Migrate package_config to package:checks.

[lrhn]

No description provided.

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:api_summary	0.1.0-wip	WIP (no publish necessary)
package:bazel_worker	1.1.5	already published at pub.dev
package:benchmark_harness	2.4.0	already published at pub.dev
package:boolean_selector	2.1.2	already published at pub.dev
package:browser_launcher	1.2.0-wip	WIP (no publish necessary)
package:cli_config	0.2.1-wip	WIP (no publish necessary)
package:cli_util	0.5.1	already published at pub.dev
package:clock	1.1.3-wip	WIP (no publish necessary)
package:code_builder	4.12.0-wip	WIP (no publish necessary)
package:coverage	1.15.0	already published at pub.dev
package:csslib	1.0.2	already published at pub.dev
package:extension_discovery	2.1.0	already published at pub.dev
package:file	7.0.2-wip	WIP (no publish necessary)
package:file_testing	3.1.0-wip	WIP (no publish necessary)
package:glob	2.1.3	already published at pub.dev
package:graphs	2.4.0-wip	WIP (no publish necessary)
package:html	0.15.7-wip	WIP (no publish necessary)
package:io	1.1.0-wip	WIP (no publish necessary)
package:json_rpc_2	4.1.0	already published at pub.dev
package:markdown	7.4.0	ready to publish	markdown-v7.4.0
package:mime	2.1.0-wip	WIP (no publish necessary)
package:oauth2	2.0.5	already published at pub.dev
package:package_config	2.3.0-wip	WIP (no publish necessary)
package:pool	1.5.3-wip	WIP (no publish necessary)
package:process	5.0.5	(error) pubspec version (5.0.5) and changelog (5.0.6-wip) don't agree
package:pub_semver	2.2.0	already published at pub.dev
package:pubspec_parse	1.6.0-wip	WIP (no publish necessary)
package:source_map_stack_trace	2.1.3-wip	WIP (no publish necessary)
package:source_maps	0.10.14-wip	WIP (no publish necessary)
package:source_span	1.10.2	already published at pub.dev
package:sse	4.2.0	already published at pub.dev
package:stack_trace	1.12.2-wip	(error) pubspec version (1.12.2-wip) and changelog (1.12.2-dev) don't agree
package:stream_channel	2.1.4	already published at pub.dev
package:stream_transform	2.1.2-wip	WIP (no publish necessary)
package:string_scanner	1.4.2-wip	WIP (no publish necessary)
package:term_glyph	1.2.3-wip	WIP (no publish necessary)
package:test_reflective_loader	0.6.0	ready to publish	test_reflective_loader-v0.6.0
package:timing	1.0.2	already published at pub.dev
package:unified_analytics	8.0.15	ready to publish	unified_analytics-v8.0.15
package:watcher	1.2.2-wip	WIP (no publish necessary)
package:yaml	3.1.4-wip	WIP (no publish necessary)
package:yaml_edit	2.2.4	already published at pub.dev

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[github-actions]

PR Health

API leaks ✔️

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbol	Leaking sources

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Unused Dependencies ⚠️

Package	Status
package_config	❗ Show Issues These packages are used outside lib/ but are not dev_dependencies: * path

For details on how to fix these, see dependency_validator.

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License Headers ✔️

// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

Files
no missing headers

All source files should start with a license header.

Unrelated files missing license headers

Files
pkgs/bazel_worker/benchmark/benchmark.dart
pkgs/coverage/lib/src/coverage_options.dart
pkgs/html/example/main.dart
pkgs/pubspec_parse/test/git_uri_test.dart
pkgs/watcher/test/custom_watcher_factory_test.dart

This check can be disabled by tagging the PR with skip-license-check.

Changelog Entry ✔️

Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

This check can be disabled by tagging the PR with skip-changelog-check.

Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
package_config	Breaking	2.2.0	2.3.0-wip	2.3.0-wip	✔️

This check can be disabled by tagging the PR with skip-breaking-check.

Coverage ⚠️

File	Coverage
pkgs/package_config/example/bin/package_config_of.dart	💔 Not covered

This check for test coverage is informational (issues shown here will not fail the PR).

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[gemini-code-assist]

Code Review

This pull request migrates the package's tests from the legacy test package's expect assertions to the modern checks package. It updates pubspec.yaml dependencies and refactors assertion patterns across several test files (discovery_test.dart, discovery_uri_test.dart, package_config_impl_test.dart, and parse_test.dart). The reviewer suggested improving readability in parse_test.dart by explicitly promoting a nullable variable to non-nullable right after its null check, rather than relying on implicit flow analysis promotion on subsequent property accesses.

[kevmoo]

Cool to see this!

[kevmoo]

No need to document this change. Does not affect users.