Borrowing it
Nothing to install: this file belongs to Ron537/DPlex. 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/Ron537/DPlex/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/Ron537/DPlexWrote 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/instructions/ron537/dplex/copilot-instructions)<a href="https://agentmods.dev/instructions/ron537/dplex/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/ron537/dplex/copilot-instructions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/ron537/dplex/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/ron537/dplex/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" 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 | $0.02614 | $0.02614 |
| Opus 5.5 | $0.01046 | $0.01046 |
| Sonnet 5.5 | $0.00523 | $0.00523 |
| Haiku 4.5 | $0.00261 | $0.00261 |
Grade A, and why
DPlex copilot-instructions.md 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 1mo 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 — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DPlex — Copilot Instructions
Build & Run
npm run dev # Start Electron app in dev mode (hot reload)
npm run build # Typecheck + build (runs typecheck:node && typecheck:web first)
npm run lint # ESLint across entire project
npm run typecheck # TypeScript check only (no build)
npm run test:unit # Run unit tests (Vitest)
npm run test:e2e # Run Electron end-to-end tests (Playwright)
npm run test:monkey # Run randomized monkey tests (Playwright)
npm run test:all # Run all tests
Architecture
DPlex is an Electron + React terminal multiplexer that manages AI CLI tool sessions (Copilot CLI, Claude Code, etc.). It uses electron-vite with three process targets:
Process Boundaries
- Main process (
src/main/) — Node.js. PTY management vianode-pty, session discovery from filesystem, settings persistence. All file system and process operations live here. - Preload (
src/preload/index.ts) — IPC bridge. DefinesDplexAPIinterface exposed aswindow.dplex. This is the sole contract between main and renderer — every new IPC channel must be added to both the type definition and the implementation in this file. - Renderer (
src/renderer/) — React + Tailwind CSS v4. No direct Node.js or filesystem access; everything goes throughwindow.dplex.*IPC calls.
Provider System (AI Tool Abstraction)
AI tools are abstracted behind SessionProvider interface (src/main/services/providers/types.ts). To add a new AI CLI tool:
- Create a class implementing
SessionProviderinsrc/main/services/providers/ - Register it in
createDefaultRegistry()inproviders/index.ts
No other files need changes. The provider handles: session discovery, active session detection, close/delete, resume command generation, and session resolution by PID/CWD.
ProviderRegistry aggregates operations across all providers. IPC handlers in main/index.ts delegate to the registry.
State Management
Zustand stores (no Redux). Four stores, each owning a specific domain:
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.
- 1mo ago First seen · 165 lines · 2,614 tokens per session scan A 2c5608f76db9
DPlex copilot-instructions.md is an instructions file published in the GitHub repository Ron537/DPlex (20 stars, last pushed 2d ago), licensed MIT. It adds 2,614 tokens to every session, about $0.0105 per session on Opus 5.5. 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.
Other instructions, from other repositories
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vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.