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/architect)<a href="https://agentmods.dev/skills/ondrej-svec/heart-of-gold-toolkit/architect"><img src="https://agentmods.dev/badge/skills/ondrej-svec/heart-of-gold-toolkit/architect/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/architect"><img src="https://agentmods.dev/badge/skills/ondrej-svec/heart-of-gold-toolkit/architect.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 | $0.00058 | $0.01872 |
| Opus 5.5 | $0.00023 | $0.00749 |
| Sonnet 5.5 | $0.00012 | $0.00374 |
| Haiku 4.5 | $0.00006 | $0.00187 |
Grade A, and why
architect 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 2mo 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 — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Architect
Turn decisions into stories + architecture. Answers WHAT to build and HOW it fits together — the bridge between brainstorm and implementation.
Boundaries
This skill MAY: research (read-only), analyze codebase patterns, write stories and architecture docs. This skill MAY NOT: edit code, create source files, run tests, deploy, implement anything.
NEVER write code during this skill. Design and document only.
Common Rationalizations
| Shortcut | Why It Fails | The Cost |
|---|---|---|
| "Skip codebase research — I know the patterns" | Your mental model may not match the actual codebase | Architecture conflicts with existing code → rework |
| "Write vague stories — the implementer will figure it out" | Vague stories produce vague implementations | Ambiguity → wrong code → rework |
| "Skip ADRs — the decision is obvious" | Obvious now, forgotten in 2 weeks | Decision gets reversed without understanding tradeoffs |
| "One big story — splitting is overhead" | Big stories hide complexity and block parallel work | Unestimable, unreviewable, unshippable |
Phase 1: Load Context
Entry: User wants to define stories and architecture for a feature.
If $BRAINSTORM_PATH is set (pipeline mode):
- Read the brainstorm document at
$BRAINSTORM_PATH - Extract: chosen approach, key decisions, constraints, open questions
- Announce: "Reading brainstorm: [filename]. Extracting decisions."
- Skip to Phase 2
If no env var (standalone mode):
- Check
docs/brainstorms/for a recent match (last 14 days) - If found: Use AskUserQuestion (header: "Brainstorm", question: "Found brainstorm: [title]. Use this as input?") with options: "Yes, use it" and "Different input"
- If not found: Use AskUserQuestion (header: "Feature", question: "What are you building? Describe the feature, problem, or goal.") — accept free text
Exit: Feature context understood — decisions extracted or gathered from user.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2mo ago First seen · 221 lines · 58 tokens per session scan A 6db687f793fc
architect is a skill published in the GitHub repository ondrej-svec/heart-of-gold-toolkit (19 stars, last pushed 1mo ago), licensed MIT. It adds 58 tokens to every session and 1,872 once invoked, about $0.0002 per session on Opus 5.5. 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.
architect compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| architectondrej-svec/heart-of-gold-toolkit | Skill | 19 | 1mo ago | MIT | A | 58 | Claude Code |
| imagegenopenai/codex | Skill | 134k | today | Apache-2.0 | A | 113 | Codex |
| playwright-climicrosoft/playwright | Skill | 99k | today | Apache-2.0 | A | 19 | Claude Code |
| local-ai-agentsmicrosoft/ai-agents-for-beginners | Skill | 79k | today | MIT | A | 200 | Claude Code, Codex |
| systematic-debuggingobra/superpowers | Skill | 314k | 3d ago | MIT | A | 21 | Claude Code |
| next-cache-components-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 95 | Claude Code |
| next-partial-prefetching-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 103 | Claude Code |