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feat(aio): show prompt config usage in code snippets #75847

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Merged
jurajmajerik merged 1 commit into from
Jul 31, 2026
+30 −6
Merged

feat(aio): show prompt config usage in code snippets #75847

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36 changes: 30 additions & 6 deletions products/ai_observability/frontend/prompts/promptSceneComponents.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -530,11 +530,15 @@ function buildPythonSnippet(
host: string,
projectApiKey: string,
variables: string[],
labelName?: string
labelName?: string,
showConfig?: boolean
): string {
const compileLines = variables.length
? `\nsystem_prompt = prompts.compile(result.prompt, {${variables.map((v) => `${JSON.stringify(v)}: '...'`).join(', ')}})`
: ''
const configLines = showConfig
? `\nmodel = (result.config or {}).get('model', 'your-default-model') # config stored with this prompt version`
: ''
const labelArg = labelName ? `label=${JSON.stringify(labelName)}, ` : ''
return `from posthog import Posthog
from posthog.ai.prompts import Prompts
Expand All @@ -546,7 +550,7 @@ posthog = Posthog(
)
prompts = Prompts(posthog)

result = prompts.get(${JSON.stringify(promptName)}, ${labelArg}with_metadata=True, fallback='You are a helpful assistant.')${compileLines}
result = prompts.get(${JSON.stringify(promptName)}, ${labelArg}with_metadata=True, fallback='You are a helpful assistant.')${compileLines}${configLines}
# result.name / result.version -> send as $ai_prompt_name / $ai_prompt_version on your LLM events`
}

Expand All @@ -555,11 +559,15 @@ function buildNodeSnippet(
host: string,
projectApiKey: string,
variables: string[],
labelName?: string
labelName?: string,
showConfig?: boolean
): string {
const compileLines = variables.length
? `\nconst systemPrompt = prompts.compile(result.prompt, {${variables.map((v) => ` ${JSON.stringify(v)}: '...'`).join(',')} })`
: ''
const configLines = showConfig
? `\nconst model = result.config?.model ?? 'your-default-model' // config stored with this prompt version`
: ''
const labelArg = labelName ? `label: '${labelName}', ` : ''
return `import { Prompts } from '@posthog/ai'
import { PostHog } from 'posthog-node'
Expand All @@ -570,7 +578,7 @@ const posthog = new PostHog('${projectApiKey}', {
})
const prompts = new Prompts({ posthog })

const result = await prompts.get(${JSON.stringify(promptName)}, { ${labelArg}fallback: 'You are a helpful assistant.' })${compileLines}
const result = await prompts.get(${JSON.stringify(promptName)}, { ${labelArg}fallback: 'You are a helpful assistant.' })${compileLines}${configLines}
// result.name / result.version -> send as $ai_prompt_name / $ai_prompt_version on your LLM events`
}

Expand All @@ -588,6 +596,8 @@ export function PromptCodeSnippets({ prompt }: { prompt: LLMPrompt }): JSX.Eleme
const snippetLabel = labelsEnabled
? (promptLabels.find((label) => label.name === 'production') ?? promptLabels[0])?.name
: undefined
// Same principle for config: only show the usage line once this prompt has one.
const showConfig = !!featureFlags[FEATURE_FLAGS.LLM_PROMPT_CONFIG] && prompt.config != null

return (
<div className="mb-6" data-attr="llma-prompt-code-snippets">
Expand Down Expand Up @@ -620,7 +630,14 @@ export function PromptCodeSnippets({ prompt }: { prompt: LLMPrompt }): JSX.Eleme
label: 'Python',
content: (
<CodeSnippet language={Language.Python}>
{buildPythonSnippet(prompt.name, host, projectApiKey, variables, snippetLabel)}
{buildPythonSnippet(
prompt.name,
host,
projectApiKey,
variables,
snippetLabel,
showConfig
)}
</CodeSnippet>
),
},
Expand All @@ -629,7 +646,14 @@ export function PromptCodeSnippets({ prompt }: { prompt: LLMPrompt }): JSX.Eleme
label: 'Node.js',
content: (
<CodeSnippet language={Language.JavaScript}>
{buildNodeSnippet(prompt.name, host, projectApiKey, variables, snippetLabel)}
{buildNodeSnippet(
prompt.name,
host,
projectApiKey,
variables,
snippetLabel,
showConfig
)}
</CodeSnippet>
),
},
Expand Down
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