fix(channels): CodeArts 签名按参考重写（华为云 SDK-HMAC-SHA256）+ 完整 4 步领取

## 问题：签名是实现者凭印象编的原实现用 `SDK-HMAC-SHA256 Credential={ak}/{ts}/{nonce}/sdk_request` —— 那是另一套协议（阿里风格）的形状，与参考的**华为云 SDK-HMAC-SHA256** 完全不同： - canonical request 拼装错（参考是 METHOD\nURI\nQUERY\n排序后的 k:v 行\n\nSIGNEDHEADERS\nPAYLOADHASH） - string-to-sign 格式错（参考是 "SDK-HMAC-SHA256\n{dateStamp}\n{sha256(canonical)}"） - Authorization 头用 Credential= 而非 **Access=** - 少了 x-sdk-content-sha256 / x-security-token 参与签名 - URI 末尾未补 '/' ⇒ 服务端只会回 `APIG.0301 ... verify ak sk signature fail`，看起来像"账号/权限问题"，这个平台注定领不到额度。 ## 修逐行对齐参考 `sign.ts:signRequestHuawei` + `codearts-credits.ts`： 1. canonical request / string-to-sign / signature 全部照参考 2. 参与签名的头：host / x-sdk-date / x-sdk-content-sha256 / x-security-token （非 GET 再加 content-type），按字典序拼 SignedHeaders 3. Authorization = `SDK-HMAC-SHA256 Access={ak},SignedHeaders=…,Signature=…` 4. Agent-Type / X-Language 是**签名后**追加的，绝不进 canonical（否则验签失败） 5. URI 末尾补 '/' 6. 完整领取 4 步（参考的 6 步判定顺序）：账户类型 → 活动列表 → claim →（benefit.id 非空时）confirm；用 done 哨兵回给 claim_daily（它自己发多个请求，契约只发一个） - 非积分账户 → inactive（Token 账户不该被报成"领取失败"） - activity.claimable=false 且状态属已领取态 → already-claimed（**唯一的幂等保护**，本协议没有幂等键） - confirm 失败不算整体失败（积分已在待确认态），只是降级提示 ## 判据（差分，与参考逐字节一致） `TestCodeArtsSignatureMatchesReference` + `tools/codearts_sig_expected.mjs` （照抄参考函数生成期望值）。覆盖 canonical / string_to_sign / signature / SignedHeaders / Authorization 形状 / canonical 不得含签名后追加的头。变异验证：`Access=`→`Credential=`、去掉 content-type 参与签名、URI 不补斜杠 —— 三个全部被抓。 ★ 修判据自身缺陷：首版探针**自己重算** canonical，导致真实签名被改坏时判据仍绿（去掉 content-type 的变异存活）。改为让签名函数返回真实中间值，探针直接取用。 ## 文档新增 docs/channels-parity.md：与参考逐平台对齐清单（登录 / 额度 / 推理链路三张表 + 差分判据表 + 未对齐项按影响排序），未对齐项**明示**而非含糊。
2026-11-07 09:47:23 +00:00 · 2026-10-13 15:38:35 +08:00
parent 41ff6d1be3
commit 1586a051da
5 changed files with 542 additions and 37 deletions
--- a/docs/channels-parity.md
+++ b/docs/channels-parity.md
@ -0,0 +1,68 @@
+# channels 插件与参考实现（dsh-our-free-model / channel-pack）的对齐清单
+
+参考位置：`vendor/channel-pack/src/`（本地克隆 `/tmp/pi-github-repos/Ebony-Vinyl/dsh-our-free-model/`）。
+对齐口径：**照对方代码行为逐行移植**，并配「与参考逐字节一致」的差分判据。
+
+状态口径：
+- ✅ 已对齐（有实现 + 有判据，关键算法与参考做逐字节差分）
+- ⚠️ 部分对齐（主链路可用，高阶环节缺失）
+- ❌ 未对齐（参考有的环节没有实现）
+
+## 一、登录（登录 = 拿到凭据并接入上游源）
+
+| 平台 | flow | 参考模块 | 状态 | 说明 |
+|---|---|---|---|---|
+| trae | callback | trae-oauth.ts | ✅ | 17 参数、machine/device_id（hex32）、login_trace_id=末16位、Cloud-IDE-JWT |
+| lobsterai | callback | lobsterai-oauth.ts | ✅ | loopback /auth/callback、5 字段交换、版本号动态解析（远端 `data.value.version`） |
+| gemini | callback | gemini-oauth.ts | ✅ | client_secret、/oauth-callback、localhost 主机、6 scope、access_type=offline |
+| minimax | device-poll | minimax-oauth.ts | ✅ | PKCE S256 设备码、scope/audience |
+| cline | device-poll | cline-oauth.ts | ✅ | WorkOS 设备码 → register 两跳 |
+| qoder | device-poll | qoder-oauth.ts | ⚠️ | 登录是纯 HTTP PKCE（已对齐）；**加密推理**需 WASM（见三） |
+| zcode | init-poll | zcode-login.ts | ⚠️ | 登录链路已对齐；**领取**需滑块验证码（见三） |
+| loomy | wechat-poll | loomy-wechat-login.ts | ✅ | 真 appId/uuid 正则、HMAC-SHA1 账号签名（openssl） |
+| raccoon | qr-poll | raccoon-oauth.ts | ✅ | 本地 code、状态机 pending/logging/canceled/success |
+| buddy | state-poll | buddy-oauth.ts | ✅ | state→token 轮询 |
+| opencode | paste | opencode-auth.ts | ✅ | 手动 key |
+| codearts | paste | — | ✅ | 手动凭据 |
+
+## 二、额度（领额度 = 每日领取 + 余额查询）
+
+| 平台 | 参考模块 | 状态 | 说明 |
+|---|---|---|---|
+| codearts | codearts-credits.ts | ✅ | 华为云 SDK-HMAC-SHA256 逐字节对齐（差分判据）+ 4 步领取（账户→活动→claim→confirm） |
+| buddy | credits.ts | ✅ | 双层嵌套余额、身份头、只累加有效包 |
+| trae | trae-credits.ts | ✅ | Cloud-IDE-JWT + 派生设备身份（差分判据） |
+| lobsterai | lobsterai-credits.ts | ⚠️ | 余额已对齐（profile-summary）；**每日活动领取缺**（`/api/client-activities[/slot]`） |
+| qoder | qoder-credits.ts | ⚠️ | 余额已对齐（`/sash/api/v2/me/usage`）；**活动领取缺**（`/sash/api/v1/me/campaigns`） |
+| minimax | minimax-credits.ts | ✅ | 两步签到（status + claim） |
+| cline | cline-quota.ts | ✅ | plan usage-limits |
+| 其余 | — | ⚠️ | 参考无额度端点，如实显示"不可用"（不编造） |
+
+## 三、推理链路（高阶，参考有专门模块）
+
+| 平台 | 参考模块 | 状态 | 影响 |
+|---|---|---|---|
+| qoder | qoder-wasm.ts (706) + qoder-envelope.ts (226) + qoder-machine.ts (510) | ❌ | 公开端点只认少量通用模型名；**模型目录里的 key（qfmodel/dmodel…）需 WASM 加密端点** |
+| zcode | zcode-captcha.ts (2119) + zcode-carrier*.ts | ❌ | 模型请求自 3.14.4 起**不再索要**验证码；**领取始终索要**（code 3007），且一次性 |
+| gemini | gemini-sigstore.ts (268) | ❌ | thoughtSignature 缓存；缺失**不报错但可能悄悄降质** |
+| loomy | loomy-sign.ts | ✅ | 已对齐（仅账号端点用，唯一调用不带 query） |
+| 各平台 | captcha-*.ts (6 模块 1223 行) | ❌ | 验证码池/载体/退避 |
+
+## 四、差分判据（关键算法的"与参考一致"证据）
+
+| 判据 | 覆盖 | 生成器 |
+|---|---|---|
+| `TestCodeArtsSignatureMatchesReference` | 华为云 canonical / string-to-sign / signature / SignedHeaders / Authorization | `tools/codearts_sig_expected.mjs` |
+| `TestTraeDeriveMatchesReference` | seededStream / device_id15 / market uuid / session id | `tools/trae_derive_expected.mjs` |
+| `TestTraeCheckinHeaders` | Cloud-IDE-JWT + 派生设备身份 + 客户端头 |
+| `TestCallbackPlatformsLoopback` | 三平台回调路径 + state 规则（Trae 无 state） |
+| `TestLobsterLoopbackClosedLoop` | 有道 loopback 闭环 + state 拒绝 + 凭据完整性 |
+| `TestXDisplaySelectionReclaimsStaleLocks` | 浏览器栈显示器锁回收（防号段烧穿） |
+
+## 五、已知未对齐项汇总（按对用户的影响排序）
+
+1. **qoder 加密推理（WASM）** — 影响：拿不到模型目录里的 key（如 Qwen 系列）
+2. **zcode 领取验证码** — 影响：模型可用，但**每日额度领不到**（3007）
+3. **lobsterai / qoder 活动领取** — 影响：余额能看，活动奖励领不到
+4. **gemini thoughtSignature 缓存** — 影响：工具调用质量可能悄悄下降
+5. **captcha 池/载体（6 模块）** — 影响：zcode 领取的前置基础设施
--- a/internal/core/codearts_sig_expected.json
+++ b/internal/core/codearts_sig_expected.json
@ -0,0 +1,38 @@
+[
+ {
+  "method": "GET",
+  "url": "https://snap-access.cn-north-4.myhuaweicloud.com/snap-manager/v1/statistics/plugin",
+  "body": "",
+  "ak": "AK1",
+  "sk": "SK1",
+  "st": "TOK1",
+  "canonical": "GET\n/snap-manager/v1/statistics/plugin/\n\nhost:snap-access.cn-north-4.myhuaweicloud.com\nx-sdk-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\nx-sdk-date:20261013T150405Z\nx-security-token:TOK1\n\nhost;x-sdk-content-sha256;x-sdk-date;x-security-token\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+  "string_to_sign": "SDK-HMAC-SHA256\n20261013T150405Z\nf40918a3339c9db2251933dcce410db05ff8a403de2767bc642140ea93cdc182",
+  "signature": "5332d627c3b8f14973afe41905f23dce75eaf9a34134dff670cb19835beb0549",
+  "signed_headers": "host;x-sdk-content-sha256;x-sdk-date;x-security-token"
+ },
+ {
+  "method": "GET",
+  "url": "https://snap-access.cn-north-4.myhuaweicloud.com/v1/ops/delivery?channel=IDE",
+  "body": "",
+  "ak": "AK2",
+  "sk": "SK2",
+  "st": "",
+  "canonical": "GET\n/v1/ops/delivery/\nchannel=IDE\nhost:snap-access.cn-north-4.myhuaweicloud.com\nx-sdk-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\nx-sdk-date:20261013T150405Z\nx-security-token:\n\nhost;x-sdk-content-sha256;x-sdk-date;x-security-token\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+  "string_to_sign": "SDK-HMAC-SHA256\n20261013T150405Z\n3c849b40bbad69b981eaf280e162878bf00687d08cb45df43ac792fc23add4f1",
+  "signature": "a01248a4121fd943f0f3f07aac101cd649ddf34d162729bf06a6a12ae9916b1a",
+  "signed_headers": "host;x-sdk-content-sha256;x-sdk-date;x-security-token"
+ },
+ {
+  "method": "POST",
+  "url": "https://snap-access.cn-north-4.myhuaweicloud.com/v1/ops/claim",
+  "body": "{\"campaignId\":\"C1\",\"channel\":\"IDE\"}",
+  "ak": "AK3",
+  "sk": "SK3",
+  "st": "T3",
+  "canonical": "POST\n/v1/ops/claim/\n\ncontent-type:application/json\nhost:snap-access.cn-north-4.myhuaweicloud.com\nx-sdk-content-sha256:85e6ce395b620ecb748af3b217f47107ebb5906d1a83fe7db221d9845de29f19\nx-sdk-date:20261013T150405Z\nx-security-token:T3\n\ncontent-type;host;x-sdk-content-sha256;x-sdk-date;x-security-token\n85e6ce395b620ecb748af3b217f47107ebb5906d1a83fe7db221d9845de29f19",
+  "string_to_sign": "SDK-HMAC-SHA256\n20261013T150405Z\n554c2607cff324a770b55e78e2a1c58afe466abf5e4eaa104a6e1fa96acfc733",
+  "signature": "e5faa52ec51c36b38804aac45a8a19876314cec465ab8f905100e657e8ea68d5",
+  "signed_headers": "content-type;host;x-sdk-content-sha256;x-sdk-date;x-security-token"
+ }
+]
--- a/internal/core/codearts_sign_test.go
+++ b/internal/core/codearts_sign_test.go
@ -0,0 +1,97 @@
+package core
+
+import (
+	"encoding/json"
+	"os"
+	"strings"
+	"testing"
+)
+
+// CodeArts 的华为云 SDK-HMAC-SHA256 签名必须与参考**逐字节一致**，否则服务端
+// 返回 `verify ak sk signature fail`，而这个平台的领取就永远失败 —— 且失败原因
+// 会被误读成"账号问题"。此前插件里的实现是凭印象编的另一套形状
+// （Credential={ak}/{ts}/{nonce}/sdk_request），必然验签失败。
+//
+// 期望值由参考实现（sign.ts:signRequestHuawei，Node + node:crypto）生成：
+//
+//	node tools/codearts_sig_expected.mjs > internal/core/codearts_sig_expected.json
+//
+// 判据覆盖：canonical request 的拼装、string-to-sign 格式、最终 signature、
+// 以及参与签名的头列表（顺序与内容）。
+func TestCodeArtsSignatureMatchesReference(t *testing.T) {
+	raw, err := os.ReadFile("codearts_sig_expected.json")
+	if err != nil {
+		t.Skipf("缺差分数据（跳过）: %v", err)
+	}
+	var cases []struct {
+		Method        string `json:"method"`
+		URL           string `json:"url"`
+		Body          string `json:"body"`
+		AK            string `json:"ak"`
+		SK            string `json:"sk"`
+		ST            string `json:"st"`
+		Canonical     string `json:"canonical"`
+		StringToSign  string `json:"string_to_sign"`
+		Signature     string `json:"signature"`
+		SignedHeaders string `json:"signed_headers"`
+	}
+	if err := json.Unmarshal(raw, &cases); err != nil {
+		t.Fatal(err)
+	}
+	if len(cases) == 0 {
+		t.Fatal("差分数据为空")
+	}
+
+	c := kernelTestCore(t)
+	ps := c.Plugins()
+	src, err := readBundledChannels(t)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := ps.LoadSource("channels", src); err != nil {
+		t.Fatal(err)
+	}
+
+	for i, tc := range cases {
+		got, err := ps.Call("channels", "__codearts_sign_probe", map[string]interface{}{
+			"method": tc.Method, "url": tc.URL, "body": tc.Body,
+			"ak": tc.AK, "sk": tc.SK, "st": tc.ST, "date": "20261013T150405Z",
+		})
+		if err != nil {
+			t.Fatalf("case %d probe: %v", i, err)
+		}
+		w, _ := got.(map[string]interface{})
+		m, _ := w["json"].(map[string]interface{})
+		if m == nil {
+			t.Fatalf("case %d 无 json: %#v", i, got)
+		}
+		if m["error"] != nil {
+			t.Fatalf("case %d 探针报错: %v", i, m["error"])
+		}
+		if s, _ := m["canonical"].(string); s != tc.Canonical {
+			t.Errorf("case %d canonical 不一致\n  实得: %q\n  参考: %q", i, s, tc.Canonical)
+		}
+		if s, _ := m["string_to_sign"].(string); s != tc.StringToSign {
+			t.Errorf("case %d string-to-sign 不一致\n  实得: %q\n  参考: %q", i, s, tc.StringToSign)
+		}
+		if s, _ := m["signature"].(string); s != tc.Signature {
+			t.Errorf("case %d signature 不一致: 实得 %s 参考 %s", i, s, tc.Signature)
+		}
+		if s, _ := m["signed_headers"].(string); s != tc.SignedHeaders {
+			t.Errorf("case %d SignedHeaders 不一致: 实得 %q 参考 %q", i, s, tc.SignedHeaders)
+		}
+		// Authorization 头必须是 `SDK-HMAC-SHA256 Access=...`（不是 Credential=）
+		if s, _ := m["authorization"].(string); len(s) == 0 ||
+			s[:len("SDK-HMAC-SHA256 Access=")] != "SDK-HMAC-SHA256 Access=" {
+			t.Errorf("case %d Authorization 形状应为 SDK-HMAC-SHA256 Access=…，实得 %q", i, s)
+		}
+		// 签名后追加的头绝不能进 canonical
+		if s, _ := m["canonical"].(string); len(s) > 0 {
+			for _, bad := range []string{"Agent-Type", "X-Language", "agent-type", "x-language"} {
+				if strings.Contains(s, bad) {
+					t.Errorf("case %d canonical 里出现了签名后追加的头 %s（会导致验签失败）", i, bad)
+				}
+			}
+		}
+	}
+}
--- a/internal/lua/plugins/channels.lua
+++ b/internal/lua/plugins/channels.lua
@ -52,7 +52,7 @@ plugin.kernel = { "add_source", "list_sources", "probe_all", "reset_health", "st

 -- WebUI 可调用的导出函数（POST /api/plugins/channels/call/{fn}）。
 -- set_endpoints 让运维把渠道端点指向自建代理/镜像；测试用它打假上游。
-plugin.exports = { "set_endpoints", "account_add", "account_list", "account_update", "account_delete", "account_test", "account_refresh", "account_reorder", "account_reset", "account_retest", "model_list", "model_refresh", "model_set_disabled", "model_set_disabled_many", "model_set_all_disabled", "model_clear_dead", "provider_status", "provider_set_enabled", "provider_get_order", "provider_set_order", "credits_claim_all", "credits_status", "credits_balances", "credits_permanent_lock", "backup_export", "backup_import", "backup_status", "auto_checkin", "gateway_get_enabled", "gateway_set_enabled", "usage_token_ledger", "usage_badge", "usage_badge_preference", "onboarding_status", "onboarding_claim", "__trae_derive_probe" }
+plugin.exports = { "set_endpoints", "account_add", "account_list", "account_update", "account_delete", "account_test", "account_refresh", "account_reorder", "account_reset", "account_retest", "model_list", "model_refresh", "model_set_disabled", "model_set_disabled_many", "model_set_all_disabled", "model_clear_dead", "provider_status", "provider_set_enabled", "provider_get_order", "provider_set_order", "credits_claim_all", "credits_status", "credits_balances", "credits_permanent_lock", "backup_export", "backup_import", "backup_status", "auto_checkin", "gateway_get_enabled", "gateway_set_enabled", "usage_token_ledger", "usage_badge", "usage_badge_preference", "onboarding_status", "onboarding_claim", "__trae_derive_probe", "__codearts_sign_probe" }



@ -799,43 +799,204 @@ local PLATFORMS = {
  },
 }

-- CodeArts 的 SDK-HMAC-SHA256 签到钩子（照参考 codearts-credits.ts 逆向）。
-- 绑在 PLATFORMS 表定义之后：claim_daily 读取 plat.claim_fn，checkin 表驱动
-- 不动签名请求（参考注释也点明这一点），所以用钩子生成签名后的请求形状。
-do
-  local ca
-  for _, p in ipairs(PLATFORMS) do
-    if p.id == "codearts" then ca = p break end
+-- 华为云 snap-access 引擎域名（连接与签名都用它）。
+local CODEARTS_SNAP = "https://snap-access.cn-north-4.myhuaweicloud.com"
+
+-- CodeArts（华为云 snap-access）的请求签名与每日领取。
+--
+-- 逐行对齐参考 `sign.ts:signRequestHuawei` + `codearts-credits.ts`。
+-- 此前这里的实现是**凭印象编的**（用 `Credential={ak}/{ts}/{nonce}/sdk_request`
+-- 那套阿里风格形状），与参考的华为云 SDK-HMAC-SHA256 完全不同 —— 签名不可能通过，
+-- 这个平台注定领不到额度。对齐要点：
+--   1. canonical request = METHOD\nURI\nQUERY\n(排序后的 k:v 行)\n\nSIGNEDHEADERS\nPAYLOADHASH
+--   2. string to sign    = "SDK-HMAC-SHA256\n{dateStamp}\n{sha256(canonical)}"
+--   3. signature         = HMAC-SHA256(sk, stringToSign)
+--   4. Authorization     = "SDK-HMAC-SHA256 Access={ak},SignedHeaders=...,Signature=..."
+--      （**是 Access= 不是 Credential=**）
+--   5. 参与签名的头：host / x-sdk-date / x-sdk-content-sha256 / x-security-token
+--      （+ 非 GET 时的 content-type）；按字典序拼 SignedHeaders。
+--   6. Agent-Type / X-Language 是**签名后**追加的，绝不能进 canonical（否则验签失败）。
+--   7. URI 末尾必须补 '/'。
+local function codeartsDateStamp()
+  -- 参考用 ISO8601 去冒号与短横：20261013T150405Z
+  return os.date("!%Y%m%dT%H%M%SZ")
 end
-  if ca then
-    -- SDK-HMAC-SHA256 派生签名密钥链（照参考 canonical request 形状）。
-    ca.claim_fn = function(plat, tok, args)
-      local url = plat.checkin.url
-      local method = plat.checkin.method or "GET"
-      local host = url:match("^https?://([^/:]+)")
-      local path = url:match("^https?://[^/]+(/[^?]*)")
-      local ts = tostring(os.time and os.time() or 0)
-      local nonce = tostring(math.random(1e12))
-      local canonical = method .. "\n" .. (path or "/") .. "\n" .. ts .. "\n" .. nonce
-      local secret = tok or ""
-      local kDate = hmac_sha256_hex("SDK" .. secret, ts)
-      local kNonce = hmac_sha256_hex(kDate, nonce)
-      local kSigning = hmac_sha256_hex(kNonce, "sdk_request")
-      local signature = hmac_sha256_hex(kSigning, canonical)
-      return {
-        url = url,
-        method = method,
-        headers = {
-          ["Host"] = host,
-          ["X-Sdk-Date"] = ts,
-          ["Authorization"] = "SDK-HMAC-SHA256 Credential="
-            .. (args and args.access_key or "") .. "/" .. ts .. "/" .. nonce
-            .. "/sdk_request, SignedHeaders=host, Signature=" .. signature,
-        },
+
+-- codeartsSignedRequest(method, url, cred, body)：返回可直接发出的 {url,method,headers,body}。
+local function codeartsSignedRequest(method, url, cred, body)
+  local ak = cred and (cred.access_key_id or cred.access_key) or ""
+  local sk = cred and (cred.secret_access_key or cred.secret_key) or ""
+  local st = cred and (cred.security_token or "") or ""
+  if ak == "" or sk == "" then return nil, "凭据缺少 AK/SK" end
+  local host = url:match("^https?://([^/]+)")
+  local uri = url:match("^https?://[^/]+(/[^?]*)") or "/"
+  if uri:sub(-1) ~= "/" then uri = uri .. "/" end
+  local query = url:match("%?([^#]*)$") or ""
+  local payload = body or ""
+  local payloadHash = sha256_hex(payload)
+  local dateStamp = codeartsDateStamp()
+
+  -- 参与签名的头（小写键），按字典序
+  local h = {
+    ["host"] = host,
+    ["x-sdk-date"] = dateStamp,
+    ["x-sdk-content-sha256"] = payloadHash,
+    ["x-security-token"] = st,
  }
+  if method:upper() ~= "GET" then h["content-type"] = "application/json" end
+  local keys = {}
+  for k in pairs(h) do keys[#keys + 1] = k end
+  table.sort(keys)
+  local lines, signedNames = {}, {}
+  for _, k in ipairs(keys) do
+    lines[#lines + 1] = k .. ":" .. h[k]
+    signedNames[#signedNames + 1] = k
+  end
+  local signedHeaders = table.concat(signedNames, ";")
+  local canonical = table.concat({
+    method:upper(), uri, query, table.concat(lines, "\n"), "", signedHeaders, payloadHash,
+  }, "\n")
+  local stringToSign = "SDK-HMAC-SHA256\n" .. dateStamp .. "\n" .. sha256_hex(canonical)
+  local signature = hmac_sha256_hex(sk, stringToSign)
+
+  -- 把中间值一并带出：判据必须比对**真实函数算出的** canonical / string-to-sign，
+  -- 而不是自己重算一遍 —— 否则真实签名被改坏时判据照样通过（判据与被测对象脱节，
+  -- 实测踩过：去掉 content-type 参与签名，探针重算版本仍绿）。
+  -- 发出去的头：签名头 + Authorization（host 由 HTTP 栈生成，不手填）
+  local out = {}
+  for _, k in ipairs(keys) do
+    if k ~= "host" then out[k] = h[k] end
+  end
+  out["Authorization"] = "SDK-HMAC-SHA256 Access=" .. ak
+    .. ",SignedHeaders=" .. signedHeaders .. ",Signature=" .. signature
+  -- 签名后追加（不参与 canonical）
+  out["Agent-Type"] = "PromptCenter"
+  out["X-Language"] = "zh-cn"
+  return { url = url, method = method:upper(), headers = out, body = payload,
+           canonical = canonical, string_to_sign = stringToSign,
+           signed_headers = signedHeaders }
+end
+
+-- codeartsAccountInfo(cred)：账号信息（statistics/plugin），判断是否积分账户。
+local function codeartsAccountInfo(cred)
+  local req, err = codeartsSignedRequest("GET", CODEARTS_SNAP .. "/snap-manager/v1/statistics/plugin", cred, nil)
+  if not req then return nil, err end
+  local resp, herr = __llmsproxy_http(req)
+  if herr or not resp or resp.status ~= 200 then
+    return nil, "账户信息查询失败: " .. tostring(herr or (resp and resp.status))
+  end
+  local ok, rec = pcall(json.decode, resp.body or "")
+  if not ok or type(rec) ~= "table" then return nil, "账户信息响应无法解析" end
+  local d = rec.data or rec
+  local metrics = d.metrics or {}
+  local total = nil
+  for _, m in ipairs(metrics) do
+    -- IDE 从 usageTotalPackageCredit 读总额（参考 codearts-credits.ts 注释）
+    if type(m) == "table" and m.name == "usageTotalPackageCredit" then
+      total = tonumber(m.value) or tonumber(m.credit) or total
+    end
+  end
+  local billing = d.billingMode or d.billing_mode or d.chargingMode or ""
+  return {
+    isCreditPackage = tostring(billing):upper():find("CREDIT") ~= nil,
+    isTokenPackage = tostring(billing):upper():find("TOKEN") ~= nil,
+    total = total,
+    raw = d,
+  }, nil
+end
+
+-- codeartsClaim(plat, tok, args)：完整领取流程（照参考的 6 步判定顺序）。
+-- 返回 (requestSpec, nil) 给通用发送路径，或 (nil, err) 提前失败。
+-- 注意：参考的流程要发**多个**请求（账户→活动→claim→confirm），而 claim_daily
+-- 的契约只发一个。故这里把整段流程跑完并直接落结果，返回一个「不发送」的哨兵，
+-- 由 claim_daily 识别 —— 见 CLAIM_DONE 约定。
+local function codeartsClaim(plat, tok, args)
+  local cred = (args and args.credential) or nil
+  if type(cred) ~= "table" then return nil, "缺少凭据对象（AK/SK 需要结构化字段）" end
+
+  -- ① 账户类型：非积分账户 → inactive（Token 账户不该被报成"领取失败"）
+  local info, ierr = codeartsAccountInfo(cred)
+  if not info then return nil, ierr end
+  if not info.isCreditPackage then
+    return { done = true, kind = "inactive",
+             message = info.isTokenPackage and "Token 计费账户，不在积分活动范围"
+               or "非积分计费账户，不在积分活动范围" }
+  end
+
+  -- ② 活动列表
+  local areq = codeartsSignedRequest("GET",
+    CODEARTS_SNAP .. "/v1/ops/delivery?channel=IDE", cred, nil)
+  if not areq then return nil, "活动列表请求构造失败" end
+  local aresp, aerr = __llmsproxy_http(areq)
+  if aerr or not aresp or aresp.status ~= 200 then
+    return { done = true, kind = "failed",
+             message = "活动列表查询失败: " .. tostring(aerr or (aresp and aresp.status)) }
+  end
+  local aok, arec = pcall(json.decode, aresp.body or "")
+  local items = aok and type(arec) == "table" and ((arec.data or {}).items) or nil
+  if type(items) ~= "table" then
+    return { done = true, kind = "failed", message = "活动列表响应缺少 items" }
+  end
+  local act = nil
+  for _, it in ipairs(items) do
+    if type(it) == "table" and (it.type or "") == "USER_LOGIN" then act = it break end
+  end
+  if not act then
+    return { done = true, kind = "inactive", message = "未找到每日签到活动" }
+  end
+
+  -- ③ 幂等保护：本协议没有幂等键，预检不可省
+  if act.claimable ~= true then
+    local st = tostring(act.status or "")
+    -- 已领取态（参考 CLAIMED_STATUSES）
+    local claimed = st == "CLAIMED" or st == "RECEIVED" or st == "COMPLETED"
+    return { done = true, kind = claimed and "already-claimed" or "inactive",
+             message = claimed and "今天已领取" or ("当前不可领取（status=" .. st .. "）") }
+  end
+  local campaignId = act.campaignId or act.campaign_id or ""
+  if campaignId == "" then
+    return { done = true, kind = "failed", message = "活动缺少 campaignId，无法领取" }
+  end
+
+  -- ④ claim
+  local body = json.encode({ campaignId = campaignId, channel = "IDE" })
+  local creq = codeartsSignedRequest("POST", CODEARTS_SNAP .. "/v1/ops/claim", cred, body)
+  if not creq then return nil, "claim 请求构造失败" end
+  local cresp, cerr = __llmsproxy_http(creq)
+  if cerr or not cresp or cresp.status ~= 200 then
+    return { done = true, kind = "failed",
+             message = "领取失败: " .. tostring(cerr or (cresp and cresp.status)) }
+  end
+
+  -- ⑤ 服务端要求确认时补 confirm（判据 benefit.id 非空）；confirm 失败不算整体失败
+  local msg = "已领取"
+  local cok, crec = pcall(json.decode, cresp.body or "")
+  local benefit = cok and type(crec) == "table" and (((crec.data or {}).benefit) or nil) or nil
+  if type(benefit) == "table" and benefit.id then
+    local fbody = json.encode({ id = benefit.id, channel = "IDE" })
+    local freq = codeartsSignedRequest("POST", CODEARTS_SNAP .. "/v1/ops/confirm", cred, fbody)
+    if freq then
+      local fresp, ferr = __llmsproxy_http(freq)
+      -- 只在真正失败时降级提示，不改变整体成败（积分已在待确认态）
+      if ferr or not fresp or fresp.status ~= 200 then
+        msg = "已领取（确认步骤失败，可能停在待确认）"
      end
    end
  end
+  return { done = true, kind = "success", message = msg }
+end
+
+-- 绑定 codearts 的领取钩子。它自己跑完 4 步流程（账户→活动→claim→confirm），
+-- 用 done 哨兵返回，claim_daily 识别后不再发送单个请求。
+do
+  for _, p in ipairs(PLATFORMS) do
+    if p.id == "codearts" then
+      p.claim_fn = function(plat, tok, args) return codeartsClaim(plat, tok, args) end
+      break
+    end
+  end
+end
+

 -- 申请的额外出站主机：从平台声明推导（登录域 + 上游域），避免两份清单漂移。
 -- 内核里**不含**任何厂商名 —— 这些只存在于本插件，且需运维在设置页逐个批准。
@ -3735,6 +3896,19 @@ function plugin.claim_daily(req)
    if custom then spec = custom end
  end

+  -- done 哨兵：平台自己跑完了多步流程（如 codearts 的 账户→活动→claim→confirm），
+  -- 不再由通用路径发送单个请求。
+  if type(spec) == "table" and spec.done then
+    local acct0 = acctEntry or plugin.state.accounts[plat.id] or {}
+    acct0.last_claim = os.time and os.time() or 0
+    acct0.last_claim_status = spec.kind == "success" and 200 or 0
+    acct0.last_claim_summary = spec.message
+    if acctEntry then poolAdd(plat.id, acctEntry) else plugin.state.accounts[plat.id] = acct0 end
+    logEvent("领取结束 " .. plat.id .. ": " .. tostring(spec.kind))
+    return { status = 200, json = { ok = spec.kind == "success",
+      outcome = { kind = spec.kind, message = spec.message } } }
+  end
+
  local resp, err = __llmsproxy_http(spec)
  if err then
    logEvent("领取失败 " .. plat.id .. ": " .. err)
@ -5350,9 +5524,24 @@ do
  end
 end

-- plugin.__trae_derive_probe 只给测试做差分用（拿参考实现生成的期望值比对）。
-- 不挂 HTTP 路由、不暴露给 UI；它必须在派生函数**定义之后**才存在，
-- 因为它们都是 local，插件的 plugin 表又建得早。
+-- plugin.__codearts_sign_probe：只给测试做差分（与参考生成的期望值比对）。
+-- 允许传入 date 以对齐参考的固定时间戳。
+function plugin.__codearts_sign_probe(args)
+  args = args or {}
+  local date = tostring(args.date or "")
+  local saved = codeartsDateStamp
+  if date ~= "" then codeartsDateStamp = function() return date end end
+  local req, err = codeartsSignedRequest(tostring(args.method or "GET"), tostring(args.url or ""),
+    { access_key_id = tostring(args.ak or ""), secret_access_key = tostring(args.sk or ""),
+      security_token = tostring(args.st or "") }, tostring(args.body or ""))
+  codeartsDateStamp = saved
+  if not req then return { json = { error = err } } end
+  -- 直接用真实函数算出的中间值（不是重算）—— 否则判据与实现脱节。
+  return { json = { canonical = req.canonical, string_to_sign = req.string_to_sign,
+                    signature = hmac_sha256_hex(tostring(args.sk or ""), req.string_to_sign),
+                    signed_headers = req.signed_headers,
+                    authorization = req.headers["Authorization"] } }
+end
 function plugin.__trae_derive_probe(args)
  local uid = tostring((type(args) == "table" and args.uid) or "")
  return { json = { devid = traeDeriveDeviceId15(uid),
--- a/tools/codearts_sig_expected.mjs
+++ b/tools/codearts_sig_expected.mjs
@ -0,0 +1,113 @@
+// 生成 CodeArts 华为云签名派生的差分期望值（供 internal/core/codearts_sign_test.go 比对）。
+//
+// 为什么需要：channels.lua 里的华为云 SDK-HMAC-SHA256 签名是**手工移植**
+// （Lua 没有 webcrypto）。签名错一处，服务端只回一句
+// `{"error_code":"APIG.0301","error_msg":"...verify ak sk signature fail"}`，
+// 看起来像"账号/权限问题"，极难定位。所以拿参考实现生成期望值做逐字节差分。
+//
+// 参考真值：vendor/channel-pack/src/sign.ts 的 signRequestHuawei。
+// 这里**逐行照抄**那个函数（而非 import）—— 它依赖参考仓库的构建链，
+// 抄这 40 行更能保证"同一算法"。
+//
+// 用法（改了参考或改了移植后都要重跑）：
+//   node tools/codearts_sig_expected.mjs > internal/core/codearts_sig_expected.json
+
+import { createHash, createHmac } from 'node:crypto'
+
+const sha256Hex = (d) => createHash('sha256').update(d).digest('hex')
+const hmacSha256Hex = (key, data) => createHmac('sha256', key).update(data).digest('hex')
+
+/** 照抄 sign.ts:signRequestHuawei（dateStamp 提为参数以便固定时间）。 */
+function signRequestHuawei(ak, sk, securityToken, method, urlStr, body, dateStamp) {
+  const url = new URL(urlStr)
+  let uri = url.pathname
+  if (!uri.endsWith('/')) uri += '/'
+  const query = url.search.slice(1)
+  const payloadHash = sha256Hex(body)
+
+  const headers = new Map()
+  headers.set('host', url.host)
+  headers.set('x-sdk-date', dateStamp)
+  headers.set('x-sdk-content-sha256', payloadHash)
+  headers.set('x-security-token', securityToken)
+  if (method.toUpperCase() !== 'GET') headers.set('content-type', 'application/json')
+
+  const signedHeaders = []
+  headers.forEach((_, k) => signedHeaders.push(k))
+  signedHeaders.sort()
+  const headerLines = signedHeaders.map((k) => `${k}:${headers.get(k) ?? ''}`)
+  const canonical = [
+    method,
+    uri,
+    query,
+    headerLines.join('\n'),
+    '',
+    signedHeaders.join(';'),
+    payloadHash,
+  ].join('\n')
+  const stringToSign = `SDK-HMAC-SHA256\n${dateStamp}\n${sha256Hex(new TextEncoder().encode(canonical))}`
+  const signature = hmacSha256Hex(
+    new TextEncoder().encode(sk),
+    new TextEncoder().encode(stringToSign),
+  )
+  return {
+    canonical,
+    stringToSign,
+    signature,
+    signedHeaders: signedHeaders.join(';'),
+  }
+}
+
+// 覆盖三条真实路径（账户查询 / 活动列表带 query / 领取带 body），
+// 以及有/无 security_token 两种形态。
+const cases = [
+  {
+    m: 'GET',
+    u: 'https://snap-access.cn-north-4.myhuaweicloud.com/snap-manager/v1/statistics/plugin',
+    b: '',
+    ak: 'AK1',
+    sk: 'SK1',
+    st: 'TOK1',
+  },
+  {
+    m: 'GET',
+    u: 'https://snap-access.cn-north-4.myhuaweicloud.com/v1/ops/delivery?channel=IDE',
+    b: '',
+    ak: 'AK2',
+    sk: 'SK2',
+    st: '',
+  },
+  {
+    m: 'POST',
+    u: 'https://snap-access.cn-north-4.myhuaweicloud.com/v1/ops/claim',
+    b: '{"campaignId":"C1","channel":"IDE"}',
+    ak: 'AK3',
+    sk: 'SK3',
+    st: 'T3',
+  },
+]
+
+const out = cases.map((c) => {
+  const r = signRequestHuawei(
+    c.ak,
+    c.sk,
+    c.st,
+    c.m,
+    c.u,
+    Buffer.from(c.b, 'utf8'),
+    '20261013T150405Z',
+  )
+  return {
+    method: c.m,
+    url: c.u,
+    body: c.b,
+    ak: c.ak,
+    sk: c.sk,
+    st: c.st,
+    canonical: r.canonical,
+    string_to_sign: r.stringToSign,
+    signature: r.signature,
+    signed_headers: r.signedHeaders,
+  }
+})
+process.stdout.write(`${JSON.stringify(out, null, 1)}\n`)