Agent Skill
Coordinate Components skill
coordinate-componentsdotnet/skillsplugins/dotnet-blazor/skills/coordinate-components/SKILL.md
Share state between components that don't have a direct parent-child parameter relationship, using cascading values, scoped services with change events, or CascadingValueSource via DI. USE WHEN the user needs a CascadingParameter or CascadingValue that works across render mode boundaries, a shopping cart or notification count accessible from multiple pages, a theme or user preference cascaded app-wide, or when components in different parts of the tree must react when shared data changes. Also USE WHEN cascading values aren't reaching interactive children in per-page interactivity mode, or when the user needs to understand scoped vs singleton service lifetime for state on Blazor Server. DO NOT USE for direct parent-child parameter passing or EventCallback (see author-component), for persisting state across prerender-to-interactive transitions (see support-prerendering), or for service abstractions for data fetching in Auto/WebAssembly (see fetch-and-send-data).
always on
182 tokname + description
once used
2,059 tokSKILL.md body
bundled files
0
repo stars
5.7kGitHub
Install the Coordinate Components skill
Skills CLI (Claude Code, Codex, Cursor and others)
npx skills add https://github.com/dotnet/skills --skill coordinate-components
Claude Code, by hand (all projects)
git clone --depth 1 https://github.com/dotnet/skills.git /tmp/skills mkdir -p ~/.claude/skills cp -R /tmp/skills/plugins/dotnet-blazor/skills/coordinate-components ~/.claude/skills/coordinate-components
For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.
What it costs your context
Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.
| When | What loads | Cost |
|---|---|---|
| Every session | Name and description | 182 tok |
| When the agent uses it | The SKILL.md instructions | 2,059 tok |
| Only if opened | No bundled files | — |
Until it is used, coordinate-components costs about 7.5× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 114 skills from dotnet/skills would load 15,432 tokens of descriptions. Skills vs MCP study
Checks
Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.
Checked 2026-10-22 · method
What's inside
The headings of its SKILL.md. Read the full file on GitHub.
- Coordinate Components
- Step 1 — Read AGENTS.md
- Step 2 — Decide the scope
- Workflow (quick reference)
- Step 3 — CascadingValue for subtree state
- Step 4 — CascadingValueSource<T> for app-wide state
- Step 5 — Scoped state service with change events
- Step 6 — Render mode and service lifetime rules
- Cascading values don't cross render mode boundaries
- Service lifetime on Server vs WebAssembly
- Auto/WebAssembly with prerendering
- Don'ts
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