overview

A slow project-wide inventory and review of declarations, meaning the named definitions, theorems, and other items in a Lean project.

In plain words
What is it for?
Use it to create a project overview, optionally including a deeper assessment of whether public declarations could be contributed to mathlib.
Why use it?
It helps find duplicated work, opportunities to make code more general, missing interfaces, and unnecessary code across the project.

Command

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 commands/cbirkbeck/mathlib-quality/overview
Clone the repo
git clone --depth 1 https://github.com/CBirkbeck/mathlib-quality
Per session 9 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 7,976 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 $0.00009 $0.07976
Opus 5 $0.00005 $0.03988
Sonnet 5 $0.00002 $0.01595
Haiku 4.5 $0.00001 $0.00798

Measured 2d ago against content hash 55b31b886b40, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

overview 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.

commands/overview.md · 712 lines

How it starts

The opening of the file, as written. The whole thing — 712 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/overview - Deep Project Review

A slow, methodical review of the entire project. Produces a comprehensive inventory of every declaration, then performs deep analysis to find: moral duplications, generalization opportunities, missing API, and junk. This is not a quick scan. Take all the time needed. Do not skip steps.

Usage

/overview [directory_or_file]                  # full overview INCLUDING Step 9 mathlibable assessment
                                                # (slow — full /mathlibable per public decl; plan on hours)
/overview [directory_or_file] --skip-mathlibable  # everything except Step 9; faster draft view

Output: writes PROJECT_OVERVIEW.md in the project root. Per-decl mathlibable detail reports go to .mathlib-quality/overview/mathlibable/<decl>.md.

Step 9 is the slowest by far. It dispatches one /mathlibable Agent per non-skipped public declaration; each Agent runs the full 10-phase workflow with the exhaustive nine-channel literature search. The orchestrator narrates a one-line scoreboard between dispatches so you can leave the session running. Use --skip-mathlibable when you want a fast structural overview without the deep contribution assessment.


Philosophy

This command serves the same role as a senior mathematician reviewing a paper before submission:

  • Are the definitions at the right level of generality?
  • Are there lemmas that are morally the same and should be unified?
  • Is there missing API that would make proofs cleaner?
  • Are there definitions that shouldn't exist (duplicating mathlib or too specific)?
  • Could results be stated more generally (rings instead of fields, etc.)?

Take your time. Read proofs carefully. Think about the mathematics, not just the syntax.


Phase 1: Inventory (Per-File Workers)

Step 1: Find Files

Find all .lean files (excluding .lake/, build/):

find . -name "*.lean" -not -path "./.lake/*" -not -path "./build/*" | sort

Step 2: Dispatch Per-File Inventory Agents

Read the full file on GitHub · 712 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. 2d ago First seen · 712 lines · 9 tokens per session scan A 55b31b886b40

Subscribe to this mod's changes

overview is a command published in the GitHub repository CBirkbeck/mathlib-quality (32 stars, last pushed 13d ago), licensed MIT. It adds 9 tokens to every session and 7,976 once invoked, about $0.0000 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 2026-08-30.