diff --git a/internal/agent/loop_history.go b/internal/agent/loop_history.go
index 2cace9ff..dc411b78 100644
--- a/internal/agent/loop_history.go
+++ b/internal/agent/loop_history.go
@@ -252,7 +252,7 @@ func (l *Loop) buildMessages(ctx context.Context, history []providers.Message, s
 		SandboxWorkspaceAccess: l.sandboxWorkspaceAccess,
 		ShellDenyGroups:        l.shellDenyGroups,
 		SelfEvolve:             l.selfEvolve,
-		ProviderType:           l.provider.Name(),
+		ProviderType:           providerTypeOf(l.provider),
 		CredentialCLIContext:   l.buildCredentialCLIContext(ctx),
 		IsBootstrap:            hadBootstrap && l.agentType != store.AgentTypePredefined,
 	})
diff --git a/internal/agent/memoryflush.go b/internal/agent/memoryflush.go
index ed84c666..28197087 100644
--- a/internal/agent/memoryflush.go
+++ b/internal/agent/memoryflush.go
@@ -108,7 +108,7 @@ func (l *Loop) runMemoryFlush(ctx context.Context, sessionKey string, settings *
 		Mode:         PromptMinimal,
 		ToolNames:    l.filteredToolNames(),
 		HasMemory:    l.hasMemory,
-		ProviderType: l.provider.Name(),
+		ProviderType: providerTypeOf(l.provider),
 	})
 	systemPrompt += "\n\n" + settings.SystemPrompt
 
diff --git a/internal/agent/systemprompt.go b/internal/agent/systemprompt.go
index ec130dc9..7da0676e 100644
--- a/internal/agent/systemprompt.go
+++ b/internal/agent/systemprompt.go
@@ -6,10 +6,25 @@ import (
 	"strings"
 
 	"github.com/nextlevelbuilder/goclaw/internal/bootstrap"
+	"github.com/nextlevelbuilder/goclaw/internal/providers"
 	"github.com/nextlevelbuilder/goclaw/internal/store"
 	"github.com/nextlevelbuilder/goclaw/internal/tools"
 )
 
+// providerTypeOf extracts the DB provider_type (e.g. "chatgpt_oauth", "codex")
+// from a Provider. Falls back to Name() if the provider doesn't expose ProviderType().
+func providerTypeOf(p providers.Provider) string {
+	type providerTyper interface {
+		ProviderType() string
+	}
+	if pt, ok := p.(providerTyper); ok {
+		if t := pt.ProviderType(); t != "" {
+			return t
+		}
+	}
+	return p.Name()
+}
+
 // PromptMode controls which system prompt sections are included.
 // Matches TS PromptMode type in system-prompt.ts.
 type PromptMode string
diff --git a/internal/agent/systemprompt_sections.go b/internal/agent/systemprompt_sections.go
index 1576fc97..77f837d7 100644
--- a/internal/agent/systemprompt_sections.go
+++ b/internal/agent/systemprompt_sections.go
@@ -374,10 +374,17 @@ func buildPersonaReminder(files []bootstrap.ContextFile, agentType, providerType
 
 // needsSOULEcho returns true for providers that benefit from recency-zone personality echo.
 // GPT models have strong recency bias and tend to lose persona in long prompts.
+// Matches first-party OpenAI (chatgpt_oauth) and Codex only — not compat proxies.
 func needsSOULEcho(providerType string) bool {
-	switch strings.ToLower(providerType) {
-	case "openai", "codex":
+	lower := strings.ToLower(providerType)
+	if strings.Contains(lower, "compat") {
+		return false // openai_compat routes to non-OpenAI models
+	}
+	switch {
+	case lower == "openai" || lower == "codex":
 		return true
+	case strings.Contains(lower, "chatgpt"):
+		return true // chatgpt_oauth, chatgpt_plus, etc.
 	}
 	return false
 }
diff --git a/internal/providers/schema_profile.go b/internal/providers/schema_profile.go
index 7944638e..1c156dc7 100644
--- a/internal/providers/schema_profile.go
+++ b/internal/providers/schema_profile.go
@@ -79,11 +79,21 @@ func profileForProvider(name string) SchemaProfile {
 }
 
 // isOpenAIStrict returns true for providers known to support strict tool mode.
-// Only first-party OpenAI and Codex are safe — third-party proxies (OpenRouter,
-// DeepSeek, Groq, DashScope, etc.) may reject nullable unions or the strict flag.
+// Matches first-party OpenAI (including chatgpt_oauth) and Codex.
+// Explicitly excludes openai_compat (proxy for OpenRouter, DeepSeek, Groq, etc.).
 func isOpenAIStrict(name string) bool {
 	lower := strings.ToLower(name)
-	return lower == "openai" || lower == "codex"
+	// Exclude compat/proxy providers first — they route to non-OpenAI models.
+	if strings.Contains(lower, "compat") {
+		return false
+	}
+	switch {
+	case lower == "openai" || lower == "codex":
+		return true
+	case strings.Contains(lower, "chatgpt"):
+		return true // chatgpt_oauth, chatgpt_plus, etc.
+	}
+	return false
 }
 
 // isGeminiName matches config names ("gemini", "gemini-flash") and