COMMON-PATTERNS

A shared reference for concepts and evidence standards used by several development rule files. It explains how to support claims with sources, proof, and verification methods.

In plain words
What is it for?
Use it when investigating bugs, describing code changes, citing file locations, or applying the project's other rule sets.
Why use it?
It gives different rules a common meaning for terms such as file references and evidence, reducing vague or inconsistent reports.

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/qwickapps/ai-sdlc-workflows/common-patterns
Clone the repo
git clone --depth 1 https://github.com/qwickapps/ai-sdlc-workflows

Made for: Cursor.

Per session 2,050 This file is loaded in full into every session.
When invoked 2,050 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 $0.02050 $0.02050
Opus 5 $0.01025 $0.01025
Sonnet 5 $0.00410 $0.00410
Haiku 4.5 $0.00205 $0.00205

Measured yesterday against content hash 1b90d90028e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

COMMON-PATTERNS 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 yesterday.

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/.cursor/rules/COMMON-PATTERNS.mdc · 397 lines

How it starts

The opening of the file, as written. The whole thing — 397 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Common Patterns Reference

When to apply: Understanding shared concepts used across all rule files.


Core Shared Concepts

This file consolidates patterns used across VALIDATION-GATES, COMMUNICATION-PROTOCOL, RESEARCH-DEPTH, WORKTREE-ENFORCEMENT, FACT-VERIFICATION, INVESTIGATION-METHODS, ITERATION-GATES, SATISFACTORY-CRITERIA, and WRITING-STYLE.


1. Evidence Requirements

File:Line Reference Format

Standard format:

file.js:42                    # Single line
file.js:42-45                 # Line range
src/migrations/index.ts:137   # Absolute from project root

When required:

  • All factual claims about code
  • Bug locations
  • Implementation references
  • Configuration changes

Example:

✅ "Migration fails at readMigrationFiles (payload.config.ts:137)"
❌ "Migration fails in the config file"

Evidence Components

Every claim needs these 4 elements:

  1. Source: Where the information comes from

    • File path with line numbers
    • URL to documentation
    • Command output
  2. Evidence: Actual proof

    • Code snippet
    • Documentation quote
    • Test result
    • Screenshot (rare)
  3. Verification method: How you confirmed it

    • "Code inspection"
    • "WebFetch of documentation"
    • "Tested on clean database"
    • "Used Explore agent"
  4. Context: Version/date when relevant

    • Package version
    • Commit hash
    • Date of check
    • Platform version

2. Checklist Usage Pattern

Standard Checkbox Format

- [ ] Item to verify
- [ ] Another item to check
- [ ] Third verification point

How to Use Checklists

Before proceeding:

  1. Read each checkbox item
  2. Verify it's complete/true
  3. Mentally check it off
  4. If ANY fails, stop and fix it

Common mistake:

  • Skipping checklist items
  • Assuming items pass without checking
  • Proceeding when checkboxes fail

Correct approach:

  • Actually verify each item
  • Fix failures before proceeding
  • Document why skipped (if approved)

Read the full file on GitHub · 397 lines

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. yesterday First seen · 397 lines · 2,050 tokens per session scan A 1b90d90028e9

Subscribe to this mod's changes

COMMON-PATTERNS is a cursor rule published in the GitHub repository qwickapps/ai-sdlc-workflows (2 stars, last pushed 5mo ago), licensed MIT. It adds 2,050 tokens to every session, about $0.0103 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.