feat(hooks): add hook registry and install command (bd-qj9nc)

- Add hooks_registry.go: LoadRegistry(), HookRegistry/HookDefinition types
- Add hooks_install.go: gt hooks install command with --role and --all-rigs flags
- gt hooks list now reads from ~/gt/hooks/registry.toml
- Supports dry-run, deduplication, and creates .claude dirs as needed

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
beads/crew/lizzy
2026-01-21 17:40:05 -08:00
committed by beads/crew/emma
parent 6616a4726c
commit d0e49a216a
2 changed files with 432 additions and 0 deletions

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package cmd
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/spf13/cobra"
"github.com/steveyegge/gastown/internal/style"
"github.com/steveyegge/gastown/internal/workspace"
)
var (
installRole string
installAllRigs bool
installDryRun bool
)
var hooksInstallCmd = &cobra.Command{
Use: "install <hook-name>",
Short: "Install a hook from the registry",
Long: `Install a hook from the registry to worktrees.
By default, installs to the current worktree. Use --role to install
to all worktrees of a specific role in the current rig.
Examples:
gt hooks install pr-workflow-guard # Install to current worktree
gt hooks install pr-workflow-guard --role crew # Install to all crew in current rig
gt hooks install session-prime --role crew --all-rigs # Install to all crew everywhere
gt hooks install pr-workflow-guard --dry-run # Preview what would be installed`,
Args: cobra.ExactArgs(1),
RunE: runHooksInstall,
}
func init() {
hooksCmd.AddCommand(hooksInstallCmd)
hooksInstallCmd.Flags().StringVar(&installRole, "role", "", "Install to all worktrees of this role (crew, polecat, witness, refinery)")
hooksInstallCmd.Flags().BoolVar(&installAllRigs, "all-rigs", false, "Install across all rigs (requires --role)")
hooksInstallCmd.Flags().BoolVar(&installDryRun, "dry-run", false, "Preview changes without writing files")
}
func runHooksInstall(cmd *cobra.Command, args []string) error {
hookName := args[0]
townRoot, err := workspace.FindFromCwd()
if err != nil {
return fmt.Errorf("not in a Gas Town workspace: %w", err)
}
// Load registry
registry, err := LoadRegistry(townRoot)
if err != nil {
return err
}
// Find the hook
hookDef, ok := registry.Hooks[hookName]
if !ok {
return fmt.Errorf("hook %q not found in registry", hookName)
}
if !hookDef.Enabled {
fmt.Printf("%s Hook %q is disabled in registry. Use --force to install anyway.\n",
style.Warning.Render("Warning:"), hookName)
}
// Determine target worktrees
targets, err := determineTargets(townRoot, installRole, installAllRigs, hookDef.Roles)
if err != nil {
return err
}
if len(targets) == 0 {
// No role specified, install to current worktree
cwd, err := os.Getwd()
if err != nil {
return err
}
targets = []string{cwd}
}
// Install to each target
installed := 0
for _, target := range targets {
if err := installHookTo(target, hookName, hookDef, installDryRun); err != nil {
fmt.Printf("%s Failed to install to %s: %v\n", style.Error.Render("Error:"), target, err)
continue
}
installed++
}
if installDryRun {
fmt.Printf("\n%s Would install %q to %d worktree(s)\n", style.Dim.Render("Dry run:"), hookName, installed)
} else {
fmt.Printf("\n%s Installed %q to %d worktree(s)\n", style.Success.Render("Done:"), hookName, installed)
}
return nil
}
// determineTargets finds all worktree paths matching the role criteria.
func determineTargets(townRoot, role string, allRigs bool, allowedRoles []string) ([]string, error) {
if role == "" {
return nil, nil // Will use current directory
}
// Check if role is allowed for this hook
roleAllowed := false
for _, r := range allowedRoles {
if r == role {
roleAllowed = true
break
}
}
if !roleAllowed {
return nil, fmt.Errorf("hook is not applicable to role %q (allowed: %s)", role, strings.Join(allowedRoles, ", "))
}
var targets []string
// Find rigs to scan
var rigs []string
if allRigs {
entries, err := os.ReadDir(townRoot)
if err != nil {
return nil, err
}
for _, e := range entries {
if e.IsDir() && !strings.HasPrefix(e.Name(), ".") && e.Name() != "mayor" && e.Name() != "deacon" && e.Name() != "hooks" {
rigs = append(rigs, e.Name())
}
}
} else {
// Find current rig from cwd
cwd, err := os.Getwd()
if err != nil {
return nil, err
}
relPath, err := filepath.Rel(townRoot, cwd)
if err != nil {
return nil, err
}
parts := strings.Split(relPath, string(filepath.Separator))
if len(parts) > 0 {
rigs = []string{parts[0]}
}
}
// Find worktrees for the role in each rig
for _, rig := range rigs {
rigPath := filepath.Join(townRoot, rig)
switch role {
case "crew":
crewDir := filepath.Join(rigPath, "crew")
if entries, err := os.ReadDir(crewDir); err == nil {
for _, e := range entries {
if e.IsDir() && !strings.HasPrefix(e.Name(), ".") {
targets = append(targets, filepath.Join(crewDir, e.Name()))
}
}
}
case "polecat":
polecatsDir := filepath.Join(rigPath, "polecats")
if entries, err := os.ReadDir(polecatsDir); err == nil {
for _, e := range entries {
if e.IsDir() && !strings.HasPrefix(e.Name(), ".") {
targets = append(targets, filepath.Join(polecatsDir, e.Name()))
}
}
}
case "witness":
witnessPath := filepath.Join(rigPath, "witness")
if _, err := os.Stat(witnessPath); err == nil {
targets = append(targets, witnessPath)
}
case "refinery":
refineryPath := filepath.Join(rigPath, "refinery")
if _, err := os.Stat(refineryPath); err == nil {
targets = append(targets, refineryPath)
}
}
}
return targets, nil
}
// installHookTo installs a hook to a specific worktree.
func installHookTo(worktreePath, hookName string, hookDef HookDefinition, dryRun bool) error {
settingsPath := filepath.Join(worktreePath, ".claude", "settings.json")
// Load existing settings or create new
var settings ClaudeSettings
if data, err := os.ReadFile(settingsPath); err == nil {
if err := json.Unmarshal(data, &settings); err != nil {
return fmt.Errorf("parsing existing settings: %w", err)
}
}
// Initialize maps if needed
if settings.Hooks == nil {
settings.Hooks = make(map[string][]ClaudeHookMatcher)
}
if settings.EnabledPlugins == nil {
settings.EnabledPlugins = make(map[string]bool)
}
// Build the hook entries
for _, matcher := range hookDef.Matchers {
hookEntry := ClaudeHookMatcher{
Matcher: matcher,
Hooks: []ClaudeHook{
{Type: "command", Command: hookDef.Command},
},
}
// Check if this exact matcher already exists
exists := false
for _, existing := range settings.Hooks[hookDef.Event] {
if existing.Matcher == matcher {
exists = true
break
}
}
if !exists {
settings.Hooks[hookDef.Event] = append(settings.Hooks[hookDef.Event], hookEntry)
}
}
// Ensure beads plugin is disabled (standard for Gas Town)
settings.EnabledPlugins["beads@beads-marketplace"] = false
// Pretty print relative path
relPath := worktreePath
if home, err := os.UserHomeDir(); err == nil {
if rel, err := filepath.Rel(home, worktreePath); err == nil && !strings.HasPrefix(rel, "..") {
relPath = "~/" + rel
}
}
if dryRun {
fmt.Printf(" %s %s\n", style.Dim.Render("Would install to:"), relPath)
return nil
}
// Create directory if needed
if err := os.MkdirAll(filepath.Dir(settingsPath), 0755); err != nil {
return fmt.Errorf("creating .claude directory: %w", err)
}
// Write settings
data, err := json.MarshalIndent(settings, "", " ")
if err != nil {
return fmt.Errorf("marshaling settings: %w", err)
}
if err := os.WriteFile(settingsPath, data, 0600); err != nil {
return fmt.Errorf("writing settings: %w", err)
}
fmt.Printf(" %s %s\n", style.Success.Render("Installed to:"), relPath)
return nil
}

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package cmd
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/BurntSushi/toml"
"github.com/spf13/cobra"
"github.com/steveyegge/gastown/internal/style"
"github.com/steveyegge/gastown/internal/workspace"
)
// HookRegistry represents the hooks/registry.toml structure.
type HookRegistry struct {
Hooks map[string]HookDefinition `toml:"hooks"`
}
// HookDefinition represents a single hook definition in the registry.
type HookDefinition struct {
Description string `toml:"description"`
Event string `toml:"event"`
Matchers []string `toml:"matchers"`
Command string `toml:"command"`
Roles []string `toml:"roles"`
Scope string `toml:"scope"`
Enabled bool `toml:"enabled"`
}
var (
hooksListAll bool
)
var hooksListCmd = &cobra.Command{
Use: "list",
Short: "List available hooks from the registry",
Long: `List all hooks defined in the hook registry.
The registry is at ~/gt/hooks/registry.toml and defines hooks that can be
installed for different roles (crew, polecat, witness, etc.).
Examples:
gt hooks list # Show enabled hooks
gt hooks list --all # Show all hooks including disabled`,
RunE: runHooksList,
}
func init() {
hooksCmd.AddCommand(hooksListCmd)
hooksListCmd.Flags().BoolVarP(&hooksListAll, "all", "a", false, "Show all hooks including disabled")
hooksListCmd.Flags().BoolVarP(&hooksVerbose, "verbose", "v", false, "Show hook commands and matchers")
}
// LoadRegistry loads the hook registry from the town's hooks directory.
func LoadRegistry(townRoot string) (*HookRegistry, error) {
registryPath := filepath.Join(townRoot, "hooks", "registry.toml")
data, err := os.ReadFile(registryPath)
if err != nil {
if os.IsNotExist(err) {
return nil, fmt.Errorf("hook registry not found at %s", registryPath)
}
return nil, fmt.Errorf("reading registry: %w", err)
}
var registry HookRegistry
if _, err := toml.Decode(string(data), &registry); err != nil {
return nil, fmt.Errorf("parsing registry: %w", err)
}
return &registry, nil
}
func runHooksList(cmd *cobra.Command, args []string) error {
townRoot, err := workspace.FindFromCwd()
if err != nil {
return fmt.Errorf("not in a Gas Town workspace: %w", err)
}
registry, err := LoadRegistry(townRoot)
if err != nil {
return err
}
if len(registry.Hooks) == 0 {
fmt.Println(style.Dim.Render("No hooks defined in registry"))
return nil
}
fmt.Printf("\n%s Hook Registry\n", style.Bold.Render("📋"))
fmt.Printf("Source: %s\n\n", style.Dim.Render(filepath.Join(townRoot, "hooks", "registry.toml")))
// Group by event type
byEvent := make(map[string][]struct {
name string
def HookDefinition
})
eventOrder := []string{"PreToolUse", "PostToolUse", "SessionStart", "PreCompact", "UserPromptSubmit", "Stop"}
for name, def := range registry.Hooks {
if !hooksListAll && !def.Enabled {
continue
}
byEvent[def.Event] = append(byEvent[def.Event], struct {
name string
def HookDefinition
}{name, def})
}
// Add any events not in the predefined order
for event := range byEvent {
found := false
for _, o := range eventOrder {
if event == o {
found = true
break
}
}
if !found {
eventOrder = append(eventOrder, event)
}
}
count := 0
for _, event := range eventOrder {
hooks := byEvent[event]
if len(hooks) == 0 {
continue
}
fmt.Printf("%s %s\n", style.Bold.Render("▸"), event)
for _, h := range hooks {
count++
statusIcon := "●"
statusColor := style.Success
if !h.def.Enabled {
statusIcon = "○"
statusColor = style.Dim
}
rolesStr := strings.Join(h.def.Roles, ", ")
scopeStr := h.def.Scope
fmt.Printf(" %s %s\n", statusColor.Render(statusIcon), style.Bold.Render(h.name))
fmt.Printf(" %s\n", h.def.Description)
fmt.Printf(" %s %s %s %s\n",
style.Dim.Render("roles:"), rolesStr,
style.Dim.Render("scope:"), scopeStr)
if hooksVerbose {
fmt.Printf(" %s %s\n", style.Dim.Render("command:"), h.def.Command)
for _, m := range h.def.Matchers {
fmt.Printf(" %s %s\n", style.Dim.Render("matcher:"), m)
}
}
}
fmt.Println()
}
fmt.Printf("%s %d hooks in registry\n", style.Dim.Render("Total:"), count)
return nil
}