refactor(translator): remove unused log dependency and comment out debug logging

docs: add GPT-5 Codex guidelines for CLI usage

- Added detailed guidelines for GPT-5 Codex in Codex CLI.
- Expanded instructions on sandboxing, approvals, editing constraints, and style requirements.
- Included presentation and response formatting best practices.

fix(codex_instructions): update comparison logic to use prefix matching

- Changed system instructions comparison to use `strings.HasPrefix` for improved flexibility.

internal/misc/codex_instructions.go

@@ -20,7 +20,7 @@ func CodexInstructionsForModel(modelName, systemInstructions string) (bool, stri
 	// lastReviewPrompt := ""
 	for _, entry := range entries {
 		content, _ := codexInstructionsDir.ReadFile("codex_instructions/" + entry.Name())
-		if systemInstructions == string(content) {
+		if strings.HasPrefix(systemInstructions, string(content)) {
 			return true, ""
 		}
 		if strings.HasPrefix(entry.Name(), "gpt_5_codex_prompt.md") {

internal/translator/codex/openai/responses/codex_openai-responses_request.go

@@ -6,7 +6,6 @@ import (
 	"strings"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"
-	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
 )
@@ -74,7 +73,7 @@ func ConvertOpenAIResponsesRequestToCodex(modelName string, inputRawJSON []byte,
 	if hasOfficialInstructions {
 		return rawJSON
 	}
-	log.Debugf("instructions not matched, %s\n", originalInstructions)
+	// log.Debugf("instructions not matched, %s\n", originalInstructions)
 
 	if len(inputResults) > 0 {
 		newInput := "[]"