> ## Documentation Index > Fetch the complete documentation index at: https://docs.decimal.ai/llms.txt > Use this file to discover all available pages before exploring further. # Group traces by agent or session with per-group rollups > Collapse the trace list into groups (by agent or session) with summary metrics per group — volume, error rate, eval pass/fail + avg score, avg duration, last activity. Honours the same filters as the list endpoint so a group's numbers match what `GET /traces?agent_name=` would drill into. Cost/token rollups are deliberately omitted (they need a per-trace LlmCall join); this view is for triage by volume/health, not billing. ## OpenAPI ````yaml /openapi.json get /api/v1/traces/group-by openapi: 3.1.0 info: title: DecimalAI Platform description: Agent Dataset Lifecycle Platform — Backend API version: 0.1.0 servers: [] security: - BearerAuth: [] tags: - name: traces description: >- Ingest, search, and inspect agent execution traces. A trace is the atomic unit of the platform — every other feature (evaluation, compatibility scoring, dataset building) operates on traces. Each trace is auto-tagged with the manifest hash of the agent that produced it. - name: eval-scores description: >- Push, fetch, and aggregate per-trace evaluation scores. Scores carry source provenance (built-in, DeepEval, LangSmith, custom) and feed the unified decision engine, which produces a keep / repair / replay / drop verdict per trace. - name: skills description: >- Manage reusable instruction blocks (SKILL.md files) that modify agent behavior. Skills are first-class manifest components — changes to a skill appear in your regression-check impact reports. Use these endpoints to create, version, fork, and sync skills with your local SKILL.md files. - name: manifests description: >- Register and inspect manifest versions. A manifest is a snapshot of your agent's structural identity (tools, prompts, models, skills) at a point in time. The SDK registers manifests automatically; these endpoints expose the underlying records. - name: datasets description: >- Build versioned SFT/DPO training datasets from manifest-classified, eval-scored traces. Datasets are reproducible — each version locks the manifest and filter set used to build it. Export as JSONL, Parquet, or push to HuggingFace Hub. - name: replay description: >- Re-execute historical traces against a new manifest version. Replay is the deferred-future capability for behavioral verification of agent changes. The SDK creates a replay batch, your worker executes each task, then submits results back here for eval scoring. - name: registry description: >- Browse and install community skills from the public skills registry. Each registry skill carries a SkillScore — an evidence-tiered quality composite computed from real-world evals, benchmarks, and ratings across organizations. Installing creates a fork in your org — edits don't affect the public version. - name: agents description: >- List and inspect agents, plus their multi-agent topology (orchestrator → sub-agent edges discovered from traces). Agents are identified by a stable agent_name string set in your SDK init() call. - name: import description: >- Bulk-import historical traces from another observability platform or a JSONL backup. Useful for migrating from LangSmith / Braintrust / Langfuse. Duplicate trace IDs are silently skipped — re-running an import is safe. paths: /api/v1/traces/group-by: get: tags: - traces summary: Group traces by agent or session with per-group rollups description: >- Collapse the trace list into groups (by agent or session) with summary metrics per group — volume, error rate, eval pass/fail + avg score, avg duration, last activity. Honours the same filters as the list endpoint so a group's numbers match what `GET /traces?agent_name=` would drill into. Cost/token rollups are deliberately omitted (they need a per-trace LlmCall join); this view is for triage by volume/health, not billing. operationId: group_traces_api_v1_traces_group_by_get parameters: - name: dimension in: query required: false schema: enum: - agent - session type: string description: >- Roll-up dimension: 'agent' (group by agent_name) or 'session' (group by session_id). default: agent title: Dimension description: >- Roll-up dimension: 'agent' (group by agent_name) or 'session' (group by session_id). - name: status in: query required: false schema: anyOf: - enum: - success - error - degraded type: string - type: 'null' title: Status - name: eval_verdict in: query required: false schema: anyOf: - type: string - type: 'null' description: Filter by eval verdict, or 'unevaluated' for no verdict yet. title: Eval Verdict description: Filter by eval verdict, or 'unevaluated' for no verdict yet. - name: agent_name in: query required: false schema: anyOf: - type: string - type: 'null' title: Agent Name - name: manifest_id in: query required: false schema: anyOf: - type: string - type: 'null' title: Manifest Id - name: target_manifest_id in: query required: false schema: anyOf: - type: string - type: 'null' title: Target Manifest Id - name: compat_status in: query required: false schema: anyOf: - type: string - type: 'null' title: Compat Status - name: search in: query required: false schema: anyOf: - type: string - type: 'null' title: Search - name: started_at_from in: query required: false schema: anyOf: - type: string format: date-time - type: 'null' title: Started At From - name: started_at_to in: query required: false schema: anyOf: - type: string format: date-time - type: 'null' title: Started At To - name: include_fixtures in: query required: false schema: type: boolean description: >- When false, drop platform-harness fixture agents from the roll-up — the UI's default. Ignored when agent_name is set. default: true title: Include Fixtures description: >- When false, drop platform-harness fixture agents from the roll-up — the UI's default. Ignored when agent_name is set. - name: limit in: query required: false schema: type: integer maximum: 500 minimum: 1 default: 100 title: Limit - name: Authorization in: header required: false schema: type: string title: Authorization - name: X-Workspace-Id in: header required: false schema: anyOf: - type: string - type: 'null' title: X-Workspace-Id - name: decimal_session in: cookie required: false schema: anyOf: - type: string - type: 'null' title: Decimal Session responses: '200': description: Successful Response content: application/json: schema: type: object additionalProperties: true title: Response Group Traces Api V1 Traces Group By Get '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' components: schemas: HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError securitySchemes: BearerAuth: type: http scheme: bearer description: Enter your API key (e.g. dai_sk_test_key_001) ````