scenario-design

scenario-design is a skill for Claude Code, Codex from BlackBeltTechnology/pi-agent-dashboard. It costs 88 tokens per session (2,839 once invoked), scanned A, original, MIT.

A test-scenario design workflow that turns a change specification into concrete, adversarial test cases. Each case defines the input, the action that triggers it, and the observable result.

In plain words
What is it for?
Use it to create a standalone test-plan.md with scenarios assigned to suitable test levels, while raising clarification questions when the specification lacks concrete information.
Why use it?
It exposes missing details in a specification and considers edge cases, performance, interface quirks, and error handling instead of checking only the normal path.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

Good fit Use it to create a standalone test-plan.md with scenarios assigned to suitable test levels, while raising clarification questions when the specification lacks concrete information.

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Install with agentmods
npx agentmods add skills/blackbelttechnology/pi-agent-dashboard/scenario-design
Install

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.

Any agent
npx skills add BlackBeltTechnology/pi-agent-dashboard --skill scenario-design
Clone the repo
git clone --depth 1 https://github.com/BlackBeltTechnology/pi-agent-dashboard

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for scenario-design

README.md
[![agentmods](https://agentmods.dev/badge/skills/blackbelttechnology/pi-agent-dashboard/scenario-design/github.svg)](https://agentmods.dev/skills/blackbelttechnology/pi-agent-dashboard/scenario-design)
Your own site
<a href="https://agentmods.dev/skills/blackbelttechnology/pi-agent-dashboard/scenario-design"><img src="https://agentmods.dev/badge/skills/blackbelttechnology/pi-agent-dashboard/scenario-design/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.

agentmods 80×15 button for scenario-design

Your own site · 80×15
<a href="https://agentmods.dev/skills/blackbelttechnology/pi-agent-dashboard/scenario-design"><img src="https://agentmods.dev/badge/skills/blackbelttechnology/pi-agent-dashboard/scenario-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,839 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00088 $0.02839
Opus 5 $0.00044 $0.01419
Sonnet 5 $0.00018 $0.00568
Haiku 4.5 $0.00009 $0.00284

Measured 11d ago against content hash dc18e29298f6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

scenario-design 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.

packages/eng-disciplines/.pi/skills/scenario-design/SKILL.md · 223 lines

How it starts

The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Turn a change spec into adversarial, real-life test scenarios — designed to break the system, not confirm it works. A scenario is only as good as it is concrete and executable. If the spec can't supply the concrete bits, that is a spec defect, surfaced as a clarification — not a guess.

Input: A change/feature spec. --change <name> (OpenSpec), or infer from context / point the skill at any spec doc. Mode: --stage proposal|design|apply (default: infer — see Gate). Output: a standalone test-plan.md catalog written to your change/spec's test-plan location (OpenSpec: openspec/changes/<name>/test-plan.md).


Core mechanism — the Triple

Every scenario MUST resolve three concrete slots:

   ┌─────────────┬──────────────────────┬────────────────────────────┐
   │  INPUT      │  TRIGGER             │  EXPECTED OBSERVABLE OUTCOME │
   │  concrete   │  the condition /     │  a measurable, visible fact  │
   │  data /     │  action that fires   │  (status, value, latency,    │
   │  state      │  the behaviour       │   DOM, log line, exit code)  │
   └─────────────┴──────────────────────┴────────────────────────────┘

Rule (from spec-coding edge-case practice): if any slot is a verb without a noun, or an adjective instead of a number, the slot is unfillable → spec gap. "Handles errors gracefully" is not a Triple. "POST /api/restart while server already restarting (input) → second caller (trigger) → receives 409 within 500ms, no second orchestrator spawned (observable)" is.

Stance: falsify, don't confirm. For each requirement, the job is to find the input+trigger that makes the observable wrong. Happy path is table stakes; the scenario value is in the boundaries and failures.


Phase 1 — Read the spec, classify requirements

  1. Read what exists (OpenSpec layout shown; in a non-OpenSpec project read whatever spec/design/task docs the user points at — do not fail on a missing openspec/ dir or CLI):
    • openspec/changes/<name>/proposal.md (always)
    • openspec/changes/<name>/design.md (if present — decisions, invariants)
    • openspec/changes/<name>/specs/**/spec.md (requirement deltas)
    • openspec/changes/<name>/tasks.md (if present — to align section numbers)

Read the full file on GitHub · 223 lines

Files

What ships with it

2 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.

Changes

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.

  1. 11d ago First seen · 223 lines · 88 tokens per session scan A dc18e29298f6

Subscribe to this mod's changes

scenario-design is a skill published in the GitHub repository BlackBeltTechnology/pi-agent-dashboard (279 stars, last pushed today), licensed MIT. It adds 88 tokens to every session and 2,839 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.