---
license: mit
pretty_name: "Misata EdTech Practice Evalpack (declared learning curve)"
tags:
  - synthetic
  - text-to-sql
  - evaluation
  - data-agents
  - tabular
  - sql
task_categories:
  - table-question-answering
configs:
  - config_name: students
    data_files: "tables/students.csv"
  - config_name: practice_attempts
    data_files: "tables/practice_attempts.csv"
---

# Misata EdTech Practice Evalpack (declared learning curve)

An **evalpack**: an evaluation database generated from the answer key, not
annotated after the fact. A VLDB 2026 audit found 52.8% of BIRD Mini-Dev
answer keys wrong because benchmarks annotate answers onto existing
databases; this dataset inverts the order. The declared properties (curves,
shares, identities) are the specification, the database is generated to
satisfy them exactly, and every shipped question was re-verified by
executing its gold SQL against these exact files with DuckDB, an engine
that shares no code with the generator.

## What is in it

Tables: students (600 rows), practice_attempts (15,000 rows).

A practice log where the monthly correct rate climbs 55% to 68% by
declaration and total practice time per month is declared and exact. Every
attempt belongs to a student who exists and happens after that student
signed up. 17 questions ship; 4 candidates whose rates were unachievable at
the generated row counts were dropped by the verification gate rather than
shipped wrong (that refusal is the point).

## Files

- `tables/*.csv`: the database
- `questions.jsonl`: one verified question per line (natural language,
  gold SQL, expected answer, tags)
- `certificate.json`: per-question DuckDB verification plus FK proof
- `manifest.json`: spec hash, seed, library versions, dropped candidates
- `verify.py`: standalone re-verification (needs only `pip install duckdb`)
- `schema.misata.yaml`: the full declaration; regenerate or rotate the pack
  from it

## Re-verify in thirty seconds

```bash
pip install duckdb
python verify.py
```

## Rotate the environment without touching the answer key

```bash
pip install misata
misata evalpack --config schema.misata.yaml -o rotated_pack --seed 7
```

A new seed replaces the rows; the declared answers stay the answers, so
agents cannot memorize the environment. Same version + same schema + same
seed reproduces these bytes exactly.

## Provenance

No real data: fully declaration-generated, offline, deterministic
([provenance statement](https://github.com/rasinmuhammed/misata/blob/main/DATA-PROVENANCE.md)).
Generated with [misata](https://github.com/rasinmuhammed/misata) (MIT).
Where the approach fails is documented in
[LIMITATIONS.md](https://github.com/rasinmuhammed/misata/blob/main/LIMITATIONS.md).