fix(im): remove unsupported feed group shortcuts

Remove the feed group list/query shortcut registration, implementation, tests, and skill references so the im domain no longer exposes unsupported feed group commands. Keep the remaining im flag validation paths on typed error envelopes.
fix(im): report feed group failures as typed errors
2026-07-03 22:24:31 +08:00 · 2026-06-06 18:07:49 +08:00 · 2026-06-06 17:31:20 +08:00
520 changed files with 7908 additions and 81701 deletions
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,30 +0,0 @@
-/internal/ @liangshuo-1
-
-# Last match wins: existing domains below are exempt, only new skills/ entries need review.
-/skills/ @liangshuo-1
-/skills/lark-approval/
-/skills/lark-apps/
-/skills/lark-attendance/
-/skills/lark-base/
-/skills/lark-calendar/
-/skills/lark-contact/
-/skills/lark-doc/
-/skills/lark-drive/
-/skills/lark-event/
-/skills/lark-im/
-/skills/lark-mail/
-/skills/lark-markdown/
-/skills/lark-minutes/
-/skills/lark-okr/
-/skills/lark-openapi-explorer/
-/skills/lark-shared/
-/skills/lark-sheets/
-/skills/lark-skill-maker/
-/skills/lark-slides/
-/skills/lark-task/
-/skills/lark-vc/
-/skills/lark-vc-agent/
-/skills/lark-whiteboard/
-/skills/lark-wiki/
-/skills/lark-workflow-meeting-summary/
-/skills/lark-workflow-standup-report/
--- a/.gitignore
+++ b/.gitignore
@@ -35,8 +35,6 @@ tests/mail/reports/
 # Generated / test artifacts
 .hammer/
 .lark-slides/
-/notes/
-/minutes/
 internal/registry/meta_data.json
 cmd/api/download.bin
 app.log
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -73,20 +73,20 @@ linters:
          - forbidigo
      # errs-typed-only enforced on paths already migrated to errs.NewXxxError.
      # Add a path when its migration is complete.
-      - path-except: (internal/auth/|internal/errcompat/|internal/errclass/|internal/client/|internal/cmdutil/factory\.go|cmd/auth/|cmd/config/|cmd/service/|shortcuts/common/mcp_client\.go|shortcuts/apps/|shortcuts/base/|shortcuts/calendar/|shortcuts/contact/|shortcuts/doc/|shortcuts/drive/|shortcuts/im/|shortcuts/mail/|shortcuts/markdown/|shortcuts/minutes/|shortcuts/okr/|shortcuts/sheets/|shortcuts/slides/|shortcuts/task/|shortcuts/vc/|shortcuts/whiteboard/|shortcuts/wiki/|internal/event/consume/|cmd/event/|events/|shortcuts/event/)
+      - path-except: (internal/auth/|internal/errcompat/|internal/errclass/|internal/client/|internal/cmdutil/factory\.go|cmd/auth/|cmd/config/|cmd/service/|shortcuts/common/mcp_client\.go|shortcuts/base/|shortcuts/calendar/|shortcuts/drive/|shortcuts/mail/|shortcuts/okr/|shortcuts/task/|shortcuts/whiteboard/|shortcuts/im/)
        text: errs-typed-only
        linters:
          - forbidigo
      # errs-no-bare-wrap enforced on paths fully migrated to typed final
      # errors. Scoped separately from errs-typed-only because cmd/auth/,
      # cmd/config/ still have residual fmt.Errorf and must not be caught.
-      - path-except: (shortcuts/apps/|shortcuts/base/|shortcuts/calendar/|shortcuts/contact/|shortcuts/doc/|shortcuts/drive/|shortcuts/im/|shortcuts/mail/|shortcuts/markdown/|shortcuts/minutes/|shortcuts/okr/|shortcuts/sheets/|shortcuts/slides/|shortcuts/task/|shortcuts/vc/|shortcuts/whiteboard/|shortcuts/wiki/|shortcuts/common/mcp_client\.go|cmd/event/|events/|shortcuts/event/)
+      - path-except: (shortcuts/base/|shortcuts/calendar/|shortcuts/drive/|shortcuts/mail/|shortcuts/okr/|shortcuts/task/|shortcuts/whiteboard/|shortcuts/im/|shortcuts/common/mcp_client\.go)
        text: errs-no-bare-wrap
        linters:
          - forbidigo
      # errs-no-legacy-helper enforced on domains whose shared validation/save
      # helpers have migrated to typed final errors.
-      - path-except: (shortcuts/apps/|shortcuts/base/|shortcuts/calendar/|shortcuts/contact/|shortcuts/doc/|shortcuts/drive/|shortcuts/im/|shortcuts/mail/|shortcuts/markdown/|shortcuts/minutes/|shortcuts/okr/|shortcuts/sheets/|shortcuts/slides/|shortcuts/task/|shortcuts/vc/|shortcuts/whiteboard/|shortcuts/wiki/|cmd/event/|events/|shortcuts/event/)
+      - path-except: (shortcuts/base/|shortcuts/calendar/|shortcuts/drive/|shortcuts/mail/|shortcuts/okr/|shortcuts/task/|shortcuts/whiteboard/|shortcuts/im/)
        text: errs-no-legacy-helper
        linters:
          - forbidigo
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@@ -17,7 +17,6 @@ builds:
    goarch:
      - amd64
      - arm64
-      - riscv64

 archives:
  - name_template: "lark-cli-{{ .Version }}-{{ .Os }}-{{ .Arch }}"
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -11,7 +11,7 @@

 ```bash
 make build          # Build (runs fetch_meta first)
-make unit-test      # Required before PR (runs with -race where supported, e.g. amd64/arm64)
+make unit-test      # Required before PR (runs with -race)
 make test           # Full: vet + unit + integration
 ```

@@ -75,31 +75,7 @@ The one rule to internalize: **every error message you write will be parsed by a

 ### Structured errors in commands

-Command-facing failures must be typed `errs.*` errors — never the legacy `output.Err*` helpers and never a final bare `fmt.Errorf`. AI agents parse the stderr envelope's `type` / `subtype` / `param` / `hint` fields to decide their next action; the full taxonomy lives in `errs/ERROR_CONTRACT.md`.
-
-Picking a constructor:
-
-| Failure | Constructor |
-|---------|-------------|
-| User flag/arg fails validation | `errs.NewValidationError(errs.SubtypeInvalidArgument, ...).WithParam("--flag")` |
-| Valid request, wrong system state | `errs.NewValidationError(errs.SubtypeFailedPrecondition, ...).WithHint(...)` |
-| Lark API returned `code != 0` | `runtime.CallAPITyped` (shortcuts) / `errclass.BuildAPIError` (raw responses) — never hand-build |
-| Network / transport failure | `errs.NewNetworkError(errs.SubtypeNetworkTransport, ...)` |
-| Local file I/O failure | `errs.NewInternalError(errs.SubtypeFileIO, ...)` — validate the path first (`validate.SafeInputPath` / `SafeOutputPath`) and use `vfs.*` |
-| Unclassified lower-layer error as final | `errs.NewInternalError(errs.SubtypeUnknown, ...).WithCause(err)` |
-| Lower layer already returned a typed error | pass it through unchanged — re-wrapping downgrades its classification |
-
-Signatures that are easy to guess wrong:
-
- `runtime.CallAPITyped(method, url string, params map[string]interface{}, data interface{}) (map[string]interface{}, error)` — it performs the HTTP request itself and classifies `code != 0` into a typed error; just return the error it gives you.
- Typed pass-through check: `if _, ok := errs.ProblemOf(err); ok { return err }` — `ProblemOf` returns `(*errs.Problem, bool)`, not a nilable pointer.
- `.WithParam` exists only on `*errs.ValidationError`. `InternalError` / `NetworkError` have no param field — file or endpoint context goes in the message or `.WithHint(...)`.
-
-`forbidigo` + `lint/errscontract` reject the legacy `output.Err*` helpers, bare final `fmt.Errorf` / `errors.New`, and legacy envelope literals on migrated paths. Beyond what lint catches, three authoring conventions apply:
-
- Preserve the underlying error with `.WithCause(err)` so `errors.Is` / `errors.Unwrap` keep working.
- `param` names only the user input that actually failed. Recovery guidance goes in `.WithHint(...)`; machine-readable recovery fields (`missing_scopes`, `log_id`) carry server/system ground truth only — never caller-side guesses.
- Error-path tests assert typed metadata via `errs.ProblemOf` (`category` / `subtype` / `param`) and cause preservation, not message substrings alone.
+`RunE` functions must return `output.Errorf` / `output.ErrWithHint` — never bare `fmt.Errorf`. AI agents parse stderr as JSON; bare errors break this contract.

 ### stdout is data, stderr is everything else

--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,129 +2,6 @@

 All notable changes to this project will be documented in this file.

-## [v1.0.53] - 2026-06-12
-
-### Features
-
- **auth**: Revoke user tokens server-side on `auth logout` (#1434)
- **auth**: Add `--json` flag support to auth subcommands (#1431)
- **token**: Mint TAT via unified OAuth v3 Token Endpoint (#1408)
- **note**: Split note into a dedicated domain with `+detail` and `+transcript` flows (#1345, #1417, #1435)
- **im**: Unify sort flags into `--sort` field and `--order` direction (#1302)
-
-### Bug Fixes
-
- **apps**: Read release error_logs from `data.error_logs` in `+release-get` (#1436)
-
-### Documentation
-
- **skills**: Optimize whiteboard skill (#1371)
- **skills**: Optimize okr skill (#1368)
-
-## [v1.0.52] - 2026-06-11
-
-### Features
-
- **events**: Per-resource subscription identity + Match hook (#1185)
- **apps**: Emit typed error envelopes across the apps domain (#1288)
- **wiki**: Emit typed error envelopes across the wiki domain (#1350)
- **im**: Add `--chat-modes` filter to chat search (#1317)
- **apps**: Exclude `.git` directory from `+html-publish` package (#1396)
- **build**: Support riscv64 prebuilt binaries in release and install pipeline
-
-### Bug Fixes
-
- **apps**: Support git credential dry-run (#1390)
- **whiteboard**: Fix parsing empty whiteboard content (#1391)
- **build**: Make `-race` flag arch-conditional to support riscv64
-
-### Documentation
-
- **im**: Document `chat.user_setting` batch_query/batch_update (#1339)
- **im**: Document `chat.managers` and `chat.moderation` API resources (#1294)
- **skills**: Optimize lark-drive skill routing (#1284)
- **skills**: Expand cite user guidance and fix typos (#1394)
-
-## [v1.0.51] - 2026-06-10
-
-### Features
-
- **apps**: Support multi dev modes (#1175)
- **im**: Complete audio/post rendering and add opt-in `--download-resources` (#1245)
- **base**: Configure initial base table schema (#1377)
- **vc**: Add recording event support (#1369)
- **minutes**: Replace words for transcript (#1372)
- **markdown**: Emit typed error envelopes across the markdown domain (#1347)
- **sheets**: Emit typed error envelopes across the sheets domain (#1348)
- **slides**: Emit typed error envelopes across the slides domain (#1349)
-
-### Documentation
-
- **skills**: Warn about `@file` absolute path restriction in lark-doc skills (#1375)
- **skills**: Remove unsupported ⚠️ from callout emoji list (#1374)
-
-## [v1.0.50] - 2026-06-09
-
-### Features
-
- **doc**: Emit typed error envelopes across the doc domain (#1346)
- **event**: Emit typed error envelopes across the event domain (#1289)
- **contact**: Emit typed error envelopes across the contact domain (#1287)
- **sheets**: Guard `+csv-put --csv` against a path passed without `@` (#1337)
- **cli**: Adjust agent timeout hint output conditions (#1328)
-
-### Bug Fixes
-
- **drive**: Add `@file`/stdin support to `+add-comment --content` (#1343)
- **slides**: Build create URL locally instead of drive metas call (#1329)
- **cli**: Clarify `--block-id` supports comma-separated batch delete in help text (#1336)
-
-### Documentation
-
- **doc**: Replace append with `block_insert_after` in skeleton workflow guidance (#1340)
- **doc**: Document `<folder-manager>` resource block (#1168)
- **drive**: Add drive comment location guidance (#1258)
-
-## [v1.0.49] - 2026-06-08
-
-### Features
-
- **events**: Add whiteboard event domain with per-board subscription (#1265)
- **im**: Support feed group (#1102)
- **im**: Add feed shortcut create, list, and remove shortcuts (#1273)
- **im**: Format feed group error handling (#1308)
- **im**: Return typed error envelopes across the im domain (#1230)
- **base**: Emit typed error envelopes across the base domain (#1248)
- **calendar**: Emit typed error envelopes across the calendar domain (#1232)
- **task**: Emit typed error envelopes across the task domain (#1231)
- **okr,whiteboard**: Emit typed error envelopes across both domains (#1236)
- **minutes,vc**: Emit typed error envelopes across both domains (#1234)
- **markdown**: Harden create upload failures (#1325)
- **drive**: Harden inspect shortcut failures (#1324)
- **slides**: Add IconPark lookup for Lark slides (#1123)
- **doc**: Remove docs v1 API (#1291)
- **cli**: Add `skills` command to read embedded skill content (#1318)
- **cli**: Fetch official skills index (#1301)
- **shared**: Document relative-path-only file arguments (#1319)
- **scopes**: Clear `recommend.allow` scope auto-approve overrides (#1272)
- **shortcuts**: Check shortcut example commands against the live CLI tree (#1244)
-
-### Bug Fixes
-
- **events**: Keep bounded event consume runs alive after stdin EOF (#1285)
- **drive**: Use docs secure label read scope (#1281)
-
-### Documentation
-
- **approval**: Restructure skill with intent table and scope boundaries (#1307)
- **skills**: Tighten drive and markdown guardrails (#1326)
- **skills**: Optimize calendar, vc, and minutes skill guidance (#1269)
- **markdown**: Add markdown domain template (#1293)
- **markdown**: Improve lark-markdown skill guidance (#1279)
- **doc**: Improve lark-doc skill guidance (#1283)
- **wiki**: Optimize skill guidance and routing boundaries (#1275)
- **slides**: Tighten routing/boundary and reconcile in-slide whiteboard (#1169)
-
 ## [v1.0.48] - 2026-06-04

 ### Features
@@ -1149,11 +1026,6 @@ Bundled AI agent skills for intelligent assistance:
 - Bilingual documentation (English & Chinese).
 - CI/CD pipelines: linting, testing, coverage reporting, and automated releases.

-[v1.0.53]: https://github.com/larksuite/cli/releases/tag/v1.0.53
-[v1.0.52]: https://github.com/larksuite/cli/releases/tag/v1.0.52
-[v1.0.51]: https://github.com/larksuite/cli/releases/tag/v1.0.51
-[v1.0.50]: https://github.com/larksuite/cli/releases/tag/v1.0.50
-[v1.0.49]: https://github.com/larksuite/cli/releases/tag/v1.0.49
 [v1.0.48]: https://github.com/larksuite/cli/releases/tag/v1.0.48
 [v1.0.47]: https://github.com/larksuite/cli/releases/tag/v1.0.47
 [v1.0.46]: https://github.com/larksuite/cli/releases/tag/v1.0.46
--- a/9
+++ b/9
@@ -8,13 +8,6 @@ DATE     := $(shell date +%Y-%m-%d)
 LDFLAGS  := -s -w -X $(MODULE)/internal/build.Version=$(VERSION) -X $(MODULE)/internal/build.Date=$(DATE)
 PREFIX   ?= /usr/local

-# The repository's Go 1.23 CI toolchain does not support -race on riscv64.
-# Prefer GOARCH passed to make (for example, `make GOARCH=riscv64 unit-test`)
-# over `go env GOARCH`, because command-line make variables are not visible to
-# $(shell ...).
-TEST_GOARCH := $(or $(GOARCH),$(shell go env GOARCH))
-RACE_FLAG := $(if $(filter riscv64,$(TEST_GOARCH)),,-race)
-
 .PHONY: all build vet fmt-check test unit-test integration-test examples-build install uninstall clean fetch_meta gitleaks

 all: test
@@ -41,7 +34,7 @@ fmt-check:

 # ./extension/... keeps the public plugin SDK in the default test matrix.
 unit-test: fetch_meta
-	go test $(RACE_FLAG) -gcflags="all=-N -l" -count=1 \
+	go test -race -gcflags="all=-N -l" -count=1 \
 		./cmd/... ./internal/... ./shortcuts/... ./extension/...

 # examples-build keeps the shipped plugin-SDK examples compilable. If this
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ The official [Lark/Feishu](https://www.larksuite.com/) CLI tool, maintained by t
 | ✍️ Approval   | Query approval tasks, approve/reject/transfer tasks, cancel and CC instances                                                      |
 | 🎯 OKR        | Query, create, update OKRs; manage objective & key results, alignments, indicators and progress.                                  |
 | 📋 Project    | Meegle — manage work items, schedules, and data via the standalone [meegle-cli](https://github.com/larksuite/meegle-cli) (install separately) |
-| 🔗 Apps       | Create Spark/Miaoda apps, publish HTML/static sites, run cloud generation, and manage access scope                                 |
+| 🔗 Apps       | Develop, deploy HTML, web pages and applications                                                                                  |

 ## Installation & Quick Start

--- a/README.zh.md
+++ b/README.zh.md
@@ -41,7 +41,7 @@
 | ✍️ 审批     | 查询审批任务、同意/拒绝/转交审批任务、撤回与抄送审批实例              |
 | 🎯 OKR  | 查询、创建、更新 OKR，管理目标、关键结果、对齐、指标和进展记录        |
 | 📋 飞书项目 | 管理工作项、排期与数据 — 由独立的 [meegle-cli](https://github.com/larksuite/meegle-cli) 提供（需单独安装） |
-| 🔗 应用     | 创建妙搭（Spark/Miaoda）应用、发布 HTML/静态站点、云端生成迭代、管理可用范围                                                                                                   |
+| 🔗 应用     | 开发、部署 HTML、Web 页面和应用                                                                                                          |

 ## 安装与快速开始

--- a/cmd/auth/auth_test.go
+++ b/cmd/auth/auth_test.go
@@ -91,29 +91,6 @@ func TestAuthCheckCmd_FlagParsing(t *testing.T) {
 	}
 }

-func TestAuthCheckCmd_AcceptsJSONFlag(t *testing.T) {
-	f, _, _, _ := cmdutil.TestFactory(t, &core.CliConfig{
-		AppID: "test-app", AppSecret: "test-secret", Brand: core.BrandFeishu,
-	})
-
-	var gotOpts *CheckOptions
-	cmd := NewCmdAuthCheck(f, func(opts *CheckOptions) error {
-		gotOpts = opts
-		return nil
-	})
-	cmd.SetArgs([]string{"--scope", "calendar:calendar:read", "--json"})
-	err := cmd.Execute()
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if gotOpts == nil {
-		t.Fatal("expected opts to be set")
-	}
-	if !gotOpts.JSON {
-		t.Error("expected JSON=true")
-	}
-}
-
 func TestAuthLogoutCmd_FlagParsing(t *testing.T) {
 	f, _, _, _ := cmdutil.TestFactory(t, nil)

@@ -132,27 +109,6 @@ func TestAuthLogoutCmd_FlagParsing(t *testing.T) {
 	}
 }

-func TestAuthLogoutCmd_AcceptsJSONFlag(t *testing.T) {
-	f, _, _, _ := cmdutil.TestFactory(t, nil)
-
-	var gotOpts *LogoutOptions
-	cmd := NewCmdAuthLogout(f, func(opts *LogoutOptions) error {
-		gotOpts = opts
-		return nil
-	})
-	cmd.SetArgs([]string{"--json"})
-	err := cmd.Execute()
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if gotOpts == nil {
-		t.Fatal("expected opts to be set")
-	}
-	if !gotOpts.JSON {
-		t.Error("expected JSON=true")
-	}
-}
-
 func TestAuthListCmd_FlagParsing(t *testing.T) {
 	f, _, _, _ := cmdutil.TestFactory(t, nil)

@@ -170,27 +126,6 @@ func TestAuthListCmd_FlagParsing(t *testing.T) {
 	}
 }

-func TestAuthListCmd_AcceptsJSONFlag(t *testing.T) {
-	f, _, _, _ := cmdutil.TestFactory(t, nil)
-
-	var gotOpts *ListOptions
-	cmd := NewCmdAuthList(f, func(opts *ListOptions) error {
-		gotOpts = opts
-		return nil
-	})
-	cmd.SetArgs([]string{"--json"})
-	err := cmd.Execute()
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if gotOpts == nil {
-		t.Error("expected opts to be set")
-	}
-	if !gotOpts.JSON {
-		t.Error("expected JSON=true")
-	}
-}
-
 func TestAuthStatusCmd_FlagParsing(t *testing.T) {
 	f, _, _, _ := cmdutil.TestFactory(t, &core.CliConfig{
 		AppID: "test-app", AppSecret: "test-secret", Brand: core.BrandFeishu,
@@ -210,29 +145,6 @@ func TestAuthStatusCmd_FlagParsing(t *testing.T) {
 	}
 }

-func TestAuthStatusCmd_AcceptsJSONFlag(t *testing.T) {
-	f, _, _, _ := cmdutil.TestFactory(t, &core.CliConfig{
-		AppID: "test-app", AppSecret: "test-secret", Brand: core.BrandFeishu,
-	})
-
-	var gotOpts *StatusOptions
-	cmd := NewCmdAuthStatus(f, func(opts *StatusOptions) error {
-		gotOpts = opts
-		return nil
-	})
-	cmd.SetArgs([]string{"--json"})
-	err := cmd.Execute()
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if gotOpts == nil {
-		t.Error("expected opts to be set")
-	}
-	if !gotOpts.JSON {
-		t.Error("expected JSON=true")
-	}
-}
-
 func TestAuthStatusCmd_VerifyFlag(t *testing.T) {
 	f, _, _, _ := cmdutil.TestFactory(t, &core.CliConfig{
 		AppID: "test-app", AppSecret: "test-secret", Brand: core.BrandFeishu,
@@ -355,32 +267,6 @@ func TestAuthScopesCmd_FlagParsing(t *testing.T) {
 	}
 }

-func TestAuthScopesCmd_JSONFlagForcesJSONFormat(t *testing.T) {
-	f, _, _, _ := cmdutil.TestFactory(t, &core.CliConfig{
-		AppID: "test-app", AppSecret: "test-secret", Brand: core.BrandFeishu,
-	})
-
-	var gotOpts *ScopesOptions
-	cmd := NewCmdAuthScopes(f, func(opts *ScopesOptions) error {
-		gotOpts = opts
-		return nil
-	})
-	cmd.SetArgs([]string{"--format", "pretty", "--json"})
-	err := cmd.Execute()
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if gotOpts == nil {
-		t.Fatal("expected opts to be set")
-	}
-	if !gotOpts.JSON {
-		t.Error("expected JSON=true")
-	}
-	if gotOpts.Format != "json" {
-		t.Errorf("expected format json, got %s", gotOpts.Format)
-	}
-}
-
 func TestAuthScopesRun_UsesTenantAccessTokenFromCredentialProvider(t *testing.T) {
 	f, _, _, reg := cmdutil.TestFactory(t, &core.CliConfig{
 		AppID: "test-app", AppSecret: "", Brand: core.BrandFeishu,
--- a/cmd/auth/check.go
+++ b/cmd/auth/check.go
@@ -19,7 +19,6 @@ import (
 type CheckOptions struct {
 	Factory *cmdutil.Factory
 	Scope   string
-	JSON    bool
 }

 // NewCmdAuthCheck creates the auth check subcommand.
@@ -38,7 +37,6 @@ func NewCmdAuthCheck(f *cmdutil.Factory, runF func(*CheckOptions) error) *cobra.
 	}

 	cmd.Flags().StringVar(&opts.Scope, "scope", "", "scopes to check (space-separated)")
-	cmd.Flags().BoolVar(&opts.JSON, "json", false, "structured JSON output")
 	cmd.MarkFlagRequired("scope")
 	cmdutil.SetRisk(cmd, "read")

--- a/cmd/auth/list.go
+++ b/cmd/auth/list.go
@@ -18,7 +18,6 @@ import (
 // ListOptions holds all inputs for auth list.
 type ListOptions struct {
 	Factory *cmdutil.Factory
-	JSON    bool
 }

 // NewCmdAuthList creates the auth list subcommand.
@@ -35,7 +34,6 @@ func NewCmdAuthList(f *cmdutil.Factory, runF func(*ListOptions) error) *cobra.Co
 			return authListRun(opts)
 		},
 	}
-	cmd.Flags().BoolVar(&opts.JSON, "json", false, "structured JSON output")
 	cmdutil.SetRisk(cmd, "read")

 	return cmd
@@ -46,14 +44,6 @@ func authListRun(opts *ListOptions) error {

 	multi, _ := core.LoadMultiAppConfig()
 	if multi == nil || len(multi.Apps) == 0 {
-		if opts.JSON {
-			output.PrintJson(f.IOStreams.Out, map[string]interface{}{
-				"ok":     true,
-				"users":  []map[string]interface{}{},
-				"reason": "not_configured",
-			})
-			return nil
-		}
 		// auth list is a read-only probe; the "configured but no users"
 		// branch below already returns exit 0 with a stderr hint, so we
 		// keep the same contract here. We still want the hint to be
@@ -71,14 +61,6 @@ func authListRun(opts *ListOptions) error {

 	app := multi.CurrentAppConfig(f.Invocation.Profile)
 	if app == nil || len(app.Users) == 0 {
-		if opts.JSON {
-			output.PrintJson(f.IOStreams.Out, map[string]interface{}{
-				"ok":     true,
-				"users":  []map[string]interface{}{},
-				"reason": "not_logged_in",
-			})
-			return nil
-		}
 		fmt.Fprintln(f.IOStreams.ErrOut, "No logged-in users. Run `lark-cli auth login` to log in.")
 		return nil
 	}
--- a/cmd/auth/list_test.go
+++ b/cmd/auth/list_test.go
@@ -4,7 +4,6 @@
 package auth

 import (
-	"encoding/json"
 	"strings"
 	"testing"

@@ -35,33 +34,6 @@ func TestAuthListRun_NotConfigured_ReturnsExitZero(t *testing.T) {
 	}
 }

-func TestAuthListRun_JSONMode_NotConfigured_WritesStdoutOnly(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authListRun(&ListOptions{Factory: f, JSON: true}); err != nil {
-		t.Fatalf("auth list should succeed when not configured (exit 0); got: %v", err)
-	}
-
-	var payload map[string]any
-	if err := json.Unmarshal(stdout.Bytes(), &payload); err != nil {
-		t.Fatalf("stdout must be valid JSON: %v\nstdout=%s", err, stdout.String())
-	}
-	if payload["ok"] != true {
-		t.Errorf("stdout.ok = %v, want true", payload["ok"])
-	}
-	users, ok := payload["users"].([]any)
-	if !ok || len(users) != 0 {
-		t.Errorf("stdout.users = %v, want empty array", payload["users"])
-	}
-	if payload["reason"] != "not_configured" {
-		t.Errorf("stdout.reason = %v, want not_configured", payload["reason"])
-	}
-	if stderr.Len() != 0 {
-		t.Errorf("stderr must stay empty in JSON mode, got:\n%s", stderr.String())
-	}
-}
-
 // TestAuthListRun_NotConfigured_AgentWorkspace_RoutesToBindHelp covers the
 // reason this hint exists workspace-aware in the first place: an AI agent
 // in OpenClaw / Hermes that probes auth list before binding gets routed to
@@ -85,48 +57,3 @@ func TestAuthListRun_NotConfigured_AgentWorkspace_RoutesToBindHelp(t *testing.T)
 		t.Errorf("agent hint must not mention config init: %s", out)
 	}
 }
-
-func TestAuthListRun_JSONMode_NoLoggedInUsers_WritesStdoutOnly(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-	writeLogoutConfig(t, nil)
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authListRun(&ListOptions{Factory: f, JSON: true}); err != nil {
-		t.Fatalf("auth list should succeed when no users exist (exit 0); got: %v", err)
-	}
-
-	var payload map[string]any
-	if err := json.Unmarshal(stdout.Bytes(), &payload); err != nil {
-		t.Fatalf("stdout must be valid JSON: %v\nstdout=%s", err, stdout.String())
-	}
-	if payload["ok"] != true {
-		t.Errorf("stdout.ok = %v, want true", payload["ok"])
-	}
-	users, ok := payload["users"].([]any)
-	if !ok || len(users) != 0 {
-		t.Errorf("stdout.users = %v, want empty array", payload["users"])
-	}
-	if payload["reason"] != "not_logged_in" {
-		t.Errorf("stdout.reason = %v, want not_logged_in", payload["reason"])
-	}
-	if stderr.Len() != 0 {
-		t.Errorf("stderr must stay empty in JSON mode, got:\n%s", stderr.String())
-	}
-}
-
-func TestAuthListRun_DefaultMode_NoLoggedInUsers_KeepsTextOutput(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-	writeLogoutConfig(t, nil)
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authListRun(&ListOptions{Factory: f}); err != nil {
-		t.Fatalf("auth list should succeed when no users exist (exit 0); got: %v", err)
-	}
-
-	if stdout.Len() != 0 {
-		t.Errorf("stdout must stay empty in default mode, got:\n%s", stdout.String())
-	}
-	if !strings.Contains(stderr.String(), "No logged-in users") {
-		t.Errorf("stderr = %q, want no-users hint", stderr.String())
-	}
-}
--- a/cmd/auth/login.go
+++ b/cmd/auth/login.go
@@ -296,11 +296,10 @@ func authLoginRun(opts *LoginOptions) error {
 	}

 	// Step 2: Show user code and verification URL.
-	// JSON mode embeds AgentTimeoutHint as a structured field so agents that
-	// capture stdout into a JSON parser see it without stream-mixing surprises.
-	// Text mode prints the hint to stderr only when running under a non-TTY
-	// (i.e. piped / agent harness), since humans reading a terminal don't need
-	// the agent-oriented instructions.
+	// Both branches surface AgentTimeoutHint, but on different channels:
+	// JSON mode embeds it as a structured field (so an agent that captures
+	// stdout into a JSON parser sees it without stream-mixing surprises),
+	// text mode prints to stderr (alongside the URL prompt).
 	if opts.JSON {
 		data := map[string]interface{}{
 			"event":                     "device_authorization",
@@ -318,9 +317,7 @@ func authLoginRun(opts *LoginOptions) error {
 	} else {
 		fmt.Fprintf(f.IOStreams.ErrOut, msg.OpenURL)
 		fmt.Fprintf(f.IOStreams.ErrOut, "  %s\n\n", authResp.VerificationUriComplete)
-		if f.IOStreams != nil && !f.IOStreams.IsTerminal {
-			fmt.Fprintln(f.IOStreams.ErrOut, msg.AgentTimeoutHint)
-		}
+		fmt.Fprintln(f.IOStreams.ErrOut, msg.AgentTimeoutHint)
 	}

 	// Step 3: Poll for token
@@ -407,11 +404,10 @@ func authLoginPollDeviceCode(opts *LoginOptions, config *core.CliConfig, msg *lo
 			fmt.Fprintf(f.IOStreams.ErrOut, "[lark-cli] [WARN] auth login: failed to remove cached requested scopes: %v\n", err)
 		}
 	}
-	// Skip the stderr hint in JSON mode (the --no-wait call that issued
-	// the device_code already surfaced it as a JSON field), and also skip it
-	// when running on an interactive terminal — the agent-oriented
-	// instructions only matter for piped / harness environments.
-	if !opts.JSON && f.IOStreams != nil && !f.IOStreams.IsTerminal {
+	// Skip the stderr hint in JSON mode — the --no-wait call that issued the
+	// device_code already returned the hint as a JSON field, and writing
+	// text to stderr would pollute consumers that combine streams via 2>&1.
+	if !opts.JSON {
 		fmt.Fprintln(f.IOStreams.ErrOut, msg.AgentTimeoutHint)
 	}
 	log(msg.WaitingAuth)
--- a/cmd/auth/login_messages.go
+++ b/cmd/auth/login_messages.go
@@ -128,5 +128,5 @@ func getLoginMsg(lang i18n.Lang) *loginMsg {
 // (not backed by from_meta service specs). Descriptions are now centralized in
 // service_descriptions.json.
 func getShortcutOnlyDomainNames() []string {
-	return []string{"base", "contact", "docs", "markdown", "apps", "note"}
+	return []string{"base", "contact", "docs", "markdown", "apps"}
 }
--- a/cmd/auth/login_test.go
+++ b/cmd/auth/login_test.go
@@ -9,7 +9,6 @@ import (
 	"errors"
 	"io"
 	"net/http"
-	"slices"
 	"sort"
 	"strings"
 	"testing"
@@ -215,12 +214,6 @@ func TestGetShortcutOnlyDomainNames_HaveDescriptions(t *testing.T) {
 	}
 }

-func TestGetShortcutOnlyDomainNames_IncludesNote(t *testing.T) {
-	if !slices.Contains(getShortcutOnlyDomainNames(), "note") {
-		t.Fatal("shortcut-only domains must include note so auth login can select vc:note:read")
-	}
-}
-
 func TestCollectScopesForDomains(t *testing.T) {
 	projects := registry.ListFromMetaProjects()
 	if len(projects) == 0 {
--- a/cmd/auth/logout.go
+++ b/cmd/auth/logout.go
@@ -18,7 +18,6 @@ import (
 // LogoutOptions holds all inputs for auth logout.
 type LogoutOptions struct {
 	Factory *cmdutil.Factory
-	JSON    bool
 }

 // NewCmdAuthLogout creates the auth logout subcommand.
@@ -35,7 +34,6 @@ func NewCmdAuthLogout(f *cmdutil.Factory, runF func(*LogoutOptions) error) *cobr
 			return authLogoutRun(opts)
 		},
 	}
-	cmd.Flags().BoolVar(&opts.JSON, "json", false, "structured JSON output")
 	cmdutil.SetRisk(cmd, "write")

 	return cmd
@@ -46,65 +44,25 @@ func authLogoutRun(opts *LogoutOptions) error {

 	multi, _ := core.LoadMultiAppConfig()
 	if multi == nil || len(multi.Apps) == 0 {
-		if opts.JSON {
-			output.PrintJson(f.IOStreams.Out, map[string]interface{}{
-				"ok":        true,
-				"loggedOut": false,
-				"reason":    "not_configured",
-			})
-			return nil
-		}
 		fmt.Fprintln(f.IOStreams.ErrOut, "No configuration found.")
 		return nil
 	}

 	app := multi.CurrentAppConfig(f.Invocation.Profile)
 	if app == nil || len(app.Users) == 0 {
-		if opts.JSON {
-			output.PrintJson(f.IOStreams.Out, map[string]interface{}{
-				"ok":        true,
-				"loggedOut": false,
-				"reason":    "not_logged_in",
-			})
-			return nil
-		}
 		fmt.Fprintln(f.IOStreams.ErrOut, "Not logged in.")
 		return nil
 	}

-	httpClient, httpErr := f.HttpClient()
-	appSecret, secretErr := core.ResolveSecretInput(app.AppSecret, f.Keychain)
-
 	for _, user := range app.Users {
-		if httpErr == nil && secretErr == nil {
-			if token := larkauth.GetStoredToken(app.AppId, user.UserOpenId); token != nil {
-				revokeToken := token.RefreshToken
-				tokenTypeHint := "refresh_token"
-				if revokeToken == "" {
-					revokeToken = token.AccessToken
-					tokenTypeHint = "access_token"
-				}
-				if revokeToken != "" {
-					_ = larkauth.RevokeToken(httpClient, app.AppId, appSecret, app.Brand, revokeToken, tokenTypeHint)
-				}
-			}
-		}
 		if err := larkauth.RemoveStoredToken(app.AppId, user.UserOpenId); err != nil {
 			fmt.Fprintf(f.IOStreams.ErrOut, "Warning: failed to remove token for %s: %v\n", user.UserOpenId, err)
 		}
 	}
-
 	app.Users = []core.AppUser{}
 	if err := core.SaveMultiAppConfig(multi); err != nil {
 		return errs.NewInternalError(errs.SubtypeStorage, "failed to save config: %v", err).WithCause(err)
 	}
-	if opts.JSON {
-		output.PrintJson(f.IOStreams.Out, map[string]interface{}{
-			"ok":        true,
-			"loggedOut": true,
-		})
-		return nil
-	}
 	output.PrintSuccess(f.IOStreams.ErrOut, "Logged out")
 	return nil
 }
--- a/cmd/auth/logout_test.go
+++ b/cmd/auth/logout_test.go
@@ -1,356 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package auth
-
-import (
-	"encoding/json"
-	"net/url"
-	"strings"
-	"testing"
-
-	larkauth "github.com/larksuite/cli/internal/auth"
-	"github.com/larksuite/cli/internal/cmdutil"
-	"github.com/larksuite/cli/internal/core"
-	"github.com/larksuite/cli/internal/httpmock"
-	"github.com/zalando/go-keyring"
-)
-
-func writeLogoutConfig(t *testing.T, users []core.AppUser) {
-	t.Helper()
-	if err := core.SaveMultiAppConfig(&core.MultiAppConfig{
-		CurrentApp: "test-app",
-		Apps: []core.AppConfig{
-			{
-				AppId:     "test-app",
-				AppSecret: core.PlainSecret("test-secret"),
-				Brand:     core.BrandFeishu,
-				Users:     users,
-			},
-		},
-	}); err != nil {
-		t.Fatalf("SaveMultiAppConfig() error = %v", err)
-	}
-}
-
-func TestAuthLogoutRun_JSONMode_NotConfigured_WritesStdoutOnly(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authLogoutRun(&LogoutOptions{Factory: f, JSON: true}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	var payload map[string]any
-	if err := json.Unmarshal(stdout.Bytes(), &payload); err != nil {
-		t.Fatalf("stdout must be valid JSON: %v\nstdout=%s", err, stdout.String())
-	}
-	if payload["ok"] != true {
-		t.Errorf("stdout.ok = %v, want true", payload["ok"])
-	}
-	if payload["loggedOut"] != false {
-		t.Errorf("stdout.loggedOut = %v, want false", payload["loggedOut"])
-	}
-	if payload["reason"] != "not_configured" {
-		t.Errorf("stdout.reason = %v, want not_configured", payload["reason"])
-	}
-	if stderr.Len() != 0 {
-		t.Errorf("stderr must stay empty in JSON mode, got:\n%s", stderr.String())
-	}
-}
-
-func TestAuthLogoutRun_JSONMode_NotLoggedIn_WritesStdoutOnly(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-	writeLogoutConfig(t, nil)
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authLogoutRun(&LogoutOptions{Factory: f, JSON: true}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	var payload map[string]any
-	if err := json.Unmarshal(stdout.Bytes(), &payload); err != nil {
-		t.Fatalf("stdout must be valid JSON: %v\nstdout=%s", err, stdout.String())
-	}
-	if payload["ok"] != true {
-		t.Errorf("stdout.ok = %v, want true", payload["ok"])
-	}
-	if payload["loggedOut"] != false {
-		t.Errorf("stdout.loggedOut = %v, want false", payload["loggedOut"])
-	}
-	if payload["reason"] != "not_logged_in" {
-		t.Errorf("stdout.reason = %v, want not_logged_in", payload["reason"])
-	}
-	if stderr.Len() != 0 {
-		t.Errorf("stderr must stay empty in JSON mode, got:\n%s", stderr.String())
-	}
-}
-
-func TestAuthLogoutRun_JSONMode_Success_WritesStdoutOnly(t *testing.T) {
-	keyring.MockInit()
-	t.Setenv("HOME", t.TempDir())
-	t.Setenv("LARKSUITE_CLI_DATA_DIR", t.TempDir())
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-	writeLogoutConfig(t, []core.AppUser{{UserOpenId: "ou_user", UserName: "tester"}})
-	if err := larkauth.SetStoredToken(&larkauth.StoredUAToken{
-		AppId:      "test-app",
-		UserOpenId: "ou_user",
-	}); err != nil {
-		t.Fatalf("SetStoredToken() error = %v", err)
-	}
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authLogoutRun(&LogoutOptions{Factory: f, JSON: true}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	var payload map[string]any
-	if err := json.Unmarshal(stdout.Bytes(), &payload); err != nil {
-		t.Fatalf("stdout must be valid JSON: %v\nstdout=%s", err, stdout.String())
-	}
-	if payload["ok"] != true {
-		t.Errorf("stdout.ok = %v, want true", payload["ok"])
-	}
-	if payload["loggedOut"] != true {
-		t.Errorf("stdout.loggedOut = %v, want true", payload["loggedOut"])
-	}
-	if _, hasReason := payload["reason"]; hasReason {
-		t.Errorf("stdout.reason must be absent on success, got %v", payload["reason"])
-	}
-	if stderr.Len() != 0 {
-		t.Errorf("stderr must stay empty in JSON mode, got:\n%s", stderr.String())
-	}
-}
-
-func TestAuthLogoutRun_DefaultMode_KeepsTextOutput(t *testing.T) {
-	keyring.MockInit()
-	t.Setenv("HOME", t.TempDir())
-	t.Setenv("LARKSUITE_CLI_DATA_DIR", t.TempDir())
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-	writeLogoutConfig(t, []core.AppUser{{UserOpenId: "ou_user", UserName: "tester"}})
-	if err := larkauth.SetStoredToken(&larkauth.StoredUAToken{
-		AppId:      "test-app",
-		UserOpenId: "ou_user",
-	}); err != nil {
-		t.Fatalf("SetStoredToken() error = %v", err)
-	}
-
-	f, stdout, stderr, _ := cmdutil.TestFactory(t, nil)
-	if err := authLogoutRun(&LogoutOptions{Factory: f}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	if stdout.Len() != 0 {
-		t.Errorf("stdout must stay empty in default mode, got:\n%s", stdout.String())
-	}
-	if !strings.Contains(stderr.String(), "Logged out") {
-		t.Errorf("stderr = %q, want success text", stderr.String())
-	}
-}
-
-func TestAuthLogoutRun_RevokesTokenAndClearsLocalState(t *testing.T) {
-	keyring.MockInit()
-	setupLoginConfigDir(t)
-	t.Setenv("HOME", t.TempDir())
-
-	multi := &core.MultiAppConfig{
-		CurrentApp: "default",
-		Apps: []core.AppConfig{
-			{
-				Name:      "default",
-				AppId:     "cli_test",
-				AppSecret: core.PlainSecret("secret"),
-				Brand:     core.BrandFeishu,
-				Users:     []core.AppUser{{UserOpenId: "ou_user", UserName: "tester"}},
-			},
-		},
-	}
-	if err := core.SaveMultiAppConfig(multi); err != nil {
-		t.Fatalf("SaveMultiAppConfig() error = %v", err)
-	}
-	if err := larkauth.SetStoredToken(&larkauth.StoredUAToken{
-		AppId:        "cli_test",
-		UserOpenId:   "ou_user",
-		AccessToken:  "user-access-token",
-		RefreshToken: "user-refresh-token",
-	}); err != nil {
-		t.Fatalf("SetStoredToken() error = %v", err)
-	}
-
-	f, _, stderr, reg := cmdutil.TestFactory(t, &core.CliConfig{
-		ProfileName: "default",
-		AppID:       "cli_test",
-		AppSecret:   "secret",
-		Brand:       core.BrandFeishu,
-	})
-
-	reg.Register(&httpmock.Stub{
-		Method: "POST",
-		URL:    larkauth.PathOAuthRevoke,
-		Body:   map[string]interface{}{"code": 0},
-		BodyFilter: func(body []byte) bool {
-			values, err := url.ParseQuery(string(body))
-			if err != nil {
-				return false
-			}
-			return values.Get("client_id") == "cli_test" &&
-				values.Get("client_secret") == "secret" &&
-				values.Get("token") == "user-refresh-token" &&
-				values.Get("token_type_hint") == "refresh_token"
-		},
-	})
-
-	if err := authLogoutRun(&LogoutOptions{Factory: f}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	if got := stderr.String(); !strings.Contains(got, "Logged out") {
-		t.Fatalf("stderr = %q, want Logged out", got)
-	}
-	if got := larkauth.GetStoredToken("cli_test", "ou_user"); got != nil {
-		t.Fatalf("expected stored token removed, got %#v", got)
-	}
-	saved, err := core.LoadMultiAppConfig()
-	if err != nil {
-		t.Fatalf("LoadMultiAppConfig() error = %v", err)
-	}
-	if len(saved.Apps) != 1 || len(saved.Apps[0].Users) != 0 {
-		t.Fatalf("expected users cleared, got %#v", saved.Apps)
-	}
-}
-
-func TestAuthLogoutRun_FallsBackToAccessTokenWhenRefreshTokenMissing(t *testing.T) {
-	keyring.MockInit()
-	setupLoginConfigDir(t)
-	t.Setenv("HOME", t.TempDir())
-
-	multi := &core.MultiAppConfig{
-		CurrentApp: "default",
-		Apps: []core.AppConfig{
-			{
-				Name:      "default",
-				AppId:     "cli_test",
-				AppSecret: core.PlainSecret("secret"),
-				Brand:     core.BrandFeishu,
-				Users:     []core.AppUser{{UserOpenId: "ou_user", UserName: "tester"}},
-			},
-		},
-	}
-	if err := core.SaveMultiAppConfig(multi); err != nil {
-		t.Fatalf("SaveMultiAppConfig() error = %v", err)
-	}
-	if err := larkauth.SetStoredToken(&larkauth.StoredUAToken{
-		AppId:       "cli_test",
-		UserOpenId:  "ou_user",
-		AccessToken: "user-access-token",
-	}); err != nil {
-		t.Fatalf("SetStoredToken() error = %v", err)
-	}
-
-	f, _, stderr, reg := cmdutil.TestFactory(t, &core.CliConfig{
-		ProfileName: "default",
-		AppID:       "cli_test",
-		AppSecret:   "secret",
-		Brand:       core.BrandFeishu,
-	})
-
-	reg.Register(&httpmock.Stub{
-		Method: "POST",
-		URL:    larkauth.PathOAuthRevoke,
-		Body:   map[string]interface{}{"code": 0},
-		BodyFilter: func(body []byte) bool {
-			values, err := url.ParseQuery(string(body))
-			if err != nil {
-				return false
-			}
-			return values.Get("client_id") == "cli_test" &&
-				values.Get("client_secret") == "secret" &&
-				values.Get("token") == "user-access-token" &&
-				values.Get("token_type_hint") == "access_token"
-		},
-	})
-
-	if err := authLogoutRun(&LogoutOptions{Factory: f}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	if got := stderr.String(); !strings.Contains(got, "Logged out") {
-		t.Fatalf("stderr = %q, want Logged out", got)
-	}
-	if got := larkauth.GetStoredToken("cli_test", "ou_user"); got != nil {
-		t.Fatalf("expected stored token removed, got %#v", got)
-	}
-	saved, err := core.LoadMultiAppConfig()
-	if err != nil {
-		t.Fatalf("LoadMultiAppConfig() error = %v", err)
-	}
-	if len(saved.Apps) != 1 || len(saved.Apps[0].Users) != 0 {
-		t.Fatalf("expected users cleared, got %#v", saved.Apps)
-	}
-}
-
-func TestAuthLogoutRun_RevokeFailureStillClearsLocalState(t *testing.T) {
-	keyring.MockInit()
-	setupLoginConfigDir(t)
-	t.Setenv("HOME", t.TempDir())
-
-	multi := &core.MultiAppConfig{
-		CurrentApp: "default",
-		Apps: []core.AppConfig{
-			{
-				Name:      "default",
-				AppId:     "cli_test",
-				AppSecret: core.PlainSecret("secret"),
-				Brand:     core.BrandFeishu,
-				Users:     []core.AppUser{{UserOpenId: "ou_user", UserName: "tester"}},
-			},
-		},
-	}
-	if err := core.SaveMultiAppConfig(multi); err != nil {
-		t.Fatalf("SaveMultiAppConfig() error = %v", err)
-	}
-	if err := larkauth.SetStoredToken(&larkauth.StoredUAToken{
-		AppId:        "cli_test",
-		UserOpenId:   "ou_user",
-		AccessToken:  "user-access-token",
-		RefreshToken: "user-refresh-token",
-	}); err != nil {
-		t.Fatalf("SetStoredToken() error = %v", err)
-	}
-
-	f, _, stderr, reg := cmdutil.TestFactory(t, &core.CliConfig{
-		ProfileName: "default",
-		AppID:       "cli_test",
-		AppSecret:   "secret",
-		Brand:       core.BrandFeishu,
-	})
-
-	reg.Register(&httpmock.Stub{
-		Method: "POST",
-		URL:    larkauth.PathOAuthRevoke,
-		Status: 500,
-		Body:   map[string]interface{}{"error": "server_error"},
-	})
-
-	if err := authLogoutRun(&LogoutOptions{Factory: f}); err != nil {
-		t.Fatalf("authLogoutRun() error = %v", err)
-	}
-
-	gotErr := stderr.String()
-	if strings.Contains(gotErr, "failed to revoke token for ou_user") {
-		t.Fatalf("stderr = %q, want no revoke warning", gotErr)
-	}
-	if !strings.Contains(gotErr, "Logged out") {
-		t.Fatalf("stderr = %q, want Logged out", gotErr)
-	}
-	if got := larkauth.GetStoredToken("cli_test", "ou_user"); got != nil {
-		t.Fatalf("expected stored token removed, got %#v", got)
-	}
-	saved, err := core.LoadMultiAppConfig()
-	if err != nil {
-		t.Fatalf("LoadMultiAppConfig() error = %v", err)
-	}
-	if len(saved.Apps) != 1 || len(saved.Apps[0].Users) != 0 {
-		t.Fatalf("expected users cleared, got %#v", saved.Apps)
-	}
-}
--- a/cmd/auth/scopes.go
+++ b/cmd/auth/scopes.go
@@ -19,7 +19,6 @@ type ScopesOptions struct {
 	Factory *cmdutil.Factory
 	Ctx     context.Context
 	Format  string
-	JSON    bool
 }

 // NewCmdAuthScopes creates the auth scopes subcommand.
@@ -31,9 +30,6 @@ func NewCmdAuthScopes(f *cmdutil.Factory, runF func(*ScopesOptions) error) *cobr
 		Short: "Query scopes enabled for the app",
 		RunE: func(cmd *cobra.Command, args []string) error {
 			opts.Ctx = cmd.Context()
-			if opts.JSON {
-				opts.Format = "json"
-			}
 			if runF != nil {
 				return runF(opts)
 			}
@@ -42,7 +38,6 @@ func NewCmdAuthScopes(f *cmdutil.Factory, runF func(*ScopesOptions) error) *cobr
 	}

 	cmd.Flags().StringVar(&opts.Format, "format", "json", "output format: json (default) | pretty")
-	cmd.Flags().BoolVar(&opts.JSON, "json", false, "structured JSON output")
 	cmdutil.SetRisk(cmd, "read")

 	return cmd
--- a/cmd/auth/status.go
+++ b/cmd/auth/status.go
@@ -17,7 +17,6 @@ import (
 type StatusOptions struct {
 	Factory *cmdutil.Factory
 	Verify  bool
-	JSON    bool
 }

 // NewCmdAuthStatus creates the auth status subcommand.
@@ -36,7 +35,6 @@ func NewCmdAuthStatus(f *cmdutil.Factory, runF func(*StatusOptions) error) *cobr
 	}

 	cmd.Flags().BoolVar(&opts.Verify, "verify", false, "verify token against server (requires network)")
-	cmd.Flags().BoolVar(&opts.JSON, "json", false, "structured JSON output")
 	cmdutil.SetRisk(cmd, "read")

 	return cmd
--- a/cmd/build.go
+++ b/cmd/build.go
@@ -6,7 +6,6 @@ package cmd
 import (
 	"context"
 	"io"
-	"io/fs"

 	"github.com/larksuite/cli/cmd/api"
 	"github.com/larksuite/cli/cmd/auth"
@@ -17,7 +16,6 @@ import (
 	"github.com/larksuite/cli/cmd/profile"
 	"github.com/larksuite/cli/cmd/schema"
 	"github.com/larksuite/cli/cmd/service"
-	"github.com/larksuite/cli/cmd/skill"
 	cmdupdate "github.com/larksuite/cli/cmd/update"
 	_ "github.com/larksuite/cli/events"
 	"github.com/larksuite/cli/internal/build"
@@ -53,18 +51,6 @@ func WithKeychain(kc keychain.KeychainAccess) BuildOption {
 	}
 }

-// embeddedSkillContent is the skill tree wired into cmdutil.Factory.SkillContent
-// at build time. It is registered by the repo-root package main's init via
-// SetEmbeddedSkillContent — it cannot be threaded through main.go without
-// breaking the single-file preview build (see skills_embed.go). nil in builds
-// that embed no skills; the `skills` commands then return a typed internal error.
-var embeddedSkillContent fs.FS
-
-// SetEmbeddedSkillContent registers the embedded skill tree. Called from the
-// repo-root package main's init; a wrapper main can call it before Execute to
-// supply its own skill content.
-func SetEmbeddedSkillContent(fsys fs.FS) { embeddedSkillContent = fsys }
-
 // HideProfile sets the visibility policy for the root-level --profile flag.
 // When hide is true the flag stays registered (so existing invocations still
 // parse) but is omitted from help and shell completion. Typically called as
@@ -117,7 +103,6 @@ func buildInternal(ctx context.Context, inv cmdutil.InvocationContext, opts ...B
 	if cfg.keychain != nil {
 		f.Keychain = cfg.keychain
 	}
-	f.SkillContent = embeddedSkillContent
 	rootCmd := &cobra.Command{
 		Use:     "lark-cli",
 		Short:   "Lark/Feishu CLI — OAuth authorization, UAT management, API calls",
@@ -155,7 +140,6 @@ func buildInternal(ctx context.Context, inv cmdutil.InvocationContext, opts ...B
 	rootCmd.AddCommand(completion.NewCmdCompletion(f))
 	rootCmd.AddCommand(cmdupdate.NewCmdUpdate(f))
 	rootCmd.AddCommand(cmdevent.NewCmdEvents(f))
-	rootCmd.AddCommand(skill.NewCmdSkill(f))
 	service.RegisterServiceCommandsWithContext(ctx, rootCmd, f)
 	shortcuts.RegisterShortcutsWithContext(ctx, rootCmd, f)

--- a/cmd/config/init_probe.go
+++ b/cmd/config/init_probe.go
@@ -33,16 +33,15 @@ const probeTimeout = 3 * time.Second
 //
 //  1. A TAT request using the just-saved credentials. credential.FetchTAT
 //     returns a typed errs.* error (via the shared classifyTATResponseCode)
-//     only when the unified Token Endpoint deterministically rejected the
-//     credentials — an OAuth2 invalid_client / unauthorized_client classified as
-//     CategoryConfig / SubtypeInvalidClient, or whatever codemeta maps. That
-//     typed error is propagated so the root dispatcher renders the canonical
-//     envelope and `config init` exits non-zero — identical to how every other
-//     token-resolving command reports the same bad credentials. Ambiguous
-//     failures (transport errors, transient 5xx/server_error, JSON parse errors,
-//     timeouts) come back as raw untyped errors and are swallowed (return nil),
-//     so valid configurations are never disturbed by upstream noise.
-//     errs.IsTyped is the discriminator.
+//     only when the server deterministically rejected the credentials — a
+//     non-zero TAT body code, classified as CategoryConfig / SubtypeInvalidClient
+//     (10003 / 10014) or whatever codemeta maps. That typed error is propagated
+//     so the root dispatcher renders the canonical envelope and `config init`
+//     exits non-zero — identical to how every other token-resolving command
+//     reports the same bad credentials. Ambiguous failures (transport errors,
+//     HTTP non-200, JSON parse errors, timeouts) come back as raw untyped
+//     errors and are swallowed (return nil), so valid configurations are never
+//     disturbed by upstream noise. errs.IsTyped is the discriminator.
 //
 //  2. If TAT succeeded, a POST to the probe endpoint is fired. The outcome of
 //     that call (success, server error, timeout, parse failure) is always
--- a/cmd/config/init_probe_test.go
+++ b/cmd/config/init_probe_test.go
@@ -31,10 +31,10 @@ type fakeRT struct {

 func (f *fakeRT) RoundTrip(req *http.Request) (*http.Response, error) {
 	switch {
-	case strings.HasSuffix(req.URL.Path, "/oauth/v3/token"):
+	case strings.HasSuffix(req.URL.Path, "/auth/v3/tenant_access_token/internal"):
 		f.tatCalls++
 		if f.tatHandler == nil {
-			return jsonResp(200, `{"code":0,"access_token":"t-ok","token_type":"Bearer"}`), nil
+			return jsonResp(200, `{"code":0,"tenant_access_token":"t-ok"}`), nil
 		}
 		return f.tatHandler(req)
 	case strings.HasSuffix(req.URL.Path, "/application/v6/larksuite_cli_app/probe"):
@@ -84,15 +84,14 @@ func fakeFactory(t *testing.T, rt http.RoundTripper) (*cmdutil.Factory, *bytes.B
 }

 // assertConfigRejection asserts runProbe propagated a deterministic credential
-// rejection: a *errs.ConfigError (CategoryConfig / SubtypeInvalidClient). This
-// is the same typed error every other token-resolving command returns for the
-// same bad credentials, and nothing is written to stderr (the root dispatcher
-// renders the envelope). The numeric code is not asserted: the unified v3 Token
-// Endpoint reports invalid_client via the OAuth2 error string, not a Lark code.
-func assertConfigRejection(t *testing.T, err error, errBuf *bytes.Buffer) {
+// rejection: a *errs.ConfigError (CategoryConfig / SubtypeInvalidClient) with
+// the expected upstream code. This is the same typed error every other
+// token-resolving command returns for the same bad credentials, and nothing is
+// written to stderr (the root dispatcher renders the envelope).
+func assertConfigRejection(t *testing.T, err error, errBuf *bytes.Buffer, wantCode int) {
 	t.Helper()
 	if err == nil {
-		t.Fatal("expected *errs.ConfigError, got nil")
+		t.Fatalf("expected *errs.ConfigError (code %d), got nil", wantCode)
 	}
 	var cfgErr *errs.ConfigError
 	if !errors.As(err, &cfgErr) {
@@ -104,6 +103,9 @@ func assertConfigRejection(t *testing.T, err error, errBuf *bytes.Buffer) {
 	if cfgErr.Subtype != errs.SubtypeInvalidClient {
 		t.Errorf("Subtype = %q, want %q", cfgErr.Subtype, errs.SubtypeInvalidClient)
 	}
+	if cfgErr.Code != wantCode {
+		t.Errorf("Code = %d, want %d", cfgErr.Code, wantCode)
+	}
 	if errBuf.Len() != 0 {
 		t.Errorf("runProbe must not write to stderr, got: %q", errBuf.String())
 	}
@@ -121,13 +123,11 @@ func assertSilent(t *testing.T, err error, errBuf *bytes.Buffer) {
 	}
 }

-// invalid_client (bad / non-existent app_id or wrong secret) → the v3 Token
-// Endpoint returns HTTP 400 with the OAuth2 error → ConfigError/InvalidClient,
-// propagated. The probe endpoint must not be called when TAT fails.
-func TestRunProbe_TATInvalidClient_ReturnsConfigError(t *testing.T) {
+// 10003 (bad / non-existent app_id) → ConfigError/InvalidClient, propagated.
+func TestRunProbe_TATCode10003_ReturnsConfigError(t *testing.T) {
 	rt := &fakeRT{
 		tatHandler: func(req *http.Request) (*http.Response, error) {
-			return jsonResp(400, `{"error":"invalid_client","error_description":"The client secret is invalid.","code":20002}`), nil
+			return jsonResp(200, `{"code":10003,"msg":"invalid param"}`), nil
 		},
 	}
 	f, errBuf := fakeFactory(t, rt)
@@ -137,27 +137,28 @@ func TestRunProbe_TATInvalidClient_ReturnsConfigError(t *testing.T) {
 	if rt.probeCalls != 0 {
 		t.Error("probe endpoint must not be called when TAT fails")
 	}
-	assertConfigRejection(t, err, errBuf)
+	assertConfigRejection(t, err, errBuf, 10003)
 }

-// unauthorized_client is treated as the same credential rejection, propagated.
-func TestRunProbe_TATUnauthorizedClient_ReturnsConfigError(t *testing.T) {
+// 10014 (real app_id + wrong secret) → ConfigError/InvalidClient via codemeta —
+// the most common real-world rejection, propagated.
+func TestRunProbe_TATCode10014_ReturnsConfigError(t *testing.T) {
 	rt := &fakeRT{
 		tatHandler: func(req *http.Request) (*http.Response, error) {
-			return jsonResp(401, `{"error":"unauthorized_client","error_description":"client not authorized"}`), nil
+			return jsonResp(200, `{"code":10014,"msg":"app secret invalid"}`), nil
 		},
 	}
 	f, errBuf := fakeFactory(t, rt)
-	assertConfigRejection(t, runProbe(context.Background(), f, "cli_x", "secret_y", core.BrandFeishu), errBuf)
+	assertConfigRejection(t, runProbe(context.Background(), f, "cli_x", "secret_y", core.BrandFeishu), errBuf, 10014)
 }

-// Any other deterministic client-side OAuth error (e.g. invalid_scope) falls
-// back to *errs.APIError via BuildAPIError — still typed, so the probe surfaces
-// it rather than swallowing — but is not a credential (ConfigError) rejection.
-func TestRunProbe_TATOtherClientError_Propagates(t *testing.T) {
+// Any non-zero body code is a deterministic rejection and propagates (typed).
+// An unrecognized code falls back to *errs.APIError via BuildAPIError — still
+// typed, so the probe still surfaces it rather than swallowing.
+func TestRunProbe_TATUnknownBodyCode_Propagates(t *testing.T) {
 	rt := &fakeRT{
 		tatHandler: func(req *http.Request) (*http.Response, error) {
-			return jsonResp(400, `{"code":20068,"error":"invalid_scope","error_description":"unauthorized scope"}`), nil
+			return jsonResp(200, `{"code":99999,"msg":"future-unknown"}`), nil
 		},
 	}
 	f, errBuf := fakeFactory(t, rt)
--- a/cmd/event/bus.go
+++ b/cmd/event/bus.go
@@ -12,7 +12,6 @@ import (

 	"github.com/spf13/cobra"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/cmdutil"
 	"github.com/larksuite/cli/internal/core"
 	"github.com/larksuite/cli/internal/event"
@@ -39,8 +38,7 @@ func NewCmdBus(f *cmdutil.Factory) *cobra.Command {

 			logger, err := bus.SetupBusLogger(eventsDir)
 			if err != nil {
-				return errs.NewInternalError(errs.SubtypeFileIO,
-					"set up bus logger: %s", err).WithCause(err)
+				return err
 			}

 			tr := transport.New()
@@ -60,14 +58,7 @@ func NewCmdBus(f *cmdutil.Factory) *cobra.Command {
 				}
 			}()

-			if err := b.Run(ctx); err != nil {
-				if _, ok := errs.ProblemOf(err); ok {
-					return err
-				}
-				return errs.NewInternalError(errs.SubtypeUnknown,
-					"event bus daemon exited: %s", err).WithCause(err)
-			}
-			return nil
+			return b.Run(ctx)
 		},
 	}

--- a/cmd/event/bus_test.go
+++ b/cmd/event/bus_test.go
@@ -1,45 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package event
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/cmdutil"
-	"github.com/larksuite/cli/internal/core"
-)
-
-// The hidden `event _bus` daemon command must exit with a typed file_io error
-// when its log directory cannot be created (the error is only visible in the
-// forked process's captured stderr / bus.log).
-func TestBusCommandLoggerSetupFailureIsTypedFileIO(t *testing.T) {
-	dir := t.TempDir()
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", dir)
-	// Block the events/ root with a regular file so MkdirAll fails.
-	if err := os.WriteFile(filepath.Join(dir, "events"), []byte("x"), 0600); err != nil {
-		t.Fatal(err)
-	}
-
-	f, _, _, _ := cmdutil.TestFactory(t, &core.CliConfig{
-		AppID: "cli_bus_test", AppSecret: "secret", Brand: core.BrandFeishu,
-	})
-	cmd := NewCmdBus(f)
-	cmd.SetArgs([]string{})
-
-	err := cmd.Execute()
-	if err == nil {
-		t.Fatal("expected logger setup error")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != errs.CategoryInternal || p.Subtype != errs.SubtypeFileIO {
-		t.Errorf("problem = %s/%s, want %s/%s", p.Category, p.Subtype,
-			errs.CategoryInternal, errs.SubtypeFileIO)
-	}
-}
--- a/cmd/event/consume.go
+++ b/cmd/event/consume.go
@@ -16,7 +16,6 @@ import (

 	"github.com/spf13/cobra"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/appmeta"
 	"github.com/larksuite/cli/internal/auth"
 	"github.com/larksuite/cli/internal/cmdutil"
@@ -65,8 +64,8 @@ Use 'event schema <EventKey>' for parameter details.`,
 	cmd.Flags().StringVar(&o.jqExpr, "jq", "", "JQ expression to filter output")
 	cmd.Flags().BoolVar(&o.quiet, "quiet", false, "Suppress informational messages on stderr")
 	cmd.Flags().StringVar(&o.outputDir, "output-dir", "", "Write each event as a file in this directory (relative paths only; absolute paths and ~ are rejected to prevent path traversal)")
-	cmd.Flags().IntVar(&o.maxEvents, "max-events", 0, "Exit after N successful emits (0 = unlimited). Multi-worker EventKeys may emit up to workers-1 past N before all workers stop. Bounded runs ignore stdin EOF.")
-	cmd.Flags().DurationVar(&o.timeout, "timeout", 0, "Exit after DURATION (e.g. 30s, 2m). 0 = no timeout. Timeout is a normal exit (code 0; stderr 'reason: timeout'). Bounded runs ignore stdin EOF.")
+	cmd.Flags().IntVar(&o.maxEvents, "max-events", 0, "Exit after N successful emits (0 = unlimited). Multi-worker EventKeys may emit up to workers-1 past N before all workers stop.")
+	cmd.Flags().DurationVar(&o.timeout, "timeout", 0, "Exit after DURATION (e.g. 30s, 2m). 0 = no timeout. Timeout is a normal exit (code 0; stderr 'reason: timeout').")
 	cmd.Flags().String("as", "auto", "identity type: user | bot | auto (must match EventKey's declared AuthTypes)")
 	_ = cmd.RegisterFlagCompletionFunc("as", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 		return []string{"user", "bot", "auto"}, cobra.ShellCompDirectiveNoFileComp
@@ -102,10 +101,11 @@ func runConsume(cmd *cobra.Command, f *cmdutil.Factory, eventKey string, o consu

 	if o.jqExpr != "" {
 		if err := output.ValidateJqExpression(o.jqExpr); err != nil {
-			return errs.NewValidationError(errs.SubtypeInvalidArgument, "%s", err).
-				WithParam("--jq").
-				WithCause(err).
-				WithHint("see `lark-cli event consume --help` EXAMPLES for common patterns, or `lark-cli event schema %s` for valid field paths", eventKey)
+			return output.ErrWithHint(
+				output.ExitValidation, "validation",
+				err.Error(),
+				fmt.Sprintf("see `lark-cli event consume --help` EXAMPLES for common patterns, or `lark-cli event schema %s` for valid field paths", eventKey),
+			)
 		}
 	}

@@ -184,9 +184,8 @@ func runConsume(cmd *cobra.Command, f *cmdutil.Factory, eventKey string, o consu
 		errOut = io.Discard
 	}

-	// Non-TTY unbounded consumers use stdin EOF as shutdown for subprocess callers.
-	// Bounded runs already have --max-events/--timeout as their lifecycle control.
-	if shouldWatchStdinEOF(f.IOStreams.IsTerminal, o.maxEvents, o.timeout) {
+	// Non-TTY only: stdin EOF is shutdown for subprocess callers; in TTY Ctrl-D must not exit.
+	if !f.IOStreams.IsTerminal {
 		watchStdinEOF(os.Stdin, cancel, errOut)
 	}

@@ -261,12 +260,12 @@ func preflightScopes(ctx context.Context, pf *preflightCtx) error {
 	if len(missing) == 0 {
 		return nil
 	}
-	return errs.NewPermissionError(errs.SubtypeMissingScope,
-		"missing required scopes for EventKey %s (as %s): %s",
-		pf.eventKey, pf.identity, strings.Join(missing, ", ")).
-		WithIdentity(string(pf.identity)).
-		WithMissingScopes(missing...).
-		WithHint("%s", scopeRemediationHint(pf.identity, missing, pf.appID, pf.brand))
+	return output.ErrWithHint(
+		output.ExitAuth, "auth",
+		fmt.Sprintf("missing required scopes for EventKey %s (as %s): %s",
+			pf.eventKey, pf.identity, strings.Join(missing, ", ")),
+		scopeRemediationHint(pf.identity, missing, pf.appID, pf.brand),
+	)
 }

 // scopeRemediationHint returns an identity-appropriate fix for missing scopes.
@@ -301,27 +300,23 @@ func preflightEventTypes(pf *preflightCtx) error {
 	if len(missing) == 0 {
 		return nil
 	}
-	return errs.NewValidationError(errs.SubtypeFailedPrecondition,
-		"EventKey %s requires event types not subscribed in console: %s",
-		pf.keyDef.Key, strings.Join(missing, ", ")).
-		WithHint("subscribe these events and publish a new app version at: %s",
-			consoleEventSubscriptionURL(pf.brand, pf.appID))
+	return output.ErrWithHint(
+		output.ExitValidation, "validation",
+		fmt.Sprintf("EventKey %s requires event types not subscribed in console: %s",
+			pf.keyDef.Key, strings.Join(missing, ", ")),
+		fmt.Sprintf("subscribe these events and publish a new app version at: %s",
+			consoleEventSubscriptionURL(pf.brand, pf.appID)),
+	)
 }

 // sanitizeOutputDir rejects absolute/parent-escaping paths and ~ (SafeOutputPath treats it as a literal dir name).
 func sanitizeOutputDir(dir string) (string, error) {
 	if strings.HasPrefix(dir, "~") {
-		return "", errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"%s; use a relative path like ./output instead", errOutputDirTilde).
-			WithParam("--output-dir").
-			WithCause(errOutputDirTilde)
+		return "", output.ErrValidation("%s; use a relative path like ./output instead", errOutputDirTilde)
 	}
 	safe, err := validate.SafeOutputPath(dir)
 	if err != nil {
-		return "", errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"%s %q: %s", errOutputDirUnsafe, dir, err).
-			WithParam("--output-dir").
-			WithCause(errOutputDirUnsafe)
+		return "", output.ErrValidation("%s %q: %s", errOutputDirUnsafe, dir, err)
 	}
 	return safe, nil
 }
@@ -333,21 +328,18 @@ func resolveTenantToken(ctx context.Context, f *cmdutil.Factory, appID string) (
 	}
 	result, err := f.Credential.ResolveToken(ctx, credential.NewTokenSpec(core.AsBot, appID))
 	if err != nil {
-		if _, ok := errs.ProblemOf(err); ok {
-			return "", err
-		}
-		return "", errs.NewAuthenticationError(errs.SubtypeTokenMissing,
-			"resolve tenant access token: %s", err).WithCause(err)
+		return "", output.ErrAuth("resolve tenant access token: %s", err)
 	}
 	if result == nil || result.Token == "" {
-		return "", errs.NewAuthenticationError(errs.SubtypeTokenMissing,
-			"no tenant access token available for app %s", appID).
-			WithHint("Check that app_secret is configured (lark-cli config show) and try 'lark-cli auth login'.")
+		return "", output.ErrWithHint(
+			output.ExitAuth, "auth",
+			fmt.Sprintf("no tenant access token available for app %s", appID),
+			"Check that app_secret is configured (lark-cli config show) and try 'lark-cli auth login'.",
+		)
 	}
 	return result.Token, nil
 }

-// Sentinels for errors.Is checks; call sites wrap them as typed ValidationError causes.
 var (
 	errInvalidParamFormat = errors.New("invalid --param format")
 	errOutputDirTilde     = errors.New("--output-dir does not support ~ expansion")
@@ -359,10 +351,7 @@ func parseParams(raw []string) (map[string]string, error) {
 	for _, kv := range raw {
 		k, v, ok := strings.Cut(kv, "=")
 		if !ok || k == "" {
-			return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
-				"%s %q: expected key=value", errInvalidParamFormat, kv).
-				WithParam("--param").
-				WithCause(errInvalidParamFormat)
+			return nil, output.ErrValidation("%s %q: expected key=value", errInvalidParamFormat, kv)
 		}
 		m[k] = v
 	}
@@ -381,8 +370,3 @@ func watchStdinEOF(r io.Reader, cancel context.CancelFunc, errOut io.Writer) {
 		cancel()
 	}()
 }
-
-// shouldWatchStdinEOF gates the stdin-EOF shutdown watcher: non-TTY unbounded runs only (<= 0 mirrors downstream's >0-is-bounded semantics, so negative bounds stay unbounded).
-func shouldWatchStdinEOF(isTerminal bool, maxEvents int, timeout time.Duration) bool {
-	return !isTerminal && maxEvents <= 0 && timeout <= 0
-}
--- a/cmd/event/consume_stdin_test.go
+++ b/cmd/event/consume_stdin_test.go
@@ -61,70 +61,3 @@ func TestWatchStdinEOF_DiagnosticMessage(t *testing.T) {
 		t.Fatal("watchStdinEOF did not cancel within 1s of EOF")
 	}
 }
-
-func TestShouldWatchStdinEOF(t *testing.T) {
-	tests := []struct {
-		name       string
-		isTerminal bool
-		maxEvents  int
-		timeout    time.Duration
-		want       bool
-	}{
-		{
-			name:       "terminal",
-			isTerminal: true,
-			want:       false,
-		},
-		{
-			name: "non terminal unbounded",
-			want: true,
-		},
-		{
-			name:      "non terminal negative max events is unbounded",
-			maxEvents: -1,
-			want:      true,
-		},
-		{
-			name:    "non terminal negative timeout is unbounded",
-			timeout: -1 * time.Second,
-			want:    true,
-		},
-		{
-			name:      "non terminal max events bounded",
-			maxEvents: 1,
-			want:      false,
-		},
-		{
-			name:    "non terminal timeout bounded",
-			timeout: 10 * time.Minute,
-			want:    false,
-		},
-		{
-			name:      "non terminal both bounds positive",
-			maxEvents: 1,
-			timeout:   10 * time.Minute,
-			want:      false,
-		},
-		{
-			name:      "non terminal bounded max events with negative timeout",
-			maxEvents: 1,
-			timeout:   -1 * time.Second,
-			want:      false,
-		},
-		{
-			name:      "non terminal bounded timeout with negative max events",
-			maxEvents: -1,
-			timeout:   10 * time.Minute,
-			want:      false,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got := shouldWatchStdinEOF(tt.isTerminal, tt.maxEvents, tt.timeout)
-			if got != tt.want {
-				t.Fatalf("shouldWatchStdinEOF() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
--- a/cmd/event/consume_test.go
+++ b/cmd/event/consume_test.go
@@ -4,14 +4,9 @@
 package event

 import (
-	"context"
 	"errors"
 	"strings"
 	"testing"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/cmdutil"
-	"github.com/larksuite/cli/internal/credential"
 )

 func TestParseParams(t *testing.T) {
@@ -78,7 +73,6 @@ func TestParseParams(t *testing.T) {
 				if tc.wantEcho != "" && !strings.Contains(err.Error(), tc.wantEcho) {
 					t.Errorf("err %q should echo %q so user sees the bad input", err.Error(), tc.wantEcho)
 				}
-				assertInvalidArgumentParam(t, err, "--param")
 				return
 			}
 			if err != nil {
@@ -96,77 +90,6 @@ func TestParseParams(t *testing.T) {
 	}
 }

-// emptyTokenResolver resolves to a result that carries no token.
-type emptyTokenResolver struct{}
-
-func (emptyTokenResolver) ResolveToken(_ context.Context, _ credential.TokenSpec) (*credential.TokenResult, error) {
-	return &credential.TokenResult{}, nil
-}
-
-// failingTokenResolver fails outright with an untyped error.
-type failingTokenResolver struct{}
-
-func (failingTokenResolver) ResolveToken(_ context.Context, _ credential.TokenSpec) (*credential.TokenResult, error) {
-	return nil, errors.New("backend unavailable")
-}
-
-func factoryWithResolver(r credential.DefaultTokenResolver) *cmdutil.Factory {
-	return &cmdutil.Factory{Credential: credential.NewCredentialProvider(nil, nil, r, nil)}
-}
-
-func TestResolveTenantToken_EmptyTokenResult(t *testing.T) {
-	_, err := resolveTenantToken(context.Background(), factoryWithResolver(emptyTokenResolver{}), "cli_x")
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != errs.CategoryAuthentication || p.Subtype != errs.SubtypeTokenMissing {
-		t.Errorf("problem = %s/%s, want %s/%s", p.Category, p.Subtype,
-			errs.CategoryAuthentication, errs.SubtypeTokenMissing)
-	}
-	var malformed *credential.MalformedTokenResultError
-	if !errors.As(err, &malformed) {
-		t.Error("empty-token failure should preserve the credential-layer cause")
-	}
-}
-
-func TestResolveTenantToken_ResolverFailure(t *testing.T) {
-	_, err := resolveTenantToken(context.Background(), factoryWithResolver(failingTokenResolver{}), "cli_x")
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != errs.CategoryAuthentication || p.Subtype != errs.SubtypeTokenMissing {
-		t.Errorf("problem = %s/%s, want %s/%s", p.Category, p.Subtype,
-			errs.CategoryAuthentication, errs.SubtypeTokenMissing)
-	}
-	if errors.Unwrap(err) == nil {
-		t.Error("resolver failure should preserve its cause")
-	}
-}
-
-// assertInvalidArgumentParam verifies err is a typed validation error with
-// subtype invalid_argument naming the given flag in its param field.
-func assertInvalidArgumentParam(t *testing.T, err error, param string) {
-	t.Helper()
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Subtype != errs.SubtypeInvalidArgument {
-		t.Errorf("subtype = %s, want %s", ve.Subtype, errs.SubtypeInvalidArgument)
-	}
-	if ve.Param != param {
-		t.Errorf("param = %q, want %q", ve.Param, param)
-	}
-}
-
 func TestSanitizeOutputDir(t *testing.T) {
 	cases := []struct {
 		name       string
@@ -207,7 +130,6 @@ func TestSanitizeOutputDir(t *testing.T) {
 				if !errors.Is(err, tc.wantSentry) {
 					t.Fatalf("want errors.Is(err, %v), got %q", tc.wantSentry, err.Error())
 				}
-				assertInvalidArgumentParam(t, err, "--output-dir")
 				return
 			}
 			if err != nil {
--- a/cmd/event/format_helpers_test.go
+++ b/cmd/event/format_helpers_test.go
@@ -143,79 +143,6 @@ func TestWriteStatusText_CoversAllStates(t *testing.T) {
 	}
 }

-func TestWriteStatusText_ShowsSubColumn(t *testing.T) {
-	var buf bytes.Buffer
-	writeStatusText(&buf, []appStatus{
-		{
-			AppID:     "cli_RUNNINGXXXXXXXXX",
-			State:     stateRunning,
-			PID:       1234,
-			UptimeSec: 60,
-			Active:    2,
-			Consumers: []protocol.ConsumerInfo{
-				{PID: 1001, EventKey: "mail.x", SubscriptionID: "mail.x:alice", Received: 5, Dropped: 0},
-				{PID: 1002, EventKey: "mail.x", SubscriptionID: "mail.x:bob", Received: 3, Dropped: 0},
-			},
-		},
-	})
-	out := buf.String()
-	if !strings.Contains(out, "SUB") {
-		t.Errorf("missing SUB column header: %s", out)
-	}
-	if !strings.Contains(out, "alice") {
-		t.Errorf("missing alice suffix in SUB column: %s", out)
-	}
-	if !strings.Contains(out, "bob") {
-		t.Errorf("missing bob suffix in SUB column: %s", out)
-	}
-}
-
-func TestWriteStatusText_LegacySubscriptionID_RendersDash(t *testing.T) {
-	var buf bytes.Buffer
-	writeStatusText(&buf, []appStatus{
-		{
-			AppID:     "cli_RUNNINGXXXXXXXXX",
-			State:     stateRunning,
-			PID:       1234,
-			UptimeSec: 60,
-			Active:    1,
-			Consumers: []protocol.ConsumerInfo{
-				{PID: 1001, EventKey: "im.x", SubscriptionID: "", Received: 5},
-			},
-		},
-	})
-	out := buf.String()
-	if !strings.Contains(out, "SUB") {
-		t.Errorf("missing SUB header: %s", out)
-	}
-	if !strings.Contains(out, "-") {
-		t.Errorf("missing dash placeholder for empty SubscriptionID: %s", out)
-	}
-}
-
-func TestWriteStatusText_EventKeyEqualSubscriptionID_RendersDash(t *testing.T) {
-	var buf bytes.Buffer
-	writeStatusText(&buf, []appStatus{
-		{
-			AppID:     "cli_RUNNINGXXXXXXXXX",
-			State:     stateRunning,
-			PID:       1234,
-			UptimeSec: 60,
-			Active:    1,
-			Consumers: []protocol.ConsumerInfo{
-				{PID: 1001, EventKey: "im.x", SubscriptionID: "im.x", Received: 5},
-			},
-		},
-	})
-	out := buf.String()
-	if !strings.Contains(out, "SUB") {
-		t.Errorf("missing SUB header: %s", out)
-	}
-	if !strings.Contains(out, "-") {
-		t.Errorf("missing dash placeholder when SubscriptionID==EventKey: %s", out)
-	}
-}
-
 func TestWriteStatusJSON_OrphanHint(t *testing.T) {
 	var buf bytes.Buffer
 	if err := writeStatusJSON(&buf, []appStatus{
--- a/cmd/event/preflight_test.go
+++ b/cmd/event/preflight_test.go
@@ -8,10 +8,10 @@ import (
 	"strings"
 	"testing"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/appmeta"
 	"github.com/larksuite/cli/internal/core"
 	eventlib "github.com/larksuite/cli/internal/event"
+	"github.com/larksuite/cli/internal/output"
 )

 func newPreflightCtx(appID string, brand core.LarkBrand, identity core.Identity, keyDef *eventlib.KeyDefinition, appVer *appmeta.AppVersion) *preflightCtx {
@@ -89,17 +89,19 @@ func TestPreflightEventTypes_MissingBlocks(t *testing.T) {
 	if !strings.Contains(err.Error(), "mail.user_mailbox.event.message_read_v1") {
 		t.Errorf("error should name the missing event type, got: %v", err)
 	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
+	var exit *output.ExitError
+	if !errors.As(err, &exit) {
+		t.Fatalf("expected output.ExitError, got %T: %v", err, err)
 	}
-	if p.Category != errs.CategoryValidation || p.Subtype != errs.SubtypeFailedPrecondition {
-		t.Errorf("problem = %s/%s, want %s/%s", p.Category, p.Subtype,
-			errs.CategoryValidation, errs.SubtypeFailedPrecondition)
+	if exit.Code != output.ExitValidation {
+		t.Errorf("ExitCode = %d, want ExitValidation (%d)", exit.Code, output.ExitValidation)
+	}
+	if exit.Detail == nil {
+		t.Fatal("expected Detail with hint")
 	}
 	wantURL := "https://open.feishu.cn/app/cli_XXXXXXXXXXXXXXXX/event"
-	if !strings.Contains(p.Hint, wantURL) {
-		t.Errorf("hint missing subscription URL %q\ngot: %s", wantURL, p.Hint)
+	if !strings.Contains(exit.Detail.Hint, wantURL) {
+		t.Errorf("hint missing subscription URL %q\ngot: %s", wantURL, exit.Detail.Hint)
 	}
 }

@@ -143,19 +145,17 @@ func TestPreflightScopes_Bot_MissingBlocks(t *testing.T) {
 	if !strings.Contains(err.Error(), "im:message.group_at_msg") {
 		t.Errorf("error should name missing scope, got: %v", err)
 	}
-	var permErr *errs.PermissionError
-	if !errors.As(err, &permErr) {
-		t.Fatalf("expected *errs.PermissionError, got %T: %v", err, err)
+	var exit *output.ExitError
+	if !errors.As(err, &exit) {
+		t.Fatalf("expected output.ExitError, got %T: %v", err, err)
 	}
-	if permErr.Category != errs.CategoryAuthorization || permErr.Subtype != errs.SubtypeMissingScope {
-		t.Errorf("problem = %s/%s, want %s/%s", permErr.Category, permErr.Subtype,
-			errs.CategoryAuthorization, errs.SubtypeMissingScope)
+	if exit.Code != output.ExitAuth {
+		t.Errorf("ExitCode = %d, want ExitAuth (%d)", exit.Code, output.ExitAuth)
 	}
-	wantMissing := []string{"im:message.group_at_msg"}
-	if len(permErr.MissingScopes) != 1 || permErr.MissingScopes[0] != wantMissing[0] {
-		t.Errorf("MissingScopes = %v, want %v", permErr.MissingScopes, wantMissing)
+	if exit.Detail == nil {
+		t.Fatal("expected Detail with hint, got nil Detail")
 	}
-	hint := permErr.Hint
+	hint := exit.Detail.Hint
 	wantSubstrings := []string{
 		"https://open.feishu.cn/app/cli_x/auth?q=",
 		"im:message.group_at_msg",
--- a/cmd/event/runtime.go
+++ b/cmd/event/runtime.go
@@ -6,8 +6,8 @@ package event
 import (
 	"context"
 	"encoding/json"
+	"fmt"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/client"
 	"github.com/larksuite/cli/internal/core"
 )
@@ -26,11 +26,7 @@ func (r *consumeRuntime) CallAPI(ctx context.Context, method, path string, body
 		As:     r.accessIdentity,
 	})
 	if err != nil {
-		if _, ok := errs.ProblemOf(err); ok {
-			return nil, err
-		}
-		return nil, errs.NewNetworkError(errs.SubtypeNetworkTransport,
-			"api %s %s: %s", method, path, err).WithCause(err)
+		return nil, err
 	}
 	// Non-JSON HTTP errors (gateway text/plain 404 etc.) skip OAPI envelope parsing.
 	ct := resp.Header.Get("Content-Type")
@@ -40,20 +36,11 @@ func (r *consumeRuntime) CallAPI(ctx context.Context, method, path string, body
 		if len(body) > maxBodyEcho {
 			body = body[:maxBodyEcho] + "…(truncated)"
 		}
-		if resp.StatusCode >= 500 {
-			return nil, errs.NewNetworkError(errs.SubtypeNetworkServer,
-				"api %s %s returned %d: %s", method, path, resp.StatusCode, body).WithRetryable()
-		}
-		return nil, errs.NewInternalError(errs.SubtypeInvalidResponse,
-			"api %s %s returned %d: %s", method, path, resp.StatusCode, body)
+		return nil, fmt.Errorf("api %s %s returned %d: %s", method, path, resp.StatusCode, body)
 	}
 	result, err := client.ParseJSONResponse(resp)
 	if err != nil {
-		if _, ok := errs.ProblemOf(err); ok {
-			return nil, err
-		}
-		return nil, errs.NewInternalError(errs.SubtypeInvalidResponse,
-			"api %s %s: %s", method, path, err).WithCause(err)
+		return nil, err
 	}
 	if apiErr := r.client.CheckResponse(result, r.accessIdentity); apiErr != nil {
 		return json.RawMessage(resp.RawBody), apiErr
--- a/cmd/event/runtime_test.go
+++ b/cmd/event/runtime_test.go
@@ -1,147 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package event
-
-import (
-	"context"
-	"errors"
-	"io"
-	"net/http"
-	"strings"
-	"testing"
-
-	lark "github.com/larksuite/oapi-sdk-go/v3"
-	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/client"
-	"github.com/larksuite/cli/internal/core"
-	"github.com/larksuite/cli/internal/credential"
-)
-
-// staticTokenResolver always returns a fixed token without any HTTP calls.
-type staticTokenResolver struct{}
-
-func (s *staticTokenResolver) ResolveToken(_ context.Context, _ credential.TokenSpec) (*credential.TokenResult, error) {
-	return &credential.TokenResult{Token: "test-token"}, nil
-}
-
-// stubRoundTripper intercepts every outgoing request with a canned response.
-type stubRoundTripper struct {
-	respond func(*http.Request) (*http.Response, error)
-}
-
-func (s stubRoundTripper) RoundTrip(r *http.Request) (*http.Response, error) { return s.respond(r) }
-
-func newTestConsumeRuntime(rt http.RoundTripper) *consumeRuntime {
-	sdk := lark.NewClient("test-app", "test-secret",
-		lark.WithEnableTokenCache(false),
-		lark.WithLogLevel(larkcore.LogLevelError),
-		lark.WithHttpClient(&http.Client{Transport: rt}),
-	)
-	return &consumeRuntime{
-		client: &client.APIClient{
-			SDK:        sdk,
-			ErrOut:     io.Discard,
-			Credential: credential.NewCredentialProvider(nil, nil, &staticTokenResolver{}, nil),
-			Config:     &core.CliConfig{AppID: "test-app", AppSecret: "test-secret", Brand: core.BrandFeishu},
-		},
-		accessIdentity: core.AsBot,
-	}
-}
-
-func stubResponse(status int, contentType, body string) func(*http.Request) (*http.Response, error) {
-	return func(r *http.Request) (*http.Response, error) {
-		return &http.Response{
-			StatusCode: status,
-			Header:     http.Header{"Content-Type": []string{contentType}},
-			Body:       io.NopCloser(strings.NewReader(body)),
-			Request:    r,
-		}, nil
-	}
-}
-
-func requireCallAPIProblem(t *testing.T, err error, category errs.Category, subtype errs.Subtype) {
-	t.Helper()
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != category || p.Subtype != subtype {
-		t.Fatalf("problem = %s/%s, want %s/%s", p.Category, p.Subtype, category, subtype)
-	}
-}
-
-func TestConsumeRuntimeCallAPI_NonJSONHTTPError(t *testing.T) {
-	r := newTestConsumeRuntime(stubRoundTripper{respond: stubResponse(http.StatusNotFound, "text/plain", "gone")})
-	_, err := r.CallAPI(context.Background(), "GET", "/open-apis/event/v1/connection", nil)
-	requireCallAPIProblem(t, err, errs.CategoryInternal, errs.SubtypeInvalidResponse)
-	if !strings.Contains(err.Error(), "returned 404") {
-		t.Errorf("error should echo the HTTP status, got: %v", err)
-	}
-}
-
-func TestConsumeRuntimeCallAPI_NonJSONHTTPErrorTruncatesLongBody(t *testing.T) {
-	long := strings.Repeat("x", 300)
-	r := newTestConsumeRuntime(stubRoundTripper{respond: stubResponse(http.StatusBadGateway, "text/html", long)})
-	_, err := r.CallAPI(context.Background(), "GET", "/open-apis/event/v1/connection", nil)
-	requireCallAPIProblem(t, err, errs.CategoryNetwork, errs.SubtypeNetworkServer)
-	p, _ := errs.ProblemOf(err)
-	if !p.Retryable {
-		t.Fatal("5xx non-JSON response should be marked retryable")
-	}
-	if !strings.Contains(err.Error(), "…(truncated)") {
-		t.Errorf("long body should be truncated in the message, got: %v", err)
-	}
-}
-
-func TestConsumeRuntimeCallAPI_UnparsableJSONBody(t *testing.T) {
-	r := newTestConsumeRuntime(stubRoundTripper{respond: stubResponse(http.StatusOK, "application/json", "{not json")})
-	_, err := r.CallAPI(context.Background(), "GET", "/open-apis/event/v1/connection", nil)
-	requireCallAPIProblem(t, err, errs.CategoryInternal, errs.SubtypeInvalidResponse)
-}
-
-func TestConsumeRuntimeCallAPI_TransportFailure(t *testing.T) {
-	r := newTestConsumeRuntime(stubRoundTripper{respond: func(*http.Request) (*http.Response, error) {
-		return nil, errors.New("connection refused")
-	}})
-	_, err := r.CallAPI(context.Background(), "GET", "/open-apis/event/v1/connection", nil)
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != errs.CategoryNetwork {
-		t.Fatalf("category = %s, want %s", p.Category, errs.CategoryNetwork)
-	}
-}
-
-func TestConsumeRuntimeCallAPI_EnvelopeErrorIsTyped(t *testing.T) {
-	r := newTestConsumeRuntime(stubRoundTripper{respond: stubResponse(http.StatusOK, "application/json",
-		`{"code":99991663,"msg":"app not found"}`)})
-	_, err := r.CallAPI(context.Background(), "GET", "/open-apis/event/v1/connection", nil)
-	if err == nil {
-		t.Fatal("expected error, got nil")
-	}
-	if _, ok := errs.ProblemOf(err); !ok {
-		t.Fatalf("envelope error should be typed via BuildAPIError, got %T: %v", err, err)
-	}
-}
-
-func TestConsumeRuntimeCallAPI_Success(t *testing.T) {
-	r := newTestConsumeRuntime(stubRoundTripper{respond: stubResponse(http.StatusOK, "application/json",
-		`{"code":0,"data":{"ok":true}}`)})
-	raw, err := r.CallAPI(context.Background(), "GET", "/open-apis/event/v1/connection", nil)
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if !strings.Contains(string(raw), `"code":0`) {
-		t.Errorf("raw body should pass through, got: %s", raw)
-	}
-}
--- a/cmd/event/schema.go
+++ b/cmd/event/schema.go
@@ -11,7 +11,6 @@ import (

 	"github.com/spf13/cobra"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/cmdutil"
 	eventlib "github.com/larksuite/cli/internal/event"
 	"github.com/larksuite/cli/internal/event/schemas"
@@ -40,14 +39,12 @@ func resolveSchemaJSON(def *eventlib.KeyDefinition) (json.RawMessage, []string,
 	if len(def.Schema.FieldOverrides) > 0 {
 		var parsed map[string]interface{}
 		if err := json.Unmarshal(base, &parsed); err != nil {
-			return nil, nil, errs.NewInternalError(errs.SubtypeUnknown,
-				"parse base schema for field overrides: %s", err).WithCause(err)
+			return nil, nil, err
 		}
 		orphans := schemas.ApplyFieldOverrides(parsed, def.Schema.FieldOverrides)
 		out, err := json.Marshal(parsed)
 		if err != nil {
-			return nil, nil, errs.NewInternalError(errs.SubtypeUnknown,
-				"serialize schema with field overrides: %s", err).WithCause(err)
+			return nil, nil, err
 		}
 		return out, orphans, nil
 	}
@@ -76,7 +73,7 @@ func renderSpec(s *eventlib.SchemaSpec) (json.RawMessage, error) {
 		copy(buf, s.Raw)
 		return buf, nil
 	}
-	return nil, errs.NewInternalError(errs.SubtypeUnknown, "schemaSpec has neither Type nor Raw")
+	return nil, fmt.Errorf("schemaSpec has neither Type nor Raw")
 }

 func NewCmdSchema(f *cmdutil.Factory) *cobra.Command {
@@ -134,16 +131,12 @@ func runSchema(f *cmdutil.Factory, key string, asJSON bool) error {
 	if len(def.Params) > 0 {
 		fmt.Fprintf(out, "\nParameters:\n")
 		w := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0)
-		fmt.Fprintf(w, "  NAME\tTYPE\tREQUIRED\tSUB-KEY\tDEFAULT\tDESCRIPTION\n")
+		fmt.Fprintf(w, "  NAME\tTYPE\tREQUIRED\tDEFAULT\tDESCRIPTION\n")
 		for _, p := range def.Params {
 			required := "no"
 			if p.Required {
 				required = "yes"
 			}
-			subKey := "no"
-			if p.SubscriptionKey {
-				subKey = "yes"
-			}
 			defaultVal := p.Default
 			if defaultVal == "" {
 				defaultVal = "-"
@@ -152,7 +145,7 @@ func runSchema(f *cmdutil.Factory, key string, asJSON bool) error {
 			if desc == "" {
 				desc = "-"
 			}
-			fmt.Fprintf(w, "  %s\t%s\t%s\t%s\t%s\t%s\n", p.Name, p.Type, required, subKey, defaultVal, desc)
+			fmt.Fprintf(w, "  %s\t%s\t%s\t%s\t%s\n", p.Name, p.Type, required, defaultVal, desc)
 		}
 		w.Flush()

@@ -172,7 +165,7 @@ func runSchema(f *cmdutil.Factory, key string, asJSON bool) error {

 	resolved, _, err := resolveSchemaJSON(def)
 	if err != nil {
-		return err
+		return output.Errorf(output.ExitInternal, "internal", "resolve schema: %v", err)
 	}
 	if resolved != nil {
 		fmt.Fprintf(out, "\nOutput Schema:\n")
--- a/cmd/event/schema_test.go
+++ b/cmd/event/schema_test.go
@@ -10,7 +10,6 @@ import (
 	"strings"
 	"testing"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/cmdutil"
 	"github.com/larksuite/cli/internal/core"
 	eventlib "github.com/larksuite/cli/internal/event"
@@ -96,79 +95,6 @@ func TestRunSchema_JSONOutput(t *testing.T) {
 	}
 }

-func TestSchema_RendersSubscriptionKeyMarker(t *testing.T) {
-	const syntheticKey = "test.evt_sub"
-	t.Cleanup(func() { eventlib.UnregisterKeyForTest(syntheticKey) })
-
-	eventlib.RegisterKey(eventlib.KeyDefinition{
-		Key:       syntheticKey,
-		EventType: syntheticKey,
-		Params: []eventlib.ParamDef{
-			{Name: "mailbox", SubscriptionKey: true, Description: "subscription id source"},
-			{Name: "folders", Description: "filter only"},
-		},
-		Schema: eventlib.SchemaDef{Native: &eventlib.SchemaSpec{Type: reflect.TypeOf(struct{ X string }{})}},
-	})
-
-	f, stdout, _, _ := cmdutil.TestFactory(t, &core.CliConfig{AppID: "test"})
-	if err := runSchema(f, syntheticKey, false); err != nil {
-		t.Fatalf("runSchema: %v", err)
-	}
-
-	out := stdout.String()
-	if !strings.Contains(out, "SUB-KEY") {
-		t.Errorf("missing SUB-KEY column header in:\n%s", out)
-	}
-
-	// Find the mailbox row and verify "yes" is present
-	var mailboxRow string
-	for _, ln := range strings.Split(out, "\n") {
-		if strings.Contains(ln, "mailbox") && !strings.Contains(ln, "NAME") {
-			mailboxRow = ln
-			break
-		}
-	}
-	if !strings.Contains(mailboxRow, "yes") {
-		t.Errorf("mailbox row missing yes SUB-KEY marker: %q", mailboxRow)
-	}
-
-	// Find the folders row and verify "no" is present
-	var foldersRow string
-	for _, ln := range strings.Split(out, "\n") {
-		if strings.Contains(ln, "folders") && !strings.Contains(ln, "NAME") {
-			foldersRow = ln
-			break
-		}
-	}
-	if !strings.Contains(foldersRow, "no") {
-		t.Errorf("folders row missing no SUB-KEY marker: %q", foldersRow)
-	}
-}
-
-func TestSchema_JSON_IncludesSubscriptionKey(t *testing.T) {
-	const syntheticKey = "test.evt_json"
-	t.Cleanup(func() { eventlib.UnregisterKeyForTest(syntheticKey) })
-
-	eventlib.RegisterKey(eventlib.KeyDefinition{
-		Key:       syntheticKey,
-		EventType: syntheticKey,
-		Params:    []eventlib.ParamDef{{Name: "mailbox", SubscriptionKey: true}},
-		Schema:    eventlib.SchemaDef{Native: &eventlib.SchemaSpec{Type: reflect.TypeOf(struct{ X string }{})}},
-	})
-
-	f, stdout, _, _ := cmdutil.TestFactory(t, &core.CliConfig{AppID: "test"})
-	if err := runSchema(f, syntheticKey, true); err != nil {
-		t.Fatalf("runSchema json: %v", err)
-	}
-
-	if !strings.Contains(stdout.String(), `"subscription_key"`) {
-		t.Errorf("JSON output missing subscription_key field: %s", stdout.String())
-	}
-	if !strings.Contains(stdout.String(), `true`) {
-		t.Errorf("JSON output missing subscription_key: true value: %s", stdout.String())
-	}
-}
-
 func TestResolveSchemaJSON_CustomWithOverlay(t *testing.T) {
 	const syntheticKey = "t.custom.overlay"
 	t.Cleanup(func() { eventlib.UnregisterKeyForTest(syntheticKey) })
@@ -203,38 +129,3 @@ func TestResolveSchemaJSON_CustomWithOverlay(t *testing.T) {
 		t.Errorf("overlay format = %v, want open_id", got)
 	}
 }
-
-func TestRenderSpec_EmptySpecIsTypedInternalError(t *testing.T) {
-	_, err := renderSpec(&eventlib.SchemaSpec{})
-	if err == nil {
-		t.Fatal("expected error for spec with neither Type nor Raw")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != errs.CategoryInternal {
-		t.Errorf("category = %s, want %s", p.Category, errs.CategoryInternal)
-	}
-}
-
-func TestResolveSchemaJSON_InvalidBaseWithOverridesIsTypedInternalError(t *testing.T) {
-	def := &eventlib.KeyDefinition{
-		Key: "synthetic.invalid.base",
-		Schema: eventlib.SchemaDef{
-			Custom:         &eventlib.SchemaSpec{Raw: json.RawMessage("{not json")},
-			FieldOverrides: map[string]schemas.FieldMeta{"x": {}},
-		},
-	}
-	_, _, err := resolveSchemaJSON(def)
-	if err == nil {
-		t.Fatal("expected error for unparsable base schema")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed errs error, got %T: %v", err, err)
-	}
-	if p.Category != errs.CategoryInternal {
-		t.Errorf("category = %s, want %s", p.Category, errs.CategoryInternal)
-	}
-}
--- a/cmd/event/status.go
+++ b/cmd/event/status.go
@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"io"
 	"sort"
-	"strings"
 	"sync"
 	"time"

@@ -243,17 +242,12 @@ func writeStatusText(out io.Writer, statuses []appStatus) {
 				s.PID, (time.Duration(s.UptimeSec) * time.Second).String())
 			fmt.Fprintf(out, "  Active consumers: %d\n", s.Active)
 			if len(s.Consumers) > 0 {
-				headers := []string{"CONSUMER", "EVENT KEY", "SUB", "RECEIVED", "DROPPED"}
+				headers := []string{"CONSUMER", "EVENT KEY", "RECEIVED", "DROPPED"}
 				rows := make([][]string, 0, len(s.Consumers))
 				for _, c := range s.Consumers {
-					subDisplay := "-"
-					if c.SubscriptionID != "" && c.SubscriptionID != c.EventKey {
-						subDisplay = strings.TrimPrefix(c.SubscriptionID, c.EventKey+":")
-					}
 					rows = append(rows, []string{
 						fmt.Sprintf("pid=%d", c.PID),
 						c.EventKey,
-						subDisplay,
 						fmt.Sprintf("%d", c.Received),
 						fmt.Sprintf("%d", c.Dropped),
 					})
--- a/cmd/event/suggestions.go
+++ b/cmd/event/suggestions.go
@@ -8,8 +8,8 @@ import (
 	"sort"
 	"strings"

-	"github.com/larksuite/cli/errs"
 	eventlib "github.com/larksuite/cli/internal/event"
+	"github.com/larksuite/cli/internal/output"
 	"github.com/larksuite/cli/internal/suggest"
 )

@@ -64,6 +64,9 @@ func unknownEventKeyErr(key string) error {
 	if guesses := suggestEventKeys(key); len(guesses) > 0 {
 		msg += " — did you mean " + formatSuggestions(guesses) + "?"
 	}
-	return errs.NewValidationError(errs.SubtypeInvalidArgument, "%s", msg).
-		WithHint("Run 'lark-cli event list' to see available keys.")
+	return output.ErrWithHint(
+		output.ExitValidation, "validation",
+		msg,
+		"Run 'lark-cli event list' to see available keys.",
+	)
 }
--- a/cmd/skill/skill.go
+++ b/cmd/skill/skill.go
@@ -1,183 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-// Package skill implements the `lark-cli skills` command group, which serves
-// binary-embedded skill content to AI agents. The package is "skill"; the
-// user-facing verb is "skills".
-package skill
-
-import (
-	"fmt"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/cmdutil"
-	"github.com/larksuite/cli/internal/output"
-	"github.com/larksuite/cli/internal/skillcontent"
-	"github.com/spf13/cobra"
-)
-
-func newReader(f *cmdutil.Factory) (*skillcontent.Reader, error) {
-	if f.SkillContent == nil {
-		return nil, errs.NewInternalError(errs.SubtypeFileIO,
-			"skill content not embedded in this build")
-	}
-	return skillcontent.New(f.SkillContent), nil
-}
-
-type readEnvelope struct {
-	Skill    string `json:"skill"`
-	Path     string `json:"path"`
-	Content  string `json:"content"`
-	Guidance string `json:"guidance,omitempty"`
-}
-
-type listEnvelope struct {
-	OK     bool                     `json:"ok"`
-	Skills []skillcontent.SkillInfo `json:"skills"`
-	Count  int                      `json:"count"`
-}
-
-type listPathEnvelope struct {
-	OK      bool                    `json:"ok"`
-	Path    string                  `json:"path"`
-	Entries []skillcontent.DirEntry `json:"entries"`
-	Count   int                     `json:"count"`
-}
-
-func NewCmdSkill(f *cmdutil.Factory) *cobra.Command {
-	cmd := &cobra.Command{
-		Use:   "skills",
-		Short: "Read embedded skill content (list / read)",
-		Long: "Read agent-readable skill content (SKILL.md and reference files) embedded in " +
-			"the CLI binary at build time, so it stays in sync with the CLI version. " +
-			"Machine resources such as assets/ and scripts/ are not embedded.",
-	}
-	// Risk is set on each leaf (GetRisk does not walk parents); the group has none.
-	cmdutil.DisableAuthCheck(cmd)
-	cmd.AddCommand(newListCmd(f), newReadCmd(f))
-	return cmd
-}
-
-func newListCmd(f *cmdutil.Factory) *cobra.Command {
-	cmd := &cobra.Command{
-		Use:   "list [name[/path]]",
-		Short: "List skills, or list one layer under a skill path (like ls)",
-		Example: `  lark-cli skills list                      # all skills: name, description, version
-  lark-cli skills list lark-doc             # one layer under a skill (like ls)
-  lark-cli skills list lark-doc/references  # one layer under a subdirectory`,
-		Args: cobra.ArbitraryArgs,
-		RunE: func(cmd *cobra.Command, args []string) error {
-			if len(args) > 1 {
-				return errs.NewValidationError(errs.SubtypeInvalidArgument,
-					"list takes at most 1 argument: [name[/path]]").
-					WithHint("run 'lark-cli skills list --help'")
-			}
-			r, err := newReader(f)
-			if err != nil {
-				return err
-			}
-			if len(args) == 0 {
-				skills, err := r.List()
-				if err != nil {
-					return err
-				}
-				output.PrintJson(f.IOStreams.Out, listEnvelope{OK: true, Skills: skills, Count: len(skills)})
-				return nil
-			}
-			entries, listed, err := r.ListPath(args[0])
-			if err != nil {
-				return err
-			}
-			output.PrintJson(f.IOStreams.Out, listPathEnvelope{OK: true, Path: listed, Entries: entries, Count: len(entries)})
-			return nil
-		},
-	}
-	// --json is a no-op (list is always JSON), accepted only to stay symmetric with read.
-	cmd.Flags().Bool("json", false, "no-op (list output is always JSON)")
-	cmdutil.SetRisk(cmd, "read")
-	cmdutil.DisableAuthCheck(cmd)
-	return cmd
-}
-
-func newReadCmd(f *cmdutil.Factory) *cobra.Command {
-	var asJSON bool
-	cmd := &cobra.Command{
-		Use:   "read <name>[/<path>] [path]",
-		Short: "Print a skill's SKILL.md, or a file under the skill (raw markdown by default)",
-		Example: `  lark-cli skills read lark-doc                             # the skill's SKILL.md
-  lark-cli skills read lark-doc references/lark-doc-fetch.md  # a file under the skill
-  lark-cli skills read lark-doc/references/lark-doc-fetch.md  # same, slash form
-  lark-cli skills read lark-doc --json                      # JSON envelope`,
-		Args: cobra.ArbitraryArgs,
-		RunE: func(cmd *cobra.Command, args []string) error {
-			name, relpath, err := parseReadTarget(args)
-			if err != nil {
-				return err
-			}
-			r, err := newReader(f)
-			if err != nil {
-				return err
-			}
-
-			var content []byte
-			var pathOut string
-			if relpath == "" {
-				content, err = r.ReadSkill(name)
-				pathOut = "SKILL.md"
-			} else {
-				content, pathOut, err = r.ReadReference(name, relpath)
-			}
-			if err != nil {
-				return err
-			}
-
-			isMain := pathOut == "SKILL.md"
-			if asJSON {
-				env := readEnvelope{Skill: name, Path: pathOut, Content: string(content)}
-				if isMain {
-					env.Guidance = readGuidance(name)
-				}
-				output.PrintJson(f.IOStreams.Out, env)
-				return nil
-			}
-			// Raw stdout stays byte-identical to the file; guidance goes to stderr.
-			if _, err := f.IOStreams.Out.Write(content); err != nil {
-				return errs.NewInternalError(errs.SubtypeFileIO, "failed to write output: %v", err)
-			}
-			if isMain {
-				fmt.Fprintln(f.IOStreams.ErrOut, readGuidance(name))
-			}
-			return nil
-		},
-	}
-	cmd.Flags().BoolVar(&asJSON, "json", false, "output as a JSON envelope instead of raw markdown")
-	cmdutil.SetRisk(cmd, "read")
-	cmdutil.DisableAuthCheck(cmd)
-	return cmd
-}
-
-// parseReadTarget maps 1-or-2 positional args to (name, relpath); a lone
-// "<a>/<b>" splits on the first '/', and relpath "" reads the main SKILL.md.
-func parseReadTarget(args []string) (name, relpath string, err error) {
-	switch len(args) {
-	case 1:
-		name, relpath = skillcontent.SplitArg(args[0])
-		return name, relpath, nil
-	case 2:
-		return args[0], args[1], nil
-	default:
-		return "", "", errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"read requires 1 or 2 arguments: <name>[/<path>] [path]").
-			WithHint("run 'lark-cli skills read --help'")
-	}
-}
-
-// readGuidance routes cross-skill "../lark-foo/..." references back through
-// `skills read lark-foo/...`: the path guard rejects a literal "../", so the
-// relative form must be rewritten.
-func readGuidance(name string) string {
-	return fmt.Sprintf("> Tip: read this skill's own files (e.g. `references/...`) with "+
-		"`lark-cli skills read %s <relative-path>` to keep them in sync with this CLI version. "+
-		"A reference to another skill (`../lark-foo/...`) uses the same command with the "+
-		"leading `../` removed: `lark-cli skills read lark-foo/...`.", name)
-}
--- a/cmd/skill/skill_test.go
+++ b/cmd/skill/skill_test.go
@@ -1,306 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package skill
-
-import (
-	"encoding/json"
-	"io"
-	"io/fs"
-	"strings"
-	"testing"
-	"testing/fstest"
-
-	"github.com/larksuite/cli/internal/cmdutil"
-)
-
-// calFS is the default single-skill content tree for these tests. The embedded
-// FS is now injected through the Factory (no package global), so tests pass it
-// explicitly to run() — nothing is shared, so they are safe under -parallel.
-func calFS() fstest.MapFS {
-	return fstest.MapFS{
-		"lark-calendar/SKILL.md":             {Data: []byte("---\nname: lark-calendar\nversion: 1.0.0\ndescription: \"Cal\"\nmetadata:\n  cliHelp: \"lark-cli calendar --help\"\n---\nbody")},
-		"lark-calendar/references/agenda.md": {Data: []byte("# Agenda")},
-	}
-}
-
-// run executes the skills command tree against the given content FS (may be nil
-// to exercise the not-embedded path) and returns stdout/stderr/err.
-func run(t *testing.T, fsys fs.FS, args ...string) (stdout, stderr string, err error) {
-	t.Helper()
-	// Isolate CLI config state so tests never read/write the real config dir
-	// (repo convention).
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-	f, out, errOut, _ := cmdutil.TestFactory(t, nil)
-	f.SkillContent = fsys
-	cmd := NewCmdSkill(f)
-	cmd.SetOut(io.Discard)
-	cmd.SetErr(io.Discard)
-	cmd.SetArgs(args)
-	err = cmd.Execute()
-	return out.String(), errOut.String(), err
-}
-
-func TestSkillList(t *testing.T) {
-	stdout, _, err := run(t, calFS(), "list")
-	if err != nil {
-		t.Fatalf("list error: %v", err)
-	}
-	var got struct {
-		OK     bool             `json:"ok"`
-		Skills []map[string]any `json:"skills"`
-		Count  int              `json:"count"`
-	}
-	if e := json.Unmarshal([]byte(stdout), &got); e != nil {
-		t.Fatalf("invalid JSON: %v\n%s", e, stdout)
-	}
-	// "ok" is an explicit success marker (the list envelope is a typed struct;
-	// no automatic _notice attaches).
-	if !got.OK {
-		t.Error("expected ok=true in list envelope")
-	}
-	if got.Count != 1 || len(got.Skills) != 1 {
-		t.Fatalf("count: got %d", got.Count)
-	}
-	if got.Skills[0]["name"] != "lark-calendar" {
-		t.Errorf("name: got %v", got.Skills[0]["name"])
-	}
-	// Top-level list carries version + metadata, not a references list.
-	if _, ok := got.Skills[0]["references"]; ok {
-		t.Error("top-level list must not include references")
-	}
-	if got.Skills[0]["version"] != "1.0.0" {
-		t.Errorf("version: got %v, want 1.0.0", got.Skills[0]["version"])
-	}
-	if _, ok := got.Skills[0]["metadata"]; !ok {
-		t.Error("expected metadata in list entry")
-	}
-}
-
-func TestSkillListJSONFlagAccepted(t *testing.T) {
-	// `list --json` must be accepted (no-op), not rejected as an unknown flag,
-	// so it stays symmetric with read --json.
-	stdout, _, err := run(t, calFS(), "list", "--json")
-	if err != nil {
-		t.Fatalf("list --json error: %v", err)
-	}
-	var got struct {
-		OK    bool `json:"ok"`
-		Count int  `json:"count"`
-	}
-	if e := json.Unmarshal([]byte(stdout), &got); e != nil {
-		t.Fatalf("invalid JSON: %v\n%s", e, stdout)
-	}
-	if !got.OK || got.Count != 1 {
-		t.Errorf("envelope: %+v", got)
-	}
-}
-
-func TestSkillListPath(t *testing.T) {
-	stdout, _, err := run(t, calFS(), "list", "lark-calendar")
-	if err != nil {
-		t.Fatalf("list <name> error: %v", err)
-	}
-	var got struct {
-		OK      bool   `json:"ok"`
-		Path    string `json:"path"`
-		Entries []struct {
-			Path  string `json:"path"`
-			IsDir bool   `json:"is_dir"`
-		} `json:"entries"`
-		Count int `json:"count"`
-	}
-	if e := json.Unmarshal([]byte(stdout), &got); e != nil {
-		t.Fatalf("invalid JSON: %v\n%s", e, stdout)
-	}
-	if !got.OK || got.Path != "lark-calendar" {
-		t.Errorf("envelope: %+v", got)
-	}
-	// One layer under the skill root: SKILL.md (file) + references (dir).
-	if got.Count != 2 || len(got.Entries) != 2 {
-		t.Fatalf("entries: got %+v", got.Entries)
-	}
-	if got.Entries[0].Path != "lark-calendar/SKILL.md" || got.Entries[0].IsDir {
-		t.Errorf("entry[0]: got %+v", got.Entries[0])
-	}
-	if got.Entries[1].Path != "lark-calendar/references" || !got.Entries[1].IsDir {
-		t.Errorf("entry[1]: got %+v", got.Entries[1])
-	}
-}
-
-func TestSkillListPathUnknown(t *testing.T) {
-	_, _, err := run(t, calFS(), "list", "no-such-skill")
-	if err == nil || !strings.Contains(err.Error(), "unknown skill") {
-		t.Fatalf("expected 'unknown skill' error, got %v", err)
-	}
-}
-
-func TestSkillListPathTraversal(t *testing.T) {
-	stdout, _, err := run(t, calFS(), "list", "lark-calendar/../../etc")
-	if err == nil || !strings.Contains(err.Error(), "invalid path") {
-		t.Fatalf("expected 'invalid path' error, got %v", err)
-	}
-	if stdout != "" {
-		t.Errorf("stdout must be empty on rejection, got %q", stdout)
-	}
-}
-
-func TestSkillListTooManyArgs(t *testing.T) {
-	_, _, err := run(t, calFS(), "list", "a", "b")
-	if err == nil || !strings.Contains(err.Error(), "at most 1 argument") {
-		t.Fatalf("expected 'at most 1 argument' error, got %v", err)
-	}
-}
-
-// TestSkillListSkipsDirWithoutSKILLmd proves a top-level dir lacking SKILL.md is
-// omitted from the catalog (no blank entry).
-func TestSkillListSkipsDirWithoutSKILLmd(t *testing.T) {
-	fsys := fstest.MapFS{
-		"lark-calendar/SKILL.md": {Data: []byte("---\nname: lark-calendar\ndescription: \"Cal\"\n---\nb")},
-		"not-a-skill/readme.txt": {Data: []byte("junk")}, // dir without SKILL.md
-	}
-	stdout, _, err := run(t, fsys, "list")
-	if err != nil {
-		t.Fatalf("list error: %v", err)
-	}
-	var got struct {
-		Skills []map[string]any `json:"skills"`
-		Count  int              `json:"count"`
-	}
-	if e := json.Unmarshal([]byte(stdout), &got); e != nil {
-		t.Fatalf("invalid JSON: %v\n%s", e, stdout)
-	}
-	if got.Count != 1 || got.Skills[0]["name"] != "lark-calendar" {
-		t.Fatalf("expected only lark-calendar, got %+v", got.Skills)
-	}
-}
-
-func TestSkillReadRaw(t *testing.T) {
-	stdout, stderr, err := run(t, calFS(), "read", "lark-calendar")
-	if err != nil {
-		t.Fatalf("read error: %v", err)
-	}
-	if !strings.HasPrefix(stdout, "---\nname: lark-calendar") {
-		t.Errorf("raw output: got %q", stdout)
-	}
-	// Raw stdout is byte-pure SKILL.md — the guidance tip must NOT be appended.
-	if strings.Contains(stdout, "Tip:") {
-		t.Errorf("raw stdout must not carry the guidance tip: got %q", stdout)
-	}
-	// Guidance goes to stderr: own files via `skills read <name> ...`, and
-	// cross-skill refs routed to `skills read <other-skill> ...` (version-
-	// consistent), not "read directly".
-	if !strings.Contains(stderr, "lark-cli skills read lark-calendar <relative-path>") {
-		t.Errorf("expected own-files guidance on stderr: got %q", stderr)
-	}
-	if !strings.Contains(stderr, "lark-cli skills read lark-foo/...") {
-		t.Errorf("expected cross-skill refs routed to skills read: got %q", stderr)
-	}
-	if strings.Contains(stderr, "instead of opening them directly") ||
-		strings.Contains(stderr, "read those directly") {
-		t.Errorf("guidance must not steer cross-skill refs to direct reads: got %q", stderr)
-	}
-}
-
-func TestSkillReadJSON(t *testing.T) {
-	stdout, _, err := run(t, calFS(), "read", "lark-calendar", "--json")
-	if err != nil {
-		t.Fatalf("read --json error: %v", err)
-	}
-	var got struct {
-		Skill, Path, Content, Guidance string
-	}
-	if e := json.Unmarshal([]byte(stdout), &got); e != nil {
-		t.Fatalf("invalid JSON: %v", e)
-	}
-	if got.Skill != "lark-calendar" || got.Path != "SKILL.md" || got.Content == "" {
-		t.Errorf("envelope: %+v", got)
-	}
-	// Guidance is a separate field, not merged into content.
-	if got.Guidance == "" {
-		t.Error("expected guidance field for main SKILL.md")
-	}
-	if strings.Contains(got.Content, "Tip:") {
-		t.Error("guidance must not be merged into content")
-	}
-}
-
-func TestSkillReadFile(t *testing.T) {
-	// Both the 2-arg and slash forms read the same file, with no guidance tip.
-	for _, args := range [][]string{
-		{"read", "lark-calendar", "references/agenda.md"},
-		{"read", "lark-calendar/references/agenda.md"},
-	} {
-		stdout, stderr, err := run(t, calFS(), args...)
-		if err != nil {
-			t.Fatalf("read %v error: %v", args, err)
-		}
-		if stdout != "# Agenda" {
-			t.Errorf("read %v output: got %q", args, stdout)
-		}
-		// Reference reads carry no guidance on either stream.
-		if strings.Contains(stderr, "Tip:") {
-			t.Errorf("read %v must not emit guidance on stderr: got %q", args, stderr)
-		}
-	}
-}
-
-func TestSkillReadFileJSON(t *testing.T) {
-	stdout, _, err := run(t, calFS(), "read", "lark-calendar", "references/agenda.md", "--json")
-	if err != nil {
-		t.Fatalf("read file --json error: %v", err)
-	}
-	var got struct {
-		Skill, Path, Content, Guidance string
-	}
-	if e := json.Unmarshal([]byte(stdout), &got); e != nil {
-		t.Fatalf("invalid JSON: %v\n%s", e, stdout)
-	}
-	if got.Skill != "lark-calendar" || got.Path != "references/agenda.md" || got.Content != "# Agenda" {
-		t.Errorf("envelope: %+v", got)
-	}
-	// Reference reads do not carry the guidance tip.
-	if got.Guidance != "" {
-		t.Errorf("reference read must not include guidance, got %q", got.Guidance)
-	}
-}
-
-func TestSkillReadUnknown(t *testing.T) {
-	_, _, err := run(t, calFS(), "read", "no-such")
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	if !strings.Contains(err.Error(), "unknown skill") {
-		t.Errorf("err: %v", err)
-	}
-}
-
-func TestSkillReadMissingArg(t *testing.T) {
-	_, _, err := run(t, calFS(), "read")
-	if err == nil || !strings.Contains(err.Error(), "requires 1 or 2 arguments") {
-		t.Fatalf("expected arg error, got %v", err)
-	}
-}
-
-func TestSkillReadTraversal(t *testing.T) {
-	stdout, _, err := run(t, calFS(), "read", "lark-calendar", "../../etc/passwd")
-	if err == nil {
-		t.Fatal("expected rejection")
-	}
-	if !strings.Contains(err.Error(), "invalid path") {
-		t.Errorf("err: %v", err)
-	}
-	if stdout != "" {
-		t.Errorf("stdout must be empty on rejection, got %q", stdout)
-	}
-}
-
-func TestSkillNilContentFS(t *testing.T) {
-	_, _, err := run(t, nil, "list")
-	if err == nil {
-		t.Fatal("expected error when SkillContent is nil")
-	}
-	if !strings.Contains(err.Error(), "not embedded") {
-		t.Errorf("err: %v", err)
-	}
-}
--- a/cmd/update/update_test.go
+++ b/cmd/update/update_test.go
@@ -49,21 +49,12 @@ func mockDetectAndNpm(t *testing.T, result selfupdate.DetectResult, npmFn func(s
 		u.DetectOverride = func() selfupdate.DetectResult { return result }
 		u.NpmInstallOverride = npmFn
 		u.VerifyOverride = func(string) error { return nil }
-		u.SkillsIndexFetchOverride = successfulSkillsIndexFetch()
 		u.SkillsCommandOverride = successfulSkillsCommand()
 		return u
 	}
 	t.Cleanup(func() { newUpdater = origNew })
 }

-func successfulSkillsIndexFetch() func() *selfupdate.NpmResult {
-	return func() *selfupdate.NpmResult {
-		r := &selfupdate.NpmResult{}
-		r.Stdout.WriteString(`{"skills":[{"name":"lark-calendar"},{"name":"lark-mail"}]}`)
-		return r
-	}
-}
-
 func successfulSkillsCommand() func(args ...string) *selfupdate.NpmResult {
 	return func(args ...string) *selfupdate.NpmResult {
 		r := &selfupdate.NpmResult{}
@@ -487,10 +478,6 @@ func TestUpdateNpmVerifyFail_JSON_NoRestoreHintWhenBackupUnavailable(t *testing.
 		u.NpmInstallOverride = func(version string) *selfupdate.NpmResult { return &selfupdate.NpmResult{} }
 		u.VerifyOverride = func(string) error { return errors.New("bad binary") }
 		u.RestoreAvailableOverride = func() bool { return false }
-		u.SkillsIndexFetchOverride = func() *selfupdate.NpmResult {
-			t.Fatal("skills sync should not run when binary verification fails")
-			return nil
-		}
 		u.SkillsCommandOverride = func(args ...string) *selfupdate.NpmResult {
 			t.Fatal("skills sync should not run when binary verification fails")
 			return nil
@@ -823,11 +810,6 @@ func TestUpdateNpm_SkillsFail_JSON(t *testing.T) {
 		}
 		u.NpmInstallOverride = func(version string) *selfupdate.NpmResult { return &selfupdate.NpmResult{} }
 		u.VerifyOverride = func(string) error { return nil }
-		u.SkillsIndexFetchOverride = func() *selfupdate.NpmResult {
-			r := &selfupdate.NpmResult{}
-			r.Err = fmt.Errorf("index unavailable")
-			return r
-		}
 		u.SkillsCommandOverride = func(args ...string) *selfupdate.NpmResult {
 			r := &selfupdate.NpmResult{}
 			r.Stderr.WriteString("npx: command not found")
@@ -880,11 +862,6 @@ func TestUpdateNpm_SkillsFail_Human(t *testing.T) {
 		}
 		u.NpmInstallOverride = func(version string) *selfupdate.NpmResult { return &selfupdate.NpmResult{} }
 		u.VerifyOverride = func(string) error { return nil }
-		u.SkillsIndexFetchOverride = func() *selfupdate.NpmResult {
-			r := &selfupdate.NpmResult{}
-			r.Err = fmt.Errorf("index unavailable")
-			return r
-		}
 		u.SkillsCommandOverride = func(args ...string) *selfupdate.NpmResult {
 			r := &selfupdate.NpmResult{}
 			r.Stderr.WriteString("npx: command not found")
@@ -1029,7 +1006,6 @@ func TestUpdateRun_AlreadyLatest_RunsSkillsSync(t *testing.T) {
 	t.Cleanup(func() { newUpdater = origNew })
 	newUpdater = func() *selfupdate.Updater {
 		return &selfupdate.Updater{
-			SkillsIndexFetchOverride: successfulSkillsIndexFetch(),
 			SkillsCommandOverride: func(args ...string) *selfupdate.NpmResult {
 				skillsCalled = true
 				return successfulSkillsCommand()(args...)
@@ -1068,7 +1044,6 @@ func TestUpdateRun_Manual_RunsSkillsSync(t *testing.T) {
 	t.Cleanup(func() { newUpdater = origNew })
 	newUpdater = func() *selfupdate.Updater {
 		return &selfupdate.Updater{
-			SkillsIndexFetchOverride: successfulSkillsIndexFetch(),
 			DetectOverride: func() selfupdate.DetectResult {
 				return selfupdate.DetectResult{
 					Method:       selfupdate.InstallManual,
@@ -1113,7 +1088,6 @@ func TestUpdateRun_Npm_RunsSkillsSync_WritesLatestState(t *testing.T) {
 	t.Cleanup(func() { newUpdater = origNew })
 	newUpdater = func() *selfupdate.Updater {
 		return &selfupdate.Updater{
-			SkillsIndexFetchOverride: successfulSkillsIndexFetch(),
 			DetectOverride: func() selfupdate.DetectResult {
 				return selfupdate.DetectResult{
 					Method: selfupdate.InstallNpm, NpmAvailable: true,
@@ -1173,10 +1147,6 @@ func TestUpdateRun_CheckIncludesSkillsStatus(t *testing.T) {
 			DetectOverride: func() selfupdate.DetectResult {
 				return selfupdate.DetectResult{Method: selfupdate.InstallNpm, NpmAvailable: true}
 			},
-			SkillsIndexFetchOverride: func() *selfupdate.NpmResult {
-				skillsCalled = true
-				return successfulSkillsIndexFetch()()
-			},
 			SkillsCommandOverride: func(args ...string) *selfupdate.NpmResult {
 				skillsCalled = true
 				return successfulSkillsCommand()(args...)
@@ -1226,10 +1196,6 @@ func TestUpdateRun_CheckAlreadyLatest_NoSideEffect(t *testing.T) {
 	t.Cleanup(func() { newUpdater = origNew })
 	newUpdater = func() *selfupdate.Updater {
 		return &selfupdate.Updater{
-			SkillsIndexFetchOverride: func() *selfupdate.NpmResult {
-				skillsCalled = true
-				return successfulSkillsIndexFetch()()
-			},
 			SkillsCommandOverride: func(args ...string) *selfupdate.NpmResult {
 				skillsCalled = true
 				return successfulSkillsCommand()(args...)
--- a/errs/subtypes.go
+++ b/errs/subtypes.go
@@ -80,7 +80,6 @@ const (
 	SubtypeSDKError        Subtype = "sdk_error"        // lark SDK Do() returned an unexpected error
 	SubtypeInvalidResponse Subtype = "invalid_response" // SDK response body not parsable as JSON
 	SubtypeFileIO          Subtype = "file_io"          // local file I/O failure (mkdir / write / read)
-	SubtypeExternalTool    Subtype = "external_tool"    // an external tool the CLI shells out to (git, npx) failed at runtime; the tool output is in the message
 	SubtypeStorage         Subtype = "storage"          // local persistence failure (e.g. config file save)
 	// Generic untyped error lifted to InternalError uses SubtypeUnknown.
 )
--- a/events/minutes/preconsume.go
+++ b/events/minutes/preconsume.go
@@ -5,19 +5,18 @@ package minutes

 import (
 	"context"
+	"fmt"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/event"
 )

 const cleanupTimeout = 5 * time.Second

-func subscriptionPreConsume(eventType, subscribePath, unsubscribePath string) func(context.Context, event.APIClient, map[string]string) (func() error, error) {
-	return func(ctx context.Context, rt event.APIClient, _ map[string]string) (func() error, error) {
+func subscriptionPreConsume(eventType, subscribePath, unsubscribePath string) func(context.Context, event.APIClient, map[string]string) (func(), error) {
+	return func(ctx context.Context, rt event.APIClient, _ map[string]string) (func(), error) {
 		if rt == nil {
-			return nil, errs.NewInternalError(errs.SubtypeUnknown,
-				"runtime API client is required for pre-consume subscription")
+			return nil, fmt.Errorf("runtime API client is required for pre-consume subscription")
 		}

 		body := map[string]string{"event_type": eventType}
@@ -25,13 +24,10 @@ func subscriptionPreConsume(eventType, subscribePath, unsubscribePath string) fu
 			return nil, err
 		}

-		return func() error {
+		return func() {
 			cleanupCtx, cancel := context.WithTimeout(context.Background(), cleanupTimeout)
 			defer cancel()
-			if _, err := rt.CallAPI(cleanupCtx, "POST", unsubscribePath, body); err != nil {
-				return err
-			}
-			return nil
+			_, _ = rt.CallAPI(cleanupCtx, "POST", unsubscribePath, body)
 		}, nil
 	}
 }
--- a/events/vc/note_detail_retry_test.go
+++ b/events/vc/note_detail_retry_test.go
@@ -1,35 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package vc
-
-import (
-	"errors"
-	"testing"
-
-	"github.com/larksuite/cli/errs"
-)
-
-// isLarkCode must match the API code on typed errs.* errors — the consume
-// runtime classifies OAPI failures via errclass.BuildAPIError, so the
-// not-found retry in fillVCNoteGeneratedDetails depends on this reading
-// Problem.Code rather than the legacy envelope shape.
-func TestIsLarkCode_MatchesTypedAPIErrorCode(t *testing.T) {
-	typedNotFound := errs.NewAPIError(errs.SubtypeNotFound, "note not ready").
-		WithCode(vcNoteDetailNotFoundCode)
-	if !isLarkCode(typedNotFound, vcNoteDetailNotFoundCode) {
-		t.Fatal("typed API error carrying the not-found code must match (retry path)")
-	}
-	if isLarkCode(typedNotFound, 99999) {
-		t.Error("a different expected code must not match")
-	}
-
-	otherTyped := errs.NewAPIError(errs.SubtypeServerError, "boom").WithCode(500)
-	if isLarkCode(otherTyped, vcNoteDetailNotFoundCode) {
-		t.Error("typed error with another code must not match")
-	}
-
-	if isLarkCode(errors.New("plain failure"), vcNoteDetailNotFoundCode) {
-		t.Error("untyped error must not match")
-	}
-}
--- a/events/vc/note_generated.go
+++ b/events/vc/note_generated.go
@@ -6,11 +6,12 @@ package vc
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/event"
+	"github.com/larksuite/cli/internal/output"
 	"github.com/larksuite/cli/internal/validate"
 )

@@ -147,8 +148,9 @@ func fillVCNoteGeneratedDetails(ctx context.Context, rt event.APIClient, out *VC
 }

 func isLarkCode(err error, code int) bool {
-	if p, ok := errs.ProblemOf(err); ok {
-		return p.Code == code
+	var exitErr *output.ExitError
+	if errors.As(err, &exitErr) && exitErr.Detail != nil {
+		return exitErr.Detail.Code == code
 	}
 	return false
 }
--- a/events/vc/preconsume.go
+++ b/events/vc/preconsume.go
@@ -5,19 +5,18 @@ package vc

 import (
 	"context"
+	"fmt"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/event"
 )

 const cleanupTimeout = 5 * time.Second

-func subscriptionPreConsume(eventType, subscribePath, unsubscribePath string) func(context.Context, event.APIClient, map[string]string) (func() error, error) {
-	return func(ctx context.Context, rt event.APIClient, _ map[string]string) (func() error, error) {
+func subscriptionPreConsume(eventType, subscribePath, unsubscribePath string) func(context.Context, event.APIClient, map[string]string) (func(), error) {
+	return func(ctx context.Context, rt event.APIClient, _ map[string]string) (func(), error) {
 		if rt == nil {
-			return nil, errs.NewInternalError(errs.SubtypeUnknown,
-				"runtime API client is required for pre-consume subscription")
+			return nil, fmt.Errorf("runtime API client is required for pre-consume subscription")
 		}

 		body := map[string]string{"event_type": eventType}
@@ -25,13 +24,10 @@ func subscriptionPreConsume(eventType, subscribePath, unsubscribePath string) fu
 			return nil, err
 		}

-		return func() error {
+		return func() {
 			cleanupCtx, cancel := context.WithTimeout(context.Background(), cleanupTimeout)
 			defer cancel()
-			if _, err := rt.CallAPI(cleanupCtx, "POST", unsubscribePath, body); err != nil {
-				return err
-			}
-			return nil
+			_, _ = rt.CallAPI(cleanupCtx, "POST", unsubscribePath, body)
 		}, nil
 	}
 }
--- a/events/vc/recording_ended.go
+++ b/events/vc/recording_ended.go
@@ -1,84 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package vc
-
-import (
-	"context"
-	"encoding/json"
-	"strconv"
-	"time"
-
-	"github.com/larksuite/cli/internal/event"
-)
-
-// VCRecordingEndedOutput is the flattened shape for vc.recording.recording_ended_v1.
-type VCRecordingEndedOutput struct {
-	Type      string `json:"type"                 desc:"Event type; always vc.recording.recording_ended_v1"`
-	EventID   string `json:"event_id,omitempty"   desc:"Globally unique event ID; safe for deduplication"`
-	EventTime string `json:"event_time,omitempty" desc:"Time when the recording ended and uploaded successfully, in RFC3339 / ISO 8601 with the current system timezone"`
-	UniqueKey string `json:"unique_key,omitempty" desc:"Unique key generated for one recording_bean recording session"`
-	Source    string `json:"source,omitempty"     desc:"Recording source; always recording_bean"`
-}
-
-type recordingEndedEnvelope struct {
-	Header struct {
-		EventID    string `json:"event_id"`
-		EventType  string `json:"event_type"`
-		CreateTime string `json:"create_time"`
-	} `json:"header"`
-	Event recordingEndedEvent `json:"event"`
-}
-
-type recordingEndedEvent struct {
-	UniqueKey string `json:"unique_key"`
-	Source    string `json:"source"`
-}
-
-func processVCRecordingEnded(_ context.Context, _ event.APIClient, raw *event.RawEvent, _ map[string]string) (json.RawMessage, error) {
-	envelope, ok := parseRecordingEndedEnvelope(raw)
-	if !ok {
-		return raw.Payload, nil
-	}
-	if !isRecordingEndedBeanEvent(envelope) {
-		return nil, nil
-	}
-	out := &VCRecordingEndedOutput{
-		Type:      recordingEndedEventType(envelope, raw),
-		EventID:   envelope.Header.EventID,
-		EventTime: recordingEndedEventTime(envelope.Header.CreateTime),
-		UniqueKey: envelope.Event.UniqueKey,
-		Source:    envelope.Event.Source,
-	}
-	return json.Marshal(out)
-}
-
-func parseRecordingEndedEnvelope(raw *event.RawEvent) (*recordingEndedEnvelope, bool) {
-	var envelope recordingEndedEnvelope
-	if err := json.Unmarshal(raw.Payload, &envelope); err != nil {
-		return nil, false
-	}
-	return &envelope, true
-}
-
-func isRecordingEndedBeanEvent(envelope *recordingEndedEnvelope) bool {
-	return envelope != nil && envelope.Event.Source == "recording_bean"
-}
-
-func recordingEndedEventType(envelope *recordingEndedEnvelope, raw *event.RawEvent) string {
-	if envelope != nil && envelope.Header.EventType != "" {
-		return envelope.Header.EventType
-	}
-	return raw.EventType
-}
-
-func recordingEndedEventTime(raw string) string {
-	if raw == "" {
-		return ""
-	}
-	millis, err := strconv.ParseInt(raw, 10, 64)
-	if err != nil {
-		return ""
-	}
-	return time.UnixMilli(millis).Local().Format(time.RFC3339)
-}
--- a/events/vc/recording_started.go
+++ b/events/vc/recording_started.go
@@ -1,84 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package vc
-
-import (
-	"context"
-	"encoding/json"
-	"strconv"
-	"time"
-
-	"github.com/larksuite/cli/internal/event"
-)
-
-// VCRecordingStartedOutput is the flattened shape for vc.recording.recording_started_v1.
-type VCRecordingStartedOutput struct {
-	Type      string `json:"type"                 desc:"Event type; always vc.recording.recording_started_v1"`
-	EventID   string `json:"event_id,omitempty"   desc:"Globally unique event ID; safe for deduplication"`
-	EventTime string `json:"event_time,omitempty" desc:"Recording start time in RFC3339 / ISO 8601 with the current system timezone"`
-	UniqueKey string `json:"unique_key,omitempty" desc:"Unique key generated for one recording_bean recording session"`
-	Source    string `json:"source,omitempty"     desc:"Recording source; always recording_bean"`
-}
-
-type recordingStartedEnvelope struct {
-	Header struct {
-		EventID    string `json:"event_id"`
-		EventType  string `json:"event_type"`
-		CreateTime string `json:"create_time"`
-	} `json:"header"`
-	Event recordingStartedEvent `json:"event"`
-}
-
-type recordingStartedEvent struct {
-	UniqueKey string `json:"unique_key"`
-	Source    string `json:"source"`
-}
-
-func processVCRecordingStarted(_ context.Context, _ event.APIClient, raw *event.RawEvent, _ map[string]string) (json.RawMessage, error) {
-	envelope, ok := parseRecordingStartedEnvelope(raw)
-	if !ok {
-		return raw.Payload, nil
-	}
-	if !isRecordingStartedBeanEvent(envelope) {
-		return nil, nil
-	}
-	out := &VCRecordingStartedOutput{
-		Type:      recordingStartedEventType(envelope, raw),
-		EventID:   envelope.Header.EventID,
-		EventTime: recordingStartedEventTime(envelope.Header.CreateTime),
-		UniqueKey: envelope.Event.UniqueKey,
-		Source:    envelope.Event.Source,
-	}
-	return json.Marshal(out)
-}
-
-func parseRecordingStartedEnvelope(raw *event.RawEvent) (*recordingStartedEnvelope, bool) {
-	var envelope recordingStartedEnvelope
-	if err := json.Unmarshal(raw.Payload, &envelope); err != nil {
-		return nil, false
-	}
-	return &envelope, true
-}
-
-func isRecordingStartedBeanEvent(envelope *recordingStartedEnvelope) bool {
-	return envelope != nil && envelope.Event.Source == "recording_bean"
-}
-
-func recordingStartedEventType(envelope *recordingStartedEnvelope, raw *event.RawEvent) string {
-	if envelope != nil && envelope.Header.EventType != "" {
-		return envelope.Header.EventType
-	}
-	return raw.EventType
-}
-
-func recordingStartedEventTime(raw string) string {
-	if raw == "" {
-		return ""
-	}
-	millis, err := strconv.ParseInt(raw, 10, 64)
-	if err != nil {
-		return ""
-	}
-	return time.UnixMilli(millis).Local().Format(time.RFC3339)
-}
--- a/events/vc/recording_test.go
+++ b/events/vc/recording_test.go
@@ -1,468 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package vc
-
-import (
-	"context"
-	"encoding/json"
-	"reflect"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/larksuite/cli/internal/event"
-)
-
-func TestVCKeys_RecordingEventsRegistered(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	for _, tc := range []struct {
-		eventType string
-	}{
-		{eventTypeRecordingStarted},
-		{eventTypeRecordingTranscriptGenerated},
-		{eventTypeRecordingEnded},
-	} {
-		t.Run(tc.eventType, func(t *testing.T) {
-			def, ok := event.Lookup(tc.eventType)
-			if !ok {
-				t.Fatalf("%s should be registered via Keys()", tc.eventType)
-			}
-			if def.Schema.Custom == nil {
-				t.Error("Processed key must set Schema.Custom")
-			}
-			if def.Schema.Native != nil {
-				t.Error("Processed key must not set Schema.Native")
-			}
-			if def.Process == nil {
-				t.Error("Process must not be nil for processed key")
-			}
-			if def.PreConsume == nil {
-				t.Error("PreConsume must not be nil for processed key")
-			}
-			if len(def.Scopes) != 1 || def.Scopes[0] != "vc:recording:read" {
-				t.Errorf("Scopes = %v", def.Scopes)
-			}
-			if len(def.AuthTypes) != 1 || def.AuthTypes[0] != "user" {
-				t.Errorf("AuthTypes = %v", def.AuthTypes)
-			}
-			if len(def.RequiredConsoleEvents) != 1 || def.RequiredConsoleEvents[0] != tc.eventType {
-				t.Errorf("RequiredConsoleEvents = %v", def.RequiredConsoleEvents)
-			}
-			if !strings.Contains(def.Description, "recording_bean") {
-				t.Errorf("Description should document recording_bean source, got %q", def.Description)
-			}
-			if !strings.Contains(def.Description, "connected to Feishu software") {
-				t.Errorf("Description should document Feishu software connection requirement, got %q", def.Description)
-			}
-			if strings.Contains(def.Description, "future") || strings.Contains(def.Description, "software_recording") {
-				t.Errorf("Description should not mention future sources, got %q", def.Description)
-			}
-			if tc.eventType == eventTypeRecordingEnded && (strings.Contains(def.Description, "object_type") || strings.Contains(def.Description, "object_id")) {
-				t.Errorf("ended Description should not document object metadata, got %q", def.Description)
-			}
-			wantSchemaType := reflect.TypeOf(VCRecordingStartedOutput{})
-			switch tc.eventType {
-			case eventTypeRecordingTranscriptGenerated:
-				wantSchemaType = reflect.TypeOf(VCRecordingTranscriptGeneratedOutput{})
-			case eventTypeRecordingEnded:
-				wantSchemaType = reflect.TypeOf(VCRecordingEndedOutput{})
-			}
-			if def.Schema.Custom.Type != wantSchemaType {
-				t.Errorf("Custom schema Type = %v, want %v", def.Schema.Custom.Type, wantSchemaType)
-			}
-		})
-	}
-}
-
-func TestProcessVCRecordingStarted(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	out := runRecordingProcess[VCRecordingStartedOutput](t, eventTypeRecordingStarted, processVCRecordingStarted, `{
-		"schema": "2.0",
-		"header": {
-			"event_id": "ev_rec_start_001",
-			"event_type": "vc.recording.recording_started_v1",
-			"create_time": "1761782400000"
-		},
-		"event": {
-			"unique_key": "recording_001",
-			"source": "recording_bean"
-		}
-	}`)
-
-	if out.Type != eventTypeRecordingStarted {
-		t.Errorf("Type = %q", out.Type)
-	}
-	if out.EventID != "ev_rec_start_001" || out.EventTime != recordingTestEventTime(1761782400000) {
-		t.Errorf("EventID/EventTime = %q/%q", out.EventID, out.EventTime)
-	}
-	if out.UniqueKey != "recording_001" || out.Source != "recording_bean" {
-		t.Errorf("UniqueKey/Source = %q/%q", out.UniqueKey, out.Source)
-	}
-}
-
-func TestProcessVCRecordingTranscriptGenerated(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	got := runRecordingProcessRaw(t, eventTypeRecordingTranscriptGenerated, processVCRecordingTranscriptGenerated, `{
-		"schema": "2.0",
-		"header": {
-			"event_id": "ev_rec_transcript_001",
-			"event_type": "vc.recording.recording_transcript_generated_v1",
-			"create_time": "1761782400100"
-		},
-		"event": {
-			"unique_key": "recording_001",
-			"source": "recording_bean",
-			"transcript_items": [
-				{
-					"speaker": {
-						"id": {
-							"open_id": "ou_0f8bf7acdf2ae69553ecbdbfbbd10a53",
-							"union_id": "on_bc03f16d781bff4178a5d11e48eb1867",
-							"user_id": null
-						},
-						"user_type": 100,
-						"user_role": 1,
-						"user_name": "Alice"
-					},
-					"text": "hello world",
-					"language": "en_us",
-					"start_time_ms": "1761782399000",
-					"end_time_ms": "1761782400000",
-					"sentence_id": "987654321"
-				},
-				{
-					"speaker": {
-						"user_name": "Bob"
-					},
-					"text": "second sentence",
-					"language": "en_us",
-					"start_time_ms": "1761782401000",
-					"end_time_ms": "1761782402000",
-					"sentence_id": "987654322"
-				}
-			]
-		}
-	}`)
-	if got == nil {
-		t.Fatal("Process output is nil")
-	}
-	var out VCRecordingTranscriptGeneratedOutput
-	if err := json.Unmarshal(got, &out); err != nil {
-		t.Fatalf("Process output is not valid JSON: %v\nraw=%s", err, string(got))
-	}
-
-	if out.Type != eventTypeRecordingTranscriptGenerated {
-		t.Errorf("Type = %q", out.Type)
-	}
-	if out.UniqueKey != "recording_001" || out.Source != "recording_bean" {
-		t.Errorf("UniqueKey/Source = %q/%q", out.UniqueKey, out.Source)
-	}
-	if out.EventTime != recordingTestEventTime(1761782400100) {
-		t.Errorf("EventTime = %q", out.EventTime)
-	}
-	if len(out.TranscriptItems) != 2 {
-		t.Fatalf("TranscriptItems len = %d, want 2", len(out.TranscriptItems))
-	}
-	item := out.TranscriptItems[0]
-	if item.SpeakerName != "Alice" || item.Text != "hello world" {
-		t.Errorf("Transcript speaker/text = %q/%q", item.SpeakerName, item.Text)
-	}
-	if item.StartTime != recordingTestEventTime(1761782399000) || item.EndTime != recordingTestEventTime(1761782400000) {
-		t.Errorf("Transcript timing = %q/%q", item.StartTime, item.EndTime)
-	}
-	if item.SentenceID != "987654321" {
-		t.Errorf("SentenceID = %q, want 987654321", item.SentenceID)
-	}
-	if out.TranscriptItems[1].SpeakerName != "Bob" || out.TranscriptItems[1].SentenceID != "987654322" {
-		t.Errorf("second transcript item = %+v", out.TranscriptItems[1])
-	}
-	itemJSON, err := json.Marshal(item)
-	if err != nil {
-		t.Fatalf("marshal transcript item: %v", err)
-	}
-	var itemFields map[string]any
-	if err := json.Unmarshal(itemJSON, &itemFields); err != nil {
-		t.Fatalf("unmarshal transcript item JSON: %v", err)
-	}
-	wantItemFields := map[string]bool{
-		"speaker_name": true,
-		"text":         true,
-		"start_time":   true,
-		"end_time":     true,
-		"sentence_id":  true,
-	}
-	for gotField := range itemFields {
-		if !wantItemFields[gotField] {
-			t.Errorf("Transcript item should not contain field %q, got %s", gotField, string(itemJSON))
-		}
-	}
-	for wantField := range wantItemFields {
-		if _, ok := itemFields[wantField]; !ok {
-			t.Errorf("Transcript item missing field %q, got %s", wantField, string(itemJSON))
-		}
-	}
-	for _, unexpected := range []string{
-		`"seq_id"`,
-		`"speaker"`,
-		`"user_open_id"`,
-		`"user_type"`,
-		`"user_role"`,
-		`"language"`,
-		`"start_time_ms"`,
-		`"end_time_ms"`,
-		`"sequence_id"`,
-		`"transcript_item"`,
-	} {
-		if strings.Contains(string(got), unexpected) {
-			t.Errorf("Transcript output should not contain %s, got %s", unexpected, string(got))
-		}
-	}
-	if !strings.Contains(string(got), `"sentence_id":"987654321"`) {
-		t.Errorf("Transcript output should contain sentence_id, got %s", string(got))
-	}
-}
-
-func TestProcessVCRecordingEnded(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	out := runRecordingProcess[VCRecordingEndedOutput](t, eventTypeRecordingEnded, processVCRecordingEnded, `{
-		"schema": "2.0",
-		"header": {
-			"event_id": "ev_rec_end_001",
-			"event_type": "vc.recording.recording_ended_v1",
-			"create_time": "1761782400200"
-		},
-		"event": {
-			"unique_key": "recording_001",
-			"source": "recording_bean",
-			"object_type": "minutes",
-			"object_id": "minute_token_001"
-		}
-	}`)
-
-	if out.Type != eventTypeRecordingEnded {
-		t.Errorf("Type = %q", out.Type)
-	}
-	if out.UniqueKey != "recording_001" || out.Source != "recording_bean" {
-		t.Errorf("UniqueKey/Source = %q/%q", out.UniqueKey, out.Source)
-	}
-	if out.EventTime != recordingTestEventTime(1761782400200) {
-		t.Errorf("EventTime = %q", out.EventTime)
-	}
-}
-
-func TestProcessVCRecordingEnded_DropsObjectMetadata(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	got := runRecordingProcessRaw(t, eventTypeRecordingEnded, processVCRecordingEnded, `{
-		"schema": "2.0",
-		"header": {
-			"event_id": "ev_rec_end_001",
-			"event_type": "vc.recording.recording_ended_v1",
-			"create_time": "1761782400200"
-		},
-		"event": {
-			"unique_key": "recording_001",
-			"source": "recording_bean",
-			"object_type": "minutes",
-			"object_id": "minute_token_001"
-		}
-	}`)
-
-	if strings.Contains(string(got), "object_type") || strings.Contains(string(got), "object_id") {
-		t.Fatalf("ended output should drop object metadata, got %s", string(got))
-	}
-}
-
-func TestProcessVCRecording_DropsTimestampField(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	got := runRecordingProcessRaw(t, eventTypeRecordingStarted, processVCRecordingStarted, `{
-		"schema": "2.0",
-		"header": {
-			"event_id": "ev_rec_start_001",
-			"event_type": "vc.recording.recording_started_v1",
-			"create_time": "1761782400000"
-		},
-		"event": {
-			"unique_key": "recording_001",
-			"source": "recording_bean"
-		}
-	}`)
-
-	if strings.Contains(string(got), `"timestamp"`) {
-		t.Fatalf("recording output should use event_time instead of timestamp, got %s", string(got))
-	}
-	if !strings.Contains(string(got), `"event_time":"`+recordingTestEventTime(1761782400000)+`"`) {
-		t.Fatalf("recording output should include ISO 8601 event_time, got %s", string(got))
-	}
-}
-
-func TestProcessVCRecording_NonRecordingBeanFiltered(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	for _, tc := range []struct {
-		name      string
-		eventType string
-		process   event.ProcessFunc
-		payload   string
-	}{
-		{
-			name:      "started",
-			eventType: eventTypeRecordingStarted,
-			process:   processVCRecordingStarted,
-			payload: `{
-				"schema": "2.0",
-				"header": {"event_id": "ev_rec_start_001", "event_type": "vc.recording.recording_started_v1"},
-				"event": {"unique_key": "recording_001", "source": "software_recording"}
-			}`,
-		},
-		{
-			name:      "transcript",
-			eventType: eventTypeRecordingTranscriptGenerated,
-			process:   processVCRecordingTranscriptGenerated,
-			payload: `{
-				"schema": "2.0",
-				"header": {"event_id": "ev_rec_transcript_001", "event_type": "vc.recording.recording_transcript_generated_v1"},
-				"event": {"unique_key": "recording_001", "source": "software_recording", "transcript_items": []}
-			}`,
-		},
-		{
-			name:      "ended",
-			eventType: eventTypeRecordingEnded,
-			process:   processVCRecordingEnded,
-			payload: `{
-				"schema": "2.0",
-				"header": {"event_id": "ev_rec_end_001", "event_type": "vc.recording.recording_ended_v1"},
-				"event": {"unique_key": "recording_001", "source": "software_recording"}
-			}`,
-		},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			got := runRecordingProcessRaw(t, tc.eventType, tc.process, tc.payload)
-			if got != nil {
-				t.Fatalf("non-recording_bean event should be filtered, got %s", string(got))
-			}
-		})
-	}
-}
-
-func TestProcessVCRecording_MalformedPayloadPassthrough(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	for _, tc := range []struct {
-		name      string
-		eventType string
-		process   event.ProcessFunc
-	}{
-		{name: "started", eventType: eventTypeRecordingStarted, process: processVCRecordingStarted},
-		{name: "transcript", eventType: eventTypeRecordingTranscriptGenerated, process: processVCRecordingTranscriptGenerated},
-		{name: "ended", eventType: eventTypeRecordingEnded, process: processVCRecordingEnded},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			raw := &event.RawEvent{
-				EventType: tc.eventType,
-				Payload:   json.RawMessage(`not json`),
-				Timestamp: time.Now(),
-			}
-			got, err := tc.process(context.Background(), nil, raw, nil)
-			if err != nil {
-				t.Fatalf("Process should swallow parse errors, got %v", err)
-			}
-			if string(got) != "not json" {
-				t.Errorf("malformed fallback output = %q, want original bytes", string(got))
-			}
-		})
-	}
-}
-
-func TestVCRecording_PreConsumeSubscriptionLifecycle(t *testing.T) {
-	t.Setenv("LARKSUITE_CLI_CONFIG_DIR", t.TempDir())
-
-	for _, tc := range []struct {
-		eventType string
-	}{
-		{eventTypeRecordingStarted},
-		{eventTypeRecordingTranscriptGenerated},
-		{eventTypeRecordingEnded},
-	} {
-		t.Run(tc.eventType, func(t *testing.T) {
-			def, ok := event.Lookup(tc.eventType)
-			if !ok {
-				t.Fatalf("%s should be registered via Keys()", tc.eventType)
-			}
-
-			type call struct {
-				method string
-				path   string
-				body   any
-			}
-			var calls []call
-			rt := &stubAPIClient{
-				callFn: func(_ context.Context, method, path string, body any) (json.RawMessage, error) {
-					calls = append(calls, call{method: method, path: path, body: body})
-					return json.RawMessage(`{"code":0,"msg":"success","data":{}}`), nil
-				},
-			}
-
-			cleanup, err := def.PreConsume(context.Background(), rt, nil)
-			if err != nil {
-				t.Fatalf("PreConsume error: %v", err)
-			}
-			if cleanup == nil {
-				t.Fatal("cleanup must not be nil")
-			}
-			if len(calls) != 1 {
-				t.Fatalf("calls after subscribe = %d, want 1", len(calls))
-			}
-			if calls[0].method != "POST" || calls[0].path != pathRecordingSubscribe {
-				t.Fatalf("subscribe call = %+v", calls[0])
-			}
-			assertSubscriptionRequest(t, calls[0].body, tc.eventType)
-
-			cleanup()
-			if len(calls) != 2 {
-				t.Fatalf("calls after cleanup = %d, want 2", len(calls))
-			}
-			if calls[1].method != "POST" || calls[1].path != pathRecordingUnsubscribe {
-				t.Fatalf("unsubscribe call = %+v", calls[1])
-			}
-			assertSubscriptionRequest(t, calls[1].body, tc.eventType)
-		})
-	}
-}
-
-func runRecordingProcess[T any](t *testing.T, eventType string, process event.ProcessFunc, payload string) T {
-	t.Helper()
-	got := runRecordingProcessRaw(t, eventType, process, payload)
-	if got == nil {
-		t.Fatal("Process output is nil")
-	}
-	var out T
-	if err := json.Unmarshal(got, &out); err != nil {
-		t.Fatalf("Process output is not valid JSON: %v\nraw=%s", err, string(got))
-	}
-	return out
-}
-
-func runRecordingProcessRaw(t *testing.T, eventType string, process event.ProcessFunc, payload string) json.RawMessage {
-	t.Helper()
-	raw := &event.RawEvent{
-		EventType: eventType,
-		Payload:   json.RawMessage(payload),
-		Timestamp: time.Now(),
-	}
-	got, err := process(context.Background(), nil, raw, nil)
-	if err != nil {
-		t.Fatalf("Process error: %v", err)
-	}
-	return got
-}
-
-func recordingTestEventTime(millis int64) string {
-	return time.UnixMilli(millis).Local().Format(time.RFC3339)
-}
--- a/events/vc/recording_transcript_generated.go
+++ b/events/vc/recording_transcript_generated.go
@@ -1,163 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package vc
-
-import (
-	"context"
-	"encoding/json"
-	"strconv"
-	"time"
-
-	"github.com/larksuite/cli/internal/event"
-)
-
-// VCRecordingTranscriptItemOutput is one flattened transcript item for recording events.
-type VCRecordingTranscriptItemOutput struct {
-	SpeakerName string `json:"speaker_name,omitempty" desc:"Speaker display name"`
-	Text        string `json:"text,omitempty"         desc:"Transcript text"`
-	StartTime   string `json:"start_time,omitempty"   desc:"Transcript item start time in RFC3339 / ISO 8601 with the current system timezone"`
-	EndTime     string `json:"end_time,omitempty"     desc:"Transcript item end time in RFC3339 / ISO 8601 with the current system timezone"`
-	SentenceID  string `json:"sentence_id,omitempty"  desc:"Transcript sentence ID"`
-}
-
-// VCRecordingTranscriptGeneratedOutput is the flattened shape for vc.recording.recording_transcript_generated_v1.
-type VCRecordingTranscriptGeneratedOutput struct {
-	Type            string                            `json:"type"                       desc:"Event type; always vc.recording.recording_transcript_generated_v1"`
-	EventID         string                            `json:"event_id,omitempty"         desc:"Globally unique event ID; safe for deduplication"`
-	EventTime       string                            `json:"event_time,omitempty"       desc:"Time when this batch of transcript items was generated, in RFC3339 / ISO 8601 with the current system timezone"`
-	UniqueKey       string                            `json:"unique_key,omitempty"       desc:"Unique key generated for one recording_bean recording session"`
-	Source          string                            `json:"source,omitempty"           desc:"Recording source; always recording_bean"`
-	TranscriptItems []VCRecordingTranscriptItemOutput `json:"transcript_items,omitempty" desc:"Generated transcript items"`
-}
-
-type recordingTranscriptGeneratedEnvelope struct {
-	Header struct {
-		EventID    string `json:"event_id"`
-		EventType  string `json:"event_type"`
-		CreateTime string `json:"create_time"`
-	} `json:"header"`
-	Event recordingTranscriptGeneratedEvent `json:"event"`
-}
-
-type recordingTranscriptGeneratedEvent struct {
-	UniqueKey       string                               `json:"unique_key"`
-	Source          string                               `json:"source"`
-	TranscriptItems []recordingTranscriptGeneratedItemIn `json:"transcript_items"`
-}
-
-type recordingTranscriptGeneratedItemIn struct {
-	Speaker     *recordingTranscriptGeneratedSpeakerIn `json:"speaker"`
-	Text        string                                 `json:"text"`
-	StartTimeMs recordingTranscriptGeneratedString     `json:"start_time_ms"`
-	EndTimeMs   recordingTranscriptGeneratedString     `json:"end_time_ms"`
-	SentenceID  string                                 `json:"sentence_id"`
-}
-
-type recordingTranscriptGeneratedSpeakerIn struct {
-	UserName string `json:"user_name"`
-}
-
-type recordingTranscriptGeneratedString string
-
-func processVCRecordingTranscriptGenerated(_ context.Context, _ event.APIClient, raw *event.RawEvent, _ map[string]string) (json.RawMessage, error) {
-	envelope, ok := parseRecordingTranscriptGeneratedEnvelope(raw)
-	if !ok {
-		return raw.Payload, nil
-	}
-	if !isRecordingTranscriptGeneratedBeanEvent(envelope) {
-		return nil, nil
-	}
-	out := &VCRecordingTranscriptGeneratedOutput{
-		Type:            recordingTranscriptGeneratedEventType(envelope, raw),
-		EventID:         envelope.Header.EventID,
-		EventTime:       recordingTranscriptGeneratedEventTime(envelope.Header.CreateTime),
-		UniqueKey:       envelope.Event.UniqueKey,
-		Source:          envelope.Event.Source,
-		TranscriptItems: recordingTranscriptItems(envelope.Event.TranscriptItems),
-	}
-	return json.Marshal(out)
-}
-
-func parseRecordingTranscriptGeneratedEnvelope(raw *event.RawEvent) (*recordingTranscriptGeneratedEnvelope, bool) {
-	var envelope recordingTranscriptGeneratedEnvelope
-	if err := json.Unmarshal(raw.Payload, &envelope); err != nil {
-		return nil, false
-	}
-	return &envelope, true
-}
-
-func isRecordingTranscriptGeneratedBeanEvent(envelope *recordingTranscriptGeneratedEnvelope) bool {
-	return envelope != nil && envelope.Event.Source == "recording_bean"
-}
-
-func recordingTranscriptGeneratedEventType(envelope *recordingTranscriptGeneratedEnvelope, raw *event.RawEvent) string {
-	if envelope != nil && envelope.Header.EventType != "" {
-		return envelope.Header.EventType
-	}
-	return raw.EventType
-}
-
-func recordingTranscriptGeneratedEventTime(raw string) string {
-	return recordingTranscriptGeneratedMillisToLocalRFC3339(raw)
-}
-
-func recordingTranscriptGeneratedMillisToLocalRFC3339(raw string) string {
-	if raw == "" {
-		return ""
-	}
-	millis, err := strconv.ParseInt(raw, 10, 64)
-	if err != nil {
-		return ""
-	}
-	return time.UnixMilli(millis).Local().Format(time.RFC3339)
-}
-
-func recordingTranscriptItems(items []recordingTranscriptGeneratedItemIn) []VCRecordingTranscriptItemOutput {
-	if len(items) == 0 {
-		return nil
-	}
-	out := make([]VCRecordingTranscriptItemOutput, 0, len(items))
-	for _, item := range items {
-		out = append(out, recordingTranscriptItem(item))
-	}
-	return out
-}
-
-func recordingTranscriptItem(item recordingTranscriptGeneratedItemIn) VCRecordingTranscriptItemOutput {
-	return VCRecordingTranscriptItemOutput{
-		SpeakerName: recordingSpeakerName(item.Speaker),
-		Text:        item.Text,
-		StartTime:   recordingTranscriptGeneratedMillisToLocalRFC3339(item.StartTimeMs.String()),
-		EndTime:     recordingTranscriptGeneratedMillisToLocalRFC3339(item.EndTimeMs.String()),
-		SentenceID:  item.SentenceID,
-	}
-}
-
-func recordingSpeakerName(speaker *recordingTranscriptGeneratedSpeakerIn) string {
-	if speaker == nil {
-		return ""
-	}
-	return speaker.UserName
-}
-
-func (s *recordingTranscriptGeneratedString) UnmarshalJSON(data []byte) error {
-	if string(data) == "null" {
-		return nil
-	}
-	var str string
-	if err := json.Unmarshal(data, &str); err == nil {
-		*s = recordingTranscriptGeneratedString(str)
-		return nil
-	}
-	var num json.Number
-	if err := json.Unmarshal(data, &num); err != nil {
-		return err
-	}
-	*s = recordingTranscriptGeneratedString(num.String())
-	return nil
-}
-
-func (s recordingTranscriptGeneratedString) String() string {
-	return string(s)
-}
--- a/events/vc/register.go
+++ b/events/vc/register.go
@@ -11,18 +11,13 @@ import (
 )

 const (
-	eventTypeMeetingEnded                 = "vc.meeting.participant_meeting_ended_v1"
-	eventTypeNoteGenerated                = "vc.note.generated_v1"
-	eventTypeRecordingStarted             = "vc.recording.recording_started_v1"
-	eventTypeRecordingTranscriptGenerated = "vc.recording.recording_transcript_generated_v1"
-	eventTypeRecordingEnded               = "vc.recording.recording_ended_v1"
+	eventTypeMeetingEnded  = "vc.meeting.participant_meeting_ended_v1"
+	eventTypeNoteGenerated = "vc.note.generated_v1"

-	pathMeetingSubscribe     = "/open-apis/vc/v1/meetings/subscription"
-	pathMeetingUnsubscribe   = "/open-apis/vc/v1/meetings/unsubscription"
-	pathNoteSubscribe        = "/open-apis/vc/v1/notes/subscription"
-	pathNoteUnsubscribe      = "/open-apis/vc/v1/notes/unsubscription"
-	pathRecordingSubscribe   = "/open-apis/vc/v1/recordings/subscription"
-	pathRecordingUnsubscribe = "/open-apis/vc/v1/recordings/unsubscription"
+	pathMeetingSubscribe   = "/open-apis/vc/v1/meetings/subscription"
+	pathMeetingUnsubscribe = "/open-apis/vc/v1/meetings/unsubscription"
+	pathNoteSubscribe      = "/open-apis/vc/v1/notes/subscription"
+	pathNoteUnsubscribe    = "/open-apis/vc/v1/notes/unsubscription"

 	pathNoteDetailFmt = "/open-apis/vc/v1/notes/%s"
 )
@@ -62,53 +57,5 @@ func Keys() []event.KeyDefinition {
 			},
 			RequiredConsoleEvents: []string{eventTypeNoteGenerated},
 		},
-		{
-			Key:         eventTypeRecordingStarted,
-			DisplayName: "Recording started",
-			Description: "Triggered when a recording_bean recording starts; only generated when connected to Feishu software.",
-			EventType:   eventTypeRecordingStarted,
-			Schema: event.SchemaDef{
-				Custom: &event.SchemaSpec{Type: reflect.TypeOf(VCRecordingStartedOutput{})},
-			},
-			Process:    processVCRecordingStarted,
-			PreConsume: subscriptionPreConsume(eventTypeRecordingStarted, pathRecordingSubscribe, pathRecordingUnsubscribe),
-			Scopes:     []string{"vc:recording:read"},
-			AuthTypes: []string{
-				"user",
-			},
-			RequiredConsoleEvents: []string{eventTypeRecordingStarted},
-		},
-		{
-			Key:         eventTypeRecordingTranscriptGenerated,
-			DisplayName: "Recording transcript generated",
-			Description: "Triggered when recording_bean transcript items are generated; only generated when connected to Feishu software.",
-			EventType:   eventTypeRecordingTranscriptGenerated,
-			Schema: event.SchemaDef{
-				Custom: &event.SchemaSpec{Type: reflect.TypeOf(VCRecordingTranscriptGeneratedOutput{})},
-			},
-			Process:    processVCRecordingTranscriptGenerated,
-			PreConsume: subscriptionPreConsume(eventTypeRecordingTranscriptGenerated, pathRecordingSubscribe, pathRecordingUnsubscribe),
-			Scopes:     []string{"vc:recording:read"},
-			AuthTypes: []string{
-				"user",
-			},
-			RequiredConsoleEvents: []string{eventTypeRecordingTranscriptGenerated},
-		},
-		{
-			Key:         eventTypeRecordingEnded,
-			DisplayName: "Recording ended",
-			Description: "Triggered when a recording_bean recording ends and uploads successfully; only generated when connected to Feishu software.",
-			EventType:   eventTypeRecordingEnded,
-			Schema: event.SchemaDef{
-				Custom: &event.SchemaSpec{Type: reflect.TypeOf(VCRecordingEndedOutput{})},
-			},
-			Process:    processVCRecordingEnded,
-			PreConsume: subscriptionPreConsume(eventTypeRecordingEnded, pathRecordingSubscribe, pathRecordingUnsubscribe),
-			Scopes:     []string{"vc:recording:read"},
-			AuthTypes: []string{
-				"user",
-			},
-			RequiredConsoleEvents: []string{eventTypeRecordingEnded},
-		},
 	}
 }
--- a/events/whiteboard/preconsume.go
+++ b/events/whiteboard/preconsume.go
@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/event"
 	"github.com/larksuite/cli/internal/validate"
 )
@@ -22,18 +21,14 @@ const cleanupTimeout = 5 * time.Second
 //
 // board.whiteboard.updated_v1 is subscribed per-whiteboard (by whiteboard_id),
 // so the path contains a :whiteboard_id placeholder that must be supplied via params.
-func whiteboardSubscriptionPreConsume(eventType string) func(context.Context, event.APIClient, map[string]string) (func() error, error) {
-	return func(ctx context.Context, rt event.APIClient, params map[string]string) (func() error, error) {
+func whiteboardSubscriptionPreConsume(eventType string) func(context.Context, event.APIClient, map[string]string) (func(), error) {
+	return func(ctx context.Context, rt event.APIClient, params map[string]string) (func(), error) {
 		if rt == nil {
-			return nil, errs.NewInternalError(errs.SubtypeUnknown,
-				"runtime API client is required for pre-consume subscription")
+			return nil, fmt.Errorf("runtime API client is required for pre-consume subscription")
 		}
 		whiteboardID := params["whiteboard_id"]
 		if whiteboardID == "" {
-			return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
-				"param whiteboard_id is required for %s", eventType).
-				WithParam("--param").
-				WithHint("pass it as --param whiteboard_id=<id>; run `lark-cli event schema %s` for details", eventType)
+			return nil, fmt.Errorf("param whiteboard_id is required for %s", eventType)
 		}
 		encoded := validate.EncodePathSegment(whiteboardID)
 		subscribePath := fmt.Sprintf("/open-apis/board/v1/whiteboards/%s/subscribe", encoded)
@@ -44,13 +39,10 @@ func whiteboardSubscriptionPreConsume(eventType string) func(context.Context, ev
 			return nil, err
 		}

-		return func() error {
+		return func() {
 			cleanupCtx, cancel := context.WithTimeout(context.Background(), cleanupTimeout)
 			defer cancel()
-			if _, err := rt.CallAPI(cleanupCtx, "POST", unsubscribePath, body); err != nil {
-				return err
-			}
-			return nil
+			_, _ = rt.CallAPI(cleanupCtx, "POST", unsubscribePath, body)
 		}, nil
 	}
 }
--- a/events/whiteboard/preconsume_test.go
+++ b/events/whiteboard/preconsume_test.go
@@ -11,7 +11,6 @@ import (
 	"sync"
 	"testing"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/event"
 )

@@ -59,16 +58,6 @@ func TestWhiteboardSubscriptionPreConsume_MissingWhiteboardID(t *testing.T) {
 	if !strings.Contains(err.Error(), "whiteboard_id") {
 		t.Fatalf("error should mention whiteboard_id, got: %v", err)
 	}
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Subtype != errs.SubtypeInvalidArgument || ve.Param != "--param" {
-		t.Errorf("subtype/param = %s/%q, want %s/%q", ve.Subtype, ve.Param, errs.SubtypeInvalidArgument, "--param")
-	}
-	if ve.Hint == "" {
-		t.Error("missing whiteboard_id should carry a hint")
-	}
 }

 // TestWhiteboardSubscriptionPreConsume_NilRuntime verifies that PreConsume
@@ -81,9 +70,6 @@ func TestWhiteboardSubscriptionPreConsume_NilRuntime(t *testing.T) {
 	if err == nil {
 		t.Fatalf("expected error when runtime client is nil")
 	}
-	if p, ok := errs.ProblemOf(err); !ok || p.Category != errs.CategoryInternal {
-		t.Errorf("nil-runtime invariant should be a typed internal error, got %T: %v", err, err)
-	}
 }

 // TestWhiteboardSubscriptionPreConsume_SubscribeError verifies that a
--- a/internal/auth/device_flow.go
+++ b/internal/auth/device_flow.go
@@ -47,7 +47,6 @@ type DeviceFlowResult struct {
 // OAuthEndpoints contains the OAuth endpoint URLs.
 type OAuthEndpoints struct {
 	DeviceAuthorization string
-	Revoke              string
 	Token               string
 }

@@ -56,7 +55,6 @@ func ResolveOAuthEndpoints(brand core.LarkBrand) OAuthEndpoints {
 	ep := core.ResolveEndpoints(brand)
 	return OAuthEndpoints{
 		DeviceAuthorization: ep.Accounts + PathDeviceAuthorization,
-		Revoke:              ep.Accounts + PathOAuthRevoke,
 		Token:               ep.Open + PathOAuthTokenV2,
 	}
 }
--- a/internal/auth/device_flow_test.go
+++ b/internal/auth/device_flow_test.go
@@ -31,9 +31,6 @@ func TestResolveOAuthEndpoints_Feishu(t *testing.T) {
 	if ep.DeviceAuthorization != "https://accounts.feishu.cn/oauth/v1/device_authorization" {
 		t.Errorf("DeviceAuthorization = %q", ep.DeviceAuthorization)
 	}
-	if ep.Revoke != "https://accounts.feishu.cn/oauth/v1/revoke" {
-		t.Errorf("Revoke = %q", ep.Revoke)
-	}
 	if ep.Token != "https://open.feishu.cn/open-apis/authen/v2/oauth/token" {
 		t.Errorf("Token = %q", ep.Token)
 	}
@@ -45,9 +42,6 @@ func TestResolveOAuthEndpoints_Lark(t *testing.T) {
 	if ep.DeviceAuthorization != "https://accounts.larksuite.com/oauth/v1/device_authorization" {
 		t.Errorf("DeviceAuthorization = %q", ep.DeviceAuthorization)
 	}
-	if ep.Revoke != "https://accounts.larksuite.com/oauth/v1/revoke" {
-		t.Errorf("Revoke = %q", ep.Revoke)
-	}
 	if ep.Token != "https://open.larksuite.com/open-apis/authen/v2/oauth/token" {
 		t.Errorf("Token = %q", ep.Token)
 	}
--- a/internal/auth/paths.go
+++ b/internal/auth/paths.go
@@ -7,8 +7,6 @@ package auth
 const (
 	// PathDeviceAuthorization is the endpoint for device authorization.
 	PathDeviceAuthorization = "/oauth/v1/device_authorization"
-	// PathOAuthRevoke is the endpoint for revoking an OAuth token.
-	PathOAuthRevoke = "/oauth/v1/revoke"
 	// PathAppRegistration is the endpoint for application registration.
 	PathAppRegistration = "/oauth/v1/app/registration"
 	// PathOAuthTokenV2 is the endpoint for requesting an OAuth token (v2).
--- a/internal/auth/revoke.go
+++ b/internal/auth/revoke.go
@@ -1,131 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package auth
-
-import (
-	"encoding/json"
-	"errors"
-	"io"
-	"net/http"
-	"net/url"
-	"strings"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/core"
-)
-
-// RevokeToken revokes a previously issued OAuth token.
-func RevokeToken(httpClient *http.Client, appId, appSecret string, brand core.LarkBrand, token, tokenTypeHint string) error {
-	endpoints := ResolveOAuthEndpoints(brand)
-
-	form := url.Values{}
-	form.Set("client_id", appId)
-	form.Set("client_secret", appSecret)
-	form.Set("token", token)
-	if tokenTypeHint != "" {
-		form.Set("token_type_hint", tokenTypeHint)
-	}
-
-	req, err := http.NewRequest(http.MethodPost, endpoints.Revoke, strings.NewReader(form.Encode()))
-	if err != nil {
-		return errs.NewInternalError(errs.SubtypeUnknown, "token revoke request creation failed: %v", err).WithCause(err)
-	}
-	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
-
-	resp, err := httpClient.Do(req)
-	if err != nil {
-		return errs.NewNetworkError(errs.SubtypeNetworkTransport, "token revoke transport error: %v", err).WithCause(err)
-	}
-	defer resp.Body.Close()
-	logHTTPResponse(resp)
-
-	body, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return errs.NewInternalError(errs.SubtypeInvalidResponse, "token revoke read error: %v", err).WithCause(err)
-	}
-
-	if resp.StatusCode >= 400 {
-		return revokeHTTPStatusError(resp.StatusCode, body)
-	}
-
-	if len(body) == 0 {
-		return nil
-	}
-
-	var data map[string]interface{}
-	if err := json.Unmarshal(body, &data); err != nil {
-		return nil
-	}
-
-	if code := getInt(data, "code", 0); code != 0 {
-		msg := getStr(data, "msg")
-		if msg == "" {
-			msg = getStr(data, "message")
-		}
-		if msg == "" {
-			msg = "unknown error"
-		}
-		return errs.NewAPIError(errs.SubtypeUnknown, "token revoke failed [%d]: %s", code, msg).
-			WithCode(code).
-			WithCause(errors.New(msg))
-	}
-
-	if errStr := getStr(data, "error"); errStr != "" {
-		msg := getStr(data, "error_description")
-		if msg == "" {
-			msg = errStr
-		}
-		return errs.NewAPIError(errs.SubtypeUnknown, "token revoke failed: %s", msg).
-			WithCause(errors.New(msg))
-	}
-
-	return nil
-}
-
-func revokeHTTPStatusError(status int, body []byte) error {
-	msg := formatOAuthErrorBody(body)
-	cause := errors.New(strings.TrimSpace(string(body)))
-	if strings.TrimSpace(string(body)) == "" {
-		cause = errors.New(msg)
-	}
-	if status >= http.StatusInternalServerError {
-		return errs.NewNetworkError(errs.SubtypeNetworkServer, "token revoke failed: HTTP %d: %s", status, msg).
-			WithCode(status).
-			WithRetryable().
-			WithCause(cause)
-	}
-	subtype := errs.SubtypeUnknown
-	if status == http.StatusNotFound {
-		subtype = errs.SubtypeNotFound
-	}
-	return errs.NewAPIError(subtype, "token revoke failed: HTTP %d: %s", status, msg).
-		WithCode(status).
-		WithCause(cause)
-}
-
-func formatOAuthErrorBody(body []byte) string {
-	trimmed := strings.TrimSpace(string(body))
-	if trimmed == "" {
-		return "empty response"
-	}
-
-	var data map[string]interface{}
-	if err := json.Unmarshal(body, &data); err != nil {
-		return trimmed
-	}
-
-	if msg := getStr(data, "error_description"); msg != "" {
-		return msg
-	}
-	if msg := getStr(data, "msg"); msg != "" {
-		return msg
-	}
-	if msg := getStr(data, "message"); msg != "" {
-		return msg
-	}
-	if msg := getStr(data, "error"); msg != "" {
-		return msg
-	}
-	return trimmed
-}
--- a/internal/auth/revoke_test.go
+++ b/internal/auth/revoke_test.go
@@ -1,207 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package auth
-
-import (
-	"errors"
-	"net/http"
-	"net/url"
-	"strings"
-	"testing"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/core"
-	"github.com/larksuite/cli/internal/httpmock"
-)
-
-type revokeRoundTripFunc func(*http.Request) (*http.Response, error)
-
-func (fn revokeRoundTripFunc) RoundTrip(req *http.Request) (*http.Response, error) {
-	return fn(req)
-}
-
-type errReadCloser struct {
-	err error
-}
-
-func (r errReadCloser) Read(_ []byte) (int, error) {
-	return 0, r.err
-}
-
-func (r errReadCloser) Close() error {
-	return nil
-}
-
-func TestRevokeToken_PostsExpectedForm(t *testing.T) {
-	reg := &httpmock.Registry{}
-	t.Cleanup(func() { reg.Verify(t) })
-
-	stub := &httpmock.Stub{
-		Method: "POST",
-		URL:    PathOAuthRevoke,
-		Body:   map[string]interface{}{"code": 0},
-		BodyFilter: func(body []byte) bool {
-			values, err := url.ParseQuery(string(body))
-			if err != nil {
-				return false
-			}
-			return values.Get("client_id") == "cli_a" &&
-				values.Get("client_secret") == "secret_b" &&
-				values.Get("token") == "user-access-token" &&
-				values.Get("token_type_hint") == "access_token"
-		},
-	}
-	reg.Register(stub)
-
-	err := RevokeToken(httpmock.NewClient(reg), "cli_a", "secret_b", core.BrandFeishu, "user-access-token", "access_token")
-	if err != nil {
-		t.Fatalf("RevokeToken() error = %v", err)
-	}
-	if got := stub.CapturedHeaders.Get("Content-Type"); got != "application/x-www-form-urlencoded" {
-		t.Fatalf("Content-Type = %q", got)
-	}
-}
-
-func TestRevokeToken_DoFailureReturnsTypedNetworkError(t *testing.T) {
-	sentinel := errors.New("transport down")
-	httpClient := &http.Client{
-		Transport: revokeRoundTripFunc(func(req *http.Request) (*http.Response, error) {
-			return nil, sentinel
-		}),
-	}
-
-	err := RevokeToken(httpClient, "cli_a", "secret_b", core.BrandFeishu, "user-access-token", "access_token")
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed error, got %T", err)
-	}
-	if p.Category != errs.CategoryNetwork || p.Subtype != errs.SubtypeNetworkTransport {
-		t.Fatalf("problem = %#v, want network/transport", p)
-	}
-	if !errors.Is(err, sentinel) {
-		t.Fatalf("expected cause %v to be preserved, got %v", sentinel, err)
-	}
-}
-
-func TestRevokeToken_ReportsHTTPError(t *testing.T) {
-	reg := &httpmock.Registry{}
-	t.Cleanup(func() { reg.Verify(t) })
-
-	reg.Register(&httpmock.Stub{
-		Method: "POST",
-		URL:    PathOAuthRevoke,
-		Status: 400,
-		Body:   map[string]interface{}{"error": "invalid_token"},
-	})
-
-	err := RevokeToken(httpmock.NewClient(reg), "cli_a", "secret_b", core.BrandFeishu, "user-access-token", "access_token")
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed error, got %T", err)
-	}
-	if p.Category != errs.CategoryAPI || p.Code != 400 {
-		t.Fatalf("problem = %#v, want api error with HTTP 400", p)
-	}
-	if !strings.Contains(err.Error(), "invalid_token") {
-		t.Fatalf("expected invalid_token error, got %v", err)
-	}
-}
-
-func TestRevokeToken_ReportsOAuthCodeErrorAsTypedAPIError(t *testing.T) {
-	reg := &httpmock.Registry{}
-	t.Cleanup(func() { reg.Verify(t) })
-
-	reg.Register(&httpmock.Stub{
-		Method: "POST",
-		URL:    PathOAuthRevoke,
-		Body: map[string]interface{}{
-			"code": 12345,
-			"msg":  "invalid revoke state",
-		},
-	})
-
-	err := RevokeToken(httpmock.NewClient(reg), "cli_a", "secret_b", core.BrandFeishu, "user-access-token", "access_token")
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed error, got %T", err)
-	}
-	if p.Category != errs.CategoryAPI || p.Code != 12345 {
-		t.Fatalf("problem = %#v, want api error with code 12345", p)
-	}
-	if !strings.Contains(err.Error(), "invalid revoke state") {
-		t.Fatalf("expected oauth error message, got %v", err)
-	}
-}
-
-func TestRevokeToken_ReportsOAuthErrorFieldAsTypedAPIError(t *testing.T) {
-	reg := &httpmock.Registry{}
-	t.Cleanup(func() { reg.Verify(t) })
-
-	reg.Register(&httpmock.Stub{
-		Method: "POST",
-		URL:    PathOAuthRevoke,
-		Body: map[string]interface{}{
-			"error":             "invalid_token",
-			"error_description": "token already expired",
-		},
-	})
-
-	err := RevokeToken(httpmock.NewClient(reg), "cli_a", "secret_b", core.BrandFeishu, "user-access-token", "access_token")
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed error, got %T", err)
-	}
-	if p.Category != errs.CategoryAPI {
-		t.Fatalf("problem = %#v, want api error", p)
-	}
-	if !strings.Contains(err.Error(), "token already expired") {
-		t.Fatalf("expected oauth error_description, got %v", err)
-	}
-}
-
-func TestRevokeToken_ReadFailureReturnsTypedInternalError(t *testing.T) {
-	sentinel := errors.New("read failed")
-	httpClient := &http.Client{
-		Transport: revokeRoundTripFunc(func(req *http.Request) (*http.Response, error) {
-			return &http.Response{
-				StatusCode: http.StatusOK,
-				Body:       errReadCloser{err: sentinel},
-				Header:     make(http.Header),
-			}, nil
-		}),
-	}
-
-	err := RevokeToken(httpClient, "cli_a", "secret_b", core.BrandFeishu, "user-access-token", "access_token")
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	p, ok := errs.ProblemOf(err)
-	if !ok {
-		t.Fatalf("expected typed error, got %T", err)
-	}
-	if p.Category != errs.CategoryInternal || p.Subtype != errs.SubtypeInvalidResponse {
-		t.Fatalf("problem = %#v, want internal/invalid_response", p)
-	}
-	if !errors.Is(err, sentinel) {
-		t.Fatalf("expected cause %v to be preserved, got %v", sentinel, err)
-	}
-	if !strings.Contains(err.Error(), "token revoke read error") {
-		t.Fatalf("expected read error message, got %v", err)
-	}
-	if _, ok := err.(*errs.InternalError); !ok {
-		t.Fatalf("expected *errs.InternalError, got %T", err)
-	}
-}
--- a/internal/cmdutil/factory.go
+++ b/internal/cmdutil/factory.go
@@ -6,7 +6,6 @@ package cmdutil
 import (
 	"context"
 	"io"
-	"io/fs"
 	"net/http"
 	"strings"

@@ -44,8 +43,6 @@ type Factory struct {
 	Credential *credential.CredentialProvider

 	FileIOProvider fileio.Provider // file transfer provider (default: local filesystem)
-
-	SkillContent fs.FS // embedded skill tree (rooted at the skill list); nil when the build embeds no skills
 }

 // ResolveFileIO resolves a FileIO instance using the current execution context.
--- a/internal/core/types.go
+++ b/internal/core/types.go
@@ -22,12 +22,6 @@ func ParseBrand(value string) LarkBrand {
 	return BrandFeishu
 }

-// OAuthTokenV3Path is the unified OAuth 2.0 Token Endpoint path on the accounts
-// domain. It serves every grant type (client_credentials for TAT,
-// authorization_code / device_code / refresh_token for UAT) and replaces the
-// legacy per-token endpoints (e.g. /open-apis/auth/v3/tenant_access_token/internal).
-const OAuthTokenV3Path = "/oauth/v3/token"
-
 // Endpoints holds resolved endpoint URLs for different Lark services.
 type Endpoints struct {
 	Open     string // e.g. "https://open.feishu.cn"
--- a/internal/core/types_test.go
+++ b/internal/core/types_test.go
@@ -42,11 +42,6 @@ func TestResolveEndpoints_EmptyDefaultsToFeishu(t *testing.T) {
 	if ep.Open != "https://open.feishu.cn" {
 		t.Errorf("Open = %q, want feishu.cn for empty brand", ep.Open)
 	}
-	// The unified OAuth v3 Token Endpoint mints TAT on the accounts domain;
-	// pin the default-brand host so a stray non-production domain revert is caught.
-	if ep.Accounts != "https://accounts.feishu.cn" {
-		t.Errorf("Accounts = %q, want accounts.feishu.cn for empty brand", ep.Accounts)
-	}
 }

 func TestResolveOpenBaseURL(t *testing.T) {
--- a/internal/credential/default_provider.go
+++ b/internal/credential/default_provider.go
@@ -19,44 +19,33 @@ import (
 	extcred "github.com/larksuite/cli/extension/credential"
 )

-// classifyTATResponseCode wraps a deterministic (non-transient) failure from the
-// unified Token Endpoint into the canonical typed errs.* error. The v3 endpoint
-// reports failures using the OAuth 2.0 model — an `error` string plus an
-// optional numeric `code` — instead of the legacy `{code, msg}` shape.
+// classifyTATResponseCode wraps a non-zero TAT endpoint response code into the
+// canonical typed error. The TAT mint endpoint reports invalid credentials
+// with two distinct codes:
 //
-// invalid_client / unauthorized_client mean the configured app_id/app_secret
-// cannot mint a token; from the user's perspective that is the same actionable
-// CategoryConfig/InvalidClient failure the legacy 10003/10014 codes produced.
-// Every other deterministic error falls through to BuildAPIError, which still
-// yields a typed error so probe callers (errs.IsTyped) surface it rather than
-// swallowing it. Transient/server-side failures (5xx / server_error) are
-// filtered out by FetchTAT before this is called, so they stay untyped.
-func classifyTATResponseCode(code int, oauthErr, errDesc, brand, appID string) error {
-	msg := errDesc
-	if msg == "" {
-		msg = oauthErr
-	}
-	switch oauthErr {
-	case "invalid_client", "unauthorized_client":
+//   - 10003: bad app_id format or non-existent app_id ("invalid param")
+//   - 10014: invalid app_secret ("app secret invalid")
+//
+// Both surface as CategoryConfig/InvalidClient from the user's perspective —
+// the configured credentials cannot mint a tenant access token. 10014 is
+// globally mapped in codemeta (TAT-mint-specific variant of OAuth 99991543).
+// 10003 is NOT globally mapped because in other Lark endpoints it carries
+// unrelated semantics (e.g. task API uses 10003 for permission denied), so
+// the override stays local to this TAT call site instead of leaking into the
+// shared codemeta table.
+func classifyTATResponseCode(code int, msg, brand, appID string) error {
+	if code == 10003 {
 		return errs.NewConfigError(errs.SubtypeInvalidClient, "%s", msg).
 			WithCode(code).
 			WithHint("%s", errclass.ConfigHint(errs.SubtypeInvalidClient))
 	}
-	if err := errclass.BuildAPIError(map[string]any{
+	return errclass.BuildAPIError(map[string]any{
 		"code": code,
 		"msg":  msg,
 	}, errclass.ClassifyContext{
 		Brand: brand,
 		AppID: appID,
-	}); err != nil {
-		return err
-	}
-	// BuildAPIError returns nil for code 0 (Feishu's success convention), but this
-	// function is only reached once FetchTAT has ruled out success — a non-credential
-	// OAuth error (e.g. invalid_scope) can arrive with code 0 and is still a
-	// deterministic rejection. Back it with a typed APIError so callers never receive
-	// the ("", nil) "empty token, no error" pair.
-	return errs.NewAPIError(errs.SubtypeUnknown, "%s", msg).WithCode(code)
+	})
 }

 // DefaultAccountProvider resolves account from config.json via keychain.
@@ -157,8 +146,8 @@ func (p *DefaultTokenProvider) resolveUAT(ctx context.Context) (*TokenResult, er
 	return &TokenResult{Token: token, Scopes: scopes}, nil
 }

-// resolveTAT resolves a tenant access token. The result is cached after the first
-// call via sync.Once — only the context from the first call is used.
+// resolveTAT resolves a tenant access token. Result is cached after first call.
+// NOTE: Uses sync.Once — only the context from the first call is used.
 func (p *DefaultTokenProvider) resolveTAT(ctx context.Context) (*TokenResult, error) {
 	p.tatOnce.Do(func() {
 		p.tatResult, p.tatErr = p.doResolveTAT(ctx)
--- a/internal/credential/default_provider_test.go
+++ b/internal/credential/default_provider_test.go
@@ -19,16 +19,18 @@ func TestDefaultAccountProvider_Implements(t *testing.T) {
 	var _ DefaultAccountResolver = &DefaultAccountProvider{}
 }

-// TestClassifyTATResponseCode_InvalidClient_MapsToInvalidClient pins that the
-// unified Token Endpoint's OAuth2 invalid_client error surfaces as
-// CategoryConfig/InvalidClient — the configured app_id/app_secret cannot mint a
-// tenant access token, the same actionable failure the legacy 10003/10014 codes
-// produced. The numeric code is intentionally not asserted: the v3 endpoint may
-// return invalid_client with no Lark code (code defaults to 0).
-func TestClassifyTATResponseCode_InvalidClient_MapsToInvalidClient(t *testing.T) {
-	err := classifyTATResponseCode(0, "invalid_client", "client authentication failed", "feishu", "cli_app_x")
+// TestClassifyTATResponseCode_10003_MapsToInvalidClient pins that the TAT
+// endpoint's "invalid param" code surfaces as CategoryConfig/InvalidClient.
+// Reason: a bad or non-existent app_id triggers 10003 on the TAT mint endpoint,
+// which from the user's perspective is the same actionable failure as 10014
+// ("app secret invalid") — both mean the configured credentials cannot mint a
+// tenant access token. The global codemeta intentionally does not map 10003
+// because in other Lark endpoints 10003 carries unrelated semantics (e.g. task
+// API uses it for permission denied), so the override is local to this site.
+func TestClassifyTATResponseCode_10003_MapsToInvalidClient(t *testing.T) {
+	err := classifyTATResponseCode(10003, "invalid param", "feishu", "cli_app_x")
 	if err == nil {
-		t.Fatal("expected non-nil error for invalid_client")
+		t.Fatal("expected non-nil error for code=10003")
 	}
 	var cfgErr *errs.ConfigError
 	if !errors.As(err, &cfgErr) {
@@ -40,16 +42,22 @@ func TestClassifyTATResponseCode_InvalidClient_MapsToInvalidClient(t *testing.T)
 	if cfgErr.Subtype != errs.SubtypeInvalidClient {
 		t.Errorf("Subtype = %q, want %q", cfgErr.Subtype, errs.SubtypeInvalidClient)
 	}
+	if cfgErr.Code != 10003 {
+		t.Errorf("Code = %d, want 10003", cfgErr.Code)
+	}
 	if cfgErr.Hint == "" {
 		t.Error("Hint must be non-empty so the user gets a recovery action")
 	}
 }

-// TestClassifyTATResponseCode_UnauthorizedClient_MapsToInvalidClient pins that
-// unauthorized_client is treated as the same credential failure as
-// invalid_client.
-func TestClassifyTATResponseCode_UnauthorizedClient_MapsToInvalidClient(t *testing.T) {
-	err := classifyTATResponseCode(0, "unauthorized_client", "client not authorized", "feishu", "cli_app_x")
+// TestClassifyTATResponseCode_10014_RoutesViaCodeMeta pins that 10014 still
+// goes through the global BuildAPIError path (codemeta entry) so the override
+// for 10003 does not regress the existing mapping.
+func TestClassifyTATResponseCode_10014_RoutesViaCodeMeta(t *testing.T) {
+	err := classifyTATResponseCode(10014, "app secret invalid", "feishu", "cli_app_x")
+	if err == nil {
+		t.Fatal("expected non-nil error for code=10014")
+	}
 	var cfgErr *errs.ConfigError
 	if !errors.As(err, &cfgErr) {
 		t.Fatalf("expected *errs.ConfigError, got %T: %v", err, err)
@@ -57,38 +65,21 @@ func TestClassifyTATResponseCode_UnauthorizedClient_MapsToInvalidClient(t *testi
 	if cfgErr.Subtype != errs.SubtypeInvalidClient {
 		t.Errorf("Subtype = %q, want %q", cfgErr.Subtype, errs.SubtypeInvalidClient)
 	}
-}
-
-// TestClassifyTATResponseCode_OtherErrorFallsThrough pins that OAuth errors
-// outside the credential set fall through to the generic BuildAPIError fallback
-// — still typed, but not a ConfigError. The mapping is narrow and intentional.
-func TestClassifyTATResponseCode_OtherErrorFallsThrough(t *testing.T) {
-	err := classifyTATResponseCode(20068, "invalid_scope", "unauthorized scope", "feishu", "cli_app_x")
-	if err == nil {
-		t.Fatal("expected non-nil error for invalid_scope")
-	}
-	var cfgErr *errs.ConfigError
-	if errors.As(err, &cfgErr) {
-		t.Fatalf("invalid_scope must not be classified as ConfigError, got %T", err)
+	if cfgErr.Code != 10014 {
+		t.Errorf("Code = %d, want 10014", cfgErr.Code)
 	}
 }

-// TestClassifyTATResponseCode_CodeZeroOtherError_StillTyped pins the code-0
-// backstop: a non-credential OAuth error (e.g. invalid_scope) that arrives with no
-// numeric code (code 0) must still produce a non-nil typed error. BuildAPIError
-// returns nil for code 0 (Feishu's success convention); without the backstop,
-// FetchTAT would surface this deterministic rejection as ("", nil) — an empty token
-// with no error.
-func TestClassifyTATResponseCode_CodeZeroOtherError_StillTyped(t *testing.T) {
-	err := classifyTATResponseCode(0, "invalid_scope", "the requested scope is not granted", "feishu", "cli_app_x")
+// TestClassifyTATResponseCode_UnknownCodeFallsThrough pins that codes outside
+// the credential set fall through to the generic BuildAPIError fallback
+// (CategoryAPI/SubtypeUnknown) — the override is narrow and intentional.
+func TestClassifyTATResponseCode_UnknownCodeFallsThrough(t *testing.T) {
+	err := classifyTATResponseCode(99999999, "some unknown failure", "feishu", "cli_app_x")
 	if err == nil {
-		t.Fatal("expected non-nil error for code-0 invalid_scope (must not be swallowed as success)")
-	}
-	if !errs.IsTyped(err) {
-		t.Fatalf("expected a typed errs.* error, got %T %v", err, err)
+		t.Fatal("expected non-nil error for unmapped code")
 	}
 	var cfgErr *errs.ConfigError
 	if errors.As(err, &cfgErr) {
-		t.Fatalf("code-0 invalid_scope must not be a ConfigError, got %T", err)
+		t.Fatalf("unmapped code must not be classified as ConfigError, got %T", err)
 	}
 }
--- a/internal/credential/tat_fetch.go
+++ b/internal/credential/tat_fetch.go
@@ -4,47 +4,46 @@
 package credential

 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
-	"io"
 	"net/http"
-	"net/url"
-	"strings"

 	"github.com/larksuite/cli/internal/core"
 )

-// FetchTAT performs a single HTTP POST to mint a tenant access token via the
-// unified OAuth 2.0 Token Endpoint ({accounts}/oauth/v3/token) using the
-// client_credentials grant with client_secret_post authentication. It does not
-// read configuration or keychain, so callers that already hold plaintext
-// credentials (e.g. the post-`config init` probe) can validate them without a
-// second keychain round-trip.
+// FetchTAT performs a single HTTP POST to mint a tenant access token with the
+// given credentials. It does not read configuration or keychain, so callers
+// that already hold plaintext credentials (e.g. the post-`config init` probe)
+// can validate them without a second keychain round-trip.
 //
-// A deterministic client-side rejection (e.g. invalid_client) returns the
-// canonical typed error from classifyTATResponseCode — the SAME classification
-// doResolveTAT (and thus every token-resolving command) produces, so callers
-// see one consistent envelope. Transport failures, unreadable/unparseable
-// bodies, and transient server-side failures (5xx / server_error) are returned
-// raw (untyped), leaving them ambiguous; a caller can use errs.IsTyped to tell a
-// deterministic credential rejection apart from upstream/transport noise.
+// A non-zero TAT response code means the server inspected the payload and
+// rejected the credentials; FetchTAT returns the canonical typed error from
+// classifyTATResponseCode — the SAME classification doResolveTAT (and thus
+// every token-resolving command) produces, so callers see one consistent
+// envelope (CategoryConfig / SubtypeInvalidClient for 10003 / 10014, etc.).
+// Transport, HTTP-status and JSON-parse failures are returned raw (untyped),
+// leaving them ambiguous; a caller can use errs.IsTyped to tell a deterministic
+// credential rejection apart from upstream/transport noise.
 //
 // The caller owns the context timeout.
 func FetchTAT(ctx context.Context, httpClient *http.Client, brand core.LarkBrand, appID, appSecret string) (string, error) {
 	ep := core.ResolveEndpoints(brand)
-	endpoint := ep.Accounts + core.OAuthTokenV3Path
+	url := ep.Open + "/open-apis/auth/v3/tenant_access_token/internal"

-	form := url.Values{}
-	form.Set("grant_type", "client_credentials")
-	form.Set("client_id", appID)
-	form.Set("client_secret", appSecret)
-
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, strings.NewReader(form.Encode()))
+	body, err := json.Marshal(map[string]string{
+		"app_id":     appID,
+		"app_secret": appSecret,
+	})
+	if err != nil {
+		return "", fmt.Errorf("failed to marshal TAT request: %w", err)
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
 	if err != nil {
 		return "", err
 	}
-	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.Header.Set("Content-Type", "application/json")

 	resp, err := httpClient.Do(req)
 	if err != nil {
@@ -52,51 +51,20 @@ func FetchTAT(ctx context.Context, httpClient *http.Client, brand core.LarkBrand
 	}
 	defer resp.Body.Close()

-	body, err := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
-	if err != nil {
-		return "", fmt.Errorf("failed to read TAT response: %w", err)
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("TAT API returned HTTP %d", resp.StatusCode)
 	}

 	var result struct {
-		Code             int    `json:"code"`
-		AccessToken      string `json:"access_token"`
-		Error            string `json:"error"`
-		ErrorDescription string `json:"error_description"`
-		Msg              string `json:"msg"`
+		Code              int    `json:"code"`
+		Msg               string `json:"msg"`
+		TenantAccessToken string `json:"tenant_access_token"`
 	}
-	if err := json.Unmarshal(body, &result); err != nil {
-		// An unparseable body is ambiguous (covers non-JSON error pages and
-		// truncated payloads); stay untyped so probe callers treat it as noise.
-		return "", fmt.Errorf("failed to parse TAT response (HTTP %d): %w", resp.StatusCode, err)
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return "", fmt.Errorf("failed to parse TAT response: %w", err)
 	}
-
-	if result.Code == 0 && result.AccessToken != "" {
-		return result.AccessToken, nil
+	if result.Code != 0 {
+		return "", classifyTATResponseCode(result.Code, result.Msg, string(brand), appID)
 	}
-
-	// Transient/server-side failures stay untyped so probe callers stay silent and
-	// retryers can back off; only deterministic client rejections are typed. Covers
-	// 5xx, HTTP 429 rate-limit, and the OAuth transient error strings (server_error,
-	// temporarily_unavailable, slow_down) — matching the legacy "non-2xx is noise"
-	// behavior so a rate-limited probe is not surfaced as a hard credential error.
-	if resp.StatusCode >= 500 || resp.StatusCode == http.StatusTooManyRequests ||
-		result.Error == "server_error" || result.Error == "temporarily_unavailable" ||
-		result.Error == "slow_down" {
-		return "", fmt.Errorf("TAT endpoint transient failure (HTTP %d, code=%d, error=%q): %s",
-			resp.StatusCode, result.Code, result.Error, result.ErrorDescription)
-	}
-
-	// A 2xx with neither token nor error is a malformed success — ambiguous, untyped.
-	if result.Code == 0 && result.Error == "" {
-		return "", fmt.Errorf("TAT response missing access_token (HTTP %d)", resp.StatusCode)
-	}
-
-	// Prefer the OAuth error_description; fall back to the legacy Lark `msg` so a
-	// gateway-level {code, msg} response (carrying no OAuth fields) still yields a
-	// non-empty typed message instead of a bare "API error: [code]".
-	desc := result.ErrorDescription
-	if desc == "" {
-		desc = result.Msg
-	}
-	return "", classifyTATResponseCode(result.Code, result.Error, desc, string(brand), appID)
+	return result.TenantAccessToken, nil
 }
--- a/internal/credential/tat_fetch_test.go
+++ b/internal/credential/tat_fetch_test.go
@@ -44,7 +44,7 @@ func (s *stubRoundTripper) RoundTrip(req *http.Request) (*http.Response, error)
 func TestFetchTAT_Success(t *testing.T) {
 	rt := &stubRoundTripper{
 		respCode: 200,
-		respBody: `{"code":0,"access_token":"t-abc","token_type":"Bearer","expires_in":7200}`,
+		respBody: `{"code":0,"tenant_access_token":"t-abc","msg":"ok"}`,
 	}
 	hc := &http.Client{Transport: rt}

@@ -55,33 +55,24 @@ func TestFetchTAT_Success(t *testing.T) {
 	if token != "t-abc" {
 		t.Errorf("token = %q, want t-abc", token)
 	}
-	if rt.gotReq.URL.String() != "https://accounts.feishu.cn/oauth/v3/token" {
+	if rt.gotReq.URL.String() != "https://open.feishu.cn/open-apis/auth/v3/tenant_access_token/internal" {
 		t.Errorf("url = %s", rt.gotReq.URL.String())
 	}
-	if ct := rt.gotReq.Header.Get("Content-Type"); ct != "application/x-www-form-urlencoded" {
-		t.Errorf("Content-Type = %q, want application/x-www-form-urlencoded", ct)
-	}
-	// client_secret_post: grant_type + client_id + client_secret in the form body.
-	for _, want := range []string{"grant_type=client_credentials", "client_id=cli_app", "client_secret=secret_x"} {
-		if !strings.Contains(rt.gotBody, want) {
-			t.Errorf("request body missing %q: %s", want, rt.gotBody)
-		}
+	if !strings.Contains(rt.gotBody, `"app_id":"cli_app"`) || !strings.Contains(rt.gotBody, `"app_secret":"secret_x"`) {
+		t.Errorf("request body missing credentials: %s", rt.gotBody)
 	}
 }

-// invalid_client (wrong app_id/app_secret on the client_credentials grant) is a
-// deterministic client-side rejection that FetchTAT routes to
+// 10003 (bad / non-existent app_id, "invalid param") is classified locally by
 // classifyTATResponseCode as CategoryConfig / SubtypeInvalidClient — the same
 // typed error doResolveTAT (and thus every token-resolving command) returns.
-// The v3 endpoint reports it as HTTP 400 with the OAuth2 error body (wrong
-// secret → code 20002, unknown app → code 20048).
-func TestFetchTAT_InvalidClient_ConfigInvalidClient(t *testing.T) {
-	rt := &stubRoundTripper{respCode: 400, respBody: `{"error":"invalid_client","error_description":"The client secret is invalid.","code":20002}`}
+func TestFetchTAT_Code10003_ConfigInvalidClient(t *testing.T) {
+	rt := &stubRoundTripper{respCode: 200, respBody: `{"code":10003,"msg":"invalid param"}`}
 	hc := &http.Client{Transport: rt}

 	token, err := FetchTAT(context.Background(), hc, core.BrandFeishu, "cli_app", "secret_x")
 	if err == nil {
-		t.Fatal("expected error for invalid_client")
+		t.Fatal("expected error for code 10003")
 	}
 	if token != "" {
 		t.Errorf("token = %q, want empty", token)
@@ -96,115 +87,52 @@ func TestFetchTAT_InvalidClient_ConfigInvalidClient(t *testing.T) {
 	if cfgErr.Subtype != errs.SubtypeInvalidClient {
 		t.Errorf("Subtype = %q, want %q", cfgErr.Subtype, errs.SubtypeInvalidClient)
 	}
+	if cfgErr.Code != 10003 {
+		t.Errorf("Code = %d, want 10003", cfgErr.Code)
+	}
 }

-// Any other deterministic client-side OAuth error (e.g. invalid_scope) still
-// yields a typed error (errs.IsTyped) via BuildAPIError — so a probe caller
-// surfaces it rather than silently swallowing it — but is NOT classified as a
-// credential (invalid_client) problem.
-func TestFetchTAT_OtherClientError_Typed(t *testing.T) {
-	rt := &stubRoundTripper{respCode: 400, respBody: `{"code":20068,"error":"invalid_scope","error_description":"unauthorized scope"}`}
+// 10014 ("app secret invalid") — the most common real-world rejection (real
+// app_id + wrong secret) — is globally mapped in codemeta to
+// CategoryConfig / SubtypeInvalidClient via BuildAPIError.
+func TestFetchTAT_Code10014_ConfigInvalidClient(t *testing.T) {
+	rt := &stubRoundTripper{respCode: 200, respBody: `{"code":10014,"msg":"app secret invalid"}`}
 	hc := &http.Client{Transport: rt}

 	_, err := FetchTAT(context.Background(), hc, core.BrandFeishu, "cli_app", "secret_x")
-	if err == nil {
-		t.Fatal("expected error for invalid_scope")
-	}
-	if !errs.IsTyped(err) {
-		t.Fatalf("expected a typed errs.* error, got %T %v", err, err)
-	}
 	var cfgErr *errs.ConfigError
-	if errors.As(err, &cfgErr) {
-		t.Errorf("invalid_scope must not be classified as ConfigError/InvalidClient, got %T", err)
+	if !errors.As(err, &cfgErr) {
+		t.Fatalf("error not *errs.ConfigError: %T %v", err, err)
+	}
+	if cfgErr.Subtype != errs.SubtypeInvalidClient || cfgErr.Code != 10014 {
+		t.Errorf("got Subtype=%q Code=%d, want invalid_client/10014", cfgErr.Subtype, cfgErr.Code)
 	}
 }

-// A deterministic OAuth error that arrives WITHOUT a numeric code (code defaults to
-// 0) must still surface as a non-nil typed error — never the ("", nil) success pair.
-// Guards the code-0 backstop in classifyTATResponseCode: BuildAPIError returns nil
-// for code 0, which would otherwise swallow this rejection into an empty-token success.
-func TestFetchTAT_OtherClientError_CodeZero_Typed(t *testing.T) {
-	rt := &stubRoundTripper{respCode: 400, respBody: `{"error":"invalid_scope","error_description":"the requested scope is not granted"}`}
-	hc := &http.Client{Transport: rt}
-
-	tok, err := FetchTAT(context.Background(), hc, core.BrandFeishu, "cli_app", "secret_x")
-	if err == nil {
-		t.Fatal("expected non-nil error for code-0 invalid_scope (must not return empty token + nil error)")
-	}
-	if tok != "" {
-		t.Errorf("token = %q, want empty", tok)
-	}
-	if !errs.IsTyped(err) {
-		t.Fatalf("expected a typed errs.* error, got %T %v", err, err)
-	}
-}
-
-// A gateway-style {code, msg} error (no OAuth error / error_description fields)
-// must still surface its msg on the typed error, not degrade to a generic
-// "API error: [code]". Guards the legacy-msg fallback in FetchTAT.
-func TestFetchTAT_LarkStyleMsg_FallsBackOnTypedError(t *testing.T) {
-	rt := &stubRoundTripper{respCode: 400, respBody: `{"code":99999,"msg":"app ticket invalid"}`}
+// Any non-zero body code is a deterministic server-side rejection, so it
+// always yields a typed error (errs.IsTyped). An unrecognized code falls back
+// to CategoryAPI / SubtypeUnknown via BuildAPIError — still typed, so a probe
+// caller still surfaces it rather than silently swallowing.
+func TestFetchTAT_UnknownBodyCode_Typed(t *testing.T) {
+	rt := &stubRoundTripper{respCode: 200, respBody: `{"code":99999,"msg":"future-unknown"}`}
 	hc := &http.Client{Transport: rt}

 	_, err := FetchTAT(context.Background(), hc, core.BrandFeishu, "cli_app", "secret_x")
 	if err == nil {
-		t.Fatal("expected error for {code, msg} response")
+		t.Fatal("expected error for code 99999")
 	}
 	if !errs.IsTyped(err) {
 		t.Fatalf("expected a typed errs.* error, got %T %v", err, err)
 	}
-	if !strings.Contains(err.Error(), "app ticket invalid") {
-		t.Errorf("typed error must carry the Lark msg, got: %v", err)
+	var apiErr *errs.APIError
+	if !errors.As(err, &apiErr) {
+		t.Errorf("unknown code should fall back to *errs.APIError, got %T", err)
 	}
 }

-// Transient server-side failures (5xx / server_error) are NOT deterministic
-// credential rejections — they must stay UNTYPED so a probe caller treats them
-// as upstream noise and stays silent (and retryers can back off).
-func TestFetchTAT_ServerError_Untyped(t *testing.T) {
-	rt := &stubRoundTripper{respCode: 500, respBody: `{"code":20050,"error":"server_error","error_description":"please retry"}`}
-	hc := &http.Client{Transport: rt}
-
-	_, err := FetchTAT(context.Background(), hc, core.BrandFeishu, "cli_app", "secret_x")
-	if err == nil {
-		t.Fatal("expected error for server_error")
-	}
-	if errs.IsTyped(err) {
-		t.Errorf("server_error must be UNTYPED (transient), got typed %T %v", err, err)
-	}
-}
-
-// Rate-limiting is transient, not a deterministic credential rejection — an HTTP
-// 429 (even with a parseable OAuth body) and the OAuth slow_down error must both
-// stay UNTYPED so a rate-limited probe stays silent and retryers can back off.
-func TestFetchTAT_RateLimit_Untyped(t *testing.T) {
-	cases := []struct {
-		name string
-		code int
-		body string
-	}{
-		{"http 429", 429, `{"code":99991400,"error":"too_many_requests","error_description":"rate limit exceeded"}`},
-		{"oauth slow_down", 200, `{"error":"slow_down","error_description":"polling too fast"}`},
-	}
-	for _, tc := range cases {
-		t.Run(tc.name, func(t *testing.T) {
-			rt := &stubRoundTripper{respCode: tc.code, respBody: tc.body}
-			hc := &http.Client{Transport: rt}
-
-			_, err := FetchTAT(context.Background(), hc, core.BrandFeishu, "cli_app", "secret_x")
-			if err == nil {
-				t.Fatal("expected error for rate-limit")
-			}
-			if errs.IsTyped(err) {
-				t.Errorf("rate-limit must be UNTYPED (transient), got typed %T %v", err, err)
-			}
-		})
-	}
-}
-
-// Non-2xx HTTP with a non-JSON body is ambiguous (not a structured OAuth
-// rejection) — it must stay UNTYPED so a probe caller treats it as upstream
-// noise and stays silent.
+// Non-2xx HTTP is ambiguous (not a payload-level credential rejection) — it
+// must stay UNTYPED so a probe caller treats it as upstream noise and stays
+// silent.
 func TestFetchTAT_HTTPNon200_Untyped(t *testing.T) {
 	for _, code := range []int{401, 403, 500, 503} {
 		rt := &stubRoundTripper{respCode: code, respBody: `whatever`}
@@ -254,12 +182,12 @@ func TestFetchTAT_BrandRouting(t *testing.T) {
 		brand   core.LarkBrand
 		wantURL string
 	}{
-		{core.BrandFeishu, "https://accounts.feishu.cn/oauth/v3/token"},
-		{core.BrandLark, "https://accounts.larksuite.com/oauth/v3/token"},
+		{core.BrandFeishu, "https://open.feishu.cn/open-apis/auth/v3/tenant_access_token/internal"},
+		{core.BrandLark, "https://open.larksuite.com/open-apis/auth/v3/tenant_access_token/internal"},
 	}
 	for _, tc := range tests {
 		t.Run(string(tc.brand), func(t *testing.T) {
-			rt := &stubRoundTripper{respCode: 200, respBody: `{"code":0,"access_token":"t","token_type":"Bearer"}`}
+			rt := &stubRoundTripper{respCode: 200, respBody: `{"code":0,"tenant_access_token":"t"}`}
 			hc := &http.Client{Transport: rt}
 			if _, err := FetchTAT(context.Background(), hc, tc.brand, "a", "b"); err != nil {
 				t.Fatal(err)
--- a/internal/errclass/codemeta.go
+++ b/internal/errclass/codemeta.go
@@ -65,7 +65,7 @@ var codeMeta = map[int]CodeMeta{

 	// CategoryConfig
 	99991543: {Category: errs.CategoryConfig, Subtype: errs.SubtypeInvalidClient}, // RFC 6749 §5.2 — app_id / app_secret incorrect (Open API)
-	10014:    {Category: errs.CategoryConfig, Subtype: errs.SubtypeInvalidClient}, // legacy TAT endpoint — "app secret invalid" (pre-v3 variant of 99991543; CLI now reports invalid_client)
+	10014:    {Category: errs.CategoryConfig, Subtype: errs.SubtypeInvalidClient}, // TAT endpoint — "app secret invalid" (TAT-mint variant of 99991543)

 	// CategoryPolicy
 	21000: {Category: errs.CategoryPolicy, Subtype: errs.SubtypeChallengeRequired},
--- a/internal/errclass/codemeta_minutes.go
+++ b/internal/errclass/codemeta_minutes.go
@@ -1,18 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package errclass
-
-import "github.com/larksuite/cli/errs"
-
-// minutesCodeMeta holds minutes-service Lark code → CodeMeta mappings.
-// Only codes whose meaning is stable across minutes endpoints are registered;
-// endpoint-specific codes fall back to CategoryAPI via BuildAPIError.
-// Command-specific messages, hints, and subtypes are layered on top via
-// per-command enrichment.
-// BuildAPIError consumes this map via mergeCodeMeta + LookupCodeMeta.
-var minutesCodeMeta = map[int]CodeMeta{
-	2091005: {Category: errs.CategoryAuthorization, Subtype: errs.SubtypePermissionDenied}, // caller lacks edit/read permission for the minute
-}
-
-func init() { mergeCodeMeta(minutesCodeMeta, "minutes") }
--- a/internal/errclass/codemeta_test.go
+++ b/internal/errclass/codemeta_test.go
@@ -70,12 +70,6 @@ func TestLookupCodeMeta_TaskPermissionDenied_MergedViaInit(t *testing.T) {
 	}
 }

-func TestLookupCodeMeta_MinutesEndpointSpecificCode_NotGlobal(t *testing.T) {
-	if got, ok := LookupCodeMeta(2091001); ok {
-		t.Fatalf("LookupCodeMeta(2091001) = %+v, want unregistered; minutes endpoints use this code for different failures", got)
-	}
-}
-
 func TestLookupCodeMeta_RetryableAuthCode(t *testing.T) {
 	got, ok := LookupCodeMeta(20050)
 	if !ok {
--- a/internal/errclass/codemeta_vc.go
+++ b/internal/errclass/codemeta_vc.go
@@ -1,19 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package errclass
-
-import "github.com/larksuite/cli/errs"
-
-// vcCodeMeta holds vc-service Lark code → CodeMeta mappings.
-// Only codes whose meaning is verifiable from repo evidence are registered;
-// ambiguous codes (e.g. 124002 "recording still generating", which has no
-// precise taxonomy fit) fall back to CategoryAPI via BuildAPIError and rely on
-// per-command enrichment for a retry hint.
-// BuildAPIError consumes this map via mergeCodeMeta + LookupCodeMeta.
-var vcCodeMeta = map[int]CodeMeta{
-	121004: {Category: errs.CategoryAPI, Subtype: errs.SubtypeNotFound},                   // meeting has no minute file
-	121005: {Category: errs.CategoryAuthorization, Subtype: errs.SubtypePermissionDenied}, // caller is not a participant / lacks view permission
-}
-
-func init() { mergeCodeMeta(vcCodeMeta, "vc") }
--- a/internal/event/bus/bus.go
+++ b/internal/event/bus/bus.go
@@ -262,23 +262,19 @@ func (b *Bus) handleConn(conn net.Conn) {

 // handleHello registers a consume connection with the hub; reader carries bytes already pulled off conn.
 func (b *Bus) handleHello(conn net.Conn, reader *bufio.Reader, hello *protocol.Hello) {
-	subID := hello.SubscriptionID
-	if subID == "" {
-		subID = hello.EventKey
-	}
-	bc := NewConn(conn, reader, hello.EventKey, hello.EventTypes, hello.PID, subID)
+	bc := NewConn(conn, reader, hello.EventKey, hello.EventTypes, hello.PID)
 	bc.SetLogger(b.logger)

 	// Register + isFirst under one lock; blocks on any in-progress cleanup lock for the same EventKey.
 	firstForKey := b.hub.RegisterAndIsFirst(bc)

-	bc.SetCheckLastForKey(func(scope string) bool {
-		return b.hub.AcquireCleanupLock(scope)
+	bc.SetCheckLastForKey(func(eventKey string) bool {
+		return b.hub.AcquireCleanupLock(eventKey)
 	})
 	bc.SetOnClose(func(c *Conn) {
 		b.hub.UnregisterAndIsLast(c)
 		// Release is idempotent and must fire on every disconnect path so waiters don't block forever.
-		b.hub.ReleaseCleanupLock(c.SubscriptionID())
+		b.hub.ReleaseCleanupLock(c.EventKey())
 		b.mu.Lock()
 		delete(b.conns, c)
 		remaining := len(b.conns)
--- a/internal/event/bus/bus_shutdown_test.go
+++ b/internal/event/bus/bus_shutdown_test.go
@@ -33,7 +33,7 @@ func TestRunShutdownWithMultipleConns(t *testing.T) {
 		server, client := net.Pipe()
 		pipes = append(pipes, server, client)

-		bc := NewConn(server, nil, "im.msg", []string{"im.message.receive_v1"}, 1000+i, "")
+		bc := NewConn(server, nil, "im.msg", []string{"im.message.receive_v1"}, 1000+i)
 		bc.SetLogger(logger)
 		hub.RegisterAndIsFirst(bc)

--- a/internal/event/bus/conn.go
+++ b/internal/event/bus/conn.go
@@ -29,10 +29,9 @@ type Conn struct {
 	writeMu         sync.Mutex // serialises all net.Conn writes (Encode+SetWriteDeadline is a 2-call sequence)
 	eventKey        string
 	eventTypes      []string
-	subID           string
 	pid             int
 	onClose         func(*Conn)
-	checkLastForKey func(scope string) bool
+	checkLastForKey func(eventKey string) bool
 	logger          *log.Logger
 	closed          chan struct{}
 	closeOnce       sync.Once
@@ -42,7 +41,7 @@ type Conn struct {
 }

 // NewConn creates a Conn; pass a reader with pre-buffered bytes (handoff from Bus.handleConn) or nil for a fresh one.
-func NewConn(conn net.Conn, reader *bufio.Reader, eventKey string, eventTypes []string, pid int, subID string) *Conn {
+func NewConn(conn net.Conn, reader *bufio.Reader, eventKey string, eventTypes []string, pid int) *Conn {
 	if reader == nil {
 		reader = bufio.NewReader(conn)
 	}
@@ -53,20 +52,10 @@ func NewConn(conn net.Conn, reader *bufio.Reader, eventKey string, eventTypes []
 		eventKey:   eventKey,
 		eventTypes: eventTypes,
 		pid:        pid,
-		subID:      subID,
 		closed:     make(chan struct{}),
 	}
 }

-// SubscriptionID returns the subscription identity. Falls back to EventKey
-// when the stored subID is empty (legacy clients / no-SubscriptionKey EventKeys).
-func (c *Conn) SubscriptionID() string {
-	if c.subID == "" {
-		return c.eventKey
-	}
-	return c.subID
-}
-
 func (c *Conn) SetOnClose(fn func(*Conn)) { c.onClose = fn }

 // SetCheckLastForKey: returning true means "you are the last subscriber, run cleanup".
@@ -143,19 +132,13 @@ func (c *Conn) ReaderLoop() {
 }

 func (c *Conn) handleControlMessage(msg interface{}) {
-	switch msg.(type) {
+	switch m := msg.(type) {
 	case *protocol.Bye:
 		c.shutdown()
 	case *protocol.PreShutdownCheck:
-		// Use the connection's own authoritative subscription identity rather
-		// than recomputing from the incoming message: a stale or mismatched
-		// PreShutdownCheck must not ask about the wrong scope (which would
-		// suppress or mistrigger per-subscription cleanup). Conn.SubscriptionID()
-		// already falls back to EventKey when its stored subID is empty.
-		scope := c.SubscriptionID()
 		lastForKey := true
 		if c.checkLastForKey != nil {
-			lastForKey = c.checkLastForKey(scope)
+			lastForKey = c.checkLastForKey(m.EventKey)
 		}
 		ack := protocol.NewPreShutdownAck(lastForKey)
 		if err := c.writeFrame(ack); err != nil && c.logger != nil {
--- a/internal/event/bus/conn_test.go
+++ b/internal/event/bus/conn_test.go
@@ -21,7 +21,7 @@ func TestConn_SenderWritesEvents(t *testing.T) {
 	defer server.Close()
 	defer client.Close()

-	bc := NewConn(server, nil, "im.msg", []string{"im.message.receive_v1"}, 12345, "")
+	bc := NewConn(server, nil, "im.msg", []string{"im.message.receive_v1"}, 12345)
 	go bc.SenderLoop()

 	bc.SendCh() <- &protocol.Event{
@@ -62,7 +62,7 @@ func TestConn_ConcurrentWritesSerialised(t *testing.T) {
 	defer client.Close()

 	det := &serializingDetector{Conn: server}
-	bc := NewConn(det, nil, "im.msg", []string{"im.msg"}, 12345, "")
+	bc := NewConn(det, nil, "im.msg", []string{"im.msg"}, 12345)

 	go func() { _, _ = io.Copy(io.Discard, client) }()

@@ -106,7 +106,7 @@ func TestConn_TrySend_NonEvicting(t *testing.T) {
 	server, client := net.Pipe()
 	defer server.Close()
 	defer client.Close()
-	bc := NewConn(server, nil, "im.msg", []string{"im.msg"}, 12345, "")
+	bc := NewConn(server, nil, "im.msg", []string{"im.msg"}, 12345)

 	for i := 0; i < sendChCap; i++ {
 		if !bc.TrySend(i) {
@@ -126,7 +126,7 @@ func TestConn_ReaderDetectsEOF(t *testing.T) {
 	server, client := net.Pipe()
 	defer server.Close()

-	bc := NewConn(server, nil, "im.msg", []string{"im.msg"}, 12345, "")
+	bc := NewConn(server, nil, "im.msg", []string{"im.msg"}, 12345)

 	done := make(chan struct{})
 	go func() {
@@ -142,23 +142,3 @@ func TestConn_ReaderDetectsEOF(t *testing.T) {
 		t.Fatal("ReaderLoop did not exit on EOF")
 	}
 }
-
-func TestConn_SubscriptionID(t *testing.T) {
-	c1, c2 := net.Pipe()
-	defer c1.Close()
-	defer c2.Close()
-	conn := NewConn(c1, nil, "mail.x", []string{"mail.x"}, 999, "mail.x:abc")
-	if got := conn.SubscriptionID(); got != "mail.x:abc" {
-		t.Errorf("SubscriptionID() = %q, want %q", got, "mail.x:abc")
-	}
-}
-
-func TestConn_SubscriptionID_EmptyFallsBackToEventKey(t *testing.T) {
-	c1, c2 := net.Pipe()
-	defer c1.Close()
-	defer c2.Close()
-	conn := NewConn(c1, nil, "mail.x", []string{"mail.x"}, 999, "")
-	if got := conn.SubscriptionID(); got != "mail.x" {
-		t.Errorf("SubscriptionID() with empty input = %q, want fallback %q", got, "mail.x")
-	}
-}
--- a/internal/event/bus/handle_hello_test.go
+++ b/internal/event/bus/handle_hello_test.go
@@ -63,134 +63,3 @@ func TestHandleHello_HelloAckWriteFailureUnregisters(t *testing.T) {
 		t.Errorf("b.conns after failed HelloAck = %d entries, want 0", remaining)
 	}
 }
-
-// TestHandleHello_LegacyClient_FallsBackToEventKey: a Hello with empty
-// subscription_id registers under EventKey (today's behavior preserved).
-func TestHandleHello_LegacyClient_FallsBackToEventKey(t *testing.T) {
-	logger := log.New(io.Discard, "", 0)
-	hub := NewHub()
-	b := &Bus{
-		hub:        hub,
-		logger:     logger,
-		conns:      make(map[*Conn]struct{}),
-		idleTimer:  time.NewTimer(30 * time.Second),
-		shutdownCh: make(chan struct{}, 1),
-	}
-
-	server, client := net.Pipe()
-	defer server.Close()
-	defer client.Close()
-
-	// Legacy client: no subscription_id field (empty string).
-	hello := &protocol.Hello{
-		PID:            9999,
-		EventKey:       "im.message",
-		EventTypes:     []string{"im.message.receive_v1"},
-		SubscriptionID: "", // legacy: empty, should fallback to EventKey
-	}
-
-	br := bufio.NewReader(server)
-
-	done := make(chan struct{})
-	go func() {
-		b.handleHello(server, br, hello)
-		close(done)
-	}()
-
-	// Read the HelloAck from client side to let handleHello complete.
-	clientReader := bufio.NewReader(client)
-	ackLine, err := clientReader.ReadString('\n')
-	if err != nil {
-		t.Fatalf("failed to read HelloAck: %v", err)
-	}
-
-	select {
-	case <-done:
-	case <-time.After(3 * time.Second):
-		t.Fatal("handleHello did not return within 3s")
-	}
-
-	// Assertions: registered under EventKey (not a qualified subscription ID).
-	if got := hub.ConnCount(); got != 1 {
-		t.Errorf("hub.ConnCount = %d, want 1", got)
-	}
-	if got := hub.EventKeyCount("im.message"); got != 1 {
-		t.Errorf("hub.EventKeyCount(im.message) = %d, want 1", got)
-	}
-	if got := hub.SubCount("im.message"); got != 1 {
-		t.Errorf("hub.SubCount(im.message) = %d, want 1 (legacy fallback to EventKey)", got)
-	}
-	if got := hub.SubCount("im.message:something"); got != 0 {
-		t.Errorf("hub.SubCount(im.message:something) = %d, want 0 (should not exist)", got)
-	}
-
-	if ackLine == "" {
-		t.Fatal("HelloAck was empty")
-	}
-}
-
-// TestHandleHello_ModernClient_UsesSubscriptionID: a Hello with
-// non-empty subscription_id registers under that ID, not EventKey.
-func TestHandleHello_ModernClient_UsesSubscriptionID(t *testing.T) {
-	logger := log.New(io.Discard, "", 0)
-	hub := NewHub()
-	b := &Bus{
-		hub:        hub,
-		logger:     logger,
-		conns:      make(map[*Conn]struct{}),
-		idleTimer:  time.NewTimer(30 * time.Second),
-		shutdownCh: make(chan struct{}, 1),
-	}
-
-	server, client := net.Pipe()
-	defer server.Close()
-	defer client.Close()
-
-	// Modern client: subscription_id explicitly set.
-	subscriptionID := "mail.message:alice@example.com"
-	hello := &protocol.Hello{
-		PID:            8888,
-		EventKey:       "mail.message",
-		EventTypes:     []string{"mail.message.receive_v1"},
-		SubscriptionID: subscriptionID, // modern: per-resource subscription
-	}
-
-	br := bufio.NewReader(server)
-
-	done := make(chan struct{})
-	go func() {
-		b.handleHello(server, br, hello)
-		close(done)
-	}()
-
-	// Read the HelloAck from client side to let handleHello complete.
-	clientReader := bufio.NewReader(client)
-	ackLine, err := clientReader.ReadString('\n')
-	if err != nil {
-		t.Fatalf("failed to read HelloAck: %v", err)
-	}
-
-	select {
-	case <-done:
-	case <-time.After(3 * time.Second):
-		t.Fatal("handleHello did not return within 3s")
-	}
-
-	// Assertions: registered under the subscription_id, not bare EventKey.
-	if got := hub.ConnCount(); got != 1 {
-		t.Errorf("hub.ConnCount = %d, want 1", got)
-	}
-	if got := hub.EventKeyCount("mail.message"); got != 1 {
-		t.Errorf("hub.EventKeyCount(mail.message) = %d, want 1", got)
-	}
-	if got := hub.SubCount(subscriptionID); got != 1 {
-		t.Errorf("hub.SubCount(%q) = %d, want 1 (modern: uses SubscriptionID)", subscriptionID, got)
-	}
-	if got := hub.SubCount("mail.message"); got != 0 {
-		t.Errorf("hub.SubCount(mail.message) = %d, want 0 (modern: NOT registered under bare EventKey)", got)
-	}
-
-	if ackLine == "" {
-		t.Fatal("HelloAck was empty")
-	}
-}
--- a/internal/event/bus/hub.go
+++ b/internal/event/bus/hub.go
@@ -16,9 +16,6 @@ import (
 // Subscriber is the interface a connection must satisfy for Hub registration.
 type Subscriber interface {
 	EventKey() string
-	// SubscriptionID identifies the per-resource subscription for dedup purposes.
-	// When no resource qualifier is needed it equals EventKey.
-	SubscriptionID() string
 	EventTypes() []string
 	SendCh() chan interface{}
 	PID() int
@@ -37,11 +34,8 @@ type Subscriber interface {
 type Hub struct {
 	mu          sync.RWMutex
 	subscribers map[Subscriber]struct{}
-	// subCounts is keyed by SubscriptionID (not EventKey) so that different
-	// per-resource subscriptions sharing the same EventKey are deduped independently.
-	subCounts map[string]int
-	// cleanupInProgress[subscriptionID] holds a channel closed on release;
-	// presence means a cleanup lock is held for that subscription.
+	keyCounts   map[string]int
+	// cleanupInProgress[key] holds a channel closed on release; presence means a cleanup lock is held.
 	cleanupInProgress map[string]chan struct{}
 	logger            atomic.Pointer[log.Logger]
 }
@@ -49,7 +43,7 @@ type Hub struct {
 func NewHub() *Hub {
 	return &Hub{
 		subscribers:       make(map[Subscriber]struct{}),
-		subCounts:         make(map[string]int),
+		keyCounts:         make(map[string]int),
 		cleanupInProgress: make(map[string]chan struct{}),
 	}
 }
@@ -57,7 +51,7 @@ func NewHub() *Hub {
 // SetLogger attaches a logger (nil tolerated).
 func (h *Hub) SetLogger(l *log.Logger) { h.logger.Store(l) }

-// UnregisterAndIsLast removes s and reports whether it was last for its SubscriptionID; stale unregisters are no-ops.
+// UnregisterAndIsLast removes s and reports whether it was last for its EventKey; stale unregisters are no-ops.
 func (h *Hub) UnregisterAndIsLast(s Subscriber) bool {
 	h.mu.Lock()
 	defer h.mu.Unlock()
@@ -65,35 +59,34 @@ func (h *Hub) UnregisterAndIsLast(s Subscriber) bool {
 		return false
 	}
 	delete(h.subscribers, s)
-	sid := s.SubscriptionID()
-	h.subCounts[sid]--
-	isLast := h.subCounts[sid] == 0
+	h.keyCounts[s.EventKey()]--
+	isLast := h.keyCounts[s.EventKey()] == 0
 	if isLast {
-		delete(h.subCounts, sid)
+		delete(h.keyCounts, s.EventKey())
 	}
 	return isLast
 }

-// AcquireCleanupLock reserves cleanup rights iff exactly one subscriber exists for subscriptionID and no lock is held.
+// AcquireCleanupLock reserves cleanup rights iff exactly one subscriber exists for eventKey and no lock is held.
 // Count==0 is rejected (would block future Register calls). On true return, caller MUST Release.
-func (h *Hub) AcquireCleanupLock(subscriptionID string) bool {
+func (h *Hub) AcquireCleanupLock(eventKey string) bool {
 	h.mu.Lock()
 	defer h.mu.Unlock()
-	if h.subCounts[subscriptionID] != 1 {
+	if h.keyCounts[eventKey] != 1 {
 		return false
 	}
-	if _, alreadyLocked := h.cleanupInProgress[subscriptionID]; alreadyLocked {
+	if _, alreadyLocked := h.cleanupInProgress[eventKey]; alreadyLocked {
 		return false
 	}
-	h.cleanupInProgress[subscriptionID] = make(chan struct{})
+	h.cleanupInProgress[eventKey] = make(chan struct{})
 	return true
 }

 // ReleaseCleanupLock is idempotent; OnClose calls unconditionally.
-func (h *Hub) ReleaseCleanupLock(subscriptionID string) {
+func (h *Hub) ReleaseCleanupLock(eventKey string) {
 	h.mu.Lock()
-	ch := h.cleanupInProgress[subscriptionID]
-	delete(h.cleanupInProgress, subscriptionID)
+	ch := h.cleanupInProgress[eventKey]
+	delete(h.cleanupInProgress, eventKey)
 	h.mu.Unlock()
 	if ch != nil {
 		close(ch)
@@ -101,24 +94,23 @@ func (h *Hub) ReleaseCleanupLock(subscriptionID string) {
 }

 // RegisterAndIsFirst adds s to the hub and reports whether it's the first
-// subscriber for its SubscriptionID. If a cleanup is in progress for
-// s.SubscriptionID() (another conn holds the cleanup lock), this waits until
+// subscriber for its EventKey. If a cleanup is in progress for
+// s.EventKey() (another conn holds the cleanup lock), this waits until
 // cleanup releases before registering — closing the PreShutdownCheck ×
 // Hello TOCTOU race. The wait releases h.mu before blocking on the
-// channel, so concurrent operations on other subscriptions aren't stalled.
+// channel, so concurrent operations on other keys aren't stalled.
 func (h *Hub) RegisterAndIsFirst(s Subscriber) bool {
-	sid := s.SubscriptionID()
 	for {
 		h.mu.Lock()
-		ch, locked := h.cleanupInProgress[sid]
+		ch, locked := h.cleanupInProgress[s.EventKey()]
 		if locked {
 			h.mu.Unlock()
 			<-ch // wait for release, then re-check (defensive against races)
 			continue
 		}
-		isFirst := h.subCounts[sid] == 0
+		isFirst := h.keyCounts[s.EventKey()] == 0
 		h.subscribers[s] = struct{}{}
-		h.subCounts[sid]++
+		h.keyCounts[s.EventKey()]++
 		h.mu.Unlock()
 		return isFirst
 	}
@@ -184,25 +176,11 @@ func (h *Hub) ConnCount() int {
 	return len(h.subscribers)
 }

-// EventKeyCount returns total subscribers for the given EventKey, aggregating
-// across all SubscriptionIDs. For per-subscription counts use SubCount.
+// EventKeyCount returns the number of subscribers registered for eventKey.
 func (h *Hub) EventKeyCount(eventKey string) int {
 	h.mu.RLock()
 	defer h.mu.RUnlock()
-	count := 0
-	for s := range h.subscribers {
-		if s.EventKey() == eventKey {
-			count++
-		}
-	}
-	return count
-}
-
-// SubCount returns the count of subscribers for the given SubscriptionID.
-func (h *Hub) SubCount(subscriptionID string) int {
-	h.mu.RLock()
-	defer h.mu.RUnlock()
-	return h.subCounts[subscriptionID]
+	return h.keyCounts[eventKey]
 }

 // BroadcastSourceStatus fans out a source-level status change to every
@@ -227,11 +205,10 @@ func (h *Hub) Consumers() []protocol.ConsumerInfo {
 	result := make([]protocol.ConsumerInfo, 0, len(h.subscribers))
 	for s := range h.subscribers {
 		result = append(result, protocol.ConsumerInfo{
-			PID:            s.PID(),
-			EventKey:       s.EventKey(),
-			SubscriptionID: s.SubscriptionID(),
-			Received:       s.Received(),
-			Dropped:        s.DroppedCount(),
+			PID:      s.PID(),
+			EventKey: s.EventKey(),
+			Received: s.Received(),
+			Dropped:  s.DroppedCount(),
 		})
 	}
 	return result
--- a/internal/event/bus/hub_observability_test.go
+++ b/internal/event/bus/hub_observability_test.go
@@ -17,7 +17,7 @@ func TestHubDroppedCountIncrements(t *testing.T) {
 	server, client := testNetPipe(t)
 	defer server.Close()
 	defer client.Close()
-	c := NewConn(server, nil, "k", []string{"t"}, 1, "")
+	c := NewConn(server, nil, "k", []string{"t"}, 1)
 	c.sendCh = make(chan interface{}, 1)
 	h.RegisterAndIsFirst(c)

@@ -35,7 +35,7 @@ func TestPublishAssignsIncrementalSeq(t *testing.T) {
 	server, client := testNetPipe(t)
 	defer server.Close()
 	defer client.Close()
-	c := NewConn(server, nil, "k", []string{"t"}, 1, "")
+	c := NewConn(server, nil, "k", []string{"t"}, 1)
 	c.sendCh = make(chan interface{}, 10)
 	h.RegisterAndIsFirst(c)

@@ -60,7 +60,7 @@ func TestPublishPopulatesEventIDAndSourceTime(t *testing.T) {
 	server, client := testNetPipe(t)
 	defer server.Close()
 	defer client.Close()
-	c := NewConn(server, nil, "k", []string{"t"}, 1, "")
+	c := NewConn(server, nil, "k", []string{"t"}, 1)
 	c.sendCh = make(chan interface{}, 1)
 	h.RegisterAndIsFirst(c)

@@ -87,7 +87,7 @@ func TestPublishSourceTimeTakesPrecedence(t *testing.T) {
 	server, client := testNetPipe(t)
 	defer server.Close()
 	defer client.Close()
-	c := NewConn(server, nil, "k", []string{"t"}, 1, "")
+	c := NewConn(server, nil, "k", []string{"t"}, 1)
 	c.sendCh = make(chan interface{}, 1)
 	h.RegisterAndIsFirst(c)

@@ -111,7 +111,7 @@ func TestPublishSourceTimeFallback(t *testing.T) {
 	server, client := testNetPipe(t)
 	defer server.Close()
 	defer client.Close()
-	c := NewConn(server, nil, "k", []string{"t"}, 1, "")
+	c := NewConn(server, nil, "k", []string{"t"}, 1)
 	c.sendCh = make(chan interface{}, 1)
 	h.RegisterAndIsFirst(c)

--- a/internal/event/bus/hub_publish_race_test.go
+++ b/internal/event/bus/hub_publish_race_test.go
@@ -111,7 +111,6 @@ type alwaysFailSubscriber struct {
 }

 func (s *alwaysFailSubscriber) EventKey() string         { return s.eventKey }
-func (s *alwaysFailSubscriber) SubscriptionID() string   { return s.eventKey }
 func (s *alwaysFailSubscriber) EventTypes() []string     { return s.eventTypes }
 func (s *alwaysFailSubscriber) SendCh() chan interface{} { return s.sendCh }
 func (s *alwaysFailSubscriber) PID() int                 { return 0 }
@@ -154,7 +153,6 @@ func newRaceSubscriber(key string, types []string, capacity int) *raceSubscriber
 }

 func (s *raceSubscriber) EventKey() string         { return s.eventKey }
-func (s *raceSubscriber) SubscriptionID() string   { return s.eventKey }
 func (s *raceSubscriber) EventTypes() []string     { return s.eventTypes }
 func (s *raceSubscriber) SendCh() chan interface{} { return s.sendCh }
 func (s *raceSubscriber) PID() int                 { return s.pid }
--- a/internal/event/bus/hub_test.go
+++ b/internal/event/bus/hub_test.go
@@ -5,7 +5,6 @@ package bus

 import (
 	"encoding/json"
-	"net"
 	"sync"
 	"sync/atomic"
 	"testing"
@@ -236,10 +235,7 @@ func newTestConn(eventKey string, eventTypes []string) *testConn {
 	}
 }

-func (c *testConn) EventKey() string { return c.eventKey }
-
-// SubscriptionID falls back to EventKey for test mocks that don't set a separate subscription ID.
-func (c *testConn) SubscriptionID() string   { return c.eventKey }
+func (c *testConn) EventKey() string         { return c.eventKey }
 func (c *testConn) EventTypes() []string     { return c.eventTypes }
 func (c *testConn) SendCh() chan interface{} { return c.sendCh }
 func (c *testConn) PID() int                 { return c.pid }
@@ -279,79 +275,3 @@ func (c *testConn) TrySend(msg interface{}) bool {
 		return false
 	}
 }
-
-func TestHub_SubscriptionID_Isolation(t *testing.T) {
-	h := NewHub()
-	c1, _ := net.Pipe()
-	c2, _ := net.Pipe()
-	defer c1.Close()
-	defer c2.Close()
-	s1 := NewConn(c1, nil, "mail.x", []string{"mail.x"}, 1, "mail.x:alice")
-	s2 := NewConn(c2, nil, "mail.x", []string{"mail.x"}, 2, "mail.x:bob")
-
-	if !h.RegisterAndIsFirst(s1) {
-		t.Error("s1 should be first for its subscription")
-	}
-	if !h.RegisterAndIsFirst(s2) {
-		t.Error("s2 should ALSO be first (different SubscriptionID)")
-	}
-	if !h.UnregisterAndIsLast(s1) {
-		t.Error("s1 should be last for mail.x:alice")
-	}
-	if !h.UnregisterAndIsLast(s2) {
-		t.Error("s2 should be last for mail.x:bob")
-	}
-}
-
-func TestHub_SameSubscriptionID_NotFirst(t *testing.T) {
-	h := NewHub()
-	c1, _ := net.Pipe()
-	c2, _ := net.Pipe()
-	defer c1.Close()
-	defer c2.Close()
-	s1 := NewConn(c1, nil, "mail.x", []string{"mail.x"}, 1, "mail.x:alice")
-	s2 := NewConn(c2, nil, "mail.x", []string{"mail.x"}, 2, "mail.x:alice")
-
-	if !h.RegisterAndIsFirst(s1) {
-		t.Error("s1 first")
-	}
-	if h.RegisterAndIsFirst(s2) {
-		t.Error("s2 same SubscriptionID should NOT be first")
-	}
-}
-
-func TestHub_EventKeyCount_AggregatesAcrossSubscriptions(t *testing.T) {
-	h := NewHub()
-	c1, _ := net.Pipe()
-	c2, _ := net.Pipe()
-	defer c1.Close()
-	defer c2.Close()
-	s1 := NewConn(c1, nil, "mail.x", []string{"mail.x"}, 1, "mail.x:alice")
-	s2 := NewConn(c2, nil, "mail.x", []string{"mail.x"}, 2, "mail.x:bob")
-	h.RegisterAndIsFirst(s1)
-	h.RegisterAndIsFirst(s2)
-	if got := h.EventKeyCount("mail.x"); got != 2 {
-		t.Errorf("EventKeyCount(mail.x) = %d, want 2 (aggregated across subscriptions)", got)
-	}
-	if got := h.SubCount("mail.x:alice"); got != 1 {
-		t.Errorf("SubCount(mail.x:alice) = %d, want 1", got)
-	}
-	if got := h.SubCount("mail.x:bob"); got != 1 {
-		t.Errorf("SubCount(mail.x:bob) = %d, want 1", got)
-	}
-}
-
-func TestHub_Consumers_PopulatesSubscriptionID(t *testing.T) {
-	h := NewHub()
-	c1, _ := net.Pipe()
-	defer c1.Close()
-	s1 := NewConn(c1, nil, "mail.x", []string{"mail.x"}, 1, "mail.x:alice")
-	h.RegisterAndIsFirst(s1)
-	consumers := h.Consumers()
-	if len(consumers) != 1 {
-		t.Fatalf("got %d consumers, want 1", len(consumers))
-	}
-	if consumers[0].SubscriptionID != "mail.x:alice" {
-		t.Errorf("Consumers()[0].SubscriptionID = %q, want %q", consumers[0].SubscriptionID, "mail.x:alice")
-	}
-}
--- a/internal/event/consume/consume.go
+++ b/internal/event/consume/consume.go
@@ -14,7 +14,6 @@ import (
 	"sync/atomic"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/event"
 	"github.com/larksuite/cli/internal/event/transport"
 )
@@ -45,9 +44,7 @@ func Run(ctx context.Context, tr transport.IPC, appID, profileName, domain strin

 	keyDef, ok := event.Lookup(opts.EventKey)
 	if !ok {
-		return errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"unknown EventKey: %s", opts.EventKey).
-			WithHint("run `lark-cli event list` to see available keys")
+		return fmt.Errorf("unknown EventKey: %s\nRun 'lark-cli event list' to see available keys", opts.EventKey)
 	}

 	if err := validateParams(keyDef, opts.Params); err != nil {
@@ -61,22 +58,6 @@ func Run(ctx context.Context, tr transport.IPC, appID, profileName, domain strin
 		}
 	}

-	// Normalize params (resolve aliases like "me" -> real email) before fingerprint
-	// compute, PreConsume, Match, Process. Must happen BEFORE doHello so the
-	// SubscriptionID we send to bus reflects canonical values.
-	if keyDef.NormalizeParams != nil {
-		if err := keyDef.NormalizeParams(ctx, opts.Runtime, opts.Params); err != nil {
-			if _, ok := errs.ProblemOf(err); ok {
-				return err
-			}
-			return errs.NewInternalError(errs.SubtypeUnknown,
-				"normalize params for %s: %s", opts.EventKey, err).WithCause(err)
-		}
-	}
-
-	// Compute subscription identity from normalized params + SubscriptionKey flags.
-	subscriptionID := ComputeSubscriptionID(keyDef, opts.Params)
-
 	if opts.Timeout > 0 {
 		var cancel context.CancelFunc
 		ctx, cancel = context.WithTimeout(ctx, opts.Timeout)
@@ -97,24 +78,19 @@ func Run(ctx context.Context, tr transport.IPC, appID, profileName, domain strin
 	}
 	defer conn.Close()

-	ack, br, err := doHello(conn, opts.EventKey, []string{keyDef.EventType}, subscriptionID)
+	ack, br, err := doHello(conn, opts.EventKey, []string{keyDef.EventType})
 	if err != nil {
-		return errs.NewInternalError(errs.SubtypeUnknown,
-			"event bus handshake failed: %s", err).WithCause(err)
+		return fmt.Errorf("handshake failed: %w", err)
 	}

-	var cleanup func() error
+	var cleanup func()
 	if ack.FirstForKey && keyDef.PreConsume != nil {
 		if !opts.Quiet {
 			fmt.Fprintf(errOut, "[event] running pre-consume setup...\n")
 		}
 		cleanup, err = keyDef.PreConsume(ctx, opts.Runtime, opts.Params)
 		if err != nil {
-			if _, ok := errs.ProblemOf(err); ok {
-				return err
-			}
-			return errs.NewInternalError(errs.SubtypeUnknown,
-				"pre-consume failed: %s", err).WithCause(err)
+			return fmt.Errorf("pre-consume failed: %w", err)
 		}
 	}

@@ -129,22 +105,14 @@ func Run(ctx context.Context, tr transport.IPC, appID, profileName, domain strin
 		if cleanup != nil {
 			switch {
 			case r != nil:
-				fmt.Fprintf(errOut,
-					"WARN: panic recovered; running cleanup unconditionally (may affect other consumers of %s)\n",
-					opts.EventKey)
-				if cleanupErr := cleanup(); cleanupErr != nil {
-					fmt.Fprintf(errOut,
-						"WARN: cleanup also failed during panic recovery: %v\n", cleanupErr)
-				}
+				fmt.Fprintf(errOut, "WARN: panic recovered; running cleanup unconditionally (may affect other consumers of %s)\n", opts.EventKey)
+				cleanup()
 			case lastForKey:
 				if !opts.Quiet {
 					fmt.Fprintf(errOut, "[event] running cleanup...\n")
 				}
-				if cleanupErr := cleanup(); cleanupErr != nil {
-					fmt.Fprintf(errOut,
-						"WARN: cleanup failed: %v (server-side subscribe is idempotent — residual record will be overwritten on next subscribe)\n",
-						cleanupErr)
-				} else if !opts.Quiet {
+				cleanup()
+				if !opts.Quiet {
 					fmt.Fprintf(errOut, "[event] cleanup done.\n")
 				}
 			}
@@ -162,13 +130,13 @@ func Run(ctx context.Context, tr transport.IPC, appID, profileName, domain strin
 	if !opts.Quiet {
 		fmt.Fprintln(errOut, listeningText(opts))
 		if !opts.IsTTY {
-			fmt.Fprintln(errOut, stopHintText(opts))
+			fmt.Fprintln(errOut, stopHintText())
 		}
 	}

 	writeReadyMarker(errOut, opts)

-	return consumeLoop(ctx, conn, br, keyDef, opts, subscriptionID, &lastForKey, &emitted)
+	return consumeLoop(ctx, conn, br, keyDef, opts, &lastForKey, &emitted)
 }

 func truncateDuration(d time.Duration) time.Duration {
@@ -184,10 +152,8 @@ func validateParams(def *event.KeyDefinition, params map[string]string) error {
 	for _, p := range def.Params {
 		if p.Required {
 			if _, ok := params[p.Name]; !ok {
-				return errs.NewValidationError(errs.SubtypeInvalidArgument,
-					"required param %q missing for EventKey %s", p.Name, def.Key).
-					WithParam("--param").
-					WithHint("pass it as --param %s=<value>; run `lark-cli event schema %s` for details", p.Name, def.Key)
+				return fmt.Errorf("required param %q missing for EventKey %s. Run 'lark-cli event schema %s' for details",
+					p.Name, def.Key, def.Key)
 			}
 		}
 	}
@@ -203,15 +169,11 @@ func validateParams(def *event.KeyDefinition, params map[string]string) error {
 			continue
 		}
 		if len(validNames) == 0 {
-			return errs.NewValidationError(errs.SubtypeInvalidArgument,
-				"unknown param %q: EventKey %s accepts no params", k, def.Key).
-				WithParam("--param").
-				WithHint("run `lark-cli event schema %s` for details", def.Key)
+			return fmt.Errorf("unknown param %q: EventKey %s accepts no params. Run 'lark-cli event schema %s' for details",
+				k, def.Key, def.Key)
 		}
-		return errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"unknown param %q for EventKey %s. valid params: %s", k, def.Key, strings.Join(validNames, ", ")).
-			WithParam("--param").
-			WithHint("run `lark-cli event schema %s` for details", def.Key)
+		return fmt.Errorf("unknown param %q for EventKey %s. valid params: %s. Run 'lark-cli event schema %s' for details",
+			k, def.Key, strings.Join(validNames, ", "), def.Key)
 	}
 	return nil
 }
@@ -251,11 +213,7 @@ func exitReason(ctx context.Context, emitted int64, opts Options) string {
 	return "signal"
 }

-func stopHintText(opts Options) string {
-	if opts.MaxEvents > 0 || opts.Timeout > 0 {
-		return "[event] to stop gracefully: send SIGTERM (kill <pid>). " +
-			"Avoid kill -9 — it skips cleanup and may leak server-side subscriptions."
-	}
+func stopHintText() string {
 	return "[event] to stop gracefully: send SIGTERM (kill <pid>) or close stdin. " +
 		"Avoid kill -9 — it skips cleanup and may leak server-side subscriptions."
 }
--- a/internal/event/consume/consume_test.go
+++ b/internal/event/consume/consume_test.go
@@ -1,101 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package consume
-
-import (
-	"bufio"
-	"bytes"
-	"context"
-	"encoding/json"
-	"errors"
-	"net"
-	"strings"
-	"testing"
-
-	"github.com/larksuite/cli/internal/event"
-	"github.com/larksuite/cli/internal/event/protocol"
-	"github.com/larksuite/cli/internal/event/transport"
-)
-
-// fakeRT is a minimal event.APIClient mock.
-type fakeRT struct {
-	err error
-}
-
-func (f *fakeRT) CallAPI(_ context.Context, _, _ string, _ interface{}) (json.RawMessage, error) {
-	return nil, f.err
-}
-
-func TestNormalizeParams_ErrorIsWrappedWithEventKey(t *testing.T) {
-	// Drives the real Run() path: NormalizeParams fails before EnsureBus, so no
-	// bus is contacted, yet the production error-wrapping is exercised — if Run()
-	// ever stops wrapping, this test fails.
-	const key = "test.evt_normalize_fail"
-	event.RegisterKey(event.KeyDefinition{
-		Key:       key,
-		EventType: key,
-		Schema:    event.SchemaDef{Custom: &event.SchemaSpec{Raw: json.RawMessage(`{"type":"object"}`)}},
-		NormalizeParams: func(_ context.Context, _ event.APIClient, _ map[string]string) error {
-			return errors.New("simulated normalize failure")
-		},
-	})
-	defer event.UnregisterKeyForTest(key)
-
-	err := Run(context.Background(), transport.New(), "app", "", "", Options{
-		EventKey: key,
-		Runtime:  &fakeRT{},
-		Quiet:    true,
-	})
-	if err == nil {
-		t.Fatal("expected Run to fail when NormalizeParams errors")
-	}
-	if !strings.Contains(err.Error(), "normalize params for "+key+":") {
-		t.Errorf("error not wrapped with EventKey prefix: %v", err)
-	}
-	if !strings.Contains(err.Error(), "simulated normalize failure") {
-		t.Errorf("underlying error not propagated: %v", err)
-	}
-}
-
-func TestDoHello_PassesSubscriptionIDToWire(t *testing.T) {
-	a, b := net.Pipe()
-	defer a.Close()
-	defer b.Close()
-
-	// Server-side: read Hello, decode, assert SubscriptionID, send ack
-	done := make(chan string, 1)
-	go func() {
-		br := bufio.NewReader(b)
-		line, err := protocol.ReadFrame(br)
-		if err != nil {
-			done <- "READ_ERR:" + err.Error()
-			return
-		}
-		msg, err := protocol.Decode(bytes.TrimRight(line, "\n"))
-		if err != nil {
-			done <- "DECODE_ERR:" + err.Error()
-			return
-		}
-		if hello, ok := msg.(*protocol.Hello); ok {
-			done <- hello.SubscriptionID
-			// send ack so client can return
-			ack := protocol.NewHelloAck("v1", true)
-			_ = protocol.EncodeWithDeadline(b, ack, protocol.WriteTimeout)
-		} else {
-			done <- "WRONG_TYPE"
-		}
-	}()
-
-	ack, _, err := doHello(a, "mail.x", []string{"mail.x"}, "mail.x:alice")
-	if err != nil {
-		t.Fatalf("doHello error: %v", err)
-	}
-	if ack == nil {
-		t.Fatal("got nil ack")
-	}
-	got := <-done
-	if got != "mail.x:alice" {
-		t.Errorf("Hello.SubscriptionID on wire = %q, want %q", got, "mail.x:alice")
-	}
-}
--- a/internal/event/consume/fingerprint.go
+++ b/internal/event/consume/fingerprint.go
@@ -1,41 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package consume
-
-import (
-	"crypto/sha256"
-	"encoding/base64"
-	"encoding/json"
-	"sort"
-
-	"github.com/larksuite/cli/internal/event"
-)
-
-// ComputeSubscriptionID returns a stable identifier scoped to (EventKey, values
-// of the ParamDefs marked SubscriptionKey); the framework uses it to dedup
-// PreConsume/cleanup gates and key Hub counts per-subscription. No SubscriptionKey
-// params -> returns def.Key verbatim (legacy one-dimensional behavior).
-//
-// Stability contract: same EventKey + same normalized param values -> same ID
-// across CLI versions; changing the encoding requires a wire-format bump.
-func ComputeSubscriptionID(def *event.KeyDefinition, params map[string]string) string {
-	type kv struct {
-		Name  string `json:"name"`
-		Value string `json:"value"`
-	}
-	var subParams []kv
-	for _, p := range def.Params {
-		if !p.SubscriptionKey {
-			continue
-		}
-		subParams = append(subParams, kv{Name: p.Name, Value: params[p.Name]})
-	}
-	if len(subParams) == 0 {
-		return def.Key
-	}
-	sort.Slice(subParams, func(i, j int) bool { return subParams[i].Name < subParams[j].Name })
-	raw, _ := json.Marshal(subParams) // err impossible: kv has no unmarshalable fields
-	sum := sha256.Sum256(raw)
-	return def.Key + ":" + base64.RawURLEncoding.EncodeToString(sum[:12])
-}
--- a/internal/event/consume/fingerprint_test.go
+++ b/internal/event/consume/fingerprint_test.go
@@ -1,126 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package consume
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/larksuite/cli/internal/event"
-)
-
-func TestComputeSubscriptionID(t *testing.T) {
-	makeDef := func(subKeyNames ...string) *event.KeyDefinition {
-		def := &event.KeyDefinition{Key: "test.evt"}
-		marked := make(map[string]bool, len(subKeyNames))
-		for _, n := range subKeyNames {
-			marked[n] = true
-		}
-		for _, n := range []string{"alpha", "beta", "gamma"} {
-			def.Params = append(def.Params, event.ParamDef{Name: n, SubscriptionKey: marked[n]})
-		}
-		return def
-	}
-
-	t.Run("no SubscriptionKey params returns EventKey verbatim", func(t *testing.T) {
-		def := makeDef()
-		got := ComputeSubscriptionID(def, map[string]string{"alpha": "x", "beta": "y"})
-		if got != "test.evt" {
-			t.Errorf("got %q, want %q", got, "test.evt")
-		}
-	})
-
-	t.Run("single SubscriptionKey param: non-sub params do not leak into ID", func(t *testing.T) {
-		def := makeDef("alpha")
-		id1 := ComputeSubscriptionID(def, map[string]string{"alpha": "value1", "beta": "ignored"})
-		id2 := ComputeSubscriptionID(def, map[string]string{"alpha": "value1", "beta": "different"})
-		if id1 != id2 {
-			t.Errorf("non-SubscriptionKey param change leaked into ID: %q vs %q", id1, id2)
-		}
-	})
-
-	t.Run("different SubscriptionKey value produces different ID", func(t *testing.T) {
-		def := makeDef("alpha")
-		id1 := ComputeSubscriptionID(def, map[string]string{"alpha": "v1"})
-		id2 := ComputeSubscriptionID(def, map[string]string{"alpha": "v2"})
-		if id1 == id2 {
-			t.Errorf("different values produced same ID: %q", id1)
-		}
-	})
-}
-
-func TestComputeSubscriptionID_Stability(t *testing.T) {
-	// Param order in the ParamDef list must not affect the result (sorted by name internally).
-	def1 := &event.KeyDefinition{
-		Key: "test.evt",
-		Params: []event.ParamDef{
-			{Name: "b", SubscriptionKey: true},
-			{Name: "a", SubscriptionKey: true},
-		},
-	}
-	def2 := &event.KeyDefinition{
-		Key: "test.evt",
-		Params: []event.ParamDef{
-			{Name: "a", SubscriptionKey: true},
-			{Name: "b", SubscriptionKey: true},
-		},
-	}
-	id1 := ComputeSubscriptionID(def1, map[string]string{"a": "1", "b": "2"})
-	id2 := ComputeSubscriptionID(def2, map[string]string{"a": "1", "b": "2"})
-	if id1 != id2 {
-		t.Errorf("order-sensitive: id1=%q id2=%q", id1, id2)
-	}
-}
-
-func TestComputeSubscriptionID_Format(t *testing.T) {
-	def := &event.KeyDefinition{
-		Key:    "mail.user_mailbox.event.message_received_v1",
-		Params: []event.ParamDef{{Name: "mailbox", SubscriptionKey: true}},
-	}
-	id := ComputeSubscriptionID(def, map[string]string{"mailbox": "liuxinyang@example.com"})
-	prefix := "mail.user_mailbox.event.message_received_v1:"
-	if !strings.HasPrefix(id, prefix) {
-		t.Fatalf("missing prefix: %q", id)
-	}
-	suffix := strings.TrimPrefix(id, prefix)
-	if len(suffix) != 16 {
-		t.Errorf("fingerprint length = %d, want 16", len(suffix))
-	}
-	for _, c := range suffix {
-		isValid := (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '-' || c == '_'
-		if !isValid {
-			t.Errorf("non-base64URL char in fingerprint: %q", suffix)
-			break
-		}
-	}
-}
-
-func TestComputeSubscriptionID_UnicodeAndSpecialChars(t *testing.T) {
-	def := &event.KeyDefinition{
-		Key:    "test.evt",
-		Params: []event.ParamDef{{Name: "value", SubscriptionKey: true}},
-	}
-	for _, val := range []string{"中文", "emoji🚀", "with spaces", "with:colons", "with\"quotes"} {
-		id := ComputeSubscriptionID(def, map[string]string{"value": val})
-		if !strings.HasPrefix(id, "test.evt:") || len(id) != len("test.evt:")+16 {
-			t.Errorf("ID malformed for value=%q: %q (len=%d)", val, id, len(id))
-		}
-	}
-}
-
-func TestComputeSubscriptionID_EmptyValue(t *testing.T) {
-	def := &event.KeyDefinition{
-		Key:    "test.evt",
-		Params: []event.ParamDef{{Name: "x", SubscriptionKey: true}},
-	}
-	id1 := ComputeSubscriptionID(def, map[string]string{"x": ""})
-	id2 := ComputeSubscriptionID(def, map[string]string{}) // missing entirely
-	if id1 != id2 {
-		t.Errorf("empty value should be indistinguishable from missing: %q vs %q", id1, id2)
-	}
-	id3 := ComputeSubscriptionID(def, map[string]string{"x": "nonempty"})
-	if id1 == id3 {
-		t.Errorf("empty and nonempty produced same ID: %q", id1)
-	}
-}
--- a/internal/event/consume/handshake.go
+++ b/internal/event/consume/handshake.go
@@ -18,8 +18,8 @@ const helloAckTimeout = 5 * time.Second // symmetric with bus-side hello read de

 // doHello returns a bufio.Reader holding any bytes already pulled off conn so events
 // buffered with the ack in one TCP segment aren't dropped.
-func doHello(conn net.Conn, eventKey string, eventTypes []string, subscriptionID string) (*protocol.HelloAck, *bufio.Reader, error) {
-	hello := protocol.NewHello(os.Getpid(), eventKey, eventTypes, "v1", subscriptionID)
+func doHello(conn net.Conn, eventKey string, eventTypes []string) (*protocol.HelloAck, *bufio.Reader, error) {
+	hello := protocol.NewHello(os.Getpid(), eventKey, eventTypes, "v1")
 	if err := protocol.EncodeWithDeadline(conn, hello, protocol.WriteTimeout); err != nil {
 		return nil, nil, err
 	}
--- a/internal/event/consume/handshake_test.go
+++ b/internal/event/consume/handshake_test.go
@@ -27,7 +27,7 @@ func TestDoHello_ReadDeadline(t *testing.T) {
 	start := time.Now()
 	done := make(chan error, 1)
 	go func() {
-		_, _, err := doHello(client, "im.msg", []string{"im.msg"}, "")
+		_, _, err := doHello(client, "im.msg", []string{"im.msg"})
 		done <- err
 	}()

--- a/internal/event/consume/jq.go
+++ b/internal/event/consume/jq.go
@@ -8,21 +8,17 @@ import (
 	"fmt"

 	"github.com/itchyny/gojq"
-
-	"github.com/larksuite/cli/errs"
 )

 // CompileJQ compiles once for hot-path reuse; exported so callers can preflight before side effects.
 func CompileJQ(expr string) (*gojq.Code, error) {
 	query, err := gojq.Parse(expr)
 	if err != nil {
-		return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"invalid jq expression: %s", err).WithParam("--jq").WithCause(err)
+		return nil, fmt.Errorf("invalid jq expression: %w", err)
 	}
 	code, err := gojq.Compile(query)
 	if err != nil {
-		return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
-			"jq compile error: %s", err).WithParam("--jq").WithCause(err)
+		return nil, fmt.Errorf("jq compile error: %w", err)
 	}
 	return code, nil
 }
--- a/internal/event/consume/listening_text_test.go
+++ b/internal/event/consume/listening_text_test.go
@@ -50,32 +50,12 @@ func TestListeningText_NonTTY_MaxEventsAndTimeout(t *testing.T) {
 }

 // AI-facing contract: must name "kill -9" + "cleanup" so agents parsing stderr are steered away from SIGKILL.
-func TestStopHintText_Unbounded(t *testing.T) {
-	got := stopHintText(Options{})
-	mustContain := []string{"SIGTERM", "kill -9", "cleanup", "close stdin"}
+func TestStopHintText_Content(t *testing.T) {
+	got := stopHintText()
+	mustContain := []string{"SIGTERM", "kill -9", "cleanup"}
 	for _, s := range mustContain {
 		if !bytes.Contains([]byte(got), []byte(s)) {
-			t.Errorf("stopHintText(unbounded) missing %q; got %q", s, got)
-		}
-	}
-}
-
-// AI-facing contract: must name "kill -9" + "cleanup" so agents parsing stderr are steered away from SIGKILL.
-func TestStopHintText_Bounded(t *testing.T) {
-	cases := []Options{
-		{MaxEvents: 1},
-		{Timeout: 30 * time.Second},
-	}
-	for _, opts := range cases {
-		got := stopHintText(opts)
-		mustContain := []string{"SIGTERM", "kill -9", "cleanup"}
-		for _, s := range mustContain {
-			if !bytes.Contains([]byte(got), []byte(s)) {
-				t.Errorf("stopHintText(bounded) missing %q; got %q", s, got)
-			}
-		}
-		if bytes.Contains([]byte(got), []byte("close stdin")) {
-			t.Errorf("stopHintText(bounded) must not contain \"close stdin\"; got %q", got)
+			t.Errorf("stopHintText missing %q; got %q", s, got)
 		}
 	}
 }
--- a/internal/event/consume/loop.go
+++ b/internal/event/consume/loop.go
@@ -22,7 +22,7 @@ import (
 )

 // consumeLoop reads events and dispatches to workers; cancels on terminal sink errors.
-func consumeLoop(ctx context.Context, conn net.Conn, br *bufio.Reader, keyDef *event.KeyDefinition, opts Options, subscriptionID string, lastForKey *bool, emitted *atomic.Int64) error {
+func consumeLoop(ctx context.Context, conn net.Conn, br *bufio.Reader, keyDef *event.KeyDefinition, opts Options, lastForKey *bool, emitted *atomic.Int64) error {
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()

@@ -185,7 +185,7 @@ func consumeLoop(ctx context.Context, conn net.Conn, br *bufio.Reader, keyDef *e
 		close(stopReader)
 		<-readerDone
 		conn.SetReadDeadline(time.Time{})
-		*lastForKey = checkLastForKey(conn, opts.EventKey, subscriptionID)
+		*lastForKey = checkLastForKey(conn, opts.EventKey)
 		conn.Close()
 	case <-allDone:
 		// bus-side close; can't query, assume last
@@ -199,19 +199,13 @@ func consumeLoop(ctx context.Context, conn net.Conn, br *bufio.Reader, keyDef *e

 // processAndOutput returns (wrote, err); err non-nil only for sink.Write failures.
 func processAndOutput(ctx context.Context, keyDef *event.KeyDefinition, evt *protocol.Event, opts Options, sink Sink, jqCode *gojq.Code) (bool, error) {
-	raw := &event.RawEvent{
-		EventType: evt.EventType,
-		Payload:   evt.Payload,
-	}
-
-	// Synchronous Match filter runs before any work (Process / sink write).
-	if keyDef.Match != nil && !keyDef.Match(raw, opts.Params) {
-		return false, nil
-	}
-
 	var result json.RawMessage

 	if keyDef.Process != nil {
+		raw := &event.RawEvent{
+			EventType: evt.EventType,
+			Payload:   evt.Payload,
+		}
 		var err error
 		result, err = keyDef.Process(ctx, opts.Runtime, raw, opts.Params)
 		if err != nil {
--- a/internal/event/consume/loop_jq_test.go
+++ b/internal/event/consume/loop_jq_test.go
@@ -5,13 +5,10 @@ package consume

 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"strings"
 	"sync"
 	"testing"
-
-	"github.com/larksuite/cli/errs"
 )

 func TestCompileJQReportsErrorEarly(t *testing.T) {
@@ -23,16 +20,6 @@ func TestCompileJQReportsErrorEarly(t *testing.T) {
 	if !strings.Contains(msg, "compile") && !strings.Contains(msg, "parse") && !strings.Contains(msg, "invalid") {
 		t.Errorf("error should mention compile/parse/invalid, got: %v", err)
 	}
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Subtype != errs.SubtypeInvalidArgument || ve.Param != "--jq" {
-		t.Errorf("subtype/param = %s/%q, want %s/%q", ve.Subtype, ve.Param, errs.SubtypeInvalidArgument, "--jq")
-	}
-	if errors.Unwrap(err) == nil {
-		t.Error("compile error should preserve its cause")
-	}
 }

 func TestCompileJQReturnsUsableCode(t *testing.T) {
--- a/internal/event/consume/loop_test.go
+++ b/internal/event/consume/loop_test.go
@@ -89,7 +89,7 @@ func TestConsumeLoop_DeliversEventsAndExitsOnMaxEvents(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()

-	err := consumeLoop(ctx, client, bufio.NewReader(client), echoKeyDef("test.key"), opts, "", &lastForKey, &emitted)
+	err := consumeLoop(ctx, client, bufio.NewReader(client), echoKeyDef("test.key"), opts, &lastForKey, &emitted)
 	if err != nil {
 		t.Fatalf("consumeLoop: %v", err)
 	}
@@ -132,7 +132,7 @@ func TestConsumeLoop_SeqGapEmitsWarning(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()

-	if err := consumeLoop(ctx, client, bufio.NewReader(client), echoKeyDef("test.key"), opts, "", &lastForKey, &emitted); err != nil {
+	if err := consumeLoop(ctx, client, bufio.NewReader(client), echoKeyDef("test.key"), opts, &lastForKey, &emitted); err != nil {
 		t.Fatalf("consumeLoop: %v", err)
 	}
 	if got := emitted.Load(); got != 2 {
@@ -169,7 +169,7 @@ func TestConsumeLoop_JQFilterAppliedPerEvent(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()

-	if err := consumeLoop(ctx, client, bufio.NewReader(client), echoKeyDef("test.key"), opts, "", &lastForKey, &emitted); err != nil {
+	if err := consumeLoop(ctx, client, bufio.NewReader(client), echoKeyDef("test.key"), opts, &lastForKey, &emitted); err != nil {
 		t.Fatalf("consumeLoop: %v", err)
 	}
 	if got := emitted.Load(); got != 1 {
@@ -196,96 +196,12 @@ func TestConsumeLoop_CompileJQFailsEarly(t *testing.T) {

 	var lastForKey bool
 	var emitted atomic.Int64
-	err := consumeLoop(context.Background(), client, bufio.NewReader(client), echoKeyDef("test.key"), opts, "", &lastForKey, &emitted)
+	err := consumeLoop(context.Background(), client, bufio.NewReader(client), echoKeyDef("test.key"), opts, &lastForKey, &emitted)
 	if err == nil {
 		t.Fatal("consumeLoop should fail immediately on bad jq expression")
 	}
 }

-// captureSink is a minimal Sink for unit-testing processAndOutput directly.
-type captureSink struct {
-	written []json.RawMessage
-}
-
-func (s *captureSink) Write(data json.RawMessage) error {
-	s.written = append(s.written, data)
-	return nil
-}
-
-func TestProcessAndOutput_Match_DropsEvent(t *testing.T) {
-	calledProcess := false
-	keyDef := &event.KeyDefinition{
-		Key: "test.evt",
-		Match: func(raw *event.RawEvent, params map[string]string) bool {
-			return false
-		},
-		Process: func(ctx context.Context, rt event.APIClient, raw *event.RawEvent, params map[string]string) (json.RawMessage, error) {
-			calledProcess = true
-			return json.RawMessage(`{}`), nil
-		},
-	}
-	sink := &captureSink{}
-	wrote, err := processAndOutput(context.Background(), keyDef,
-		&protocol.Event{Type: protocol.MsgTypeEvent, EventType: "test.evt", Payload: json.RawMessage(`{"x":1}`)},
-		Options{}, sink, nil)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if wrote {
-		t.Error("Match returned false but event was written")
-	}
-	if calledProcess {
-		t.Error("Process was called even though Match returned false")
-	}
-	if len(sink.written) != 0 {
-		t.Errorf("sink received %d events, want 0", len(sink.written))
-	}
-}
-
-func TestProcessAndOutput_Match_NilAcceptsAll(t *testing.T) {
-	keyDef := &event.KeyDefinition{Key: "test.evt"} // no Match, no Process
-	sink := &captureSink{}
-	wrote, err := processAndOutput(context.Background(), keyDef,
-		&protocol.Event{Type: protocol.MsgTypeEvent, EventType: "test.evt", Payload: json.RawMessage(`{"x":1}`)},
-		Options{}, sink, nil)
-	if err != nil || !wrote {
-		t.Errorf("expected wrote=true err=nil; got wrote=%v err=%v", wrote, err)
-	}
-	if len(sink.written) != 1 {
-		t.Errorf("sink received %d events, want 1", len(sink.written))
-	}
-}
-
-func TestProcessAndOutput_Match_RunsBeforeProcess(t *testing.T) {
-	// Record the actual call sequence — a bare call-count check would still
-	// pass if Process ran before Match.
-	var order []string
-	keyDef := &event.KeyDefinition{
-		Key: "test.evt",
-		Match: func(raw *event.RawEvent, params map[string]string) bool {
-			order = append(order, "match")
-			return true
-		},
-		Process: func(ctx context.Context, rt event.APIClient, raw *event.RawEvent, params map[string]string) (json.RawMessage, error) {
-			order = append(order, "process")
-			return raw.Payload, nil
-		},
-	}
-	sink := &captureSink{}
-	wrote, err := processAndOutput(context.Background(), keyDef,
-		&protocol.Event{Type: protocol.MsgTypeEvent, EventType: "test.evt", Payload: json.RawMessage(`{}`)},
-		Options{}, sink, nil)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !wrote {
-		t.Error("expected wrote=true")
-	}
-	if len(order) != 2 || order[0] != "match" || order[1] != "process" {
-		t.Errorf("call order = %v, want [match process]", order)
-	}
-}
-
 func TestIsTerminalSinkError(t *testing.T) {
 	for _, tc := range []struct {
 		name string
--- a/internal/event/consume/shutdown.go
+++ b/internal/event/consume/shutdown.go
@@ -16,8 +16,8 @@ const preShutdownAckTimeout = 2 * time.Second

 // checkLastForKey atomically reserves a cleanup lock; on any error defaults to true
 // (cleanup-on-error is safer than leaking server state). Discards non-ack frames in flight.
-func checkLastForKey(conn net.Conn, eventKey string, subscriptionID string) bool {
-	msg := protocol.NewPreShutdownCheck(eventKey, subscriptionID)
+func checkLastForKey(conn net.Conn, eventKey string) bool {
+	msg := protocol.NewPreShutdownCheck(eventKey)
 	if err := protocol.EncodeWithDeadline(conn, msg, protocol.WriteTimeout); err != nil {
 		return true
 	}
--- a/internal/event/consume/shutdown_test.go
+++ b/internal/event/consume/shutdown_test.go
@@ -4,8 +4,6 @@
 package consume

 import (
-	"bufio"
-	"bytes"
 	"encoding/json"
 	"io"
 	"net"
@@ -40,7 +38,7 @@ func TestCheckLastForKey_IgnoresNonAckFrames(t *testing.T) {
 		}
 	}()

-	got := checkLastForKey(client, "im.msg", "")
+	got := checkLastForKey(client, "im.msg")
 	if got != false {
 		t.Errorf("checkLastForKey = %v, want false", got)
 	}
@@ -64,7 +62,7 @@ func TestCheckLastForKey_ReturnsAckValue(t *testing.T) {
 		_ = protocol.Encode(server, ack)
 	}()

-	got := checkLastForKey(client, "im.msg", "")
+	got := checkLastForKey(client, "im.msg")
 	if got != true {
 		t.Errorf("checkLastForKey = %v, want true", got)
 	}
@@ -85,7 +83,7 @@ func TestCheckLastForKey_DefaultsToTrueOnTimeout(t *testing.T) {
 	}()

 	start := time.Now()
-	got := checkLastForKey(client, "im.msg", "")
+	got := checkLastForKey(client, "im.msg")
 	elapsed := time.Since(start)

 	if got != true {
@@ -95,39 +93,3 @@ func TestCheckLastForKey_DefaultsToTrueOnTimeout(t *testing.T) {
 		t.Errorf("elapsed = %v, expected ~%v (timeout-bounded)", elapsed, preShutdownAckTimeout)
 	}
 }
-
-func TestCheckLastForKey_SendsSubscriptionID(t *testing.T) {
-	a, b := net.Pipe()
-	defer a.Close()
-	defer b.Close()
-
-	done := make(chan string, 1)
-	go func() {
-		br := bufio.NewReader(b)
-		line, err := protocol.ReadFrame(br)
-		if err != nil {
-			done <- "READ_ERR"
-			return
-		}
-		msg, err := protocol.Decode(bytes.TrimRight(line, "\n"))
-		if err != nil {
-			done <- "DECODE_ERR"
-			return
-		}
-		check, ok := msg.(*protocol.PreShutdownCheck)
-		if !ok {
-			done <- "WRONG_TYPE"
-			return
-		}
-		done <- check.SubscriptionID
-		// Reply with ack so client returns
-		ack := protocol.NewPreShutdownAck(true)
-		_ = protocol.EncodeWithDeadline(b, ack, protocol.WriteTimeout)
-	}()
-
-	_ = checkLastForKey(a, "mail.x", "mail.x:alice")
-	got := <-done
-	if got != "mail.x:alice" {
-		t.Errorf("PreShutdownCheck.SubscriptionID on wire = %q, want %q", got, "mail.x:alice")
-	}
-}
--- a/internal/event/consume/sink.go
+++ b/internal/event/consume/sink.go
@@ -13,7 +13,6 @@ import (
 	"sync/atomic"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/vfs"
 )

@@ -24,8 +23,7 @@ type Sink interface {
 func newSink(opts Options) (Sink, error) {
 	if opts.OutputDir != "" {
 		if err := vfs.MkdirAll(opts.OutputDir, 0755); err != nil {
-			return nil, errs.NewInternalError(errs.SubtypeFileIO,
-				"create output dir: %s", err).WithCause(err)
+			return nil, fmt.Errorf("create output dir: %w", err)
 		}
 		// PID disambiguates filenames across processes sharing a Dir.
 		return &DirSink{Dir: opts.OutputDir, pid: os.Getpid()}, nil
--- a/internal/event/consume/startup.go
+++ b/internal/event/consume/startup.go
@@ -16,7 +16,6 @@ import (
 	"path/filepath"
 	"time"

-	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/core"
 	"github.com/larksuite/cli/internal/event"
 	"github.com/larksuite/cli/internal/event/protocol"
@@ -52,9 +51,10 @@ func EnsureBus(ctx context.Context, tr transport.IPC, appID, profileName, domain
 		} else {
 			fmt.Fprintf(errOut, "[event] remote connection check: online_instance_cnt=%d\n", count)
 			if count > 0 {
-				return nil, errs.NewValidationError(errs.SubtypeFailedPrecondition,
-					"another event bus is already connected to this app (%d active connection(s) detected via API); only one bus should run globally to avoid duplicate event delivery", count).
-					WithHint("use `lark-cli event status` to check, or `lark-cli event stop` on the other machine first")
+				return nil, fmt.Errorf("another event bus is already connected to this app "+
+					"(%d active connection(s) detected via API).\n"+
+					"Only one bus should run globally to avoid duplicate event delivery.\n"+
+					"Use 'lark-cli event status' to check, or 'lark-cli event stop' on the other machine first", count)
 			}
 		}
 	} else {
@@ -65,10 +65,8 @@ func EnsureBus(ctx context.Context, tr transport.IPC, appID, profileName, domain
 	pid, forkErr := forkBus(tr, appID, profileName, domain)
 	if forkErr != nil && !errors.Is(forkErr, lockfile.ErrHeld) {
 		eventsRoot := filepath.Join(core.GetConfigDir(), "events")
-		return nil, errs.NewInternalError(errs.SubtypeUnknown,
-			"failed to start event bus daemon: %s", forkErr).
-			WithCause(forkErr).
-			WithHint("check disk space, permissions on %s, and `lark-cli doctor`", eventsRoot)
+		return nil, fmt.Errorf("failed to start event bus daemon: %w\n"+
+			"Check: disk space, permissions on %s, and 'lark-cli doctor'", forkErr, eventsRoot)
 	}
 	if pid > 0 {
 		announceForkedBus(errOut, pid)
@@ -90,9 +88,7 @@ func EnsureBus(ctx context.Context, tr transport.IPC, appID, profileName, domain
 	fmt.Fprintln(errOut, "[event] event bus exited unexpectedly.")
 	fmt.Fprintln(errOut, "[event] please check app credentials (lark-cli config show) and retry.")
 	fmt.Fprintf(errOut, "[event] logs: %s\n", logPath)
-	return nil, errs.NewInternalError(errs.SubtypeUnknown,
-		"failed to connect to event bus within %v (app=%s)", dialTimeout, appID).
-		WithHint("check app credentials (`lark-cli config show`) and retry; bus logs: %s", logPath)
+	return nil, fmt.Errorf("failed to connect to event bus within %v (app=%s)", dialTimeout, appID)
 }

 // probeAndDialBus distinguishes a healthy bus from a mid-shutdown listener via StatusQuery first.
--- a/internal/event/consume/startup_guard_test.go
+++ b/internal/event/consume/startup_guard_test.go
@@ -1,99 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package consume
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"io"
-	"net"
-	"strconv"
-	"strings"
-	"testing"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/event"
-)
-
-// failDialTransport refuses every dial so EnsureBus falls through to the
-// remote-connection check without a local bus.
-type failDialTransport struct{}
-
-func (failDialTransport) Listen(string) (net.Listener, error) { return nil, errors.New("no listen") }
-func (failDialTransport) Dial(string) (net.Conn, error)       { return nil, errors.New("refused") }
-func (failDialTransport) Address(string) string               { return "guard-test-addr" }
-func (failDialTransport) Cleanup(string)                      {}
-
-// remoteBusyAPIClient reports active remote WebSocket connections.
-type remoteBusyAPIClient struct{ count int }
-
-func (c remoteBusyAPIClient) CallAPI(context.Context, string, string, interface{}) (json.RawMessage, error) {
-	return json.RawMessage(`{"code":0,"msg":"ok","data":{"online_instance_cnt":` +
-		strconv.Itoa(c.count) + `}}`), nil
-}
-
-func TestEnsureBus_RemoteBusAlreadyConnectedIsFailedPrecondition(t *testing.T) {
-	conn, err := EnsureBus(context.Background(), failDialTransport{},
-		"cli_guard_test", "", "", remoteBusyAPIClient{count: 2}, io.Discard)
-	if conn != nil {
-		t.Fatal("expected nil conn when a remote bus is already connected")
-	}
-	if err == nil {
-		t.Fatal("expected single-bus guard error")
-	}
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Subtype != errs.SubtypeFailedPrecondition {
-		t.Errorf("subtype = %s, want %s", ve.Subtype, errs.SubtypeFailedPrecondition)
-	}
-	if !strings.Contains(ve.Hint, "event stop") {
-		t.Errorf("hint should point at `event stop`, got: %q", ve.Hint)
-	}
-}
-
-func TestRun_UnknownEventKeyIsTypedValidation(t *testing.T) {
-	err := Run(context.Background(), failDialTransport{}, "cli_x", "", "", Options{
-		EventKey: "bogus.run.key",
-		ErrOut:   io.Discard,
-	})
-	if err == nil {
-		t.Fatal("expected unknown EventKey error")
-	}
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Subtype != errs.SubtypeInvalidArgument {
-		t.Errorf("subtype = %s, want %s", ve.Subtype, errs.SubtypeInvalidArgument)
-	}
-	if !strings.Contains(ve.Hint, "event list") {
-		t.Errorf("hint should point at `event list`, got: %q", ve.Hint)
-	}
-}
-
-func TestRun_InvalidJQFailsBeforeAnySideEffect(t *testing.T) {
-	event.RegisterKey(event.KeyDefinition{
-		Key:       "consume.runtest.jq",
-		EventType: "consume.runtest.jq_v1",
-		Schema:    event.SchemaDef{Custom: &event.SchemaSpec{Raw: json.RawMessage(`{}`)}},
-	})
-	err := Run(context.Background(), failDialTransport{}, "cli_x", "", "", Options{
-		EventKey: "consume.runtest.jq",
-		JQExpr:   "[invalid{{{",
-		ErrOut:   io.Discard,
-	})
-	if err == nil {
-		t.Fatal("expected jq validation error")
-	}
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Param != "--jq" {
-		t.Errorf("param = %q, want %q", ve.Param, "--jq")
-	}
-}
--- a/internal/event/consume/validate_params_test.go
+++ b/internal/event/consume/validate_params_test.go
@@ -1,64 +0,0 @@
-// Copyright (c) 2026 Lark Technologies Pte. Ltd.
-// SPDX-License-Identifier: MIT
-
-package consume
-
-import (
-	"errors"
-	"testing"
-
-	"github.com/larksuite/cli/errs"
-	"github.com/larksuite/cli/internal/event"
-)
-
-func requireParamValidationError(t *testing.T, err error) {
-	t.Helper()
-	if err == nil {
-		t.Fatal("expected validation error, got nil")
-	}
-	var ve *errs.ValidationError
-	if !errors.As(err, &ve) {
-		t.Fatalf("expected *errs.ValidationError, got %T: %v", err, err)
-	}
-	if ve.Subtype != errs.SubtypeInvalidArgument || ve.Param != "--param" {
-		t.Errorf("subtype/param = %s/%q, want %s/%q", ve.Subtype, ve.Param, errs.SubtypeInvalidArgument, "--param")
-	}
-	if ve.Hint == "" {
-		t.Error("param validation error should hint at `lark-cli event schema`")
-	}
-}
-
-func TestValidateParams_RequiredMissing(t *testing.T) {
-	def := &event.KeyDefinition{
-		Key:    "x.test",
-		Params: []event.ParamDef{{Name: "chat_id", Required: true}},
-	}
-	requireParamValidationError(t, validateParams(def, map[string]string{}))
-}
-
-func TestValidateParams_UnknownParam(t *testing.T) {
-	def := &event.KeyDefinition{
-		Key:    "x.test",
-		Params: []event.ParamDef{{Name: "chat_id"}},
-	}
-	requireParamValidationError(t, validateParams(def, map[string]string{"nope": "1"}))
-}
-
-func TestValidateParams_UnknownParamNoParamsAccepted(t *testing.T) {
-	def := &event.KeyDefinition{Key: "x.test"}
-	requireParamValidationError(t, validateParams(def, map[string]string{"nope": "1"}))
-}
-
-func TestValidateParams_DefaultAppliedAndValidPasses(t *testing.T) {
-	def := &event.KeyDefinition{
-		Key:    "x.test",
-		Params: []event.ParamDef{{Name: "mode", Required: true, Default: "all"}},
-	}
-	params := map[string]string{}
-	if err := validateParams(def, params); err != nil {
-		t.Fatalf("default should satisfy required param, got: %v", err)
-	}
-	if params["mode"] != "all" {
-		t.Errorf("default not applied, params=%v", params)
-	}
-}
--- a/internal/event/protocol/codec_test.go
+++ b/internal/event/protocol/codec_test.go
@@ -77,88 +77,3 @@ func TestDecodeUnknownType(t *testing.T) {
 		t.Error("expected error for unknown type")
 	}
 }
-
-func TestEncodeDecodeHello_WithSubscriptionID(t *testing.T) {
-	msg := &Hello{
-		Type:           MsgTypeHello,
-		PID:            12345,
-		EventKey:       "mail.user_mailbox.event.message_received_v1",
-		EventTypes:     []string{"mail.user_mailbox.event.message_received_v1"},
-		Version:        "v1",
-		SubscriptionID: "mail.user_mailbox.event.message_received_v1:a7Bx9Kp2Lm3Qv4Rs",
-	}
-	buf := &bytes.Buffer{}
-	if err := Encode(buf, msg); err != nil {
-		t.Fatal(err)
-	}
-	line := buf.Bytes()
-	if !bytes.Contains(line, []byte(`"subscription_id":"mail.user_mailbox.event.message_received_v1:a7Bx9Kp2Lm3Qv4Rs"`)) {
-		t.Errorf("subscription_id not serialized: %s", string(line))
-	}
-	decoded, err := Decode(bytes.TrimRight(line, "\n"))
-	if err != nil {
-		t.Fatal(err)
-	}
-	hello, ok := decoded.(*Hello)
-	if !ok {
-		t.Fatalf("expected *Hello, got %T", decoded)
-	}
-	if hello.SubscriptionID != msg.SubscriptionID {
-		t.Errorf("roundtrip subscription_id: got %q want %q", hello.SubscriptionID, msg.SubscriptionID)
-	}
-}
-
-func TestEncodeDecodeHello_EmptySubscriptionIDOmitted(t *testing.T) {
-	msg := &Hello{
-		Type:       MsgTypeHello,
-		PID:        1,
-		EventKey:   "k",
-		EventTypes: []string{"k"},
-		Version:    "v1",
-	}
-	buf := &bytes.Buffer{}
-	if err := Encode(buf, msg); err != nil {
-		t.Fatal(err)
-	}
-	if bytes.Contains(buf.Bytes(), []byte("subscription_id")) {
-		t.Errorf("empty subscription_id should be omitted: %s", buf.String())
-	}
-	decoded, _ := Decode(bytes.TrimRight(buf.Bytes(), "\n"))
-	hello := decoded.(*Hello)
-	if hello.SubscriptionID != "" {
-		t.Errorf("got %q, want empty", hello.SubscriptionID)
-	}
-}
-
-func TestEncodeDecodePreShutdownCheck_WithSubscriptionID(t *testing.T) {
-	msg := &PreShutdownCheck{
-		Type:           MsgTypePreShutdownCheck,
-		EventKey:       "mail.x",
-		SubscriptionID: "mail.x:abc",
-	}
-	buf := &bytes.Buffer{}
-	if err := Encode(buf, msg); err != nil {
-		t.Fatal(err)
-	}
-	decoded, err := Decode(bytes.TrimRight(buf.Bytes(), "\n"))
-	if err != nil {
-		t.Fatal(err)
-	}
-	got := decoded.(*PreShutdownCheck)
-	if got.SubscriptionID != msg.SubscriptionID {
-		t.Errorf("roundtrip: got %q want %q", got.SubscriptionID, msg.SubscriptionID)
-	}
-}
-
-func TestStatusResponse_ConsumerInfo_SubscriptionID(t *testing.T) {
-	msg := NewStatusResponse(7, 120, 1, []ConsumerInfo{
-		{PID: 99, EventKey: "mail.x", SubscriptionID: "mail.x:abc", Received: 5, Dropped: 0},
-	})
-	buf := &bytes.Buffer{}
-	if err := Encode(buf, msg); err != nil {
-		t.Fatal(err)
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"subscription_id":"mail.x:abc"`)) {
-		t.Errorf("ConsumerInfo.SubscriptionID missing from JSON: %s", buf.String())
-	}
-}
--- a/internal/event/protocol/messages.go
+++ b/internal/event/protocol/messages.go
@@ -34,12 +34,11 @@ type SourceStatus struct {
 }

 type Hello struct {
-	Type           string   `json:"type"`
-	PID            int      `json:"pid"`
-	EventKey       string   `json:"event_key"`
-	EventTypes     []string `json:"event_types"`
-	Version        string   `json:"version"`
-	SubscriptionID string   `json:"subscription_id,omitempty"` // empty = fallback to EventKey on bus side
+	Type       string   `json:"type"`
+	PID        int      `json:"pid"`
+	EventKey   string   `json:"event_key"`
+	EventTypes []string `json:"event_types"`
+	Version    string   `json:"version"`
 }

 type HelloAck struct {
@@ -62,11 +61,10 @@ type Bye struct {
 	Type string `json:"type"`
 }

-// PreShutdownCheck atomically reserves the cleanup lock for (EventKey, SubscriptionID).
+// PreShutdownCheck atomically reserves the cleanup lock for EventKey.
 type PreShutdownCheck struct {
-	Type           string `json:"type"`
-	EventKey       string `json:"event_key"`
-	SubscriptionID string `json:"subscription_id,omitempty"` // empty = fallback to EventKey
+	Type     string `json:"type"`
+	EventKey string `json:"event_key"`
 }

 type PreShutdownAck struct {
@@ -79,11 +77,10 @@ type StatusQuery struct {
 }

 type ConsumerInfo struct {
-	PID            int    `json:"pid"`
-	EventKey       string `json:"event_key"`
-	SubscriptionID string `json:"subscription_id,omitempty"`
-	Received       int64  `json:"received"`
-	Dropped        int64  `json:"dropped"`
+	PID      int    `json:"pid"`
+	EventKey string `json:"event_key"`
+	Received int64  `json:"received"`
+	Dropped  int64  `json:"dropped"`
 }

 type StatusResponse struct {
@@ -98,14 +95,13 @@ type Shutdown struct {
 	Type string `json:"type"`
 }

-func NewHello(pid int, eventKey string, eventTypes []string, version string, subscriptionID string) *Hello {
+func NewHello(pid int, eventKey string, eventTypes []string, version string) *Hello {
 	return &Hello{
-		Type:           MsgTypeHello,
-		PID:            pid,
-		EventKey:       eventKey,
-		EventTypes:     eventTypes,
-		Version:        version,
-		SubscriptionID: subscriptionID,
+		Type:       MsgTypeHello,
+		PID:        pid,
+		EventKey:   eventKey,
+		EventTypes: eventTypes,
+		Version:    version,
 	}
 }

@@ -128,8 +124,8 @@ func NewEvent(eventType, eventID, sourceTime string, seq uint64, payload json.Ra
 	}
 }

-func NewPreShutdownCheck(eventKey, subscriptionID string) *PreShutdownCheck {
-	return &PreShutdownCheck{Type: MsgTypePreShutdownCheck, EventKey: eventKey, SubscriptionID: subscriptionID}
+func NewPreShutdownCheck(eventKey string) *PreShutdownCheck {
+	return &PreShutdownCheck{Type: MsgTypePreShutdownCheck, EventKey: eventKey}
 }

 func NewPreShutdownAck(lastForKey bool) *PreShutdownAck {
--- a/internal/event/protocol/messages_test.go
+++ b/internal/event/protocol/messages_test.go
@@ -17,7 +17,7 @@ import (

 // Every NewXxx helper must set the Type discriminator (Decode rejects messages without it).
 func TestConstructors_PinTypeField(t *testing.T) {
-	if got := NewHello(1, "k", []string{"t"}, "v1", ""); got.Type != MsgTypeHello {
+	if got := NewHello(1, "k", []string{"t"}, "v1"); got.Type != MsgTypeHello {
 		t.Errorf("NewHello.Type = %q, want %q", got.Type, MsgTypeHello)
 	}
 	if got := NewHelloAck("v1", true); got.Type != MsgTypeHelloAck || !got.FirstForKey {
@@ -26,7 +26,7 @@ func TestConstructors_PinTypeField(t *testing.T) {
 	if got := NewEvent("im.msg", "e1", "", 7, json.RawMessage(`{}`)); got.Type != MsgTypeEvent || got.Seq != 7 {
 		t.Errorf("NewEvent mismatch: %+v", got)
 	}
-	if got := NewPreShutdownCheck("k", ""); got.Type != MsgTypePreShutdownCheck || got.EventKey != "k" {
+	if got := NewPreShutdownCheck("k"); got.Type != MsgTypePreShutdownCheck || got.EventKey != "k" {
 		t.Errorf("NewPreShutdownCheck mismatch: %+v", got)
 	}
 	if got := NewPreShutdownAck(true); got.Type != MsgTypePreShutdownAck || !got.LastForKey {
@@ -63,7 +63,7 @@ func TestEncode_DecodeRoundtripAllTypes(t *testing.T) {
 		}
 	}
 	roundtrip(t, NewHelloAck("v1", true), &HelloAck{})
-	roundtrip(t, NewPreShutdownCheck("im.msg", ""), &PreShutdownCheck{})
+	roundtrip(t, NewPreShutdownCheck("im.msg"), &PreShutdownCheck{})
 	roundtrip(t, NewPreShutdownAck(false), &PreShutdownAck{})
 	roundtrip(t, NewStatusQuery(), &StatusQuery{})
 	roundtrip(t, NewStatusResponse(7, 120, 1, []ConsumerInfo{{PID: 99, EventKey: "k"}}), &StatusResponse{})
--- a/internal/event/types.go
+++ b/internal/event/types.go
@@ -55,23 +55,6 @@ type ParamDef struct {
 	Default     string       `json:"default,omitempty"`
 	Description string       `json:"description"`
 	Values      []ParamValue `json:"values,omitempty"`
-
-	// SubscriptionKey marks this param as part of the subscription identity.
-	// Two consumers of the same EventKey but different values for any
-	// SubscriptionKey-marked param are treated as DISTINCT subscriptions:
-	// PreConsume runs once per (EventKey, SubscriptionID), cleanup runs once per
-	// (EventKey, SubscriptionID).
-	//
-	// CONTRACT: only mark a param SubscriptionKey if the EventKey's server-side
-	// subscribe/unsubscribe API is itself scoped to that resource. Lark keys the
-	// subscription record by (app, user, event_type) and overwrites it rather
-	// than reference-counting, so for a non-per-resource API the cleanup of one
-	// resource's last consumer unsubscribes the shared record and silently cuts
-	// off every other resource sharing that event_type.
-	//
-	// Default false = the param is a filter / formatting / metadata param
-	// and does not affect subscription identity.
-	SubscriptionKey bool `json:"subscription_key,omitempty"`
 }

 type ProcessFunc = func(ctx context.Context, rt APIClient, raw *RawEvent, params map[string]string) (json.RawMessage, error)
@@ -100,44 +83,10 @@ type KeyDefinition struct {

 	Schema SchemaDef `json:"schema"`

-	// NormalizeParams canonicalizes param values BEFORE fingerprint compute,
-	// PreConsume, Match, and Process. Mutates the params map in place.
-	// May call OAPI; runs once per consumer at startup.
-	//
-	// Use cases: resolve aliases ("me" -> real email, a name -> an ID),
-	// trim whitespace. On error, consume fails (no retry); caller gets the
-	// wrapped error.
-	//
-	// Default nil = no normalization, params pass through unchanged.
-	NormalizeParams func(ctx context.Context, rt APIClient, params map[string]string) error `json:"-"`
-
 	// Process required when Schema.Custom is Processed output; must be nil when Native is used.
-	//
-	// Convention: returning (nil, nil) signals "drop this event" — the
-	// consumer loop will skip writing it to sink and not advance the
-	// emitted counter. Useful for async filtering (e.g. fetch metadata,
-	// drop if folder doesn't match). For sync filters that don't need
-	// OAPI, use Match instead.
 	Process func(ctx context.Context, rt APIClient, raw *RawEvent, params map[string]string) (json.RawMessage, error) `json:"-"`

-	// Match is a synchronous payload filter run on every received event
-	// BEFORE Process. Return false to drop the event without further work.
-	//
-	// Signature deliberately omits ctx/rt to physically enforce "no OAPI
-	// calls in Match". For filters that need a metadata fetch first, use
-	// Process and return nil to drop.
-	//
-	// Default nil = accept all events.
-	Match func(raw *RawEvent, params map[string]string) bool `json:"-"`
-
-	// PreConsume runs once per (EventKey, SubscriptionID) when this consumer
-	// is first for that scope. Returns a cleanup function that the framework
-	// invokes when this consumer is the last for its scope.
-	//
-	// The cleanup's error return is honored: on nil the framework prints
-	// "[event] cleanup done."; on non-nil it prints a WARN with an
-	// idempotency note.
-	PreConsume func(ctx context.Context, rt APIClient, params map[string]string) (cleanup func() error, err error) `json:"-"`
+	PreConsume func(ctx context.Context, rt APIClient, params map[string]string) (cleanup func(), err error) `json:"-"`

 	Scopes []string `json:"scopes,omitempty"`

--- a/internal/output/lark_errors.go
+++ b/internal/output/lark_errors.go
@@ -35,12 +35,9 @@ const (
 	LarkErrAppNotInUse     = 99991662 // app is disabled in this tenant
 	LarkErrAppUnauthorized = 99991673 // app status unavailable; check installation

-	// "Wrong app credentials" code from the LEGACY TAT endpoint
-	// (/open-apis/auth/v3/tenant_access_token/internal returns 10014, "app secret
-	// invalid", instead of 99991543). Since the OAuth v3 migration the CLI mints
-	// TAT via accounts/oauth/v3/token and reports this as the OAuth invalid_client
-	// error, so it no longer emits 10014 itself; the constant + codemeta mapping
-	// are retained as a defensive fallback should 10014 still arrive.
+	// TAT-endpoint variant of the "wrong app credentials" condition.
+	// /open-apis/auth/v3/tenant_access_token/internal returns code 10014
+	// ("app secret invalid") instead of 99991543 when the secret is wrong.
 	LarkErrTATInvalidSecret = 10014

 	// Rate limit.
--- a/internal/registry/service_descriptions.json
+++ b/internal/registry/service_descriptions.json
@@ -47,10 +47,6 @@
    "en": { "title": "Minutes", "description": "Minutes content and metadata retrieval" },
    "zh": { "title": "妙记", "description": "妙记信息获取、内容查询" }
  },
-  "note": {
-    "en": { "title": "Note", "description": "Meeting note detail and unified transcript retrieval" },
-    "zh": { "title": "会议纪要", "description": "会议纪要详情与 unified 逐字稿查询" }
-  },
  "sheets": {
    "en": { "title": "Sheets", "description": "Spreadsheet operations" },
    "zh": { "title": "电子表格", "description": "电子表格操作" }
--- a/internal/selfupdate/updater.go
+++ b/internal/selfupdate/updater.go
@@ -10,13 +10,10 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io"
-	"net/http"
 	"os/exec"
 	"strings"
 	"time"

-	"github.com/larksuite/cli/internal/transport"
 	"github.com/larksuite/cli/internal/vfs"
 )

@@ -40,15 +37,9 @@ const (
 )

 const (
-	npmInstallTimeout      = 10 * time.Minute
-	skillsUpdateTimeout    = 2 * time.Minute
-	skillsIndexMaxBodySize = 1 << 20
-	verifyTimeout          = 10 * time.Second
-)
-
-var (
-	skillsIndexFetchTimeout = 10 * time.Second
-	officialSkillsIndexURL  = "https://open.feishu.cn/.well-known/skills/index.json"
+	npmInstallTimeout   = 10 * time.Minute
+	skillsUpdateTimeout = 2 * time.Minute
+	verifyTimeout       = 10 * time.Second
 )

 // DetectResult holds installation detection results.
@@ -92,7 +83,6 @@ func (r *NpmResult) CombinedOutput() string {
 type Updater struct {
 	DetectOverride           func() DetectResult
 	NpmInstallOverride       func(version string) *NpmResult
-	SkillsIndexFetchOverride func() *NpmResult
 	SkillsCommandOverride    func(args ...string) *NpmResult
 	VerifyOverride           func(expectedVersion string) error
 	RestoreAvailableOverride func() bool
@@ -163,53 +153,6 @@ func (u *Updater) RunNpmInstall(version string) *NpmResult {
 	return r
 }

-func (u *Updater) ListOfficialSkillsIndex() *NpmResult {
-	if u.SkillsIndexFetchOverride != nil {
-		return u.SkillsIndexFetchOverride()
-	}
-
-	r := &NpmResult{}
-	ctx, cancel := context.WithTimeout(context.Background(), skillsIndexFetchTimeout)
-	defer cancel()
-
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, officialSkillsIndexURL, nil)
-	if err != nil {
-		r.Err = err
-		return r
-	}
-
-	client := transport.NewHTTPClient(0)
-	client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
-		if req.URL.Scheme != "https" {
-			return fmt.Errorf("official skills index redirected to non-HTTPS URL: %s", req.URL.Redacted())
-		}
-		return nil
-	}
-	resp, err := client.Do(req)
-	if err != nil {
-		r.Err = err
-		return r
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode < http.StatusOK || resp.StatusCode >= http.StatusMultipleChoices {
-		r.Err = fmt.Errorf("official skills index returned HTTP %d", resp.StatusCode)
-		return r
-	}
-
-	limited := io.LimitReader(resp.Body, skillsIndexMaxBodySize+1)
-	if _, err := io.Copy(&r.Stdout, limited); err != nil {
-		r.Err = err
-		return r
-	}
-	if r.Stdout.Len() > skillsIndexMaxBodySize {
-		r.Stdout.Reset()
-		r.Err = fmt.Errorf("official skills index exceeds %d bytes", skillsIndexMaxBodySize)
-		return r
-	}
-	return r
-}
-
 func (u *Updater) ListOfficialSkills() *NpmResult {
 	r := u.runSkillsListOfficial("https://open.feishu.cn")
 	if r.Err != nil {
--- a/Show More
+++ b/Show More