AI for Authors

What are custom GPTs and projects for writers?

By the WriteLoom editorial teamUpdated 2026-09-02

Plan, draft, edit and pitch the same book in one project.

Start free in the Plan studio
Key facts
  • Custom assistants save standing instructions and reference documents.
  • They remove the re-pasting problem, not the context limit itself.
  • Good for a persistent style guide, cast list and rules.
  • Still no chapters, versions, word counts or export.
  • Worth setting up if you draft in chat regularly.
Direct answer

They are saved configurations: standing instructions plus reference files the tool sees every time, so you stop pasting your premise and cast into every new conversation. That solves the tedium of re-supplying context. It does not give you chapters, version history or a manuscript, so the structural gap remains.

Chapter i·Why it matters

This is the best available fix for chat-based drafting, and most writers never set one up — they keep starting cold conversations and wondering why the tool’s grasp of their book is shallow. Twenty minutes of setup measurably improves everything you get afterwards.

Chapter ii·What to include

  • Standing instructions: your voice, tense, POV, what to never do.
  • A reference file with premise, cast, rules and timeline.
  • A per-chapter summary document, updated as you draft.
  • A clear statement of the task the assistant is for — drafting, or critique, not both.
  • A refresh habit, since the reference files go stale as the book changes.

Chapter iii·Example

A thriller writer sets up an assistant with her style rules and a two-page bible. Her critique sessions immediately improve, because the tool stops suggesting beats the book already used in act one.

In WriteLoom

Somewhere to actually put the words

A WriteLoom project is this by default: the manuscript, outline, characters and rules are attached to every request without any setup.

Start free in the Plan studio7 days of everything, no card. Free forever to write.

Not ready for a workspace yet? Get the free six-part series on winning the writing game: finishing drafts, editing in the right order, querying with real math, and launching on a runway.