GML-2162: expose classic routing prompt for customization

[prinskumar-tigergraph]

User description

Keep mandatory functions routing for graph metadata; add a narrow exception for domain analysis that asks for stats instead of narrative text.

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PR Type

Enhancement

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Description

• Refines datasource routing precedence

• Adds document-analysis vectorstore exception

• Preserves graph metadata function routing

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Diagram Walkthrough

flowchart LR
  Q["User question"]
  H["History continuation"]
  F["Functions for graph metadata"]
  V["Vectorstore for document analysis"]
  Q -- "continues prior answer" --> H
  Q -- "graph/schema/count query" --> F
  Q -- "domain document statistics" --> V

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File Walkthrough

Relevant files

Enhancement

base_llm.py Refine LLM datasource routing prompt                                          common/llm_services/base_llm.py Strengthens mandatory functions routing priority for graph metadata. Adds structured counts and schema lookups as functions examples. Introduces a narrow document-analysis exception routed to vectorstore. Clarifies exception must not override graph, vertex, edge, or schema counts. +9/-1

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[tg-pr-agent]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Routing Ambiguity The new document-analysis exception is somewhat broad and could cause domain questions asking for statistics or data to route to vectorstore even when they are answerable through structured graph entities. Consider tightening the wording or adding regression examples/tests for borderline cases. ## Document analysis exception → `vectorstore` Use `vectorstore` (or `history` if the question clearly continues a prior answer) only for this case: - Domain / document analysis that asks for statistics or data **instead of** narrative text or description. - Examples: "backed by statistics of data instead of just reading from the text/description"; same intent plus a document topic (e.g. product stability trends). - Do **not** use this exception if the question asks for graph / vertex / edge / schema counts. - Do **not** broaden this exception. If the question could reasonably be a structured graph query, route to `functions`.