Datasets:

jedisct1
/

tool-calling

language:
  - en
license: mit
pretty_name: Tool Calling Harness Training Corpus
tags:
  - tool-calling
  - agents
  - codex
  - opencode
  - swival
  - function-calling
task_categories:
  - text-generation

Tool Calling Harness Training Corpus

This dataset contains supervised tool-calling conversations and executable eval tasks for three local coding-agent harnesses:

Swival
opencode
Codex CLI

The examples are OpenAI-style chat records. Assistant tool calls use a tool_calls array with JSON-encoded function arguments, followed by tool-result messages and final assistant responses. The corpus is intended for fine-tuning and evaluating local models that need to choose the right tool, use the correct argument shape, recover from harness-specific mistakes, and verify coding work through the actual harness.

Files

Training splits:

swival/train.jsonl: 6,064 examples
opencode/train.jsonl: 6,290 examples
codex/train.jsonl: 6,410 examples

Eval task specs:

swival/eval.jsonl: 5 executable eval tasks
opencode/eval.jsonl: 5 executable eval tasks
codex/eval.jsonl: 5 executable eval tasks

Tool inventories:

swival/tool_inventory.json
opencode/tool_inventory.json
codex/tool_inventory.json

Harness support files:

configs/opencode-qwen35.json
configs/codex-qwen35.toml
scripts/run_swival_eval.py
scripts/run_opencode_eval.py
scripts/run_codex_eval.py
scripts/validate_dataset.py
scripts/validate_opencode_dataset.py
scripts/validate_codex_dataset.py

Local Harness Targets

The generated eval runners were tested against a local OpenAI-compatible qwen35 server at http://127.0.0.1:8000.

Swival uses:

swival --profile omlx

opencode uses:

bunx opencode-ai@latest run --model qwen35/qwen35

Codex uses:

env OMLX_API_KEY=omlx codex -a never exec --json --ephemeral --skip-git-repo-check --sandbox workspace-write -c model_provider=\"omlx\" -m qwen35

Validation

The source workspace validated the generated artifacts with:

uv run python scripts/validate_dataset.py data/swival_tool_calling_train.jsonl
uv run python scripts/validate_dataset.py data/swival_tool_calling_eval.jsonl
uv run python scripts/validate_opencode_dataset.py data/opencode_tool_calling_train.jsonl
uv run python scripts/validate_opencode_dataset.py data/opencode_tool_calling_eval.jsonl
uv run python scripts/validate_codex_dataset.py data/codex_tool_calling_train.jsonl
uv run python scripts/validate_codex_dataset.py data/codex_tool_calling_eval.jsonl
uv run python scripts/run_swival_eval.py --self-check
uv run python scripts/run_opencode_eval.py --self-check
uv run python scripts/run_codex_eval.py --self-check

Live smoke tests were also run for opencode and Codex against the local qwen35 endpoint. Swival, opencode, and Codex each have their own tool naming and argument conventions, so the examples intentionally avoid collapsing them into one generic schema.

Schema

Training rows use:

{
  "id": "string",
  "split": "train",
  "tags": ["harness", "tool_name"],
  "messages": [
    {"role": "user", "content": "task"},
    {
      "role": "assistant",
      "content": "",
      "tool_calls": [
        {
          "id": "call_1",
          "type": "function",
          "function": {
            "name": "tool_name",
            "arguments": "{\"key\":\"value\"}"
          }
        }
      ]
    },
    {"role": "tool", "tool_call_id": "call_1", "name": "tool_name", "content": "tool result"},
    {"role": "assistant", "content": "final response"}
  ]
}

Eval rows define disposable workspace files plus verifiers such as exact file contents, substring checks, missing-file checks, JSON field checks, and command checks.