diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ab4a6ee..bcb04ba1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,19 @@
 CHANGELOG
 =========
 
-## 0.9.3
+## 0.10.0
+- Add support for projects.
+  [#369](https://github.com/pulumi/esc/pull/369)
+
+- Deprecate legacy environment name format (<org>/<env> or <env>) in favor of <project>/<env> or <org>/<project>/<env>
+  [#375](https://github.com/pulumi/esc/pull/375)
+
 - Add command to clone environments.
   [#376](https://github.com/pulumi/esc/pull/376)
 
+- Add project filter flag to env ls command.
+  [#382](https://github.com/pulumi/esc/pull/382)
+
 ## 0.9.2
 
 - Add commands to manage environment tags.
diff --git a/cmd/esc/cli/env.go b/cmd/esc/cli/env.go
index 2b9441c2..63a5f2dd 100644
--- a/cmd/esc/cli/env.go
+++ b/cmd/esc/cli/env.go
@@ -197,7 +197,7 @@ func (cmd *envCommand) getNewEnvRef(
 	}
 
 	// Check if project at <org-name>/<project-name> exists. Assume not if listing environments errors
-	allEnvs, _ := cmd.listEnvironments(ctx, "")
+	allEnvs, _ := cmd.listEnvironments(ctx, "", "")
 	existsProject := false
 	for _, e := range allEnvs {
 		if strings.EqualFold(e.Project, ref.projectName) {
diff --git a/cmd/esc/cli/env_ls.go b/cmd/esc/cli/env_ls.go
index 3d6abc90..8044102e 100644
--- a/cmd/esc/cli/env_ls.go
+++ b/cmd/esc/cli/env_ls.go
@@ -13,7 +13,10 @@ import (
 )
 
 func newEnvLsCmd(env *envCommand) *cobra.Command {
-	var orgFilter string
+	var (
+		orgFilter     string
+		projectFilter string
+	)
 
 	cmd := &cobra.Command{
 		Use:   "ls",
@@ -30,7 +33,7 @@ func newEnvLsCmd(env *envCommand) *cobra.Command {
 				return err
 			}
 
-			allEnvs, err := env.listEnvironments(ctx, orgFilter)
+			allEnvs, err := env.listEnvironments(ctx, orgFilter, projectFilter)
 			if err != nil {
 				return err
 			}
@@ -55,12 +58,14 @@ func newEnvLsCmd(env *envCommand) *cobra.Command {
 	}
 
 	cmd.PersistentFlags().StringVarP(
-		&orgFilter, "organization", "o", "", "Filter returned stacks to those in a specific organization")
+		&orgFilter, "organization", "o", "", "Filter returned environments to those in a specific organization")
+	cmd.PersistentFlags().StringVarP(
+		&projectFilter, "project", "p", "", "Filter returned environments to those in a specific project")
 
 	return cmd
 }
 
-func (env *envCommand) listEnvironments(ctx context.Context, orgFilter string) ([]client.OrgEnvironment, error) {
+func (env *envCommand) listEnvironments(ctx context.Context, orgFilter, projectFilter string) ([]client.OrgEnvironment, error) {
 	user := env.esc.account.Username
 	continuationToken, allEnvs := "", []client.OrgEnvironment(nil)
 	for {
@@ -72,6 +77,9 @@ func (env *envCommand) listEnvironments(ctx context.Context, orgFilter string) (
 			if e.Organization == user {
 				e.Organization = ""
 			}
+			if projectFilter != "" && e.Project != projectFilter {
+				continue
+			}
 			allEnvs = append(allEnvs, e)
 		}
 		if nextToken == "" {