diff --git a/loop/agent.go b/loop/agent.go
index fd01f33..466cec0 100644
--- a/loop/agent.go
+++ b/loop/agent.go
@@ -320,6 +320,7 @@
 	mu            sync.Mutex      // protects following
 	lastHEAD      string          // hash of the last HEAD that was pushed to the host
 	gitRemoteAddr string          // HTTP URL of the host git repo
+	upstream      string          // upstream branch for git work
 	seenCommits   map[string]bool // Track git commits we've already seen (by hash)
 	branchName    string
 }
@@ -336,6 +337,12 @@
 	return ags.branchName
 }
 
+func (ags *AgentGitState) Upstream() string {
+	ags.mu.Lock()
+	defer ags.mu.Unlock()
+	return ags.upstream
+}
+
 type Agent struct {
 	convo             ConvoInterface
 	config            AgentConfig // config for this agent
@@ -914,6 +921,11 @@
 	return a.originalBudget
 }
 
+// Upstream returns the upstream branch for git work
+func (a *Agent) Upstream() string {
+	return a.gitState.Upstream()
+}
+
 // AgentConfig contains configuration for creating a new Agent.
 type AgentConfig struct {
 	Context      context.Context
@@ -936,6 +948,8 @@
 	OutsideHTTP string
 	// Outtie's Git server
 	GitRemoteAddr string
+	// Upstream branch for git work
+	Upstream string
 	// Commit to checkout from Outtie
 	Commit string
 	// Prefix for git branches created by sketch
@@ -960,6 +974,7 @@
 		gitState: AgentGitState{
 			seenCommits:   make(map[string]bool),
 			gitRemoteAddr: config.GitRemoteAddr,
+			upstream:      config.Upstream,
 		},
 		outsideHostname:      config.OutsideHostname,
 		outsideOS:            config.OutsideOS,