Add DeltaChat Channel

The adapter drives the @deltachat/stdio-rpc-server JSON-RPC subprocess directly, pure Node.js against the DeltaChat core library. Messages are delivered over email with Autocrypt/OpenPGP encryption.

Install

1. Copy the adapter and its registration test

Fetch the channels branch from the configured remote that carries it, then overwrite the skill-owned files with the canonical registry copies:

src/channels/deltachat.ts
src/channels/deltachat-registration.test.ts

2. Append the self-registration import

Append to src/channels/index.ts (skip if already present):

import './deltachat.js';

3. Install the adapter package (pinned)

@deltachat/stdio-rpc-server@2.49.0

4. Build and validate

pnpm run build

pnpm exec vitest run src/channels/deltachat-registration.test.ts

Both must be clean before proceeding. deltachat-registration.test.ts is the one integration test: it imports the real channel barrel and asserts the registry contains deltachat. It goes red if the import './deltachat.js'; line is deleted or drifts, if the barrel fails to evaluate (so the channel genuinely would not register), or if @deltachat/stdio-rpc-server isn't installed (the import throws), so it also implicitly verifies the dependency from step 4. Importing is safe: deltachat instantiates the rpc client only in setup() (at host startup), never at import.

End-to-end message delivery against a real email account is verified manually once the service is running, see Wiring and Troubleshooting.

Account Setup

A dedicated email account is strongly recommended, it will accumulate DeltaChat-formatted messages and store encryption keys. Not all providers work well with DeltaChat; check https://providers.delta.chat/ before picking one.