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Read an empty example Bot PORT as unset, so NaN never reaches Bun.serve #411

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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -8,6 +8,10 @@ Newest first. `Unreleased` is what is on `main` and not yet tagged.

## Unreleased

### Example LangGraph and Mastra Bots no longer bind an ephemeral port on empty `PORT=`

An empty `PORT=` in compose or `.env` used to become `NaN` for those two example processes, so they listened on a random port while docs still named 4300/4400. They now use the same `listenPort` helper as `agent-bot`: empty is the documented default, and a prefix typo refuses to start.

## 0.0.8

### A desktop shell that installs OpenBot and then becomes it
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8 changes: 7 additions & 1 deletion examples/langgraph-bot/src/index.ts
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Expand Up @@ -10,6 +10,7 @@ import {
import { Annotation, END, START, StateGraph } from "@langchain/langgraph";
import { ChatOpenAI } from "@langchain/openai";
import { serve } from "bun";
import { listenPort } from "../../shared/listen-port";

/**
* A Bot written in LangGraph.
Expand All @@ -26,7 +27,12 @@ import { serve } from "bun";
* `computer_navigate` and still drives a governed browser.
*/

const PORT = Number.parseInt(process.env.PORT ?? "4300", 10);
const resolvedPort = listenPort(process.env.PORT, 4300);
if (!resolvedPort.ok) {
console.error(resolvedPort.reason);
process.exit(1);
}
const PORT = resolvedPort.port;
const MODEL = process.env.BOT_MODEL ?? "gpt-5.5";
/**
* `gpt-5.6-*` rejects function tools on `/v1/chat/completions` and needs the Responses API, which
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8 changes: 7 additions & 1 deletion examples/mastra-bot/src/index.ts
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Expand Up @@ -3,6 +3,7 @@ import { EventEncoder } from "@ag-ui/encoder";
import { openai } from "@ai-sdk/openai";
import { Agent } from "@mastra/core/agent";
import { serve } from "bun";
import { listenPort } from "../../shared/listen-port";

/**
* A Bot written in Mastra.
Expand All @@ -16,7 +17,12 @@ import { serve } from "bun";
* as `agent-bot` and the LangGraph example.
*/

const PORT = Number.parseInt(process.env.PORT ?? "4400", 10);
const resolvedPort = listenPort(process.env.PORT, 4400);
if (!resolvedPort.ok) {
console.error(resolvedPort.reason);
process.exit(1);
}
const PORT = resolvedPort.port;
const MODEL = process.env.BOT_MODEL ?? "gpt-5.5";
/**
* `gpt-5.6-*` rejects function tools on `/v1/chat/completions` and needs the Responses API, which
Expand Down