Root directory cleanup

Question

The root directory should only contain two categories of files:

1. Tool-mandated: Files that are only found if they sit at the top: .gitignore, package.json, pyproject.toml, Cargo.toml, Makefile, CI configuration under .github/, editor configuration.

2. Community health files: README.md, LICENSE, CHANGELOG.md, CONTRIBUTING.md, CODE_OF_CONDUCT.md, SECURITY.md, CITATION.cff (research projects only).

Current root has many extra files: AGENTS.md, CLAUDE.md (symlink), CONTRIBUTING.md, GOAL.md, IMAGE_LIMIT_PATCH.md, README.zh-CN.md, flake.lock, flake.nix, tsconfig.json, vitest.config.ts, pnpm-lock.yaml, pnpm-workspace.yaml, .editorconfig, .gitattributes, .npmrc, .nvmrc, .oxfmtrc.json, .oxlintrc.json.

Decision needed: Which of these are tool-mandated and must stay at root? Which should move to docs/, scripts/, or be archived? The conventions say "Everything else moves out. A plan document, a spec, a task list, or a set of notes in the root is the single clearest sign of a repository that grew without a scheme."

Label: wayfinder:task
Part of #2517
Blocks: #2518

Start by reviewing the listed root files and the repository conventions, then inspect the roles of tsconfig.json, vitest.config.ts, pnpm-workspace.yaml, and the other configuration and notes files. Done means producing the requested classification and an agreed plan for files that stay, move to docs/ or scripts/, or are archived, while considering the dependency on #2517 and blocker #2518.