diff --git a/.golangci.yml b/.golangci.yml
index 82d1ddd..1b151e6 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -4,17 +4,10 @@ run:
   tests: true
 
 linters:
+  default: none
   enable:
-    - asciicheck
-    - bodyclose
-    - dogsled
-    - goconst
-    - gocyclo
-    - misspell
-    - nakedret
-    - revive
-    - staticcheck
-    - unconvert
+    - govet
+    - ineffassign
   settings:
     dupl:
       threshold: 100
@@ -44,8 +37,6 @@ linters:
       simple: true
       range-loops: true
       for-loops: false
-    unparam:
-      check-exported: false
   exclusions:
     generated: lax
     rules:
diff --git a/internal/adapter/gemini/handler_generate.go b/internal/adapter/gemini/handler_generate.go
index 0900121..c265f36 100644
--- a/internal/adapter/gemini/handler_generate.go
+++ b/internal/adapter/gemini/handler_generate.go
@@ -1,8 +1,8 @@
 package gemini
 
 import (
-	"ds2api/internal/toolcall"
 	"bytes"
+	"ds2api/internal/toolcall"
 	"encoding/json"
 	"io"
 	"net/http"
diff --git a/internal/adapter/openai/tool_sieve_state.go b/internal/adapter/openai/tool_sieve_state.go
index 6bf006b..1b1b96e 100644
--- a/internal/adapter/openai/tool_sieve_state.go
+++ b/internal/adapter/openai/tool_sieve_state.go
@@ -3,7 +3,6 @@ package openai
 import (
 	"ds2api/internal/toolcall"
 	"strings"
-
 )
 
 type toolStreamSieveState struct {
diff --git a/internal/adapter/openai/tool_sieve_xml.go b/internal/adapter/openai/tool_sieve_xml.go
index 30e686e..ef6d921 100644
--- a/internal/adapter/openai/tool_sieve_xml.go
+++ b/internal/adapter/openai/tool_sieve_xml.go
@@ -4,7 +4,6 @@ import (
 	"ds2api/internal/toolcall"
 	"regexp"
 	"strings"
-
 )
 
 // --- XML tool call support for the streaming sieve ---
diff --git a/internal/admin/handler_raw_samples_test.go b/internal/admin/handler_raw_samples_test.go
index de4fa03..a3dbe39 100644
--- a/internal/admin/handler_raw_samples_test.go
+++ b/internal/admin/handler_raw_samples_test.go
@@ -288,17 +288,17 @@ func TestQueryRawSampleCapturesGroupsBySessionAndMatchesQuestion(t *testing.T) {
 func TestBuildCaptureChainsPreservesCaptureOrderWhenTimestampsCollide(t *testing.T) {
 	snapshot := []devcapture.Entry{
 		{
-			ID:          "cap_continue",
-			CreatedAt:   1712365200,
-			Label:       "deepseek_continue",
-			RequestBody: `{"chat_session_id":"session-collision","message_id":2}`,
+			ID:           "cap_continue",
+			CreatedAt:    1712365200,
+			Label:        "deepseek_continue",
+			RequestBody:  `{"chat_session_id":"session-collision","message_id":2}`,
 			ResponseBody: "data: {\"v\":\"第二段\"}\n\n",
 		},
 		{
-			ID:          "cap_completion",
-			CreatedAt:   1712365200,
-			Label:       "deepseek_completion",
-			RequestBody: `{"chat_session_id":"session-collision","prompt":"题目"}`,
+			ID:           "cap_completion",
+			CreatedAt:    1712365200,
+			Label:        "deepseek_completion",
+			RequestBody:  `{"chat_session_id":"session-collision","prompt":"题目"}`,
 			ResponseBody: "data: {\"v\":\"第一段\"}\n\n",
 		},
 	}
diff --git a/internal/compat/go_compat_test.go b/internal/compat/go_compat_test.go
index 414975d..140f16a 100644
--- a/internal/compat/go_compat_test.go
+++ b/internal/compat/go_compat_test.go
@@ -88,9 +88,9 @@ func TestGoCompatToolcallFixtures(t *testing.T) {
 
 		var expected struct {
 			Calls             []toolcall.ParsedToolCall `json:"calls"`
-			SawToolCallSyntax bool                  `json:"sawToolCallSyntax"`
-			RejectedByPolicy  bool                  `json:"rejectedByPolicy"`
-			RejectedToolNames []string              `json:"rejectedToolNames"`
+			SawToolCallSyntax bool                      `json:"sawToolCallSyntax"`
+			RejectedByPolicy  bool                      `json:"rejectedByPolicy"`
+			RejectedToolNames []string                  `json:"rejectedToolNames"`
 		}
 		mustLoadJSON(t, expectedPath, &expected)
 
diff --git a/internal/deepseek/client_continue_test.go b/internal/deepseek/client_continue_test.go
index 68963e7..fa0b843 100644
--- a/internal/deepseek/client_continue_test.go
+++ b/internal/deepseek/client_continue_test.go
@@ -31,7 +31,7 @@ func TestCallContinuePropagatesPowHeaderToFallbackRequest(t *testing.T) {
 	var seenURL string
 
 	client := &Client{
-		stream:   failingDoer{err: errors.New("stream transport failed")},
+		stream: failingDoer{err: errors.New("stream transport failed")},
 		fallbackS: &http.Client{
 			Transport: roundTripperFunc(func(req *http.Request) (*http.Response, error) {
 				seenPow = req.Header.Get("x-ds-pow-response")
diff --git a/internal/deepseek/constants.go b/internal/deepseek/constants.go
index bd7c858..2d87b3e 100644
--- a/internal/deepseek/constants.go
+++ b/internal/deepseek/constants.go
@@ -6,13 +6,13 @@ import (
 )
 
 const (
-	DeepSeekHost             = "chat.deepseek.com"
-	DeepSeekLoginURL         = "https://chat.deepseek.com/api/v0/users/login"
-	DeepSeekCreateSessionURL = "https://chat.deepseek.com/api/v0/chat_session/create"
-	DeepSeekCreatePowURL     = "https://chat.deepseek.com/api/v0/chat/create_pow_challenge"
-	DeepSeekCompletionURL    = "https://chat.deepseek.com/api/v0/chat/completion"
-	DeepSeekContinueURL      = "https://chat.deepseek.com/api/v0/chat/continue"
-	DeepSeekFetchSessionURL  = "https://chat.deepseek.com/api/v0/chat_session/fetch_page"
+	DeepSeekHost                 = "chat.deepseek.com"
+	DeepSeekLoginURL             = "https://chat.deepseek.com/api/v0/users/login"
+	DeepSeekCreateSessionURL     = "https://chat.deepseek.com/api/v0/chat_session/create"
+	DeepSeekCreatePowURL         = "https://chat.deepseek.com/api/v0/chat/create_pow_challenge"
+	DeepSeekCompletionURL        = "https://chat.deepseek.com/api/v0/chat/completion"
+	DeepSeekContinueURL          = "https://chat.deepseek.com/api/v0/chat/continue"
+	DeepSeekFetchSessionURL      = "https://chat.deepseek.com/api/v0/chat_session/fetch_page"
 	DeepSeekDeleteSessionURL     = "https://chat.deepseek.com/api/v0/chat_session/delete"
 	DeepSeekDeleteAllSessionsURL = "https://chat.deepseek.com/api/v0/chat_session/delete_all"
 )
diff --git a/internal/format/openai/render_chat.go b/internal/format/openai/render_chat.go
index 8eb54b1..c09e870 100644
--- a/internal/format/openai/render_chat.go
+++ b/internal/format/openai/render_chat.go
@@ -4,7 +4,6 @@ import (
 	"ds2api/internal/toolcall"
 	"strings"
 	"time"
-
 )
 
 func BuildChatCompletion(completionID, model, finalPrompt, finalThinking, finalText string, toolNames []string) map[string]any {
diff --git a/internal/format/openai/render_responses.go b/internal/format/openai/render_responses.go
index 899ce90..8fc4dbe 100644
--- a/internal/format/openai/render_responses.go
+++ b/internal/format/openai/render_responses.go
@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-
 )
 
 func BuildResponseObject(responseID, model, finalPrompt, finalThinking, finalText string, toolNames []string) map[string]any {
diff --git a/internal/format/openai/render_stream_events.go b/internal/format/openai/render_stream_events.go
index 1e7cd09..6c1121a 100644
--- a/internal/format/openai/render_stream_events.go
+++ b/internal/format/openai/render_stream_events.go
@@ -71,7 +71,6 @@ func BuildResponsesTextDeltaPayload(responseID, itemID string, outputIndex, cont
 	}
 }
 
-
 func BuildResponsesTextDonePayload(responseID, itemID string, outputIndex, contentIndex int, text string) map[string]any {
 	return map[string]any{
 		"type":          "response.output_text.done",
diff --git a/internal/js/chat-stream/sse_parse_impl.js b/internal/js/chat-stream/sse_parse_impl.js
index 834c392..9a8d16d 100644
--- a/internal/js/chat-stream/sse_parse_impl.js
+++ b/internal/js/chat-stream/sse_parse_impl.js
@@ -20,6 +20,8 @@ function parseChunkForContent(chunk, thinkingEnabled, currentType, stripReferenc
     };
   }
 
+  const outputTokens = extractAccumulatedTokenUsage(chunk);
+
   if (Object.prototype.hasOwnProperty.call(chunk, 'error')) {
     return {
       parsed: true,
@@ -27,13 +29,12 @@ function parseChunkForContent(chunk, thinkingEnabled, currentType, stripReferenc
       finished: true,
       contentFilter: false,
       errorMessage: formatErrorMessage(chunk.error),
-      outputTokens: 0,
+      outputTokens,
       newType: currentType,
     };
   }
 
   const pathValue = asString(chunk.p);
-  const outputTokens = extractAccumulatedTokenUsage(chunk);
 
   if (hasContentFilterStatus(chunk)) {
     return {
@@ -465,10 +466,19 @@ function findAccumulatedTokenUsage(v) {
 }
 
 function toInt(v) {
-  if (typeof v !== 'number' || !Number.isFinite(v)) {
+  if (typeof v === 'number' && Number.isFinite(v)) {
+    return Math.trunc(v);
+  }
+  if (typeof v === 'string' && v.trim() !== '') {
+    const n = Number(v);
+    if (Number.isFinite(n)) {
+      return Math.trunc(n);
+    }
+  }
+  if (typeof v !== 'number') {
     return 0;
   }
-  return Math.trunc(v);
+  return Number.isFinite(v) ? Math.trunc(v) : 0;
 }
 
 function formatErrorMessage(v) {
diff --git a/internal/sse/line.go b/internal/sse/line.go
index 1d9ddae..d55f9e5 100644
--- a/internal/sse/line.go
+++ b/internal/sse/line.go
@@ -20,8 +20,9 @@ func ParseDeepSeekContentLine(raw []byte, thinkingEnabled bool, currentType stri
 	if !parsed {
 		return LineResult{NextType: currentType}
 	}
+	outputTokens := extractAccumulatedTokenUsage(chunk)
 	if done {
-		return LineResult{Parsed: true, Stop: true, NextType: currentType}
+		return LineResult{Parsed: true, Stop: true, NextType: currentType, OutputTokens: outputTokens}
 	}
 	if errObj, hasErr := chunk["error"]; hasErr {
 		return LineResult{
@@ -29,6 +30,7 @@ func ParseDeepSeekContentLine(raw []byte, thinkingEnabled bool, currentType stri
 			Stop:         true,
 			ErrorMessage: fmt.Sprintf("%v", errObj),
 			NextType:     currentType,
+			OutputTokens: outputTokens,
 		}
 	}
 	if code, _ := chunk["code"].(string); code == "content_filter" {
@@ -37,7 +39,7 @@ func ParseDeepSeekContentLine(raw []byte, thinkingEnabled bool, currentType stri
 			Stop:          true,
 			ContentFilter: true,
 			NextType:      currentType,
-			OutputTokens:  extractAccumulatedTokenUsage(chunk),
+			OutputTokens:  outputTokens,
 		}
 	}
 	if hasContentFilterStatus(chunk) {
@@ -46,16 +48,16 @@ func ParseDeepSeekContentLine(raw []byte, thinkingEnabled bool, currentType stri
 			Stop:          true,
 			ContentFilter: true,
 			NextType:      currentType,
-			OutputTokens:  extractAccumulatedTokenUsage(chunk),
+			OutputTokens:  outputTokens,
 		}
 	}
 	parts, finished, nextType := ParseSSEChunkForContent(chunk, thinkingEnabled, currentType)
 	parts = filterLeakedContentFilterParts(parts)
 	return LineResult{
-		Parsed:   true,
-		Stop:     finished,
-		Parts:    parts,
-		NextType: nextType,
-		OutputTokens: extractAccumulatedTokenUsage(chunk),
+		Parsed:       true,
+		Stop:         finished,
+		Parts:        parts,
+		NextType:     nextType,
+		OutputTokens: outputTokens,
 	}
 }
diff --git a/internal/sse/line_test.go b/internal/sse/line_test.go
index 09aa97c..ae6e9ac 100644
--- a/internal/sse/line_test.go
+++ b/internal/sse/line_test.go
@@ -53,6 +53,23 @@ func TestParseDeepSeekContentLineCapturesAccumulatedTokenUsage(t *testing.T) {
 	}
 }
 
+func TestParseDeepSeekContentLineCapturesAccumulatedTokenUsageString(t *testing.T) {
+	res := ParseDeepSeekContentLine([]byte(`data: {"p":"response","o":"BATCH","v":[{"p":"accumulated_token_usage","v":"190"},{"p":"quasi_status","v":"FINISHED"}]}`), false, "text")
+	if res.OutputTokens != 190 {
+		t.Fatalf("expected output token usage 190, got %d", res.OutputTokens)
+	}
+}
+
+func TestParseDeepSeekContentLineErrorIncludesOutputTokens(t *testing.T) {
+	res := ParseDeepSeekContentLine([]byte(`data: {"error":"boom","accumulated_token_usage":123}`), false, "text")
+	if !res.Parsed || !res.Stop {
+		t.Fatalf("expected stop on error: %#v", res)
+	}
+	if res.OutputTokens != 123 {
+		t.Fatalf("expected output token usage 123 on error, got %d", res.OutputTokens)
+	}
+}
+
 func TestParseDeepSeekContentLineContent(t *testing.T) {
 	res := ParseDeepSeekContentLine([]byte(`data: {"p":"response/content","v":"hi"}`), false, "text")
 	if !res.Parsed || res.Stop {
diff --git a/internal/sse/parser.go b/internal/sse/parser.go
index 9deb440..c8ba685 100644
--- a/internal/sse/parser.go
+++ b/internal/sse/parser.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"math"
+	"strconv"
 	"strings"
 
 	"ds2api/internal/deepseek"
@@ -413,6 +414,19 @@ func toInt(v any) (int, bool) {
 			return 0, false
 		}
 		return int(i), true
+	case string:
+		s := strings.TrimSpace(x)
+		if s == "" {
+			return 0, false
+		}
+		if i, err := strconv.Atoi(s); err == nil {
+			return i, true
+		}
+		f, err := strconv.ParseFloat(s, 64)
+		if err != nil || math.IsNaN(f) || math.IsInf(f, 0) {
+			return 0, false
+		}
+		return int(f), true
 	default:
 		return 0, false
 	}
diff --git a/internal/toolcall/toolcalls_parse_item.go b/internal/toolcall/toolcalls_parse_item.go
index b8909ba..269fe3c 100644
--- a/internal/toolcall/toolcalls_parse_item.go
+++ b/internal/toolcall/toolcalls_parse_item.go
@@ -73,7 +73,6 @@ func parseToolCallItem(m map[string]any) (ParsedToolCall, bool) {
 		for _, key := range []string{"arguments", "args", "parameters", "params"} {
 			if v, ok := m[key]; ok {
 				inputRaw = v
-				hasInput = true
 				break
 			}
 		}
diff --git a/internal/util/render.go b/internal/util/render.go
index 2210bc3..085ebb3 100644
--- a/internal/util/render.go
+++ b/internal/util/render.go
@@ -57,9 +57,9 @@ func BuildOpenAIResponseObject(responseID, model, finalPrompt, finalThinking, fi
 		toolCalls := make([]any, 0, len(detected))
 		for _, tc := range detected {
 			toolCalls = append(toolCalls, map[string]any{
-				"type":       "tool_call",
-				"name":       tc.Name,
-				"arguments":  tc.Input,
+				"type":      "tool_call",
+				"name":      tc.Name,
+				"arguments": tc.Input,
 			})
 		}
 		output = append(output, map[string]any{
diff --git a/internal/util/util_edge_test.go b/internal/util/util_edge_test.go
index 41d1c9d..621df2f 100644
--- a/internal/util/util_edge_test.go
+++ b/internal/util/util_edge_test.go
@@ -355,4 +355,3 @@ func TestConvertClaudeToDeepSeekOpusUsesSlowMapping(t *testing.T) {
 		t.Fatalf("expected opus to use slow mapping, got %q", out["model"])
 	}
 }
-