAt     time.Time
+}
+
+func (q *Queries) UpsertAnalyticsCache(ctx context.Context, arg UpsertAnalyticsCacheParams) error {
+	_, err := q.db.ExecContext(ctx, upsertAnalyticsCache,
+		arg.UserID,
+		arg.Platform,
+		arg.ToolName,
+		arg.TimeRangeHash,
+		arg.Result,
+		arg.ExpiresAt,
+	)
+	return err
+}

internal/store/AnalyticsCoverage.sql.go

@@ -0,0 +1,59 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: AnalyticsCoverage.sql
+
+package store
+
+import (
+	"context"
+	"time"
+)
+
+const getAnalyticsCoverage = `-- name: GetAnalyticsCoverage :one
+SELECT covered_start, covered_end FROM analytics_coverage
+WHERE user_id = $1 AND platform = $2
+`
+
+type GetAnalyticsCoverageParams struct {
+	UserID   string
+	Platform string
+}
+
+type GetAnalyticsCoverageRow struct {
+	CoveredStart time.Time
+	CoveredEnd   time.Time
+}
+
+func (q *Queries) GetAnalyticsCoverage(ctx context.Context, arg GetAnalyticsCoverageParams) (GetAnalyticsCoverageRow, error) {
+	row := q.db.QueryRowContext(ctx, getAnalyticsCoverage, arg.UserID, arg.Platform)
+	var i GetAnalyticsCoverageRow
+	err := row.Scan(&i.CoveredStart, &i.CoveredEnd)
+	return i, err
+}
+
+const upsertAnalyticsCoverage = `-- name: UpsertAnalyticsCoverage :exec
+INSERT INTO analytics_coverage (user_id, platform, covered_start, covered_end, updated_at)
+VALUES ($1, $2, $3, $4, now())
+ON CONFLICT (user_id, platform)
+DO UPDATE SET covered_start = LEAST(analytics_coverage.covered_start, EXCLUDED.covered_start),
+              covered_end = GREATEST(analytics_coverage.covered_end, EXCLUDED.covered_end),
+              updated_at = now()
+`
+
+type UpsertAnalyticsCoverageParams struct {
+	UserID       string
+	Platform     string
+	CoveredStart time.Time
+	CoveredEnd   time.Time
+}
+
+func (q *Queries) UpsertAnalyticsCoverage(ctx context.Context, arg UpsertAnalyticsCoverageParams) error {
+	_, err := q.db.ExecContext(ctx, upsertAnalyticsCoverage,
+		arg.UserID,
+		arg.Platform,
+		arg.CoveredStart,
+		arg.CoveredEnd,
+	)
+	return err
+}

internal/store/AnalyticsPosts.sql.go

@@ -0,0 +1,113 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: AnalyticsPosts.sql
+
+package store
+
+import (
+	"context"
+	"time"
+)
+
+const getAnalyticsPostsInRange = `-- name: GetAnalyticsPostsInRange :many
+SELECT post_id, post_text, post_timestamp, likes, reposts, replies, quotes
+FROM analytics_posts
+WHERE user_id = $1 AND platform = $2 AND post_timestamp >= $3 AND post_timestamp <= $4
+ORDER BY post_timestamp DESC
+LIMIT $5
+`
+
+type GetAnalyticsPostsInRangeParams struct {
+	UserID          string
+	Platform        string
+	PostTimestamp   time.Time
+	PostTimestamp_2 time.Time
+	Limit           int32
+}
+
+type GetAnalyticsPostsInRangeRow struct {
+	PostID        string
+	PostText      string
+	PostTimestamp time.Time
+	Likes         int64
+	Reposts       int64
+	Replies       int64
+	Quotes        int64
+}
+
+func (q *Queries) GetAnalyticsPostsInRange(ctx context.Context, arg GetAnalyticsPostsInRangeParams) ([]GetAnalyticsPostsInRangeRow, error) {
+	rows, err := q.db.QueryContext(ctx, getAnalyticsPostsInRange,
+		arg.UserID,
+		arg.Platform,
+		arg.PostTimestamp,
+		arg.PostTimestamp_2,
+		arg.Limit,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []GetAnalyticsPostsInRangeRow
+	for rows.Next() {
+		var i GetAnalyticsPostsInRangeRow
+		if err := rows.Scan(
+			&i.PostID,
+			&i.PostText,
+			&i.PostTimestamp,
+			&i.Likes,
+			&i.Reposts,
+			&i.Replies,
+			&i.Quotes,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const upsertAnalyticsPosts = `-- name: UpsertAnalyticsPosts :exec
+INSERT INTO analytics_posts (user_id, platform, post_id, post_text, post_timestamp, likes, reposts, replies, quotes)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+ON CONFLICT (user_id, platform, post_id)
+DO UPDATE SET post_text = EXCLUDED.post_text,
+              post_timestamp = EXCLUDED.post_timestamp,
+              likes = EXCLUDED.likes,
+              reposts = EXCLUDED.reposts,
+              replies = EXCLUDED.replies,
+              quotes = EXCLUDED.quotes
+`
+
+type UpsertAnalyticsPostsParams struct {
+	UserID        string
+	Platform      string
+	PostID        string
+	PostText      string
+	PostTimestamp time.Time
+	Likes         int64
+	Reposts       int64
+	Replies       int64
+	Quotes        int64
+}
+
+func (q *Queries) UpsertAnalyticsPosts(ctx context.Context, arg UpsertAnalyticsPostsParams) error {
+	_, err := q.db.ExecContext(ctx, upsertAnalyticsPosts,
+		arg.UserID,
+		arg.Platform,
+		arg.PostID,
+		arg.PostText,
+		arg.PostTimestamp,
+		arg.Likes,
+		arg.Reposts,
+		arg.Replies,
+		arg.Quotes,
+	)
+	return err
+}

internal/store/DeleteStylePosts.sql.go

@@ -0,0 +1,25 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: DeleteStylePosts.sql
+
+package store
+
+import (
+	"context"
+)
+
+const deleteStylePosts = `-- name: DeleteStylePosts :exec
+DELETE FROM user_style_posts 
+WHERE user_id = $1 AND platform = $2 AND platform != 'Twitter'
+`
+
+type DeleteStylePostsParams struct {
+	UserID   string
+	Platform string
+}
+
+func (q *Queries) DeleteStylePosts(ctx context.Context, arg DeleteStylePostsParams) error {
+	_, err := q.db.ExecContext(ctx, deleteStylePosts, arg.UserID, arg.Platform)
+	return err
+}

internal/store/FindSimilarUsers.sql.go

@@ -20,14 +20,14 @@ LIMIT $2
 `
 
 type FindSimilarUsersParams struct {
-	QueryEmbedding any
+	QueryEmbedding interface{}
 	LimitVal       int32
 }
 
 type FindSimilarUsersRow struct {
 	UserID       string
 	Platform     string
-	Embedding    any
+	Embedding    interface{}
 	TopKeywords  []string
 	StyleSummary string
 	PostCount    int32

internal/store/GetStylePostByID.sql.go

@@ -0,0 +1,33 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: GetStylePostByID.sql
+
+package store
+
+import (
+	"context"
+)
+
+const getStylePostByID = `-- name: GetStylePostByID :one
+SELECT post_id, post_text FROM user_style_posts
+WHERE user_id = $1 AND platform = $2 AND post_id = $3
+`
+
+type GetStylePostByIDParams struct {
+	UserID   string
+	Platform string
+	PostID   string
+}
+
+type GetStylePostByIDRow struct {
+	PostID   string
+	PostText string
+}
+
+func (q *Queries) GetStylePostByID(ctx context.Context, arg GetStylePostByIDParams) (GetStylePostByIDRow, error) {
+	row := q.db.QueryRowContext(ctx, getStylePostByID, arg.UserID, arg.Platform, arg.PostID)
+	var i GetStylePostByIDRow
+	err := row.Scan(&i.PostID, &i.PostText)
+	return i, err
+}

internal/store/GetStylePosts.sql.go

@@ -0,0 +1,51 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: GetStylePosts.sql
+
+package store
+
+import (
+	"context"
+)
+
+const getStylePosts = `-- name: GetStylePosts :many
+SELECT post_id, post_text FROM user_style_posts
+WHERE user_id = $1 AND platform = $2
+ORDER BY created_at DESC
+LIMIT $3
+`
+
+type GetStylePostsParams struct {
+	UserID   string
+	Platform string
+	Limit    int32
+}
+
+type GetStylePostsRow struct {
+	PostID   string
+	PostText string
+}
+
+func (q *Queries) GetStylePosts(ctx context.Context, arg GetStylePostsParams) ([]GetStylePostsRow, error) {
+	rows, err := q.db.QueryContext(ctx, getStylePosts, arg.UserID, arg.Platform, arg.Limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []GetStylePostsRow
+	for rows.Next() {
+		var i GetStylePostsRow
+		if err := rows.Scan(&i.PostID, &i.PostText); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}

internal/store/GetStylePostsByIDs.sql.go

@@ -0,0 +1,51 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: GetStylePostsByIDs.sql
+
+package store
+
+import (
+	"context"
+
+	"github.com/lib/pq"
+)
+
+const getStylePostsByIDs = `-- name: GetStylePostsByIDs :many
+SELECT post_id, post_text FROM user_style_posts
+WHERE user_id = $1 AND platform = $2 AND post_id = ANY($3::text[])
+`
+
+type GetStylePostsByIDsParams struct {
+	UserID   string
+	Platform string
+	Column3  []string
+}
+
+type GetStylePostsByIDsRow struct {
+	PostID   string
+	PostText string
+}
+
+func (q *Queries) GetStylePostsByIDs(ctx context.Context, arg GetStylePostsByIDsParams) ([]GetStylePostsByIDsRow, error) {
+	rows, err := q.db.QueryContext(ctx, getStylePostsByIDs, arg.UserID, arg.Platform, pq.Array(arg.Column3))
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []GetStylePostsByIDsRow
+	for rows.Next() {
+		var i GetStylePostsByIDsRow
+		if err := rows.Scan(&i.PostID, &i.PostText); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}

internal/store/PruneStylePosts.sql.go

@@ -0,0 +1,20 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: PruneStylePosts.sql
+
+package store
+
+import (
+	"context"
+)
+
+const pruneStylePosts = `-- name: PruneStylePosts :exec
+DELETE FROM user_style_posts 
+WHERE created_at < now() - interval '7 days' AND platform != 'Twitter'
+`
+
+func (q *Queries) PruneStylePosts(ctx context.Context) error {
+	_, err := q.db.ExecContext(ctx, pruneStylePosts)
+	return err
+}

internal/store/UpsertStylePosts.sql.go

@@ -0,0 +1,34 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: UpsertStylePosts.sql
+
+package store
+
+import (
+	"context"
+)
+
+const upsertStylePosts = `-- name: UpsertStylePosts :exec
+INSERT INTO user_style_posts (user_id, platform, post_id, post_text)
+VALUES ($1, $2, $3, $4)
+ON CONFLICT (user_id, platform, post_id) 
+DO UPDATE SET post_text = EXCLUDED.post_text, created_at = now()
+`
+
+type UpsertStylePostsParams struct {
+	UserID   string
+	Platform string
+	PostID   string
+	PostText string
+}
+
+func (q *Queries) UpsertStylePosts(ctx context.Context, arg UpsertStylePostsParams) error {
+	_, err := q.db.ExecContext(ctx, upsertStylePosts,
+		arg.UserID,
+		arg.Platform,
+		arg.PostID,
+		arg.PostText,
+	)
+	return err
+}

internal/store/UpsertStyleProfiles.sql.go

@@ -26,7 +26,7 @@ DO UPDATE SET
 type UpsertStyleProfileParams struct {
 	UserID       string
 	Platform     string
-	Embedding    any
+	Embedding    interface{}
 	TopKeywords  []string
 	StyleSummary string
 	PostCount    int32

internal/store/db.go

@@ -10,10 +10,10 @@ import (
 )
 
 type DBTX interface {
-	ExecContext(context.Context, string, ...any) (sql.Result, error)
+	ExecContext(context.Context, string, ...interface{}) (sql.Result, error)
 	PrepareContext(context.Context, string) (*sql.Stmt, error)
-	QueryContext(context.Context, string, ...any) (*sql.Rows, error)
-	QueryRowContext(context.Context, string, ...any) *sql.Row
+	QueryContext(context.Context, string, ...interface{}) (*sql.Rows, error)
+	QueryRowContext(context.Context, string, ...interface{}) *sql.Row
 }
 
 func New(db DBTX) *Queries {

internal/store/integration_test.go

@@ -35,7 +35,7 @@ func TestStoreRoundTrip(t *testing.T) {
 	q := New(conn)
 
 	uid := fmt.Sprintf("test_%d", time.Now().UnixNano())
-	emb := "[" + strings.TrimSuffix(strings.Repeat("0.0,", 768), ",") + "]"
+	emb := "[" + strings.TrimSuffix(strings.Repeat("0.0,", 1024), ",") + "]"
 
 	if err := q.UpsertStyleProfile(ctx, UpsertStyleProfileParams{
 		UserID:       uid,

internal/store/models.go

@@ -1,13 +1,48 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.30.0
+//   sqlc v1.31.1
 
 package store
 
 import (
 	"database/sql"
+	"encoding/json"
+	"time"
 )
 
+type AnalyticsCache struct {
+	ID            int64
+	UserID        string
+	Platform      string
+	ToolName      string
+	TimeRangeHash string
+	Result        json.RawMessage
+	ComputedAt    time.Time
+	ExpiresAt     time.Time
+}
+
+type AnalyticsCoverage struct {
+	UserID       string
+	Platform     string
+	CoveredStart time.Time
+	CoveredEnd   time.Time
+	UpdatedAt    time.Time
+}
+
+type AnalyticsPost struct {
+	ID            int64
+	UserID        string
+	Platform      string
+	PostID        string
+	PostText      string
+	PostTimestamp time.Time
+	Likes         int64
+	Reposts       int64
+	Replies       int64
+	Quotes        int64
+	CreatedAt     time.Time
+}
+
 type Transaction struct {
 	ID                  int64
 	X402TransactionHash string
@@ -19,11 +54,20 @@ type Transaction struct {
 	CreatedAt           sql.NullTime
 }
 
+type UserStylePost struct {
+	ID        int64
+	UserID    string
+	Platform  string
+	PostID    string
+	PostText  string
+	CreatedAt time.Time
+}
+
 type UserStyleProfile struct {
 	ID               int64
 	UserID           string
 	Platform         string
-	Embedding        any
+	Embedding        interface{}
 	TopKeywords      []string
 	StyleSummary     string
 	PostCount        int32

internal/utils/styleProfiles.go

@@ -38,11 +38,9 @@ func ParseEmbedding(value any) ([]float64, error) {
 		return vec, nil
 
 	case string:
-		// pgvector returns a string like "[0.12, 0.53, ...]" sometimes
 		return parseVectorString(v)
 
 	case []byte:
-		// lib/pq returns unknown-type columns (e.g. vector) as []byte
 		return parseVectorString(string(v))
 
 	default:
@@ -76,7 +74,7 @@ func AverageVector(vs [][]float64) []float64 {
 func TopWords(posts []string, stopWords map[string]struct{}, limit int) []string {
 	counts := map[string]int{}
 	for _, p := range posts {
-		for _, w := range strings.Fields(strings.ToLower(p)) {
+		for w := range strings.FieldsSeq(strings.ToLower(p)) {
 			if len(w) < 4 {
 				continue
 			}

scripts/fund-wallet.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+set -euo pipefail
+
+echo "=== Funding Wallet with Base Sepolia USDC ==="
+
+# Required environment variables
+: "${PRIVATE_KEY:?PRIVATE_KEY must be set}"
+: "${FUNDING_FAUCET_URL:?FUNDING_FAUCET_URL must be set}"
+
+WALLET_ADDRESS=$(cast wallet address --private-key "$PRIVATE_KEY")
+echo "Wallet address: $WALLET_ADDRESS"
+
+# Check current USDC balance
+USDC_CONTRACT="0x036CbD53842c5426634e7929541eC2318f3dCF7e"
+RPC_URL="https://sepolia.base.org"
+
+BALANCE=$(cast call "$USDC_CONTRACT" "balanceOf(address)(uint256)" "$WALLET_ADDRESS" --rpc-url "$RPC_URL" 2>/dev/null || echo "0")
+BALANCE_DECIMAL=$(cast to-dec "$BALANCE" 2>/dev/null || echo "0")
+BALANCE_USDC=$(echo "scale=6; $BALANCE_DECIMAL / 1000000" | bc 2>/dev/null || echo "0")
+
+echo "Current USDC balance: $BALANCE_USDC USDC"
+
+# If balance is less than 10 USDC, request from faucet
+if (( $(echo "$BALANCE_USDC < 10" | bc -l) )); then
+  echo "Balance below 10 USDC, requesting from faucet..."
+  
+  # Request from faucet (Coinbase CDP faucet API format)
+  curl -X POST "$FUNDING_FAUCET_URL" \
+    -H "Content-Type: application/json" \
+    -d "{\"address\": \"$WALLET_ADDRESS\", \"token\": \"USDC\"}" \
+    || echo "Faucet request failed, may need manual funding"
+  
+  # Wait for funding
+  echo "Waiting for funding..."
+  sleep 30
+  
+  # Check balance again
+  BALANCE=$(cast call "$USDC_CONTRACT" "balanceOf(address)(uint256)" "$WALLET_ADDRESS" --rpc-url "$RPC_URL" 2>/dev/null || echo "0")
+  BALANCE_DECIMAL=$(cast to-dec "$BALANCE" 2>/dev/null || echo "0")
+  BALANCE_USDC=$(echo "scale=6; $BALANCE_DECIMAL / 1000000" | bc 2>/dev/null || echo "0")
+  echo "New USDC balance: $BALANCE_USDC USDC"
+else
+  echo "Sufficient USDC balance"
+fi
+
+# Also fund with ETH for gas
+ETH_BALANCE=$(cast balance "$WALLET_ADDRESS" --rpc-url "$RPC_URL" 2>/dev/null || echo "0")
+ETH_BALANCE_DECIMAL=$(cast to-dec "$ETH_BALANCE" 2>/dev/null || echo "0")
+ETH_BALANCE_ETH=$(echo "scale=6; $ETH_BALANCE_DECIMAL / 1000000000000000000" | bc 2>/dev/null || echo "0")
+
+echo "Current ETH balance: $ETH_BALANCE_ETH ETH"
+
+if (( $(echo "$ETH_BALANCE_ETH < 0.01" | bc -l) )); then
+  echo "ETH balance low, requesting from faucet..."
+  curl -X POST "$FUNDING_FAUCET_URL" \
+    -H "Content-Type: application/json" \
+    -d "{\"address\": \"$WALLET_ADDRESS\", \"token\": \"ETH\"}" \
+    || echo "ETH faucet request failed"
+  sleep 10
+fi
+
+echo "=== Wallet Funding Complete ==="

scripts/start-test-server.sh

@@ -0,0 +1,83 @@
+#!/bin/bash
+set -euo pipefail
+
+echo "=== Starting Test Server ==="
+
+# Required environment variables
+: "${PRIVATE_KEY:?PRIVATE_KEY must be set}"
+: "${X402_WALLET_ADDRESS:?X402_WALLET_ADDRESS must be set}"
+
+# Set up environment for local testing
+export SERVER_ADDRESS="127.0.0.1"
+export SERVER_PORT="8080"
+export GOOSE_DBSTRING="postgres://postgres:postgres@localhost:5432/mcpserver?sslmode=disable"
+export ACTIVE_NETWORKS="sepolia"
+export X402_FACILITATOR_URL="https://api.cdp.coinbase.com/platform/v2/x402"
+export X402_WALLET_ADDRESS="$X402_WALLET_ADDRESS"
+export OLLAMA_HOST="http://localhost:11434"
+export MIGRATE_ON_START="true"
+export MIGRATIONS_DIR="sql/schema"
+export READYZ_PORT="9090"
+export METRICS_PORT="9091"
+export LOG_FILE="/tmp/mcpserver-test.log"
+export LOG_LEVEL="debug"
+
+# Use test credentials or empty for local testing
+export BLUESKY_DID="${BLUESKY_DID:-}"
+export BLUESKY_APP_PASSWORD="${BLUESKY_APP_PASSWORD:-}"
+export BLUESKY_HOST="${BLUESKY_HOST:-https://bsky.social}"
+export AP_HOST="${AP_HOST:-https://mastodon.social}"
+export AP_ACCESS_TOKEN="${AP_ACCESS_TOKEN:-}"
+export NOSTR_RELAYS="${NOSTR_RELAYS:-wss://relay.damus.io,wss://nos.lol}"
+export TWITTER_BEARER_TOKEN="${TWITTER_BEARER_TOKEN:-}"
+export CDP_API_KEY_ID="${CDP_API_KEY_ID:-}"
+export CDP_API_SECRET="${CDP_API_SECRET:-}"
+export ENRICH_CROSS_PLATFORM="false"
+export PREWARM_AUTHORS=""
+export PREWARM_FEED_URI=""
+
+# Start the server in background
+echo "Starting server on port 8080..."
+go run ./cmd/server/main.go &
+SERVER_PID=$!
+
+# Save PID for cleanup
+echo $SERVER_PID > /tmp/test-server.pid
+
+# Wait for server to be ready
+echo "Waiting for server to be ready..."
+for i in {1..30}; do
+  if curl -sf http://localhost:9090/readyz >/dev/null 2>&1; then
+    echo "Server is ready"
+    break
+  fi
+  sleep 1
+done
+
+# Verify server is responding
+curl -sf http://localhost:8080/healthz >/dev/null 2>&1 || {
+  echo "Server health check failed"
+  kill $SERVER_PID 2>/dev/null || true
+  exit 1
+}
+
+# Verify payment endpoints are working (should return 402 without payment)
+echo "Verifying payment endpoints..."
+if curl -sf -X POST http://localhost:8080/v1/getActor \
+  -H "Content-Type: application/json" \
+  -d '{"author": "did:plc:z72i7hdynmk6r22z27h6tvur"}' >/dev/null 2>&1; then
+  echo "WARNING: Payable endpoint getActor returned 200 without payment!"
+else
+  echo "Payment endpoint getActor correctly requires payment (402)"
+fi
+
+# Verify free endpoint works
+if curl -sf -X POST http://localhost:8080/v1/getFeed \
+  -H "Content-Type: application/json" \
+  -d '{"uri": "https://bsky.app/profile/did:plc:z72i7hdynmk6r22z27h6tvur/feed/whats-hot"}' >/dev/null 2>&1; then
+  echo "Free endpoint getFeed works correctly"
+else
+  echo "WARNING: Free endpoint getFeed failed!"
+fi
+
+echo "=== Test Server Started (PID: $SERVER_PID) ==="

sql/queries/AnalyticsCache.sql

@@ -0,0 +1,17 @@
+-- name: GetAnalyticsCache :one
+SELECT result FROM analytics_cache
+WHERE user_id = $1 AND platform = $2 AND tool_name = $3 AND time_range_hash = $4
+  AND expires_at > now();
+
+-- name: UpsertAnalyticsCache :exec
+INSERT INTO analytics_cache (user_id, platform, tool_name, time_range_hash, result, expires_at)
+VALUES ($1, $2, $3, $4, $5, $6)
+ON CONFLICT (user_id, platform, tool_name, time_range_hash)
+DO UPDATE SET result = EXCLUDED.result, expires_at = EXCLUDED.expires_at, computed_at = now();
+
+-- name: DeleteAnalyticsCache :exec
+DELETE FROM analytics_cache
+WHERE user_id = $1 AND platform = $2 AND tool_name = $3 AND time_range_hash = $4;
+
+-- name: PruneAnalyticsCache :exec
+DELETE FROM analytics_cache WHERE expires_at <= now();

sql/queries/AnalyticsCoverage.sql

@@ -0,0 +1,11 @@
+-- name: GetAnalyticsCoverage :one
+SELECT covered_start, covered_end FROM analytics_coverage
+WHERE user_id = $1 AND platform = $2;
+
+-- name: UpsertAnalyticsCoverage :exec
+INSERT INTO analytics_coverage (user_id, platform, covered_start, covered_end, updated_at)
+VALUES ($1, $2, $3, $4, now())
+ON CONFLICT (user_id, platform)
+DO UPDATE SET covered_start = LEAST(analytics_coverage.covered_start, EXCLUDED.covered_start),
+              covered_end = GREATEST(analytics_coverage.covered_end, EXCLUDED.covered_end),
+              updated_at = now();

sql/queries/AnalyticsPosts.sql

@@ -0,0 +1,17 @@
+-- name: GetAnalyticsPostsInRange :many
+SELECT post_id, post_text, post_timestamp, likes, reposts, replies, quotes
+FROM analytics_posts
+WHERE user_id = $1 AND platform = $2 AND post_timestamp >= $3 AND post_timestamp <= $4
+ORDER BY post_timestamp DESC
+LIMIT $5;
+
+-- name: UpsertAnalyticsPosts :exec
+INSERT INTO analytics_posts (user_id, platform, post_id, post_text, post_timestamp, likes, reposts, replies, quotes)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+ON CONFLICT (user_id, platform, post_id)
+DO UPDATE SET post_text = EXCLUDED.post_text,
+              post_timestamp = EXCLUDED.post_timestamp,
+              likes = EXCLUDED.likes,
+              reposts = EXCLUDED.reposts,
+              replies = EXCLUDED.replies,
+              quotes = EXCLUDED.quotes;

sql/queries/DeleteStylePosts.sql

@@ -0,0 +1,3 @@
+-- name: DeleteStylePosts :exec
+DELETE FROM user_style_posts 
+WHERE user_id = $1 AND platform = $2 AND platform != 'Twitter';

sql/queries/GetStylePostByID.sql

@@ -0,0 +1,3 @@
+-- name: GetStylePostByID :one
+SELECT post_id, post_text FROM user_style_posts
+WHERE user_id = $1 AND platform = $2 AND post_id = $3;

sql/queries/GetStylePosts.sql

@@ -0,0 +1,5 @@
+-- name: GetStylePosts :many
+SELECT post_id, post_text FROM user_style_posts
+WHERE user_id = $1 AND platform = $2
+ORDER BY created_at DESC
+LIMIT $3;

sql/queries/GetStylePostsByIDs.sql

@@ -0,0 +1,3 @@
+-- name: GetStylePostsByIDs :many
+SELECT post_id, post_text FROM user_style_posts
+WHERE user_id = $1 AND platform = $2 AND post_id = ANY($3::text[]);

sql/queries/PruneStylePosts.sql

@@ -0,0 +1,3 @@
+-- name: PruneStylePosts :exec
+DELETE FROM user_style_posts 
+WHERE created_at < now() - interval '7 days' AND platform != 'Twitter';

sql/queries/UpsertStylePosts.sql

@@ -0,0 +1,5 @@
+-- name: UpsertStylePosts :exec
+INSERT INTO user_style_posts (user_id, platform, post_id, post_text)
+VALUES ($1, $2, $3, $4)
+ON CONFLICT (user_id, platform, post_id) 
+DO UPDATE SET post_text = EXCLUDED.post_text, created_at = now();

sql/schema/001_transactions.sql

@@ -1,5 +1,5 @@
 -- +goose up
-CREATE TABLE transactions (
+CREATE TABLE IF NOT EXISTS transactions (
     id BIGSERIAL PRIMARY KEY,
     x402_transaction_hash VARCHAR(255) NOT NULL UNIQUE,
     amount NUMERIC NOT NULL,

sql/schema/002_user_style_profiles.sql

@@ -1,11 +1,11 @@
 -- +goose up
 CREATE EXTENSION IF NOT EXISTS vector;
 
-CREATE TABLE user_style_profiles (
+CREATE TABLE IF NOT EXISTS user_style_profiles (
     id BIGSERIAL PRIMARY KEY,
     user_id TEXT NOT NULL,
     platform TEXT NOT NULL,
-    embedding VECTOR(768) NOT NULL,
+    embedding VECTOR(1024) NOT NULL,
     top_keywords TEXT[] NOT NULL,
     style_summary TEXT NOT NULL,
     post_count INTEGER NOT NULL,

sql/schema/003_add_cache_version.sql

@@ -4,7 +4,7 @@ ALTER TABLE user_style_profiles
   ADD COLUMN schema_version INTEGER NOT NULL DEFAULT 1,
   ADD COLUMN algorithm_version INTEGER NOT NULL DEFAULT 1;
 
-CREATE INDEX idx_user_style_profiles_versions 
+CREATE INDEX IF NOT EXISTS idx_user_style_profiles_versions 
   ON user_style_profiles (model_version, schema_version, algorithm_version);
 
 -- +goose Down

sql/schema/004_add_style_posts.sql

@@ -0,0 +1,17 @@
+-- +goose up
+CREATE TABLE IF NOT EXISTS user_style_posts (
+    id BIGSERIAL PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    platform TEXT NOT NULL,
+    post_id TEXT NOT NULL,
+    post_text TEXT NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE (user_id, platform, post_id)
+);
+
+CREATE INDEX idx_user_style_posts_user_platform 
+  ON user_style_posts (user_id, platform);
+
+-- +goose down
+DROP INDEX IF EXISTS idx_user_style_posts_user_platform;
+DROP TABLE IF EXISTS user_style_posts;

sql/schema/005_add_analytics_cache.sql

@@ -0,0 +1,23 @@
+-- +goose up
+CREATE TABLE IF NOT EXISTS analytics_cache (
+    id BIGSERIAL PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    platform TEXT NOT NULL,
+    tool_name TEXT NOT NULL,
+    time_range_hash TEXT NOT NULL,
+    result JSONB NOT NULL,
+    computed_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    expires_at TIMESTAMPTZ NOT NULL,
+    UNIQUE (user_id, platform, tool_name, time_range_hash)
+);
+
+CREATE INDEX IF NOT EXISTS idx_analytics_cache_lookup 
+  ON analytics_cache (user_id, platform, tool_name, time_range_hash);
+
+CREATE INDEX IF NOT EXISTS idx_analytics_cache_expires 
+  ON analytics_cache (expires_at);
+
+-- +goose down
+DROP INDEX IF EXISTS idx_analytics_cache_expires;
+DROP INDEX IF EXISTS idx_analytics_cache_lookup;
+DROP TABLE IF EXISTS analytics_cache;

sql/schema/006_add_analytics_posts.sql

@@ -0,0 +1,22 @@
+-- +goose up
+CREATE TABLE IF NOT EXISTS analytics_posts (
+    id BIGSERIAL PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    platform TEXT NOT NULL,
+    post_id TEXT NOT NULL,
+    post_text TEXT NOT NULL,
+    post_timestamp TIMESTAMPTZ NOT NULL,
+    likes BIGINT NOT NULL DEFAULT 0,
+    reposts BIGINT NOT NULL DEFAULT 0,
+    replies BIGINT NOT NULL DEFAULT 0,
+    quotes BIGINT NOT NULL DEFAULT 0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE (user_id, platform, post_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_analytics_posts_user_platform_time
+    ON analytics_posts (user_id, platform, post_timestamp);
+
+-- +goose down
+DROP INDEX IF EXISTS idx_analytics_posts_user_platform_time;
+DROP TABLE IF EXISTS analytics_posts;

sql/schema/007_add_analytics_coverage.sql

@@ -0,0 +1,12 @@
+-- +goose up
+CREATE TABLE IF NOT EXISTS analytics_coverage (
+    user_id TEXT NOT NULL,
+    platform TEXT NOT NULL,
+    covered_start TIMESTAMPTZ NOT NULL,
+    covered_end TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    PRIMARY KEY (user_id, platform)
+);
+
+-- +goose down
+DROP TABLE IF EXISTS analytics_coverage;

testClient/main.go

@@ -1,16 +1,22 @@
 package main
 
 import (
-	"bytes"
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"log"
-	"os"
-
+	"math/big"
 	"net/http"
 	"net/http/httputil"
+	"os"
+	"strings"
+	"time"
 
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/joho/godotenv"
 
 	x402 "github.com/x402-foundation/x402/go/v2"
@@ -19,6 +25,15 @@ import (
 	evmsigners "github.com/x402-foundation/x402/go/v2/signers/evm"
 )
 
+const (
+	USDCContractAddress = "0x036CbD53842c5426634e7929541eC2318f3dCF7e"
+	BaseSepoliaRPC      = "https://sepolia.base.org"
+	MinUSDCRequired     = 10.0
+	MinETHRequired      = 0.01
+)
+
+var usdcABI = `[{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"type":"function"}]`
+
 type LoggingRoundTripper struct {
 	Proxied http.RoundTripper
 }
@@ -31,7 +46,6 @@ func (lrt *LoggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, er
 		req.Body = rc
 	}
 
-	// Dump request
 	reqDump, err := httputil.DumpRequestOut(req, true)
 	if err != nil {
 		log.Printf("Error dumping request: %v", err)
@@ -39,13 +53,11 @@ func (lrt *LoggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, er
 		fmt.Printf("\n--- REQUEST ---\n%s\n----------------\n", reqDump)
 	}
 
-	// Perform request
 	resp, err := lrt.Proxied.RoundTrip(req)
 	if err != nil {
 		return nil, err
 	}
 
-	// Dump response
 	respDump, err := httputil.DumpResponse(resp, true)
 	if err != nil {
 		log.Printf("Error dumping response: %v", err)
@@ -56,13 +68,206 @@ func (lrt *LoggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, er
 	return resp, nil
 }
 
+func callEndpoint(client *http.Client, method, endpoint, body string) error {
+	baseURL := getEnv("TEST_SERVER_URL", "http://localhost:8080")
+	url := fmt.Sprintf("%s/v1/%s", baseURL, endpoint)
+	req, err := http.NewRequest(method, url, strings.NewReader(body))
+	if err != nil {
+		return fmt.Errorf("failed to create %s request: %w", endpoint, err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return fmt.Errorf("%s HTTP request failed: %w", endpoint, err)
+	}
+	defer resp.Body.Close()
+
+	respBody, _ := io.ReadAll(resp.Body)
+	fmt.Printf("%s Response Status: %s\n", endpoint, resp.Status)
+	if len(respBody) > 0 {
+		fmt.Printf("%s Response Body: %s\n", endpoint, string(respBody))
+	}
+
+	if resp.StatusCode == 402 {
+		return fmt.Errorf("%s: payment required (402)", endpoint)
+	}
+
+	return nil
+}
+
+func getEnv(key, fallback string) string {
+	if value, ok := os.LookupEnv(key); ok {
+		return value
+	}
+	return fallback
+}
+
+func getUSDCBalance(client *ethclient.Client, address common.Address) (*big.Int, error) {
+	contractAddr := common.HexToAddress(USDCContractAddress)
+	parsedABI, err := abi.JSON(strings.NewReader(usdcABI))
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse USDC ABI: %w", err)
+	}
+	data, err := parsedABI.Pack("balanceOf", address)
+	if err != nil {
+		return nil, fmt.Errorf("failed to pack balanceOf call: %w", err)
+	}
+	msg := ethereum.CallMsg{
+		To:   &contractAddr,
+		Data: data,
+	}
+	result, err := client.CallContract(context.Background(), msg, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to call balanceOf: %w", err)
+	}
+	unpacked, err := parsedABI.Unpack("balanceOf", result)
+	if err != nil {
+		return nil, fmt.Errorf("failed to unpack balance: %w", err)
+	}
+	if len(unpacked) == 0 {
+		return nil, fmt.Errorf("no balance returned")
+	}
+	balance, ok := unpacked[0].(*big.Int)
+	if !ok {
+		return nil, fmt.Errorf("unexpected balance type: %T", unpacked[0])
+	}
+	return balance, nil
+}
+
+func getETHBalance(client *ethclient.Client, address common.Address) (*big.Int, error) {
+	balance, err := client.BalanceAt(context.Background(), address, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get ETH balance: %w", err)
+	}
+	return balance, nil
+}
+
+func requestFaucetFunds(faucetURL, address, token string) error {
+	payload := map[string]string{
+		"address": address,
+		"token":   token,
+	}
+	jsonData, err := json.Marshal(payload)
+	if err != nil {
+		return fmt.Errorf("failed to marshal faucet request: %w", err)
+	}
+	resp, err := http.Post(faucetURL, "application/json", strings.NewReader(string(jsonData)))
+	if err != nil {
+		return fmt.Errorf("faucet request failed: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 400 {
+		body, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("faucet returned error %d: %s", resp.StatusCode, string(body))
+	}
+	return nil
+}
+
+func ensureFundedWallet(privateKey, faucetURL, rpcURL string) error {
+	client, err := ethclient.Dial(rpcURL)
+	if err != nil {
+		return fmt.Errorf("failed to connect to RPC: %w", err)
+	}
+	defer client.Close()
+
+	signer, err := evmsigners.NewClientSignerFromPrivateKey(privateKey)
+	if err != nil {
+		return fmt.Errorf("failed to create signer: %w", err)
+	}
+	addrStr := signer.Address()
+	address := common.HexToAddress(addrStr)
+
+	log.Printf("Checking wallet balance for %s...", addrStr)
+
+	usdcBalance, err := getUSDCBalance(client, address)
+	if err != nil {
+		return fmt.Errorf("failed to get USDC balance: %w", err)
+	}
+	usdcBalanceFloat := new(big.Float).Quo(new(big.Float).SetInt(usdcBalance), big.NewFloat(1e6))
+	usdcFloat, _ := usdcBalanceFloat.Float64()
+	log.Printf("Current USDC balance: %.6f USDC", usdcFloat)
+
+	ethBalance, err := getETHBalance(client, address)
+	if err != nil {
+		return fmt.Errorf("failed to get ETH balance: %w", err)
+	}
+	ethBalanceFloat := new(big.Float).Quo(new(big.Float).SetInt(ethBalance), big.NewFloat(1e18))
+	ethFloat, _ := ethBalanceFloat.Float64()
+	log.Printf("Current ETH balance: %.6f ETH", ethFloat)
+
+	needsFunding := false
+	if usdcFloat < MinUSDCRequired {
+		log.Printf("USDC balance %.6f below minimum %.2f, requesting funding...", usdcFloat, MinUSDCRequired)
+		needsFunding = true
+	}
+	if ethFloat < MinETHRequired {
+		log.Printf("ETH balance %.6f below minimum %.4f, requesting funding...", ethFloat, MinETHRequired)
+		needsFunding = true
+	}
+
+	if needsFunding {
+		if faucetURL == "" {
+			return fmt.Errorf("FUNDING_FAUCET_URL not set but wallet needs funding")
+		}
+		if usdcFloat < MinUSDCRequired {
+			log.Printf("Requesting USDC from faucet...")
+			if err := requestFaucetFunds(faucetURL, addrStr, "USDC"); err != nil {
+				return fmt.Errorf("failed to request USDC from faucet: %w", err)
+			}
+		}
+		if ethFloat < MinETHRequired {
+			log.Printf("Requesting ETH from faucet...")
+			if err := requestFaucetFunds(faucetURL, addrStr, "ETH"); err != nil {
+				return fmt.Errorf("failed to request ETH from faucet: %w", err)
+			}
+		}
+		log.Printf("Waiting for funding to arrive...")
+		time.Sleep(30 * time.Second)
+
+		usdcBalance, err = getUSDCBalance(client, address)
+		if err != nil {
+			return fmt.Errorf("failed to get USDC balance after funding: %w", err)
+		}
+		usdcBalanceFloat = new(big.Float).Quo(new(big.Float).SetInt(usdcBalance), big.NewFloat(1e6))
+		usdcFloat, _ = usdcBalanceFloat.Float64()
+		log.Printf("New USDC balance: %.6f USDC", usdcFloat)
+
+		ethBalance, err = getETHBalance(client, address)
+		if err != nil {
+			return fmt.Errorf("failed to get ETH balance after funding: %w", err)
+		}
+		ethBalanceFloat = new(big.Float).Quo(new(big.Float).SetInt(ethBalance), big.NewFloat(1e18))
+		ethFloat, _ = ethBalanceFloat.Float64()
+		log.Printf("New ETH balance: %.6f ETH", ethFloat)
+
+		if usdcFloat < MinUSDCRequired {
+			return fmt.Errorf("USDC balance still insufficient after funding: %.6f < %.2f", usdcFloat, MinUSDCRequired)
+		}
+		if ethFloat < MinETHRequired {
+			return fmt.Errorf("ETH balance still insufficient after funding: %.6f < %.4f", ethFloat, MinETHRequired)
+		}
+	} else {
+		log.Printf("Wallet has sufficient funds")
+	}
+	return nil
+}
+
 func main() {
 	godotenv.Load()
-	var (
-		privateKey = os.Getenv("PRIVATE_KEY")
-		serverURL  = "https://api.naco.li/v1"
-		ctx        = context.Background()
-	)
+	privateKey := os.Getenv("PRIVATE_KEY")
+	serverURL := getEnv("TEST_SERVER_URL", "http://localhost:8080")
+	faucetURL := getEnv("FUNDING_FAUCET_URL", "")
+	rpcURL := getEnv("RPC_URL", BaseSepoliaRPC)
+
+	if privateKey == "" {
+		log.Fatal("PRIVATE_KEY environment variable is required")
+	}
+
+	log.Printf("Ensuring wallet is funded...")
+	if err := ensureFundedWallet(privateKey, faucetURL, rpcURL); err != nil {
+		log.Fatal("Failed to ensure wallet is funded: ", err)
+	}
 
 	signer, err := evmsigners.NewClientSignerFromPrivateKey(privateKey)
 	if err != nil {
@@ -70,12 +275,13 @@ func main() {
 	}
 
 	x402Client := x402.Newx402Client().
-		Register("eip155:*", evm.NewExactEvmScheme(signer, nil))
+		Register("eip155:84532", evm.NewExactEvmScheme(signer, nil))
 
 	debugClient := &http.Client{
 		Transport: &LoggingRoundTripper{
 			Proxied: http.DefaultTransport,
 		},
+		Timeout: 60 * time.Second,
 	}
 
 	httpClient := x402http.WrapHTTPClientWithPayment(
@@ -83,39 +289,44 @@ func main() {
 		x402http.Newx402HTTPClient(x402Client),
 	)
 
-	log.Println("Starting REST API tests...")
+	log.Printf("Starting REST API endpoint tests against %s...", serverURL)
 
-	log.Println("\nCalling getFeed (free tool) via HTTP client...")
-	bodyGetFeed := []byte(`{"uri": "https://bsky.app/profile/did:plc:z72i7hdynmk6r22z27h6tvur/feed/whats-hot"}`)
-	resp, err := httpClient.Post(fmt.Sprintf("%s/getFeed", serverURL), "application/json", bytes.NewReader(bodyGetFeed))
-	if err != nil {
-		log.Println("getFeed HTTP request failed:", err)
-	} else {
-		defer resp.Body.Close()
-		body, _ := io.ReadAll(resp.Body)
-		log.Printf("getFeed Response Status: %s\n", resp.Status)
-		log.Printf("getFeed Response Body: %s\n", string(body))
+	testCases := []struct {
+		name      string
+		method    string
+		endpoint  string
+		body      string
+	}{
+		{"getFeed", "POST", "getFeed", `{"uri": "https://bsky.app/profile/did:plc:z72i7hdynmk6r22z27h6tvur/feed/whats-hot"}`},
+		{"getActor", "POST", "getActor", `{"author": "did:plc:z72i7hdynmk6r22z27h6tvur"}`},
+		{"searchActors", "POST", "searchActors", `{"query": "test", "limit": 5}`},
+		{"getPost", "POST", "getPost", `{"actor":"sharkgamiart.bsky.social","rkey":"3m47y27c67c2b"}`},
+		{"getLatestPosts", "POST", "getLatestPosts", `{"author":"sharkgamiart.bsky.social","limit": 5}`},
+		{"getPostsInTime", "POST", "getPostsInTime", `{"author":"sharkgamiart.bsky.social","startTime": "2024-01-01T00:00:00Z","endTime": "2024-12-31T23:59:59Z","limit": 5}`},
+		{"getStyleProfile", "POST", "getStyleProfile", `{"author":"did:plc:z72i7hdynmk6r22z27h6tvur"}`},
+		{"findSimilarUsers", "POST", "findSimilarUsers", `{"author":"did:plc:z72i7hdynmk6r22z27h6tvur","limit": 5}`},
 	}
 
-	log.Println("\nCalling getPost (gated paid tool) via HTTP client...")
-	bodyGetPost := []byte(`{"actor":"sharkgamiart.bsky.social","rkey":"3m47y27c67c2b"}`)
+	passed := 0
+	failed := 0
 
-	req, err := http.NewRequestWithContext(ctx, "POST", fmt.Sprintf("%s/getPost", serverURL), bytes.NewReader(bodyGetPost))
-	if err != nil {
-		log.Fatal("Failed to create getPost request:", err)
+	for _, tc := range testCases {
+		fmt.Printf("\n=== Testing %s ===\n", tc.name)
+		err := callEndpoint(httpClient, tc.method, tc.endpoint, tc.body)
+		if err != nil {
+			log.Printf("FAIL %s: %v\n", tc.name, err)
+			failed++
+		} else {
+			fmt.Printf("PASS %s\n", tc.name)
+			passed++
+		}
 	}
-	req.GetBody = func() (io.ReadCloser, error) {
-		return io.NopCloser(bytes.NewReader(bodyGetPost)), nil
-	}
-	req.Header.Set("Content-Type", "application/json")
 
-	respPost, err := httpClient.Do(req)
-	if err != nil {
-		log.Println("getPost HTTP request failed:", err)
-	} else {
-		defer respPost.Body.Close()
-		body, _ := io.ReadAll(respPost.Body)
-		log.Printf("getPost Response Status: %s\n", respPost.Status)
-		log.Printf("getPost Response Body: %s\n", string(body))
+	log.Printf("\n=== Test Summary ===")
+	log.Printf("Passed: %d", passed)
+	log.Printf("Failed: %d", failed)
+
+	if failed > 0 {
+		os.Exit(1)
 	}
 }