feat: parse all Go CLIs with flaggy; dump bash complete.

stdlib flag dropped --hop after the query. One wrapper in internal/cli,
source <(./bin/cli/complete.go bash). Gitea #34.

internal/brain/rank/args.go

@@ -3,12 +3,15 @@ package rank
 import (
 	"fmt"
 	"strconv"
-	"strings"
+
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
 )
 
 const Usage = `usage: bin/brain/search.go "query" [--root facts|info] [--repo REPO] [-n N] [--hop N] [--json] [--no-web]
        bin/brain/search.go serve [port]
-       bin/brain/search.go --list-model`
+       bin/brain/search.go --list-model
+       source <(./bin/cli/complete.go bash)`
 
 type Options struct {
 	Query     string
@@ -21,62 +24,57 @@ type Options struct {
 	NoWeb     bool
 }
 
+// NewParser is the flaggy schema for search (also used by bin/cli/complete.go).
+func NewParser(opt *Options) *flaggy.Parser {
+	if opt.Limit == 0 {
+		opt.Limit = 20
+	}
+	p := cli.New("brain-search")
+	p.Description = "deduction search: facts → info → web"
+	p.String(&opt.Root, "", "root", "facts or info")
+	p.String(&opt.Repo, "", "repo", "filter by repo")
+	p.Int(&opt.Limit, "n", "n", "max hits")
+	p.Int(&opt.Hop, "", "hop", "walk FROM_FILE depth 1-3")
+	p.Bool(&opt.JSONOut, "", "json", "JSON output")
+	p.Bool(&opt.NoWeb, "", "no-web", "stay local")
+	p.Bool(&opt.ListModel, "", "list-model", "print embedding model")
+	return p
+}
+
 // ParseArgs reads flags. Unknown flags are an error: silently dropping them
 // meant `--hop 1` vanished and its argument `1` was appended to the query.
 func ParseArgs(args []string) (Options, error) {
 	opt := Options{Limit: 20}
-	var queryArgs []string
-
-	for i := 0; i < len(args); i++ {
-		arg := args[i]
-		wantsValue := arg == "--root" || arg == "--repo" || arg == "-n" || arg == "--hop"
-		if wantsValue && i+1 >= len(args) {
-			return opt, fmt.Errorf("%s needs a value", arg)
-		}
-		switch arg {
-		case "--root":
-			i++
-			opt.Root = args[i]
-			if opt.Root != "facts" && opt.Root != "info" {
-				return opt, fmt.Errorf("--root must be facts or info, got %q", opt.Root)
-			}
-		case "--repo":
-			i++
-			opt.Repo = args[i]
-		case "-n":
-			i++
-			n, err := strconv.Atoi(args[i])
-			if err != nil || n < 1 {
-				return opt, fmt.Errorf("-n must be a positive integer, got %q", args[i])
-			}
-			opt.Limit = n
-		case "--hop":
-			i++
-			n, err := strconv.Atoi(args[i])
-			if err != nil || n < 1 {
-				return opt, fmt.Errorf("--hop must be a positive integer, got %q", args[i])
-			}
-			if n > 3 {
-				return opt, fmt.Errorf("--hop max is 3 (File → Commit → Person)")
-			}
-			opt.Hop = n
-		case "--json":
-			opt.JSONOut = true
-		case "--no-web":
-			opt.NoWeb = true
-		case "--list-model":
-			opt.ListModel = true
-		default:
-			if strings.HasPrefix(arg, "-") {
-				return opt, fmt.Errorf("unknown flag %q", arg)
-			}
-			queryArgs = append(queryArgs, arg)
-		}
+	p := NewParser(&opt)
+	var q string
+	p.AddPositionalValue(&q, "query", 1, false, "search query")
+	if err := cli.Parse(p, args); err != nil {
+		return opt, err
+	}
+	opt.Query = cli.Query(q, p.TrailingArguments)
+	if opt.Root != "" && opt.Root != "facts" && opt.Root != "info" {
+		return opt, fmt.Errorf("--root must be facts or info, got %q", opt.Root)
+	}
+	if opt.Limit < 1 {
+		return opt, fmt.Errorf("-n must be a positive integer, got %q", strconv.Itoa(opt.Limit))
+	}
+	if opt.Hop < 0 {
+		return opt, fmt.Errorf("--hop must be a positive integer, got %q", strconv.Itoa(opt.Hop))
+	}
+	if opt.Hop > 3 {
+		return opt, fmt.Errorf("--hop max is 3 (File → Commit → Person)")
 	}
-
-	opt.Query = strings.TrimSpace(strings.Join(queryArgs, " "))
 	if opt.Query == "" && !opt.ListModel {
 		return opt, fmt.Errorf("no query given")
 	}
 	return opt, nil
 }
+
+// Parser is the search schema for bin/cli/complete.go.
+func Parser() *flaggy.Parser {
+	opt := Options{Limit: 20}
+	p := NewParser(&opt)
+	var q string
+	p.AddPositionalValue(&q, "query", 1, false, "search query")
+	return p
+}

internal/brain/rank/readargs.go

@@ -0,0 +1,59 @@
+package rank
+
+import (
+	"fmt"
+
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type GetOptions struct {
+	ID      string
+	Body    bool
+	JSONOut bool
+}
+
+func GetParser(opt *GetOptions) *flaggy.Parser {
+	p := cli.New("brain-get")
+	p.Description = "read one leaf"
+	p.Bool(&opt.Body, "", "body", "full text instead of snippet")
+	p.Bool(&opt.JSONOut, "", "json", "JSON output")
+	p.AddPositionalValue(&opt.ID, "id", 1, false, "leaf id")
+	return p
+}
+
+func ParseGet(args []string) (GetOptions, error) {
+	var opt GetOptions
+	if err := cli.Parse(GetParser(&opt), args); err != nil {
+		return opt, err
+	}
+	if opt.ID == "" {
+		return opt, fmt.Errorf("id required")
+	}
+	return opt, nil
+}
+
+type JSONFlag struct {
+	JSONOut bool
+}
+
+func bindJSON(name string, opt *JSONFlag) *flaggy.Parser {
+	p := cli.New(name)
+	p.Bool(&opt.JSONOut, "", "json", "JSON output")
+	return p
+}
+
+func StatsParser() *flaggy.Parser {
+	opt := JSONFlag{}
+	return bindJSON("brain-stats", &opt)
+}
+
+func EvalParser() *flaggy.Parser {
+	opt := JSONFlag{}
+	return bindJSON("brain-eval", &opt)
+}
+
+func ParseJSONFlag(name string, args []string) (JSONFlag, error) {
+	var opt JSONFlag
+	return opt, cli.Parse(bindJSON(name, &opt), args)
+}

internal/brain/read.go

@@ -11,30 +11,15 @@ import (
 	"unicode/utf8"
 
 	"github.com/eSlider/2dph/internal/brain/rank"
+	"github.com/eSlider/2dph/internal/cli"
 )
 
 func MainGet(args []string) int {
-	id, body, jsonOut := "", false, false
-	for _, a := range args {
-		switch {
-		case a == "--body":
-			body = true
-		case a == "--json":
-			jsonOut = true
-		case a == "-h" || a == "--help":
-			fmt.Fprintln(os.Stderr, `usage: bin/brain/get.go <id> [--body] [--json]`)
-			return 0
-		case strings.HasPrefix(a, "-"):
-			fmt.Fprintf(os.Stderr, "brain/get: unknown flag %s\n", a)
-			return 2
-		default:
-			id = a
-		}
-	}
-	if id == "" {
-		fmt.Fprintln(os.Stderr, "brain/get: id required")
-		return 2
+	opt, err := rank.ParseGet(args)
+	if err != nil {
+		return cli.Fail(err)
 	}
+	id, body, jsonOut := opt.ID, opt.Body, opt.JSONOut
 	if err := openBrain(); err != nil {
 		fmt.Fprintf(os.Stderr, "open brain: %v\n", err)
 		return 1
@@ -72,21 +57,11 @@ func MainGet(args []string) int {
 }
 
 func MainStats(args []string) int {
-	jsonOut := false
-	for _, a := range args {
-		switch a {
-		case "--json":
-			jsonOut = true
-		case "-h", "--help":
-			fmt.Fprintln(os.Stderr, `usage: bin/brain/stats.go [--json]`)
-			return 0
-		default:
-			if strings.HasPrefix(a, "-") {
-				fmt.Fprintf(os.Stderr, "brain/stats: unknown flag %s\n", a)
-				return 2
-			}
-		}
+	opt, err := rank.ParseJSONFlag("brain-stats", args)
+	if err != nil {
+		return cli.Fail(err)
 	}
+	jsonOut := opt.JSONOut
 	if err := openBrain(); err != nil {
 		fmt.Fprintf(os.Stderr, "open brain: %v\n", err)
 		return 1
@@ -124,21 +99,11 @@ func MainStats(args []string) int {
 }
 
 func MainEval(args []string) int {
-	jsonOut := false
-	for _, a := range args {
-		switch a {
-		case "--json":
-			jsonOut = true
-		case "-h", "--help":
-			fmt.Fprintln(os.Stderr, `usage: bin/brain/eval.go [--json]`)
-			return 0
-		default:
-			if strings.HasPrefix(a, "-") {
-				fmt.Fprintf(os.Stderr, "brain/eval: unknown flag %s\n", a)
-				return 2
-			}
-		}
+	opt, err := rank.ParseJSONFlag("brain-eval", args)
+	if err != nil {
+		return cli.Fail(err)
 	}
+	jsonOut := opt.JSONOut
 	if err := openBrain(); err != nil {
 		fmt.Fprintf(os.Stderr, "open brain: %v\n", err)
 		return 1

internal/brain/search.go

@@ -20,6 +20,7 @@ import (
 
 	lbug "github.com/LadybugDB/go-ladybug"
 	"github.com/eSlider/2dph/internal/brain/rank"
+	"github.com/eSlider/2dph/internal/cli"
 )
 
 const defaultPort = 17830
@@ -29,6 +30,9 @@ const healthPath = "/health"
 func runSearch(args []string) int {
 	opt, err := rank.ParseArgs(args)
 	if err != nil {
+		if errors.Is(err, cli.ErrHelp) {
+			return 0
+		}
 		fmt.Fprintf(os.Stderr, "brain/search: %v\n%s\n", err, rank.Usage)
 		return 2
 	}

internal/chats/apply.go

@@ -3,21 +3,22 @@ package chats
 import (
 	"bytes"
 	"encoding/json"
-	"flag"
 	"fmt"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
+
+	cliparse "github.com/eSlider/2dph/internal/cli"
 )
 
 type ooContact struct {
-	ID         int    `json:"id"`
+	ID          int    `json:"id"`
 	DisplayName string `json:"displayName"`
-	FirstName  string `json:"firstName"`
-	LastName   string `json:"lastName"`
-	About      string `json:"about"`
-	CommonData []struct {
+	FirstName   string `json:"firstName"`
+	LastName    string `json:"lastName"`
+	About       string `json:"about"`
+	CommonData  []struct {
 		InfoType int    `json:"infoType"`
 		Data     string `json:"data"`
 		Category string `json:"categoryName"`
@@ -25,16 +26,9 @@ type ooContact struct {
 }
 
 func RunApply(args []string) int {
-	fs := flag.NewFlagSet("chats apply", flag.ContinueOnError)
-	dryRun := fs.Bool("dry-run", false, "show what would be done without writing")
-	help := fs.Bool("help", false, "")
-	fs.SetOutput(os.Stderr)
-	if err := fs.Parse(args); err != nil {
-		return 2
-	}
-	if *help {
-		fmt.Fprintln(os.Stderr, "usage: chats apply [--dry-run]")
-		return 0
+	dryRun, err := parseApplyFlags(args)
+	if err != nil {
+		return cliparse.Fail(err)
 	}
 
 	ooCLI := findOO()
@@ -60,10 +54,10 @@ func RunApply(args []string) int {
 	emailFacts = dedupeFacts(emailFacts)
 
 	type resolvedFact struct {
-		Fact       ExtractedFact
-		OoID       int
-		OoName     string
-		Action     string // "info-add" or "persons-create"
+		Fact   ExtractedFact
+		OoID   int
+		OoName string
+		Action string // "info-add" or "persons-create"
 	}
 
 	var resolved []resolvedFact
@@ -128,7 +122,7 @@ func RunApply(args []string) int {
 
 	fmt.Printf("\nchats apply: %d actions to apply\n", len(resolved))
 
-	if *dryRun {
+	if dryRun {
 		for _, r := range resolved {
 			switch r.Action {
 			case "info-add":

internal/chats/cli.go

@@ -0,0 +1,74 @@
+package chats
+
+import (
+	cliparse "github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type syncTelegramFlags struct {
+	Limit int
+	Phone string
+}
+
+type syncLinkedInFlags struct {
+	Limit   int
+	Refresh bool
+}
+
+func SyncParser() *flaggy.Parser {
+	p := cliparse.New("chats-sync")
+	p.Description = "download chats to var/chats"
+	tg := flaggy.NewSubcommand("telegram")
+	li := flaggy.NewSubcommand("linkedin")
+	var limit int
+	var phone string
+	var refresh bool
+	tg.Int(&limit, "", "limit", "max messages per chat")
+	tg.String(&phone, "", "phone", "phone (default TELEGRAM_PHONE)")
+	li.Int(&limit, "", "limit", "max messages per conversation")
+	li.Bool(&refresh, "", "refresh", "refresh webtop session")
+	p.AttachSubcommand(tg, 1)
+	p.AttachSubcommand(li, 1)
+	return p
+}
+
+func ImportParser() *flaggy.Parser {
+	return cliparse.New("chats-import")
+}
+
+func FactsParser() *flaggy.Parser {
+	return cliparse.New("chats-facts")
+}
+
+func ApplyParser() *flaggy.Parser {
+	p := cliparse.New("chats-apply")
+	dry := false
+	p.Bool(&dry, "", "dry-run", "show without writing")
+	return p
+}
+
+func parseTelegramFlags(args []string) (syncTelegramFlags, error) {
+	var f syncTelegramFlags
+	p := cliparse.New("chats-sync-telegram")
+	p.Int(&f.Limit, "", "limit", "max messages per chat")
+	p.String(&f.Phone, "", "phone", "phone (default TELEGRAM_PHONE)")
+	return f, cliparse.Parse(p, args)
+}
+
+func parseLinkedInFlags(args []string) (syncLinkedInFlags, error) {
+	var f syncLinkedInFlags
+	p := cliparse.New("chats-sync-linkedin")
+	p.Int(&f.Limit, "", "limit", "max messages per conversation")
+	p.Bool(&f.Refresh, "", "refresh", "refresh webtop session")
+	return f, cliparse.Parse(p, args)
+}
+
+func parseApplyFlags(args []string) (dryRun bool, err error) {
+	p := cliparse.New("chats-apply")
+	p.Bool(&dryRun, "", "dry-run", "show without writing")
+	return dryRun, cliparse.Parse(p, args)
+}
+
+func parseNoFlags(name string, args []string) error {
+	return cliparse.Parse(cliparse.New(name), args)
+}

internal/chats/facts.go

@@ -3,12 +3,13 @@ package chats
 import (
 	"bufio"
 	"encoding/json"
-	"flag"
 	"fmt"
 	"os"
 	"path/filepath"
 	"regexp"
 	"strings"
+
+	cliparse "github.com/eSlider/2dph/internal/cli"
 )
 
 var (
@@ -76,15 +77,8 @@ type ExtractedFact struct {
 }
 
 func RunFacts(args []string) int {
-	fs := flag.NewFlagSet("chats facts", flag.ContinueOnError)
-	help := fs.Bool("help", false, "")
-	fs.SetOutput(os.Stderr)
-	if err := fs.Parse(args); err != nil {
-		return 2
-	}
-	if *help {
-		fmt.Fprintln(os.Stderr, "usage: chats facts")
-		return 0
+	if err := parseNoFlags("chats-facts", args); err != nil {
+		return cliparse.Fail(err)
 	}
 
 	root := Dir()

internal/chats/import.go

@@ -4,25 +4,19 @@ import (
 	"bufio"
 	"bytes"
 	"encoding/json"
-	"flag"
 	"fmt"
 	"html"
 	"os"
 	"path/filepath"
 	"sort"
 	"strings"
+
+	cliparse "github.com/eSlider/2dph/internal/cli"
 )
 
 func RunImport(args []string) int {
-	fs := flag.NewFlagSet("chats import", flag.ContinueOnError)
-	help := fs.Bool("help", false, "")
-	fs.SetOutput(os.Stderr)
-	if err := fs.Parse(args); err != nil {
-		return 2
-	}
-	if *help {
-		fmt.Fprintln(os.Stderr, "usage: chats import")
-		return 0
+	if err := parseNoFlags("chats-import", args); err != nil {
+		return cliparse.Fail(err)
 	}
 
 	root := Dir()

internal/chats/sync_linkedin.go

@@ -2,12 +2,13 @@ package chats
 
 import (
 	"context"
-	"flag"
 	"fmt"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"time"
+
+	cliparse "github.com/eSlider/2dph/internal/cli"
 )
 
 func checkLinkedInSession(userDataDir string) (bool, error) {
@@ -29,18 +30,12 @@ func checkLinkedInSession(userDataDir string) (bool, error) {
 }
 
 func RunSyncLinkedIn(args []string) int {
-	fs := flag.NewFlagSet("chats sync linkedin", flag.ContinueOnError)
-	limit := fs.Int("limit", 0, "max messages per conversation (0 = all)")
-	refresh := fs.Bool("refresh", false, "refresh session from live webtop browser before sync")
-	help := fs.Bool("help", false, "")
-	fs.SetOutput(os.Stderr)
-	if err := fs.Parse(args); err != nil {
-		return 2
-	}
-	if *help {
-		fmt.Fprintln(os.Stderr, "usage: chats sync linkedin [--limit N] [--refresh]")
-		return 0
+	f, err := parseLinkedInFlags(args)
+	if err != nil {
+		return cliparse.Fail(err)
 	}
+	limit := f.Limit
+	refresh := f.Refresh
 
 	userDataDir := envVar("LINKEDIN_USER_DATA_DIR", "")
 	if userDataDir == "" {
@@ -48,7 +43,7 @@ func RunSyncLinkedIn(args []string) int {
 		userDataDir = home + "/.linkedin-mcp/profile"
 	}
 
-	if *refresh {
+	if refresh {
 		if code := refreshLinkedInSession(userDataDir); code != 0 {
 			return code
 		}
@@ -72,7 +67,7 @@ func RunSyncLinkedIn(args []string) int {
 	defer cancel()
 
 	start := time.Now()
-	if err := src.Sync(ctx, Dir(), *limit); err != nil {
+	if err := src.Sync(ctx, Dir(), limit); err != nil {
 		fmt.Fprintf(os.Stderr, "chats sync linkedin: %v\n", err)
 		return 1
 	}

internal/chats/sync_telegram.go

@@ -2,33 +2,28 @@ package chats
 
 import (
 	"context"
-	"flag"
 	"fmt"
 	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
+
+	cliparse "github.com/eSlider/2dph/internal/cli"
 )
 
 func RunSyncTelegram(args []string) int {
-	fs := flag.NewFlagSet("chats sync telegram", flag.ContinueOnError)
-	limit := fs.Int("limit", 0, "max messages per chat (0 = all)")
-	phone := fs.String("phone", "", "phone number (default env TELEGRAM_PHONE)")
-	help := fs.Bool("help", false, "")
-	fs.SetOutput(os.Stderr)
-	if err := fs.Parse(args); err != nil {
-		return 2
-	}
-	if *help {
-		fmt.Fprintln(os.Stderr, "usage: chats sync telegram [--limit N] [--phone PHONE]")
-		return 0
+	f, err := parseTelegramFlags(args)
+	if err != nil {
+		return cliparse.Fail(err)
 	}
+	limit := f.Limit
+	phone := f.Phone
 
 	apiIDStr := envVar("TELEGRAM_API_ID", "")
 	apiHash := envVar("TELEGRAM_API_HASH", "")
 	sessionStr := envVar("TELEGRAM_SESSION_STRING", "")
-	phoneNum := *phone
+	phoneNum := phone
 	if phoneNum == "" {
 		phoneNum = envVar("TELEGRAM_PHONE", "")
 	}
@@ -78,7 +73,7 @@ func RunSyncTelegram(args []string) int {
 	defer cancel()
 
 	start := time.Now()
-	if err := src.Sync(ctx, Dir(), *limit); err != nil {
+	if err := src.Sync(ctx, Dir(), limit); err != nil {
 		fmt.Fprintf(os.Stderr, "chats sync telegram: %v\n", err)
 		return 1
 	}

internal/cli/cli.go

@@ -0,0 +1,190 @@
+// Package cli is the shared flaggy wrapper (D23).
+//
+// flaggy: zero deps, flags at any position, shell completion scripts.
+// Individual tools keep ShowCompletion off so a query like "completion" is
+// not stolen; dump scripts with bin/cli/complete.go.
+package cli
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"sync"
+
+	"github.com/integrii/flaggy"
+)
+
+// ErrHelp means -h/--help was requested (exit 0).
+var ErrHelp = errors.New("help")
+
+var parseMu sync.Mutex
+
+// New returns a per-call parser. Never reuse: flaggy parses once.
+func New(name string) *flaggy.Parser {
+	p := flaggy.NewParser(name)
+	p.ShowVersionWithVersionFlag = false
+	p.ShowCompletion = false
+	// Extra positionals become TrailingArguments (search "two words --json").
+	// Unknown dash tokens are rejected in Parse after flaggy returns.
+	p.ShowHelpOnUnexpected = false
+	p.ShowHelpWithHFlag = true
+	return p
+}
+
+// Parse runs p.ParseArgs and turns flaggy's os.Exit into an error.
+// Not safe to call in parallel (flaggy.PanicInsteadOfExit is process-global).
+func Parse(p *flaggy.Parser, args []string) error {
+	parseMu.Lock()
+	defer parseMu.Unlock()
+	prev := flaggy.PanicInsteadOfExit
+	flaggy.PanicInsteadOfExit = true
+	defer func() { flaggy.PanicInsteadOfExit = prev }()
+
+	var exitMsg string
+	err := func() error {
+		defer func() {
+			if r := recover(); r != nil {
+				exitMsg = fmt.Sprint(r)
+			}
+		}()
+		return p.ParseArgs(args)
+	}()
+	if err != nil {
+		return err
+	}
+	if exitMsg != "" {
+		if strings.Contains(exitMsg, "code: 0") {
+			return ErrHelp
+		}
+		return errors.New(exitMsg)
+	}
+	if u := unknownFlags(p, args); len(u) > 0 {
+		return fmt.Errorf("unknown flag %q", u[0])
+	}
+	return nil
+}
+
+func unknownFlags(p *flaggy.Parser, args []string) []string {
+	flags := collectFlags(&p.Subcommand)
+	var out []string
+	skipNext := false
+	for _, a := range args {
+		if skipNext {
+			skipNext = false
+			continue
+		}
+		if a == "--" {
+			break
+		}
+		name, inline := flagName(a)
+		if name == "" {
+			continue
+		}
+		if name == "h" || name == "help" {
+			continue
+		}
+		f := findFlag(flags, name)
+		if f == nil {
+			out = append(out, a)
+			continue
+		}
+		if !inline && !isBoolFlag(f) {
+			skipNext = true
+		}
+	}
+	return out
+}
+
+func flagName(a string) (name string, inline bool) {
+	if a == "-" || !strings.HasPrefix(a, "-") {
+		return "", false
+	}
+	rest := strings.TrimLeft(a, "-")
+	name, _, inline = strings.Cut(rest, "=")
+	return name, inline
+}
+
+func collectFlags(sc *flaggy.Subcommand) []*flaggy.Flag {
+	out := append([]*flaggy.Flag{}, sc.Flags...)
+	for _, sub := range sc.Subcommands {
+		out = append(out, collectFlags(sub)...)
+	}
+	return out
+}
+
+func findFlag(flags []*flaggy.Flag, name string) *flaggy.Flag {
+	for _, f := range flags {
+		if f.HasName(name) {
+			return f
+		}
+	}
+	return nil
+}
+
+func isBoolFlag(f *flaggy.Flag) bool {
+	_, ok := f.AssignmentVar.(*bool)
+	return ok
+}
+
+// Query joins the first positional with leftover trailing words.
+func Query(first string, trailing []string) string {
+	parts := make([]string, 0, 1+len(trailing))
+	if s := strings.TrimSpace(first); s != "" {
+		parts = append(parts, s)
+	}
+	for _, t := range trailing {
+		if s := strings.TrimSpace(t); s != "" {
+			parts = append(parts, s)
+		}
+	}
+	return strings.Join(parts, " ")
+}
+
+// Code maps parse errors to process exit codes (0 help, 2 usage).
+func Code(err error) int {
+	if err == nil || errors.Is(err, ErrHelp) {
+		return 0
+	}
+	return 2
+}
+
+// Fail prints err unless it is help or a flaggy exit that already wrote stderr.
+func Fail(err error) int {
+	if err == nil || errors.Is(err, ErrHelp) {
+		return 0
+	}
+	if strings.HasPrefix(err.Error(), "Panic instead of exit") {
+		return 2
+	}
+	fmt.Fprintln(os.Stderr, err)
+	return 2
+}
+
+// Tool is one shebang CLI for completion dump.
+type Tool struct {
+	Path string
+	Name string
+	New  func() *flaggy.Parser
+}
+
+// BashScript concatenates flaggy bash complete scripts and binds each
+// function to the shebang path (./bin/subject/method.go).
+func BashScript(tools []Tool) string {
+	var b strings.Builder
+	b.WriteString("# 2dph flaggy completions (D23). source <(./bin/cli/complete.go bash)\n")
+	for _, t := range tools {
+		p := t.New()
+		p.Name = t.Name
+		script := flaggy.GenerateBashCompletion(p)
+		b.WriteString(script)
+		fn := "_" + strings.ReplaceAll(t.Name, "-", "_") + "_complete"
+		if t.Path != "" && t.Path != t.Name {
+			fmt.Fprintf(&b, "complete -F %s %s\n", fn, t.Path)
+			if !strings.HasPrefix(t.Path, "./") {
+				fmt.Fprintf(&b, "complete -F %s ./%s\n", fn, t.Path)
+			}
+		}
+	}
+	return b.String()
+}

internal/cli/cli_test.go

@@ -0,0 +1,77 @@
+package cli
+
+import (
+	"errors"
+	"strings"
+	"testing"
+
+	"github.com/integrii/flaggy"
+)
+
+func TestParseBoolAndIntAnyPosition(t *testing.T) {
+	p := New("t")
+	jsonOut := false
+	n := 20
+	q := ""
+	p.Bool(&jsonOut, "", "json", "JSON")
+	p.Int(&n, "n", "n", "limit")
+	p.AddPositionalValue(&q, "query", 1, false, "q")
+	if err := Parse(p, []string{"two", "words", "--json", "-n", "5"}); err != nil {
+		t.Fatal(err)
+	}
+	got := Query(q, p.TrailingArguments)
+	if got != "two words" || !jsonOut || n != 5 {
+		t.Fatalf("q=%q json=%v n=%d", got, jsonOut, n)
+	}
+}
+
+func TestParseUnknownFlagIsError(t *testing.T) {
+	p := New("t")
+	jsonOut := false
+	p.Bool(&jsonOut, "", "json", "JSON")
+	if err := Parse(p, []string{"--nope"}); err == nil {
+		t.Fatal("unknown flag accepted")
+	}
+}
+
+func TestParseHelpIsErrHelp(t *testing.T) {
+	p := New("t")
+	jsonOut := false
+	p.Bool(&jsonOut, "", "json", "JSON")
+	err := Parse(p, []string{"--help"})
+	if !errors.Is(err, ErrHelp) {
+		t.Fatalf("got %v", err)
+	}
+}
+
+func TestParseMissingFlagValueIsError(t *testing.T) {
+	p := New("t")
+	n := 0
+	p.Int(&n, "", "hop", "hop")
+	if err := Parse(p, []string{"--hop"}); err == nil {
+		t.Fatal("expected missing value error")
+	}
+}
+
+func TestBashScriptNamesShebangPath(t *testing.T) {
+	out := BashScript([]Tool{{
+		Path: "bin/brain/search.go",
+		Name: "brain-search",
+		New:  newSearchLike,
+	}})
+	if !strings.Contains(out, "--json") || !strings.Contains(out, "--hop") {
+		t.Fatalf("flags missing:\n%s", out)
+	}
+	if !strings.Contains(out, "complete -F") || !strings.Contains(out, "bin/brain/search.go") {
+		t.Fatalf("shebang complete missing:\n%s", out)
+	}
+}
+
+func newSearchLike() *flaggy.Parser {
+	p := New("brain-search")
+	jsonOut := false
+	hop := 0
+	p.Bool(&jsonOut, "", "json", "JSON")
+	p.Int(&hop, "", "hop", "graph hop")
+	return p
+}

internal/cli/qa.go

@@ -0,0 +1,24 @@
+package cli
+
+import "github.com/integrii/flaggy"
+
+type QAStats struct {
+	JSONL string
+}
+
+func QAParser() *flaggy.Parser {
+	c := QAStats{}
+	return BindQA(&c)
+}
+
+func BindQA(c *QAStats) *flaggy.Parser {
+	p := New("qa-stats")
+	p.Description = "DuckDB quantiles / JSONL count"
+	p.String(&c.JSONL, "", "jsonl", "JSONL file (else stdin JSON [float,…])")
+	return p
+}
+
+func ParseQAStats(args []string) (QAStats, error) {
+	var c QAStats
+	return c, Parse(BindQA(&c), args)
+}

internal/gitlog/args.go

@@ -0,0 +1,51 @@
+package gitlog
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type CLI struct {
+	Repo, Root, Since string
+	Limit             int
+	JSONOut           bool
+}
+
+func Parser() *flaggy.Parser {
+	c := CLI{}
+	return Bind(&c)
+}
+
+func Bind(c *CLI) *flaggy.Parser {
+	p := cli.New("git-import")
+	p.Description = "go-git history → commit leafs"
+	p.Bool(&c.JSONOut, "", "json", "JSON output")
+	p.Int(&c.Limit, "", "limit", "max commits (0 = all)")
+	p.String(&c.Since, "", "since", "RFC3339 or YYYY-MM-DD")
+	p.String(&c.Root, "", "root", "scan dir for git repos")
+	p.AddPositionalValue(&c.Repo, "repo", 1, false, "git repo path")
+	return p
+}
+
+func ParseArgs(args []string) (CLI, error) {
+	var c CLI
+	if err := cli.Parse(Bind(&c), args); err != nil {
+		return c, err
+	}
+	return c, nil
+}
+
+func ParseSince(s string) (time.Time, error) {
+	if s == "" {
+		return time.Time{}, nil
+	}
+	for _, layout := range []string{time.RFC3339, "2006-01-02"} {
+		if t, err := time.Parse(layout, s); err == nil {
+			return t, nil
+		}
+	}
+	return time.Time{}, fmt.Errorf("cannot parse --since %q", s)
+}

internal/mdleaves/args.go

@@ -0,0 +1,41 @@
+package mdleaves
+
+import (
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type CLI struct {
+	Root    string
+	Files   string
+	JSONOut bool
+}
+
+func Parser() *flaggy.Parser {
+	c := CLI{Root: "."}
+	return Bind(&c)
+}
+
+func Bind(c *CLI) *flaggy.Parser {
+	if c.Root == "" {
+		c.Root = "."
+	}
+	p := cli.New("markdown-import")
+	p.Description = "split markdown H2 leafs"
+	p.Bool(&c.JSONOut, "", "json", "JSON output")
+	p.String(&c.Files, "", "files", "comma-separated paths")
+	p.AddPositionalValue(&c.Root, "dir", 1, false, "markdown root")
+	return p
+}
+
+func ParseArgs(args []string) (CLI, error) {
+	c := CLI{Root: "."}
+	p := Bind(&c)
+	if err := cli.Parse(p, args); err != nil {
+		return c, err
+	}
+	if extra := cli.Query("", p.TrailingArguments); extra != "" && c.Root == "." {
+		c.Root = extra
+	}
+	return c, nil
+}

internal/ocr/args.go

@@ -0,0 +1,35 @@
+package ocr
+
+import (
+	"fmt"
+
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type CLI struct {
+	Path string
+}
+
+func Parser() *flaggy.Parser {
+	c := CLI{}
+	return Bind(&c)
+}
+
+func Bind(c *CLI) *flaggy.Parser {
+	p := cli.New("mail-ocr")
+	p.Description = "tesseract eng+deu on image or scanned PDF"
+	p.AddPositionalValue(&c.Path, "file", 1, false, "image or pdf")
+	return p
+}
+
+func ParseArgs(args []string) (CLI, error) {
+	var c CLI
+	if err := cli.Parse(Bind(&c), args); err != nil {
+		return c, err
+	}
+	if c.Path == "" {
+		return c, fmt.Errorf("usage: bin/mail/ocr.go <image|pdf>")
+	}
+	return c, nil
+}

internal/reasoner/args.go

@@ -0,0 +1,47 @@
+package reasoner
+
+import (
+	"os"
+
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type CLI struct {
+	Base    string
+	Model   string
+	Device  string
+	JSONOut bool
+}
+
+func Parser() *flaggy.Parser {
+	c := NewCLI()
+	return Bind(&c)
+}
+
+func NewCLI() CLI {
+	base := os.Getenv("REASONER_BASE_URL")
+	if base == "" {
+		base = "http://127.0.0.1:11435/v1"
+	}
+	model := os.Getenv("REASONER_MODEL")
+	if model == "" {
+		model = OllamaRAM
+	}
+	return CLI{Base: base, Model: model, Device: "cpu"}
+}
+
+func Bind(c *CLI) *flaggy.Parser {
+	p := cli.New("reasoner-bakeoff")
+	p.Description = "CPU tool-call bake-off"
+	p.Bool(&c.JSONOut, "", "json", "JSON output")
+	p.String(&c.Model, "", "model", "Ollama/HF model id")
+	p.String(&c.Base, "", "base-url", "OpenAI-compatible URL")
+	p.String(&c.Device, "", "device", "cpu")
+	return p
+}
+
+func ParseArgs(args []string) (CLI, error) {
+	c := NewCLI()
+	return c, cli.Parse(Bind(&c), args)
+}

internal/websearch/args.go

@@ -0,0 +1,63 @@
+package websearch
+
+import (
+	"fmt"
+
+	"github.com/eSlider/2dph/internal/cli"
+	"github.com/integrii/flaggy"
+)
+
+type CLI struct {
+	Query, Site, Lang, Fresh, Category, Engines string
+	Limit                                       int
+	JSONOut, Refresh, Force                     bool
+	TTL                                         float64
+	Timeout                                     int
+}
+
+func NewCLI() CLI {
+	return CLI{Limit: DefaultLimit, TTL: float64(CacheTTL), Timeout: 25}
+}
+
+func Parser() *flaggy.Parser {
+	c := NewCLI()
+	return Bind(&c)
+}
+
+func Bind(c *CLI) *flaggy.Parser {
+	p := cli.New("web-search")
+	p.Description = "SearXNG second source (throttled ≠ absence)"
+	p.Bool(&c.JSONOut, "", "json", "JSON output")
+	p.Bool(&c.Refresh, "", "refresh", "bypass cache")
+	p.Bool(&c.Force, "", "force", "allow PII in query")
+	p.Int(&c.Limit, "n", "limit", "max hits")
+	p.String(&c.Site, "", "site", "restrict to host")
+	p.String(&c.Lang, "", "lang", "language")
+	p.String(&c.Fresh, "", "fresh", "day|week|month|year")
+	p.String(&c.Category, "", "category", "searx category")
+	p.String(&c.Engines, "", "engines", "engine list")
+	p.Float64(&c.TTL, "", "ttl", "cache ttl seconds")
+	p.Int(&c.Timeout, "", "timeout", "http timeout seconds")
+	return p
+}
+
+func ParseArgs(args []string) (CLI, error) {
+	c := NewCLI()
+	p := Bind(&c)
+	var q string
+	p.AddPositionalValue(&q, "query", 1, false, "search query")
+	if err := cli.Parse(p, args); err != nil {
+		return c, err
+	}
+	c.Query = cli.Query(q, p.TrailingArguments)
+	if c.Query == "" {
+		return c, fmt.Errorf("query required")
+	}
+	if c.Limit < 0 {
+		return c, fmt.Errorf("--limit must be a non-negative integer")
+	}
+	if c.Timeout <= 0 {
+		return c, fmt.Errorf("--timeout must be a positive integer")
+	}
+	return c, nil
+}