GPT-5.6 Terra
Normal C# or VB.NET, Web Forms, APIs, SQL, Telerik or Kendo, tests and refactoring.
Medium reasoningHR Focus development workspace · Resource library
Find validated Codex skills, proven support patterns, technical guides, training videos, templates and tools in one governed library.
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Codex working guide
Start with Terra Medium for most development. Use Luna to find, generate and repeat. Move to Sol High for difficult, important or high-risk work.
Open the complete guideNormal C# or VB.NET, Web Forms, APIs, SQL, Telerik or Kendo, tests and refactoring.
Medium reasoningProduction bugs, architecture, performance, authentication, migrations and final review.
High reasoningMax only for exceptionally hard workExploration, usages, boilerplate, simple CRUD, transformations, documentation and basic tests.
Low–Medium reasoningRapid interactive edits, tiny experiments and very small, easily verified changes.
Low reasoningGetting started
%USERPROFILE%\.codex\skills.$skill-name or let Codex match the request.$skillsRoot = Join-Path $env:USERPROFILE '.codex\skills'
New-Item -ItemType Directory -Path $skillsRoot -Force | Out-Null
Expand-Archive -LiteralPath 'C:\Downloads\skill-name.zip' -DestinationPath $skillsRoot
Keep it useful
Use the secured administration page to upload or update documents, skills, videos and versioned tools. Retire obsolete entries without losing the generated base catalog.