diff --git a/gocomplete/complete.go b/gocomplete/complete.go
index 00392eb..9f46dcd 100644
--- a/gocomplete/complete.go
+++ b/gocomplete/complete.go
@@ -126,11 +126,264 @@ func main() {
 		Args: complete.PredictOr(anyPackage, ellipsis),
 	}
 
+	doc := complete.Command{
+		Flags: complete.Flags{
+			"-c":   complete.PredictNothing,
+			"-cmd": complete.PredictNothing,
+			"-u":   complete.PredictNothing,
+		},
+		Args: anyPackage,
+	}
+
 	tool := complete.Command{
 		Flags: complete.Flags{
 			"-n": complete.PredictNothing,
 		},
-		Args: complete.PredictAnything,
+		Sub: complete.Commands{
+			"addr2line": {
+				Args: anyFile,
+			},
+			"asm": {
+				Flags: complete.Flags{
+					"-D":        complete.PredictAnything,
+					"-I":        complete.PredictDirs("*"),
+					"-S":        complete.PredictNothing,
+					"-debug":    complete.PredictNothing,
+					"-dynlink":  complete.PredictNothing,
+					"-e":        complete.PredictNothing,
+					"-o":        anyFile,
+					"-shared":   complete.PredictNothing,
+					"-trimpath": complete.PredictNothing,
+				},
+				Args: complete.PredictFiles("*.s"),
+			},
+			"cgo": {
+				Flags: complete.Flags{
+					"-debug-define":      complete.PredictNothing,
+					"debug-gcc":          complete.PredictNothing,
+					"dynimport":          anyFile,
+					"dynlinker":          complete.PredictNothing,
+					"dynout":             anyFile,
+					"dynpackage":         anyPackage,
+					"exportheader":       complete.PredictDirs("*"),
+					"gccgo":              complete.PredictNothing,
+					"gccgopkgpath":       complete.PredictDirs("*"),
+					"gccgoprefix":        complete.PredictAnything,
+					"godefs":             complete.PredictNothing,
+					"import_runtime_cgo": complete.PredictNothing,
+					"import_syscall":     complete.PredictNothing,
+					"importpath":         complete.PredictDirs("*"),
+					"objdir":             complete.PredictDirs("*"),
+					"srcdir":             complete.PredictDirs("*"),
+				},
+				Args: goFiles,
+			},
+			"compile": {
+				Flags: complete.Flags{
+					"-%":              complete.PredictNothing,
+					"-+":              complete.PredictNothing,
+					"-B":              complete.PredictNothing,
+					"-D":              complete.PredictDirs("*"),
+					"-E":              complete.PredictNothing,
+					"-I":              complete.PredictDirs("*"),
+					"-K":              complete.PredictNothing,
+					"-N":              complete.PredictNothing,
+					"-S":              complete.PredictNothing,
+					"-V":              complete.PredictNothing,
+					"-W":              complete.PredictNothing,
+					"-asmhdr":         anyFile,
+					"-bench":          anyFile,
+					"-buildid":        complete.PredictNothing,
+					"-complete":       complete.PredictNothing,
+					"-cpuprofile":     anyFile,
+					"-d":              complete.PredictNothing,
+					"-dynlink":        complete.PredictNothing,
+					"-e":              complete.PredictNothing,
+					"-f":              complete.PredictNothing,
+					"-h":              complete.PredictNothing,
+					"-i":              complete.PredictNothing,
+					"-importmap":      complete.PredictAnything,
+					"-installsuffix":  complete.PredictAnything,
+					"-j":              complete.PredictNothing,
+					"-l":              complete.PredictNothing,
+					"-largemodel":     complete.PredictNothing,
+					"-linkobj":        anyFile,
+					"-live":           complete.PredictNothing,
+					"-m":              complete.PredictNothing,
+					"-memprofile":     complete.PredictNothing,
+					"-memprofilerate": complete.PredictAnything,
+					"-msan":           complete.PredictNothing,
+					"-nolocalimports": complete.PredictNothing,
+					"-o":              anyFile,
+					"-p":              complete.PredictDirs("*"),
+					"-pack":           complete.PredictNothing,
+					"-r":              complete.PredictNothing,
+					"-race":           complete.PredictNothing,
+					"-s":              complete.PredictNothing,
+					"-shared":         complete.PredictNothing,
+					"-traceprofile":   anyFile,
+					"-trimpath":       complete.PredictAnything,
+					"-u":              complete.PredictNothing,
+					"-v":              complete.PredictNothing,
+					"-w":              complete.PredictNothing,
+					"-wb":             complete.PredictNothing,
+				},
+				Args: goFiles,
+			},
+			"cover": {
+				Flags: complete.Flags{
+					"-func": complete.PredictAnything,
+					"-html": complete.PredictAnything,
+					"-mode": complete.PredictSet("set", "count", "atomic"),
+					"-o":    anyFile,
+					"-var":  complete.PredictAnything,
+				},
+				Args: anyFile,
+			},
+			"dist": {
+				Sub: complete.Commands{
+					"banner":    {Flags: complete.Flags{"-v": complete.PredictNothing}},
+					"bootstrap": {Flags: complete.Flags{"-v": complete.PredictNothing}},
+					"clean":     {Flags: complete.Flags{"-v": complete.PredictNothing}},
+					"env":       {Flags: complete.Flags{"-v": complete.PredictNothing, "-p": complete.PredictNothing}},
+					"install":   {Flags: complete.Flags{"-v": complete.PredictNothing}, Args: complete.PredictDirs("*")},
+					"list":      {Flags: complete.Flags{"-v": complete.PredictNothing, "-json": complete.PredictNothing}},
+					"test":      {Flags: complete.Flags{"-v": complete.PredictNothing, "-h": complete.PredictNothing}},
+					"version":   {Flags: complete.Flags{"-v": complete.PredictNothing}},
+				},
+			},
+			"doc": doc,
+			"fix": {
+				Flags: complete.Flags{
+					"-diff":  complete.PredictNothing,
+					"-force": complete.PredictAnything,
+					"-r":     complete.PredictSet("context", "gotypes", "netipv6zone", "printerconfig"),
+				},
+				Args: anyGo,
+			},
+			"link": {},
+			"nm": {
+				Flags: complete.Flags{
+					"-n":    complete.PredictNothing,
+					"-size": complete.PredictNothing,
+					"-sort": complete.PredictAnything,
+					"-type": complete.PredictNothing,
+				},
+				Args: anyGo,
+			},
+			"objdump": {
+				Flags: complete.Flags{
+					"-s": complete.PredictAnything,
+				},
+				Args: anyFile,
+			},
+			"pack": {},
+			"pprof": {
+				Flags: complete.Flags{
+					"-callgrind":     complete.PredictNothing,
+					"-disasm":        complete.PredictAnything,
+					"-dot":           complete.PredictNothing,
+					"-eog":           complete.PredictNothing,
+					"-evince":        complete.PredictNothing,
+					"-gif":           complete.PredictNothing,
+					"-gv":            complete.PredictNothing,
+					"-list":          complete.PredictAnything,
+					"-pdf":           complete.PredictNothing,
+					"-peek":          complete.PredictAnything,
+					"-png":           complete.PredictNothing,
+					"-proto":         complete.PredictNothing,
+					"-ps":            complete.PredictNothing,
+					"-raw":           complete.PredictNothing,
+					"-svg":           complete.PredictNothing,
+					"-tags":          complete.PredictNothing,
+					"-text":          complete.PredictNothing,
+					"-top":           complete.PredictNothing,
+					"-tree":          complete.PredictNothing,
+					"-web":           complete.PredictNothing,
+					"-weblist":       complete.PredictAnything,
+					"-output":        anyFile,
+					"-functions":     complete.PredictNothing,
+					"-files":         complete.PredictNothing,
+					"-lines":         complete.PredictNothing,
+					"-addresses":     complete.PredictNothing,
+					"-base":          complete.PredictAnything,
+					"-drop_negative": complete.PredictNothing,
+					"-cum":           complete.PredictNothing,
+					"-seconds":       complete.PredictAnything,
+					"-nodecount":     complete.PredictAnything,
+					"-nodefraction":  complete.PredictAnything,
+					"-edgefraction":  complete.PredictAnything,
+					"-sample_index":  complete.PredictNothing,
+					"-mean":          complete.PredictNothing,
+					"-inuse_space":   complete.PredictNothing,
+					"-inuse_objects": complete.PredictNothing,
+					"-alloc_space":   complete.PredictNothing,
+					"-alloc_objects": complete.PredictNothing,
+					"-total_delay":   complete.PredictNothing,
+					"-contentions":   complete.PredictNothing,
+					"-mean_delay":    complete.PredictNothing,
+					"-runtime":       complete.PredictNothing,
+					"-focus":         complete.PredictAnything,
+					"-ignore":        complete.PredictAnything,
+					"-tagfocus":      complete.PredictAnything,
+					"-tagignore":     complete.PredictAnything,
+					"-call_tree":     complete.PredictNothing,
+					"-unit":          complete.PredictAnything,
+					"-divide_by":     complete.PredictAnything,
+					"-buildid":       complete.PredictAnything,
+					"-tools":         complete.PredictDirs("*"),
+					"-help":          complete.PredictNothing,
+				},
+				Args: anyFile,
+			},
+			"tour": {
+				Flags: complete.Flags{
+					"-http":        complete.PredictAnything,
+					"-openbrowser": complete.PredictNothing,
+				},
+			},
+			"trace": {
+				Flags: complete.Flags{
+					"-http":  complete.PredictAnything,
+					"-pprof": complete.PredictSet("net", "sync", "syscall", "sched"),
+				},
+				Args: anyFile,
+			},
+			"vet": {
+				Flags: complete.Flags{
+					"-all":                 complete.PredictNothing,
+					"-asmdecl":             complete.PredictNothing,
+					"-assign":              complete.PredictNothing,
+					"-atomic":              complete.PredictNothing,
+					"-bool":                complete.PredictNothing,
+					"-buildtags":           complete.PredictNothing,
+					"-cgocall":             complete.PredictNothing,
+					"-composites":          complete.PredictNothing,
+					"-compositewhitelist":  complete.PredictNothing,
+					"-copylocks":           complete.PredictNothing,
+					"-httpresponse":        complete.PredictNothing,
+					"-lostcancel":          complete.PredictNothing,
+					"-methods":             complete.PredictNothing,
+					"-nilfunc":             complete.PredictNothing,
+					"-printf":              complete.PredictNothing,
+					"-printfuncs":          complete.PredictAnything,
+					"-rangeloops":          complete.PredictNothing,
+					"-shadow":              complete.PredictNothing,
+					"-shadowstrict":        complete.PredictNothing,
+					"-shift":               complete.PredictNothing,
+					"-structtags":          complete.PredictNothing,
+					"-tags":                complete.PredictAnything,
+					"-tests":               complete.PredictNothing,
+					"-unreachable":         complete.PredictNothing,
+					"-unsafeptr":           complete.PredictNothing,
+					"-unusedfuncs":         complete.PredictAnything,
+					"-unusedresult":        complete.PredictNothing,
+					"-unusedstringmethods": complete.PredictAnything,
+					"-v": complete.PredictNothing,
+				},
+				Args: anyGo,
+			},
+		},
 	}
 
 	clean := complete.Command{
@@ -174,6 +427,7 @@ func main() {
 			"generate": generate,
 			"vet":      vet,
 			"list":     list,
+			"doc":      doc,
 			"tool":     tool,
 			"clean":    clean,
 			"env":      env,