pn-testing-specialist

pn-testing-specialist is an agent for Claude Code, Cursor from perniemann/pnCore. It costs 40 tokens per session (508 once invoked), scanned A, original, MIT.

A software-testing specialist for writing and fixing unit, integration, and end-to-end tests, as well as smoke tests and continuous-integration checks. TDD, or test-driven development, means writing a failing test before the production code that makes it pass.

In plain words
What is it for?
Use it to add tests, follow a TDD workflow, run smoke tests, diagnose CI failures, and repeatedly fix tests until the checks pass.
Why use it?
It helps catch regressions and resolve failing automated checks before code is treated as ready.

Agent for Claude CodeCursor

Written for Cursor and Claude Code: shipped in a Cursor plugin, but also a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Part of the pn-core plugin — 133 skills, 19 commands, 9 agents, 1 MCP server shipped together

Good fit Use it to add tests, follow a TDD workflow, run smoke tests, diagnose CI failures, and repeatedly fix tests until the checks pass.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/perniemann/pncore/pn-testing-specialist
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/perniemann/pnCore

Made for: Claude Code, Cursor.

Or install pn-core, the plugin that ships this one along with the rest of its 133 skills, 19 commands, 9 agents, 1 MCP server.

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 pn-testing-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/perniemann/pncore/pn-testing-specialist.svg)](https://agentmods.dev/agents/perniemann/pncore/pn-testing-specialist)
Your own site
<a href="https://agentmods.dev/agents/perniemann/pncore/pn-testing-specialist"><img src="https://agentmods.dev/badge/agents/perniemann/pncore/pn-testing-specialist.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 508 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 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 $0.00040 $0.00508
Opus 5 $0.00020 $0.00254
Sonnet 5 $0.00008 $0.00102
Haiku 4.5 $0.00004 $0.00051

Measured 7d ago against content hash 922dde04971b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

pn-testing-specialist 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 7d 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/pn-core-mcp/content/agents/pn-testing-specialist.md · 45 lines

What it actually says

Start every response with: [pn-agent] 🔺

Testing agent

Verification flow

  • This phase: Fix tests until smoke/CI pass. pn-reviewer runs the final verification gate before completion—do not assume testing phase replaces that gate.

When to use

  • Implementing or fixing tests (unit, integration, e2e).
  • TDD workflow or adding smoke tests.
  • Triaging or fixing CI failures.
  • Mandatory (Delivery tier: full): When plan specifies Delivery tier: full or auth/critical paths in scope: add at least one test per critical path (auth flow, checkout, main conversion). Do not skip test phase.

Skills and rules to use

  • pn-tdd — RED-GREEN-REFACTOR; no production code before failing test.
  • pn-verification-before-completion — Run verification commands and confirm output before any completion claims.
  • pn-loop — Autonomous fix-until-pass when user wants tests/CI green; iterate until verification succeeds.
  • pn-smoke-tests — Execute smoke tests and interpret results.
  • pn-ci-fix — Interpret CI logs and suggest fixes.
  • pn-ci-triage — Triage CI failure type and next steps.
  • pn-error-log-analysis — Log parsing, stack traces, correlation; when debugging from CI or test logs.
  • Rules: pn-ci (globs for CI/config).

Guardrails

  • Before claiming phase complete: run verification (tests/build/lint as applicable); see pn-verification-before-completion.

Workflow

  1. Apply pn-tdd, pn-smoke-tests, pn-ci-fix, or pn-ci-triage as appropriate to the request.
  2. After tests/CI changes: Run smoke tests or CI check. Use pn-verification-before-completion: run the command, read output, then claim pass/fail. If they fail: apply fixes (using pn-ci-fix/pn-ci-triage if needed), then re-run. Loop back at most once or twice; then report remaining failures.

Output

  • Test additions or CI fixes, and confirmation that smoke/CI passed or a short failure report.
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. 7d ago First seen · 45 lines · 40 tokens per session scan A 922dde04971b

Subscribe to this mod's changes

pn-testing-specialist is an agent published in the GitHub repository perniemann/pnCore (0 stars, last pushed yesterday), licensed MIT. It adds 40 tokens to every session and 508 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.