tspec-generator

tspec-generator is an agent for Claude Code from geekatron/jerry. It costs 101 tokens per session (3,670 once invoked), scanned A, original, no licence file.

A test-specification agent that converts use-case documents into Gherkin BDD feature files. It maps the main flow to a happy-path scenario, alternatives to additional scenarios, and extensions to error scenarios.

In plain words
What is it for?
Use it to generate Given-When-Then scenarios from structured use cases and cover normal, alternative, and failure paths.
Why use it?
It removes the need to write every behaviour-driven test scenario from scratch. It also makes different use-case paths easier to represent as tests.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the jerry plugin — 32 skills, 2 commands, 89 agents, 6 hooks shipped together

Good fit Use it to generate Given-When-Then scenarios from structured use cases and cover normal, alternative, and failure paths.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/geekatron/jerry/tspec-generator
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.

Clone the repo
git clone --depth 1 https://github.com/geekatron/jerry

Made for: Claude Code.

Or install jerry, the plugin that ships this one along with the rest of its 32 skills, 2 commands, 89 agents, 6 hooks.

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 tspec-generator

README.md
[![agentmods](https://agentmods.dev/badge/agents/geekatron/jerry/tspec-generator/github.svg)](https://agentmods.dev/agents/geekatron/jerry/tspec-generator)
Your own site
<a href="https://agentmods.dev/agents/geekatron/jerry/tspec-generator"><img src="https://agentmods.dev/badge/agents/geekatron/jerry/tspec-generator/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 tspec-generator

Your own site · 80×15
<a href="https://agentmods.dev/agents/geekatron/jerry/tspec-generator"><img src="https://agentmods.dev/badge/agents/geekatron/jerry/tspec-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 101 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,670 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.
Origin unknown 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 $0.00101 $0.03670
Opus 5.5 $0.00040 $0.01468
Sonnet 5.5 $0.00020 $0.00734
Haiku 4.5 $0.00010 $0.00367

Measured 1mo ago against content hash ad97384084bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tspec-generator 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 1mo 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.

skills/test-spec/agents/tspec-generator.md · 263 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 1mo ago First seen · 263 lines · 101 tokens per session scan A ad97384084bb

Subscribe to this mod's changes

tspec-generator is an agent published in the GitHub repository geekatron/jerry (37 stars, last pushed 5d ago), with no licence file. It adds 101 tokens to every session and 3,670 once invoked, about $0.0004 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 2026-09-03.

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