refactor: move plugin packages under internal

AGENTS.md

@@ -12,7 +12,7 @@ go run ./cmd/memos --port 8081    # Start dev server
 go test ./...                      # Run all tests
 go test -v ./store/...             # Run store tests (all 3 DB drivers via TestContainers)
 go test -v -race ./server/...      # Run server tests with race detection
-go test -v -race ./plugin/...      # Run plugin tests with race detection
+go test -v -race ./internal/...    # Run internal package tests with race detection
 go test -v -run TestFoo ./pkg/...  # Run a single test
 go mod tidy -go=1.26.1             # Match CI tidy check
 golangci-lint run                  # Lint (v2, config: .golangci.yaml)
@@ -62,8 +62,8 @@ proto/
 ├── store/                  # Internal storage messages
 └── gen/                    # Generated Go, TypeScript, OpenAPI
 
-plugin/                     # scheduler, cron, email, filter (CEL), webhook,
-                            # markdown (Goldmark), httpgetter, idp (OAuth2), storage/s3
+internal/                   # app-private packages: scheduler, cron, email, filter (CEL),
+                            # webhook, markdown (Goldmark), httpgetter, idp (OAuth2), storage/s3
 
 web/src/
 ├── connect.ts              # Connect RPC client + auth interceptor + token refresh
@@ -98,7 +98,7 @@ web/src/
 
 ## CI/CD
 
-- **backend-tests.yml:** Go 1.26.1, `go mod tidy -go=1.26.1`, golangci-lint v2.11.3, tests parallelized by group (store, server, plugin, other)
+- **backend-tests.yml:** Go 1.26.1, `go mod tidy -go=1.26.1`, golangci-lint v2.11.3, tests parallelized by group (store, server, internal, other)
 - **build-canary-image.yml:** Builds frontend with `pnpm release`, then publishes canary multi-arch container images for linux/amd64 and linux/arm64
 - **frontend-tests.yml:** Node 24, pnpm 10, lint + build
 - **proto-linter.yml:** buf lint + format check

cmd/memos/main.go

@@ -15,7 +15,7 @@ import (
 
 	"github.com/usememos/memos/internal/profile"
 	"github.com/usememos/memos/internal/version"
-	"github.com/usememos/memos/plugin/webhook"
+	"github.com/usememos/memos/internal/webhook"
 	"github.com/usememos/memos/server"
 	"github.com/usememos/memos/store"
 	"github.com/usememos/memos/store/db"

internal/email/README.md

@@ -23,7 +23,7 @@ This plugin provides a simple, reliable email sending interface following indust
 ### 1. Configure SMTP Settings
 
 ```go
-import "github.com/usememos/memos/plugin/email"
+import "github.com/usememos/memos/internal/email"
 
 config := &email.Config{
     SMTPHost:     "smtp.gmail.com",
@@ -191,13 +191,13 @@ email.Send(config, message)
 
 ```bash
 # All tests
-go test ./plugin/email/... -v
+go test ./internal/email/... -v
 
 # With coverage
-go test ./plugin/email/... -v -cover
+go test ./internal/email/... -v -cover
 
 # With race detector
-go test ./plugin/email/... -race
+go test ./internal/email/... -race
 ```
 
 ### Manual Testing
@@ -209,7 +209,7 @@ package main
 
 import (
     "log"
-    "github.com/usememos/memos/plugin/email"
+    "github.com/usememos/memos/internal/email"
 )
 
 func main() {
@@ -466,7 +466,7 @@ Sends email using the client's configuration.
 ## Architecture
 
 ```
-plugin/email/
+internal/email/
 ├── config.go       # SMTP configuration types
 ├── message.go      # Email message types and formatting
 ├── client.go       # SMTP client implementation
@@ -481,12 +481,12 @@ Part of the Memos project. See main repository for license details.
 
 ## Contributing
 
-This plugin follows the Memos contribution guidelines. Please ensure:
+This package follows the Memos contribution guidelines. Please ensure:
 
 1. All code is tested (TDD approach)
-2. Tests pass: `go test ./plugin/email/... -v`
-3. Code is formatted: `go fmt ./plugin/email/...`
-4. No linting errors: `golangci-lint run ./plugin/email/...`
+2. Tests pass: `go test ./internal/email/... -v`
+3. Code is formatted: `go fmt ./internal/email/...`
+4. No linting errors: `golangci-lint run ./internal/email/...`
 
 ## Support
 

internal/idp/oauth2/oauth2.go

@@ -1,4 +1,4 @@
-// Package oauth2 is the plugin for OAuth2 Identity Provider.
+// Package oauth2 implements the OAuth2 identity provider integration.
 package oauth2
 
 import (
@@ -12,7 +12,7 @@ import (
 	"github.com/pkg/errors"
 	"golang.org/x/oauth2"
 
-	"github.com/usememos/memos/plugin/idp"
+	"github.com/usememos/memos/internal/idp"
 	storepb "github.com/usememos/memos/proto/gen/store"
 )
 

internal/idp/oauth2/oauth2_test.go

@@ -13,7 +13,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"github.com/usememos/memos/plugin/idp"
+	"github.com/usememos/memos/internal/idp"
 	storepb "github.com/usememos/memos/proto/gen/store"
 )
 

internal/markdown/extensions/tag.go

@@ -5,7 +5,7 @@ import (
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/util"
 
-	mparser "github.com/usememos/memos/plugin/markdown/parser"
+	mparser "github.com/usememos/memos/internal/markdown/parser"
 )
 
 type tagExtension struct{}

internal/markdown/markdown.go

@@ -11,9 +11,9 @@ import (
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/text"
 
-	mast "github.com/usememos/memos/plugin/markdown/ast"
-	"github.com/usememos/memos/plugin/markdown/extensions"
-	"github.com/usememos/memos/plugin/markdown/renderer"
+	mast "github.com/usememos/memos/internal/markdown/ast"
+	"github.com/usememos/memos/internal/markdown/extensions"
+	"github.com/usememos/memos/internal/markdown/renderer"
 	storepb "github.com/usememos/memos/proto/gen/store"
 )
 

internal/markdown/parser/tag.go

@@ -8,7 +8,7 @@ import (
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/text"
 
-	mast "github.com/usememos/memos/plugin/markdown/ast"
+	mast "github.com/usememos/memos/internal/markdown/ast"
 )
 
 const (

internal/markdown/parser/tag_test.go

@@ -8,7 +8,7 @@ import (
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/text"
 
-	mast "github.com/usememos/memos/plugin/markdown/ast"
+	mast "github.com/usememos/memos/internal/markdown/ast"
 )
 
 func TestTagParser(t *testing.T) {

internal/markdown/renderer/markdown_renderer.go

@@ -8,7 +8,7 @@ import (
 	gast "github.com/yuin/goldmark/ast"
 	east "github.com/yuin/goldmark/extension/ast"
 
-	mast "github.com/usememos/memos/plugin/markdown/ast"
+	mast "github.com/usememos/memos/internal/markdown/ast"
 )
 
 // MarkdownRenderer renders goldmark AST back to markdown text.

internal/markdown/renderer/markdown_renderer_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/text"
 
-	"github.com/usememos/memos/plugin/markdown/extensions"
+	"github.com/usememos/memos/internal/markdown/extensions"
 )
 
 func TestMarkdownRenderer(t *testing.T) {

internal/scheduler/README.md

@@ -24,7 +24,7 @@ package main
 import (
     "context"
     "fmt"
-    "github.com/usememos/memos/plugin/scheduler"
+    "github.com/usememos/memos/internal/scheduler"
 )
 
 func main() {

internal/scheduler/example_test.go

@@ -7,7 +7,7 @@ import (
 	"os"
 	"time"
 
-	"github.com/usememos/memos/plugin/scheduler"
+	"github.com/usememos/memos/internal/scheduler"
 )
 
 // Example demonstrates basic scheduler usage.

internal/scheduler/integration_test.go

@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/usememos/memos/plugin/scheduler"
+	"github.com/usememos/memos/internal/scheduler"
 )
 
 // TestRealWorldScenario tests a realistic multi-job scenario.

server/router/api/v1/attachment_service.go

@@ -22,11 +22,11 @@ import (
 	"google.golang.org/protobuf/types/known/emptypb"
 	"google.golang.org/protobuf/types/known/timestamppb"
 
+	"github.com/usememos/memos/internal/filter"
 	"github.com/usememos/memos/internal/motionphoto"
 	"github.com/usememos/memos/internal/profile"
+	"github.com/usememos/memos/internal/storage/s3"
 	"github.com/usememos/memos/internal/util"
-	"github.com/usememos/memos/plugin/filter"
-	"github.com/usememos/memos/plugin/storage/s3"
 	v1pb "github.com/usememos/memos/proto/gen/api/v1"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"

server/router/api/v1/auth_service.go

@@ -16,9 +16,9 @@ import (
 	"google.golang.org/protobuf/types/known/emptypb"
 	"google.golang.org/protobuf/types/known/timestamppb"
 
+	"github.com/usememos/memos/internal/idp"
+	"github.com/usememos/memos/internal/idp/oauth2"
 	"github.com/usememos/memos/internal/util"
-	"github.com/usememos/memos/plugin/idp"
-	"github.com/usememos/memos/plugin/idp/oauth2"
 	v1pb "github.com/usememos/memos/proto/gen/api/v1"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/server/auth"

server/router/api/v1/memo_service.go

@@ -13,7 +13,7 @@ import (
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/emptypb"
 
-	"github.com/usememos/memos/plugin/webhook"
+	"github.com/usememos/memos/internal/webhook"
 	v1pb "github.com/usememos/memos/proto/gen/api/v1"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/server/runner/memopayload"

server/router/api/v1/shortcut_service.go

@@ -10,8 +10,8 @@ import (
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/emptypb"
 
+	"github.com/usememos/memos/internal/filter"
 	"github.com/usememos/memos/internal/util"
-	"github.com/usememos/memos/plugin/filter"
 	v1pb "github.com/usememos/memos/proto/gen/api/v1"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"

server/router/api/v1/test/test_helper.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"testing"
 
+	"github.com/usememos/memos/internal/markdown"
 	"github.com/usememos/memos/internal/profile"
-	"github.com/usememos/memos/plugin/markdown"
 	"github.com/usememos/memos/server/auth"
 	apiv1 "github.com/usememos/memos/server/router/api/v1"
 	"github.com/usememos/memos/store"

server/router/api/v1/user_service.go

@@ -22,7 +22,7 @@ import (
 
 	"github.com/usememos/memos/internal/base"
 	"github.com/usememos/memos/internal/util"
-	"github.com/usememos/memos/plugin/webhook"
+	"github.com/usememos/memos/internal/webhook"
 	v1pb "github.com/usememos/memos/proto/gen/api/v1"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/server/auth"

server/router/api/v1/v1.go

@@ -10,8 +10,8 @@ import (
 	"github.com/labstack/echo/v5/middleware"
 	"golang.org/x/sync/semaphore"
 
+	"github.com/usememos/memos/internal/markdown"
 	"github.com/usememos/memos/internal/profile"
-	"github.com/usememos/memos/plugin/markdown"
 	v1pb "github.com/usememos/memos/proto/gen/api/v1"
 	"github.com/usememos/memos/server/auth"
 	"github.com/usememos/memos/store"

server/router/fileserver/README.md

@@ -193,7 +193,7 @@ Parses data URI to extract MIME type and base64 data.
 - `server/auth` - Authentication utilities
 - `store` - Database operations
 - `internal/profile` - Server configuration
-- `plugin/storage/s3` - S3 storage client
+- `internal/storage/s3` - S3 storage client
 
 ## Configuration
 

server/router/fileserver/fileserver.go

@@ -21,7 +21,7 @@ import (
 
 	"github.com/usememos/memos/internal/motionphoto"
 	"github.com/usememos/memos/internal/profile"
-	"github.com/usememos/memos/plugin/storage/s3"
+	"github.com/usememos/memos/internal/storage/s3"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/server/auth"
 	"github.com/usememos/memos/store"

server/router/fileserver/fileserver_test.go

@@ -11,9 +11,9 @@ import (
 	"github.com/labstack/echo/v5"
 	"github.com/stretchr/testify/require"
 
+	"github.com/usememos/memos/internal/markdown"
 	"github.com/usememos/memos/internal/profile"
 	"github.com/usememos/memos/internal/testutil"
-	"github.com/usememos/memos/plugin/markdown"
 	apiv1 "github.com/usememos/memos/proto/gen/api/v1"
 	"github.com/usememos/memos/server/auth"
 	apiv1service "github.com/usememos/memos/server/router/api/v1"

server/router/rss/rss.go

@@ -14,8 +14,8 @@ import (
 	"github.com/gorilla/feeds"
 	"github.com/labstack/echo/v5"
 
+	"github.com/usememos/memos/internal/markdown"
 	"github.com/usememos/memos/internal/profile"
-	"github.com/usememos/memos/plugin/markdown"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

server/runner/memopayload/runner.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/pkg/errors"
 
-	"github.com/usememos/memos/plugin/markdown"
+	"github.com/usememos/memos/internal/markdown"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

server/runner/s3presign/runner.go

@@ -7,7 +7,7 @@ import (
 
 	"google.golang.org/protobuf/types/known/timestamppb"
 
-	"github.com/usememos/memos/plugin/storage/s3"
+	"github.com/usememos/memos/internal/storage/s3"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/attachment.go

@@ -9,7 +9,7 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/usememos/memos/internal/base"
-	"github.com/usememos/memos/plugin/storage/s3"
+	"github.com/usememos/memos/internal/storage/s3"
 	storepb "github.com/usememos/memos/proto/gen/store"
 )
 

store/db/mysql/attachment.go

@@ -9,7 +9,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/db/mysql/memo.go

@@ -8,7 +8,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/db/mysql/memo_relation.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	"github.com/usememos/memos/store"
 )
 

store/db/postgres/attachment.go

@@ -9,7 +9,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/db/postgres/memo.go

@@ -8,7 +8,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/db/postgres/memo_relation.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	"github.com/usememos/memos/store"
 )
 

store/db/sqlite/attachment.go

@@ -9,7 +9,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/db/sqlite/memo.go

@@ -8,7 +8,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )

store/db/sqlite/memo_relation.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/usememos/memos/plugin/filter"
+	"github.com/usememos/memos/internal/filter"
 	"github.com/usememos/memos/store"
 )