Add server-side workflows with YAML files, task freeze and lead tools

internal/agents/process.go

@@ -5,13 +5,13 @@ import (
 	"fmt"
 	"log/slog"
 	"os"
-	"strings"
 	"time"
 
 	"g.fc.run/misc/byre/internal/api"
 	"g.fc.run/misc/byre/internal/claude"
 	"g.fc.run/misc/byre/internal/codex"
 	"g.fc.run/misc/byre/internal/mcp"
+	"g.fc.run/misc/byre/internal/workflow"
 )
 
 type image struct {
@@ -30,13 +30,6 @@ type agentProcess interface {
 	drive(m *Manager, l *live)
 }
 
-func vendorOf(model string) api.AgentSessionVendor {
-	if strings.HasPrefix(model, "gpt-") {
-		return api.Codex
-	}
-	return api.Claude
-}
-
 func initialVendorSessionID(vendor api.AgentSessionVendor, id string) string {
 	if vendor == api.Codex {
 		return ""
@@ -45,8 +38,8 @@ func initialVendorSessionID(vendor api.AgentSessionVendor, id string) string {
 }
 
 func checkModel(sess api.AgentSession, model string) error {
-	if vendorOf(model) != sess.Vendor {
-		return fmt.Errorf("%w: session %s is %s; %s is a %s model", ErrInvalid, sess.Id, sess.Vendor, model, vendorOf(model))
+	if workflow.VendorOf(model) != sess.Vendor {
+		return fmt.Errorf("%w: session %s is %s; %s is a %s model", ErrInvalid, sess.Id, sess.Vendor, model, workflow.VendorOf(model))
 	}
 	return nil
 }