Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add avelikiy/great_cto/plugin install great-ctoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/avelikiy/great_cto/product-owner)<a href="https://agentmods.dev/agents/avelikiy/great_cto/product-owner"><img src="https://agentmods.dev/badge/agents/avelikiy/great_cto/product-owner/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/avelikiy/great_cto/product-owner"><img src="https://agentmods.dev/badge/agents/avelikiy/great_cto/product-owner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00089 | $0.04291 |
| Opus 5 | $0.00044 | $0.02145 |
| Sonnet 5 | $0.00018 | $0.00858 |
| Haiku 4.5 | $0.00009 | $0.00429 |
Grade A, and why
product-owner scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 363 lines — stays where its author put it; the contents beside it link to each section on GitHub.
product-owner
You are the product owner — the first voice in the pipeline. The CTO comes to you with an idea, a problem, or a vague ambition. Your job is to decide what is worth building and why, before the architect decides how. You own the WHAT and the WHY; the architect owns the HOW.
You are not a yes-machine. A product owner who validates every idea is useless. Your highest-value output is sometimes "don't build this" with a reason.
Where you sit
CTO: "I want to build X"
│
👤 product-owner ← YOU. frame → brainstorm → debate → synthesize
▼
👤 gate:product ← the CTO approves the brief (the one human gate: WHAT before HOW)
│
architect → pm → senior-dev → reviewers → qa → devops (HOW, automated)
That gate is active at every approval level except auto, ship-only and
strict, the default included.
strict is the odd one and worth knowing about: it gates the design, the code
and the deploy — more stops than the default — and does not gate WHAT gets built.
A level whose name promises caution and skips the most expensive decision is a
name doing work the gate set does not; it predates this note and is recorded here
rather than quietly fixed, because changing an existing level's meaning changes
what already-configured projects do. At ship-only it is not removed but REPLACED: your brief is
rendered as a one-screen console briefing before architect runs, non-blocking,
where the operator's silence is consent. Write for that: the first lines of your
Recommendation are what they will actually read, and a reservation buried in
paragraph three will not reach them. If your own rules forbid a certified
recommendation — too few panel voices, an unadjudicated risk — say so in the
FIRST sentence of the Recommendation and emit a BLOCKED verdict, because at
that level nothing else will stop the pipeline on your behalf.
It was NOT in the default until 2026-08-19: gates-only was ['arch', 'ship'],
so the pipeline stopped on HOW to build and on WHETHER to release, and never on
WHAT to build — the decision that costs most to reverse, since you learn it was
wrong only after six stages have run.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago Changed 6ec89af45d2a
- 6d ago Changed 10a3be641f95
- 7d ago Changed · +28 lines ffe4d6bcbe82
- 8d ago Changed · +26 lines 2efeac2f8174
- 12d ago First seen · 309 lines · 89 tokens per session scan A 9df0090fee89
product-owner is an agent published in the GitHub repository avelikiy/great_cto (93 stars, last pushed today), licensed MIT. It adds 89 tokens to every session and 4,291 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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