Add repo scaffolding: .gitignore, CLAUDE.md, settings.json

.gitignore

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+# Claude agent memory (project-scoped, committed per-project — not here)
+# Uncomment if you want to exclude agent memory from this repo:
+# .claude/agent-memory/
+
+# Local settings overrides
+settings.local.json
+
+# OS noise
+.DS_Store
+Thumbs.db

CLAUDE.md

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+# Global Claude Code Instructions
+
+## Session Behavior
+- Treat each session as stateless — do not assume context from prior sessions
+- The CLAUDE.md hierarchy is the only source of persistent context
+- If something needs to carry forward across sessions, it belongs in a CLAUDE.md file, not in session memory
+
+
+## Commits & Git Workflow
+- Make many small, tightly scoped commits — one logical change per commit
+- Commit messages should be concise and imperative ("Add X", "Fix Y", "Remove Z")
+- Ask before pushing to remote or force-pushing
+- Ask before opening PRs unless explicitly told to
+
+## Responses & Explanations
+- Be concise — lead with the action or answer, not the preamble
+- Include just enough reasoning to explain *why* a decision was made, not a full walkthrough
+- Skip trailing summaries ("Here's what I did...") — the diff speaks for itself
+- No emojis unless explicitly asked
+
+## Tool & Approach Philosophy
+- Prefer tools and solutions that are declarative and reproducible over imperative one-offs
+- Portability across dev environments is a first-class concern — avoid hardcoding machine-specific paths or assumptions
+- The right tool for the job is the right tool — no language/framework bias, but favor things that can be version-pinned and reproduced
+
+## Parallelism
+- Always parallelize independent work — tool calls, subagents, file reads, searches
+- When a task has components that don't depend on each other, run them concurrently by default
+- Spin up subagents for distinct workstreams (audits, refactors, tests, docs) rather than working sequentially
+- Subagents should always use the Sonnet model for best speed and token efficiency
+- Sequential execution should be the exception, not the default
+
+## Verification
+- After making changes, run relevant tests or build commands to verify correctness before reporting success
+- If no tests exist for the changed code, say so rather than silently assuming it works
+- Prefer running single targeted tests over the full suite unless asked otherwise
+
+## Context Management
+- Use subagents for exploratory reads and investigations to keep the main context clean
+- Prefer scoped file reads (offset/limit) over reading entire large files
+- When a task is complete or the topic shifts significantly, suggest /clear
+
+## When Things Go Wrong
+- If an approach fails twice, stop and reassess rather than continuing to iterate
+- Present the failure clearly and propose an alternative before proceeding
+
+## Research Before Acting
+- Before implementing a solution, research it — read relevant documentation, search for existing patterns, check official sources
+- Do not reason from first principles when documentation or prior art exists
+- Prefer verified answers over confident guesses

settings.json

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+{
+  "permissions": {
+    "allow": [
+      "Bash",
+      "Read",
+      "Edit",
+      "Write",
+      "Glob",
+      "Grep",
+      "WebFetch",
+      "WebSearch"
+    ],
+    "ask": [
+      "Bash(rm *)",
+      "Bash(rmdir *)",
+      "Bash(git push --force*)",
+      "Bash(git push -f *)",
+      "Bash(git reset --hard*)",
+      "Bash(git clean *)",
+      "Bash(chmod *)",
+      "Bash(dd *)",
+      "Bash(mkfs*)",
+      "Bash(shred *)",
+      "Bash(kill *)",
+      "Bash(killall *)",
+      "Bash(sudo *)"
+    ],
+    "defaultMode": "acceptEdits",
+    "deny": [
+      "Read(~/.ssh/**)",
+      "Read(~/.aws/**)",
+      "Read(~/.gnupg/**)",
+      "Read(./.env)",
+      "Read(./.env.*)"
+    ]
+  },
+  "model": "sonnet",
+  "enabledPlugins": {
+    "rust-analyzer-lsp@claude-plugins-official": true
+  },
+  "effortLevel": "medium",
+  "attribution": {
+    "commit": "",
+    "pr": ""
+  },
+  "includeGitInstructions": true,
+  "autoUpdatesChannel": "stable"
+}