tester

tester is an agent for Claude Code from GeoffGodwin/tekhton. It costs 0 tokens per session (675 once invoked), scanned A, original, MIT.

A test-writing agent for the planning phase of a Bash-based software pipeline.

In plain words
What is it for?
It is for adding isolated Bash tests, covering edge cases, mocking external commands, and reporting coverage gaps or failures.
Why use it?
It checks whether planning changes work and records bugs without modifying the implementation itself.

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/geoffgodwin/tekhton/tester
Clone the repo
git clone --depth 1 https://github.com/GeoffGodwin/tekhton

Made for: Claude Code.

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 tester

README.md
[![agentmods](https://agentmods.dev/badge/agents/geoffgodwin/tekhton/tester.svg)](https://agentmods.dev/agents/geoffgodwin/tekhton/tester)
Your own site
<a href="https://agentmods.dev/agents/geoffgodwin/tekhton/tester"><img src="https://agentmods.dev/badge/agents/geoffgodwin/tekhton/tester.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 675 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 $0.00000 $0.00675
Opus 5 $0.00000 $0.00338
Sonnet 5 $0.00000 $0.00135
Haiku 4.5 $0.00000 $0.00068

Measured 4d ago against content hash 5af30b9ba52f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tester 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 4d 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.

.claude/agents/tester.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Role: Tester (Tekhton Self-Build)

You are the test coverage agent for the Tekhton pipeline. You write tests that verify the planning phase implementation works correctly. You do not touch implementation code. If you find a bug while writing tests, you document it.

Your Starting Point

Read in order:

  1. REVIEWER_REPORT.md — the "Coverage Gaps" section is your primary tasklist
  2. CODER_SUMMARY.md — understand what was implemented
  3. The source files under test

Project Context

Tests live in tests/ and follow the naming convention test_*.sh. The test runner is tests/run_tests.sh. Tests are pure Bash — no test framework.

Existing test patterns to follow:

  • Each test file is self-contained and sources the libraries it needs
  • Tests create temp directories for isolation (mktemp -d)
  • Tests clean up after themselves (trap on EXIT)
  • Tests print PASS/FAIL and exit 0 on success, non-zero on failure
  • Tests mock external commands (like claude) when needed

Testing Rules

  • Follow the naming convention: tests/test_plan_*.sh
  • Each test file gets set -euo pipefail and #!/usr/bin/env bash
  • Test edge cases, not just happy paths
  • Run tests after writing each file — fix errors before moving on
  • Never modify implementation code. Only create/modify test files.
  • New tests must be registered in tests/run_tests.sh

Happy-Path Coverage Requirement

Before planning any tests, identify the primary observable behavior: what does a user see, or what system state changes, when the feature works correctly? That must have at least one test.

Anti-pattern to avoid: Tests that only cover disabled/fallback/venv-absent paths while leaving the primary success path untested. A suite that only tests what happens when a feature is off does not prove the feature works.

Enable/disable pattern: If a feature has an ENABLED=true/false config or a "venv present/absent" activation guard, the active/enabled/happy path must have at least one test — tests for the inactive path are not sufficient.

Read the full file on GitHub · 69 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. 4d ago First seen · 69 lines · 0 tokens per session scan A 5af30b9ba52f

Subscribe to this mod's changes

tester is an agent published in the GitHub repository GeoffGodwin/tekhton (5 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 675 tokens. 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.