Han03430/stride-metadata-overlay

STRIDE Metadata Overlay

This repository contains the metadata overlay used to construct the reported STRIDE benchmark snapshot. It pairs 880 task identifiers from LiveCodeBench code_generation_lite, release release_v5, with the initial STRIDE constraint metadata assigned to those tasks.

Of the 880 records, 879 have complete canonical parameters. Task 3233 retains four constraint types and marks their canonical parameter values as missing.

The overlay is not a copy of LiveCodeBench. Obtain the upstream dataset under its own terms, then join it to this overlay with task_id == question_id. Do not use source_row as a primary key.

Files

Path	Rows	SHA-256	Contents
tasks/task_index.jsonl	880	84F739ADDED1577853C0FF778721ED8BC76587657C9EEE387615BE0FF2AFE54A	Upstream join identifiers, selected upstream metadata, release labels, and a reference fingerprint.
constraints/constraint_metadata.jsonl	880	8727A853C6D116FD43BD24BF453845DB8F526CEBCB53163065F31D24256CE026	STRIDE initial constraint types and their canonical parameters.

Both files use UTF-8 JSON Lines with one object per line. Each file contains 880 unique task_id values, and the two ID sets match.

Scope

The repository contains metadata only. It excludes:

• problem titles, statements, starter code, and public or hidden tests;
• prompts, model responses, generated programs, evaluation results, and model-level metrics;
• active feedback subsets from later repair turns and other fields derived from model outcomes.

You need the pinned LiveCodeBench release and the separate STRIDE experiment code to reconstruct the benchmark inputs and run evaluation.

Snapshot statistics and missing values

The constraint file contains 294 records with four constraints, 304 with six, and 282 with eight. It uses 26 constraint types.

Of the 880 records, 879 have complete initial parameters. Task 3233 retains four selected constraint types but lacks the canonical parameter values:

• keyword_function_not
• keyword_class_one
• keyword_variable_type
• coding_language

For this record, each corresponding initial_constraints[].parameters value is null, and instantiation_status is types_only_missing_parameters. No value was reconstructed from another run or from model outputs. An empty object ({}) has a different meaning: the constraint type takes no parameter in this schema.

Loading the local files

from datasets import load_dataset

tasks = load_dataset(
    "json",
    data_files="tasks/task_index.jsonl",
    split="train",
)
constraints = load_dataset(
    "json",
    data_files="constraints/constraint_metadata.jsonl",
    split="train",
)

assert len(tasks) == 880
assert len(constraints) == 880
assert set(tasks["task_id"]) == set(constraints["task_id"])

The Hugging Face repository exposes the two files as separate configurations, task_index and constraint_metadata, because their schemas differ.

Loading and joining LiveCodeBench

The reported snapshot uses LiveCodeBench code_generation_lite, release release_v5. The current datasets interface can load that fixed release as follows:

from datasets import load_dataset

tasks = load_dataset(
    "json",
    data_files="tasks/task_index.jsonl",
    split="train",
)
constraints = load_dataset(
    "json",
    data_files="constraints/constraint_metadata.jsonl",
    split="train",
)
upstream = load_dataset(
    "livecodebench/code_generation_lite",
    "release_v5",
    split="test",
)

upstream_by_id = {str(row["question_id"]): row for row in upstream}
task_by_id = {row["task_id"]: row for row in tasks}
constraint_by_id = {row["task_id"]: row for row in constraints}

selected_ids = set(task_by_id)
assert selected_ids == set(constraint_by_id)
assert selected_ids == set(upstream_by_id)

joined = [
    {
        "task_index": task_by_id[task_id],
        "constraints": constraint_by_id[task_id],
        "livecodebench": upstream_by_id[task_id],
    }
    for task_id in sorted(selected_ids)
]

LiveCodeBench updates its loader and usage instructions. Check the upstream dataset card if its loading interface changes. The semantic join remains task_id == question_id after converting question_id to a string. source_row records the 1-based extraction order from this snapshot. Use it for cross-checking only; row order is not a stable identifier.

Field reference: tasks/task_index.jsonl

Field	JSON type	Source	Meaning and rights boundary
schema_version	string	STRIDE	Version of this overlay schema.
source_dataset	string	STRIDE provenance field	Names the upstream dataset used for this snapshot.
source_version	string	STRIDE provenance field	Records the pinned upstream release, release_v5.
source_row	integer	STRIDE extraction metadata	1-based extraction order, from 1 through 880. It is not a join key.
task_id	string	Normalized upstream identifier	Matches LiveCodeBench question_id after string conversion. The authors do not claim ownership of the upstream identifier.
platform	string	Upstream metadata	Platform label copied from the selected LiveCodeBench row.
contest_id	string	Upstream metadata	Contest identifier copied from the selected LiveCodeBench row.
contest_date	string	Upstream metadata	ISO 8601 contest-date value copied from the selected LiveCodeBench row.
difficulty	string	Upstream metadata	Difficulty label copied from the selected LiveCodeBench row.
upstream_reference_sha256	string	STRIDE provenance field	SHA-256 reference fingerprint created during overlay extraction. It supports row cross-checking, does not contain the upstream row, and is not a join key.

Field reference: constraints/constraint_metadata.jsonl

Field	JSON type	Source	Meaning and rights boundary
schema_version	string	STRIDE	Version of this overlay schema.
source_row	integer	STRIDE extraction metadata	Matches the task-index extraction order for cross-checking.
task_id	string	Normalized upstream identifier	Foreign key to tasks/task_index.jsonl and LiveCodeBench question_id.
constraint_set_size	integer	STRIDE	Number of assigned initial constraints. It equals the lengths of constraint_types and initial_constraints.
constraint_types	array of strings	STRIDE	Constraint-type labels selected for the task during benchmark construction.
initial_constraints	array of objects	STRIDE	Instantiated initial constraints used by the STRIDE protocol.
initial_constraints[].type	string	STRIDE	Constraint-type label. It corresponds to an entry in constraint_types.
initial_constraints[].parameters	object or null	STRIDE	Type-specific canonical parameters. {} denotes a parameter-free type. null denotes missing canonical parameters and occurs only for the four entries of task 3233. The retained experiment code defines checker semantics for each type and parameter key.
instantiation_status	string	STRIDE	complete for 879 records; types_only_missing_parameters for task 3233.

License and upstream rights

The repository declares Creative Commons Attribution 4.0 International (CC BY 4.0). The license applies only to copyright and database rights that the STRIDE authors have authority to license, including:

• the selection and organization of this metadata overlay;
• the overlay schema, constraint taxonomy labels, task-level constraint assignments, canonical parameter instantiations, and documentation;
• author-created provenance metadata and reference fingerprints.

The license does not transfer rights in third-party material. Values sourced from LiveCodeBench, contest platforms, or other upstream sources remain subject to their applicable terms and rights. This repository does not apply CC BY 4.0 to omitted problem statements, starter code, tests, or other LiveCodeBench content. See LICENSE for the license notice and scope.

Citation

If you use this overlay, cite the associated paper and LiveCodeBench:

• Zhuoheng Han, Jin-Ge Yao, Zailong Tian, Xi Yang, and Houfeng Wang, Fragility Under Pressure: Evaluating the Iterative Stability of LLMs in Constrained Interactive Coding, COLM 2026.
• Naman Jain et al., LiveCodeBench: Holistic and Contamination Free Evaluation of Large Language Models for Code, arXiv:2403.07974.