Release Notes v0.6.0¶

Release Date: February 22, 2026

Highlights¶

Built-in slog provider for local trace logging during development and debugging
Structured evaluation integration for connecting llmops with sevaluation workflows

New Features¶

slog Provider¶

A new provider that logs trace events to Go's standard log/slog package. Useful for local development, debugging, or as a fallback when no observability platform is configured.

import (
    "log/slog"

    "github.com/plexusone/omniobserve/llmops"
    _ "github.com/plexusone/omniobserve/llmops/slog"
)

// Use default slog logger
provider, err := llmops.Open("slog",
    llmops.WithProjectName("my-project"),
)

// Or use a custom logger
provider, err := llmops.Open("slog",
    llmops.WithLogger(slog.Default()),
    llmops.WithProjectName("my-project"),
)

Output example:

INFO trace started trace_id=abc123 name=chat-workflow project=my-project
INFO span started span_id=def456 trace_id=abc123 name=llm-call type=llm model=gpt-4
INFO span ended span_id=def456 trace_id=abc123 name=llm-call duration=1.5s prompt_tokens=10 completion_tokens=8
INFO trace ended trace_id=abc123 name=chat-workflow duration=2.1s

WithLogger Option¶

New configuration option for providing a custom *slog.Logger:

logger := slog.New(slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{
    Level: slog.LevelDebug,
}))

provider, _ := llmops.Open("slog",
    llmops.WithLogger(logger),
)

Structured Evaluation Integration¶

New integrations/sevaluation package connects OmniObserve with structured-evaluation workflows:

import "github.com/plexusone/omniobserve/integrations/sevaluation"

eval := sevaluation.New(provider)
results, err := eval.Run(ctx, suite)

Bug Fixes¶

Fixed gosec warnings for APIKey struct fields (G117) by adding nolint directives with proper justification
Fixed gosec HTTP client SSRF warnings (G704) with appropriate documentation that URLs are from trusted sources

Documentation¶

Added observability integration guide for stats-agent-team
Updated README with slog provider in supported providers table
Created MkDocs documentation site

Dependencies¶

Upgraded github.com/lib/pq from v1.10.9 to v1.11.1

Provider Capabilities¶

Updated provider capabilities table:

Feature	Opik	Langfuse	Phoenix	slog
Tracing	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:
Evaluation	:white_check_mark:	:white_check_mark:	:white_check_mark:	:x:
Prompts	:white_check_mark:	Partial	:x:	:x:
Datasets	:white_check_mark:	:white_check_mark:	Partial	:x:
Experiments	:white_check_mark:	:white_check_mark:	Partial	:x:
Streaming	:white_check_mark:	:white_check_mark:	Planned	:x: