Test gap filler

On the schedule you choose, the agent finds the untested behaviours that matter, backfills coverage one slice at a time in your conventions, self-reviews, and drafts a PR — so coverage keeps rising without a human writing every test.

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What it installs

Agents 1

  • Coding Agent

    Backfills behaviour-level test coverage and drafts a pull request for approval.

Workflows 1

  • Fill test gaps

    Find the behaviours that matter, backfill them in vertical slices, self-review, and draft a PR.

Goals 1

  • Coverage rising

    Coverage of critical-path behaviour increases over time, with a green suite.

Skills 3

  • test-scenarios

    Turn each behaviour into an explicit test scenario — objective, starting conditions, role, step-by-step actions, observable outcomes, and edge cases — before writing the assertion. Adapted from phuryn/pm-skills/test-scenarios.

  • tdd

    Test-first discipline applied to backfilling coverage: vertical slices over horizontal, behaviour over implementation, one red-green cycle at a time, refactor only when green. Adapted from mattpocock/skills/tdd.

  • qa

    Quality-assurance reading of the codebase to find what is genuinely untested and user-facing, framed as durable behaviour rather than implementation. Adapted from mattpocock/skills/qa.

Schedules 1

  • Fill test gaps

    Finds untested behaviours and drafts coverage on the schedule you choose.

Requirements

What this template expects to do its job. Task Machine does not verify these — you decide whether your setup is ready.

  • Connected repository — Needs a connected code repository so the agent can read the source, the existing test suite, and run the project's checks while it backfills coverage.

Get started

Install Test gap filler and run it with approvals.

Join the waitlist and we will send early access when the first private beta spots open.

Private beta. We invite teams in batches and never share your email.