Move HookNames and ParseHookEvent to HookSupport interface

[squishykid]

Summary

• Moves HookNames() from Agent to HookSupport interface — only relevant for agents with hooks
• Moves ParseHookEvent() from Agent to HookSupport interface — keeps hook-related methods together
• Updates call sites in hooks_cmd.go and hook_registry.go to use HookSupport type assertions
• Narrows the core Agent interface to exclude hook-specific concerns

Stacked on #428

🤖 Generated with Claude Code

[cursor]

PR Summary

Medium Risk
This is an interface refactor that can break compilation or hook execution for any agent implementations/callers not updated to satisfy HookSupport or to type-assert it correctly.

Overview
Narrows the core agent.Agent interface by removing hook-specific methods (HookNames, ParseHookEvent) and making them part of the optional agent.HookSupport interface instead.

Updates hook command registration and dispatch to only create entire hooks <agent> subcommands for agents that implement HookSupport, and to type-assert HookSupport before parsing hook stdin into lifecycle events. Test mocks are adjusted to reflect the new interface split.

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[Copilot]

Pull request overview

This PR narrows the core agent.Agent interface by moving hook-specific APIs (HookNames() and ParseHookEvent()) onto the optional agent.HookSupport interface, and updates hook command registration/execution to use HookSupport assertions.

Changes:

• Removed HookNames() / ParseHookEvent() from agent.Agent and added them to agent.HookSupport.
• Updated hook command wiring (hooks_cmd.go, hook_registry.go) to only register/execute agent hook commands for agents implementing HookSupport.
• Updated mocks/tests to reflect the slimmer Agent interface and the expanded HookSupport interface.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
cmd/entire/cli/agent/agent.go	Moves hook-related methods from Agent to HookSupport to keep Agent focused.
cmd/entire/cli/hooks_cmd.go	Only adds hook subcommands for agents that implement HookSupport.
cmd/entire/cli/hook_registry.go	Changes newAgentHooksCmd to accept HookSupport and asserts HookSupport before parsing hook input.
cmd/entire/cli/agent/agent_test.go	Adjusts mock implementations to match new interface boundaries.
cmd/entire/cli/lifecycle_test.go	Removes now-unneeded hook-related mock methods/imports from lifecycle tests.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.