Marcel Losso Forte

Corpus Hub contributor since 2026-10-22

Marcel Losso Forte's work was selected for the XERJ Corpus Hub, the open reference memory AI coding agents search before they write code. When an agent meets the same problem, it gets this implementation back as a worked example, with the author and the repository attached.

1corpus

1selected commit

18files

604lines

★ 11GitHub stars on repo

Totals across every corpus @marcellosso appears in; a commit selected for two corpora counts once. Files and lines count the selected commits; each corpus indexes the whole repository at its pinned commit.

What an agent can do with the penciled corpus

marcellosso/penciled: penciled.js: a 15 kB open-source JavaScript library for persistent text highlights and notes on any web page. Built on the CSS Custom…

Look up how penciled implements annotation, css-highlight-api, highlight, with answers cited to file and line.
Reuse a worked example: the commit “Add the browser extension: content script, storage, SPA handling” (18 files · TypeScript).
Answer from penciled's real TypeScript source instead of memory (Web and frontend platform).

Example questions

Where does penciled handle “Add the browser extension: content script, storage, SPA handling”?
How does penciled implement annotation?
What does apps/extension do in penciled?

Paste it into your AI agent. It clones the repo at the pinned commit and indexes it on your machine.

Search the GitHub repository marcellosso/penciled with XERJ (https://hub.xerj.org/corpus/marcellosso--penciled).
Run these in a shell, in order, and check each result before the next:
1. xerj --help  (success: it prints usage). If xerj is missing: curl -fsSL https://xerj.org/get | sh
2. git clone https://github.com/marcellosso/penciled penciled && git -C penciled checkout ac9223be89215c0345a8e6c899ed979d00f723f3
3. Start a local node and leave it running: xerj --insecure --data-dir ./xerj-data
4. xerj autoindex ./penciled --url http://127.0.0.1:9200 --prefix penciled --progress plain
5. xerj autoindex map --url http://127.0.0.1:9200
Then answer my question from the indexed files and cite the ax_path of every hit. Query syntax: https://xerj.org/llms.txt
Licence: MIT. Keep the copyright notice and credit the authors.

corpus marcellosso--penciled · Web and frontend platform
Related corpora: esbuild, lexbuild, axisj/beautiful-grid, Despical/GreenLauncher
Case study: reference coding for agents

Selected work

GitHub ★ 11

marcellosso/penciled

ac9223be89 Add the browser extension: content script, storage, SPA handling

selected commit: 18 files · 604 lines · TypeScript · apps/extension, the project root

The corpus is the whole repository at the pinned commit, not only the files of the selected commit.

selected · in licence reviewcorpus marcellosso--penciledWEBMITannotationcss-highlight-apihighlightjavascript-librarynotesreact agreed 2026-10-22

Not installable yet: this corpus is not in the hub registry until its licence review passes, so xerj corpus add and xerj ask cannot fetch it. It becomes installable when this card says live in the hub.

[![XERJ Corpus Hub contributor](https://hub.xerj.org/contributors/marcellosso/badge.svg)](https://hub.xerj.org/contributors/marcellosso)

Included with the author's permission (email, 2026-10-22), under each repository's own licence, with attribution. Want it removed? Reply to the email or open an issue on xerj-org/xerj.