diff --git a/backend/go.mod b/backend/go.mod
index a3f5887..e73c1ce 100644
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -3,11 +3,14 @@ module gitea.d3m0k1d.ru/d3m0k1d/HellreigN/backend
 go 1.26.1
 
 require (
+	gitea.d3m0k1d.ru/d3m0k1d/HellreigN/proto v0.0.0-20260403210401-a6212c89fc0e
 	github.com/ClickHouse/clickhouse-go/v2 v2.44.0
 	github.com/gin-gonic/gin v1.12.0
 	github.com/swaggo/files v1.0.1
 	github.com/swaggo/gin-swagger v1.6.1
 	github.com/swaggo/swag v1.16.6
+	golang.org/x/sync v0.20.0
+	google.golang.org/grpc v1.80.0
 	gopkg.in/yaml.v3 v3.0.1
 	modernc.org/sqlite v1.48.1
 )
@@ -68,10 +71,10 @@ require (
 	golang.org/x/crypto v0.49.0 // indirect
 	golang.org/x/mod v0.34.0 // indirect
 	golang.org/x/net v0.52.0 // indirect
-	golang.org/x/sync v0.20.0 // indirect
 	golang.org/x/sys v0.42.0 // indirect
 	golang.org/x/text v0.35.0 // indirect
 	golang.org/x/tools v0.43.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260120221211-b8f7ae30c516 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	modernc.org/libc v1.70.0 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
diff --git a/backend/go.sum b/backend/go.sum
index 1372e6b..e78bda7 100644
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -1,3 +1,5 @@
+gitea.d3m0k1d.ru/d3m0k1d/HellreigN/proto v0.0.0-20260403210401-a6212c89fc0e h1:Z/2Mjc9NU0CWIduj8Wd9ClnZt4dqmQUUXl1VlyGQe6U=
+gitea.d3m0k1d.ru/d3m0k1d/HellreigN/proto v0.0.0-20260403210401-a6212c89fc0e/go.mod h1:1DByetpOnW2+AjM8ZWbJ1Xfzprus8fBie2AMUP/YHHA=
 github.com/ClickHouse/ch-go v0.71.0 h1:bUdZ/EZj/LcVHsMqaRUP2holqygrPWQKeMjc6nZoyRM=
 github.com/ClickHouse/ch-go v0.71.0/go.mod h1:NwbNc+7jaqfY58dmdDUbG4Jl22vThgx1cYjBw0vtgXw=
 github.com/ClickHouse/clickhouse-go/v2 v2.44.0 h1:9pxs5pRwIvhni5BDRPn/n5A8DeUod5TnBaeulFBX8EQ=
@@ -33,6 +35,10 @@ github.com/go-faster/city v1.0.1 h1:4WAxSZ3V2Ws4QRDrscLEDcibJY8uf41H6AhXDrNDcGw=
 github.com/go-faster/city v1.0.1/go.mod h1:jKcUJId49qdW3L1qKHH/3wPeUstCVpVSXTM6vO3VcTw=
 github.com/go-faster/errors v0.7.1 h1:MkJTnDoEdi9pDabt1dpWf7AA8/BaSYZqibYyhZ20AYg=
 github.com/go-faster/errors v0.7.1/go.mod h1:5ySTjWFiphBs07IKuiL69nxdfd5+fzh1u7FPGZP2quo=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-openapi/jsonpointer v0.22.5 h1:8on/0Yp4uTb9f4XvTrM2+1CPrV05QPZXu+rvu2o9jcA=
 github.com/go-openapi/jsonpointer v0.22.5/go.mod h1:gyUR3sCvGSWchA2sUBJGluYMbe1zazrYWIkWPjjMUY0=
 github.com/go-openapi/jsonreference v0.21.5 h1:6uCGVXU/aNF13AQNggxfysJ+5ZcU4nEAe+pJyVWRdiE=
@@ -74,6 +80,8 @@ github.com/goccy/go-yaml v1.19.2 h1:PmFC1S6h8ljIz6gMRBopkjP1TVT7xuwrButHID66PoM=
 github.com/goccy/go-yaml v1.19.2/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -171,8 +179,16 @@ github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5t
 go.mongodb.org/mongo-driver v1.11.4/go.mod h1:PTSz5yu21bkT/wXpkS7WR5f0ddqw5quethTUn9WM+2g=
 go.mongodb.org/mongo-driver/v2 v2.5.0 h1:yXUhImUjjAInNcpTcAlPHiT7bIXhshCTL3jVBkF3xaE=
 go.mongodb.org/mongo-driver/v2 v2.5.0/go.mod h1:yOI9kBsufol30iFsl1slpdq1I0eHPzybRWdyYUs8K/0=
+go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
+go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
 go.opentelemetry.io/otel v1.41.0 h1:YlEwVsGAlCvczDILpUXpIpPSL/VPugt7zHThEMLce1c=
 go.opentelemetry.io/otel v1.41.0/go.mod h1:Yt4UwgEKeT05QbLwbyHXEwhnjxNO6D8L5PQP51/46dE=
+go.opentelemetry.io/otel/metric v1.41.0 h1:rFnDcs4gRzBcsO9tS8LCpgR0dxg4aaxWlJxCno7JlTQ=
+go.opentelemetry.io/otel/metric v1.41.0/go.mod h1:xPvCwd9pU0VN8tPZYzDZV/BMj9CM9vs00GuBjeKhJps=
+go.opentelemetry.io/otel/sdk v1.39.0 h1:nMLYcjVsvdui1B/4FRkwjzoRVsMK8uL/cj0OyhKzt18=
+go.opentelemetry.io/otel/sdk v1.39.0/go.mod h1:vDojkC4/jsTJsE+kh+LXYQlbL8CgrEcwmt1ENZszdJE=
+go.opentelemetry.io/otel/sdk/metric v1.39.0 h1:cXMVVFVgsIf2YL6QkRF4Urbr/aMInf+2WKg+sEJTtB8=
+go.opentelemetry.io/otel/sdk/metric v1.39.0/go.mod h1:xq9HEVH7qeX69/JnwEfp6fVq5wosJsY1mt4lLfYdVew=
 go.opentelemetry.io/otel/trace v1.41.0 h1:Vbk2co6bhj8L59ZJ6/xFTskY+tGAbOnCtQGVVa9TIN0=
 go.opentelemetry.io/otel/trace v1.41.0/go.mod h1:U1NU4ULCoxeDKc09yCWdWe+3QoyweJcISEVa1RBzOis=
 go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
@@ -243,6 +259,12 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
+gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260120221211-b8f7ae30c516 h1:sNrWoksmOyF5bvJUcnmbeAmQi8baNhqg5IWaI3llQqU=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260120221211-b8f7ae30c516/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
+google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM=
+google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
diff --git a/backend/internal/grpcsrv/commander/commander.go b/backend/internal/grpcsrv/commander/commander.go
new file mode 100644
index 0000000..1ef35c3
--- /dev/null
+++ b/backend/internal/grpcsrv/commander/commander.go
@@ -0,0 +1,130 @@
+package commander
+
+import (
+	"context"
+	"fmt"
+	"io"
+
+	"gitea.d3m0k1d.ru/d3m0k1d/HellreigN/backend/internal/models"
+	"gitea.d3m0k1d.ru/d3m0k1d/HellreigN/proto/proto"
+	"golang.org/x/sync/errgroup"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+)
+
+type Commander struct {
+	proto.UnimplementedCommanderServer
+	agents map[string]Agent
+}
+
+type Agent struct {
+	bidi   grpc.BidiStreamingServer[proto.FinishedCommand, proto.Command]
+	in     chan *proto.Command
+	jobs   map[int64]Job
+	jobber interface {
+		InitJob(ctx context.Context) (int64, error)
+		UpdateJobInDB(ctx context.Context, jid int64, msg models.JobForUpdate) (models.Job, error)
+	}
+	ctx context.Context
+}
+type JobOut struct {
+	fc  models.Job
+	err error
+}
+
+type Job struct {
+	out chan JobOut
+}
+
+func (self *Commander) GetAgent(aid string) (agent Agent, ok bool) {
+	agent, ok = self.agents[aid]
+	return
+}
+
+func (self *Agent) AddJob(job models.JobForInsert) (int64, error) {
+	jid, err := self.jobber.InitJob(self.ctx)
+	if err != nil {
+		return 0, err
+	}
+	self.in <- &proto.Command{
+		Id:      0,
+		Command: []string{},
+		Stdin:   new(string),
+	}
+	return jid, err
+}
+
+func (self *Agent) WaitJob(jid int64) (*models.Job, error) {
+	result := <-self.jobs[jid].out
+	return &result.fc, result.err
+}
+
+func (self *Commander) Stream(bidi grpc.BidiStreamingServer[proto.FinishedCommand, proto.Command]) error {
+	md, ok := metadata.FromIncomingContext(bidi.Context())
+	if !ok {
+		return fmt.Errorf("no metadata in context")
+	}
+	aidVals := md["agentid"]
+	if len(aidVals) == 0 {
+		return fmt.Errorf("agentid metadata missing")
+	}
+	aid := aidVals[0]
+	agent := newAgent(bidi)
+	self.agents[aid] = agent
+	return agent.run()
+}
+
+func (self *Agent) run() error {
+	wg := new(errgroup.Group)
+	wg.Go(self.recv)
+	wg.Go(self.send)
+	return wg.Wait()
+}
+
+func (self *Agent) recv() error {
+	for {
+		job, err := func() (job models.Job, err error) {
+			msg, err := self.bidi.Recv()
+			if err != nil {
+				return
+			}
+			return self.jobber.UpdateJobInDB(self.ctx, msg.Id, models.JobForUpdate{
+				Stdout: msg.Stdout,
+				Stderr: msg.Stderr,
+				Status: msg.Status,
+			})
+		}()
+		// TODO: that would blow up at some point
+		out := self.jobs[job.ID].out
+		out <- JobOut{
+			fc:  job,
+			err: err,
+		}
+		close(out)
+	}
+}
+
+func (self *Agent) send() error {
+	for job := range self.in {
+		self.jobs[job.Id] = newJob()
+		if err := self.bidi.Send(job); err != nil {
+			return err
+		}
+	}
+	return io.EOF
+	// self.jobs[]
+}
+
+func newAgent(bidi grpc.BidiStreamingServer[proto.FinishedCommand, proto.Command]) Agent {
+	return Agent{
+		bidi,
+		make(chan *proto.Command),
+		make(map[int64]Job),
+		nil,
+		bidi.Context(),
+	}
+}
+
+func newJob() Job {
+	return Job{make(chan JobOut, 1)}
+}
diff --git a/backend/internal/models/job.go b/backend/internal/models/job.go
new file mode 100644
index 0000000..b8ab63a
--- /dev/null
+++ b/backend/internal/models/job.go
@@ -0,0 +1,17 @@
+package models
+
+type Job struct {
+	ID int64
+
+	JobForInsert
+	JobForUpdate
+}
+type JobForInsert struct {
+	Command []string
+	Stdin   *string
+}
+type JobForUpdate struct {
+	Stdout string
+	Stderr string
+	Status int32
+}