prometa-sdk 0.3.4

Official Python SDK for the Prometa Agentic Lifecycle Intelligence Platform

prometa-sdk (Python)

Official Python SDK for the Prometa Agentic Lifecycle Intelligence Platform.

Wraps OpenTelemetry GenAI semantic conventions with @prometa decorators that automatically emit lifecycle metadata (solution_id, stage, agent) to your Prometa instance via OTLP/JSON.

Install

pip install prometa-sdk

Quick start

import asyncio
from prometa import Prometa

prometa = Prometa(
    endpoint="https://prometa.example.com/api/v2/otlp/v1/traces",
    api_key="prm_live_...",
    solution_id="sol_abc123",
    agent_name="customer-support",
    stage="production",
)

@prometa.workflow(name="handle-ticket")
async def handle_ticket(ticket_id: str) -> str:
    @prometa.agent(name="classifier")
    async def classify() -> str:
        return "billing"

    @prometa.tool(name="kb-search")
    async def kb_search(q: str) -> list[str]:
        return ["doc1", "doc2"]

    category = await classify()
    results = await kb_search(category)
    return f"resolved {ticket_id} via {results}"

asyncio.run(handle_ticket("T-1234"))
prometa.flush()

What gets captured

Each decorated function emits a span with:

• prometa.kind — workflow | agent | tool | task
• prometa.solution_id, prometa.stage
• gen_ai.agent.name, gen_ai.agent.id
• gen_ai.conversation.id — when the producer opts into session grouping (see below)
• Parent/child relationships across async/sync calls
• Errors → span status error plus error.message

Grouping traces into conversational sessions

A chat-style agent typically produces many traces per user conversation (one per message turn, one per background tool call, one per retry). The platform's Session Explorer groups all traces sharing a session id into one row, with aggregated cost, tokens, duration, and a side-by-side conversation timeline that spans the whole session.

To opt in, stamp the session id on the current span — anywhere inside a @prometa.workflow / .agent / .tool / .task block:

from prometa import set_session_id

@prometa.workflow(name="handle-turn")
async def handle_turn(conversation_id: str, user_message: str):
    set_session_id(conversation_id)   # any opaque key your app uses
    # ... do the work; nested spans inherit automatically

Or, when the id is known at decorator time, use the session_id= kwarg:

@prometa.workflow(name="handle-turn", session_id=conversation_id)
async def handle_turn(...): ...

Either form writes the OTel-standard gen_ai.conversation.id attribute onto the span; the platform ingest reads it (and accepts session.id or prometa.session_id as fallbacks for non-Prometa producers) and propagates it onto every span + the trace row at write time. Nothing else needs to be configured.

Use opaque ids, not user-identifying values. The session id is indexed and visible to anyone with traces:read permission. Don't stuff emails, names, or PII in there.

Session retention mirrors trace retention (currently 365 days). Long-running sessions touching old + new traces will appear truncated once the oldest member trace ages out — acceptable for chat workloads, flag if you have multi-week audit needs.

LLM client auto-instrumentation

For traces to show token usage, cost, and prompt/completion text, opt in to the per-client patcher matching the LLM library you use. Without this, spans render but the cost panel reads $0.000 and the trace UI has no prompt/completion to display.

from prometa import Prometa
from prometa.integrations import openai as prometa_openai
from prometa.integrations import anthropic as prometa_anthropic
from prometa.integrations import google as prometa_google

Prometa(endpoint=..., agent_name="my-agent")

# Call install() once at startup. Each returns False (no-op) if the
# corresponding library isn't installed — so it's safe to call all three.
prometa_openai.install()
prometa_anthropic.install()
prometa_google.install()

Once installed, every client.chat.completions.create(...), client.messages.create(...), and client.models.generate_content(...) call (sync, async, and streaming) emits a child span carrying:

• gen_ai.system (openai / anthropic / google)
• gen_ai.request.model, temperature, top_p, max_tokens
• gen_ai.usage.input_tokens / gen_ai.usage.output_tokens → drives cost
• gen_ai.prompt (truncated JSON of input messages)
• gen_ai.completion (truncated assistant reply)
• gen_ai.response.id, gen_ai.response.model, gen_ai.response.finish_reasons

Streaming spans propagate context properly — any @prometa.tool / @prometa.agent invoked from inside the stream consumer nests under the LLM span, not under whatever was active when .create() returned.

How the trace "Conversation" panel populates

The Prometa trace UI renders a Conversation panel that derives turns directly from the span attributes emitted by the integrations on this page. For each LLM span:

• The user turn shows gen_ai.prompt.user — the latest role: "user" message, pre-extracted by the SDK from the messages / contents array at instrumentation time.
• The agent turn shows gen_ai.completion — the assistant reply.

Token counts and timestamps come straight off the span. Nothing else needs to be wired up on the platform side.

gen_ai.prompt (the full messages-array JSON) is also captured for debugging — that's what downstream judge / replay tooling reads when it needs the complete prompt context, including system instructions and history. The Conversation panel intentionally surfaces only gen_ai.prompt.user to keep the chat view readable; the full payload is one click away on the span detail.

The After preprocessing vs Raw toggle is also rendered, but both modes show the same text until the platform's PII redactor / policy gate ships and starts populating the prometa.conversation_turns table. When that lands, the panel will switch back to reading the processed-vs-raw pair from that table; the SDK contract does not change.

Reliability & retry semantics

The SDK ships traces over OTLP/JSON with at-least-once delivery: a background thread flushes the in-memory span buffer every flush_interval_seconds (default 2.0), and on any send failure (network blip, timeout, slow server response) the spans are re-buffered and retried on the next flush.

The platform deduplicates by id at the storage layer. prometa.spans and prometa.traces are backed by ClickHouse's ReplacingMergeTree (or SharedReplacingMergeTree on ClickHouse Cloud), keyed by (trace_id, span_id) and (org_id, trace_id) respectively. Any number of duplicate sends of the same span collapse to a single row during background merges; user-facing read paths (trace explorer, session explorer, conversation panel, cost panels) use SELECT … FINAL to enforce dedup at read time too. Cost and token aggregates are not inflated by retries.

Net: use the default flush_interval_seconds=2.0 even on long-running requests (RAG pipelines, multi-round tool loops, chat turns spanning tens of seconds). No consumer-side workaround needed.

If you previously raised the interval (e.g. to 120.0) to dodge platform-side double-counting in the cost / conversation panels, you can revert to the default. The platform-side dedup landed in the release alongside this SDK version (see CHANGELOG.md).

Configuration

Param	Env var	Default
endpoint	—	required
api_key	PROMETA_API_KEY	none
solution_id	—	none
agent_name	—	"prometa-agent"
stage	—	"development"
flush_interval_seconds	—	2.0

License

Apache-2.0