plugin: add installable dotnet skills

.agents/plugins/marketplace.json

@@ -48,7 +48,7 @@
         "path": "./plugins/dotnet-skills"
       },
       "policy": {
-        "installation": "NOT_AVAILABLE",
+        "installation": "AVAILABLE",
         "authentication": "ON_INSTALL"
       },
       "category": "Developer Tools"

CONTRIBUTING.md

@@ -165,6 +165,13 @@ scripts/release.sh custom 1.2.3
 
 Use the release modes in [`docs/maintainers/release-modes.md`](./docs/maintainers/release-modes.md) when preparing the actual release. Use `standard` for root-only releases and `subtrees` when a release also needs subtree pull/push accounting.
 
+Before opening or merging a release PR that changes marketplace entries,
+plugin manifests, or child plugin payloads, run the appropriate temporary
+`CODEX_HOME` smoke check from
+[`docs/maintainers/plugin-install-testing.md`](./docs/maintainers/plugin-install-testing.md)
+so the release proves the marketplace add path without touching a production
+Codex install.
+
 If the changed surface also introduces or expands Python-backed repo checks, add the required tools to the repo-local `uv` dev group and document the corresponding `uv run pytest`, `uv run ruff check .`, and `uv run mypy` commands where that repo's contributors will actually look.
 
 When editing docs, also review the rendered Markdown structure and cross-links for the files you changed.

README.md

@@ -23,15 +23,15 @@ Promo audio: [Socket Codex Marketplace Promo](./docs/media/socket-codex-marketpl
 
 ### Status
 
-`socket` is maintained and supported by Gale.
+`socket` is maintained by Gaelic Ghost.
 
 ### What This Project Is
 
 Socket is a Marketplace of Plugins, Hooks, and MCP servers for Apple Platform Devs
 
 ### Motivation
 
-Agents are great, but to do specialized work, they need specialized tools. As I continued building skills for my workflows, I needed a place to distribute them from. Socket is that place. I hope you find these as useful as I have.
+Agents are great, but to do specialized work, they need specialized tools. Socket is a shared catalog for focused Codex plugins, hooks, skills, and MCP-backed workflows.
 
 ## Quick Start
 
@@ -53,13 +53,14 @@ Newly added plugins can be installed from the same plugin directory inside Codex
 
 ## Usage
 
-Use `socket` when you want one Codex catalog for Gale's agent-focused plugin set.
+Use `socket` when you want one Codex catalog for focused agent workflow plugins.
 
 Currently available from the catalog:
 
 - `agent-plugin-skills`
 - `apple-dev-skills`
 - `cardhop-app`
+- `dotnet-skills`
 - `productivity-skills`
 - `python-skills`
 - `speak-swiftly`
@@ -75,6 +76,7 @@ Current Socket catalog shape:
 - `agent-plugin-skills`: maintainer skills for skills-export and plugin-export repositories
 - `apple-dev-skills`: Apple, Swift, SwiftUI, Xcode, and DocC workflows with its own roadmap
 - `cardhop-app`: mixed skill plus bundled MCP server for Cardhop.app contact workflows
+- `dotnet-skills`: .NET, F#, and C# project-shape, bootstrap, implementation, test, package, diagnostics, ASP.NET Core, interop, CI, upgrade, and tooling guidance
 - `productivity-skills`: general-purpose maintainer and documentation workflow baseline
 - `python-skills`: Python, `uv`, FastAPI, FastMCP, and pytest workflow plugin
 - `speak-swiftly`: Git-backed Speak Swiftly plugin from the standalone SpeakSwiftlyServer repository
@@ -83,7 +85,6 @@ Current Socket catalog shape:
 
 Placeholder directories for future plugins (not available for install):
 
-- `dotnet-skills`
 - `rust-skills`
 - `spotify`
 - `web-dev-skills`

ROADMAP.md

@@ -6,12 +6,13 @@
 - [Product Principles](#product-principles)
 - [Milestone Progress](#milestone-progress)
 - [Milestone 5: SwiftASB skills plugin](#milestone-5-swiftasb-skills-plugin)
+- [Milestone 6: Dotnet skills plugin](#milestone-6-dotnet-skills-plugin)
 - [Backlog Candidates](#backlog-candidates)
 - [History](#history)
 
 ## Vision
 
-- Keep `socket` as the honest superproject layer for Gale's public Codex plugin and skills ecosystem, with subtree imports, root marketplace wiring, and cross-repo maintainer guidance kept consistent.
+- Keep `socket` as the honest superproject layer for a public Codex plugin and skills ecosystem, with subtree imports, root marketplace wiring, and cross-repo maintainer guidance kept consistent.
 
 ## Product Principles
 
@@ -23,6 +24,7 @@
 ## Milestone Progress
 
 - Milestone 5: SwiftASB skills plugin - In Progress
+- Milestone 6: Dotnet skills plugin - In Progress
 
 ## Milestone 5: SwiftASB skills plugin
 
@@ -55,6 +57,37 @@ In Progress
 - [x] The new skills guide SwiftUI, AppKit, and Swift package integrations without duplicating broad Apple framework guidance that belongs to `apple-dev-skills`.
 - [x] Root Socket docs, marketplace wiring, and validation agree on the plugin's install surface.
 
+## Milestone 6: Dotnet skills plugin
+
+### Status
+
+In Progress
+
+### Scope
+
+- [x] Turn the placeholder `dotnet-skills` child plugin into an installable `.NET` guidance plugin.
+- [x] Treat F# and C# as equal first-party `.NET` language choices in plugin metadata, skill descriptions, examples, scaffolding guidance, and diagnostics.
+- [x] Keep the plugin as a companion guidance surface rather than a runtime plugin: do not bundle an MCP server, custom package manager, private template feed, or machine-local SDK state.
+
+### Tickets
+
+- [x] Record the detailed plugin plan in [`docs/maintainers/dotnet-skills-plugin-plan.md`](./docs/maintainers/dotnet-skills-plugin-plan.md).
+- [x] Update `plugins/dotnet-skills/AGENTS.md` with the F#/C# parity policy and `.NET` validation expectations.
+- [x] Update `plugins/dotnet-skills/.codex-plugin/plugin.json` so plugin metadata includes F# and avoids C#-only wording.
+- [x] Add first-slice skills for project-shape choice, solution bootstrap, F# project implementation, C# project implementation, and test workflow.
+- [x] Add second-slice skills for package workflow, diagnostics, ASP.NET Core services, F#/C# interop, CI, upgrades, and tooling/style alignment.
+- [x] Switch the root marketplace entry for `dotnet-skills` from placeholder to installable only after real skill content exists.
+- [x] Update root README and maintainer docs so users understand the new installable child plugin surface.
+- [x] Run root metadata validation with `uv run scripts/validate_socket_metadata.py` and any child-plugin checks added by the new plugin.
+
+### Exit Criteria
+
+- [x] The Socket marketplace exposes `dotnet-skills` as an installable child plugin.
+- [x] The new skills can help an agent choose a `.NET` project shape before implementation.
+- [x] The new skills guide F# and C# implementation without making either language a secondary path.
+- [x] The testing guidance uses `dotnet test` as the stable command surface while respecting repo-local test framework choices.
+- [x] Root Socket docs, marketplace wiring, and validation agree on the plugin's install surface.
+
 ## Backlog Candidates
 
 - [x] Overhaul `agent-plugin-skills` so its docs, tests, generated bootstrap content, and sync audit logic target Codex/OpenAI plus the open `.agents/skills` discovery mirror only. Remove stale expectations for retired child maintainer docs such as reality-audit and install-surface docs, and keep the wording away from unsupported non-Codex or generic multi-agent surfaces.