diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000000..aa8423c6812
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,35 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+
+bin
+*.iml
+.idea
+.DS_Store
+
+cscope.*
+**/*.swp
+
+# Files generated when testing
+vendor/
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000000..c2cce942d65
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,99 @@
+### Makefile for tidb-cdc
+.PHONY: build test check clean fmt cdc
+
+PROJECT=tidb-cdc
+
+# Ensure GOPATH is set before running build process.
+ifeq "$(GOPATH)" ""
+  $(error Please set the environment variable GOPATH before running `make`)
+endif
+FAIL_ON_STDOUT := awk '{ print  } END { if (NR > 0) { exit 1  }  }'
+
+CURDIR := $(shell pwd)
+path_to_add := $(addsuffix /bin,$(subst :,/bin:,$(GOPATH)))
+export PATH := $(path_to_add):$(PATH)
+
+TEST_DIR := /tmp/tidb_cdc_test
+
+GO       := GO111MODULE=on go
+GOBUILD  := CGO_ENABLED=0 $(GO) build $(BUILD_FLAG)
+GOTEST   := CGO_ENABLED=1 $(GO) test -p 3
+
+ARCH  := "`uname -s`"
+LINUX := "Linux"
+MAC   := "Darwin"
+PACKAGE_LIST := go list ./...| grep -vE 'vendor|proto'
+PACKAGES  := $$($(PACKAGE_LIST))
+PACKAGE_DIRECTORIES := $(PACKAGE_LIST) | sed 's|github.com/pingcap/$(PROJECT)/||'
+FILES := $$(find . -name '*.go' -type f | grep -vE 'vendor')
+
+# LDFLAGS += -X "github.com/pingcap/tidb-cdc/pkg/version.BuildTS=$(shell date -u '+%Y-%m-%d %I:%M:%S')"
+# LDFLAGS += -X "github.com/pingcap/tidb-cdc/pkg/version.GitHash=$(shell git rev-parse HEAD)"
+# LDFLAGS += -X "github.com/pingcap/tidb-cdc/pkg/version.ReleaseVersion=$(shell git describe --tags --dirty)"
+
+default: build buildsucc
+
+buildsucc:
+	@echo Build TiDB CDC successfully!
+
+all: dev install
+
+dev: check test
+
+build: cdc
+
+cdc:
+	$(GOBUILD) -ldflags '$(LDFLAGS)' -o bin/cdc cmd/cdc/main.go
+
+install:
+	go install ./...
+
+test:
+	mkdir -p "$(TEST_DIR)"
+	@export log_level=error;\
+	$(GOTEST) -cover -covermode=count -coverprofile="$(TEST_DIR)/cov.unit.out" $(PACKAGES)
+
+fmt:
+	@echo "gofmt (simplify)"
+	@gofmt -s -l -w $(FILES) 2>&1 | $(FAIL_ON_STDOUT)
+
+lint:tools/bin/revive
+	@echo "linting"
+	@tools/bin/revive -formatter friendly -config tools/check/revive.toml $(FILES)
+
+vet:
+	@echo "vet"
+	$(GO) vet $(PACKAGES) 2>&1 | $(FAIL_ON_STDOUT)
+
+tidy:
+	@echo "go mod tidy"
+	./tools/check/check-tidy.sh
+
+check: fmt lint check-static tidy
+
+coverage:
+	GO111MODULE=off go get github.com/wadey/gocovmerge
+	gocovmerge "$(TEST_DIR)"/cov.* | grep -vE ".*.pb.go" > "$(TEST_DIR)/all_cov.out"
+ifeq ("$(JenkinsCI)", "1")
+	GO111MODULE=off go get github.com/mattn/goveralls
+	@goveralls -coverprofile=$(TEST_DIR)/all_cov.out -service=jenkins-ci -repotoken $(COVERALLS_TOKEN)
+else
+	go tool cover -html "$(TEST_DIR)/all_cov.out" -o "$(TEST_DIR)/all_cov.html"
+	grep -F '<option' "$(TEST_DIR)/all_cov.html"
+endif
+
+check-static: tools/bin/golangci-lint
+	$(GO) mod vendor
+	tools/bin/golangci-lint --disable errcheck run $$($(PACKAGE_DIRECTORIES))
+
+clean:
+	go clean -i ./...
+	rm -rf *.out
+
+tools/bin/revive: tools/check/go.mod
+	cd tools/check; \
+	$(GO) build -o ../bin/revive github.com/mgechev/revive
+
+tools/bin/golangci-lint: tools/check/go.mod
+	cd tools/check; \
+	$(GO) build -o ../bin/golangci-lint github.com/golangci/golangci-lint/cmd/golangci-lint
diff --git a/cdc/buffer.go b/cdc/buffer.go
new file mode 100644
index 00000000000..f5b780b9a07
--- /dev/null
+++ b/cdc/buffer.go
@@ -0,0 +1,47 @@
+package cdc
+
+import "context"
+
+// buffer entry from kv layer
+type bufferEntry struct {
+	kv       *KVEntry
+	resolved *ResolvedSpan
+}
+
+type buffer struct {
+	entriesCh chan bufferEntry
+}
+
+func makeBuffer() *buffer {
+	return &buffer{
+		entriesCh: make(chan bufferEntry),
+	}
+}
+
+func (b *buffer) AddEntry(ctx context.Context, entry bufferEntry) error {
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case b.entriesCh <- entry:
+		return nil
+	}
+}
+
+func (b *buffer) AddKVEntry(ctx context.Context, kv *KVEntry) error {
+	return b.AddEntry(ctx, bufferEntry{kv: kv})
+}
+
+func (b *buffer) AddResolved(ctx context.Context, span Span, ts uint64) error {
+	return b.AddEntry(ctx, bufferEntry{resolved: &ResolvedSpan{Span: span, Timestamp: ts}})
+}
+
+func (b *buffer) Get(ctx context.Context) (bufferEntry, error) {
+	select {
+	case <-ctx.Done():
+		return bufferEntry{}, ctx.Err()
+	case e := <-b.entriesCh:
+		return e, nil
+	}
+}
+
+// TODO limit memory buffer
diff --git a/cdc/capture.go b/cdc/capture.go
new file mode 100644
index 00000000000..32b57ac7a30
--- /dev/null
+++ b/cdc/capture.go
@@ -0,0 +1,132 @@
+package cdc
+
+import "context"
+
+type OpType int
+
+const (
+	OpTypeUnknow OpType = 0
+	OpTypePut    OpType = 1
+	OpTypeDelete OpType = 2
+)
+
+// Capture watch some span of KV and emit the entries to sink according to the ChangeFeedDetail
+type Capture struct {
+	watchs       []Span
+	checkpointTS uint64
+	encoder      Encoder
+	detail       ChangeFeedDetail
+
+	// errCh contains the return values of the puller
+	errCh  chan error
+	cancel context.CancelFunc
+
+	// sink is the Sink to write rows to.
+	// Resolved timestamps are never written by Capture
+	sink Sink
+}
+
+type KVEntry struct {
+	OpType OpType
+	Key    []byte
+	Value  []byte
+	TS     uint64
+}
+
+type ResolvedSpan struct {
+	Span      Span
+	Timestamp uint64
+}
+
+func NewCapture(
+	watchs []Span,
+	checkpointTS uint64,
+	detail ChangeFeedDetail,
+) (c *Capture, err error) {
+	encoder, err := getEncoder(detail.Opts)
+	if err != nil {
+		return nil, err
+	}
+
+	sink, err := getSink(detail.SinkURI, detail.Opts)
+	if err != nil {
+		return nil, err
+	}
+
+	c = &Capture{
+		watchs:       watchs,
+		checkpointTS: checkpointTS,
+		encoder:      encoder,
+		sink:         sink,
+		detail:       detail,
+	}
+
+	return
+}
+
+func (c *Capture) Start(ctx context.Context) (err error) {
+	ctx, c.cancel = context.WithCancel(ctx)
+	defer c.cancel()
+
+	buf := makeBuffer()
+
+	puller := newPuller(c.checkpointTS, c.watchs, c.detail, buf)
+	c.errCh = make(chan error, 2)
+	go func() {
+		err := puller.Run(ctx)
+		c.errCh <- err
+	}()
+
+	rowsFn := kvsToRows(c.detail, buf.Get)
+	emitFn := emitEntries(c.detail, c.watchs, c.encoder, c.sink, rowsFn)
+
+	for {
+		resolved, err := emitFn(ctx)
+		if err != nil {
+			select {
+			case err = <-c.errCh:
+			default:
+			}
+			return err
+		}
+
+		// TODO: forward resolved span to Frontier
+		_ = resolved
+	}
+}
+
+// Frontier handle all ResolvedSpan and emit resolved timestamp
+type Frontier struct {
+	// once all the span receive a resolved ts, it's safe to emit a changefeed level resolved ts
+	spans   []Span
+	detail  ChangeFeedDetail
+	encoder Encoder
+	sink    Sink
+}
+
+func NewFrontier(spans []Span, detail ChangeFeedDetail) (f *Frontier, err error) {
+	encoder, err := getEncoder(detail.Opts)
+	if err != nil {
+		return nil, err
+	}
+
+	sink, err := getSink(detail.SinkURI, detail.Opts)
+	if err != nil {
+		return nil, err
+	}
+
+	f = &Frontier{
+		spans:   spans,
+		detail:  detail,
+		encoder: encoder,
+		sink:    sink,
+	}
+
+	return
+}
+
+func (f *Frontier) NotifyResolvedSpan(resolve ResolvedSpan) error {
+	// TODO emit resolved timestamp once it's safe
+
+	return nil
+}
diff --git a/cdc/cdctest/mock_tidb.go b/cdc/cdctest/mock_tidb.go
new file mode 100644
index 00000000000..13170017f7d
--- /dev/null
+++ b/cdc/cdctest/mock_tidb.go
@@ -0,0 +1,139 @@
+package cdc
+
+import (
+	"github.com/pingcap/check"
+	"github.com/pingcap/kvproto/pkg/kvrpcpb"
+	"github.com/pingcap/log"
+	"github.com/pingcap/parser"
+	"github.com/pingcap/tidb-cdc/cdc"
+	"github.com/pingcap/tidb/domain"
+	"github.com/pingcap/tidb/kv"
+	"github.com/pingcap/tidb/session"
+	"github.com/pingcap/tidb/store/mockstore"
+	"github.com/pingcap/tidb/store/mockstore/mocktikv"
+	"github.com/pingcap/tidb/util/mock"
+	"github.com/pingcap/tidb/util/testkit"
+	"go.uber.org/zap"
+)
+
+type MockTiDB struct {
+	cluster   *mocktikv.Cluster
+	mvccStore mocktikv.MVCCStore
+	store     kv.Storage
+	domain    *domain.Domain
+	*parser.Parser
+	ctx *mock.Context
+	c   *check.C
+
+	kvs map[string]string
+}
+
+func NewMockPuller(c *check.C) (*MockTiDB, error) {
+	p := &MockTiDB{
+		c:   c,
+		kvs: make(map[string]string),
+	}
+
+	if err := p.setUp(); err != nil {
+		return nil, err
+	}
+
+	return p, nil
+}
+
+func (p *MockTiDB) setUp() (err error) {
+	p.Parser = parser.New()
+	p.cluster = mocktikv.NewCluster()
+	mocktikv.BootstrapWithSingleStore(p.cluster)
+	p.mvccStore = mocktikv.MustNewMVCCStore()
+	store, err := mockstore.NewMockTikvStore(
+		mockstore.WithCluster(p.cluster),
+		mockstore.WithMVCCStore(p.mvccStore),
+	)
+	if err != nil {
+		return
+	}
+
+	p.store = store
+	session.SetSchemaLease(0)
+	session.DisableStats4Test()
+	p.domain, err = session.BootstrapSession(p.store)
+	if err != nil {
+		return
+	}
+
+	p.domain.SetStatsUpdating(true)
+	return nil
+}
+
+func (p *MockTiDB) tearDown() {
+	p.domain.Close()
+	p.store.Close()
+}
+
+// We scan all the KV space to get the changed KV events every time after
+// execute a SQL and use the current version as the ts of the KV events
+// because there's no way to get the true commit ts of the kv
+func (p *MockTiDB) updateEvent() (entrys []cdc.KVEntry, err error) {
+	ver, err := p.store.CurrentVersion()
+	if err != nil {
+		return nil, err
+	}
+
+	ts := ver.Ver
+
+	pairs := p.mvccStore.Scan(nil, nil, 1<<30, ts, kvrpcpb.IsolationLevel_RC)
+
+	newKVS := make(map[string]string)
+	for _, pair := range pairs {
+		if pair.Err != nil {
+			log.Error("pair err", zap.Error(pair.Err))
+			continue
+		}
+		newKVS[string(pair.Key)] = string(pair.Value)
+	}
+
+	// Put kv
+	for k, v := range newKVS {
+		oldv, _ := p.kvs[k]
+		if oldv != v {
+			entry := cdc.KVEntry{
+				OpType: cdc.OpTypePut,
+				Key:    []byte(k),
+				Value:  []byte(v),
+				TS:     ts,
+			}
+
+			entrys = append(entrys, entry)
+		}
+	}
+
+	// Delete
+	for k, v := range p.kvs {
+		_, ok := newKVS[k]
+		if !ok {
+			entry := cdc.KVEntry{
+				OpType: cdc.OpTypePut,
+				Key:    []byte(k),
+				Value:  []byte(v),
+				TS:     ts,
+			}
+			entrys = append(entrys, entry)
+		}
+	}
+
+	p.kvs = newKVS
+
+	return
+}
+
+// MustExec execute the sql and return all the KVEntry events
+func (p *MockTiDB) MustExec(sql string, args ...interface{}) []cdc.KVEntry {
+	tk := testkit.NewTestKit(p.c, p.store)
+	tk.MustExec(sql, args...)
+
+	entrys, err := p.updateEvent()
+	p.c.Assert(err, check.IsNil)
+
+	return entrys
+}
diff --git a/cdc/cdctest/mock_tidb_test.go b/cdc/cdctest/mock_tidb_test.go
new file mode 100644
index 00000000000..6850592ab48
--- /dev/null
+++ b/cdc/cdctest/mock_tidb_test.go
@@ -0,0 +1,33 @@
+package cdc
+
+import (
+	"testing"
+
+	"github.com/pingcap/check"
+	"github.com/pingcap/tidb-cdc/cdc"
+)
+
+func Test(t *testing.T) { check.TestingT(t) }
+
+type mockTiDBsuite struct {
+}
+
+var _ = check.Suite(&mockTiDBsuite{})
+
+func (s *mockTiDBsuite) TestCanGetKVEntrys(c *check.C) {
+	puller, err := NewMockPuller(c)
+	c.Assert(err, check.IsNil)
+
+	var entrys []cdc.KVEntry
+	entrys = puller.MustExec("create table test.test(id int primary key, a int)")
+	c.Assert(len(entrys), check.Greater, 0)
+	c.Log(len(entrys))
+
+	entrys = puller.MustExec("insert into test.test(id, a) values(?, ?)", 1, 1)
+	c.Assert(len(entrys), check.Greater, 0)
+	c.Log(entrys)
+
+	entrys = puller.MustExec("delete from test.test")
+	c.Assert(len(entrys), check.Greater, 0)
+	c.Log(entrys)
+}
diff --git a/cdc/changefeed.go b/cdc/changefeed.go
new file mode 100644
index 00000000000..469d40c2cde
--- /dev/null
+++ b/cdc/changefeed.go
@@ -0,0 +1,111 @@
+package cdc
+
+import (
+	"context"
+	"time"
+
+	"github.com/pingcap/errors"
+	"github.com/pingcap/log"
+	"github.com/pingcap/tidb/store/tikv/oracle"
+	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
+)
+
+type formatType string
+
+const (
+	optFormat = "format"
+
+	optFormatJSON formatType = "json"
+)
+
+type emitEntry struct {
+	row *encodeRow
+
+	resolved *ResolvedSpan
+}
+
+type ChangeFeedDetail struct {
+	SinkURI      string
+	Opts         map[string]string
+	CheckpointTS uint64
+	CreateTime   time.Time
+}
+
+type ChangeFeed struct {
+	detail   ChangeFeedDetail
+	frontier *Frontier
+}
+
+func NewChangeFeed(detail ChangeFeedDetail) *ChangeFeed {
+	return &ChangeFeed{
+		detail: detail,
+	}
+}
+
+func (c *ChangeFeed) Start(ctx context.Context) error {
+	checkpointTS := c.detail.CheckpointTS
+	if checkpointTS == 0 {
+		checkpointTS = oracle.EncodeTSO(c.detail.CreateTime.Unix() * 1000)
+	}
+
+	var err error
+	c.frontier, err = NewFrontier([]Span{{nil, nil}}, c.detail)
+	if err != nil {
+		return errors.Annotate(err, "NewFrontier failed")
+	}
+
+	// TODO: just one capture watch all kv for test now
+	capure, err := NewCapture([]Span{{nil, nil}}, checkpointTS, c.detail)
+	if err != nil {
+		return errors.Annotate(err, "NewCapture failed")
+	}
+
+	errg, ctx := errgroup.WithContext(context.Background())
+
+	errg.Go(func() error {
+		return capure.Start(ctx)
+	})
+
+	// errg.Go(func() error {
+	// 	return frontier.Start(ctx)
+	// })
+
+	return errg.Wait()
+}
+
+// kvsToRows gets changed kvs from a closure and converts them into sql rows.
+// The returned closure is not threadsafe.
+func kvsToRows(
+	detail ChangeFeedDetail,
+	inputFn func(context.Context) (bufferEntry, error),
+) func(context.Context) (*emitEntry, error) {
+	panic("todo")
+}
+
+// emitEntries connects to a sink, receives rows from a closure, and repeatedly
+// emits them to the sink. It returns a closure that may be repeatedly called to
+// advance the changefeed and which returns span-level resolved timestamp
+// updates. The returned closure is not threadsafe.
+func emitEntries(
+	detail ChangeFeedDetail,
+	watchedSpans []Span,
+	encoder Encoder,
+	sink Sink,
+	inputFn func(context.Context) (*emitEntry, error),
+) func(context.Context) ([]ResolvedSpan, error) {
+	panic("todo")
+}
+
+// emitResolvedTimestamp emits a changefeed-level resolved timestamp
+func emitResolvedTimestamp(
+	ctx context.Context, encoder Encoder, sink Sink, resolved uint64,
+) error {
+	if err := sink.EmitResolvedTimestamp(ctx, encoder, resolved); err != nil {
+		return err
+	}
+
+	log.Info("resolved", zap.Uint64("timestamp", resolved))
+
+	return nil
+}
diff --git a/cdc/doc.go b/cdc/doc.go
new file mode 100644
index 00000000000..30f8aaec379
--- /dev/null
+++ b/cdc/doc.go
@@ -0,0 +1 @@
+package cdc
diff --git a/cdc/encoder.go b/cdc/encoder.go
new file mode 100644
index 00000000000..a2dc6fae3e7
--- /dev/null
+++ b/cdc/encoder.go
@@ -0,0 +1,72 @@
+package cdc
+
+import (
+	"fmt"
+
+	"github.com/pingcap/errors"
+	"github.com/pingcap/parser/model"
+	"github.com/pingcap/tidb/types"
+)
+
+// encodeRow holds all the pieces necessary to encode a row change into a key or
+// value.
+type encodeRow struct {
+	// datums is the new value of a changed table row.
+	datums []types.Datum
+
+	commitTS uint64
+
+	// deleted is true if row is a deletion. In this case, only the primary
+	// key columns are guaranteed to be set in `datums`.
+	deleted bool
+
+	tableInfo *model.TableInfo
+}
+
+type Encoder interface {
+	// EncodeKey encodes the primary key of the given row.
+	EncodeKey(encodeRow) ([]byte, error)
+
+	// EncodeValue encodes the primary key of the given row.
+	EncodeValue(encodeRow) ([]byte, error)
+
+	// EncodeResolvedTimestamp encodes a resolved timestamp payload
+	EncodeResolvedTimestamp(uint64) ([]byte, error)
+}
+
+func getEncoder(opts map[string]string) (Encoder, error) {
+	switch formatType(opts[optFormat]) {
+	case "", optFormatJSON:
+		return newJSONEncoder(opts)
+	default:
+		return nil, errors.Errorf("unknow format: %s", opts[optFormat])
+	}
+}
+
+type jsonEncoder struct {
+}
+
+var _ Encoder = &jsonEncoder{}
+
+func newJSONEncoder(opts map[string]string) (*jsonEncoder, error) {
+	// TODO
+	return &jsonEncoder{}, nil
+}
+
+func (e *jsonEncoder) EncodeKey(row encodeRow) ([]byte, error) {
+	// TODO
+	str := fmt.Sprintf("%+v", row)
+	return []byte(str), nil
+}
+
+func (e *jsonEncoder) EncodeValue(row encodeRow) ([]byte, error) {
+	// TODO
+	str := fmt.Sprintf("%+v", row)
+	return []byte(str), nil
+}
+
+func (e *jsonEncoder) EncodeResolvedTimestamp(ts uint64) ([]byte, error) {
+	// TODO
+	str := fmt.Sprintf("ts: %v", ts)
+	return []byte(str), nil
+}
diff --git a/cdc/puller.go b/cdc/puller.go
new file mode 100644
index 00000000000..75204e83c2b
--- /dev/null
+++ b/cdc/puller.go
@@ -0,0 +1,34 @@
+package cdc
+
+import "context"
+
+// puller pull data from tikv and push changes into a buffer
+type puller struct {
+	checkpointTS uint64
+	spans        []Span
+	detail       ChangeFeedDetail
+	buf          *buffer
+}
+
+func newPuller(
+	checkpointTS uint64,
+	spans []Span,
+	detail ChangeFeedDetail,
+	buf *buffer,
+) *puller {
+	p := &puller{
+		checkpointTS: checkpointTS,
+		spans:        spans,
+		detail:       detail,
+		buf:          buf,
+	}
+
+	return p
+}
+
+func (p *puller) Run(ctx context.Context) error {
+	// TODO pull from tikv and push into buf
+	// need buffer in memory first
+	<-ctx.Done()
+	return nil
+}
diff --git a/cdc/rowfetcher.go b/cdc/rowfetcher.go
new file mode 100644
index 00000000000..e6bbb9f7e39
--- /dev/null
+++ b/cdc/rowfetcher.go
@@ -0,0 +1,24 @@
+package cdc
+
+import (
+	"context"
+
+	"github.com/pingcap/parser/model"
+	"github.com/pingcap/tidb/types"
+)
+
+// rowFetcher convert kv to row
+type rowFetcher struct {
+}
+
+func newRowFetcher() *rowFetcher {
+	panic("TODO")
+}
+
+func (c *rowFetcher) TableInfoForKey(ctx context.Context, key []byte, ts uint64) (table *model.TableInfo, err error) {
+	panic("TODO")
+}
+
+func (c *rowFetcher) GetRowByKey(ctx context.Context, key []byte, ts uint64) (datums []types.Datum, table *model.TableInfo, err error) {
+	panic("TODO")
+}
diff --git a/cdc/sink.go b/cdc/sink.go
new file mode 100644
index 00000000000..576b742b63c
--- /dev/null
+++ b/cdc/sink.go
@@ -0,0 +1,62 @@
+package cdc
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/pingcap/parser/model"
+)
+
+// Sink is an abstraction for anything that a changefeed may emit into.
+type Sink interface {
+	EmitRow(
+		ctx context.Context,
+		table *model.TableInfo,
+		key, value []byte,
+		ts uint64,
+	) error
+	EmitResolvedTimestamp(
+		ctx context.Context,
+		encoder Encoder,
+		resolved uint64,
+	) error
+	// Flush blocks until every message enqueued by EmitRow and
+	// EmitResolvedTimestamp has been acknowledged by the sink.
+	Flush(ctx context.Context) error
+	// Close does not guarantee delivery of outstanding messages.
+	Close() error
+}
+
+func getSink(
+	sinkURI string,
+	opts map[string]string,
+) (Sink, error) {
+	// TODO
+	return &writerSink{Writer: os.Stdout}, nil
+}
+
+type writerSink struct {
+	io.Writer
+}
+
+var _ Sink = &writerSink{}
+
+func (s *writerSink) EmitRow(ctx context.Context, table *model.TableInfo, key, value []byte, updated uint64) error {
+	fmt.Fprintf(s, "key: %s, value: %s, updated: %d", string(key), string(value), updated)
+	return nil
+}
+
+func (s *writerSink) EmitResolvedTimestamp(ctx context.Context, encoder Encoder, resolved uint64) error {
+	fmt.Fprintf(s, "resolved: %d", resolved)
+	return nil
+}
+
+func (s *writerSink) Flush(ctx context.Context) error {
+	return nil
+}
+
+func (s *writerSink) Close() error {
+	return nil
+}
diff --git a/cdc/util.go b/cdc/util.go
new file mode 100644
index 00000000000..59c320791c4
--- /dev/null
+++ b/cdc/util.go
@@ -0,0 +1,6 @@
+package cdc
+
+type Span struct {
+	Start []byte
+	End   []byte
+}
diff --git a/cmd/cdc/main.go b/cmd/cdc/main.go
new file mode 100644
index 00000000000..26d641d7c44
--- /dev/null
+++ b/cmd/cdc/main.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"context"
+	"time"
+
+	"github.com/pingcap/tidb-cdc/cdc"
+)
+
+func main() {
+	detail := cdc.ChangeFeedDetail{
+		SinkURI:      "",
+		Opts:         make(map[string]string),
+		CheckpointTS: 0,
+		CreateTime:   time.Now(),
+	}
+
+	feed := cdc.NewChangeFeed(detail)
+
+	feed.Start(context.Background())
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 00000000000..1de9fd01714
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,16 @@
+module github.com/pingcap/tidb-cdc
+
+go 1.12
+
+require (
+	github.com/pingcap/check v0.0.0-20190102082844-67f458068fc8
+	github.com/pingcap/errors v0.11.4
+	github.com/pingcap/kvproto v0.0.0-20190809124429-2c7868ade918
+	github.com/pingcap/log v0.0.0-20190307075452-bd41d9273596
+	github.com/pingcap/parser v0.0.0-20190812082400-1619718d231d
+	github.com/pingcap/tidb v0.0.0-20190813092053-6d51ad33fd86
+	github.com/remyoudompheng/bigfft v0.0.0-20190728182440-6a916e37a237 // indirect
+	github.com/sirupsen/logrus v1.4.2 // indirect
+	go.uber.org/zap v1.9.1
+	golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 00000000000..8206f77f9ae
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,316 @@
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diff --git a/tools/check/check-tidy.sh b/tools/check/check-tidy.sh
new file mode 100755
index 00000000000..b0f35462356
--- /dev/null
+++ b/tools/check/check-tidy.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+GO111MODULE=on go mod tidy
+git diff --quiet
diff --git a/tools/check/go.mod b/tools/check/go.mod
new file mode 100644
index 00000000000..eb7b1f08796
--- /dev/null
+++ b/tools/check/go.mod
@@ -0,0 +1,19 @@
+module github.com/pingcap/tidb-binlog/_tools
+
+require (
+	github.com/go-critic/go-critic v0.0.0-20181204210945-ee9bf5809ead // indirect
+	github.com/golangci/golangci-lint v1.16.1-0.20190425135923-692dacb773b7
+	github.com/mattn/go-colorable v0.1.1 // indirect
+	github.com/mattn/go-isatty v0.0.7 // indirect
+	github.com/mattn/go-runewidth v0.0.4 // indirect
+	github.com/mgechev/dots v0.0.0-20181228164730-18fa4c4b71cc // indirect
+	github.com/mgechev/revive v0.0.0-20190422175802-e8c1baf8ac0e
+	github.com/olekukonko/tablewriter v0.0.1 // indirect
+	github.com/pkg/errors v0.8.1 // indirect
+	golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734 // indirect
+	golang.org/x/net v0.0.0-20190424112056-4829fb13d2c6 // indirect
+	golang.org/x/sys v0.0.0-20190426135247-a129542de9ae // indirect
+	golang.org/x/text v0.3.2 // indirect
+	golang.org/x/tools v0.0.0-20190425222832-ad9eeb80039a // indirect
+	sourcegraph.com/sourcegraph/go-diff v0.5.1-0.20190210232911-dee78e514455 // indirect
+)
diff --git a/tools/check/go.sum b/tools/check/go.sum
new file mode 100644
index 00000000000..2d362cb7a11
--- /dev/null
+++ b/tools/check/go.sum
@@ -0,0 +1,212 @@
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+github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fatih/color v1.6.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/structtag v1.0.0 h1:pTHj65+u3RKWYPSGaU290FpI/dXxTaHdVwVwbcPKmEc=
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+github.com/go-lintpack/lintpack v0.5.2 h1:DI5mA3+eKdWeJ40nU4d6Wc26qmdG8RCi/btYq0TuRN0=
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diff --git a/tools/check/revive.toml b/tools/check/revive.toml
new file mode 100644
index 00000000000..19193c23cd1
--- /dev/null
+++ b/tools/check/revive.toml
@@ -0,0 +1,51 @@
+ignoreGeneratedHeader = false
+severity = "error"
+confidence = 0.8
+errorCode = -1
+warningCode = -1
+
+[rule.blank-imports]
+[rule.context-as-argument]
+[rule.dot-imports]
+[rule.error-return]
+[rule.error-strings]
+[rule.error-naming]
+[rule.exported]
+[rule.if-return]
+[rule.var-naming]
+[rule.package-comments]
+[rule.range]
+[rule.receiver-naming]
+[rule.indent-error-flow]
+[rule.superfluous-else]
+[rule.modifies-parameter]
+
+# This can be checked by other tools like megacheck
+[rule.unreachable-code]
+
+
+# Currently this makes too much noise, but should add it in
+# and perhaps ignore it in a few files
+#[rule.confusing-naming]
+#  severity = "warning"
+#[rule.confusing-results]
+#  severity = "warning"
+#[rule.unused-parameter]
+#  severity = "warning"
+#[rule.deep-exit]
+#  severity = "warning"
+#[rule.flag-parameter]
+#  severity = "warning"
+
+
+
+# Adding these will slow down the linter
+# They are already provided by megacheck
+# [rule.unexported-return]
+# [rule.time-naming]
+# [rule.errorf]
+
+# Adding these will slow down the linter
+# Not sure if they are already provided by megacheck
+# [rule.var-declaration]
+# [rule.context-keys-type]