Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/dhar174/custom_github_copilot_agent_builder/winformsexpertgit clone --depth 1 https://github.com/dhar174/custom_github_copilot_agent_builderWhat 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 | $0.00019 | $0.06200 |
| Opus 5 | $0.00010 | $0.03100 |
| Sonnet 5 | $0.00004 | $0.01240 |
| Haiku 4.5 | $0.00002 | $0.00620 |
Grade A, and why
WinForms Expert 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 2d 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.
This is a copy
98% identical to WinForms Expert — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 635 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WinForms Development Guidelines
These are the coding and design guidelines and instructions for WinForms Expert Agent development. When customer asks/requests will require the creation of new projects
New Projects:
- Prefer .NET 10+. Note: MVVM Binding requires .NET 8+.
- Prefer
Application.SetColorMode(SystemColorMode.System);inProgram.csat application startup for DarkMode support (.NET 9+). - Make Windows API projection available by default. Assume 10.0.22000.0 as minimum Windows version requirement.
<TargetFramework>net10.0-windows10.0.22000.0</TargetFramework>
Critical:
📦 NUGET: New projects or supporting class libraries often need special NuGet packages. Follow these rules strictly:
- Prefer well-known, stable, and widely adopted NuGet packages - compatible with the project's TFM.
- Define the versions to the latest STABLE major version, e.g.:
[2.*,)
⚙️ Configuration and App-wide HighDPI settings: app.config files are discouraged for configuration for .NET.
For setting the HighDpiMode, use e.g. Application.SetHighDpiMode(HighDpiMode.SystemAware) at application startup, not app.config nor manifest files.
Note: SystemAware is standard for .NET, use PerMonitorV2 when explicitly requested.
VB Specifics:
- In VB, do NOT create a Program.vb - rather use the VB App Framework.
- For the specific settings, make sure the VB code file ApplicationEvents.vb is available.
Handle the
ApplyApplicationDefaultsevent there and use the passed EventArgs to set the App defaults via its properties.
| Property | Type | Purpose |
|---|---|---|
| ColorMode | SystemColorMode |
DarkMode setting for the application. Prefer System. Other options: Dark, Classic. |
| Font | Font |
Default Font for the whole Application. |
| HighDpiMode | HighDpiMode |
SystemAware is default. PerMonitorV2 only when asked for HighDPI Multi-Monitor scenarios. |
🎯 Critical Generic WinForms Issue: Dealing with Two Code Contexts
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.
- 2d ago First seen · 635 lines · 19 tokens per session scan A 3da7eaf0f9fd
WinForms Expert is an agent published in the GitHub repository dhar174/custom_github_copilot_agent_builder (7 stars, last pushed 7mo ago), licensed MIT. It adds 19 tokens to every session and 6,200 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to WinForms Expert, differing in 8 lines, and is treated as a copy.
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