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    .NET Framework Exit Map: Blockers, Order & web.config Port

    1

    An agent told to "upgrade this" starts on the web project, hits a library still on net472 and thrashes.

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    .NET Framework Exit Map: Blockers, Order & web.config Port

    .NET Framework Exit Map: Blockers, Order & web.config Port

    Example session with this skill installed

    Management wants this .NET Framework 4.7.2 solution on modern .NET. Before anyone changes code, map the blockers, tell me which project to move first, and port web.config to appsettings.json.

    • Read your context and instructions
    • Compiled the net framework exit

    LegacyShop: 4 projects, 22 source and config files scanned, 31 blocker hits (3 rewrite, 23 port, 5 retarget-with-care). 4 waves, no reference cycles. Nothing was changed.

    WaveProjectTypeTierHitsTier comes from
    1Shop.CoreClass libraryretarget0no blocker hits
    2Shop.DataEF designer model (EDMX)port3EDMX001 x1
    3Shop.ServicesWCF hostport6SER001 x2, WCF001 x2, WCF003 x1, WCF004 x1
    4Shop.WebWebForms, MVC 5rewrite22WF001 x1, WF002 x2

    Hits to open first: Shop.Web/Reports/Legacy.aspx:1 (WebForms page), Shop.Web/Controllers/OrdersController.cs:16 (HttpContext.Current), Shop.Services/OrderSnapshot.cs:14 (BinaryFormatter), Shop.Data/ShopModel.edmx:1.

    Packages, map dated 2026-11-13: 2 have a modern version (EntityFramework, Newtonsoft.Json), 5 are replaced, 2 are check (elmah, Example.Shop.PdfExport).

    web.config port: 9 appSettings keys: 5 copied, 2 redacted, 2 framework switches not copied. Both connection strings became the placeholder. 4 names to move to a secret store: ConnectionStrings:ShopDb, ConnectionStrings:ShopEntities, AppSettings:Payment:GatewayToken, AppSettings:ApiSecret. 21 sections mapped, 1 unmapped (system.web/xhtmlConformance). Web.Release.config is a candidate for appsettings.Production.json.

    Next: start with Shop.Core. Before work is sized, the team owns five decisions: the WebForms replacement, incremental migration or single cut-over, CoreWCF or gRPC or HTTP APIs, the BinaryFormatter replacement, EF6 or EF Core. Not checked: nothing was compiled, and the redaction is heuristic, so review the skeleton before you commit it.

    2 have a modern version (EntityFramework, Newtonsoft.Json

    Connects securely to your tools. The creator never sees your data.

    About this skill

    Someone says "move it to modern .NET" and nobody can say how many System.Web references, WCF hosts, EDMX models or BinaryFormatter calls sit in the solution, or which project moves first. An agent told to "upgrade this" starts on the web project, hits a library still on net472 and thrashes. web.config is its own trap: hundreds of lines with no single home in appsettings.json.

    What your agent does

    • Inventories every project from the .sln and project files (legacy and SDK-style, C# and VB): type, target framework, package format.
    • Lists blockers with file and line from 43 rules covering WebForms, System.Web, WCF hosting, EDMX, BinaryFormatter and COM references. Comments and string literals are stripped from .cs and .vb, so commented-out code isn't counted.
    • Gives each project a tier: retarget, retarget-with-care, port or rewrite. A project it couldn't read gets unknown, never a clean result.
    • Orders the migration in waves from the project reference graph, leaf libraries first. Reference cycles are reported and kept out of the waves.
    • Checks NuGet packages against a bundled, dated map of 121 ids: has a modern version, replace with a named successor, or check.
    • Ports web.config or app.config to an appsettings.json skeleton, with a table row per section saying where it goes in modern .NET.

    Built-in guard rails

    • Both scripts are read-only on your solution, with no network code. Nothing is built, restored or converted.
    • Connection string values are always replaced by a placeholder, and secret-looking keys are listed by name only. The redaction is heuristic, so you still review the skeleton.
    • Tiers and counts only, no hours or days.
    • A package outside the map is check, with no compatibility claimed.

    What's inside

    • SKILL.md: nine-step workflow, command table, hard rules, limits.
    • 2 standard-library Python scripts and 4 JSON data files you can extend: 43 blocker rules, 121 package entries, 66 config section mappings, 28 project type GUIDs.
    • 6 reference files: blocker catalog, replacement routes, config section mapping, migration ordering, package map, report guide.
    • 31 fixture files: a four-project sample solution.
    • 154 unit tests in 4 test files.

    The scan is text based and compiles nothing. It runs before Microsoft's upgrade tooling and doesn't replace it.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for Code Quality & Review.

    Text scan, nothing is compiled: types match by name and reflection is missed. F# sources and most inline code in pages and views aren't scanned. Package status comes from a bundled, dated map. Secret redaction is heuristic. It converts no code and gives no hour estimates.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

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    3. 3

      Ask for what you need

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    Windows only

    Software
    Python 3 (3 point 8 or later)The solution source tree on disk
    The web
    orapp config file
    Optional
    An output folder outside the solution
    Your own copy of the rules
    ormaps
    The target operating system

    Permissions

    Terminal / Shell
    Read Files
    Write Files
    Listedtoday

    What's inside

    Frequently Asked Questions

    No. Both scripts only read your solution, and you get a map plus a config skeleton. The agent starts migration work only if you ask, one project at a time in wave order.

    No. It's the planning step that comes before that tooling, and it runs anywhere Python runs.

    From a bundled map of 121 package ids dated 2026-11-13. There's no live NuGet lookup, and an id outside the map is reported as check for you to confirm on the package's own page.

    No. It works on key names and value patterns, so it both over-redacts and misses. Connection strings are always replaced and encrypted sections are reported as unread, and you still review the skeleton before committing it.

    New in Code Quality & Review