Open
Conversation
Add PromptTemplate and PromptCompiler utilities for {{variable}}
template compilation, matching the Python/JS SDK compile() behavior.
|
|
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Adds PromptTemplate and PromptCompiler under com.langfuse.client.prompt — no changes to Fern-generated code.
PromptTemplate handles {{var}} replacement and variable extraction. PromptCompiler wraps it for TextPrompt and ChatPrompt types so the usage feels similar to the Python/JS SDKs.
Tests cover basic replacement, missing/extra vars, null handling, edge cases for both text and chat prompts.
Closes #13
Scope
PlaceholderMessageexpansion (inserting message lists at placeholder positions) — not included in this PR, planned as a follow-upTest plan
PromptTemplate(basic replacement, missing/extra vars, null handling, whitespace, edge cases)PromptCompiler(text prompt, chat prompt, placeholder skipping, empty prompt)