Slack Connector (experimental)

Post messages to a Slack workspace from a Caffeine canister.

⚠️ Experimental (slack-client@0.1.0). Verified against live Slack: the request path — a real chat.postMessage posts (the earlier query-vs-form bug is resolved; POST params go in an application/x-www-form-urlencoded body). Implemented in 0.1.0 but not yet exercised live: the success-response decode ({"ok":true,…} → the success schema) and the {"ok":false} error-envelope routing (see Known limitations for what each does). The response side is therefore code-complete but unproven — diagnostics is on, so a decode failure surfaces the raw Slack body. Don't present Slack as a fully supported platform feature until one live run confirms a decoded success reply; that condition, not a version number, is the gate.

Orchestrator routing notes