fix

apps/api/internal/aiprovider/catalog.go

@@ -30,8 +30,17 @@ var PopularCatalog = []PopularProvider{
 		Name:         "openai",
 		Label:        "OpenAI",
 		BaseURL:      "https://api.openai.com/v1",
-		DefaultModel: "gpt-4o-mini",
+		DefaultModel: "gpt-5.6-luna",
-		Models:       []string{"gpt-4o-mini", "gpt-4o", "gpt-4.1-mini", "gpt-4.1"},
+		Models: []string{
+			"gpt-5.6-luna",
+			"gpt-5.6-terra",
+			"gpt-5.6-sol",
+			"gpt-5.6",
+			"gpt-4o-mini",
+			"gpt-4o",
+			"gpt-4.1-mini",
+			"gpt-4.1",
+		},
 	},
 	{
 		Name:         "google",
@@ -65,8 +74,8 @@ var PopularCatalog = []PopularProvider{
 		Name:         "openrouter",
 		Label:        "OpenRouter",
 		BaseURL:      "https://openrouter.ai/api/v1",
-		DefaultModel: "openai/gpt-4o-mini",
+		DefaultModel: "openai/gpt-5.6-luna",
-		Models:       []string{"openai/gpt-4o-mini", "anthropic/claude-sonnet-4", "google/gemini-2.0-flash-001"},
+		Models:       []string{"openai/gpt-5.6-luna", "openai/gpt-5.6-terra", "openai/gpt-4o-mini", "anthropic/claude-sonnet-4", "google/gemini-2.0-flash-001"},
 	},
 }
 

apps/api/internal/processing/llm_json.go

@@ -15,24 +15,33 @@ const (
 	// spend thousands of tokens in reasoning_content before message.content.
 	// Formula HTML JSON often needs a large completion budget; 4096 hit
 	// finish_reason=length with empty/truncated content in live enhance.
-	MaxTokensEnhance = 16384
+	// GPT-5.6 max_completion_tokens includes hidden reasoning tokens — keep
+	// this high so multi-section HTML descriptions are not truncated.
+	MaxTokensEnhance = 24576
 	// MaxTokensEnhanceRetry is the one-shot length-cap bump ceiling used by
 	// OpenAIClient when finish_reason=length yields empty or unparseable JSON.
-	MaxTokensEnhanceRetry = 32768
+	MaxTokensEnhanceRetry = 40960
 	MaxTokensSEO          = 180
 	MaxTokensCampaign     = 650
-	MaxProductDescRunes   = 400
+	// MaxProductDescRunes caps source description text fed into enhance prompts.
-	MaxAttrKeys           = 10
+	// Kept large enough for existing long/HTML descriptions so the model can
-	MaxAttrValueRunes     = 60
+	// rewrite factually instead of inventing from a truncated stub.
-	MaxBrandInjectRunes   = 500
+	MaxProductDescRunes = 3500
-	MaxCampaignProducts   = 8
+	MaxAttrKeys         = 10
-	MaxCampaignNameRunes  = 80
+	MaxAttrValueRunes   = 60
+	MaxBrandInjectRunes = 500
+	MaxCampaignProducts = 8
+	MaxCampaignNameRunes = 80
 )
 
 // CompleteOptions tunes a single chat completion for structured tasks.
 type CompleteOptions struct {
 	MaxTokens   int
-	Temperature float64 // 0 → client default (≤0.3 for structured)
+	Temperature float64 // 0 → client default (≤0.3 for structured); omitted on GPT-5/o-series
+	// ReasoningEffort is Chat Completions reasoning_effort for GPT-5 / o-series.
+	// Empty → auto: "none" for tiny/probe budgets, "low" for content-heavy calls
+	// (long formula HTML) so visible tokens are not eaten by deep reasoning.
+	ReasoningEffort string
 }
 
 // CompleterWithOptions is optional; OpenAIClient implements it.
@@ -205,7 +214,9 @@ func CompactBrandPrompt(block string) string {
 	return truncateRunes(SanitizeText(block), MaxBrandInjectRunes)
 }
 
-// ProductEnhanceUser builds a short user prompt for title/description enhance.
+// ProductEnhanceUser builds the compact user prompt for title/description enhance.
+// Source description is capped at MaxProductDescRunes so long/HTML inputs stay available
+// for factual rewrite (not invented from a short stub).
 func ProductEnhanceUser(category, name, description string, attrs map[string]any) string {
 	var b strings.Builder
 	b.WriteString("Category: ")

apps/api/internal/processing/llm_json_test.go

@@ -109,11 +109,23 @@ func TestCompleteJSON_returnsRetryError(t *testing.T) {
 }
 
 func TestProductEnhanceUser_truncates(t *testing.T) {
-	long := strings.Repeat("x", 2000)
+	long := strings.Repeat("x", MaxProductDescRunes+500)
 	u := ProductEnhanceUser("Cat", "Name", long, map[string]any{"brand": "B"})
-	if len([]rune(u)) > 900 {
+	// Category/Name/Attrs overhead + MaxProductDescRunes of description.
+	if len([]rune(u)) > MaxProductDescRunes+200 {
 		t.Fatalf("user too long: %d", len([]rune(u)))
 	}
+	descIdx := strings.Index(u, "Description: ")
+	if descIdx < 0 {
+		t.Fatalf("missing Description: in %q", u)
+	}
+	descPart := u[descIdx+len("Description: "):]
+	if i := strings.Index(descPart, "\n"); i >= 0 {
+		descPart = descPart[:i]
+	}
+	if len([]rune(descPart)) > MaxProductDescRunes {
+		t.Fatalf("description runes=%d want <= %d", len([]rune(descPart)), MaxProductDescRunes)
+	}
 	if !strings.Contains(u, "brand") {
 		t.Fatalf("%s", u)
 	}

apps/api/internal/processing/openai.go

@@ -223,13 +223,6 @@ func classifyOpenAITransportErr(model string, err error) (error, bool) {
 	return err, true
 }
 
-type chatRequest struct {
-	Model       string        `json:"model"`
-	Messages    []chatMessage `json:"messages"`
-	Temperature float64       `json:"temperature"`
-	MaxTokens   int           `json:"max_tokens,omitempty"`
-}
-
 type chatMessage struct {
 	Role    string `json:"role"`
 	Content string `json:"content"`
@@ -283,6 +276,7 @@ func (c *OpenAIClient) CompleteWithOptions(ctx context.Context, system, user str
 		temp = 0.3
 	}
 	maxTok := opts.MaxTokens
+	effort := opts.ReasoningEffort
 
 	var lastErr error
 	for attempt := 0; attempt <= c.MaxRetries; attempt++ {
@@ -298,7 +292,7 @@ func (c *OpenAIClient) CompleteWithOptions(ctx context.Context, system, user str
 		if err := c.waitRate(ctx); err != nil {
 			return Completion{}, err
 		}
-		comp, retryable, err := c.doComplete(ctx, system, user, temp, maxTok)
+		comp, retryable, err := c.doComplete(ctx, system, user, temp, maxTok, effort)
 		if err == nil {
 			return comp, nil
 		}
@@ -471,16 +465,11 @@ func (c *OpenAIClient) doEmbed(ctx context.Context, texts []string) ([][]float32
 	return out, false, nil
 }
 
-func (c *OpenAIClient) doComplete(ctx context.Context, system, user string, temperature float64, maxTokens int) (Completion, bool, error) {
+func (c *OpenAIClient) doComplete(ctx context.Context, system, user string, temperature float64, maxTokens int, reasoningEffort string) (Completion, bool, error) {
-	reqBody := chatRequest{
+	reqBody := buildChatCompletionBody(c.Model, []chatMessage{
-		Model: c.Model,
+		{Role: "system", Content: system},
-		Messages: []chatMessage{
+		{Role: "user", Content: user},
-			{Role: "system", Content: system},
+	}, temperature, maxTokens, reasoningEffort)
-			{Role: "user", Content: user},
-		},
-		Temperature: temperature,
-		MaxTokens:   maxTokens,
-	}
 	body, err := json.Marshal(reqBody)
 	if err != nil {
 		return Completion{}, false, err

apps/api/internal/processing/openai_chat_params.go

@@ -0,0 +1,97 @@
+package processing
+
+import (
+	"strings"
+)
+
+// openAIChatUsesMaxCompletionTokens reports models that reject legacy max_tokens
+// on Chat Completions (o-series + GPT-5 family including GPT-5.6).
+// See https://developers.openai.com/api/reference/resources/chat
+func openAIChatUsesMaxCompletionTokens(model string) bool {
+	return openAIReasoningChatModel(model)
+}
+
+// openAIChatOmitsCustomTemperature reports models that reject non-default
+// temperature (only the API default of 1 is accepted, if temperature is sent).
+func openAIChatOmitsCustomTemperature(model string) bool {
+	return openAIReasoningChatModel(model)
+}
+
+// openAIChatSupportsReasoningEffort reports Chat Completions models that accept
+// top-level reasoning_effort (Responses API uses reasoning.effort instead).
+func openAIChatSupportsReasoningEffort(model string) bool {
+	return openAIReasoningChatModel(model)
+}
+
+// openAIReasoningChatModel matches OpenAI reasoning / GPT-5(+).5/5.6 chat models
+// and common snapshot aliases (e.g. gpt-5.6-luna-2026-…).
+func openAIReasoningChatModel(model string) bool {
+	m := strings.ToLower(strings.TrimSpace(model))
+	if m == "" {
+		return false
+	}
+	// Strip provider prefixes used by OpenRouter-style gateways.
+	if i := strings.LastIndex(m, "/"); i >= 0 {
+		m = m[i+1:]
+	}
+	switch {
+	case strings.HasPrefix(m, "o1"),
+		strings.HasPrefix(m, "o3"),
+		strings.HasPrefix(m, "o4"),
+		strings.HasPrefix(m, "gpt-5"),
+		strings.HasPrefix(m, "chatgpt-o"):
+		return true
+	default:
+		return false
+	}
+}
+
+// defaultReasoningEffort picks Chat Completions reasoning_effort when unset.
+// Long formula-HTML enhance uses "low" so max_completion_tokens prefers visible
+// HTML over deep hidden reasoning. Tiny probes use "none" for speed/cost.
+func defaultReasoningEffort(model string, maxTokens int, explicit string) string {
+	explicit = strings.ToLower(strings.TrimSpace(explicit))
+	if explicit != "" {
+		return explicit
+	}
+	if !openAIChatSupportsReasoningEffort(model) {
+		return ""
+	}
+	if maxTokens <= 0 || maxTokens < 512 {
+		return "none"
+	}
+	return "low"
+}
+
+// chatCompletionBody is the Chat Completions JSON body. Temperature is a pointer
+// so reasoning models can omit it entirely (omitempty).
+type chatCompletionBody struct {
+	Model               string        `json:"model"`
+	Messages            []chatMessage `json:"messages"`
+	Temperature         *float64      `json:"temperature,omitempty"`
+	MaxTokens           int           `json:"max_tokens,omitempty"`
+	MaxCompletionTokens int           `json:"max_completion_tokens,omitempty"`
+	ReasoningEffort     string        `json:"reasoning_effort,omitempty"`
+}
+
+// buildChatCompletionBody maps CompleteOptions onto the correct Chat Completions
+// fields for classic vs GPT-5 / o-series models.
+func buildChatCompletionBody(model string, messages []chatMessage, temperature float64, maxTokens int, reasoningEffort string) chatCompletionBody {
+	body := chatCompletionBody{
+		Model:    model,
+		Messages: messages,
+	}
+	if openAIChatUsesMaxCompletionTokens(model) {
+		if maxTokens > 0 {
+			body.MaxCompletionTokens = maxTokens
+		}
+	} else if maxTokens > 0 {
+		body.MaxTokens = maxTokens
+	}
+	if !openAIChatOmitsCustomTemperature(model) {
+		t := temperature
+		body.Temperature = &t
+	}
+	body.ReasoningEffort = defaultReasoningEffort(model, maxTokens, reasoningEffort)
+	return body
+}

apps/api/internal/processing/openai_chat_params_test.go

@@ -0,0 +1,123 @@
+package processing
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestOpenAIReasoningChatModel(t *testing.T) {
+	t.Parallel()
+	cases := []struct {
+		model string
+		want  bool
+	}{
+		{"gpt-5.6-luna", true},
+		{"gpt-5.6-terra", true},
+		{"gpt-5.6-sol", true},
+		{"gpt-5.6", true},
+		{"GPT-5.4", true},
+		{"openai/gpt-5.6-luna", true},
+		{"o1-mini", true},
+		{"o3", true},
+		{"o4-mini", true},
+		{"gpt-4o-mini", false},
+		{"gpt-4.1", false},
+		{"mock-llm", false},
+		{"", false},
+	}
+	for _, tc := range cases {
+		if got := openAIReasoningChatModel(tc.model); got != tc.want {
+			t.Fatalf("openAIReasoningChatModel(%q)=%v want %v", tc.model, got, tc.want)
+		}
+	}
+}
+
+func TestBuildChatCompletionBody_gpt56Luna(t *testing.T) {
+	t.Parallel()
+	body := buildChatCompletionBody("gpt-5.6-luna", []chatMessage{
+		{Role: "system", Content: "sys"},
+		{Role: "user", Content: "ping"},
+	}, 0.2, MaxTokensEnhance, "low")
+	raw, err := json.Marshal(body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var m map[string]any
+	if err := json.Unmarshal(raw, &m); err != nil {
+		t.Fatal(err)
+	}
+	if _, ok := m["temperature"]; ok {
+		t.Fatalf("temperature must be omitted for gpt-5.6-luna, got %v", m["temperature"])
+	}
+	if _, ok := m["max_tokens"]; ok {
+		t.Fatalf("max_tokens must be omitted for gpt-5.6-luna, got %v", m["max_tokens"])
+	}
+	gotMax, _ := m["max_completion_tokens"].(float64)
+	if int(gotMax) != MaxTokensEnhance {
+		t.Fatalf("max_completion_tokens=%v want %d", gotMax, MaxTokensEnhance)
+	}
+	if m["reasoning_effort"] != "low" {
+		t.Fatalf("reasoning_effort=%v want low", m["reasoning_effort"])
+	}
+}
+
+func TestBuildChatCompletionBody_classicModel(t *testing.T) {
+	t.Parallel()
+	body := buildChatCompletionBody("gpt-4o-mini", []chatMessage{
+		{Role: "user", Content: "hi"},
+	}, 0.2, 350, "")
+	raw, err := json.Marshal(body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var m map[string]any
+	if err := json.Unmarshal(raw, &m); err != nil {
+		t.Fatal(err)
+	}
+	if _, ok := m["max_completion_tokens"]; ok {
+		t.Fatalf("max_completion_tokens unexpected for classic model: %v", m)
+	}
+	gotMax, _ := m["max_tokens"].(float64)
+	if int(gotMax) != 350 {
+		t.Fatalf("max_tokens=%v want 350", gotMax)
+	}
+	gotTemp, _ := m["temperature"].(float64)
+	if gotTemp != 0.2 {
+		t.Fatalf("temperature=%v want 0.2", gotTemp)
+	}
+	if _, ok := m["reasoning_effort"]; ok {
+		t.Fatalf("reasoning_effort unexpected for classic model: %v", m)
+	}
+}
+
+func TestBuildChatCompletionBody_probeDefaultsNoneEffort(t *testing.T) {
+	t.Parallel()
+	body := buildChatCompletionBody("gpt-5.6-luna", []chatMessage{
+		{Role: "user", Content: "ping"},
+	}, 0.2, 0, "")
+	if body.ReasoningEffort != "none" {
+		t.Fatalf("reasoning_effort=%q want none for probe", body.ReasoningEffort)
+	}
+	if body.MaxCompletionTokens != 0 || body.MaxTokens != 0 {
+		t.Fatalf("expected no token cap on probe, got %+v", body)
+	}
+	if body.Temperature != nil {
+		t.Fatalf("temperature must be nil for probe on gpt-5.6")
+	}
+}
+
+func TestDefaultReasoningEffort(t *testing.T) {
+	t.Parallel()
+	if got := defaultReasoningEffort("gpt-5.6-luna", MaxTokensEnhance, ""); got != "low" {
+		t.Fatalf("enhance default=%q", got)
+	}
+	if got := defaultReasoningEffort("gpt-5.6-luna", 0, ""); got != "none" {
+		t.Fatalf("probe default=%q", got)
+	}
+	if got := defaultReasoningEffort("gpt-5.6-luna", 100, "medium"); got != "medium" {
+		t.Fatalf("explicit=%q", got)
+	}
+	if got := defaultReasoningEffort("gpt-4o", 1000, ""); got != "" {
+		t.Fatalf("classic=%q", got)
+	}
+}

apps/api/internal/processing/openai_test.go

@@ -179,6 +179,52 @@ func TestOpenAIClient_doComplete_emptyContentWithReasoningJSON(t *testing.T) {
 	}
 }
 
+func TestOpenAIClient_doComplete_gpt56LunaUsesMaxCompletionTokens(t *testing.T) {
+	t.Parallel()
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req map[string]any
+		_ = json.NewDecoder(r.Body).Decode(&req)
+		if _, ok := req["temperature"]; ok {
+			t.Errorf("temperature must be omitted for gpt-5.6-luna")
+		}
+		if _, ok := req["max_tokens"]; ok {
+			t.Errorf("max_tokens must be omitted for gpt-5.6-luna")
+		}
+		gotMax, _ := req["max_completion_tokens"].(float64)
+		if int(gotMax) != MaxTokensEnhance {
+			t.Errorf("max_completion_tokens=%v want %d", gotMax, MaxTokensEnhance)
+		}
+		if req["reasoning_effort"] != "low" {
+			t.Errorf("reasoning_effort=%v want low", req["reasoning_effort"])
+		}
+		_ = json.NewEncoder(w).Encode(map[string]any{
+			"model": "gpt-5.6-luna",
+			"choices": []map[string]any{{
+				"finish_reason": "stop",
+				"message": map[string]any{
+					"role":    "assistant",
+					"content": `{"name":"Acme Monitor","description":"<h1>Acme Monitor</h1><p>IPS panel for office use.</p>"}`,
+				},
+			}},
+			"usage": map[string]int{"prompt_tokens": 20, "completion_tokens": 40, "total_tokens": 60},
+		})
+	}))
+	defer srv.Close()
+	c := NewOpenAIClient("test-key", srv.URL, "gpt-5.6-luna", 0, 1)
+	c.HTTPClient = srv.Client()
+	comp, err := c.CompleteWithOptions(context.Background(), "sys", "user", CompleteOptions{
+		MaxTokens:       MaxTokensEnhance,
+		Temperature:     DefaultStructuredTemp,
+		ReasoningEffort: "low",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(comp.Text, "Acme Monitor") {
+		t.Fatalf("text=%q", comp.Text)
+	}
+}
+
 func TestOpenAIClient_doComplete_emptyContentLengthRetriesWithBudget(t *testing.T) {
 	t.Parallel()
 	calls := 0

apps/api/internal/processing/sanitize.go

@@ -11,7 +11,7 @@ import (
 const maxPromptFieldRunes = 4000
 
 // maxOutputFieldRunes bounds stored / polled model text (titles + multi-section
-// formula HTML descriptions). Must stay well above MaxTokensEnhance (~16k tokens)
+// formula HTML descriptions). Must stay well above MaxTokensEnhance (~24k tokens)
 // so SanitizeOutput does not chop JSON completion bodies or A1 HTML mid-string.
 const maxOutputFieldRunes = 120000
 

apps/api/internal/processing/steps.go

@@ -800,8 +800,9 @@ func (e *Engine) enhance(ctx context.Context, in ProductInput, category string,
 	logEnhancePrompt(in, catUID, catName, system, user)
 	started := time.Now()
 	comp, obj, err := CompleteJSON(ctx, e.Completer, system, user, CompleteOptions{
-		MaxTokens:   MaxTokensEnhance,
+		MaxTokens:       MaxTokensEnhance,
-		Temperature: DefaultStructuredTemp,
+		Temperature:     DefaultStructuredTemp,
+		ReasoningEffort: "low",
 	})
 	elapsed := time.Since(started)
 	if err != nil {
@@ -891,8 +892,9 @@ func (e *Engine) enhance(ctx context.Context, in ProductInput, category string,
 		retryUser := user + descriptionFormulaRetrySuffix
 		retryStarted := time.Now()
 		comp2, obj2, err2 := CompleteJSON(ctx, e.Completer, system, retryUser, CompleteOptions{
-			MaxTokens:   MaxTokensEnhance,
+			MaxTokens:       MaxTokensEnhance,
-			Temperature: DefaultStructuredTemp,
+			Temperature:     DefaultStructuredTemp,
+			ReasoningEffort: "low",
 		})
 		elapsed += time.Since(retryStarted)
 		comp.PromptTokens += comp2.PromptTokens

apps/web/src/lib/admin-ai-roles.ts

@@ -31,7 +31,7 @@ export const AI_ROLE_META: Record<
 	processing: {
 		label: "Processing",
 		description: "Product pipeline chat/completions (titles, descriptions, enhance).",
-		modelPlaceholder: "gpt-4o-mini"
+		modelPlaceholder: "gpt-5.6-luna"
 	},
 	vectorization: {
 		label: "Vectorization",
@@ -42,13 +42,13 @@ export const AI_ROLE_META: Record<
 		label: "Docs / API",
 		description:
 			"Future docs/API assistant slot — /docs Ask stays rule-based and must never call this role.",
-		modelPlaceholder: "gpt-4o-mini"
+		modelPlaceholder: "gpt-5.6-luna"
 	},
 	support: {
 		label: "Support",
 		description:
 			"Ticket auto-reply AI fallback — configure provider/key/model here; enable delivery in Support knowledge → Auto-reply.",
-		modelPlaceholder: "gpt-4o-mini"
+		modelPlaceholder: "gpt-5.6-luna"
 	}
 };
 

docs/local-llm-tuning.md

@@ -16,27 +16,29 @@ Restart **both** `api` and `worker` after changing `OPENAI_*`. Worker logs shoul
 
 ## Product enhance model choice
 
-Admin AI role for **product enhance** should prefer a **fast non-reasoning chat model** that emits `message.content` (JSON) under budget.
+Admin AI role for **product enhance** should prefer a model that emits `message.content` (JSON) under budget. Recommended OpenAI: **`gpt-5.6-luna`** (high-volume / cost-efficient GPT-5.6 tier).
 
-Reasoning / “code-fast” style models often spend the entire `max_tokens` budget in `reasoning_content`, then return `finish_reason=length` with empty or truncated JSON. Descrybe retries once at `MaxTokensEnhanceRetry` and may synthesize formula HTML as salvage — that is **not** live LLM formula compliance.
+Reasoning / “code-fast” style models often spend the entire completion budget in `reasoning_content`, then return `finish_reason=length` with empty or truncated JSON. Descrybe retries once at `MaxTokensEnhanceRetry` and may synthesize formula HTML as salvage — that is **not** live LLM formula compliance.
 
-If enhance logs show `finish_reason=length` with empty/truncated content even after the retry, switch Admin enhance to a non-reasoning model.
+For GPT-5 / o-series Chat Completions, the client sends `max_completion_tokens` (not `max_tokens`), omits custom `temperature`, and sets `reasoning_effort` (`none` for probes, `low` for long formula-HTML enhance) so visible HTML is not eaten by deep reasoning.
+
+If enhance logs show `finish_reason=length` with empty/truncated content even after the retry, switch Admin enhance to a lower-reasoning or classic chat model (e.g. `gpt-4o-mini`).
 
 ## Hardening defaults (code)
 
 | Constant | Value | Where |
 |----------|------:|-------|
-| `DefaultStructuredTemp` | `0.2` (capped ≤0.3) | `processing/llm_json.go`, `openai.go` |
+| `DefaultStructuredTemp` | `0.2` (capped ≤0.3; omitted on GPT-5/o-series) | `processing/llm_json.go`, `openai.go` |
-| `MaxTokensEnhance` | `16384` | product title/description (reasoning + formula HTML JSON) |
+| `MaxTokensEnhance` | `24576` | product title + multi-section HTML description JSON |
-| `MaxTokensEnhanceRetry` | `32768` | one-shot bump on `finish_reason=length` empty/truncated JSON |
+| `MaxTokensEnhanceRetry` | `40960` | one-shot bump on `finish_reason=length` empty/truncated JSON |
 | `MaxTokensSEO` | `180` | meta title/description |
 | `MaxTokensCampaign` | `650` | email JSON |
-| `MaxProductDescRunes` | `400` | user context |
+| `MaxProductDescRunes` | `3500` | source description in enhance user context |
 | `MaxAttrKeys` / `MaxAttrValueRunes` | `10` / `60` | attrs in enhance prompt |
 | `MaxBrandInjectRunes` | `500` | brand kit block |
 | `MaxCampaignProducts` | `8` | campaign product list |
 
-OpenAI-compatible chat completions here use a single `max_tokens` completion budget (no separate reasoning vs content split on typical gateways). Length-cap handling lives in `OpenAIClient.doComplete` / `CompleteWithOptions`.
+Classic OpenAI-compatible chat completions use `max_tokens`. GPT-5 / o-series use `max_completion_tokens` (budget includes hidden reasoning tokens). Length-cap handling lives in `OpenAIClient.doComplete` / `CompleteWithOptions`.
 
 ## Prompt style
 
@@ -49,7 +51,7 @@ OpenAI-compatible chat completions here use a single `max_tokens` completion bud
 
 `processing.CompleteJSON`:
 
-1. Call Completer with `max_tokens` + low temperature
+1. Call Completer with completion budget + low temperature (classic) / GPT-5.6 param mapping
 2. `StripJSONFences` / isolate `{…}`
 3. On parse fail → **one retry** with `INVALID. Reply with ONLY one JSON object…`
 4. Call sites fall back to originals/templates instead of storing garbage prose as titles