build(deps): bump @typescript-eslint/parser from 6.17.0 to 8.59.0

[dependabot]

Bumps @typescript-eslint/parser from 6.17.0 to 8.59.0.

Release notes

Sourced from @​typescript-eslint/parser's releases.

v8.59.0

8.59.0 (2026-04-20)

🚀 Features

• eslint-plugin: [no-unnecessary-type-assertion] report more cases based on assignability (#11789)

❤️ Thank You

• Ulrich Stark

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.2

8.58.2 (2026-04-13)

🩹 Fixes

• remove tsbuildinfo cache file from published packages (#12187)
• eslint-plugin: [no-unnecessary-condition] use assignability checks in checkTypePredicates (#12147)

❤️ Thank You

• Abhijeet Singh @​cseas
• 송재욱

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.1

8.58.1 (2026-04-08)

🩹 Fixes

• eslint-plugin: [no-unused-vars] fix false negative for type predicate parameter (#12004)

❤️ Thank You

• MinJae @​Ju-MINJAE

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.0

8.58.0 (2026-03-30)

... (truncated)

Changelog

Sourced from @​typescript-eslint/parser's changelog.

8.59.0 (2026-04-20)

This was a version bump only for parser to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

8.58.2 (2026-04-13)

🩹 Fixes

• remove tsbuildinfo cache file from published packages (#12187)

❤️ Thank You

• Abhijeet Singh @​cseas

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

8.58.1 (2026-04-08)

This was a version bump only for parser to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

8.58.0 (2026-03-30)

🚀 Features

• support TypeScript 6 (#12124)

❤️ Thank You

• Evyatar Daud @​StyleShit

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

8.57.2 (2026-03-23)

This was a version bump only for parser to align it with other projects, there were no code changes.

See GitHub Releases for more information.

... (truncated)

Commits

• ea9ae4f chore(release): publish 8.59.0
• 90c2803 chore(release): publish 8.58.2
• be6b49a fix: remove tsbuildinfo cache file from published packages (#12187)
• 5311ed3 chore(release): publish 8.58.1
• 4933417 chore(release): publish 8.58.0
• 8cde2d0 feat: support TypeScript 6 (#12124)
• be4d54d chore(release): publish 8.57.2
• c7c38aa chore(release): publish 8.57.1
• 2c6aeee chore(release): publish 8.57.0
• f696dad chore: use pnpm catalog (#12047)
• Additional commits viewable in compare view

Maintainer changes

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[github-actions]

@dependabot merge

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

🟢 Metrics 0 complexity · 0 duplication

Metric	Results
Complexity	0
Duplication	0

View in Codacy

AI Reviewer: first review requested successfully. AI can make mistakes. Always validate suggestions.

_{TIP This summary will be updated as you push new changes.}

[codacy-production]

Pull Request Overview

This PR upgrades @typescript-eslint/parser to v8.59.0, which introduces breaking changes regarding environment requirements and peer dependencies. While the PR is up to standards according to Codacy, there are two significant issues that should be addressed before merging:

1. Peer Dependency Mismatch: The new parser requires eslint ^8.57.0, but the manifest still specifies ^8.56.0.
2. Node.js Engine Conflict: New transitive dependencies (e.g., eslint-visitor-keys v5.0.1) require Node versions >=20.19.0, which conflicts with the project's current >=20.0.0 requirement.

Updating these fields in package.json is necessary to prevent installation failures and peer dependency warnings in CI/CD environments.

About this PR

• The updated lockfile includes several packages that have been marked as deprecated, including eslint v8.57.1 and @humanwhocodes/config-array. While these are transitive or resolved versions, be aware that future upgrades to ESLint v9+ will likely be required to resolve these deprecations.

1 comment outside of the diff

package.json

_{line 61 🟡 MEDIUM RISK}
The project's Node.js requirement of >=20.0.0 is now broader than its transitive dependencies. Specifically, eslint-visitor-keys (v5.0.1) requires ^20.19.0 || ^22.13.0 || >=24. Update the engines.node field in package.json to ^20.19.0 || >=22.0.0 to align with the requirements of the new dependencies and prevent installation failures on older Node 20 patches.

Test suggestions

• Execute the project's linting process (e.g., 'npm run lint') to ensure no new parsing errors or rule regressions are introduced.
• Verify that 'npm install' or 'npm ci' completes without peer dependency warnings, specifically regarding the ESLint version mismatch.
• Validate the application on a Node.js 20.0.0 environment to ensure compatibility with transitive dependencies requiring higher minor versions (e.g., Node 20.19.0).

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Execute the project's linting process (e.g., 'npm run lint') to ensure no new parsing errors or rule regressions are introduced.
2. Verify that 'npm install' or 'npm ci' completes without peer dependency warnings, specifically regarding the ESLint version mismatch.
3. Validate the application on a Node.js 20.0.0 environment to ensure compatibility with transitive dependencies requiring higher minor versions (e.g., Node 20.19.0).

_{TIP Improve review quality by adding custom instructions
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[codacy-production]

_{🟡 MEDIUM RISK}

The @typescript-eslint/parser v8.59.0 requires eslint version ^8.57.0 or higher as a peer dependency, but package.json currently specifies ^8.56.0. Update the eslint dependency to at least ^8.57.0 to satisfy the peer dependency of the new parser and prevent warnings in environments performing strict manifest validation.