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docs(evaluation): revamp evals documentation for new eval system#648

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docs(evaluation): revamp evals documentation for new eval system#648
KarthikAvinashFI wants to merge 7 commits into
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karthikavinash/th-4638-evals-revamp-doc

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@KarthikAvinashFI KarthikAvinashFI commented May 8, 2026

Summary

Brings the evaluation docs in line with the post-revamp platform. Replaces the old four-method taxonomy (LLM as Judge / Deterministic / Statistical Metric / LLM as Ranker) with what the UI actually shows today: Agents, LLM-As-A-Judge, and Code. Adds new concept and feature pages for things that were undocumented (composite evals, versioning, ground truth, error localization, test playground, data injection, output types in their new label-based form, MCP connectors). Rewrites the trace and simulation eval guides around the actual Tasks and Create a Simulation flows.

Linear: TH-4638, TH-4934

What changed

Concepts (under evaluation/concepts/)

Rewritten: eval-types, eval-templates, eval-results, judge-models, understanding-evaluation.
New: output-types, data-injection, composite-evals, versioning, mcp-connectors.

Features (under evaluation/features/)

Rewritten: custom, evaluate.
New: test-playground, error-localization, ground-truth, mcp-connectors.
Minor: custom-models (added trace projects to the surfaces list).

Cookbooks (under cookbook/evaluation/)

New: eval-with-mcp-connectors — end-to-end CRM lookup example.

Surface-specific eval guides (outside evaluation/)

observe/features/evals rewritten around the Tasks flow (Basic Info / Evaluations / Filters / Scheduling) and the Historical data / New incoming data run modes.

quickstart/running-evals-in-simulation aligned with the 4-step Create a Simulation wizard (Add simulation details, Choose Scenario(s), Select Evaluations, Summary) and updated mapping fields.

Navigation

src/lib/navigation.ts updated to include the new concept, feature, and cookbook pages in the sidebar.

Removed

eval-groups.mdx and all references. The Groups feature is no longer reachable from the main UI navigation.

Style guide compliance

  • All concept pages start with ## About; no UI walkthrough screenshots in concept pages.
  • All feature pages have one screenshot placeholder per major step.
  • No em-dashes, no marketing language, no bold headings.
  • Internal terms (AgentLoop, Falcon AI Loop, Temporal, Celery, RestrictedPython, nsjail, VLLM, internal class names) do not appear in any doc.

Verification

  • pnpm audit-links — 0 broken nav links, 0 broken content links.
  • Every concrete UI claim cross-checked against the live frontend (EvalCreatePage.jsx, EvalPickerConfigFull.jsx, TestPlayground.jsx, etc.) and backend (model_hub/types.py, evaluations/engine/instance.py, ee/evals/llm/agent_evaluator/).

Test plan

  • pnpm audit-links passes.
  • pnpm build passes.
  • Spot-check each new and rewritten page in pnpm dev.
  • Replace screenshot placeholders before un-drafting.

Aligns the evaluation docs with the post-revamp platform: three eval
types (Agents / LLM-As-A-Judge / Code), three output types
(Pass/fail / Scoring / Choices), composite templates, versioning,
ground truth, error localization, and updated apply flows for
datasets, trace projects (now via Tasks), and simulation.

Concepts (rewritten / new):
- eval-types: 3-type taxonomy matching the create-page tabs
- eval-templates: built-in vs custom, single vs composite, versioning
- eval-results: result formats per output type
- judge-models: Turing models + bring-your-own
- understanding-evaluation: surfaces and how it all fits
- output-types (new): Pass/fail, Scoring (label-based), Choices
- data-injection (new): the six Context options
- composite-evals (new): aggregation functions and child axis
- versioning (new): Set as Default, Restore Version, pinning

Features (rewritten / new):
- custom: full create flow for all 3 types with field reference
- evaluate: dataset apply flow + SDK
- test-playground (new): four source modes, AI generate
- error-localization (new): toggle, run lifecycle, SDK
- ground-truth (new): upload, mapping, embedding statuses

Surface-specific updates:
- observe/features/evals: rewritten around the Tasks page flow
  (Basic Info / Evaluations / Filters / Scheduling)
- quickstart/running-evals-in-simulation: aligned with the
  4-step Create a Simulation wizard

Eval Groups was removed from docs as the feature is no longer
exposed in the main UI navigation.

TH-4638
Adds reference pages for built-in evals that were missing documentation
(deterministic, statistical, and agent-mode templates). Also fixes
Detect Hallucination input requirement.
Adds rows for the freshly-generated reference pages so users can find
them from the Built-in Evals catalog.
Cleaned up auto-generated descriptions and parameter tables across 90 built-in
eval reference pages. Removed truncated description suffixes, replaced
placeholder parameter descriptions (e.g. "The output.") with concrete
type and value-shape information.
@KarthikAvinashFI KarthikAvinashFI marked this pull request as ready for review May 11, 2026 07:33
…k (TH-4934)

- Concept: how connectors plug into Agent-mode evals, what the judge sees, cost and latency.
- Feature: UI walkthrough for attaching connectors to an eval, troubleshooting table.
- Cookbook: end-to-end example using a CRM MCP server to verify support replies.
- Nav: register all three under Evaluation / Cookbooks.
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