Move HookNames and ParseHookEvent to HookSupport interface

cmd/entire/cli/agent/agent.go

@@ -11,12 +11,10 @@ import (
 // Each agent implementation (Claude Code, Cursor, Aider, etc.) converts its
 // native format to the normalized types defined in this package.
 //
-// The interface is organized into four groups:
-//
+// The interface is organized into three groups:
 //   - Identity (5 methods): Name, Type, Description, DetectPresence, ProtectedDirs
-//   - Event Mapping (2 methods): HookNames, ParseHookEvent
 //   - Transcript Storage (3 methods): ReadTranscript, ChunkTranscript, ReassembleTranscript
-//   - Legacy (8 methods): Will be moved to optional interfaces or removed in a future phase
+//   - Legacy (6 methods): Will be moved to optional interfaces or removed in a future phase
 type Agent interface {
 	// --- Identity ---
 
@@ -41,18 +39,6 @@ type Agent interface {
 	// Examples: [".claude"] for Claude, [".gemini"] for Gemini.
 	ProtectedDirs() []string
 
-	// --- Event Mapping ---
-
-	// HookNames returns the hook verbs this agent supports.
-	// These become subcommands under `entire hooks <agent>`.
-	// e.g., ["stop", "user-prompt-submit", "session-start", "session-end"]
-	HookNames() []string
-
-	// ParseHookEvent translates an agent-native hook into a normalized lifecycle Event.
-	// Returns nil if the hook has no lifecycle significance (e.g., pass-through hooks).
-	// This is the core contribution surface for new agent implementations.
-	ParseHookEvent(hookName string, stdin io.Reader) (*Event, error)
-
 	// --- Transcript Storage ---
 
 	// ReadTranscript reads the raw transcript bytes for a session.
@@ -91,9 +77,23 @@ type Agent interface {
 // HookSupport is implemented by agents with lifecycle hooks.
 // This optional interface allows agents like Claude Code and Cursor to
 // install and manage hooks that notify Entire of agent events.
+//
+// The interface is organized into two groups:
+//   - Hook Mapping (2 methods): HookNames, ParseHookEvent
+//   - Hook Management (3 methods): InstallHooks, UninstallHooks, AreHooksInstalled
 type HookSupport interface {
 	Agent
 
+	// HookNames returns the hook verbs this agent supports.
+	// These become subcommands under `entire hooks <agent>`.
+	// e.g., ["stop", "user-prompt-submit", "session-start", "session-end"]
+	HookNames() []string
+
+	// ParseHookEvent translates an agent-native hook into a normalized lifecycle Event.
+	// Returns nil if the hook has no lifecycle significance (e.g., pass-through hooks).
+	// This is the core contribution surface for new agent implementations.
+	ParseHookEvent(hookName string, stdin io.Reader) (*Event, error)
+
 	// InstallHooks installs agent-specific hooks.
 	// If localDev is true, hooks point to local development build.
 	// If force is true, removes existing Entire hooks before installing.

cmd/entire/cli/agent/agent_test.go

@@ -21,11 +21,8 @@ func (m *mockAgent) DetectPresence() (bool, error) { return false, nil }
 
 func (m *mockAgent) GetSessionID(_ *HookInput) string { return "" }
 func (m *mockAgent) ProtectedDirs() []string          { return nil }
-func (m *mockAgent) HookNames() []string              { return nil }
 
-//nolint:nilnil // Mock implementation
-func (m *mockAgent) ParseHookEvent(_ string, _ io.Reader) (*Event, error) { return nil, nil }
-func (m *mockAgent) ReadTranscript(_ string) ([]byte, error)              { return nil, nil }
+func (m *mockAgent) ReadTranscript(_ string) ([]byte, error) { return nil, nil }
 func (m *mockAgent) ChunkTranscript(content []byte, _ int) ([][]byte, error) {
 	return [][]byte{content}, nil
 }
@@ -53,9 +50,13 @@ type mockHookSupport struct {
 
 var _ HookSupport = (*mockHookSupport)(nil) // Compile-time interface check
 
-func (m *mockHookSupport) InstallHooks(_, _ bool) (int, error) { return 0, nil }
-func (m *mockHookSupport) UninstallHooks() error               { return nil }
-func (m *mockHookSupport) AreHooksInstalled() bool             { return false }
+func (m *mockHookSupport) HookNames() []string { return nil }
+
+//nolint:nilnil // Mock implementation
+func (m *mockHookSupport) ParseHookEvent(_ string, _ io.Reader) (*Event, error) { return nil, nil }
+func (m *mockHookSupport) InstallHooks(_, _ bool) (int, error)                  { return 0, nil }
+func (m *mockHookSupport) UninstallHooks() error                                { return nil }
+func (m *mockHookSupport) AreHooksInstalled() bool                              { return false }
 
 // mockFileWatcher implements both Agent and FileWatcher interfaces.
 type mockFileWatcher struct {

cmd/entire/cli/hook_registry.go

@@ -44,9 +44,9 @@ func GetCurrentHookAgent() (agent.Agent, error) {
 	return ag, nil
 }
 
-// newAgentHooksCmd creates a hooks subcommand for an agent.
+// newAgentHooksCmd creates a hooks subcommand for an agent that implements HookSupport.
 // It dynamically creates subcommands for each hook the agent supports.
-func newAgentHooksCmd(agentName agent.AgentName, handler agent.Agent) *cobra.Command {
+func newAgentHooksCmd(agentName agent.AgentName, handler agent.HookSupport) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:    string(agentName),
 		Short:  handler.Description() + " hook handlers",
@@ -132,8 +132,13 @@ func newAgentHookVerbCmdWithLogging(agentName agent.AgentName, hookName string)
 				return fmt.Errorf("failed to get agent %q: %w", agentName, agentErr)
 			}
 
+			handler, ok := ag.(agent.HookSupport)
+			if !ok {
+				return fmt.Errorf("agent %q does not support hooks", agentName)
+			}
+
 			// Use cmd.InOrStdin() to support testing with cmd.SetIn()
-			event, parseErr := ag.ParseHookEvent(hookName, cmd.InOrStdin())
+			event, parseErr := handler.ParseHookEvent(hookName, cmd.InOrStdin())
 			if parseErr != nil {
 				return fmt.Errorf("failed to parse hook event: %w", parseErr)
 			}

cmd/entire/cli/hooks_cmd.go

@@ -22,12 +22,15 @@ func newHooksCmd() *cobra.Command {
 	cmd.AddCommand(newHooksGitCmd())
 
 	// Dynamically add agent hook subcommands
+	// Each agent that implements HookSupport gets its own subcommand tree
 	for _, agentName := range agent.List() {
 		ag, err := agent.Get(agentName)
 		if err != nil {
 			continue
 		}
-		cmd.AddCommand(newAgentHooksCmd(agentName, ag))
+		if handler, ok := ag.(agent.HookSupport); ok {
+			cmd.AddCommand(newAgentHooksCmd(agentName, handler))
+		}
 	}
 
 	return cmd

cmd/entire/cli/lifecycle_test.go

@@ -2,7 +2,6 @@ package cli
 
 import (
 	"errors"
-	"io"
 	"os"
 	"path/filepath"
 	"strings"
@@ -32,14 +31,8 @@ func (m *mockLifecycleAgent) Description() string                    { return "M
 func (m *mockLifecycleAgent) IsPreview() bool                        { return false }
 func (m *mockLifecycleAgent) DetectPresence() (bool, error)          { return false, nil }
 func (m *mockLifecycleAgent) ProtectedDirs() []string                { return nil }
-func (m *mockLifecycleAgent) HookNames() []string                    { return nil }
 func (m *mockLifecycleAgent) GetSessionID(_ *agent.HookInput) string { return "" }
 
-//nolint:nilnil // Mock implementation
-func (m *mockLifecycleAgent) ParseHookEvent(_ string, _ io.Reader) (*agent.Event, error) {
-	return nil, nil
-}
-
 func (m *mockLifecycleAgent) ReadTranscript(_ string) ([]byte, error) {
 	if m.transcriptErr != nil {
 		return nil, m.transcriptErr