Safer agent hook parsing, make sure we preserve unknown hook types

[Soph]

Fixes #308

The agent settings parsing was too strict and removed any hook types that weren't defined / known in the CLI repo. This handles this safer and prevents removing hook types the CLI doesn't know about.

[Copilot]

Pull request overview

This PR fixes issue #308 where entire enable was silently dropping unknown Claude Code hook types (e.g., PreCompact, Notification, SubagentStop) from agent settings files. The root cause was that the CLI unmarshaled hooks into a struct with only known fields, causing Go's JSON unmarshaler to silently discard unknown fields. The fix uses map[string]json.RawMessage to preserve all hook types while only parsing and modifying the specific hooks that Entire needs.

Changes:

• Refactored hook parsing to use map[string]json.RawMessage for forward compatibility
• Added shared test utilities for hook verification
• Enhanced test coverage for unknown hook type preservation
• Applied fix consistently to both Claude Code and Gemini CLI agents

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cmd/entire/cli/agent/testutil/hooks.go	New shared test utility package for reading raw hooks and extracting keys from JSON maps
cmd/entire/cli/agent/claudecode/hooks.go	Refactored InstallHooks and UninstallHooks to use map[string]json.RawMessage for preserving unknown hook types; added parseHookType and marshalHookType helpers
cmd/entire/cli/agent/claudecode/hooks_test.go	Added comprehensive tests for unknown hook type preservation during install/uninstall; refactored to use shared testutil functions; renamed containsDenyRule to containsRule for clarity
cmd/entire/cli/agent/geminicli/hooks.go	Refactored InstallHooks and UninstallHooks to use map[string]json.RawMessage for preserving unknown hook types; added parseGeminiHookType and marshalGeminiHookType helpers
cmd/entire/cli/agent/geminicli/hooks_test.go	Added comprehensive tests for unknown hook type preservation during install/uninstall; added tests for preserving user hooks on same hook types
cmd/entire/cli/integration_test/hooks_test.go	Fixed formatting (indentation) of import statement

[toothbrush]

Looks reasonable to me. I wonder if this kind of logic can/should be extracted out of the individual Gemini & Claude hook definitions, so that it'll be easier to reuse for the N+1st agent we add? Something we might want to bear in mind.

[Soph]

@toothbrush yes, it should. I also thought about this, but given we are having an agent refactor coming up I decided to leave it like that for now.