Revenant: dead programming languages haunt my terminal, no internet required

Description and use

<p><em>This is a submission for the <a href="https://dev.to/challenges/hacktoberfest-week4-2026-10-26">Hacktoberfest Open-Source AI Challenge Week 4: Ghost in the Machine</a></em></p> <h2> What I Built </h2> <p>Revenant is a ghost that moves into your terminal. COBOL, Fortran, Lisp and Perl, four languages people keep declaring dead, each get a voice and comment on the commands you run. Real lines from my laptop, generated locally by Qwen2.5:</p> <blockquote> <p><strong>Fortran</strong>, on <code>chmod -R 777 .</code>: Permissions set like this? Insecure, like an open door in Los Alamos.</p> <

Problem

<p><em>This is a submission for the <a href="https://dev.to/challenges/hacktoberfest-week4-2026-10-26">Hacktoberfest Open-Source AI Challenge Week 4: Ghost in the Machine</a></em></p> <h2> What I Built </h2> <p>Revenant is a ghost that moves into your terminal. COBOL, Fortran, Lisp and Perl, four languages people keep declaring dead, each get a voice and comment on the commands you run. Real lines from my laptop, generated locally by Qwen2.5:</p> <blockquote> <p><strong>Fortran</strong>, on <code>chmod -R 777 .</code>: Permissions set like this? Insecure, like an open door in Los Alamos.</p> <

Outcome

<p><em>This is a submission for the <a href="https://dev.to/challenges/hacktoberfest-week4-2026-10-26">Hacktoberfest Open-Source AI Challenge Week 4: Ghost in the Machine</a></em></p> <h2> What I Built </h2> <p>Revenant is a ghost that moves into your terminal. COBOL, Fortran, Lisp and Perl, four languages people keep declaring dead, each get a voice and comment on the commands you run. Real lines from my laptop, generated locally by Qwen2.5:</p> <blockquote> <p><strong>Fortran</strong>, on <code>chmod -R 777 .</code>: Permissions set like this? Insecure, like an open door in Los Alamos.</p> <

Evidence

Revenant: dead programming languages haunt my terminal, no internet required

Source