refactor(ai): split the 1180-line ai.go into focused files

Decomposes backend/api/rest/ai.go (which the review flagged at 1180 lines and which was the largest file in the repo by a wide margin) into six purpose-built files inside the same package, so no import paths change for any caller and *Server receivers keep working: ai.go 198 handlers + feature flags + exported AI* DTOs ai_context.go 381 buildAIContext + indexed-DB queries (stats / tx / address / block) + regex patterns + extractBlockReference ai_routes.go 139 queryAIRoutes + filterAIRouteMatches + routeMatchesQuery + normalizeHexString ai_docs.go 136 loadAIDocSnippets + findAIWorkspaceRoot + scanDocForTerms + buildDocSearchTerms ai_xai.go 267 xAI / OpenAI request/response types + normalizeAIMessages + latestUserMessage + callXAIChatCompletions + parseXAIError + extractOutputText ai_helpers.go 112 pure-function utilities (firstRegexMatch, compactStringMap, compactAnyMap, stringValue, stringSliceValue, uniqueStrings, clipString, fileExists) ai_runtime.go (rate limiter + metrics + audit log) is unchanged. This is a pure move: no logic changes, no new public API, no changes to HTTP routes. Each file carries only the imports it actually uses so goimports is clean on every file individually. Every exported symbol retained its original spelling so callers (routes.go, server.go, and the AI e2e tests) keep compiling without edits. Verification: go build ./... clean go vet ./... clean go test ./api/rest/... PASS staticcheck ./... clean on the SA* correctness family Advances completion criterion 6 (backend maintainability): 'no single Go file exceeds a few hundred lines; AI/LLM plumbing is separated from HTTP handlers; context-building is separated from upstream calls.'
2026-04-18 19:13:38 +00:00
parent e1c3b40cb0
commit 945e637d1d
6 changed files with 1046 additions and 993 deletions
--- a/backend/api/rest/ai.go
+++ b/backend/api/rest/ai.go
--- a/backend/api/rest/ai_context.go
+++ b/backend/api/rest/ai_context.go
@@ -0,0 +1,381 @@
+package rest
+
+import (
+	"context"
+	"fmt"
+	"regexp"
+	"strings"
+	"time"
+)
+
+var (
+	addressPattern     = regexp.MustCompile(`0x[a-fA-F0-9]{40}`)
+	transactionPattern = regexp.MustCompile(`0x[a-fA-F0-9]{64}`)
+	blockRefPattern    = regexp.MustCompile(`(?i)\bblock\s+#?(\d+)\b`)
+)
+
+func (s *Server) buildAIContext(ctx context.Context, query string, pageContext map[string]string) (AIContextEnvelope, []string) {
+	warnings := []string{}
+	envelope := AIContextEnvelope{
+		ChainID:          s.chainID,
+		Explorer:         "SolaceScan",
+		PageContext:      compactStringMap(pageContext),
+		CapabilityNotice: "This assistant is wired for read-only explorer analysis. It can summarize indexed chain data, liquidity routes, and curated workspace docs, but it does not sign transactions or execute private operations.",
+	}
+
+	sources := []AIContextSource{
+		{Type: "system", Label: "Explorer REST backend"},
+	}
+
+	if stats, err := s.queryAIStats(ctx); err == nil {
+		envelope.Stats = stats
+		sources = append(sources, AIContextSource{Type: "database", Label: "Explorer indexer database"})
+	} else if err != nil {
+		warnings = append(warnings, "indexed explorer stats unavailable: "+err.Error())
+	}
+
+	if strings.TrimSpace(query) != "" {
+		if txHash := firstRegexMatch(transactionPattern, query); txHash != "" && s.db != nil {
+			if tx, err := s.queryAITransaction(ctx, txHash); err == nil && len(tx) > 0 {
+				envelope.Transaction = tx
+			} else if err != nil {
+				warnings = append(warnings, "transaction context unavailable: "+err.Error())
+			}
+		}
+
+		if addr := firstRegexMatch(addressPattern, query); addr != "" && s.db != nil {
+			if addressInfo, err := s.queryAIAddress(ctx, addr); err == nil && len(addressInfo) > 0 {
+				envelope.Address = addressInfo
+			} else if err != nil {
+				warnings = append(warnings, "address context unavailable: "+err.Error())
+			}
+		}
+
+		if blockNumber := extractBlockReference(query); blockNumber > 0 && s.db != nil {
+			if block, err := s.queryAIBlock(ctx, blockNumber); err == nil && len(block) > 0 {
+				envelope.Block = block
+			} else if err != nil {
+				warnings = append(warnings, "block context unavailable: "+err.Error())
+			}
+		}
+	}
+
+	if routeMatches, routeWarning := s.queryAIRoutes(ctx, query); len(routeMatches) > 0 {
+		envelope.RouteMatches = routeMatches
+		sources = append(sources, AIContextSource{Type: "routes", Label: "Token aggregation live routes", Origin: firstNonEmptyEnv("TOKEN_AGGREGATION_API_BASE", "TOKEN_AGGREGATION_URL", "TOKEN_AGGREGATION_BASE_URL")})
+	} else if routeWarning != "" {
+		warnings = append(warnings, routeWarning)
+	}
+
+	if docs, root, docWarning := loadAIDocSnippets(query); len(docs) > 0 {
+		envelope.DocSnippets = docs
+		sources = append(sources, AIContextSource{Type: "docs", Label: "Workspace docs", Origin: root})
+	} else if docWarning != "" {
+		warnings = append(warnings, docWarning)
+	}
+
+	envelope.Sources = sources
+	return envelope, uniqueStrings(warnings)
+}
+
+func (s *Server) queryAIStats(ctx context.Context) (map[string]any, error) {
+	if s.db == nil {
+		return nil, fmt.Errorf("database unavailable")
+	}
+	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
+	defer cancel()
+
+	stats := map[string]any{}
+
+	var totalBlocks int64
+	if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM blocks WHERE chain_id = $1`, s.chainID).Scan(&totalBlocks); err == nil {
+		stats["total_blocks"] = totalBlocks
+	}
+
+	var totalTransactions int64
+	if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM transactions WHERE chain_id = $1`, s.chainID).Scan(&totalTransactions); err == nil {
+		stats["total_transactions"] = totalTransactions
+	}
+
+	var totalAddresses int64
+	if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM (
+		SELECT from_address AS address
+		FROM transactions
+		WHERE chain_id = $1 AND from_address IS NOT NULL AND from_address <> ''
+		UNION
+		SELECT to_address AS address
+		FROM transactions
+		WHERE chain_id = $1 AND to_address IS NOT NULL AND to_address <> ''
+	) unique_addresses`, s.chainID).Scan(&totalAddresses); err == nil {
+		stats["total_addresses"] = totalAddresses
+	}
+
+	var latestBlock int64
+	if err := s.db.QueryRow(ctx, `SELECT COALESCE(MAX(number), 0) FROM blocks WHERE chain_id = $1`, s.chainID).Scan(&latestBlock); err == nil {
+		stats["latest_block"] = latestBlock
+	}
+
+	if len(stats) == 0 {
+		var totalBlocks int64
+		if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM blocks`).Scan(&totalBlocks); err == nil {
+			stats["total_blocks"] = totalBlocks
+		}
+
+		var totalTransactions int64
+		if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM transactions`).Scan(&totalTransactions); err == nil {
+			stats["total_transactions"] = totalTransactions
+		}
+
+		var totalAddresses int64
+		if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM addresses`).Scan(&totalAddresses); err == nil {
+			stats["total_addresses"] = totalAddresses
+		}
+
+		var latestBlock int64
+		if err := s.db.QueryRow(ctx, `SELECT COALESCE(MAX(number), 0) FROM blocks`).Scan(&latestBlock); err == nil {
+			stats["latest_block"] = latestBlock
+		}
+	}
+
+	if len(stats) == 0 {
+		return nil, fmt.Errorf("no indexed stats available")
+	}
+	return stats, nil
+}
+
+func (s *Server) queryAITransaction(ctx context.Context, hash string) (map[string]any, error) {
+	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
+	defer cancel()
+
+	query := `
+		SELECT hash, block_number, from_address, to_address, value, gas_used, gas_price, status, timestamp_iso
+		FROM transactions
+		WHERE chain_id = $1 AND hash = $2
+		LIMIT 1
+	`
+
+	var txHash, fromAddress, value string
+	var blockNumber int64
+	var toAddress *string
+	var gasUsed, gasPrice *int64
+	var status *int64
+	var timestampISO *string
+
+	err := s.db.QueryRow(ctx, query, s.chainID, hash).Scan(
+		&txHash, &blockNumber, &fromAddress, &toAddress, &value, &gasUsed, &gasPrice, &status, &timestampISO,
+	)
+	if err != nil {
+		normalizedHash := normalizeHexString(hash)
+		blockscoutQuery := `
+			SELECT
+				concat('0x', encode(hash, 'hex')) AS hash,
+				block_number,
+				concat('0x', encode(from_address_hash, 'hex')) AS from_address,
+				CASE
+					WHEN to_address_hash IS NULL THEN NULL
+					ELSE concat('0x', encode(to_address_hash, 'hex'))
+				END AS to_address,
+				COALESCE(value::text, '0') AS value,
+				gas_used,
+				gas_price,
+				status,
+				TO_CHAR(block_timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DD"T"HH24:MI:SS"Z"') AS timestamp_iso
+			FROM transactions
+			WHERE hash = decode($1, 'hex')
+			LIMIT 1
+		`
+		if fallbackErr := s.db.QueryRow(ctx, blockscoutQuery, normalizedHash).Scan(
+			&txHash, &blockNumber, &fromAddress, &toAddress, &value, &gasUsed, &gasPrice, &status, &timestampISO,
+		); fallbackErr != nil {
+			return nil, err
+		}
+	}
+
+	tx := map[string]any{
+		"hash":         txHash,
+		"block_number": blockNumber,
+		"from_address": fromAddress,
+		"value":        value,
+	}
+	if toAddress != nil {
+		tx["to_address"] = *toAddress
+	}
+	if gasUsed != nil {
+		tx["gas_used"] = *gasUsed
+	}
+	if gasPrice != nil {
+		tx["gas_price"] = *gasPrice
+	}
+	if status != nil {
+		tx["status"] = *status
+	}
+	if timestampISO != nil {
+		tx["timestamp_iso"] = *timestampISO
+	}
+	return tx, nil
+}
+
+func (s *Server) queryAIAddress(ctx context.Context, address string) (map[string]any, error) {
+	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
+	defer cancel()
+
+	address = normalizeAddress(address)
+
+	result := map[string]any{
+		"address": address,
+	}
+
+	var txCount int64
+	if err := s.db.QueryRow(ctx, `SELECT COUNT(*) FROM transactions WHERE chain_id = $1 AND (LOWER(from_address) = $2 OR LOWER(to_address) = $2)`, s.chainID, address).Scan(&txCount); err == nil {
+		result["transaction_count"] = txCount
+	}
+
+	var tokenCount int64
+	if err := s.db.QueryRow(ctx, `SELECT COUNT(DISTINCT token_contract) FROM token_transfers WHERE chain_id = $1 AND (LOWER(from_address) = $2 OR LOWER(to_address) = $2)`, s.chainID, address).Scan(&tokenCount); err == nil {
+		result["token_count"] = tokenCount
+	}
+
+	var recentHashes []string
+	rows, err := s.db.Query(ctx, `
+		SELECT hash
+		FROM transactions
+		WHERE chain_id = $1 AND (LOWER(from_address) = $2 OR LOWER(to_address) = $2)
+		ORDER BY block_number DESC, transaction_index DESC
+		LIMIT 5
+	`, s.chainID, address)
+	if err == nil {
+		defer rows.Close()
+		for rows.Next() {
+			var hash string
+			if scanErr := rows.Scan(&hash); scanErr == nil {
+				recentHashes = append(recentHashes, hash)
+			}
+		}
+	}
+	if len(recentHashes) > 0 {
+		result["recent_transactions"] = recentHashes
+	}
+
+	if len(result) == 1 {
+		normalizedAddress := normalizeHexString(address)
+
+		var blockscoutTxCount int64
+		var blockscoutTokenCount int64
+		blockscoutAddressQuery := `
+			SELECT
+				COALESCE(transactions_count, 0),
+				COALESCE(token_transfers_count, 0)
+			FROM addresses
+			WHERE hash = decode($1, 'hex')
+			LIMIT 1
+		`
+		if err := s.db.QueryRow(ctx, blockscoutAddressQuery, normalizedAddress).Scan(&blockscoutTxCount, &blockscoutTokenCount); err == nil {
+			result["transaction_count"] = blockscoutTxCount
+			result["token_count"] = blockscoutTokenCount
+		}
+
+		var liveTxCount int64
+		if err := s.db.QueryRow(ctx, `
+			SELECT COUNT(*)
+			FROM transactions
+			WHERE from_address_hash = decode($1, 'hex') OR to_address_hash = decode($1, 'hex')
+		`, normalizedAddress).Scan(&liveTxCount); err == nil && liveTxCount > 0 {
+			result["transaction_count"] = liveTxCount
+		}
+
+		var liveTokenCount int64
+		if err := s.db.QueryRow(ctx, `
+			SELECT COUNT(DISTINCT token_contract_address_hash)
+			FROM token_transfers
+			WHERE from_address_hash = decode($1, 'hex') OR to_address_hash = decode($1, 'hex')
+		`, normalizedAddress).Scan(&liveTokenCount); err == nil && liveTokenCount > 0 {
+			result["token_count"] = liveTokenCount
+		}
+
+		rows, err := s.db.Query(ctx, `
+			SELECT concat('0x', encode(hash, 'hex'))
+			FROM transactions
+			WHERE from_address_hash = decode($1, 'hex') OR to_address_hash = decode($1, 'hex')
+			ORDER BY block_number DESC, index DESC
+			LIMIT 5
+		`, normalizedAddress)
+		if err == nil {
+			defer rows.Close()
+			for rows.Next() {
+				var hash string
+				if scanErr := rows.Scan(&hash); scanErr == nil {
+					recentHashes = append(recentHashes, hash)
+				}
+			}
+		}
+		if len(recentHashes) > 0 {
+			result["recent_transactions"] = recentHashes
+		}
+	}
+
+	if len(result) == 1 {
+		return nil, fmt.Errorf("address not found")
+	}
+	return result, nil
+}
+
+func (s *Server) queryAIBlock(ctx context.Context, blockNumber int64) (map[string]any, error) {
+	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
+	defer cancel()
+
+	query := `
+		SELECT number, hash, parent_hash, transaction_count, gas_used, gas_limit, timestamp_iso
+		FROM blocks
+		WHERE chain_id = $1 AND number = $2
+		LIMIT 1
+	`
+
+	var number int64
+	var hash, parentHash string
+	var transactionCount int64
+	var gasUsed, gasLimit int64
+	var timestampISO *string
+
+	err := s.db.QueryRow(ctx, query, s.chainID, blockNumber).Scan(&number, &hash, &parentHash, &transactionCount, &gasUsed, &gasLimit, &timestampISO)
+	if err != nil {
+		blockscoutQuery := `
+			SELECT
+				number,
+				concat('0x', encode(hash, 'hex')) AS hash,
+				concat('0x', encode(parent_hash, 'hex')) AS parent_hash,
+				(SELECT COUNT(*) FROM transactions WHERE block_number = b.number) AS transaction_count,
+				gas_used,
+				gas_limit,
+				TO_CHAR(timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DD"T"HH24:MI:SS"Z"') AS timestamp_iso
+			FROM blocks b
+			WHERE number = $1
+			LIMIT 1
+		`
+		if fallbackErr := s.db.QueryRow(ctx, blockscoutQuery, blockNumber).Scan(&number, &hash, &parentHash, &transactionCount, &gasUsed, &gasLimit, &timestampISO); fallbackErr != nil {
+			return nil, err
+		}
+	}
+
+	block := map[string]any{
+		"number":            number,
+		"hash":              hash,
+		"parent_hash":       parentHash,
+		"transaction_count": transactionCount,
+		"gas_used":          gasUsed,
+		"gas_limit":         gasLimit,
+	}
+	if timestampISO != nil {
+		block["timestamp_iso"] = *timestampISO
+	}
+	return block, nil
+}
+
+func extractBlockReference(query string) int64 {
+	match := blockRefPattern.FindStringSubmatch(query)
+	if len(match) != 2 {
+		return 0
+	}
+	var value int64
+	fmt.Sscan(match[1], &value)
+	return value
+}
--- a/backend/api/rest/ai_docs.go
+++ b/backend/api/rest/ai_docs.go
@@ -0,0 +1,136 @@
+package rest
+
+import (
+	"bufio"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func loadAIDocSnippets(query string) ([]AIDocSnippet, string, string) {
+	root := findAIWorkspaceRoot()
+	if root == "" {
+		return nil, "", "workspace docs root unavailable for ai doc retrieval"
+	}
+
+	relativePaths := []string{
+		"docs/11-references/ADDRESS_MATRIX_AND_STATUS.md",
+		"docs/11-references/LIQUIDITY_POOLS_MASTER_MAP.md",
+		"docs/11-references/DEPLOYED_TOKENS_BRIDGES_LPS_AND_ROUTING_STATUS.md",
+		"docs/11-references/EXPLORER_TOKEN_LIST_CROSSCHECK.md",
+		"explorer-monorepo/docs/EXPLORER_API_ACCESS.md",
+	}
+
+	terms := buildDocSearchTerms(query)
+	if len(terms) == 0 {
+		terms = []string{"chain 138", "bridge", "liquidity"}
+	}
+
+	snippets := []AIDocSnippet{}
+	for _, rel := range relativePaths {
+		fullPath := filepath.Join(root, rel)
+		fileSnippets := scanDocForTerms(fullPath, rel, terms)
+		snippets = append(snippets, fileSnippets...)
+		if len(snippets) >= maxExplorerAIDocSnippets {
+			break
+		}
+	}
+	if len(snippets) == 0 {
+		return nil, root, "no matching workspace docs found for ai context"
+	}
+	if len(snippets) > maxExplorerAIDocSnippets {
+		snippets = snippets[:maxExplorerAIDocSnippets]
+	}
+	return snippets, root, ""
+}
+
+func findAIWorkspaceRoot() string {
+	candidates := []string{}
+	if envRoot := strings.TrimSpace(os.Getenv("EXPLORER_AI_WORKSPACE_ROOT")); envRoot != "" {
+		candidates = append(candidates, envRoot)
+	}
+	if cwd, err := os.Getwd(); err == nil {
+		candidates = append(candidates, cwd)
+		dir := cwd
+		for i := 0; i < 4; i++ {
+			dir = filepath.Dir(dir)
+			candidates = append(candidates, dir)
+		}
+	}
+	candidates = append(candidates, "/opt/explorer-monorepo", "/home/intlc/projects/proxmox")
+
+	for _, candidate := range candidates {
+		if candidate == "" {
+			continue
+		}
+		if fileExists(filepath.Join(candidate, "docs")) && (fileExists(filepath.Join(candidate, "explorer-monorepo")) || fileExists(filepath.Join(candidate, "smom-dbis-138")) || fileExists(filepath.Join(candidate, "config"))) {
+			return candidate
+		}
+	}
+	return ""
+}
+
+func scanDocForTerms(fullPath, relativePath string, terms []string) []AIDocSnippet {
+	file, err := os.Open(fullPath)
+	if err != nil {
+		return nil
+	}
+	defer file.Close()
+
+	normalizedTerms := make([]string, 0, len(terms))
+	for _, term := range terms {
+		term = strings.ToLower(strings.TrimSpace(term))
+		if len(term) >= 3 {
+			normalizedTerms = append(normalizedTerms, term)
+		}
+	}
+
+	scanner := bufio.NewScanner(file)
+	lineNumber := 0
+	snippets := []AIDocSnippet{}
+	for scanner.Scan() {
+		lineNumber++
+		line := scanner.Text()
+		lower := strings.ToLower(line)
+		for _, term := range normalizedTerms {
+			if strings.Contains(lower, term) {
+				snippets = append(snippets, AIDocSnippet{
+					Path:    relativePath,
+					Line:    lineNumber,
+					Snippet: clipString(strings.TrimSpace(line), 280),
+				})
+				break
+			}
+		}
+		if len(snippets) >= 2 {
+			break
+		}
+	}
+	return snippets
+}
+
+func buildDocSearchTerms(query string) []string {
+	words := strings.Fields(strings.ToLower(query))
+	stopWords := map[string]bool{
+		"what": true, "when": true, "where": true, "which": true, "with": true, "from": true,
+		"that": true, "this": true, "have": true, "about": true, "into": true, "show": true,
+		"live": true, "help": true, "explain": true, "tell": true,
+	}
+	terms := []string{}
+	for _, word := range words {
+		word = strings.Trim(word, ".,:;!?()[]{}\"'")
+		if len(word) < 4 || stopWords[word] {
+			continue
+		}
+		terms = append(terms, word)
+	}
+	for _, match := range addressPattern.FindAllString(query, -1) {
+		terms = append(terms, strings.ToLower(match))
+	}
+	for _, symbol := range []string{"cUSDT", "cUSDC", "cXAUC", "cEURT", "USDT", "USDC", "WETH", "WETH10", "Mainnet", "bridge", "liquidity", "pool"} {
+		if strings.Contains(strings.ToLower(query), strings.ToLower(symbol)) {
+			terms = append(terms, strings.ToLower(symbol))
+		}
+	}
+	return uniqueStrings(terms)
+}
--- a/backend/api/rest/ai_helpers.go
+++ b/backend/api/rest/ai_helpers.go
@@ -0,0 +1,112 @@
+package rest
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"sort"
+	"strings"
+)
+
+func firstRegexMatch(pattern *regexp.Regexp, value string) string {
+	match := pattern.FindString(value)
+	return strings.TrimSpace(match)
+}
+
+func compactStringMap(values map[string]string) map[string]string {
+	if len(values) == 0 {
+		return nil
+	}
+	out := map[string]string{}
+	for key, value := range values {
+		if trimmed := strings.TrimSpace(value); trimmed != "" {
+			out[key] = trimmed
+		}
+	}
+	if len(out) == 0 {
+		return nil
+	}
+	return out
+}
+
+func compactAnyMap(values map[string]any) map[string]any {
+	out := map[string]any{}
+	for key, value := range values {
+		if value == nil {
+			continue
+		}
+		switch typed := value.(type) {
+		case string:
+			if strings.TrimSpace(typed) == "" {
+				continue
+			}
+		case []string:
+			if len(typed) == 0 {
+				continue
+			}
+		case []any:
+			if len(typed) == 0 {
+				continue
+			}
+		}
+		out[key] = value
+	}
+	return out
+}
+
+func stringValue(value any) string {
+	switch typed := value.(type) {
+	case string:
+		return typed
+	case fmt.Stringer:
+		return typed.String()
+	default:
+		return fmt.Sprintf("%v", value)
+	}
+}
+
+func stringSliceValue(value any) []string {
+	switch typed := value.(type) {
+	case []string:
+		return typed
+	case []any:
+		out := make([]string, 0, len(typed))
+		for _, item := range typed {
+			out = append(out, stringValue(item))
+		}
+		return out
+	default:
+		return nil
+	}
+}
+
+func uniqueStrings(values []string) []string {
+	seen := map[string]bool{}
+	out := []string{}
+	for _, value := range values {
+		trimmed := strings.TrimSpace(value)
+		if trimmed == "" || seen[trimmed] {
+			continue
+		}
+		seen[trimmed] = true
+		out = append(out, trimmed)
+	}
+	sort.Strings(out)
+	return out
+}
+
+func clipString(value string, limit int) string {
+	value = strings.TrimSpace(value)
+	if limit <= 0 || len(value) <= limit {
+		return value
+	}
+	return strings.TrimSpace(value[:limit]) + "..."
+}
+
+func fileExists(path string) bool {
+	if path == "" {
+		return false
+	}
+	info, err := os.Stat(path)
+	return err == nil && info != nil
+}
--- a/backend/api/rest/ai_routes.go
+++ b/backend/api/rest/ai_routes.go
@@ -0,0 +1,139 @@
+package rest
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+func (s *Server) queryAIRoutes(ctx context.Context, query string) ([]map[string]any, string) {
+	baseURL := strings.TrimSpace(firstNonEmptyEnv(
+		"TOKEN_AGGREGATION_API_BASE",
+		"TOKEN_AGGREGATION_URL",
+		"TOKEN_AGGREGATION_BASE_URL",
+	))
+	if baseURL == "" {
+		return nil, "token aggregation api base url is not configured for ai route retrieval"
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, strings.TrimRight(baseURL, "/")+"/api/v1/routes/ingestion?fromChainId=138", nil)
+	if err != nil {
+		return nil, "unable to build token aggregation ai request"
+	}
+
+	client := &http.Client{Timeout: 6 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, "token aggregation live routes unavailable: " + err.Error()
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		return nil, fmt.Sprintf("token aggregation live routes returned %d", resp.StatusCode)
+	}
+
+	var payload struct {
+		Routes []map[string]any `json:"routes"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&payload); err != nil {
+		return nil, "unable to decode token aggregation live routes"
+	}
+	if len(payload.Routes) == 0 {
+		return nil, "token aggregation returned no live routes"
+	}
+
+	matches := filterAIRouteMatches(payload.Routes, query)
+	return matches, ""
+}
+
+func filterAIRouteMatches(routes []map[string]any, query string) []map[string]any {
+	query = strings.ToLower(strings.TrimSpace(query))
+	matches := make([]map[string]any, 0, 6)
+	for _, route := range routes {
+		if query != "" && !routeMatchesQuery(route, query) {
+			continue
+		}
+		trimmed := map[string]any{
+			"routeId":            route["routeId"],
+			"status":             route["status"],
+			"routeType":          route["routeType"],
+			"fromChainId":        route["fromChainId"],
+			"toChainId":          route["toChainId"],
+			"tokenInSymbol":      route["tokenInSymbol"],
+			"tokenOutSymbol":     route["tokenOutSymbol"],
+			"assetSymbol":        route["assetSymbol"],
+			"label":              route["label"],
+			"aggregatorFamilies": route["aggregatorFamilies"],
+			"hopCount":           route["hopCount"],
+			"bridgeType":         route["bridgeType"],
+			"tags":               route["tags"],
+		}
+		matches = append(matches, compactAnyMap(trimmed))
+		if len(matches) >= 6 {
+			break
+		}
+	}
+	if len(matches) == 0 {
+		for _, route := range routes {
+			trimmed := map[string]any{
+				"routeId":            route["routeId"],
+				"status":             route["status"],
+				"routeType":          route["routeType"],
+				"fromChainId":        route["fromChainId"],
+				"toChainId":          route["toChainId"],
+				"tokenInSymbol":      route["tokenInSymbol"],
+				"tokenOutSymbol":     route["tokenOutSymbol"],
+				"assetSymbol":        route["assetSymbol"],
+				"label":              route["label"],
+				"aggregatorFamilies": route["aggregatorFamilies"],
+			}
+			matches = append(matches, compactAnyMap(trimmed))
+			if len(matches) >= 4 {
+				break
+			}
+		}
+	}
+	return matches
+}
+
+func normalizeHexString(value string) string {
+	trimmed := strings.TrimSpace(strings.ToLower(value))
+	return strings.TrimPrefix(trimmed, "0x")
+}
+
+func routeMatchesQuery(route map[string]any, query string) bool {
+	fields := []string{
+		stringValue(route["routeId"]),
+		stringValue(route["routeType"]),
+		stringValue(route["tokenInSymbol"]),
+		stringValue(route["tokenOutSymbol"]),
+		stringValue(route["assetSymbol"]),
+		stringValue(route["label"]),
+	}
+	for _, field := range fields {
+		if strings.Contains(strings.ToLower(field), query) {
+			return true
+		}
+	}
+	for _, value := range stringSliceValue(route["aggregatorFamilies"]) {
+		if strings.Contains(strings.ToLower(value), query) {
+			return true
+		}
+	}
+	for _, value := range stringSliceValue(route["tags"]) {
+		if strings.Contains(strings.ToLower(value), query) {
+			return true
+		}
+	}
+	for _, symbol := range []string{"cusdt", "cusdc", "cxauc", "ceurt", "usdt", "usdc", "weth"} {
+		if strings.Contains(query, symbol) {
+			if strings.Contains(strings.ToLower(strings.Join(fields, " ")), symbol) {
+				return true
+			}
+		}
+	}
+	return false
+}
--- a/backend/api/rest/ai_xai.go
+++ b/backend/api/rest/ai_xai.go
@@ -0,0 +1,267 @@
+package rest
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+type xAIChatCompletionsRequest struct {
+	Model    string              `json:"model"`
+	Messages []xAIChatMessageReq `json:"messages"`
+	Stream   bool                `json:"stream"`
+}
+
+type xAIChatMessageReq struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+type xAIChatCompletionsResponse struct {
+	Model      string             `json:"model"`
+	Choices    []xAIChoice        `json:"choices"`
+	OutputText string             `json:"output_text,omitempty"`
+	Output     []openAIOutputItem `json:"output,omitempty"`
+}
+
+type xAIChoice struct {
+	Message xAIChoiceMessage `json:"message"`
+}
+
+type xAIChoiceMessage struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+type openAIOutputItem struct {
+	Type    string                `json:"type"`
+	Content []openAIOutputContent `json:"content"`
+}
+
+type openAIOutputContent struct {
+	Type string `json:"type"`
+	Text string `json:"text"`
+}
+
+func normalizeAIMessages(messages []AIChatMessage) []AIChatMessage {
+	normalized := make([]AIChatMessage, 0, len(messages))
+	for _, message := range messages {
+		role := strings.ToLower(strings.TrimSpace(message.Role))
+		if role != "assistant" && role != "user" && role != "system" {
+			continue
+		}
+		content := clipString(strings.TrimSpace(message.Content), maxExplorerAIMessageChars)
+		if content == "" {
+			continue
+		}
+		normalized = append(normalized, AIChatMessage{
+			Role:    role,
+			Content: content,
+		})
+	}
+	if len(normalized) > maxExplorerAIMessages {
+		normalized = normalized[len(normalized)-maxExplorerAIMessages:]
+	}
+	return normalized
+}
+
+func latestUserMessage(messages []AIChatMessage) string {
+	for i := len(messages) - 1; i >= 0; i-- {
+		if messages[i].Role == "user" {
+			return messages[i].Content
+		}
+	}
+	if len(messages) == 0 {
+		return ""
+	}
+	return messages[len(messages)-1].Content
+}
+
+func (s *Server) callXAIChatCompletions(ctx context.Context, messages []AIChatMessage, contextEnvelope AIContextEnvelope) (string, string, error) {
+	apiKey := strings.TrimSpace(os.Getenv("XAI_API_KEY"))
+	if apiKey == "" {
+		return "", "", fmt.Errorf("XAI_API_KEY is not configured")
+	}
+
+	model := explorerAIModel()
+	baseURL := strings.TrimRight(strings.TrimSpace(os.Getenv("XAI_BASE_URL")), "/")
+	if baseURL == "" {
+		baseURL = "https://api.x.ai/v1"
+	}
+
+	contextJSON, _ := json.MarshalIndent(contextEnvelope, "", "  ")
+	contextText := clipString(string(contextJSON), maxExplorerAIContextChars)
+
+	baseSystem := "You are the SolaceScan ecosystem assistant for Chain 138. Answer using the supplied indexed explorer data, route inventory, and workspace documentation. Be concise, operationally useful, and explicit about uncertainty. Never claim a route, deployment, or production status is live unless the provided context says it is live. If data is missing, say exactly what is missing."
+	if !explorerAIOperatorToolsEnabled() {
+		baseSystem += " Never instruct users to paste private keys or seed phrases. Do not direct users to run privileged mint, liquidity, or bridge execution from the public explorer UI. Operator changes belong on LAN-gated workflows and authenticated Track 4 APIs; PMM/MCP-style execution tools are disabled on this deployment unless EXPLORER_AI_OPERATOR_TOOLS_ENABLED=1."
+	}
+
+	input := []xAIChatMessageReq{
+		{
+			Role:    "system",
+			Content: baseSystem,
+		},
+		{
+			Role:    "system",
+			Content: "Retrieved ecosystem context:\n" + contextText,
+		},
+	}
+
+	for _, message := range messages {
+		input = append(input, xAIChatMessageReq{
+			Role:    message.Role,
+			Content: message.Content,
+		})
+	}
+
+	payload := xAIChatCompletionsRequest{
+		Model:    model,
+		Messages: input,
+		Stream:   false,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return "", model, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, baseURL+"/chat/completions", bytes.NewReader(body))
+	if err != nil {
+		return "", model, err
+	}
+	req.Header.Set("Authorization", "Bearer "+apiKey)
+	req.Header.Set("Content-Type", "application/json")
+
+	client := &http.Client{Timeout: 45 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		if errors.Is(err, context.DeadlineExceeded) {
+			return "", model, &AIUpstreamError{
+				StatusCode: http.StatusGatewayTimeout,
+				Code:       "upstream_timeout",
+				Message:    "explorer ai upstream timed out",
+				Details:    "xAI request exceeded the configured timeout",
+			}
+		}
+		return "", model, &AIUpstreamError{
+			StatusCode: http.StatusBadGateway,
+			Code:       "upstream_transport_error",
+			Message:    "explorer ai upstream transport failed",
+			Details:    err.Error(),
+		}
+	}
+	defer resp.Body.Close()
+
+	responseBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", model, &AIUpstreamError{
+			StatusCode: http.StatusBadGateway,
+			Code:       "upstream_bad_response",
+			Message:    "explorer ai upstream body could not be read",
+			Details:    err.Error(),
+		}
+	}
+	if resp.StatusCode >= 400 {
+		return "", model, parseXAIError(resp.StatusCode, responseBody)
+	}
+
+	var response xAIChatCompletionsResponse
+	if err := json.Unmarshal(responseBody, &response); err != nil {
+		return "", model, &AIUpstreamError{
+			StatusCode: http.StatusBadGateway,
+			Code:       "upstream_bad_response",
+			Message:    "explorer ai upstream returned invalid JSON",
+			Details:    err.Error(),
+		}
+	}
+
+	reply := ""
+	if len(response.Choices) > 0 {
+		reply = strings.TrimSpace(response.Choices[0].Message.Content)
+	}
+	if reply == "" {
+		reply = strings.TrimSpace(response.OutputText)
+	}
+	if reply == "" {
+		reply = strings.TrimSpace(extractOutputText(response.Output))
+	}
+	if reply == "" {
+		return "", model, &AIUpstreamError{
+			StatusCode: http.StatusBadGateway,
+			Code:       "upstream_bad_response",
+			Message:    "explorer ai upstream returned no output text",
+			Details:    "xAI response did not include choices[0].message.content or output text",
+		}
+	}
+	if strings.TrimSpace(response.Model) != "" {
+		model = response.Model
+	}
+	return reply, model, nil
+}
+
+func parseXAIError(statusCode int, responseBody []byte) error {
+	var parsed struct {
+		Error struct {
+			Message string `json:"message"`
+			Type    string `json:"type"`
+			Code    string `json:"code"`
+		} `json:"error"`
+	}
+	_ = json.Unmarshal(responseBody, &parsed)
+
+	details := clipString(strings.TrimSpace(parsed.Error.Message), 280)
+	if details == "" {
+		details = clipString(strings.TrimSpace(string(responseBody)), 280)
+	}
+
+	switch statusCode {
+	case http.StatusUnauthorized, http.StatusForbidden:
+		return &AIUpstreamError{
+			StatusCode: statusCode,
+			Code:       "upstream_auth_failed",
+			Message:    "explorer ai upstream authentication failed",
+			Details:    details,
+		}
+	case http.StatusTooManyRequests:
+		return &AIUpstreamError{
+			StatusCode: statusCode,
+			Code:       "upstream_quota_exhausted",
+			Message:    "explorer ai upstream quota exhausted",
+			Details:    details,
+		}
+	case http.StatusRequestTimeout, http.StatusGatewayTimeout:
+		return &AIUpstreamError{
+			StatusCode: statusCode,
+			Code:       "upstream_timeout",
+			Message:    "explorer ai upstream timed out",
+			Details:    details,
+		}
+	default:
+		return &AIUpstreamError{
+			StatusCode: statusCode,
+			Code:       "upstream_error",
+			Message:    "explorer ai upstream request failed",
+			Details:    details,
+		}
+	}
+}
+
+func extractOutputText(items []openAIOutputItem) string {
+	parts := []string{}
+	for _, item := range items {
+		for _, content := range item.Content {
+			if strings.TrimSpace(content.Text) != "" {
+				parts = append(parts, strings.TrimSpace(content.Text))
+			}
+		}
+	}
+	return strings.Join(parts, "\n\n")
+}