server-implementation

Implementation rules for a local web server that displays design choices and receives the user’s selection. The server creates temporary files, finds an available port, and closes after a timeout or completed choice.

In plain words
What is it for?
They help serve the selection page, receive a chosen design, report whether selection is complete, support browser access, and shut down cleanly.
Why use it?
They define how the design-selection page communicates with the agent and how the temporary server is managed.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/madebyaris/rakitui-ai/server-implementation
Clone the repo
git clone --depth 1 https://github.com/madebyaris/rakitui-ai

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 207 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00207
Opus 5 $0.00000 $0.00103
Sonnet 5 $0.00000 $0.00041
Haiku 4.5 $0.00000 $0.00021

Measured 2d ago against content hash 9e946679ee4b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

server-implementation 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.

.cursor/rules/server-implementation.mdc · 27 lines

What it actually says

Server Implementation Details

The design selection tool uses a local HTTP server to display design options and handle user selection. This is implemented in src/tools/utils/serverUtils.ts.

Server Features

  • Creates a temporary directory for HTML files if needed
  • Finds an available port starting from 3000
  • Serves the design selection HTML page at /design-selection
  • Accepts design selection via POST to /design-selection-result
  • Provides selection status via /design-selection-finalized
  • Implements CORS for browser compatibility
  • Handles graceful server shutdown

Important Implementation Notes

  • The server maintains state using variables like selectedDesign and selectionComplete
  • Port finding logic increments until an available port is found
  • Server has a 15-minute timeout for user selection
  • The browser polls the server to know when to close itself
  • Temporary files are created with timestamped names for uniqueness
Changes

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.

  1. 2d ago First seen · 27 lines · 0 tokens per session scan A 9e946679ee4b

Subscribe to this mod's changes

server-implementation is a cursor rule published in the GitHub repository madebyaris/rakitui-ai (5 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 207 tokens. 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 2026-08-31.