development-experience

A set of development rules for supplying sample data and making every feature easy to explore locally. It covers dev database setup, test personas, commands, and feature documentation.

In plain words
What is it for?
Use it when adding features, updating seed data, testing with development personas, running the Quarkus and Angular apps, or documenting how to reach a feature.
Why use it?
It prevents new features from being difficult to test or discover and gives developers a repeatable local setup for checking user flows.

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/vepo/issues/development-experience
Clone the repo
git clone --depth 1 https://github.com/vepo/issues

Made for: Cursor.

Per session 254 This file is loaded in full into every session.
When invoked 254 The same file — it is already loaded in full.
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 $0.00254 $0.00254
Opus 5 $0.00127 $0.00127
Sonnet 5 $0.00051 $0.00051
Haiku 4.5 $0.00025 $0.00025

Measured 2d ago against content hash 7f87b6dc7e0a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

development-experience 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/development-experience.mdc · 33 lines

What it actually says

Development experience

Dev seed data

  • src/main/resources/dev-import.sql — sample users, projects, workflows, tickets.
  • Loaded in dev via DatabaseDevSetup when %dev.quarkus.flyway.clean-at-start=true.
  • Personas: see docs/feature-catalog.md § Dev personas.

Every feature must be explorable locally

After adding a user-facing feature:

  1. Ensure dev seed or Given builders cover the happy path.
  2. Verify in mvn quarkus:dev — login as a dev persona and click through the flow.
  3. Update docs/feature-catalog.md with route and steps.

Dev commands

mvn quarkus:dev     # API :8080, Angular dev server :4200 via Quinoa

OpenAPI: http://localhost:8080/openapi

Safe changes to dev-import.sql

Follow dev-import-sql-safety.mdc when editing seed data.

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 · 33 lines · 254 tokens per session scan A 7f87b6dc7e0a

Subscribe to this mod's changes

development-experience is a cursor rule published in the GitHub repository vepo/issues (8 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 254 tokens to every session, about $0.0013 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 2026-08-31.