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4 changes: 3 additions & 1 deletion src/oss/langchain/context-engineering.mdx
Original file line number Diff line number Diff line change
Expand Up @@ -408,7 +408,7 @@ Reference these files when answering questions.`;

// Inject file context before recent messages
const messages = [ // [!code highlight]
...request.messages // Rest of conversation
...request.messages, // Rest of conversation
{ role: "user", content: fileContext }
];
request = request.override({ messages }); // [!code highlight]
Expand Down Expand Up @@ -1353,6 +1353,7 @@ Dynamic response format selection adapts schemas based on user preferences, conv
// request.state is a shortcut for request.state.messages
const messageCount = request.messages.length; // [!code highlight]

let responseFormat;
if (messageCount < 3) {
// Early conversation - use simple format
responseFormat = simpleResponse; // [!code highlight]
Expand Down Expand Up @@ -1552,6 +1553,7 @@ Dynamic response format selection adapts schemas based on user preferences, conv
const userRole = request.runtime.context.userRole; // [!code highlight]
const environment = request.runtime.context.environment; // [!code highlight]

let responseFormat;
if (userRole === "admin" && environment === "production") {
responseFormat = adminResponse; // [!code highlight]
} else {
Expand Down