Update Roslyn MCP Plugin (maintainer override)

This .claude/skills/update/ override is auto-discovered only inside the Roslyn-Backed-MCP repo checkout and takes precedence over the shipped skills/update/SKILL.md when present. It exists because shipped skills are scanned for repo-specific paths (eng/...) by eng/verify-skills-are-generic.ps1 — so the shipped skill has to stay on the /plugin slash-command path, but maintainers in-repo have a PowerShell updater that works when the client refuses /plugin.

Workflow (Layer 1 unchanged, Layer 2 replaced)

Step 1: Check Current Version

Call server_info. Report current version, latest NuGet version, updateAvailable.

Step 2: Update Layer 1 — Global Tool

dotnet tool update -g Darylmcd.RoslynMcp || dotnet tool install -g Darylmcd.RoslynMcp

In-repo alternatives: just tool-update (NuGet.org) or just tool-install-local after just pack.

Step 3: Update Layer 2 — Claude Code Plugin

Preferred (agent-executable, works even when `/plugin` slash-commands are unavailable):

pwsh -NoProfile -File eng/update-claude-plugin.ps1

The script replicates /plugin marketplace update + /plugin install without going through the client:

• git pulls the marketplace clone at ~/.claude/plugins/marketplaces/roslyn-mcp-marketplace/
• Re-syncs the plugin cache at ~/.claude/plugins/cache/roslyn-mcp-marketplace/roslyn-mcp/<new-version>/ from git-tracked files only (710+ files at 1.29.0)
• Prunes stale <old-version>/ cache directories
• Updates installed_plugins.json + known_marketplaces.json with the new version, commit SHA, and UTC timestamp

Requires the plugin to have been installed through Claude Code at least once (so the marketplace clone exists). Reports resolved version, target cache dir, copied-file count, and pruned stale dirs.

Fallback (chat-side, if you prefer to go through the client):

/plugin marketplace update roslyn-mcp-marketplace
/plugin install roslyn-mcp@roslyn-mcp-marketplace

If the client responds with /plugin isn't available in this environment, use the PowerShell path above.

Step 4: Report

Same as the shipped skill — previous version, new version, layers updated, reminder to restart Claude Code.

Why this override exists

During the v1.29.0 release-cut (PR #377), the Claude Code client refused /plugin slash-commands with /plugin isn't available in this environment. Layer 1 was updated via just tool-install-local but Layer 2 sat at 1.28.1 in the plugin cache. The repo already shipped eng/update-claude-plugin.ps1 (a maintainer-only script, agent-executable, idempotent) that does exactly what the two slash-commands do — it just wasn't the documented primary path because the shipped skill isn't allowed to reference repo-specific eng/ paths under verify-skills-are-generic.ps1. This override closes that gap for anyone running /roslyn-mcp:update from inside the Roslyn-Backed-MCP repo.