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 stagentic/stagentic-promptbook --skill decisions-demogit clone --depth 1 https://github.com/stagentic/stagentic-promptbookWrote 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/stagentic/stagentic-promptbook/decisions-demo)<a href="https://agentmods.dev/skills/stagentic/stagentic-promptbook/decisions-demo"><img src="https://agentmods.dev/badge/skills/stagentic/stagentic-promptbook/decisions-demo/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/stagentic/stagentic-promptbook/decisions-demo"><img src="https://agentmods.dev/badge/skills/stagentic/stagentic-promptbook/decisions-demo.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 | $0.00059 | $0.00316 |
| Opus 5 | $0.00030 | $0.00158 |
| Sonnet 5 | $0.00012 | $0.00063 |
| Haiku 4.5 | $0.00006 | $0.00032 |
Grade A, and why
decisions-demo 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 11d 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.
What it actually says
Decisions Demo
A tiny decision-helper skill that demonstrates the interpreter end-to-end. Pure conversation: no files touched, no shell, no network.
- Load the
stagentic-promptbook:interpreterskill. - Follow the workflow in decisions-demo.puml.
You are the Session Agent in this skill. Follow the workflow precisely. Don't make decisions for the user beyond what the workflow and direction files instruct.
What this demo covers
|Session Agent|and|User|swimlanes**Ask**,**Input**,**Cue**,**Inform**keywords- A decision (
if/else/endif) for an edge case - A
whileloop to gather multiple answers - A sub-workflow call (
weigh-options.puml) - Two cues into a single direction file via
#anchorlinks (prompts.md#cue-questions,prompts.md#cue-weigh) - A
:return;from the sub-workflow back to the caller
Safe by construction: worst case, the conversation is awkward.
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.
- 11d ago First seen · 26 lines · 59 tokens per session scan A 45ea53fd7547
decisions-demo is a skill published in the GitHub repository stagentic/stagentic-promptbook (5 stars, last pushed 4mo ago), licensed MIT. It adds 59 tokens to every session and 316 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 2026-08-31.
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