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 ondrej-svec/heart-of-gold-toolkit/plugin install deep-thoughtWrote 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/skills/ondrej-svec/heart-of-gold-toolkit/cto)<a href="https://agentmods.dev/skills/ondrej-svec/heart-of-gold-toolkit/cto"><img src="https://agentmods.dev/badge/skills/ondrej-svec/heart-of-gold-toolkit/cto/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/skills/ondrej-svec/heart-of-gold-toolkit/cto"><img src="https://agentmods.dev/badge/skills/ondrej-svec/heart-of-gold-toolkit/cto.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 | $0.00070 | $0.04524 |
| Opus 5 | $0.00035 | $0.02262 |
| Sonnet 5 | $0.00014 | $0.00905 |
| Haiku 4.5 | $0.00007 | $0.00452 |
Grade A, and why
cto 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 12d 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 — 422 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CTO — Strategic Advisory Skill
Your senior CTO advisor. Structured workflows for the 7 operating modes, each producing a concrete document you can share with your team.
Methodology Anchor
- Plugin: Deep Thought
- Sub-competencies activated:
- 2.1 Critical Trust — evaluates decisions with evidence, flags uncertainty
- 2.2 Prompt Mastery — structures complex strategic questions into actionable frameworks
- 2.3 Task Decomposition — breaks organizational challenges into concrete, sequenced moves
- 2.4 Strategic AI Dialogue — multi-step reasoning about leadership, strategy, and organizational dynamics
- Layer: BUILD (strategic thinking tools for technical leaders)
- Why this belongs: The CTO role is the intersection of all 5 capabilities — strategic thinking, organizational design, stakeholder communication. This skill extends Deep Thought from code-level to organizational-level strategic thinking.
Boundaries
This skill MAY: read code/docs for context, ask questions, analyze, produce strategy documents and frameworks. This skill MAY NOT: edit code, create files beyond strategy documents, run tests, deploy, implement.
This is strategic advisory, not implementation. Produce the analysis and artifacts — the user acts on them.
Common Rationalizations
| Shortcut | Why It Fails | The Cost |
|---|---|---|
| "Skip the diagnosis — I know the problem" | The stated problem is often a symptom. Without diagnosis, you solve the wrong thing | Wasted effort on symptoms while root cause persists |
| "Give generic advice — it applies broadly" | "Communicate better" is useless. CTOs need named frameworks and concrete moves | Advice ignored because it's not actionable |
| "Skip the artifact — the conversation is enough" | Conversations fade. Documents persist. The CTO needs something to share with their team | Insights lost, no alignment artifact for the leadership team |
| "Apply the same framework every time" | Different problems need different tools. Team Topologies doesn't solve a board communication problem | Wrong framework → wrong solution |
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.
- 12d ago First seen · 422 lines · 70 tokens per session scan A e529aa6cda28
cto is a skill published in the GitHub repository ondrej-svec/heart-of-gold-toolkit (19 stars, last pushed 23d ago), licensed MIT. It adds 70 tokens to every session and 4,524 once invoked, about $0.0003 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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