add grok stuff

agents/.grok/AGENTS.md

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+# Global agent rules
+
+Project-specific rules live in `.grok/rules/`.

agents/.grok/config.toml

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+[hints]
+worktree_tip_dismissed = true
+
+[cli]
+installer = "internal"
+
+[marketplace]
+official_marketplace_auto_installed = true
+
+[[marketplace.sources]]
+name = "xAI Official"
+git = "https://github.com/xai-org/plugin-marketplace.git"
+
+[ui]
+max_thoughts_width = 120
+fork_secondary_model = "grok-build"
+yolo = false
+compact_mode = false
+permission_mode = "always-approve"
+
+[skills]
+paths = ["~/.dotfiles/agents/.grok/.skills"]

agents/.grok/rules/american-english.md

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+# American English
+
+Use American English for all generated text and code, including:
+
+- User-facing messages, comments, documentation, and commit messages
+- String literals, log messages, error text, and UI copy in code
+- Variable and identifier names only when they are natural-language words (e.g. prefer `color` over `colour`, `initialize` over `initialise`)
+
+British or other regional spellings are acceptable only when required by an existing API, library, protocol, or quoted external text.