feat(claude): add initial dotfiles

claude/CLAUDE.md

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+# Global CLAUDE.md
+
+## Comments
+
+Comments must be one of two forms:
+
+```
+# descriptive but non-verbose comment
+# KEYWORD:(@janezicmatej) descriptive but non-verbose comment
+```
+
+Rules:
+- always lowercase
+- no trailing punctuation
+- keywords: WARN, FIX, NOTE, TODO, PERF, TEST, HACK
+- keyword comments must include attribution `(@janezicmatej)`
+
+## Git
+- all git work MUST happen in sub-agents with `isolation: "worktree"`
+- agents MUST commit with `--no-gpg-sign`
+
+## Workflow
+- implement changes directly; don't use sub-agents/Task for simple operations like renames, file moves, or single-file edits; only use Task for genuinely complex parallel exploration or research
+- when redirected or interrupted, immediately stop the current approach and follow the new direction; don't explain or defend the previous approach
+- focus on one goal per session; don't drift into unrelated improvements
+- use Task agents for research and exploration, not for straightforward implementation
+
+## Scope
+- NEVER modify anything outside the scope of what was asked
+- don't introduce unrelated changes, touch unrelated configs, or change defaults not mentioned
+- if something related should change, ask first
+
+## Config locations
+- MCP server configs go in `.claude.json` (project) or `~/.claude.json` (global), not `settings.json`
+- `settings.json` is for permissions, hooks, and behavior settings
+
+## Code quality
+- after making changes, check if the project has linters/formatters and run them