opensearch-project/ml-commons

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ml-commons provides a set of common machine learning algorithms, e.g. k-means, or linear regression, to help developers build ML related features within OpenSearch.

Stars: 157
Forks: 224
Open beginner issues: 1
Indexed issues: 355
Avg merge: 1d 20h
Merged PRs (30d): 43

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 20, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

355 open issues indexed

[BUG] Error-status and input-validation inconsistencies: `_predict` returns NPE 500 on a deep/large payload, an unparseable model document is undeletable, and several endpoints 500 where siblings 400 Open

bug untriaged v3.9.0

Difficulty 5/5 Over a week Newbie friendliness 20/100

opensearch-project/ml-commons#5038 · Opened Sep 18, 2026
[BUG] Memory retention: an interval change made while `retention_enabled=false` is permanently discarded, and disabling retention never deschedules the job Open

bug untriaged v3.9.0

Difficulty 4/5 3-5 days Newbie friendliness 48/100

opensearch-project/ml-commons#5037 · Opened Sep 18, 2026
[BUG] Unified agent V2: Bedrock S3 media sources are rejected by Bedrock, `max_iteration` cannot be configured, and legacy input returns a 500 with an internal message Open

bug untriaged v3.9.0

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

opensearch-project/ml-commons#5036 · Opened Sep 18, 2026
[BUG] Agentic search template: derived param-schemas advertise values that hard-fail the query, and a valid Mustache template can be unregisterable Open

bug untriaged v3.9.0

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

opensearch-project/ml-commons#5035 · Opened Sep 18, 2026
[BUG] Batch inference splitting silently stores wrong vectors in `knn_vector` fields, and several batch/queue config values are unvalidated or ignored Open

bug untriaged v3.9.0

Difficulty 4/5 3-5 days Newbie friendliness 55/100

opensearch-project/ml-commons#5033 · Opened Sep 18, 2026
Onboard ml-model as its own resource type and migrate model-group sharing to models Open

enhancement untriaged

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

opensearch-project/ml-commons#5027 · 1 comment · Opened Sep 17, 2026
[BUG] MCP server `tools/call` crashes with ClassCastException when SearchIndexTool is invoked with `return_raw_response: true` Open

bug untriaged

Difficulty 3/5 1-2 days Newbie friendliness 55/100

opensearch-project/ml-commons#5010 · Opened Sep 14, 2026
[FEATURE] [RFC] Dynamic Semantic Tool Selection for ML Commons Agents Open

enhancement untriaged

Difficulty 5/5 Over a week Newbie friendliness 42/100

opensearch-project/ml-commons#5006 · 1 comment · Opened Sep 10, 2026
[BUG] Model registration fails under security with "Direct self-reference leading to cycle (User[principal])" after Jackson 3.x migration Open

bug untriaged

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

opensearch-project/ml-commons#4990 · 5 comments · Opened Aug 26, 2026
[AUTOCUT] Integration Test Failed for ml-commons-3.9.0 Open

autocut untriaged v3.9.0

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

opensearch-project/ml-commons#4985 · 1 comment · Opened Aug 20, 2026
[RFC] Importance-aware eviction for long-term agentic memory Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 30/100

opensearch-project/ml-commons#4979 · 1 comment · Opened Aug 11, 2026
[RELEASE] Release version 3.9.0 Open

opensearch-project/ml-commons#4977 · 2 comments · 1 assignee · Opened Aug 8, 2026
[FEATURE] Add Client Certificate Authentication Support for MCP Connectors Open

enhancement v3.9.0

opensearch-project/ml-commons#4971 · 1 assignee · Opened Aug 6, 2026
[BUG] Three minor pre-existing MCP defects found in 3.8 bug bash: empty tool input, unparseable tools-index doc, all-or-nothing bulk remove Open

bug

opensearch-project/ml-commons#4938 · 1 assignee · Opened Jul 27, 2026
[Flaky Test] RestChatAgentWithMcpConnectorIT.testChatAgentWithMcpStreamableHttpConnector Open

bug

opensearch-project/ml-commons#4935 · 1 assignee · Opened Jul 24, 2026
[RFC] Agentic search templates: param-schema index + registration for search-template fill Open

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

opensearch-project/ml-commons#4925 · Opened Jul 22, 2026
[RFC] memory store support in standsSDk Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 32/100

opensearch-project/ml-commons#4919 · 2 comments · Opened Jul 21, 2026
[BUG] Update the chatbot documentation based on a latest model Open

bug

opensearch-project/ml-commons#4908 · 2 comments · 1 assignee · Opened Jul 14, 2026
[FEATURE] Support inline template_body in QueryPlanningTool search_templates Open

enhancement

opensearch-project/ml-commons#4901 · 1 assignee · Opened Jul 11, 2026
[FEATURE]Deprecate FunctionName (algorithm) parameter in MLInput for predict API Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 57/100

opensearch-project/ml-commons#4891 · 1 comment · Opened Jul 1, 2026
Flaky test: RestChatAgentWithMcpConnectorIT.testChatAgentWithMcpStreamableHttpConnector Open

bug flaky-test

Difficulty 3/5 1-2 days Newbie friendliness 55/100

opensearch-project/ml-commons#4890 · 1 comment · Opened Jul 1, 2026
[RFC] Server-Side Batch Inference for ML Commons Open

opensearch-project/ml-commons#4889 · 5 comments · 1 assignee · Opened Jun 30, 2026
[BUG] Change `next_token` in ml-commons from `int` to an opaque `String` Open

opensearch-project/ml-commons#4861 · 2 comments · 1 assignee · Opened Jun 17, 2026
[RFC] Memory Retention Lifecycle for Agentic Memory Containers Open

enhancement v3.8.0

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

opensearch-project/ml-commons#4859 · 9 comments · 1 reaction · Opened Jun 15, 2026
[FEATURE] Support user-configurable retryable HTTP status codes for remote connectors Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

opensearch-project/ml-commons#4850 · 1 comment · Opened Jun 4, 2026
[DOC] Add connector blueprint for Bedrock Cohere Rerank v3.5 Open

Difficulty 2/5 Half a day Newbie friendliness 76/100

opensearch-project/ml-commons#4831 · Opened May 26, 2026
[AUTOCUT] Distribution Build Failed for ml-commons-3.6.1 Open

autocut v3.6.1

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

opensearch-project/ml-commons#4819 · 1 comment · Opened May 10, 2026
Auto-create default memory container when registering agent with agentic_memory Open

enhancement

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

opensearch-project/ml-commons#4791 · 2 comments · 3 reactions · Opened Apr 13, 2026
Add indices:admin/get and indices:data/read/search permissions to ml_full_access role for Agentic Search Open

enhancement

opensearch-project/ml-commons#4775 · 4 comments · 1 assignee · Opened Apr 4, 2026
[RELEASE] Release version 3.7.0 Open

v3.7.0

opensearch-project/ml-commons#4753 · 1 comment · 1 assignee · Opened Mar 31, 2026
[Enhancement] store SummarizationManager's summaries in memory Open

enhancement

opensearch-project/ml-commons#4750 · 1 comment · 1 assignee · Opened Mar 30, 2026
[BUG] AG-UI agent returning extra event when using OpenAI as model provider Open

bug

opensearch-project/ml-commons#4736 · 1 comment · 1 assignee · Opened Mar 24, 2026
[FEATURE] Support user-specified IDs when creating connectors and registering models Open

opensearch-project/ml-commons#4735 · 3 comments · 1 assignee · Opened Mar 23, 2026
[FEATURE] Agent-level Token Limit parameter Open

enhancement

opensearch-project/ml-commons#4728 · 23 reactions · 1 assignee · Opened Mar 19, 2026
[RFC] Working Memory Retention for Agentic Memory Open

3.7 enhancement

opensearch-project/ml-commons#4727 · 1 assignee · Opened Mar 19, 2026
[BUG] Missing connectionAcquireTimeout in NettyNioAsyncHttpClient causes connector request failures under load Open

bug

opensearch-project/ml-commons#4717 · 1 assignee · Opened Mar 11, 2026
[BUG] Remote connector forwards upstream 5xx/429 status codes to client as-is, misleading clients about OpenSearch health Open

bug enhancement

opensearch-project/ml-commons#4713 · 1 assignee · Opened Mar 10, 2026
[AUTOCUT] Distribution Build Failed for ml-commons-2.19.5 Open

autocut v2.19.5

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

opensearch-project/ml-commons#4703 · Opened Mar 9, 2026
[AUTOCUT] Integration Test Failed for ml-commons-2.19.5 Open

autocut v2.19.5

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

opensearch-project/ml-commons#4696 · 4 comments · Opened Mar 5, 2026
Support Nova models for agent framework Open

enhancement v3.6.0

opensearch-project/ml-commons#4680 · 1 assignee · Opened Feb 27, 2026
Re-enable trace on unified interface agent with conversation_index memory Open

bug v3.6.0

opensearch-project/ml-commons#4677 · 1 assignee · Opened Feb 26, 2026
Parallelize CI: split assemble from test to unblock docker job Open

v3.6.0

opensearch-project/ml-commons#4674 · 1 assignee · Opened Feb 26, 2026
[FEATURE] Support video/document content in AG-UI agent Open

enhancement v3.6.0

opensearch-project/ml-commons#4664 · 1 assignee · Opened Feb 24, 2026
[RFC] Enable Parallel Tests for ml-commons Open

bug v3.6.0

opensearch-project/ml-commons#4663 · 1 assignee · Opened Feb 24, 2026
[RFC] Agent Skills Support Open

feature

opensearch-project/ml-commons#4648 · 1 assignee · Opened Feb 17, 2026
[BUG] get task api exception message is hidden Open

bug good first issue

opensearch-project/ml-commons#4636 · 5 comments · 1 assignee · Opened Feb 8, 2026
[BUG] When agent response is too long, failed to update task index Open

bug good first issue

opensearch-project/ml-commons#4635 · 6 comments · 1 assignee · Opened Feb 8, 2026
[BUG] Agent execution sometimes failed to update memory Open

bug

opensearch-project/ml-commons#4634 · 2 comments · 1 assignee · Opened Feb 7, 2026
Implement Downstream Repository CI Triggering for ML-Commons Code Changes Open

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

opensearch-project/ml-commons#4631 · Opened Feb 6, 2026
[BUG] inline create connector easily exceed max_connection Open

bug

opensearch-project/ml-commons#4629 · 3 comments · 1 assignee · Opened Feb 6, 2026

opensearch-project/ml-commons

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