Remove hexai-tmux-edit popup editor featurev0.42.0

The tmux popup editor and its per-agent detection (Cursor/Amp/Aider)
added maintenance surface without enough use to justify it; Codex and
Claude Code already support external-editor mode natively via Ctrl+G.
Drops internal/tmuxedit, cmd/hexai-tmux-edit, the [tmux_edit] config
schema, the Mage build target, and all related docs/README mentions.

Bump version to 0.42.0.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

1 files changed, 0 insertions, 111 deletions

diff --git a/cmd/hexai-tmux-edit/main_test.go b/cmd/hexai-tmux-edit/main_test.go
deleted file mode 100644
index 3171b86..0000000
--- a/cmd/hexai-tmux-edit/main_test.go
+++ /dev/null
@@ -1,111 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"errors"
-	"strings"
-	"testing"
-
-	"codeberg.org/snonux/hexai/internal/tmuxedit"
-)
-
-func TestBuildOptions_AllEmpty(t *testing.T) {
-	opts := buildOptions("", "", "")
-	if opts.ConfigPath != "" || opts.Agent != "" || opts.Pane != "" {
-		t.Fatalf("expected all empty, got %+v", opts)
-	}
-}
-
-func TestBuildOptions_TrimsWhitespace(t *testing.T) {
-	opts := buildOptions("  /tmp/cfg.toml  ", "  claude  ", "  %5  ")
-	if opts.ConfigPath != "/tmp/cfg.toml" {
-		t.Fatalf("expected trimmed config path, got %q", opts.ConfigPath)
-	}
-	if opts.Agent != "claude" {
-		t.Fatalf("expected trimmed agent, got %q", opts.Agent)
-	}
-	if opts.Pane != "%5" {
-		t.Fatalf("expected trimmed pane, got %q", opts.Pane)
-	}
-}
-
-func TestRunTmuxEdit_Success(t *testing.T) {
-	var gotOpts tmuxedit.Options
-	a := &app{runTmuxEdit: func(opts tmuxedit.Options) error {
-		gotOpts = opts
-		return nil
-	}}
-
-	opts := buildOptions("/tmp/cfg.toml", "cursor", "%3")
-	if err := a.runTmuxEdit(opts); err != nil {
-		t.Fatalf("runTmuxEdit: %v", err)
-	}
-	if gotOpts.ConfigPath != "/tmp/cfg.toml" || gotOpts.Agent != "cursor" || gotOpts.Pane != "%3" {
-		t.Fatalf("unexpected opts: %+v", gotOpts)
-	}
-}
-
-func TestRunTmuxEdit_Error(t *testing.T) {
-	wantErr := errors.New("tmux not found")
-	a := &app{runTmuxEdit: func(_ tmuxedit.Options) error { return wantErr }}
-
-	if err := a.runTmuxEdit(tmuxedit.Options{}); !errors.Is(err, wantErr) {
-		t.Fatalf("expected error, got: %v", err)
-	}
-}
-
-// runMain happy path: flags parse, runTmuxEdit returns nil, exit code 0.
-// We capture the resolved Options to confirm flags map onto fields correctly.
-func TestRunMain_FlagsForwardedToTmuxedit(t *testing.T) {
-	var got tmuxedit.Options
-	a := &app{runTmuxEdit: func(opts tmuxedit.Options) error {
-		got = opts
-		return nil
-	}}
-
-	var stderr bytes.Buffer
-	code := a.runMain([]string{"-config", "  /tmp/cfg.toml ", "-agent", "claude", "-pane", "%9"}, &stderr)
-	if code != 0 {
-		t.Fatalf("runMain code = %d, want 0", code)
-	}
-	if got.ConfigPath != "/tmp/cfg.toml" || got.Agent != "claude" || got.Pane != "%9" {
-		t.Fatalf("unexpected opts: %+v", got)
-	}
-	if stderr.Len() != 0 {
-		t.Fatalf("stderr should be empty on success, got %q", stderr.String())
-	}
-}
-
-// runMain reports tmuxedit.Run failures by writing to stderr and returning 1
-// — the production exit code that the shipped binary uses.
-func TestRunMain_RunErrorReturnsOne(t *testing.T) {
-	a := &app{runTmuxEdit: func(tmuxedit.Options) error { return errors.New("boom") }}
-
-	var stderr bytes.Buffer
-	code := a.runMain(nil, &stderr)
-	if code != 1 {
-		t.Fatalf("runMain code = %d, want 1", code)
-	}
-	if !strings.Contains(stderr.String(), "boom") {
-		t.Fatalf("stderr missing error: %q", stderr.String())
-	}
-}
-
-// Unknown flags must yield exit 2 (the convention used by stdlib `flag` when
-// ExitOnError aborts) without ever invoking runTmuxEdit.
-func TestRunMain_BadFlagReturnsTwo(t *testing.T) {
-	called := false
-	a := &app{runTmuxEdit: func(tmuxedit.Options) error {
-		called = true
-		return nil
-	}}
-
-	var stderr bytes.Buffer
-	code := a.runMain([]string{"--no-such-flag"}, &stderr)
-	if code != 2 {
-		t.Fatalf("runMain code = %d, want 2", code)
-	}
-	if called {
-		t.Fatal("runTmuxEdit must not be called on flag-parse failure")
-	}
-}