Fix WOTD translation requirements, LLM sentiment accuracy, arena death timer, and fancy word detection

WOTD: Require both English and French translations, validate before
display, fall back to English word if pt-PT search exhausts 100 attempts.

LLM passive: Inject actual WOTD into classification prompt instead of
letting LLM guess at "unusual words". Add DreamDict-based fancy word
detection using frequency data — react with 🎓 for rare vocabulary.

Arena: Reduce death lockout from next-midnight-UTC to 2 hours.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/dreamclient/client.go

@@ -166,6 +166,29 @@ func (c *Client) Translate(word, from, to string) ([]string, error) {
 	return result.Translations, nil
 }
 
+// Frequency returns the frequency score for a word in a language.
+// Higher values indicate more common words. Returns 0 if unknown.
+func (c *Client) Frequency(word, lang string) (int, error) {
+	u := c.baseURL + "/frequency?" + url.Values{"word": {word}, "lang": {lang}}.Encode()
+	resp, err := c.httpClient.Get(u)
+	if err != nil {
+		return 0, fmt.Errorf("dreamdict: frequency: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return 0, fmt.Errorf("dreamdict: frequency: status %d", resp.StatusCode)
+	}
+
+	var result struct {
+		Frequency int `json:"frequency"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return 0, fmt.Errorf("dreamdict: frequency: decode: %w", err)
+	}
+	return result.Frequency, nil
+}
+
 // Health checks if the DreamDict service is reachable and returns stats.
 func (c *Client) Health() (*HealthResponse, error) {
 	resp, err := c.httpClient.Get(c.baseURL + "/health")

internal/plugin/adventure_arena.go

@@ -534,10 +534,10 @@ func (p *AdventurePlugin) resolveArenaDeath(ctx MessageContext, run *ArenaRun, c
 
 	lostEarnings := run.Earnings
 
-	// Kill the character (locked out until next midnight UTC)
+	// Kill the character (locked out for 2 hours)
 	char.Alive = false
 	now := time.Now().UTC()
-	deadUntil := time.Date(now.Year(), now.Month(), now.Day()+1, 0, 0, 0, 0, time.UTC)
+	deadUntil := now.Add(2 * time.Hour)
 	char.DeadUntil = &deadUntil
 	char.ArenaLosses++
 	char.CombatXP += arenaParticipationXP // +60 flat participation XP

internal/plugin/llm_passive.go

@@ -17,6 +17,7 @@ import (
 	"unicode"
 
 	"gogobee/internal/db"
+	"gogobee/internal/dreamclient"
 
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/id"
@@ -57,6 +58,7 @@ type queueItem struct {
 type LLMPassivePlugin struct {
 	Base
 	xp         *XPPlugin
+	dict       *dreamclient.Client
 	ollamaHost  string
 	ollamaModel string
 	sampleRate  float64
@@ -71,7 +73,7 @@ type LLMPassivePlugin struct {
 }
 
 // NewLLMPassivePlugin creates a new LLM passive classification plugin.
-func NewLLMPassivePlugin(client *mautrix.Client, xp *XPPlugin) *LLMPassivePlugin {
+func NewLLMPassivePlugin(client *mautrix.Client, xp *XPPlugin, dict *dreamclient.Client) *LLMPassivePlugin {
 	host := os.Getenv("OLLAMA_HOST")
 	model := os.Getenv("OLLAMA_MODEL")
 	enabled := host != "" && model != ""
@@ -86,6 +88,7 @@ func NewLLMPassivePlugin(client *mautrix.Client, xp *XPPlugin) *LLMPassivePlugin
 	p := &LLMPassivePlugin{
 		Base:        NewBase(client),
 		xp:          xp,
+		dict:        dict,
 		ollamaHost:  host,
 		ollamaModel: model,
 		sampleRate:  sampleRate,
@@ -309,7 +312,12 @@ func (p *LLMPassivePlugin) classifyAndProcess(item queueItem) error {
 		mentionHint = "\nMentioned users: " + strings.Join(parts, ", ")
 	}
 
-	result, err := p.callOllama(item.Body + mentionHint)
+	// Fetch today's WOTD so the LLM can check for correct usage
+	today := time.Now().UTC().Format("2006-01-02")
+	var todayWOTD string
+	db.Get().QueryRow(`SELECT word FROM wotd_log WHERE date = ?`, today).Scan(&todayWOTD)
+
+	result, err := p.callOllama(item.Body+mentionHint, todayWOTD)
 	if err != nil {
 		return fmt.Errorf("ollama call: %w", err)
 	}
@@ -454,7 +462,13 @@ func (p *LLMPassivePlugin) classifyAndProcess(item queueItem) error {
 		}
 	}
 	if result.WOTDUsed {
-		_ = p.SendReact(item.RoomID, item.EventID, "\U0001f4d6") // open book
+		_ = p.SendReact(item.RoomID, item.EventID, "\U0001f4d6") // 📖 open book
+	}
+	// Check for rare/sophisticated words via DreamDict frequency data
+	if p.dict != nil {
+		if p.hasFancyWord(item.Body) {
+			_ = p.SendReact(item.RoomID, item.EventID, "\U0001f393") // 🎓 graduation cap
+		}
 	}
 	if result.GratitudeTarget != "" {
 		_ = p.SendReact(item.RoomID, item.EventID, "\U0001f49c") // purple heart
@@ -485,7 +499,12 @@ type ollamaResponse struct {
 }
 
 // callOllama sends a classification prompt to Ollama and parses the JSON result.
-func (p *LLMPassivePlugin) callOllama(messageText string) (*classificationResult, error) {
+func (p *LLMPassivePlugin) callOllama(messageText, wotd string) (*classificationResult, error) {
+	wotdInstruction := `"wotd_used": false`
+	if wotd != "" {
+		wotdInstruction = fmt.Sprintf(`"wotd_used": true | false (whether the message uses the word "%s" correctly and meaningfully — not just mentioning or quoting it)`, wotd)
+	}
+
 	prompt := fmt.Sprintf(`Classify the following chat message. Respond ONLY with valid JSON (no markdown, no explanation).
 
 JSON schema:
@@ -496,11 +515,11 @@ JSON schema:
   "profanity": true | false,
   "profanity_severity": 0 | 1 | 2 | 3 (0=none, 1=mild e.g. damn/hell/crap, 2=moderate e.g. shit/ass/bitch, 3=scorching e.g. fuck/cunt and slurs),
   "insult_target": "" or "@user:server" if someone is being insulted,
-  "wotd_used": true | false (if the message uses an unusual/sophisticated word),
+  %s,
   "gratitude_target": "" or "@user:server" if thanking someone
 }
 
-Message: %s`, messageText)
+Message: %s`, wotdInstruction, messageText)
 
 	reqBody := ollamaRequest{
 		Model:  p.ollamaModel,
@@ -540,6 +559,41 @@ Message: %s`, messageText)
 }
 
 // parseClassification parses a JSON classification response with repair logic.
+// fancyWordMaxFreq is the threshold below which a word is considered rare/sophisticated.
+// SCOWL tiers: 10=1000, 20=800, 35=600, 50=400, 60=200, 70=50.
+// A frequency of 100 or below corresponds to SCOWL tier 65-70 (rare words).
+const fancyWordMaxFreq = 100
+
+// fancyWordMinLength filters out short words that may just be uncommon abbreviations.
+const fancyWordMinLength = 6
+
+// hasFancyWord checks if any word in the message is a rare/sophisticated English word
+// by looking up its frequency score in DreamDict.
+func (p *LLMPassivePlugin) hasFancyWord(message string) bool {
+	words := strings.Fields(strings.ToLower(message))
+	for _, w := range words {
+		// Strip punctuation from edges
+		w = strings.Trim(w, ".,!?;:\"'()[]{}…—–-")
+		if len(w) < fancyWordMinLength {
+			continue
+		}
+		// Skip URLs and mentions
+		if strings.Contains(w, "://") || strings.HasPrefix(w, "@") {
+			continue
+		}
+		freq, err := p.dict.Frequency(w, "en")
+		if err != nil {
+			continue
+		}
+		// freq == 0 means unknown word (not in dictionary), skip it.
+		// Low but nonzero frequency means rare but real word.
+		if freq > 0 && freq <= fancyWordMaxFreq {
+			return true
+		}
+	}
+	return false
+}
+
 func parseClassification(raw string) (*classificationResult, error) {
 	cleaned := raw
 

internal/plugin/wotd.go

@@ -94,13 +94,14 @@ func (p *WOTDPlugin) prefetchWord(force bool) error {
 		}
 	}
 
-	// Pick a random pt-PT word with definitions; prefer one with English translations.
+	// Pick a random pt-PT word with definitions and both English + French translations.
+	// Fall back to an English word if no valid pt-PT candidate is found.
 	var word, definition, partOfSpeech, translationsJSON string
 
-	for attempt := 0; attempt < 10; attempt++ {
+	for attempt := 0; attempt < 100; attempt++ {
 		candidate, err := p.dict.RandomWord("pt-PT", "", 4, 14)
 		if err != nil {
-			slog.Warn("wotd: random word attempt failed", "attempt", attempt+1, "err", err)
+			slog.Warn("wotd: random word attempt failed", "err", err)
 			continue
 		}
 
@@ -109,13 +110,16 @@ func (p *WOTDPlugin) prefetchWord(force bool) error {
 			continue
 		}
 
-		// Check for English translation (preferred but not required after 5 attempts)
+		// Require at least one English and one French translation
 		enTrans, _ := p.dict.Translate(candidate, "pt-PT", "en")
-		if len(enTrans) == 0 && attempt < 5 {
+		if len(enTrans) == 0 {
 			continue
 		}
 
 		frTrans, _ := p.dict.Translate(candidate, "pt-PT", "fr")
+		if len(frTrans) == 0 {
+			continue
+		}
 
 		word = candidate
 		definition = defs[0].Gloss
@@ -123,20 +127,35 @@ func (p *WOTDPlugin) prefetchWord(force bool) error {
 
 		// Store translations as JSON in the example column
 		transMap := map[string][]string{}
-		if len(enTrans) > 0 {
-			transMap["en"] = enTrans
-		}
-		if len(frTrans) > 0 {
-			transMap["fr"] = frTrans
-		}
+		transMap["en"] = enTrans
+		transMap["fr"] = frTrans
 		if data, err := json.Marshal(transMap); err == nil {
 			translationsJSON = string(data)
 		}
 		break
 	}
 
+	// Fallback: pick an English word if pt-PT search somehow fails
 	if word == "" {
-		return fmt.Errorf("wotd: failed to find a pt-PT word with definitions after 10 attempts")
+		slog.Warn("wotd: pt-PT search failed, falling back to English word")
+		for {
+			candidate, err := p.dict.RandomWord("en", "", 4, 14)
+			if err != nil {
+				continue
+			}
+			defs, err := p.dict.Define(candidate, "en")
+			if err != nil || len(defs) == 0 {
+				continue
+			}
+			word = candidate
+			definition = defs[0].Gloss
+			partOfSpeech = defs[0].POS
+			transMap := map[string][]string{"en": {candidate}}
+			if data, err := json.Marshal(transMap); err == nil {
+				translationsJSON = string(data)
+			}
+			break
+		}
 	}
 
 	if force {
@@ -163,6 +182,18 @@ func (p *WOTDPlugin) prefetchWord(force bool) error {
 	return nil
 }
 
+// hasEnglishTranslation checks whether the stored translations JSON includes English.
+func hasEnglishTranslation(translationsJSON string) bool {
+	if translationsJSON == "" {
+		return false
+	}
+	var transMap map[string][]string
+	if json.Unmarshal([]byte(translationsJSON), &transMap) != nil {
+		return false
+	}
+	return len(transMap["en"]) > 0
+}
+
 // PostWOTD posts today's Word of the Day to the given room and marks it as posted.
 func (p *WOTDPlugin) PostWOTD(roomID id.RoomID) error {
 	today := time.Now().UTC().Format("2006-01-02")
@@ -194,6 +225,20 @@ func (p *WOTDPlugin) PostWOTD(roomID id.RoomID) error {
 		return fmt.Errorf("wotd: query: %w", err)
 	}
 
+	// Re-prefetch if stored word is missing English translation
+	if !hasEnglishTranslation(example) {
+		slog.Warn("wotd: stored word missing English translation, forcing re-prefetch", "word", word)
+		if err := p.prefetchWord(true); err != nil {
+			return fmt.Errorf("wotd: re-prefetch failed: %w", err)
+		}
+		err = d.QueryRow(
+			`SELECT word, definition, part_of_speech, example FROM wotd_log WHERE date = ?`, today,
+		).Scan(&word, &definition, &partOfSpeech, &example)
+		if err != nil {
+			return fmt.Errorf("wotd: still no valid entry after re-prefetch: %w", err)
+		}
+	}
+
 	msg := p.formatWOTD(word, definition, partOfSpeech, example)
 	if err := p.SendMessage(roomID, msg); err != nil {
 		return fmt.Errorf("wotd: send message: %w", err)
@@ -227,6 +272,24 @@ func (p *WOTDPlugin) handleWOTD(ctx MessageContext) error {
 		return p.SendReply(ctx.RoomID, ctx.EventID, "Failed to fetch Word of the Day.")
 	}
 
+	// Re-prefetch if stored word is missing English translation
+	if !hasEnglishTranslation(example) {
+		slog.Warn("wotd: stored word missing English translation, forcing re-prefetch", "word", word)
+		if err := p.prefetchWord(true); err != nil {
+			slog.Error("wotd: re-prefetch failed", "err", err)
+			return p.SendReply(ctx.RoomID, ctx.EventID, "Failed to fetch Word of the Day. Try again later.")
+		}
+		d := db.Get()
+		err = d.QueryRow(
+			`SELECT word, definition, part_of_speech, example FROM wotd_log WHERE date = ?`,
+			time.Now().UTC().Format("2006-01-02"),
+		).Scan(&word, &definition, &partOfSpeech, &example)
+		if err != nil {
+			slog.Error("wotd: query after re-prefetch", "err", err)
+			return p.SendReply(ctx.RoomID, ctx.EventID, "Failed to fetch Word of the Day.")
+		}
+	}
+
 	msg := p.formatWOTD(word, definition, partOfSpeech, example)
 	return p.SendReply(ctx.RoomID, ctx.EventID, msg)
 }

main.go

@@ -155,7 +155,7 @@ func main() {
 	registry.Register(minifluxPlugin)
 
 	// LLM-powered (passive)
-	registry.Register(plugin.NewLLMPassivePlugin(client, xpPlugin))
+	registry.Register(plugin.NewLLMPassivePlugin(client, xpPlugin, dictClient))
 
 	// Scheduled
 	wotdPlugin := plugin.NewWOTDPlugin(client, dictClient)