Datasets:

kasuboski
/

gleam-instruct

id string	source_file_id string	source_repo_url string	messages list	task_type string	source_language null	model_used string	license string	schema_version int64
sft_gleam_00001	0918nobita/domu/src/domu/console.gleam	https://github.com/0918nobita/domu	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00002	0918nobita/domu/src/domu/global/console.gleam	https://github.com/0918nobita/domu	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00003	0918nobita/domu/src/domu/internal/iterator_compat.gleam	https://github.com/0918nobita/domu	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00004	0918nobita/domu/src/domu/window.gleam	https://github.com/0918nobita/domu	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00005	0918nobita/domu/test/domu_test/event_target.gleam	https://github.com/0918nobita/domu	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00006	0918nobita/domu/test/happy_dom.gleam	https://github.com/0918nobita/domu	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00007	0918nobita/json_canvas/src/json_canvas/internal/decode/edge.gleam	https://github.com/0918nobita/json_canvas	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00008	0918nobita/json_canvas/src/json_canvas/internal/encode/edge.gleam	https://github.com/0918nobita/json_canvas	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00009	0918nobita/json_canvas/src/json_canvas/internal/generic_node.gleam	https://github.com/0918nobita/json_canvas	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00010	0ngk/kitazith/src/kitazith/component.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00011	0ngk/kitazith/src/kitazith/component/separator.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00012	0ngk/kitazith/src/kitazith/flag.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00013	0ngk/kitazith/src/kitazith/webhook/delete_query.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00014	0ngk/kitazith/test/kitazith/message_formatting/guild_navigation_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00015	0ngk/kitazith/test/kitazith/message_formatting/timestamp_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00016	0ngk/kitazith/test/kitazith/poll_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00017	0ngk/kitazith/test/kitazith/timestamp_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00018	0ngk/kitazith/test/kitazith/webhook/delete_query_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00019	0ngk/kitazith/test/kitazith/webhook/edit_query_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1
sft_gleam_00020	0ngk/kitazith/test/kitazith/webhook/get_query_test.gleam	https://github.com/0ngk/kitazith	[ { "role": "system", "content": "You are a helpful Gleam programming assistant.\n\nKey Gleam rules:\n- Float operators use a dot: +. -. *. /. String concatenation uses <>.\n- No return keyword — the last expression is returned. No null or exceptions.\n- Error handling uses Result(success, error) with Ok/Err...	code_gen	null	gpt-oss-120b	Apache-2.0	1

End of preview.

Gleam Instruct

A synthetic instruction-following dataset for fine-tuning language models to become Gleam programming specialists. Contains 14,053 high-quality instruction-response pairs covering code generation, explanation, and completion tasks, all derived from real open-source Gleam code.

Dataset Summary

Metric	Value
Total records	14,053
Task types	code_gen, explanation, completion
Source files	4,700 unique `.gleam` files
Source repos	997 GitHub repositories
Format	ChatML (system → user → assistant)
Generation model	`gpt-oss-120b` (primary), `openai/gpt-oss-120b` via OpenRouter, `glm-5.1` via Z.ai

By task type

Task	Records	Description
`code_gen`	4,667	Write a new Gleam module inspired by a reference snippet
`explanation`	4,698	Explain a Gleam code snippet in detail
`completion`	4,688	Complete a partially-truncated Gleam module

Schema

Each record follows standard ChatML format with metadata:

{
  "id": "sft_gleam_00001",
  "source_file_id": "owner/repo/path.gleam",
  "source_repo_url": "https://github.com/owner/repo",
  "messages": [
    {"role": "system", "content": "You are a helpful Gleam programming assistant..."},
    {"role": "user", "content": "<task-specific instruction with source code>"},
    {"role": "assistant", "content": "<model response>"}
  ],
  "task_type": "code_gen",
  "source_language": null,
  "model_used": "gpt-oss-120b",
  "license": "Apache-2.0",
  "schema_version": 1
}

Field descriptions

Field	Type	Description
`id`	string	Unique record identifier
`source_file_id`	string	Source file in `owner/repo/path.gleam` format
`source_repo_url`	string	GitHub repository URL for attribution
`messages`	list	ChatML conversation (system + user + assistant)
`task_type`	string	`code_gen`, `explanation`, or `completion`
`source_language`	null	Reserved for translation tasks (future)
`model_used`	string	Model that generated the response
`license`	string	Dataset license
`schema_version`	int	Schema version (currently 1)

Task Type Details

Code Generation (`code_gen`)

Given a Gleam code snippet as a reference, write a new module that solves a related but different problem. The model is instructed to use idiomatic Gleam: type annotations, pattern matching, Result for errors, and pipe operators.

Explanation (`explanation`)

Given a Gleam code snippet, provide a detailed explanation covering what each function does, how types are used, and notable patterns or idioms. Explanations are targeted at someone learning Gleam.

Completion (`completion`)

Given the first ~60% of a Gleam module (truncated at a random line with a // TODO hint), complete the remaining functions to produce a working module with type annotations and idiomatic patterns.

Generation Pipeline

Corpus: 22,581 Gleam source files from 1,528 GitHub repositories (see kasuboski/gleam-code-corpus)
Sampling: 4,700 files sampled with seed=42, filtered to exclude oversized files (>3K input tokens)
Generation: Each file used to generate one instruction-response pair per task type via openai/gpt-oss-120b
Deduplication: Kept latest generation per (file, task_type) — some files were regenerated to fix truncation
Filtering: Removed truncated responses, failed API calls, and 6 degenerate repetitive outputs (unique line ratio < 0.3)
Reconstruction: User messages rebuilt from source code + task templates; assistant messages preserved verbatim

Quality

0% truncation rate on explanation tasks (max_tokens bumped to 8,192)
<1% truncation on code_gen (0.6%) and completion (0.2%)
6 degenerate records filtered out (model looping on repeated patterns)
All source code from permissive-license repositories

Loading the Dataset

from datasets import load_dataset

ds = load_dataset("kasuboski/gleam-instruct", data_files="train.jsonl")

Or directly with polars:

import polars as pl
df = pl.read_ndjson("gleam-instruct.jsonl")

Training-Time Mixing

This dataset contains only Gleam-focused pairs. For best results during SFT, we recommend mixing with anti-forgetting data at training time:

Source	~Count	Purpose
This dataset	14,053	Gleam specialization
HuggingFaceH4/ultrachat_200k	~3,000	General instruction following
nvidia/OpenCodeInstruct	~500	General code skill preservation

A ~30% general data mix prevents catastrophic forgetting when fine-tuning on a narrow domain like Gleam. Adjust ratios based on your base model and use case.

Intended Use

Supervised fine-tuning of LLMs for Gleam code generation and understanding
Domain adaptation experiments for niche programming languages
Instruction tuning research on code-specific tasks

Limitations

Responses are synthetically generated and may contain subtle errors or non-idiomatic patterns
Code generation tasks use a limited set of 5 instruction templates
No syntax validation was performed on generated Gleam code
The dataset is English-only
Source code is weighted toward popular/maintained repos — may underrepresent edge cases

License

Apache-2.0

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Total file size:

168 MB