Let workflows merge or discard their own tasks

internal/agents/workflows.go

@@ -745,6 +745,8 @@ const workflowDefinitionSchema = `{
 	"type": "object",
 	"properties": {
 		"description": {"type": "string"},
+		"auto_merge": {"type": "boolean"},
+		"auto_discard": {"type": "boolean"},
 		"steps": {"type": "array", "items": {"$ref": "#/$defs/step"}}
 	},
 	"required": ["steps"],
@@ -892,7 +894,7 @@ func (m *Manager) workflowTools(tool func(name, description, schema string, run
 
 		tool("set_audit_workflow",
 			"Set the audit workflow (any saved workflow) that byre runs in the background on a project's default branch: one run at a time, started whenever the branch's newest commit hasn't had one, to check the whole codebase against its standards rather than one change. "+
-				"An audit's tasks stay out of list_tasks and your signals until one asks a question, calls ready_for_merge or hits an error; one that suggests discarding first is discarded by byre. An empty workflow turns audits off. Only when the human asks.",
+				"An audit's tasks stay out of list_tasks and your signals until one asks a question, calls ready_for_merge, hits an error, or suggests discarding in a workflow without auto_discard. An empty workflow turns audits off. Only when the human asks.",
 			`{"type": "object", "properties": {
 				"project_id": {"type": "string"},
 				"workflow": {"type": "string"}