feat: Add hookify plugin for custom hook rules via markdown

Adds the hookify plugin to public marketplace. Enables users to create custom
hooks using simple markdown configuration files instead of editing JSON.

Key features:
- Define rules with regex patterns to warn/block operations
- Create rules from explicit instructions or conversation analysis
- Pattern-based matching for bash commands, file edits, prompts, stop events
- Enable/disable rules dynamically without editing code
- Conversation analyzer agent finds problematic behaviors

Changes from internal version:
- Removed non-functional SessionStart hook (not registered in hooks.json)
- Removed all sessionstart documentation and examples
- Fixed restart documentation to consistently state "no restart needed"
- Changed license from "Internal Anthropic use only" to "MIT License"
- Kept test blocks in core modules (useful for developers)

Plugin provides:
- 4 commands: /hookify, /hookify:list, /hookify:configure, /hookify:help
- 1 agent: conversation-analyzer
- 1 skill: writing-rules
- 4 hook types: PreToolUse, PostToolUse, Stop, UserPromptSubmit
- 4 example rules ready to use

All features functional and suitable for public use.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

plugins/hookify/commands/configure.md

@@ -0,0 +1,128 @@
+---
+description: Enable or disable hookify rules interactively
+allowed-tools: ["Glob", "Read", "Edit", "AskUserQuestion", "Skill"]
+---
+
+# Configure Hookify Rules
+
+**Load hookify:writing-rules skill first** to understand rule format.
+
+Enable or disable existing hookify rules using an interactive interface.
+
+## Steps
+
+### 1. Find Existing Rules
+
+Use Glob tool to find all hookify rule files:
+```
+pattern: ".claude/hookify.*.local.md"
+```
+
+If no rules found, inform user:
+```
+No hookify rules configured yet. Use `/hookify` to create your first rule.
+```
+
+### 2. Read Current State
+
+For each rule file:
+- Read the file
+- Extract `name` and `enabled` fields from frontmatter
+- Build list of rules with current state
+
+### 3. Ask User Which Rules to Toggle
+
+Use AskUserQuestion to let user select rules:
+
+```json
+{
+  "questions": [
+    {
+      "question": "Which rules would you like to enable or disable?",
+      "header": "Configure",
+      "multiSelect": true,
+      "options": [
+        {
+          "label": "warn-dangerous-rm (currently enabled)",
+          "description": "Warns about rm -rf commands"
+        },
+        {
+          "label": "warn-console-log (currently disabled)",
+          "description": "Warns about console.log in code"
+        },
+        {
+          "label": "require-tests (currently enabled)",
+          "description": "Requires tests before stopping"
+        }
+      ]
+    }
+  ]
+}
+```
+
+**Option format:**
+- Label: `{rule-name} (currently {enabled|disabled})`
+- Description: Brief description from rule's message or pattern
+
+### 4. Parse User Selection
+
+For each selected rule:
+- Determine current state from label (enabled/disabled)
+- Toggle state: enabled → disabled, disabled → enabled
+
+### 5. Update Rule Files
+
+For each rule to toggle:
+- Use Read tool to read current content
+- Use Edit tool to change `enabled: true` to `enabled: false` (or vice versa)
+- Handle both with and without quotes
+
+**Edit pattern for enabling:**
+```
+old_string: "enabled: false"
+new_string: "enabled: true"
+```
+
+**Edit pattern for disabling:**
+```
+old_string: "enabled: true"
+new_string: "enabled: false"
+```
+
+### 6. Confirm Changes
+
+Show user what was changed:
+
+```
+## Hookify Rules Updated
+
+**Enabled:**
+- warn-console-log
+
+**Disabled:**
+- warn-dangerous-rm
+
+**Unchanged:**
+- require-tests
+
+Changes apply immediately - no restart needed
+```
+
+## Important Notes
+
+- Changes take effect immediately on next tool use
+- You can also manually edit .claude/hookify.*.local.md files
+- To permanently remove a rule, delete its .local.md file
+- Use `/hookify:list` to see all configured rules
+
+## Edge Cases
+
+**No rules to configure:**
+- Show message about using `/hookify` to create rules first
+
+**User selects no rules:**
+- Inform that no changes were made
+
+**File read/write errors:**
+- Inform user of specific error
+- Suggest manual editing as fallback