tailor

Rules for developing software by looking for reusable code first and by using written specifications for larger work. They also recommend simple solutions and evidence-based verification.

In plain words
What is it for?
Use them when adding features, restructuring code, selecting dependencies, searching the project for existing solutions, and checking that changes work as intended.
Why use it?
They reduce duplication, unnecessary dependencies, unclear requirements, and unverified changes. The rules give the coding agent a consistent way to work within an existing repository.

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/amanktyr/tailor/tailor
Clone the repo
git clone --depth 1 https://github.com/AmanKtyr/Tailor

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 210 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 $0.00210
Opus 5 $0.00000 $0.00105
Sonnet 5 $0.00000 $0.00042
Haiku 4.5 $0.00000 $0.00021

Measured yesterday against content hash d76b717ab88b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tailor 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.cursor/rules/tailor.mdc · 16 lines

What it actually says

AI Agent Guidance (Powered by Tailor)

This repository uses Tailor for project intelligence, Spec-Driven Development, and Reuse-First engineering discipline.

Core Directives

  1. Constitution & Project Memory First: Always consult .ai/CONSTITUTION.md and .ai/INDEX.md before making non-trivial changes.
  2. Reuse-First Decision Ladder: Always search existing components, hooks, and utilities before writing new code.
  3. Pragmatic Simplicity: Prefer standard library and native platform APIs over trivial external dependencies.
  4. Spec-Driven Discipline: For non-trivial features, follow the specification lifecycle (specs/<id>/spec.md -> plan.md -> tasks.md).
  5. Truthful Verification: Verify changes with targeted tests; never fabricate test passes.
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 · 16 lines · 210 tokens per session scan A d76b717ab88b

Subscribe to this mod's changes

tailor is a cursor rule published in the GitHub repository AmanKtyr/Tailor (3 stars, last pushed 9d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 210 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.