dsh-eval-regression

A small, deterministic regression-evaluation plugin for DeepSeek Harness.

It registers evaluate_golden_output, a model-callable tool that compares supplied candidate output against required and forbidden fragments. It does not call a model, persist data, or claim semantic correctness. Its job is repeatable pass/fail evidence, not vibes-based architecture in a trench coat.

Why

Agent changes routinely regress answers that appear superficially acceptable. A stable corpus of expected fragments gives a cheap, transparent signal for release smoke tests and replayed transcripts:

• required fragments catch omissions
• forbidden fragments catch known bad claims or unsafe fallbacks
• per-case reports make failures reviewable
• deterministic scoring is suitable for CI thresholds

Install as a DSH plugin

dsh plugin --profile <profile> add github:aryswisnu/dsh-eval-regression

The package is a DSH bundle. Its cordis.patch.yml registers the tool automatically after the profile's base tool runtime.

For local development:

git clone https://github.com/aryswisnu/dsh-eval-regression.git
cd dsh-eval-regression
npm install
npm run build
dsh plugin --profile <profile> add .

Run a version-controlled suite in CI

The plugin also ships a small CLI. It reads a JSON suite, prints an evaluation report to stdout, exits 0 when every case passes, exits 1 when any case fails, and exits 2 for invalid input or usage errors.

{
  "suite": "release-smoke",
  "cases": [
    {
      "id": "grounded-answer",
      "actual": "The result is 42. Source: benchmark.csv",
      "includes": ["42", "Source:"],
      "excludes": ["I cannot verify"]
    }
  ]
}

npx dsh-eval-regression suites/release-smoke.json
# or, from this repository:
npm run evaluate -- suites/release-smoke.json

The report includes total passed and failed cases, a 0..1 score, and case-level missing or forbidden fragments. This makes the evaluation corpus ordinary, reviewable source code and makes a failed expectation fail the CI job.

Tool example

{
  "suite": "release-smoke",
  "cases": [
    {
      "id": "grounded-answer",
      "actual": "The result is 42. Source: benchmark.csv",
      "includes": ["42", "Source:"],
      "excludes": ["I cannot verify"]
    }
  ]
}

The canonical result includes total passed and failed cases, a 0..1 score, and each case's missing or forbidden fragments.

Boundaries

This is intentionally a narrow deterministic evaluator. It does not replace model-quality review, factual grounding, tool execution checks, or snapshot replay. Use it as one gate in an evaluation harness, then add stronger signals where the product needs them.

Development

npm install
npm test
npm run typecheck
npm run build

MIT License.