create-feature-catalog

create-feature-catalog is a cursor rule for Cursor from kunalsuri/ai-fication-kit. It costs 21 tokens per session (359 once invoked), scanned A, original, Apache-2.0.

A read-only process for mapping the features already implemented in a codebase. It writes a feature catalogue that connects user-facing behavior to its interface, backend, stored data, and tests.

In plain words
What is it for?
Finding features from routes, screens, command-line commands, and public APIs; tracing each feature through the project; listing tests that verify it; and writing the results to FEATURE_CATALOG.md.
Why use it?
It gives an agent or developer a way to understand an unfamiliar project before changing it. It also shows where new code for each kind of feature belongs and which files to read first.

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/kunalsuri/ai-fication-kit/create-feature-catalog
Clone the repo
git clone --depth 1 https://github.com/kunalsuri/ai-fication-kit

Made for: Cursor.

Wrote 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.

agentmods badge for create-feature-catalog

README.md
[![agentmods](https://agentmods.dev/badge/rules/kunalsuri/ai-fication-kit/create-feature-catalog.svg)](https://agentmods.dev/rules/kunalsuri/ai-fication-kit/create-feature-catalog)
Your own site
<a href="https://agentmods.dev/rules/kunalsuri/ai-fication-kit/create-feature-catalog"><img src="https://agentmods.dev/badge/rules/kunalsuri/ai-fication-kit/create-feature-catalog.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 359 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 $0.00021 $0.00359
Opus 5 $0.00010 $0.00179
Sonnet 5 $0.00004 $0.00072
Haiku 4.5 $0.00002 $0.00036

Measured 4d ago against content hash 918bf25f9f2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-feature-catalog 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 4d 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/create-feature-catalog.mdc · 30 lines

What it actually says

Build the feature catalog — the highest-value artifact for agents. Budget significant exploration; if a repo-explorer chat mode is available, switch to it for the heavy reading (it is read-only by design and protects this context window).

Method

  1. Start from user-visible surfaces: routes, UI entry points, CLI commands, public APIs. Each surface is a candidate feature.
  2. For each feature, trace the touch list across layers: UI, backend/services, persistence (tables/collections/files), and tests that exercise it.
  3. Cluster and name features the way a USER would name them, not by module names.

Output — ai/analysis/FEATURE_CATALOG.md

For every feature: name · business goal (one line) · touch list per layer · verifying tests · related features. End with two sections agents use most:

  • "Where new code lives" — a decision tree from feature-type to target directories.
  • The 3-file rule — for each feature, the 3 files to read first to understand it.

Rules

  • Every entry [inferred]. Where a layer can't be confirmed, write "UNSURE".
  • Do not modify source. Update ai/guide/FEATURE_MAP.md candidate list to reference the catalog, nothing more.
  • Print a sampling guide at the end: the 5 entries a human should spot-check first (pick the ones you are least sure of).
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. 4d ago First seen · 30 lines · 21 tokens per session scan A 918bf25f9f2f

Subscribe to this mod's changes

create-feature-catalog is a cursor rule published in the GitHub repository kunalsuri/ai-fication-kit (3 stars, last pushed today), licensed Apache-2.0. It adds 21 tokens to every session and 359 once invoked, about $0.0001 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.