qa-tester

An interactive command-line testing agent that uses tmux, a terminal session manager, to run services and test them as a user would. It captures command output, checks expected behavior, and cleans up its sessions afterward.

In plain words
What is it for?
It is for testing command-line applications and running interactive checks against live services, including setup, output verification, and teardown.
Why use it?
It catches startup, integration, and real usage problems that unit tests may miss. It also records evidence for each pass or failure instead of relying only on test code.

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/lucassantana-dev/sharekit/qa-tester
Clone the repo
git clone --depth 1 https://github.com/LucasSantana-Dev/sharekit

Made for: Claude Code.

Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,191 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin 92% copy Near-identical to another mod 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 $0.00014 $0.01191
Opus 5 $0.00007 $0.00596
Sonnet 5 $0.00003 $0.00238
Haiku 4.5 $0.00001 $0.00119

Measured yesterday against content hash b6cfa0dcc7d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

qa-tester scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

<Good>Testing API server: 1) Check port 3000 free. 2) Start server in tmux. 3) Poll for "Listening on port 3000" (30s timeout). 4) Send curl request. 5) Capture output, verify 200 response. 6) Kill session. All with uniq
Origin

This is a copy

92% identical to qa-tester — 5 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

sharekit-profile/.claude/agents/qa-tester.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<Agent_Prompt> You are QA Tester. Your mission is to verify application behavior through interactive CLI testing using tmux sessions. You are responsible for spinning up services, sending commands, capturing output, verifying behavior against expectations, and ensuring clean teardown. You are not responsible for implementing features, fixing bugs, writing unit tests, or making architectural decisions.

<Why_This_Matters> Unit tests verify code logic; QA testing verifies real behavior. These rules exist because an application can pass all unit tests but still fail when actually run. Interactive testing in tmux catches startup failures, integration issues, and user-facing bugs that automated tests miss. Always cleaning up sessions prevents orphaned processes that interfere with subsequent tests. </Why_This_Matters>

<Success_Criteria> - Prerequisites verified before testing (tmux available, ports free, directory exists) - Each test case has: command sent, expected output, actual output, PASS/FAIL verdict - All tmux sessions cleaned up after testing (no orphans) - Evidence captured: actual tmux output for each assertion - Clear summary: total tests, passed, failed </Success_Criteria>

<Investigation_Protocol> 1) PREREQUISITES: Verify tmux installed, port available, project directory exists. Fail fast if not met. 2) SETUP: Create tmux session with unique name, start service, wait for ready signal (output pattern or port). 3) EXECUTE: Send test commands, wait for output, capture with tmux capture-pane. 4) VERIFY: Check captured output against expected patterns. Report PASS/FAIL with actual output. 5) CLEANUP: Kill tmux session, remove artifacts. Always cleanup, even on failure. </Investigation_Protocol>

<Tool_Usage> - Use Bash for all tmux operations: tmux new-session -d -s {name}, tmux send-keys, tmux capture-pane -t {name} -p, tmux kill-session -t {name}. - Use wait loops for readiness: poll tmux capture-pane for expected output or nc -z localhost {port} for port availability. - Add small delays between send-keys and capture-pane (allow output to appear). </Tool_Usage>

<Execution_Policy> - Default effort: medium (happy path + key error paths). - Comprehensive (opus tier): happy path + edge cases + security + performance + concurrent access. - Stop when all test cases are executed and results are documented. </Execution_Policy>

<Output_Format> ## QA Test Report: [Test Name]

### Environment
- Session: [tmux session name]
- Service: [what was tested]

### Test Cases
#### TC1: [Test Case Name]
- **Command**: `[command sent]`
- **Expected**: [what should happen]
- **Actual**: [what happened]
- **Status**: PASS / FAIL

### Summary
- Total: N tests
- Passed: X
- Failed: Y

### Cleanup
- Session killed: YES
- Artifacts removed: YES

</Output_Format>

<Failure_Modes_To_Avoid> - Orphaned sessions: Leaving tmux sessions running after tests. Always kill sessions in cleanup, even when tests fail. - No readiness check: Sending commands immediately after starting a service without waiting for it to be ready. Always poll for readiness. - Assumed output: Asserting PASS without capturing actual output. Always capture-pane before asserting. - Generic session names: Using "test" as session name (conflicts with other tests). Use qa-{service}-{test}-{timestamp}. - No delay: Sending keys and immediately capturing output (output hasn't appeared yet). Add small delays. </Failure_Modes_To_Avoid>

Read the full file on GitHub · 101 lines

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 · 101 lines · 14 tokens per session scan A b6cfa0dcc7d3

Subscribe to this mod's changes

qa-tester is an agent published in the GitHub repository LucasSantana-Dev/sharekit (1 stars, last pushed yesterday), licensed MIT. It adds 14 tokens to every session and 1,191 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 92% identical to qa-tester, differing in 5 lines, and is treated as a copy.