René's URL Explorer Experiment


Title: Add layer-awareness guidance to test-affected-find skill by Copilot · Pull Request #1623 · usethis-python/usethis-python · GitHub

Open Graph Title: Add layer-awareness guidance to test-affected-find skill by Copilot · Pull Request #1623 · usethis-python/usethis-python

X Title: Add layer-awareness guidance to test-affected-find skill by Copilot · Pull Request #1623 · usethis-python/usethis-python

Description: Agents modifying low-level layers (e.g. _file) were not running tests for higher-level layers that depend on them, causing regressions like TestAddAuthor.test_append to slip through undetected. Changes usethis-python-test-affected-find skill (v1.0 → v1.1) Added an explicit step to check .importlinter before identifying tests to run Added "Use the layered architecture to scope test impact" section with the full layer stack from [importlinter:contract:usethis] and the rule: when modifying a layer, run tests for every layer above it too Updated "File I/O and serialization changes" to reference the layer-scoping rule rather than vague "identify which tools" guidance The layer hierarchy (lowest → highest): _pipeweld → _types|errors|_fallback → _config → _subprocess|_console|_python → _file → _backend → _integrations → _config_file → _deps → _detect → _init → _tool → _core → _toolset → _ui → _test|__main__ Modifying _file (e.g. TOMLFileManager) requires running tests all the way up through _core, _ui, etc. — not just tests/usethis/_file/. 💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

Open Graph Description: Agents modifying low-level layers (e.g. _file) were not running tests for higher-level layers that depend on them, causing regressions like TestAddAuthor.test_append to slip through undetected. Cha...

X Description: Agents modifying low-level layers (e.g. _file) were not running tests for higher-level layers that depend on them, causing regressions like TestAddAuthor.test_append to slip through undetected. Cha...

Opengraph URL: https://github.com/usethis-python/usethis-python/pull/1623

X: @github

direct link

Domain: github.com

route-pattern/:user_id/:repository/pull/:id/files(.:format)
route-controllerpull_requests
route-actionfiles
fetch-noncev2:f663a016-3258-d5cf-70e2-227781e0179f
current-catalog-service-hashae870bc5e265a340912cde392f23dad3671a0a881730ffdadd82f2f57d81641b
request-idC8C4:256945:E217F6:1407821:6A4CAEDF
html-safe-nonced2cda0aaaeac7ea964ffee20088ca90b2a29353f9a1443cd5d2c91cee93fa593
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiJDOEM0OjI1Njk0NTpFMjE3RjY6MTQwNzgyMTo2QTRDQUVERiIsInZpc2l0b3JfaWQiOiI4MDg1OTEwNDQwNjExOTgzMDcxIiwicmVnaW9uX2VkZ2UiOiJpYWQiLCJyZWdpb25fcmVuZGVyIjoiaWFkIn0=
visitor-hmacc57ddfc04d106aaad0f22a2f08936135ca0e93203723213549db55aa580f8ef8
hovercard-subject-tagpull_request:3461533008
github-keyboard-shortcutsrepository,pull-request-list,pull-request-conversation,pull-request-files-changed,copilot
google-site-verificationApib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-urlhttps://collector.github.com/github/collect
analytics-location///pull_requests/show/files
fb:app_id1401488693436528
apple-itunes-appapp-id=1477376905, app-argument=https://github.com/usethis-python/usethis-python/pull/1623/files
twitter:imagehttps://avatars.githubusercontent.com/in/1143301?s=400&v=4
twitter:cardsummary_large_image
og:imagehttps://avatars.githubusercontent.com/in/1143301?s=400&v=4
og:image:altAgents modifying low-level layers (e.g. _file) were not running tests for higher-level layers that depend on them, causing regressions like TestAddAuthor.test_append to slip through undetected. Cha...
og:site_nameGitHub
og:typeobject
hostnamegithub.com
expected-hostnamegithub.com
None3d11bb817438277de2a940854450e83a7d32b6aeb5014e9e6b00a6423900251c
turbo-cache-controlno-preview
diff-viewunified
go-importgithub.com/usethis-python/usethis-python git https://github.com/usethis-python/usethis-python.git
octolytics-dimension-user_id216362695
octolytics-dimension-user_loginusethis-python
octolytics-dimension-repository_id842189705
octolytics-dimension-repository_nwousethis-python/usethis-python
octolytics-dimension-repository_publictrue
octolytics-dimension-repository_is_forkfalse
octolytics-dimension-repository_network_root_id842189705
octolytics-dimension-repository_network_root_nwousethis-python/usethis-python
turbo-body-classeslogged-out env-production page-responsive
disable-turbotrue
browser-stats-urlhttps://api.github.com/_private/browser/stats
browser-errors-urlhttps://api.github.com/_private/browser/errors
releaseae90d426644ca15e89bacceb72e51f4e9dbf85f7
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://github.com/usethis-python/usethis-python/pull/1623/files#start-of-content
https://github.com/
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fusethis-python%2Fusethis-python%2Fpull%2F1623%2Ffiles
GitHub CopilotWrite better code with AIhttps://github.com/features/copilot
GitHub Copilot appDirect agents from issue to mergehttps://github.com/features/ai/github-app
MCP RegistryNewIntegrate external toolshttps://github.com/mcp
ActionsAutomate any workflowhttps://github.com/features/actions
CodespacesInstant dev environmentshttps://github.com/features/codespaces
IssuesPlan and track workhttps://github.com/features/issues
Code ReviewManage code changeshttps://github.com/features/code-review
GitHub Advanced SecurityFind and fix vulnerabilitieshttps://github.com/security/advanced-security
Code securitySecure your code as you buildhttps://github.com/security/advanced-security/code-security
Secret protectionStop leaks before they starthttps://github.com/security/advanced-security/secret-protection
Why GitHubhttps://github.com/why-github
Documentationhttps://docs.github.com
Bloghttps://github.blog
Changeloghttps://github.blog/changelog
Marketplacehttps://github.com/marketplace
View all featureshttps://github.com/features
Enterpriseshttps://github.com/enterprise
Small and medium teamshttps://github.com/team
Startupshttps://github.com/enterprise/startups
Nonprofitshttps://github.com/solutions/industry/nonprofits
App Modernizationhttps://github.com/solutions/use-case/app-modernization
DevSecOpshttps://github.com/solutions/use-case/devsecops
DevOpshttps://github.com/solutions/use-case/devops
CI/CDhttps://github.com/solutions/use-case/ci-cd
View all use caseshttps://github.com/solutions/use-case
Healthcarehttps://github.com/solutions/industry/healthcare
Financial serviceshttps://github.com/solutions/industry/financial-services
Manufacturinghttps://github.com/solutions/industry/manufacturing
Governmenthttps://github.com/solutions/industry/government
View all industrieshttps://github.com/solutions/industry
View all solutionshttps://github.com/solutions
AIhttps://github.com/resources/articles?topic=ai
Software Developmenthttps://github.com/resources/articles?topic=software-development
DevOpshttps://github.com/resources/articles?topic=devops
Securityhttps://github.com/resources/articles?topic=security
View all topicshttps://github.com/resources/articles
Customer storieshttps://github.com/customer-stories
Events & webinarshttps://github.com/resources/events
Ebooks & reportshttps://github.com/resources/whitepapers
Business insightshttps://github.com/solutions/executive-insights
GitHub Skillshttps://skills.github.com
Documentationhttps://docs.github.com
Customer supporthttps://support.github.com
Community forumhttps://github.com/orgs/community/discussions
Trust centerhttps://github.com/trust-center
Partnershttps://github.com/partners
View all resourceshttps://github.com/resources
GitHub SponsorsFund open source developershttps://github.com/sponsors
Security Labhttps://securitylab.github.com
Maintainer Communityhttps://maintainers.github.com
Acceleratorhttps://github.com/accelerator
GitHub Starshttps://stars.github.com
Archive Programhttps://archiveprogram.github.com
Topicshttps://github.com/topics
Trendinghttps://github.com/trending
Collectionshttps://github.com/collections
Enterprise platformAI-powered developer platformhttps://github.com/enterprise
GitHub Advanced SecurityEnterprise-grade security featureshttps://github.com/security/advanced-security
Copilot for BusinessEnterprise-grade AI featureshttps://github.com/features/copilot/copilot-business
Premium SupportEnterprise-grade 24/7 supporthttps://github.com/premium-support
Pricinghttps://github.com/pricing
Search syntax tipshttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
documentationhttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fusethis-python%2Fusethis-python%2Fpull%2F1623%2Ffiles
Sign up https://github.com/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E%2Fpull_requests%2Fshow%2Ffiles&source=header-repo&source_repo=usethis-python%2Fusethis-python
Reloadhttps://github.com/usethis-python/usethis-python/pull/1623/files
Reloadhttps://github.com/usethis-python/usethis-python/pull/1623/files
Reloadhttps://github.com/usethis-python/usethis-python/pull/1623/files
Please reload this pagehttps://github.com/usethis-python/usethis-python/pull/1623/files
usethis-python https://github.com/usethis-python
usethis-pythonhttps://github.com/usethis-python/usethis-python
Notifications https://github.com/login?return_to=%2Fusethis-python%2Fusethis-python
Fork 5 https://github.com/login?return_to=%2Fusethis-python%2Fusethis-python
Star 19 https://github.com/login?return_to=%2Fusethis-python%2Fusethis-python
Code https://github.com/usethis-python/usethis-python
Issues 163 https://github.com/usethis-python/usethis-python/issues
Pull requests 4 https://github.com/usethis-python/usethis-python/pulls
Actions https://github.com/usethis-python/usethis-python/actions
Security and quality 0 https://github.com/usethis-python/usethis-python/security
Insights https://github.com/usethis-python/usethis-python/pulse
Code https://github.com/usethis-python/usethis-python
Issues https://github.com/usethis-python/usethis-python/issues
Pull requests https://github.com/usethis-python/usethis-python/pulls
Actions https://github.com/usethis-python/usethis-python/actions
Security and quality https://github.com/usethis-python/usethis-python/security
Insights https://github.com/usethis-python/usethis-python/pulse
Sign up for GitHub https://github.com/signup?return_to=%2Fusethis-python%2Fusethis-python%2Fissues%2Fnew%2Fchoose
terms of servicehttps://docs.github.com/terms
privacy statementhttps://docs.github.com/privacy
Sign inhttps://github.com/login?return_to=%2Fusethis-python%2Fusethis-python%2Fissues%2Fnew%2Fchoose
nathanjmcdougallhttps://github.com/nathanjmcdougall
mainhttps://github.com/usethis-python/usethis-python/tree/main
copilot/configure-agents-layer-awarenesshttps://github.com/usethis-python/usethis-python/tree/copilot/configure-agents-layer-awareness
Conversation 0 https://github.com/usethis-python/usethis-python/pull/1623
Commits 2 https://github.com/usethis-python/usethis-python/pull/1623/commits
Checks 1 https://github.com/usethis-python/usethis-python/pull/1623/checks
Files changed https://github.com/usethis-python/usethis-python/pull/1623/files
Please reload this pagehttps://github.com/usethis-python/usethis-python/pull/1623/files
Add layer-awareness guidance to test-affected-find skill https://github.com/usethis-python/usethis-python/pull/1623/files#top
Show all changes 2 commits https://github.com/usethis-python/usethis-python/pull/1623/files
bfbdeef Initial plan Copilot Mar 28, 2026 https://github.com/usethis-python/usethis-python/pull/1623/commits/bfbdeefe379242432c571225c2ea856499fc5b68
c4dbe96 Update usethis-python-test-affected-find skill with layer-awareness g… Copilot Mar 28, 2026 https://github.com/usethis-python/usethis-python/pull/1623/commits/c4dbe9651646d9a97db62d1e602faa6b9842dda3
Clear filters https://github.com/usethis-python/usethis-python/pull/1623/files
Please reload this pagehttps://github.com/usethis-python/usethis-python/pull/1623/files
Please reload this pagehttps://github.com/usethis-python/usethis-python/pull/1623/files
.agents/skills/usethis-python-test-affected-find/SKILL.mdhttps://github.com/usethis-python/usethis-python/pull/1623/files#diff-aff69e5da5d0e290e91c2d2a86dafdacf9c037388cb29ac8d79ccd2bf1ed1b85
View file https://github.com/usethis-python/usethis-python/blob/c4dbe9651646d9a97db62d1e602faa6b9842dda3/.agents/skills/usethis-python-test-affected-find/SKILL.md
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/usethis-python/usethis-python/pull/1623/{{ revealButtonHref }}
https://github.com/usethis-python/usethis-python/pull/1623/files#diff-aff69e5da5d0e290e91c2d2a86dafdacf9c037388cb29ac8d79ccd2bf1ed1b85
https://github.com/usethis-python/usethis-python/pull/1623/files#diff-aff69e5da5d0e290e91c2d2a86dafdacf9c037388cb29ac8d79ccd2bf1ed1b85
https://github.com/usethis-python/usethis-python/pull/1623/files#diff-aff69e5da5d0e290e91c2d2a86dafdacf9c037388cb29ac8d79ccd2bf1ed1b85
https://github.com/usethis-python/usethis-python/pull/1623/files#diff-aff69e5da5d0e290e91c2d2a86dafdacf9c037388cb29ac8d79ccd2bf1ed1b85
https://github.com
Termshttps://docs.github.com/site-policy/github-terms/github-terms-of-service
Privacyhttps://docs.github.com/site-policy/privacy-policies/github-privacy-statement
Securityhttps://github.com/security
Statushttps://www.githubstatus.com/
Communityhttps://github.community/
Docshttps://docs.github.com/
Contacthttps://support.github.com?tags=dotcom-footer

Viewport: width=device-width

URLs of crawlers that visited me.