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L3 · Mirror Station Heritage station

Sisyphus

An essay editor that remembers everything I've written. It never fully worked, but without it Speculum wouldn't exist.

OPENED
MAR 2026
BUILT WITH
Cursor (the first)
LIVE
Never: localhost only
SOURCE
Public on GitHub

Code on GitHub

Dark Sysiphus.io interface: a sidebar with projects and the Essay, Guided, Text Improvement, Critique and Style modes; the editor in the middle and The Oracle panel on the right.
What it looks like when you open it, running in 2026 from the original code: the five modes, the editor, and The Oracle, where the answers would appear.

ROUTE · L3 Mirror · 3 stations

  1. NOV 2025 · Heritage station PsicolocosBot
  2. YOU ARE HERE Sisyphus
  3. JUL 2026 · In service Speculum

Why it exists

An AI essay editor that remembers everything I've written: it critiques, suggests ideas, improves the writing and imitates styles. It was born because I drafted my essays with Gemini, kept them in a document, and context got lost from one to the next.

It was my first project with Cursor and my most ambitious one yet: four assistance modes, a guided mode and a four-layer memory for long essays.

It never fully worked or left localhost, because I didn't know how to test a system like that. But its core idea, writing, keeping and remembering essays, now lives inside Speculum.

It all started with a YouTube short: Marcus Aurelius didn't become who he was just through what he did, but because he wrote down what he felt. You can't know yourself if you don't think about who you are. It was a time of many thoughts at once, so I started keeping them.

I'm a bad writer, so I drafted the essays with Gemini and copied them into a document. Over time there were so many, and so much got lost between them, that I got stressed. Then I thought: what if an app remembered everything I've written, critiqued me, gave me ideas and helped me improve them?

I named it Sisyphus after the myth: pushing the boulder uphill again and again. It never fully worked and never left my computer. But when Speculum was born, what Sisyphus was trying to do ended up living there.

What it does

essay · improve · critique · style

Four ways to help

Develop an argument, polish the writing, find weak spots, or rewrite in a given style.

idea → structure → paragraphs

Guided mode

A step-by-step path from a loose idea to a finished essay.

4 context layers

A memory for long essays

Chunks, a master memory with the thesis, a per-paragraph window, and a hierarchical summary with RAG over SQL.

How it's built

5 commits · never left localhost

01 · EditorHTML + CSS + JSProjects, editor and guided mode.
02 · APIFastAPIAuth, caching and rate limiting.
03 · MemorySQLAlchemy + SQLiteChunks, thesis and summaries per essay.
04 · ModelOpenAICritiques, improves, imitates styles.
  • RAG
  • chunking
  • map-reduce
  • FastAPI
  • SQLAlchemy
  • Alembic
  • OpenAI API

Logbook

  1. MAR 2026A short about Marcus Aurelius. I start writing essays with Gemini and keeping them in a document.
  2. MAR 2026First project with Cursor: editor, four AI modes and an essay memory.
  3. JUL 2026It goes up on GitHub with migrations, auth and caching.
  4. JUL 2026Last change: the interface is rebuilt as "Espejo Existencial", the bridge to Speculum.

What I learned

  • The problem with building a system this ambitious without knowing how to test it is that you can't tell what works and what doesn't.
  • I learned to build something bigger: connecting an editor, an API, a database and a model.
  • Not working doesn't mean useless. It was the starting point for Speculum, and it was on my CV when I joined Intel.
  • Of all my projects, it's one of the ones I enjoyed building the most.