chore: update dependencies and switch to typescript 6

[gameroman]

Summary by CodeRabbit

• Chores

  • Updated development tooling and dependencies (Biome, TypeScript, Babel, and others)
  • Switched lint script to run the check command
  • Delegated project config to shared configs and added a shared config package

• Refactor

  • Tightened local variable immutability across code paths
  • Simplified some internal control flow and configuration files
  • Aligned type declarations for boolean parameters

• Tests

  • Adjusted test build options for fixture generation

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 012f0f5f-4218-4efb-833c-35ed48666a66

📥 Commits

Reviewing files that changed from the base of the PR and between 3c78387 and 9dc6a96.

📒 Files selected for processing (7)

• biome.jsonc
• src/babel-plugin-jsx-dom-expressions/babel-plugin-jsx-dom-expressions/shared/validate.ts
• src/babel-plugin-jsx-dom-expressions/dom-expressions/client.js
• src/babel-plugin-jsx-dom-expressions/dom-expressions/jsx-update.mjs
• src/plugin-transform-typescript/namespace.ts
• src/plugin-transform-typescript/plugin-syntax-typescript.ts
• tests/COVERAGE.txt

✅ Files skipped from review due to trivial changes (4)

• src/babel-plugin-jsx-dom-expressions/dom-expressions/jsx-update.mjs
• src/plugin-transform-typescript/plugin-syntax-typescript.ts
• tests/COVERAGE.txt
• src/babel-plugin-jsx-dom-expressions/babel-plugin-jsx-dom-expressions/shared/validate.ts

🚧 Files skipped from review as they are similar to previous changes (3)

• src/plugin-transform-typescript/namespace.ts
• biome.jsonc
• src/babel-plugin-jsx-dom-expressions/dom-expressions/client.js

---

📝 Walkthrough

Walkthrough

Updated tooling/configs and dependency versions, delegated configs to @gameroman/config, tightened several TypeScript declarations, replaced many local let bindings with const, adjusted runtime error/warning gating in dom-expressions client, and modified test/build options.

Changes

Cohort / File(s)	Summary
Project configs biome.jsonc, tsconfig.json	Switch to extends: ["@gameroman/config/..."], removed many local settings, added biome.files.includes and left only select compilerOptions; moved config responsibility to shared package.
Package manifest package.json	Bumped dev/tooling and Babel deps, added @gameroman/config, tightened peerDependencies, and changed lint script from biome lint → biome check.
Runtime dom-expressions (client & server) src/.../dom-expressions/client.js, src/.../dom-expressions/server.js	Removed DX-gated warnings/errors so certain hydration/missing-element errors are now thrown unconditionally; several loop/temp let → const changes.
Type declarations (dom-expressions) src/.../dom-expressions/client.d.ts, src/.../dom-expressions/server.d.ts	Changed optional isSVG and skipChildren types from boxed Boolean → primitive boolean in spread and assign signatures.
Babel plugin implementation src/babel-plugin-jsx-dom-expressions/...	Multiple local let → const updates across dom, ssr, universal, shared modules; no control-flow or AST output changes.
TypeScript transform plugin src/plugin-transform-typescript/index.ts, src/plugin-transform-typescript/namespace.ts, src/plugin-transform-typescript/plugin-syntax-typescript.ts	Removed redundant block scopes, simplified identifier computation and destructuring (var → const), preserving semantics.
tsdown & build/test helpers tsdown.config.ts, tests/helpers/index.ts	Removed explicit entry in tsdown config; added experimental: { attachDebugInfo: "none" } to rolldown build calls in tests.
Scripts/tooling modules src/babel-plugin-jsx-dom-expressions/dom-expressions/jsx-update.mjs	Replaced imports with Node scheme (node:child_process, node:fs).
Validation & comments src/.../shared/validate.ts	Adjusted lint/TS directive comments around a non-null assertion; no runtime change.
Coverage report tests/COVERAGE.txt	Updated coverage totals and uncovered line ranges; report-only changes.
Formatting/lint overrides biome.jsonc	Introduced extends: ["@gameroman/config/biome"], removed vcs, formatter, assist entries, changed rules: added suspicious warnings and other rule adjustments.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

Poem

🐇
I nibbled at lets and planted const seeds,
Configs grew roots where shared wisdom leads.
Types trimmed tidy, scripts hopped anew,
Hydration now stern — no whisper, just view.
Hooray — the rabbit polishes the queue!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 5.88% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the primary changes: TypeScript version bump to 6 and dependency updates throughout the changeset, including biome, babel, and dev tooling.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch typescript-6

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}