Trace Summary

observability.trace_summary

ProductionBounded custom (Class B)Deterministicstrictmoderatev1.0.0

No network

Overview

You send up to 100000 already-normalized spans and an optional attribute allowlist of at most 20 keys. The answer is duration, a critical-path approximation, service and operation counts, error counts, roots, orphans and the slowest spans. Only allowlisted attribute values are returned; everything else is dropped. This does not fetch traces or claim a causal root cause. A successful call costs 2 execution credits.

A bounded span batch needs a published summary that cannot leak unaudited attributes.

Reliability

OBS_TRACE_SUMMARY_INVALID — trigger: duplicate spanId; retryable: no; next: send unique ids. OBS_TRACE_SUMMARY_LIMIT_EXCEEDED — trigger: more than 100000 spans or more than 20 allowlist keys; retryable: no; next: split the batch.

Context footprint

Only allowlisted attribute values are returned. A successful call costs 2 execution credits.

When to use it

When a caller already holds normalized spans and needs counts, roots and a critical-path approximation.

When the traces still live in a backend, or when a causal root-cause narrative is required.

Scope

Note

Summarizes a bounded normalized span batch into duration, counts, roots, orphans and slow spans.

Non-goals

Does not fetch traces
Does not claim a causal root cause
Does not implement full OpenTelemetry semantics

Properties

IdempotentRetry safeStreaming supportedFile input supportedRequires external service

Capabilities

analysis

Cost & billing

Flat rate per invocation

MetercallsBillable onsuccessCost per call2 credits

File handling

Accepts file_refProduces file_refMax input10 MB

How we handle your data

Sensitive output possible

What this means

This skill may receive sensitive content and may return submitted, transformed, extracted, or reformatted content.

Squillify guarantees

Runs inside Squillify
This skill runs inside Squillify.
Payloads are not sent to an external service by this skill.
Squillify does not permanently store submitted payloads.
Telemetry records metadata only, not submitted content.
Submitted payloads are not used for training.
Submitted payloads are not reviewed by humans.
This skill does not target sensitive data.
The response may contain submitted or transformed content.

Your responsibility

Squillify does not determine whether submitted content is sensitive. Your application is responsible for deciding what data it is allowed to submit. Your application is responsible for securing the response.

Read the Microskill Data Handling Policy

Input schema

Field	Type	Required	Description
spans	array	Yes	Normalized spans, 0 through 100001 closed objects; runtime accepts at most 100000.
attributeAllowlist	array	No	Allowlist of 0 through 21 attribute keys; runtime accepts at most 20. Omit it to return no attribute values.

Output schema

Field	Type	Required	Description
spanCount	integer	Yes	How many spans were accepted.
rootCount	integer	Yes	How many spans have no parentSpanId.
orphanCount	integer	Yes	How many spans name a parent that is not in the batch.
errorCount	integer	Yes	How many spans have status ERROR.
durationNanos	integer	Yes	max(endNanos) minus min(startNanos) across the batch, or 0 when empty.
criticalPathNanos	integer	Yes	Longest root-to-leaf duration sum used as a critical-path approximation.
criticalPathSpanId	string	Yes	Span id at the start of the longest path, or empty when the batch is empty.
roots	array	Yes	Root span ids sorted lexicographically, 0 through 100000 strings.
orphans	array	Yes	Orphan span ids sorted lexicographically, 0 through 100000 strings.
services	object	Yes	Name to non-negative span count sorted by count then name — unconstrained RFC 8259 JSON items are not used.
operations	object	Yes	Name to non-negative span count sorted by count then name — unconstrained RFC 8259 JSON items are not used.
topSlowSpans	array	Yes	Up to 10 slowest spans as closed {spanId, name, durationNanos, status, attributes?} objects.

API contract

POST /v1/execute

curl

curl -sS -X POST "$BASE/v1/execute" -H "Authorization: Bearer $KEY" -H 'Content-Type: application/json' -d '{"skillKey":"observability.trace_summary","input":{"spans":[{"spanId":"root","name":"GET /orders","startNanos":0,"endNanos":40}]}}'

Integrations

TypeScript SDK

import { Squillify } from "@squillify/sdk";

const sq = new Squillify({ apiKey: process.env.SQUILLIFY_API_KEY });

const { output } = await sq.execute("observability.trace_summary", {"attributeAllowlist":["http.status_code"],"spans":[{"traceId":"t1","spanId":"root","name":"GET /orders","kind":"SERVER","startNanos":0,"endNanos":40,"status":"OK","service":"api","attributes":{"http.status_code":"200","secret":"drop-me"}},{"traceId":"t1","spanId":"child","parentSpanId":"root","name":"SELECT orders","kind":"SERVER","startNanos":5,"endNanos":25,"status":"ERROR","service":"api","attributes":{"http.status_code":"500","secret":"drop-me"}}]});

Errors

Code	HTTP	Retryable	Description
VALIDATION_ERROR	400	No	The request payload failed schema validation.
UNAUTHORIZED	401	No	Missing or invalid API key.
SKILL_NOT_ACCESSIBLE	403	No	The API key is not granted access to this skill.
SKILL_NOT_AVAILABLE_FOR_PLAN	403	No	This skill is not included in your current plan.
PLAN_ELIGIBILITY_UNAVAILABLE	503	Yes	Plan eligibility could not be decided. Retry after backoff.
SKILL_NOT_FOUND	404	No	The requested skill or version does not exist.
TENANT_RATE_LIMITED	429	Yes	Request rate limit exceeded. Retry after backoff.
QUOTA_EXCEEDED	429	Yes	Plan quota exhausted. Retryable once the quota period resets.
EXECUTION_TIMEOUT	504	Yes	Execution exceeded the allowed time budget.
OBS_TRACE_SUMMARY_INVALID	400	No	The request payload failed this skill's input validation.
OBS_TRACE_SUMMARY_LIMIT_EXCEEDED	429	No	A size, quota, rate, or time limit was exceeded.

Other limits

Limit	Value
Recommended inline bytes	32 KiB

Limitations

Does not fetch traces
Does not claim a causal root cause
Does not implement full OpenTelemetry semantics
Live trace query
Root-cause claims

How to call

POST /v1/execute (requires authentication)

Request bodyjson

{
  "skillKey": "observability.trace_summary",
  "input": {
    "attributeAllowlist": [
      "http.status_code"
    ],
    "spans": [
      {
        "traceId": "t1",
        "spanId": "root",
        "name": "GET /orders",
        "kind": "SERVER",
        "startNanos": 0,
        "endNanos": 40,
        "status": "OK",
        "service": "api",
        "attributes": {
          "http.status_code": "200",
          "secret": "drop-me"
        }
      },
      {
        "traceId": "t1",
        "spanId": "child",
        "parentSpanId": "root",
        "name": "SELECT orders",
        "kind": "SERVER",
        "startNanos": 5,
        "endNanos": 25,
        "status": "ERROR",
        "service": "api",
        "attributes": {
          "http.status_code": "500",
          "secret": "drop-me"
        }
      }
    ]
  }
}

Examples

A root and an error child report one orphan-free tree

Inputjson

{
  "attributeAllowlist": [
    "http.status_code"
  ],
  "spans": [
    {
      "traceId": "t1",
      "spanId": "root",
      "name": "GET /orders",
      "kind": "SERVER",
      "startNanos": 0,
      "endNanos": 40,
      "status": "OK",
      "service": "api",
      "attributes": {
        "http.status_code": "200",
        "secret": "drop-me"
      }
    },
    {
      "traceId": "t1",
      "spanId": "child",
      "parentSpanId": "root",
      "name": "SELECT orders",
      "kind": "SERVER",
      "startNanos": 5,
      "endNanos": 25,
      "status": "ERROR",
      "service": "api",
      "attributes": {
        "http.status_code": "500",
        "secret": "drop-me"
      }
    }
  ]
}

Expected outputjson

{
  "rootCount": 1,
  "services": {
    "api": 2
  },
  "criticalPathSpanId": "root",
  "criticalPathNanos": 60,
  "orphans": [],
  "spanCount": 2,
  "topSlowSpans": [
    {
      "spanId": "root",
      "name": "GET /orders",
      "durationNanos": 40,
      "status": "OK",
      "attributes": {
        "http.status_code": "200"
      }
    },
    {
      "spanId": "child",
      "name": "SELECT orders",
      "durationNanos": 20,
      "status": "ERROR",
      "attributes": {
        "http.status_code": "500"
      }
    }
  ],
  "errorCount": 1,
  "operations": {
    "GET /orders": 1,
    "SELECT orders": 1
  },
  "orphanCount": 0,
  "roots": [
    "root"
  ],
  "durationNanos": 40
}

Tip

Only http.status_code is returned; the secret attribute is dropped.

An empty span list is a successful zero summary