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Node.js PoC

This example consumes the publishable nanocodex package exactly like an external Node application. The Node host supplies the WebSocket, API key, and an ordinary JavaScript multiply tool; the Rust/WASM engine owns the agent lifecycle, tool loop, retained conversation, and follow-on response chain. Each accepted Turn resolves to a typed result containing finalMessage, usage, and a reusable session snapshot; this example prints only the final message.

From the repository root:

pnpm install --frozen-lockfile
OPENAI_API_KEY=... pnpm --filter nanocodex-node-example start

The start command also reads the repository's ignored .env file when present. The key remains in the Node process and is used by the Node WebSocket host; it is not compiled into the WASM artifact or the npm package.

The subagent example opts into the canonical Rust task tree compiled into the package's WASM. JavaScript spreads Subagents.create() into tools; Rust installs spawn_agent, submit_result, send_agent_message, list_agents, wait_agent, interrupt_agent, and close_agent for every child:

pnpm --filter nanocodex-node-example subagents -- "Review the JS API with whatever workers you need"

To run the keyless MPP path with a Tempo account managed by the Tempo Accounts SDK:

pnpm --filter nanocodex-node-example smoke:mpp
pnpm --filter nanocodex-node-example smoke:mpp -- "Explain MPP in one sentence."

The first run prints a Tempo Wallet device-code URL to authorize a locally persisted, one-day access key with 25 pathUSD and USDC.e limits. Later runs reuse that scoped P-256 key without asking the root wallet to sign each payment. The root wallet and delegated signer addresses are printed to stderr.

Stdout is flushed JSONL from agent.events.watch(); model output, payment diagnostics, and settlement details go to stderr so redirecting stdout produces a directly parseable trace:

pnpm --filter nanocodex-node-example smoke:mpp -- "Explain MPP in one sentence." > events.jsonl
jq -c . events.jsonl >/dev/null

The smoke uses standard reasoning with no thinking and priority processing, auto-swaps into the service currency, caps its payment channel at 0.05, opens a paid Responses WebSocket, and verifies a model turn. Channel state is persisted under ~/.tempo/wallet/nanocodex-mpp-channels.json and reused by default. Pass --close when you explicitly want to cooperatively settle instead:

pnpm --filter nanocodex-node-example smoke:mpp -- --close "Finish this turn and close the payment channel."