chore(main): release 9.0.0

[github-actions]

🤖 I have created a release beep boop

9.0.0 (2026-08-14)

⚠ BREAKING CHANGES

• robocop check-project was removed. Select project rules and run robocop check instead.
• custom project checkers have to accept the context argument in scan_project(project_source_file, config_manager, context).

Features

• add ambiguous-keyword-name project rule (KW06) (#1826) (8d8c2b4)
• add circular-import project rule (IMP08) (#1828) (ccc04ca)
• add keyword-not-found project rule (KW05) (#1827) (6d05e1a)
• Add robocop-check-project pre-commit hook (#1810) (315368d)
• add unused-library-import rule (#1825) (20f76ad)
• cache imported library keywords between runs (#1830) (93a9fad)
• project level context with rules using it (#1822) (527c5b9)
• run project rules as a part of the check command (#1824) (ecd971b)

Documentation

• mark project rules in the rules list (#1829) (09dd54a)

Refactoring

• merge control flow checkers into single ControlFlowChecker (#1818) (fb4afc2)
• merge deprecated statement checker into settings checker (#1820) (883f6fc)
• merge keyword and variable naming checkers (#1819) (ec7d75f)
• merge keyword argument checkers into a single checker (#1808) (67f7ab0)
• merge keyword body checkers into a single checker (#1812) (812d158)
• merge keyword call checkers into a single checker (#1807) (a2652a0)
• merge raw file checkers into a single checker (#1806) (98e2aff)
• merge section-level checkers into single SectionsChecker (#1813) (88c0b53)
• merge settings checkers into single SettingsChecker (#1817) (33f335a)
• merge tag checkers into single TagsChecker (#1815) (852b450)
• merge test case and keyword checkers into TestCaseKeywordChecker (#1814) (280b297)
• merge variable statement checkers into single VariablesChecker (#1816) (6d18ea2)
• move linter checkers to a dedicated package (#1821) (cc15ac3)

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This PR was generated with Release Please. See documentation.

[github-actions]

Performance Report

Version	Project traversal	Linting (print+cache)	Linting (print+no cache)	Linting (no print+cache)	Linting (no print+no cache)	Linting (large file with print)	Linting (large file without print)	Formatting
local	0.392s (0.19%)	2.820s (-0.4%)	4.125s (-2.0%)	0.558s (0.72%)	2.527s (-3.2%)	14.184s (-2.58%)	5.209s (-5.54%)	0.507s (-0.4%)
8.8.0	0.391s (0.6%)	2.832s (0.65%)	4.209s (1.07%)	0.554s (1.43%)	2.611s (0.87%)	14.560s (1.34%)	5.514s (1.6%)	0.509s (1.66%)
8.7.0	0.389s (-2.95%)	2.813s (-4.27%)	4.164s (-2.33%)	0.547s (-3.29%)	2.588s (-0.31%)	14.368s (-2.83%)	5.427s (2.57%)	0.501s (-5.77%)
8.6.0	0.401s (1.75%)	2.939s (3.79%)	4.264s (1.75%)	0.565s (1.37%)	2.596s (-0.35%)	14.786s (1.54%)	5.291s (-2.03%)	0.532s (5.63%)
8.5.0	0.394s (-92.29%)	2.832s	4.191s	0.558s	2.605s	14.562s	5.401s	0.503s
6.9.0	5.110s	-	-	-	-	-	-	-

[github-actions]

Performance Report

Version	Project traversal	Linting (print+cache)	Linting (print+no cache)	Linting (no print+cache)	Linting (no print+no cache)	Linting (large file with print)	Linting (large file without print)	Formatting
local	0.293s (0.51%)	2.386s (-1.42%)	3.499s (-3.93%)	0.445s (3.1%)	2.059s (-7.88%)	12.753s (-2.81%)	4.345s (-6.49%)	0.426s (1.6%)
8.8.0	0.291s (0.95%)	2.420s (0.01%)	3.642s (-0.69%)	0.432s (0.59%)	2.236s (0.33%)	13.122s (0.89%)	4.647s (1.41%)	0.420s (0.25%)
8.7.0	0.288s (-1.28%)	2.420s (0.09%)	3.668s (-0.22%)	0.429s (-0.88%)	2.228s (-0.71%)	13.007s (1.95%)	4.582s (-4.41%)	0.419s (-1.61%)
8.6.0	0.292s (-0.73%)	2.418s (0.49%)	3.676s (-0.35%)	0.433s (-0.63%)	2.244s (0.47%)	12.758s (0.22%)	4.793s (0.45%)	0.425s (-0.82%)
8.5.0	0.294s (-94.24%)	2.406s	3.689s	0.436s	2.234s	12.730s	4.772s	0.429s
6.9.0	5.110s	-	-	-	-	-	-	-