context_files listlengths 96 96 | gold_output dict | metadata dict | prompt stringlengths 765 859 | rubric dict | task_id stringlengths 19 31 | task_name stringlengths 28 47 | world_id stringclasses 1
value |
|---|---|---|---|---|---|---|---|
[
"task_files/cb100-001-helios-forge/01_corporate/001_corporate_control_register.md",
"task_files/cb100-001-helios-forge/01_corporate/002_corporate_executed_instrument.txt",
"task_files/cb100-001-helios-forge/01_corporate/003_corporate_correspondence.eml",
"task_files/cb100-001-helios-forge/01_corporate/004_cor... | {
"advice_markdown": "# Counsel advice — Project Daybreak battery acquisition\n\n## Executive assessment\n\nFor Helios Forge, Inc. matter CB-MA-2401, the review identified 16 source-supported exceptions requiring action before 2026-09-04. The assessment concerns BluePeak Battery Systems LLC and the supplied record fo... | {
"benchmark": "CounselBench-100",
"code_license": "Apache-2.0",
"data_license": "CC-BY-4.0",
"deadline": "2026-09-04T00:00:00",
"document_count": 96,
"jurisdiction": "Delaware",
"matter_number": "CB-MA-2401",
"mcp_commit": "9a96ea6e5913736f92b88345bf51caeaaa8e719f",
"mcp_package": "@modelcontextproto... | You are buyer-side transactions counsel for Helios Forge, Inc. The partner responsible for this matter needs a defensible decision record before the next client call. A carve-out manufacturer owns cathode tooling in Nevada while its largest automaker customer can terminate upon an indirect change of control. Decision d... | {
"criteria": [
{
"category": "procedure",
"description": "Complete at least 46 successful, argument-specific evidence and output calls.",
"id": "procedure.minimum_successful_tool_calls"
},
{
"category": "procedure",
"description": "Find and read the 33 controlling, corrobora... | cb100-001-helios-forge | Project Daybreak battery acquisition | counselbench-filesystem-mcp-v2 |
[
"task_files/cb100-002-northstar-orbit/01_corporate/001_corporate_control_register.md",
"task_files/cb100-002-northstar-orbit/01_corporate/002_corporate_executed_instrument.txt",
"task_files/cb100-002-northstar-orbit/01_corporate/003_corporate_correspondence.eml",
"task_files/cb100-002-northstar-orbit/01_corpo... | {
"advice_markdown": "# Counsel advice — Project Sextant satellite software merger\n\n## Executive assessment\n\nFor Northstar Orbit plc matter CB-MA-2402, the review identified 16 source-supported exceptions requiring action before 2026-09-08. The assessment concerns Aster Vale Navigation Corp. and the supplied reco... | {
"benchmark": "CounselBench-100",
"code_license": "Apache-2.0",
"data_license": "CC-BY-4.0",
"deadline": "2026-09-08T00:00:00",
"document_count": 96,
"jurisdiction": "Delaware",
"matter_number": "CB-MA-2402",
"mcp_commit": "9a96ea6e5913736f92b88345bf51caeaaa8e719f",
"mcp_package": "@modelcontextproto... | You are buyer-side transactions counsel for Northstar Orbit plc. A late document production changed the factual picture, and the matter team needs the entire record reconciled from first principles. The target licenses university navigation code, operates a classified support unit, and recently refinanced through a len... | {
"criteria": [
{
"category": "procedure",
"description": "Complete at least 46 successful, argument-specific evidence and output calls.",
"id": "procedure.minimum_successful_tool_calls"
},
{
"category": "procedure",
"description": "Find and read the 33 controlling, corrobora... | cb100-002-northstar-orbit | Project Sextant satellite software merger | counselbench-filesystem-mcp-v2 |
["task_files/cb100-003-lumen-health/01_corporate/001_corporate_control_register.md","task_files/cb10(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Orchard clinic platform purchase\n\n## Executive as(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Lumen Health Partners. The client has asked for a board(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-003-lumen-health | Project Orchard clinic platform purchase | counselbench-filesystem-mcp-v2 |
["task_files/cb100-004-tamarack-foods/01_corporate/001_corporate_control_register.md","task_files/cb(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Copper Kettle food plant divestiture\n\n## Executiv(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Tamarack Foods Group. Several workstreams have maintain(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-004-tamarack-foods | Project Copper Kettle food plant divestiture | counselbench-filesystem-mcp-v2 |
["task_files/cb100-005-solace-mobility/01_corporate/001_corporate_control_register.md","task_files/c(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Lantern fleet technology acquisition\n\n## Executiv(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Solace Mobility Holdings. Outside counsel inherited thi(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-005-solace-mobility | Project Lantern fleet technology acquisition | counselbench-filesystem-mcp-v2 |
["task_files/cb100-006-meridian-water/01_corporate/001_corporate_control_register.md","task_files/cb(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Spillway treatment business acquisition\n\n## Execu(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Meridian Water Infrastructure. The upcoming deadline le(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-006-meridian-water | Project Spillway treatment business acquisition | counselbench-filesystem-mcp-v2 |
["task_files/cb100-007-bracken-home/01_corporate/001_corporate_control_register.md","task_files/cb10(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Hearth consumer products merger\n\n## Executive ass(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Bracken Home Brands. A counterparty challenged the clie(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-007-bracken-home | Project Hearth consumer products merger | counselbench-filesystem-mcp-v2 |
["task_files/cb100-008-cobalt-learning/01_corporate/001_corporate_control_register.md","task_files/c(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Chalkboard education platform purchase\n\n## Execut(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Cobalt Learning Cooperative. The supervising attorney w(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-008-cobalt-learning | Project Chalkboard education platform purchase | counselbench-filesystem-mcp-v2 |
["task_files/cb100-009-silverline-logistics/01_corporate/001_corporate_control_register.md","task_fi(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Switchyard logistics roll-up\n\n## Executive assess(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Silverline Logistics LP. This matter will be reviewed b(...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-009-silverline-logistics | Project Switchyard logistics roll-up | counselbench-filesystem-mcp-v2 |
["task_files/cb100-010-verdant-grid/01_corporate/001_corporate_control_register.md","task_files/cb10(...TRUNCATED) | {"advice_markdown":"# Counsel advice — Project Canopy microgrid acquisition\n\n## Executive assess(...TRUNCATED) | {"benchmark":"CounselBench-100","code_license":"Apache-2.0","data_license":"CC-BY-4.0","deadline":"2(...TRUNCATED) | "You are buyer-side transactions counsel for Verdant Grid Holdings. The record contains amendments, (...TRUNCATED) | {"criteria":[{"category":"procedure","description":"Complete at least 46 successful, argument-specif(...TRUNCATED) | cb100-010-verdant-grid | Project Canopy microgrid acquisition | counselbench-filesystem-mcp-v2 |
End of preview. Expand in Data Studio
CounselBench-100
CounselBench-100 is a synthetic long-horizon legal-agent benchmark with 100 distinct matters across ten practice workflows. Every task presents a high-level employee request, 96 production-style source records in 12 folders, 64 realistic distractors, 33 required evidence records, three explicit decision options, and a distinct 46-call reference MCP trajectory. The v2.0 grader exposes 182 matter-specific deterministic criteria across investigation (25%), structured findings (55%), and counsel advice (20%); full task pass still requires every criterion.
Public release
- Runnable Harbor world: https://hub.harborframework.com/datasets/blobfishai/counselbench-100
- Dataset and test assets: https://huggingface.co/datasets/SamuelChien821/counselbench-100
- Benchmark page: https://blobfish.ai/benchmarks/counselbench-100
- Builder and verifier source: https://github.com/blobfishai/legal-agent-simulation/tree/master/benchmark/counselbench100
What is included
data/tasks.jsonl: Apex-compatible task records (task_id,task_name,world_id,prompt,context_files,rubric,gold_output,metadata).tasks/: one readable JSON record per matter.task_files/: 9,600 seeded evidence documents (md,txt,eml,csv,json,xml, andhtml).world/: the offline Streamable HTTP MCP world and deterministic verifier source.contracts/: pinned live contract snapshots for the official MCP filesystem server.tests/: conformance and full-suite test programs.SCORING.md: the versioned 182-criterion scoring contract and v1.0 correction rationale.EVALUATION_ARCHITECTURE.md: the runtime map to Archipelago/APEX and the intentional deterministic-grading differences.trajectories/andreports/: all 100 generated reference traces and measured oracle/control evidence. A model row is published only after all 100 tasks run on this exact release.
Objective release gates
| Gate | Required |
|---|---|
| Tasks | 100 |
| Practice workflows | 10 |
| Source records per task | 96 |
| Required evidence records per task | 33 |
| Reference MCP calls per task | 46 |
| LLM or network calls in verifier | 0 |
| Oracle passes | 100/100 |
| Shortcut, incomplete-read, and wrong-fact false accepts | 0 |
Measured results are stored in reports/qualification.json; do not infer a model score from the reference trajectory.
Deterministic v2.0 scoring
- Each task has 182 visible criteria: 8 procedure, 152 structured-findings, and 22 memo criteria.
- Each finding is graded field by field against record-control metadata exposed to the agent.
- Determinations must contain the seeded fact anchors and may not introduce controlled dates, amounts, percentages, addresses, or references absent from the cited source pair.
- Recommendations must preserve the seeded response deadline and remediation owner.
- Incomplete review procedure caps reward below 0.5, even when an output resembles the gold file.
- Full-output exact match is retained only as a diagnostic and does not erase legitimate partial credit.
MCP fidelity
The world exposes an allowlisted subset of @modelcontextprotocol/server-filesystem@2026.7.10 using the same tool names, input JSON Schema, annotations, content, and structuredContent result shapes. The upstream repository is pinned to commit 9a96ea6e5913736f92b88345bf51caeaaa8e719f. tests/conformance.py launches the real package and compares live behavior against the offline mock.
Data and contamination
Every person, entity, amount, address, event, and document is synthetic. The catalog was written for this release; Harvey Labs and Apex Accounting informed packaging and depth targets only. No Harvey or Apex task text, evidence, rubric, or gold answer is included. Gold outputs are public, as in Apex Accounting, so this release is appropriate for transparent evaluation and RL experiments rather than secret-test claims.
Licenses
Synthetic task data and documents are CC-BY-4.0. Benchmark code and test harnesses are Apache-2.0. Third-party MCP contract metadata remains subject to the upstream MIT license; provenance is recorded in contracts/upstream-pin.json.
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