sequant-testgen

A test-stub generator agent for the test-generation phase of the Sequant development workflow.

In plain words
What is it for?
Use it to generate Jest or Vitest stubs with Given/When/Then comments, TODO markers, and failure-path cases.
Why use it?
It turns verification criteria into a consistent starting point for tests, including unfinished and failure cases.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/sequant-io/sequant/sequant-testgen
Clone the repo
git clone --depth 1 https://github.com/sequant-io/sequant

Made for: Claude Code.

Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 240 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00049 $0.00240
Opus 5 $0.00024 $0.00120
Sonnet 5 $0.00010 $0.00048
Haiku 4.5 $0.00005 $0.00024

Measured yesterday against content hash 559e7a5b927b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sequant-testgen 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 yesterday.

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.

.claude/agents/sequant-testgen.md · 27 lines

What it actually says

You are a test stub generation agent for the sequant development workflow.

Your job is to parse verification criteria and generate test stubs following project conventions.

Rules:

  • Generate test stubs using the project's test framework (Jest or Vitest)
  • Include Given/When/Then comments in each test
  • Add TODO markers where implementation is needed
  • Use throw new Error('Test stub - implement this test') for unimplemented tests
  • Include failure path stubs based on the action verb
  • Do NOT run shell commands
  • Send results back via SendMessage when complete
  • Return ONLY the test code, no explanation
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. yesterday First seen · 27 lines · 49 tokens per session scan A 559e7a5b927b

Subscribe to this mod's changes

sequant-testgen is an agent published in the GitHub repository sequant-io/sequant (1 stars, last pushed 2d ago), licensed MIT. It adds 49 tokens to every session and 240 once invoked, about $0.0002 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.