Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Exponential-OS/prompt-engineering-in-action --skill teachmegit clone --depth 1 https://github.com/Exponential-OS/prompt-engineering-in-actionWrote 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/exponential-os/prompt-engineering-in-action/teachme)<a href="https://agentmods.dev/skills/exponential-os/prompt-engineering-in-action/teachme"><img src="https://agentmods.dev/badge/skills/exponential-os/prompt-engineering-in-action/teachme/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/exponential-os/prompt-engineering-in-action/teachme"><img src="https://agentmods.dev/badge/skills/exponential-os/prompt-engineering-in-action/teachme.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 | $0.00109 | $0.04155 |
| Opus 5 | $0.00055 | $0.02077 |
| Sonnet 5 | $0.00022 | $0.00831 |
| Haiku 4.5 | $0.00011 | $0.00415 |
Grade A, and why
teachme 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 9d 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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
12 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.
- growth.schema.json 9.5 KB
- techniques/alternative-approaches.md 6.7 KB
- techniques/audience-priming.md 6.2 KB
- techniques/chain-of-thought.md 6.1 KB
- techniques/constraint-injection.md 5.6 KB
- techniques/dialectic-tas.md 5.3 KB
- techniques/few-shot-by-example.md 6.2 KB
- techniques/flipped-interaction.md 6.0 KB
- techniques/meta-shortcut.md 6.2 KB
- techniques/role-priming.md 5.5 KB
- techniques/socratic-questioning.md 4.1 KB
- techniques/specificity-injection.md 4.4 KB
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.
- 9d ago First seen · 369 lines · 109 tokens per session scan A 5d5c21ca4d47
teachme is a skill published in the GitHub repository Exponential-OS/prompt-engineering-in-action (9 stars, last pushed 22d ago), licensed AGPL-3.0. It adds 109 tokens to every session and 4,155 once invoked, about $0.0005 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 2026-08-31.
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