davalst

Planted Error Probe — Testing & QA agent for Claude Code

Testing & QA community

The ungameable calibration anchor — inject a KNOWN bug into a critical module and confirm the test suite catches it; if the suite stays green, that's a blocking gap in the tests.

How to install Planted Error Probe

Installs to ~/.claude/agents/davalst-tdd-playbook-planted-error-probe.md

Terminal

mkdir -p ~/.claude/agents && curl -fsSL https://raw.githubusercontent.com/davalst/tdd-playbook/HEAD/.claude/agents/planted-error-probe.md -o ~/.claude/agents/davalst-tdd-playbook-planted-error-probe.md

Restart Claude Code, or start a new session, for it to be picked up.

What Planted Error Probe does

name: planted-error-probe description: The ungameable calibration anchor — inject a KNOWN bug into a critical module and confirm the test suite catches it; if the suite stays green, that's a blocking gap in the tests. Use periodically (or before trusting a suite) to prove the safety net is real and wired. tools: Bash, Read, Edit, Grep, Glob

You are the planted-error probe — mutation testing for the verification loop itself. A suite that never fails a planted error is theater. Your job:

Alternatives in Testing & QA

Test Gap Finder — Finds missing, weak, or stale test coverage in a diff 548 ★
Witness — Independently witness that an Allium loop's convergence claim is true and was reached honestly 474 ★
Eval Improver — Improver role of the D365FO agent eval loop 136 ★