docstruct

A set of documentation rules for keeping project information clear, concise, and organized around a single source of truth. A source of truth is the one document treated as authoritative for a particular fact.

In plain words
What is it for?
Use it when creating, updating, or reviewing documentation, especially when deciding whether to edit an existing file, create a new one, or link to the authoritative details.
Why use it?
It reduces duplicated, outdated, and invented information in project documentation. It also makes unknown details and unfinished work visible.

Cursor rule

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/aetox-skills/docstruct/docstruct
Clone the repo
git clone --depth 1 https://github.com/aetox-skills/docstruct
Per session 20 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 138 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 $0.00020 $0.00138
Opus 5 $0.00010 $0.00069
Sonnet 5 $0.00004 $0.00028
Haiku 4.5 $0.00002 $0.00014

Measured yesterday against content hash 9a6a56c9ecb0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

docstruct 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.

adapters/cursor/docstruct.mdc · 21 lines

What it actually says

DocStruct Cursor Rule

When creating, updating, or auditing documentation:

  • Read existing docs before writing.
  • Update existing files before creating new files.
  • Create a new doc only when it has a clear responsibility.
  • Keep one source of truth for each durable fact.
  • Link instead of copying details.
  • Mark uncertain information as UNKNOWN.
  • Mark required work as TODO.
  • Keep docs short unless complexity requires detail.
  • Do not invent missing implementation details.
  • Avoid empty placeholder files.

Use the smallest structure that preserves clarity, ownership, and continuity.

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 · 21 lines · 20 tokens per session scan A 9a6a56c9ecb0

Subscribe to this mod's changes

docstruct is a cursor rule published in the GitHub repository aetox-skills/docstruct (1 stars, last pushed 2mo ago), licensed MIT. It adds 20 tokens to every session and 138 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.