feat: agents desktop recordings backend (#23894)

This PR introduces screen recording of the computer use agent using the
virtual desktop.

- Screen recording is triggered by a `wait_agent` tool call. Recording
is stopped by a successful `wait_agent` tool call or when there hasn't
been any desktop activity for 10 minutes.
- Recordings are handled by the `portabledesktop` cli via the `record`
command. The videos are sped up in periods of inactivity.
- Recordings are saved to the database to the `chat_files` table.
There's a hard limit of 100MB per recording. Larger recordings are
dropped.
- A successful `wait_agent` on a computer use subagent tool call returns
a `recording_file_id`, later allowing the frontend to display the
corresponding video.
This commit is contained in:
Hugo Dutka
2026-04-02 17:23:27 +00:00
committed by GitHub
parent f796f3645f
commit 17dec2a70f
14 changed files with 2480 additions and 29 deletions
+9
View File
@@ -71,6 +71,13 @@ const (
// events cached per chat for same-replica stream catch-up.
maxDurableMessageCacheSize = 256
// maxConcurrentRecordingUploads caps the number of recording
// stop-and-store operations that can run concurrently. Each
// slot buffers up to MaxRecordingSize (100 MB) in memory, so
// this value implicitly bounds memory to roughly
// maxConcurrentRecordingUploads * 100 MB.
maxConcurrentRecordingUploads = 25
// staleRecoveryIntervalDivisor determines how often the stale
// recovery loop runs relative to the stale threshold. A value
// of 5 means recovery runs at 1/5 of the stale-after duration.
@@ -129,6 +136,7 @@ type Server struct {
usageTracker *workspacestats.UsageTracker
clock quartz.Clock
recordingSem chan struct{}
// Configuration
pendingChatAcquireInterval time.Duration
@@ -2372,6 +2380,7 @@ func New(cfg Config) *Server {
chatHeartbeatInterval: chatHeartbeatInterval,
usageTracker: cfg.UsageTracker,
clock: clk,
recordingSem: make(chan struct{}, maxConcurrentRecordingUploads),
wakeCh: make(chan struct{}, 1),
}
+107
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@@ -0,0 +1,107 @@
package chatd
import (
"context"
"fmt"
"io"
"github.com/google/uuid"
"cdr.dev/slog/v3"
"github.com/coder/coder/v2/coderd/database"
"github.com/coder/coder/v2/coderd/database/dbauthz"
"github.com/coder/coder/v2/codersdk/workspacesdk"
)
// stopAndStoreRecording stops the desktop recording, downloads the
// MP4, and stores it in chat_files. Only called when the subagent
// completed successfully. Returns the file ID on success, empty
// string on any failure. All errors are logged but not propagated
// — recording is best-effort.
func (p *Server) stopAndStoreRecording(
ctx context.Context,
conn workspacesdk.AgentConn,
recordingID string,
ownerID uuid.UUID,
workspaceID uuid.NullUUID,
) string {
select {
case p.recordingSem <- struct{}{}:
defer func() { <-p.recordingSem }()
case <-ctx.Done():
p.logger.Warn(ctx, "context canceled waiting for recording semaphore", slog.Error(ctx.Err()))
return ""
}
body, err := conn.StopDesktopRecording(ctx,
workspacesdk.StopDesktopRecordingRequest{RecordingID: recordingID})
if err != nil {
p.logger.Warn(ctx, "failed to stop desktop recording",
slog.Error(err))
return ""
}
type readResult struct {
data []byte
err error
}
ch := make(chan readResult, 1)
go func() {
data, err := io.ReadAll(io.LimitReader(body, workspacesdk.MaxRecordingSize+1))
ch <- readResult{data, err}
}()
var data []byte
select {
case res := <-ch:
body.Close()
data = res.data
if res.err != nil {
p.logger.Warn(ctx, "failed to read recording data", slog.Error(res.err))
return ""
}
case <-ctx.Done():
body.Close()
p.logger.Warn(ctx, "context canceled while reading recording data", slog.Error(ctx.Err()))
return ""
}
if len(data) > workspacesdk.MaxRecordingSize {
p.logger.Warn(ctx, "recording data exceeds maximum size, skipping store",
slog.F("size", len(data)),
slog.F("max_size", workspacesdk.MaxRecordingSize))
return ""
}
if len(data) == 0 {
p.logger.Warn(ctx, "recording data is empty, skipping store")
return ""
}
if !workspaceID.Valid {
p.logger.Warn(ctx, "chat has no workspace, cannot store recording")
return ""
}
// The chatd actor is used here because the recording is stored on
// behalf of the chat system, not a specific user request.
//nolint:gocritic // AsChatd is required to read the workspace for org lookup.
ws, err := p.db.GetWorkspaceByID(dbauthz.AsChatd(ctx), workspaceID.UUID)
if err != nil {
p.logger.Warn(ctx, "failed to resolve workspace for recording",
slog.Error(err))
return ""
}
//nolint:gocritic // AsChatd is required to insert chat files from the recording pipeline.
row, err := p.db.InsertChatFile(dbauthz.AsChatd(ctx), database.InsertChatFileParams{
OwnerID: ownerID,
OrganizationID: ws.OrganizationID,
Name: fmt.Sprintf("recording-%s.mp4", p.clock.Now().UTC().Format("2006-01-02T15-04-05Z")),
Mimetype: "video/mp4",
Data: data,
})
if err != nil {
p.logger.Warn(ctx, "failed to store recording in database",
slog.Error(err))
return ""
}
return row.ID.String()
}
+514
View File
@@ -0,0 +1,514 @@
package chatd
import (
"bytes"
"context"
"encoding/json"
"io"
"strings"
"testing"
"time"
"charm.land/fantasy"
"github.com/google/uuid"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.uber.org/mock/gomock"
"golang.org/x/xerrors"
"github.com/coder/coder/v2/coderd/database"
"github.com/coder/coder/v2/coderd/database/dbtestutil"
"github.com/coder/coder/v2/coderd/x/chatd/chatprovider"
"github.com/coder/coder/v2/codersdk/workspacesdk"
"github.com/coder/coder/v2/codersdk/workspacesdk/agentconnmock"
"github.com/coder/coder/v2/testutil"
"github.com/coder/quartz"
)
// zeroReader is an io.Reader that produces zero-valued bytes
// without allocating large buffers.
type zeroReader struct{}
func (zeroReader) Read(p []byte) (int, error) {
clear(p)
return len(p), nil
}
// createComputerUseParentChild creates a parent chat and a
// computer_use child chat bound to the given workspace/agent.
// Both chats are inserted directly via DB to avoid triggering
// background processing (which would try to call the LLM and
// use the agent connection mock).
func createComputerUseParentChild(
ctx context.Context,
t *testing.T,
server *Server,
user database.User,
model database.ChatModelConfig,
workspace database.WorkspaceTable,
agent database.WorkspaceAgent,
parentTitle, childTitle string,
) (parent, child database.Chat) {
t.Helper()
// Insert the parent chat directly via DB to avoid triggering
// the server's background processing.
parent, err := server.db.InsertChat(ctx, database.InsertChatParams{
OwnerID: user.ID,
WorkspaceID: uuid.NullUUID{UUID: workspace.ID, Valid: true},
AgentID: uuid.NullUUID{UUID: agent.ID, Valid: true},
LastModelConfigID: model.ID,
Title: parentTitle,
Status: database.ChatStatusPending,
})
require.NoError(t, err)
// Insert the child chat directly via DB to avoid triggering
// the server's background processing (which would try to run
// the chat without an LLM and get stuck).
child, err = server.db.InsertChat(ctx, database.InsertChatParams{
OwnerID: user.ID,
WorkspaceID: uuid.NullUUID{UUID: workspace.ID, Valid: true},
AgentID: uuid.NullUUID{UUID: agent.ID, Valid: true},
ParentChatID: uuid.NullUUID{UUID: parent.ID, Valid: true},
RootChatID: uuid.NullUUID{UUID: parent.ID, Valid: true},
LastModelConfigID: model.ID,
Title: childTitle,
Mode: database.NullChatMode{ChatMode: database.ChatModeComputerUse, Valid: true},
Status: database.ChatStatusPending,
})
require.NoError(t, err)
return parent, child
}
// invokeWaitAgentTool builds the wait_agent tool from the server and
// invokes it with the given child chat ID and timeout.
func invokeWaitAgentTool(
ctx context.Context,
t *testing.T,
server *Server,
db database.Store,
parentID uuid.UUID,
childID uuid.UUID,
timeoutSeconds int,
) (fantasy.ToolResponse, error) {
t.Helper()
// Re-fetch the parent so LastModelConfigID is populated.
parentChat, err := db.GetChatByID(ctx, parentID)
require.NoError(t, err)
tools := server.subagentTools(ctx, func() database.Chat { return parentChat })
tool := findToolByName(tools, "wait_agent")
require.NotNil(t, tool, "wait_agent tool must be present")
argsJSON, err := json.Marshal(map[string]any{
"chat_id": childID.String(),
"timeout_seconds": timeoutSeconds,
})
require.NoError(t, err)
return tool.Run(ctx, fantasy.ToolCall{
ID: "test-call",
Name: "wait_agent",
Input: string(argsJSON),
})
}
// TestWaitAgentComputerUseRecording verifies the happy-path recording
// flow: for a computer_use child chat that completes successfully,
// the recording is stopped, the MP4 is stored in chat_files, and the
// file ID is returned.
func TestWaitAgentComputerUseRecording(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
user, model := seedInternalChatDeps(ctx, t, db)
workspace, _, agent := seedWorkspaceBinding(t, db, user.ID)
// Create the server WITHOUT agentConnFn so the background
// processing of the parent chat doesn't use the mock.
server := newInternalTestServer(t, db, ps, chatprovider.ProviderAPIKeys{})
parent, child := createComputerUseParentChild(
ctx, t, server, user, model, workspace, agent,
"parent-recording", "computer-use-child",
)
// Wait for background processing triggered by CreateChat to
// settle before setting up the mock agent connection.
server.inflight.Wait()
// Now wire up the mock agent connection.
server.agentConnFn = func(_ context.Context, agentID uuid.UUID) (workspacesdk.AgentConn, func(), error) {
require.Equal(t, agent.ID, agentID)
return mockConn, func() {}, nil
}
// Add an assistant message so the report is extracted.
insertAssistantMessage(ctx, t, db, child.ID, model.ID, "I opened Firefox.")
// Set child to waiting (terminal success state).
setChatStatus(ctx, t, db, child.ID, database.ChatStatusWaiting, "")
// Set up mock expectations for start and stop.
fakeMp4 := []byte("fake-mp4-data-for-recording-test")
mockConn.EXPECT().
StartDesktopRecording(gomock.Any(), gomock.Any()).
DoAndReturn(func(_ context.Context, req workspacesdk.StartDesktopRecordingRequest) error {
require.NotEmpty(t, req.RecordingID, "recording ID should be non-empty")
return nil
}).
Times(1)
mockConn.EXPECT().
StopDesktopRecording(gomock.Any(), gomock.Any()).
Return(io.NopCloser(bytes.NewReader(fakeMp4)), nil).
Times(1)
// Invoke wait_agent via the tool closure.
resp, err := invokeWaitAgentTool(ctx, t, server, db, parent.ID, child.ID, 5)
require.NoError(t, err)
require.False(t, resp.IsError, "expected successful response, got: %s", resp.Content)
// Parse the response JSON and check for recording_file_id.
var result map[string]any
require.NoError(t, json.Unmarshal([]byte(resp.Content), &result))
storedFileID, ok := result["recording_file_id"].(string)
require.True(t, ok, "recording_file_id must be present in response")
require.NotEmpty(t, storedFileID)
// Verify the file was inserted into the database.
fileUUID, err := uuid.Parse(storedFileID)
require.NoError(t, err)
chatFile, err := db.GetChatFileByID(ctx, fileUUID)
require.NoError(t, err)
assert.Equal(t, "video/mp4", chatFile.Mimetype)
assert.True(t, strings.HasPrefix(chatFile.Name, "recording-"),
"expected name to start with 'recording-', got: %s", chatFile.Name)
assert.Equal(t, user.ID, chatFile.OwnerID)
assert.Equal(t, fakeMp4, chatFile.Data)
}
// TestWaitAgentNonComputerUseNoRecording verifies that when the
// child chat is NOT a computer_use chat, no recording is attempted.
// StartDesktopRecording must never be called.
func TestWaitAgentNonComputerUseNoRecording(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
user, model := seedInternalChatDeps(ctx, t, db)
server := newInternalTestServer(t, db, ps, chatprovider.ProviderAPIKeys{})
// Create parent and regular (non-computer_use) child.
parent, child := createParentChildChats(ctx, t, server, user, model)
// Add an assistant message so the report is extracted.
insertAssistantMessage(ctx, t, db, child.ID, model.ID, "Done.")
// Wait for background processing triggered by CreateChat to
// settle before setting up the mock agent connection.
server.inflight.Wait()
// Wire up the mock agent connection. The mock has zero
// expectations — gomock will fail if StartDesktopRecording
// or any other method is called.
server.agentConnFn = func(_ context.Context, agentID uuid.UUID) (workspacesdk.AgentConn, func(), error) {
return mockConn, func() {}, nil
}
setChatStatus(ctx, t, db, child.ID, database.ChatStatusWaiting, "")
// Invoke wait_agent via the tool closure — the isComputerUseChat
// guard should be false, so no recording calls fire.
resp, err := invokeWaitAgentTool(ctx, t, server, db, parent.ID, child.ID, 5)
require.NoError(t, err)
require.False(t, resp.IsError, "expected successful response, got: %s", resp.Content)
// Parse the response JSON and verify no recording_file_id.
var result map[string]any
require.NoError(t, json.Unmarshal([]byte(resp.Content), &result))
_, hasRecording := result["recording_file_id"]
assert.False(t, hasRecording, "non-computer_use chat should not produce recording_file_id")
}
// TestWaitAgentRecordingStartFails verifies that when
// StartDesktopRecording returns an error, the wait_agent flow still
// succeeds and no recording_id is produced. StopDesktopRecording
// must NOT be called since the recordingID is cleared on start
// failure.
func TestWaitAgentRecordingStartFails(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
user, model := seedInternalChatDeps(ctx, t, db)
workspace, _, agent := seedWorkspaceBinding(t, db, user.ID)
// Create the server WITHOUT agentConnFn so the background
// processing of the parent chat doesn't use the mock.
server := newInternalTestServer(t, db, ps, chatprovider.ProviderAPIKeys{})
// Create parent + computer_use child.
parent, child := createComputerUseParentChild(
ctx, t, server, user, model, workspace, agent,
"parent-start-fail", "computer-use-start-fail",
)
// Now wire up the mock agent connection.
server.agentConnFn = func(_ context.Context, agentID uuid.UUID) (workspacesdk.AgentConn, func(), error) {
return mockConn, func() {}, nil
}
insertAssistantMessage(ctx, t, db, child.ID, model.ID, "Opened the browser.")
setChatStatus(ctx, t, db, child.ID, database.ChatStatusWaiting, "")
// StartDesktopRecording fails. StopDesktopRecording must NOT
// be called — gomock enforces this: any unexpected call fails
// the test.
mockConn.EXPECT().
StartDesktopRecording(gomock.Any(), gomock.Any()).
Return(xerrors.New("ffmpeg not found")).
Times(1)
// Invoke wait_agent via the tool closure.
resp, err := invokeWaitAgentTool(ctx, t, server, db, parent.ID, child.ID, 5)
require.NoError(t, err)
require.False(t, resp.IsError, "recording failure is best-effort, tool should succeed")
// Parse response JSON and assert no recording_file_id.
var result map[string]any
require.NoError(t, json.Unmarshal([]byte(resp.Content), &result))
_, hasRecording := result["recording_file_id"]
assert.False(t, hasRecording, "no recording_file_id when start fails")
}
// TestWaitAgentRecordingStopFails verifies that when
// StopDesktopRecording returns an error, the wait_agent flow still
// succeeds but no recording_id is produced.
func TestWaitAgentRecordingStopFails(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
user, model := seedInternalChatDeps(ctx, t, db)
workspace, _, agent := seedWorkspaceBinding(t, db, user.ID)
// Create the server WITHOUT agentConnFn so the background
// processing of the parent chat doesn't use the mock.
server := newInternalTestServer(t, db, ps, chatprovider.ProviderAPIKeys{})
// Create parent + computer_use child.
parent, child := createComputerUseParentChild(
ctx, t, server, user, model, workspace, agent,
"parent-stop-fail", "computer-use-stop-fail",
)
// Now wire up the mock agent connection.
server.agentConnFn = func(_ context.Context, agentID uuid.UUID) (workspacesdk.AgentConn, func(), error) {
return mockConn, func() {}, nil
}
insertAssistantMessage(ctx, t, db, child.ID, model.ID, "Checked settings.")
setChatStatus(ctx, t, db, child.ID, database.ChatStatusWaiting, "")
// Start succeeds, stop fails.
mockConn.EXPECT().
StartDesktopRecording(gomock.Any(), gomock.Any()).
Return(nil).
Times(1)
mockConn.EXPECT().
StopDesktopRecording(gomock.Any(), gomock.Any()).
Return(nil, xerrors.New("disk full")).
Times(1)
// Invoke wait_agent via the tool closure.
resp, err := invokeWaitAgentTool(ctx, t, server, db, parent.ID, child.ID, 5)
require.NoError(t, err)
require.False(t, resp.IsError, "recording failure is best-effort, tool should succeed")
// Parse response JSON and assert no recording_file_id.
var result map[string]any
require.NoError(t, json.Unmarshal([]byte(resp.Content), &result))
_, hasRecording := result["recording_file_id"]
assert.False(t, hasRecording, "no recording_file_id when stop fails")
}
// TestWaitAgentTimeoutLeavesRecordingRunning verifies that when the
// subagent times out, StopDesktopRecording is NOT called. The
// recording is left running on the agent so the next wait_agent
// call continues it seamlessly.
func TestWaitAgentTimeoutLeavesRecordingRunning(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
mClock := quartz.NewMock(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
// Use the mock clock server; don't set agentConnFn yet.
server := newInternalTestServerWithClock(t, db, ps, chatprovider.ProviderAPIKeys{}, mClock)
user, model := seedInternalChatDeps(ctx, t, db)
workspace, _, agent := seedWorkspaceBinding(t, db, user.ID)
// Create parent + computer_use child.
_, child := createComputerUseParentChild(
ctx, t, server, user, model, workspace, agent,
"parent-timeout", "computer-use-timeout",
)
// Set child to running so it never completes.
setChatStatus(ctx, t, db, child.ID, database.ChatStatusRunning, "")
// Now wire up the mock agent connection.
server.agentConnFn = func(_ context.Context, agentID uuid.UUID) (workspacesdk.AgentConn, func(), error) {
return mockConn, func() {}, nil
}
// Start recording succeeds.
mockConn.EXPECT().
StartDesktopRecording(gomock.Any(), gomock.Any()).
Return(nil).
Times(1)
// StopDesktopRecording must NOT be called on timeout.
// gomock enforces this: any unexpected call fails the test.
// Trap the timeout timer to know when the function has entered
// its poll loop.
timerTrap := mClock.Trap().NewTimer("chatd", "subagent_await")
type toolResult struct {
resp fantasy.ToolResponse
err error
}
resultCh := make(chan toolResult, 1)
// Re-fetch the parent so LastModelConfigID is populated.
parentChat, err := db.GetChatByID(ctx, child.ParentChatID.UUID)
require.NoError(t, err)
tools := server.subagentTools(ctx, func() database.Chat { return parentChat })
tool := findToolByName(tools, "wait_agent")
require.NotNil(t, tool, "wait_agent tool must be present")
argsJSON, err := json.Marshal(map[string]any{
"chat_id": child.ID.String(),
"timeout_seconds": 1,
})
require.NoError(t, err)
go func() {
resp, runErr := tool.Run(ctx, fantasy.ToolCall{
ID: "test-timeout-call",
Name: "wait_agent",
Input: string(argsJSON),
})
resultCh <- toolResult{resp: resp, err: runErr}
}()
// Wait for the timer to be created, then release it.
timerTrap.MustWait(ctx).MustRelease(ctx)
timerTrap.Close()
// Advance past the 1s timeout.
mClock.Advance(time.Second).MustWait(ctx)
result := testutil.RequireReceive(ctx, t, resultCh)
require.NoError(t, result.err)
assert.True(t, result.resp.IsError, "expected error response on timeout")
assert.Contains(t, result.resp.Content, "timed out")
}
// TestStopAndStoreRecordingOversized verifies that when the recording
// data exceeds MaxRecordingSize, stopAndStoreRecording returns an
// empty string and does NOT call InsertChatFile.
func TestStopAndStoreRecordingOversized(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
user, _ := seedInternalChatDeps(ctx, t, db)
workspace, _, _ := seedWorkspaceBinding(t, db, user.ID)
server := newInternalTestServer(t, db, ps, chatprovider.ProviderAPIKeys{})
// Create a reader that produces MaxRecordingSize+1 bytes without
// allocating the full buffer in memory.
oversizedReader := io.LimitReader(
&zeroReader{},
int64(workspacesdk.MaxRecordingSize+1),
)
mockConn.EXPECT().
StopDesktopRecording(gomock.Any(), gomock.Any()).
Return(io.NopCloser(oversizedReader), nil).
Times(1)
recordingID := uuid.New().String()
storedFileID := server.stopAndStoreRecording(
ctx, mockConn, recordingID, user.ID,
uuid.NullUUID{UUID: workspace.ID, Valid: true},
)
assert.Empty(t, storedFileID, "oversized recording should not be stored")
}
// TestStopAndStoreRecordingEmpty verifies that when the recording
// data is empty, stopAndStoreRecording returns an empty string and
// does NOT call InsertChatFile.
func TestStopAndStoreRecordingEmpty(t *testing.T) {
t.Parallel()
db, ps := dbtestutil.NewDB(t)
ctx := chatdTestContext(t)
ctrl := gomock.NewController(t)
mockConn := agentconnmock.NewMockAgentConn(ctrl)
user, _ := seedInternalChatDeps(ctx, t, db)
workspace, _, _ := seedWorkspaceBinding(t, db, user.ID)
server := newInternalTestServer(t, db, ps, chatprovider.ProviderAPIKeys{})
// Return empty data.
mockConn.EXPECT().
StopDesktopRecording(gomock.Any(), gomock.Any()).
Return(io.NopCloser(bytes.NewReader(nil)), nil).
Times(1)
recordingID := uuid.New().String()
storedFileID := server.stopAndStoreRecording(
ctx, mockConn, recordingID, user.ID,
uuid.NullUUID{UUID: workspace.ID, Valid: true},
)
assert.Empty(t, storedFileID, "empty recording should not be stored")
}
+80 -10
View File
@@ -4,6 +4,7 @@ import (
"context"
"database/sql"
"encoding/json"
"fmt"
"sort"
"strings"
"time"
@@ -12,11 +13,13 @@ import (
"github.com/google/uuid"
"golang.org/x/xerrors"
"cdr.dev/slog/v3"
"github.com/coder/coder/v2/coderd/database"
coderdpubsub "github.com/coder/coder/v2/coderd/pubsub"
"github.com/coder/coder/v2/coderd/x/chatd/chatprompt"
"github.com/coder/coder/v2/coderd/x/chatd/chatprovider"
"github.com/coder/coder/v2/codersdk"
"github.com/coder/coder/v2/codersdk/workspacesdk"
)
var ErrSubagentNotDescendant = xerrors.New("target chat is not a descendant of current chat")
@@ -166,22 +169,89 @@ func (p *Server) subagentTools(ctx context.Context, currentChat func() database.
}
parent := currentChat()
targetChat, report, err := p.awaitSubagentCompletion(
ctx,
parent.ID,
targetChatID,
timeout,
)
if err != nil {
return fantasy.NewTextErrorResponse(err.Error()), nil
// Authorize: the target chat must be a descendant
// of the current (parent) chat.
isDescendant, descErr := isSubagentDescendant(ctx, p.db, parent.ID, targetChatID)
if descErr != nil {
return fantasy.NewTextErrorResponse(
fmt.Sprintf("failed to verify subagent relationship: %v", descErr)), nil
}
if !isDescendant {
return fantasy.NewTextErrorResponse(
"target chat is not a subagent of the current chat"), nil
}
return toolJSONResponse(map[string]any{
// Check if the target is a computer_use subagent
// and start a desktop recording. Failures are
// best-effort warnings — recording never blocks
// the wait_agent flow.
var recordingID string
var agentConn workspacesdk.AgentConn
targetChatInfo, lookupErr := p.db.GetChatByID(ctx, targetChatID)
if lookupErr != nil && !xerrors.Is(lookupErr, sql.ErrNoRows) {
p.logger.Warn(ctx, "unexpected error looking up chat for recording",
slog.F("chat_id", targetChatID),
slog.Error(lookupErr),
)
}
isComputerUseChat := lookupErr == nil && targetChatInfo.Mode.Valid &&
targetChatInfo.Mode.ChatMode == database.ChatModeComputerUse &&
targetChatInfo.AgentID.Valid
canRecord := isComputerUseChat && p.agentConnFn != nil
if canRecord {
conn, closeFn, connErr := p.agentConnFn(ctx, targetChatInfo.AgentID.UUID)
if connErr == nil {
agentConn = conn
defer closeFn()
recordingID = targetChatID.String()
startErr := conn.StartDesktopRecording(ctx,
workspacesdk.StartDesktopRecordingRequest{RecordingID: recordingID})
if startErr != nil {
p.logger.Warn(ctx, "failed to start desktop recording",
slog.Error(startErr))
recordingID = "" // Don't try to stop.
}
} else {
p.logger.Warn(ctx, "failed to get agent conn for recording",
slog.Error(connErr))
}
}
targetChat, report, awaitErr := p.awaitSubagentCompletion(
ctx, parent.ID, targetChatID, timeout,
)
// On timeout/error, leave the recording running on
// the agent so the next wait_agent call continues
// it seamlessly.
if awaitErr != nil {
return fantasy.NewTextErrorResponse(awaitErr.Error()), nil
}
// Only stop and store the recording on success.
var storedFileID string
if recordingID != "" && agentConn != nil {
// Use a fresh context for cleanup so a canceled
// parent context doesn't prevent recording storage.
stopCtx, stopCancel := context.WithTimeout(context.WithoutCancel(ctx), 90*time.Second)
defer stopCancel()
storedFileID = p.stopAndStoreRecording(stopCtx, agentConn,
recordingID, parent.OwnerID, parent.WorkspaceID)
}
resp := map[string]any{
"chat_id": targetChatID.String(),
"title": targetChat.Title,
"report": report,
"status": string(targetChat.Status),
}), nil
}
if storedFileID != "" {
resp["recording_file_id"] = storedFileID
}
return toolJSONResponse(resp), nil
},
),
fantasy.NewAgentTool(