APST Starter Kit

APST stands for Accelerated Prompt Stress Testing. It is a depth-oriented LLM safety and reliability evaluation workflow that repeatedly samples the same prompts under controlled conditions to estimate empirical failure probability under repeated inference.

This v0.1 starter kit is local-first and conference-friendly. You can run the mock demo without an API key, then swap in OpenAI, Together.ai, or an OpenAI-compatible local endpoint when you are ready to test a real model.

Quickstart

Install from PyPI after the first release:

pip install apst-starter-kit
apst init my-apst-demo
cd my-apst-demo

apst run --config configs/demo_mock.yaml
apst report --results outputs/demo_results.csv --lang both

Or run from a Git checkout:

git clone <repo-url>
cd apst-starter-kit
pip install -e .

apst run --config configs/demo_mock.yaml
apst report --results outputs/demo_results.csv --lang both

The demo writes:

• outputs/demo_results.csv
• outputs/demo_results.json
• outputs/demo_results_report_both.md

What The Demo Does

The mock run:

• loads a small prompt set from data/prompts/demo_prompts.json
• repeatedly samples each prompt at two temperatures
• judges every response with the local rule judge mode
• computes APST reliability and repeated-use risk metrics
• exports CSV and JSON result files
• generates English, Chinese, or bilingual Markdown reports

No API key or network access is required for configs/demo_mock.yaml.

Configuring Models

Use the mock provider for local demos:

models:
  - name: mock-apst-model
    model_id: mock-apst-model
    provider: mock
judge_mode: rule

Use OpenAI with an LLM judge:

export OPENAI_API_KEY=...
apst run --config configs/openai_example.yaml

Use an OpenAI-compatible local endpoint, such as Ollama or vLLM exposing /v1/chat/completions. APST uses the same client path for both: model, base_url, and a placeholder api_key. With a local base_url, prompts, outputs, and labels are sent only to the local server you configured.

models:
  - model: llama3.1
    base_url: http://localhost:11434/v1
    api_key: local-not-needed
judge_mode: rule

The OpenAI-compatible client is installed with the base package, so Ollama and vLLM only need the local server running:

apst run --config configs/ollama_local.yaml
apst run --config configs/vllm_local.yaml

For local LLM-as-judge, point judge_model at another OpenAI-compatible local server:

judge_mode: llm
judge_model:
  model: llama3.1
  base_url: http://localhost:11434/v1
  api_key: local-not-needed

See docs/local_model_servers.md for Ollama and vLLM server commands.

Together.ai models are also supported through the existing provider extra:

pip install -e ".[providers]"
export TOGETHER_API_KEY=...
apst run --config configs/openai_example.yaml --models meta-llama/Llama-3.3-70B-Instruct-Turbo

Judge Modes

• rule: local deterministic checks for refusal, harmful operational guidance, crisis-support handling, and gibberish. Good for demos, local LLMs, and fast smoke tests.
• heuristic: local malformed-output check only. Good when you want a very conservative no-network sanity pass.
• llm: LLM-as-judge classification using judge_model. Good for richer audits and real model comparisons.

APST Metrics

Each prompt/model/temperature config reports:

• empirical_failure_probability: observed failures divided by repeated samples
• reliability: 1 - empirical_failure_probability
• apst_risk_at_10: estimated chance of at least one failure across 10 independent attempts
• failure_probability_ci_low and failure_probability_ci_high: Wilson interval bounds
• failure_mode_distribution: counts by judge label

The repeated-use estimate is intentionally simple:

Risk@N = 1 - (1 - empirical_failure_probability)^N

Reports

apst report --results outputs/demo_results.csv --lang en
apst report --results outputs/demo_results.csv --lang zh
apst report --results outputs/demo_results.csv --lang both

Use --audit-contact to put a real intake link, email address, or conference note in the report. See docs/enterprise_audits.md for the enterprise audit handoff text.

Legacy Commands

The older llm-eval entry point and APST/AIRBench commands are still available:

llm-eval run-apst --config configs/smoke.yaml
llm-eval freeze-airbench --region us --per-l4 5 --output data/prompts/airbench_us_v1.json

Local Checks

pytest

Publishing

See docs/publishing.md for GitHub release and PyPI publishing steps. The package includes an apst init command so PyPI users can scaffold the runnable configs, prompt files, and docs without cloning the repository.