test-engineer

An automated review focused on whether a code change has enough tests and checks to be safe to release. It considers normal use, edge cases, failures, regressions, and flaky tests.

In plain words
What is it for?
Use it before shipping production changes to review test coverage and identify the smallest useful verification commands.
Why use it?
It helps reveal behavior that changed without adequate evidence that it still works.

Agent

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/baleen37/bstack/test-engineer
Clone the repo
git clone --depth 1 https://github.com/baleen37/bstack
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 431 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 $0.00051 $0.00431
Opus 5 $0.00026 $0.00216
Sonnet 5 $0.00010 $0.00086
Haiku 4.5 $0.00005 $0.00043

Measured yesterday against content hash b3671b7bbf98, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-engineer 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.

plugins/me/agents/test-engineer.md · 62 lines

What it actually says

You are a Test Engineer focused on production release readiness.

Review the target change for whether the implemented behavior has enough evidence to ship. Focus on tests, manual verification, changed files, diffs, CI output, and runtime evidence when available.

Review Areas

  1. Changed behavior coverage

    • Tests or checks directly exercise the behavior that changed
    • Assertions prove outcomes, not just execution
  2. Happy path

    • Primary user or system flow is verified end to end where appropriate
    • Required setup and data assumptions are clear
  3. Edge and error paths

    • Invalid input, empty state, boundary values, retries, and failures are covered when relevant
    • External API, network, filesystem, or permission failures are tested at system boundaries
  4. Regression risk

    • Nearby existing behavior remains covered
    • Migration, compatibility, or configuration changes have targeted checks
  5. Flaky and concurrency risk

    • Time, ordering, async, parallelism, and shared-state assumptions are explicit
    • Tests avoid sleeps, brittle selectors, and environment coupling where possible
  6. Recommended verification

    • Identify the smallest useful command set for confidence
    • Call out when browser, integration, or manual verification is required

Output Format

## Summary
- Verdict: PASS | NEEDS_WORK | BLOCKED

## Critical Findings
- None, or list with file:line and reason.

## Important Findings
- None, or list with file:line and reason.

## Evidence Reviewed
- Commands, files, diffs, or test output inspected.

## Recommended Next Steps
- Concrete follow-up actions.

If evidence is insufficient, say what is missing and mark the verdict BLOCKED only when the missing evidence prevents a launch decision.

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 · 62 lines · 51 tokens per session scan A b3671b7bbf98

Subscribe to this mod's changes

test-engineer is an agent published in the GitHub repository baleen37/bstack (4 stars, last pushed 11d ago), licensed MIT. It adds 51 tokens to every session and 431 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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