fix(pr create): wire up @copilot assignee replacement and [bot] suffix

Two bugs introduced in cli#13009 found during acceptance testing:

1. `pr create --assignee @copilot` sent the literal `@copilot` to the
   API because NewIssueState only ran MeReplacer on assignees, not
   CopilotReplacer. Fixed by switching to SpecialAssigneeReplacer (which
   handles both @me and @copilot) like issue create already does.

2. The replaceActorsForAssignable mutation requires the [bot] suffix on
   bot actor logins (e.g. `copilot-swe-agent[bot]`), unlike
   requestReviewsByLogin which has a separate botLogins field. Added the
   suffix in ReplaceActorsForAssignableByLogin for CopilotAssigneeLogin.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: BagToad

api/queries_pr.go

@@ -599,6 +599,12 @@ func ReplaceActorsForAssignableByLogin(client *Client, repo ghrepo.Interface, as
 
 	actorLogins := make([]githubv4.String, len(logins))
 	for i, l := range logins {
+		// The replaceActorsForAssignable mutation requires the [bot] suffix
+		// for bot actor logins (e.g. "copilot-swe-agent[bot]"), unlike
+		// requestReviewsByLogin which has a separate botLogins field.
+		if l == CopilotAssigneeLogin {
+			l = l + "[bot]"
+		}
 		actorLogins[i] = githubv4.String(l)
 	}
 

pkg/cmd/issue/create/create_test.go

@@ -548,7 +548,7 @@ func Test_createRun(t *testing.T) {
 						{ "data": { "replaceActorsForAssignable": { "__typename": "" } } }
 					`, func(inputs map[string]interface{}) {
 						assert.Equal(t, "ISSUEID", inputs["assignableId"])
-						assert.Equal(t, []interface{}{"copilot-swe-agent", "MonaLisa"}, inputs["actorLogins"])
+						assert.Equal(t, []interface{}{"copilot-swe-agent[bot]", "MonaLisa"}, inputs["actorLogins"])
 					}))
 			},
 			wantsStdout: "https://github.com/OWNER/REPO/issues/12\n",
@@ -1161,7 +1161,7 @@ func TestIssueCreate_AtCopilotAssignee(t *testing.T) {
 		{ "data": { "replaceActorsForAssignable": { "__typename": "" } } }
 	`, func(inputs map[string]interface{}) {
 			assert.Equal(t, "NEWISSUEID", inputs["assignableId"])
-			assert.Equal(t, []interface{}{"copilot-swe-agent"}, inputs["actorLogins"])
+			assert.Equal(t, []interface{}{"copilot-swe-agent[bot]"}, inputs["actorLogins"])
 		}))
 
 	output, err := runCommand(http, true, `-a @copilot -t hello -b "cash rules everything around me"`, nil)

pkg/cmd/pr/create/create.go

@@ -424,7 +424,7 @@ func createRun(opts *CreateOptions) error {
 		assigneeSearchFunc = shared.RepoAssigneeSearchFunc(client, ctx.PRRefs.BaseRepo())
 	}
 
-	state, err := NewIssueState(*ctx, *opts)
+	state, err := NewIssueState(*ctx, *opts, issueFeatures.ApiActorsSupported)
 	if err != nil {
 		return err
 	}
@@ -672,14 +672,14 @@ func initDefaultTitleBody(ctx CreateContext, state *shared.IssueMetadataState, u
 	return nil
 }
 
-func NewIssueState(ctx CreateContext, opts CreateOptions) (*shared.IssueMetadataState, error) {
+func NewIssueState(ctx CreateContext, opts CreateOptions, apiActorsSupported bool) (*shared.IssueMetadataState, error) {
 	var milestoneTitles []string
 	if opts.Milestone != "" {
 		milestoneTitles = []string{opts.Milestone}
 	}
 
-	meReplacer := shared.NewMeReplacer(ctx.Client, ctx.PRRefs.BaseRepo().RepoHost())
-	assignees, err := meReplacer.ReplaceSlice(opts.Assignees)
+	assigneeReplacer := shared.NewSpecialAssigneeReplacer(ctx.Client, ctx.PRRefs.BaseRepo().RepoHost(), apiActorsSupported, !opts.WebMode)
+	assignees, err := assigneeReplacer.ReplaceSlice(opts.Assignees)
 	if err != nil {
 		return nil, err
 	}