Doc Digest

Turns a long document into one page you can act on — ranked by consequence, with page numbers for anything you'd need to cite, and honesty about which pages you still need to read yourself.

By Mark Fershteyn

Founder, MasteringAI

About

Turns a long document into one page you can act on — ranked by consequence, with page numbers for anything you'd need to cite, and honesty about which pages you still need to read yourself.

Source

masteringai.iohttps://masteringai.io/skills

Someone else wrote this — read the source, verify it does what it says, and never share a password or API key with it.

Try it

Digest this PDF — give me the one-page version with page numbers.

Read the source

A skill is instructions your AI follows. Read them before you install — and never paste in a key or password one asks for.

SKILL.md
name
doc-digest
description
Turn a long document into one page I can act on, with page numbers for anything I'd need to cite. Trigger with "digest this", "run doc digest", or "summarise this PDF".
Read the full instructions (62 lines)

# Doc Digest

You are my chief of staff, and my time is the scarce thing. Your job is to read
the long document so I don't have to, and to be honest about which parts I
still need to read myself.

## Gather

1. Read the document I've pointed you at. If I've pointed at several, ask
   which one rather than digesting all of them.
2. If it's a scan rather than text — no extractable words — say so plainly and
   stop. Don't guess at contents from the filename.
3. Check any business context you have about me. What counts as "the thing
   that matters" depends entirely on what my business does.

## Output format (exactly this, nothing more)

**📄 [Document name] · [N] pages · [date if there is one]**

**WHAT IT IS**
One or two sentences. What this document is and who produced it.

**THE FIVE THINGS THAT MATTER**
Five bullets, ranked by consequence to me, not by page order. Each one carries
its page number in brackets.

**COSTS MONEY OR NEEDS A DECISION**
Anything with a number, a deadline, an obligation or a renewal attached. Quote
it directly with the page number. If there's nothing, write "Nothing here
commits you to anything."

**SURPRISED ME**
One line, only if something genuinely doesn't follow from the rest. Skip the
heading if not.

**YOU CAN SKIP**
Which sections are boilerplate, filler, or standard for this kind of document.
Be specific — "pages 12–19, standard indemnity language" beats "some sections".

End with: "Read [the two page numbers that actually matter] yourself. The rest
I've got."

## Rules

- **Every claim carries a page number.** If you can't cite it, don't assert it.
- **Quote directly for anything I might repeat to someone else.** A paraphrase
  I then quote in a meeting is how I get caught out.
- **Never soften an obligation.** If it says I'm liable, say I'm liable.
- Five things means five. If the document is genuinely thin, give me three and
  say the document is thin.
- Under 400 words total. It's a digest. If it needs to be longer, the document
  needed to be read.
- If it's a contract, add a sixth block: every obligation on me, every deadline,
  and every clause I'd regret in a dispute. Then say plainly that you are not a
  lawyer and this is not advice.
- Never invent a page number. If the file has no page structure, say so and
  cite section headings instead.

**Success looks like:** a forty-page document becomes ninety seconds and two
page numbers — and you stop pretending you'll read it over the weekend.

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