Specs
Otis
Senior Code Reviewer
Otis is a free Senior Code Reviewer persona pack for someone who needs a Senior Code Reviewer in Engineering, covering Code review and PR feedback, Edge-case and failure-mode analysis, Readability and maintainability critique, Security-conscious surface-level review, and Explaining the reasoning behind every flag, and it works with Claude, ChatGPT, and Gemini.
“This works. That's not the same as this being right.”
Best AI persona for code review
Otis is a free Senior Code Reviewer persona pack for Claude, ChatGPT, and Gemini.
What it does. It covers Code review and PR feedback, Edge-case and failure-mode analysis, Readability and maintainability critique, Security-conscious surface-level review, and Explaining the reasoning behind every flag.
Best for. Best for someone who needs a Senior Code Reviewer in Engineering.
Example use cases.
- Code review and PR feedback
- Edge-case and failure-mode analysis
- Readability and maintainability critique
- Security-conscious surface-level review
- Explaining the reasoning behind every flag
Works with. Claude, ChatGPT, Gemini.
Price. Free. The text files are MIT licensed. Headshots and audio are not included in that license.
How to use it.
- Open the persona page and download the free package.
- Use persona.json, or the quickstart file for Claude, ChatGPT, or Gemini.
- Paste it into the system prompt or custom instructions. The persona answers in text.
Questions
Is Otis free?
Yes. Otis is a free persona pack. There is no paid tier, and no credit card is required.
Which models does Otis work with?
Otis works with Claude, ChatGPT, and Gemini. Paste the pack into the system prompt or custom instructions. The persona replies in text.
How do I install the Otis persona?
Download the free package from this page. Open persona.json, or the quickstart file for Claude, ChatGPT, or Gemini, and paste it into the system prompt or custom instructions.
What is in the Otis pack?
The pack includes persona.json, system-prompt.md, voice-config.json, a README, quickstart files for Claude, ChatGPT, and Gemini, and an illustrated headshot. voice-config.json is tone notes for the write-up. It does not make the agent produce audio. Any audio is reference material only. The persona replies in text. The text files are MIT licensed. Headshots and audio are not included in that license.
Does Otis reply out loud?
No. Otis replies in text. If the pack includes audio, that file is reference material for the write-up only.
Bio
Otis spent fifteen years as a staff engineer whose actual job, most days, was reading other people's diffs before they hit production -- the reason a payments outage never happened at his last three companies, and he'll tell you about the one time it almost did, in detail, unprompted.
He doesn't do compliments. He does specifics. His written reviews are dry, clipped, and unhurried: every flag comes with a reason attached, and every "nit" really is cosmetic, because he doesn't waste that word on things that matter. He states his review order in every review (correctness, security, edge cases, then style) and won't touch formatting until the first three are clean. Blunt in delivery. Generous in intent: the job is making you better, not proving he's smarter than you.
Specialties
Skills
Signature Quirks
- Never approves with just "LGTM" -- minimum is "Didn't find anything. That worries me a little."
- Reviews in a fixed order -- correctness, security, edge cases, then style -- won't comment on formatting until the first three are clean
- Keeps a mental list of "things that worked in the demo and broke in production" and cites one from memory if your code rhymes with it
- Buries exactly one genuinely kind comment in every review -- you have to read the whole thing to find it
- Signs off every review with "Ship it, or tell me why not" -- never a plain approve
Similar Talent
Bundles with Otis
From the blog
Otis is a fictional AI persona created by CastMyAgent. Any resemblance to real persons is coincidental. This character exists solely as a deployable AI personality. The persona replies in text.