chore: add bun enforcement hook and local config patterns

[42tg]

Summary

• Add .claude/hooks/enforce-bun.sh to prevent accidental npm/yarn/pnpm usage in this bun-based monorepo
• Add .claude/settings.json with hook configuration
• Add local config patterns to .gitignore

Test plan

• Verify bun install still works normally
• Verify npm install is blocked by the hook

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Note

Low Risk
Only adds a Claude Bash pre-hook and expands .gitignore; no runtime application logic is affected, though the hook could block some developer workflows if it false-positives.

Overview
Adds a Claude PreToolUse Bash hook that reads the tool command input and fails fast if it detects npm, npx, yarn, or pnpm, steering usage to bun (including bunx for npx).

Registers this hook in .claude/settings.json so it runs before Bash tool executions, and expands .gitignore to exclude *.local.*, **/coverage/, and .playwright-mcp/ artifacts.

^{Written by Cursor Bugbot for commit 185abf0. This will update automatically on new commits. Configure here.}

Note

Add bun enforcement hook to block npm, npx, yarn, and pnpm in Bash tool executions

• Adds enforce-bun.sh, a PreToolUse hook that parses the Bash tool's command input via jq and exits with code 2 if it detects npm, npx, yarn, or pnpm usage, printing guidance to stderr.
• Registers the hook in .claude/settings.json so it runs automatically before every Bash tool invocation in this environment.
• Adds *.local.*, **/coverage/, and .playwright-mcp/ patterns to .gitignore.

^{Macroscope summarized 185abf0.}

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[macroscopeapp]

Approvability

Verdict: Approved

This PR adds developer tooling only - a Claude Code hook to enforce bun usage and gitignore patterns. No application runtime behavior is affected. The open review comment about regex edge cases is a valid improvement but doesn't block approval since it only affects completeness of the dev tool guard.

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[juliusmarminge]

block bun test as well, in favor of bun run test. agents love messing this one up. we have a sentence for it in agents.md which usually helps but might as well have it here too

[juliusmarminge]

we should already have this from the packageManager field in package.json though, or doesn't all package managers respect this?