AG-UI is an event-based protocol that lets AI agent backends communicate with user-facing applications. It standardizes agent events and inputs while supporting transports such as server-sent events, WebSockets, and webhooks. The catalogue add-ons help developers build integrations and applications around the protocol.
Borrowing it
Nothing to install: this file belongs to ag-ui-protocol/ag-ui. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ag-ui-protocol/ag-ui/main/.github/skills/agui-dotnet-agents-sync/SKILL.mdgit clone --depth 1 https://github.com/ag-ui-protocol/ag-uiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ag-ui-protocol/ag-ui/agui-dotnet-agents-sync)<a href="https://agentmods.dev/skills/ag-ui-protocol/ag-ui/agui-dotnet-agents-sync"><img src="https://agentmods.dev/badge/skills/ag-ui-protocol/ag-ui/agui-dotnet-agents-sync.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00139 | $0.01401 |
| Opus 5 | $0.00069 | $0.00700 |
| Sonnet 5 | $0.00028 | $0.00280 |
| Haiku 4.5 | $0.00014 | $0.00140 |
Grade A, and why
agui-dotnet-agents-sync scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AG-UI .NET SDK — Docs Sync
sdks/dotnet/AGENTS.md (coding instructions) and sdks/dotnet/docs/architecture.md
(design overview) describe the SDK's structure, naming, and conventions. They
drift silently after refactors because nothing fails the build when prose goes
stale. This skill reconciles them against the live tree.
Typical drift this catches: a package rename, a moved/removed project, a changed endpoint pattern, or a new sample step that the prose never caught up with. An agent that edits these files from memory re-introduces the same kind of drift, so always derive the truth from the tree first.
Process
- Establish ground truth from the tree, not from the doc. The authoritative
source is
sdks/dotnet/AGUI.slnxplus the folder listing — never the prose you are about to edit.- Projects: read
<Project Path=...>entries fromAGUI.slnx. - Folders:
Get-ChildItem src,tests,samples -Directory. - Samples/steps: list
samples/GettingStarted/Step*to get the real range.
- Projects: read
- Drift scan — diff each doc claim against the tree. For every concrete
claim in AGENTS.md / docs/architecture.md, confirm it against ground truth:
- Project & package names exist in
AGUI.slnx(and insrc/,tests/). - Symbols the docs name still exist:
Select-String -Path src\*\*.cs,samples\*\*.cs -Pattern "<Symbol>". - Renamed/removed symbols are GONE everywhere: grep the repo for the old
name (e.g.
AGUI.Hosting.AspNetCore,TypedResults.ServerSentEvents); a hit in prose-only is the drift to fix.
- Project & package names exist in
- Fix surgically. Edit only the stale lines. Match existing tone, tables, and code-fence style. Do not restructure or invent conventions.
- Verify. Re-grep every symbol/name you wrote to confirm it exists in the
tree. Optionally
dotnet buildfromsdks/dotnet/if you touched code-style or build claims.
Drift checklist (the claims that rot)
| Doc claim | Reconcile against |
|---|---|
| src package list / names | AGUI.slnx /src/ folder + src/ dirs |
| Package dependency table & framework refs | grep Microsoft.AspNetCore src\*\*.csproj (must be empty — no src project references ASP.NET) |
| Where ASP.NET glue lives | samples/AGUI.Samples.Shared (the only FrameworkReference Microsoft.AspNetCore.App) |
| Test-project table & count | AGUI.slnx /tests/ + tests/ dirs |
| Sample step range / count | samples/GettingStarted/Step* listing |
| Endpoint pattern code | actual sample Program.cs + samples/AGUI.Samples.Shared |
| Project layout bullet list | src/, tests/, samples/ dirs |
| Code-style / naming / serialization rules | Directory.Build.props/.targets, Directory.Packages.props, source |
| PublicAPI workflow | presence of PublicAPI.*.txt in each src/ project |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 98 lines · 139 tokens per session scan A 582b86c94c1d
agui-dotnet-agents-sync is a skill published in the GitHub repository ag-ui-protocol/ag-ui (15,752 stars, last pushed today), licensed MIT. It adds 139 tokens to every session and 1,401 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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