PrefectHQ/marvin

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an ambient intelligence library

Stars: 6.2k
Forks: 415
Open beginner issues: 0
Indexed issues: 64
Avg merge: 54m
Merged PRs (30d): 7

Dominant language: Python
License: Apache-2.0
Last GitHub push: Sep 11, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

64 open issues indexed

docs: two live links now return 404 (ControlFlow and Slack invite) Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

PrefectHQ/marvin#1397 · Opened Sep 13, 2026
On Windows tzdata is required Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

PrefectHQ/marvin#1383 · 1 comment · Opened Aug 21, 2026
Marvin 3.2.7 is not compatible with pydantic-ai 2.33.0 Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

PrefectHQ/marvin#1382 · Opened Aug 21, 2026
Feature: Persistent memory backend for Marvin agents via Dakera Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

PrefectHQ/marvin#1360 · 1 comment · Opened Jul 1, 2026
fix: IndexError in is_classifier/as_classifier with bare typing.List Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

PrefectHQ/marvin#1355 · 1 comment · Opened Jun 1, 2026
BUG: IndexError in schema_to_type() when type list contains only "null" Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

PrefectHQ/marvin#1353 · 1 comment · Opened Jun 1, 2026
BUG: TypeError crash in create_array_type() when items is an empty list Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

PrefectHQ/marvin#1351 · 1 comment · Opened May 31, 2026
Feature request: OWASP ASI06 memory poisoning defense for Marvin AI functions Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

PrefectHQ/marvin#1347 · Opened May 21, 2026
BinaryImage causes token explosion when passed to marvin.cast() Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PrefectHQ/marvin#1246 · 1 comment · Opened Nov 18, 2025
3.0 breaking changes Open

maintenance

Difficulty 5/5 Over a week Newbie friendliness 15/100

PrefectHQ/marvin#1072 · Opened Feb 27, 2025
How can we batch requests? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#971 · 2 comments · Opened Sep 17, 2024
`from __future__ import annotations` causes ai functions to return strings Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PrefectHQ/marvin#950 · 7 comments · Opened Jul 14, 2024
Invalid schema error with complex types Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

PrefectHQ/marvin#946 · 2 comments · Opened Jun 28, 2024
Support for windows - marvin version command throws certificate error Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#943 · 1 comment · Opened Jun 27, 2024
Limiting the attempts of updating the application state Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PrefectHQ/marvin#938 · Opened Jun 17, 2024
Loading Image from file raises ValueError Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 58/100

PrefectHQ/marvin#933 · Opened May 30, 2024
An 'IndexError' is thrown when executing the AI-powered function Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#931 · 2 comments · 1 reaction · Opened May 24, 2024
Getting the error - ThreadMessage ImportError: cannot import name 'ThreadMessage' from 'openai.types.beta.threads' on python 3.10 version after installing llama-parse and llama-index libraries Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#900 · 1 comment · Opened Apr 4, 2024
Allow local function calling? Open

question

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#889 · 3 comments · Opened Mar 27, 2024
Estimate token usage, cost Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PrefectHQ/marvin#870 · 6 comments · Opened Mar 14, 2024
Using OpenAI tools with Assistant fails Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrefectHQ/marvin#852 · 2 comments · 1 reaction · Opened Feb 16, 2024
Marvin Speak Language Selection Open

enhancement feature

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PrefectHQ/marvin#837 · 1 comment · Opened Feb 10, 2024
Defining ai_fn at runtime Open

enhancement feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#831 · 7 comments · Opened Feb 6, 2024
API key required even when using local language models Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 30/100

PrefectHQ/marvin#828 · 1 comment · Opened Feb 6, 2024
add collection docs to marvin bot index Open

enhancement good first issue

PrefectHQ/marvin#826 · 1 comment · 1 assignee · Opened Feb 5, 2024
add configurable retries that swap `model_kwargs` Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 38/100

PrefectHQ/marvin#794 · 2 comments · 1 reaction · Opened Jan 20, 2024
AI Model for complex structures Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#735 · 5 comments · Opened Jan 12, 2024
marvin in typescript Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#678 · 2 reactions · Opened Dec 12, 2023
Make `shell` tools capable of interactive use Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

PrefectHQ/marvin#657 · Opened Nov 24, 2023
RateLimitError returned when error does not seem to be related to rate limits Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 28/100

PrefectHQ/marvin#648 · 1 comment · Opened Nov 15, 2023
We need to support the message which is not included in the history Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

PrefectHQ/marvin#647 · Opened Nov 15, 2023
Dependency Conflict with Latest OpenAI Package Version Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#645 · 4 comments · 4 reactions · Opened Nov 14, 2023
Add support for Anthropic models via AWS Bedrock Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PrefectHQ/marvin#644 · 3 comments · 4 reactions · Opened Nov 13, 2023
add CI for publishing images Open

enhancement

PrefectHQ/marvin#643 · 1 assignee · Opened Nov 10, 2023
ValueError: Unknown provider: ProsusAI when importing marvin module Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#637 · 3 comments · Opened Nov 7, 2023
Documentation for drop-in OpenAI replacement does not work Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

PrefectHQ/marvin#633 · 3 comments · Opened Nov 5, 2023
Docs show duplicate todo Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PrefectHQ/marvin#630 · Opened Nov 3, 2023
`ParamSpec` in `AIFunction.__call__` breaks `FastAPI.add_api_route` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PrefectHQ/marvin#625 · Opened Oct 27, 2023
handle `Optional` return annotations with `ai_fn` Open

enhancement

PrefectHQ/marvin#623 · 1 assignee · Opened Oct 26, 2023
Prompt serialization fails if user string contains any of the role names (['System', 'Assistant', 'User', 'Function']) Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrefectHQ/marvin#619 · 3 comments · Opened Oct 25, 2023
`@ai_classifier` should limit its `max_tokens` Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#614 · 3 comments · Opened Oct 17, 2023
Add autogen-like conversation capabilities between agents Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#609 · 4 comments · 1 reaction · Opened Oct 6, 2023
`@ai_classifier` Azure Configuration Appears to Have No Effect Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#606 · 5 comments · Opened Oct 2, 2023
Failing to import marvin with "ImportError: cannot import name 'BaseSettings'" after installing using pip install in Github Codespaces Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrefectHQ/marvin#605 · 5 comments · Opened Oct 2, 2023
Pydantic 1.X changes prompt order and breaks response Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PrefectHQ/marvin#604 · 7 comments · 3 reactions · Opened Sep 29, 2023
No output from logging in DEBUG mode Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 25/100

PrefectHQ/marvin#602 · 2 comments · Opened Sep 28, 2023
Support new openai available model: gpt-3.5-turbo-instruct Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrefectHQ/marvin#585 · 1 comment · 2 reactions · Opened Sep 18, 2023
Missing stubs Open

enhancement

PrefectHQ/marvin#579 · 5 comments · 4 reactions · 1 assignee · Opened Sep 14, 2023
Add Pydantic Validation Re-Asking for Formatting Errors. Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrefectHQ/marvin#570 · 1 comment · Opened Sep 12, 2023
Streaming AIApplication error with Azure OpenAI API Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PrefectHQ/marvin#541 · Opened Aug 23, 2023

PrefectHQ/marvin

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