v0.10.0 — Slack or Mattermost operating-boundary kit
A pullable 25-person Slack-versus-Mattermost decision kit with:
- a deterministic cost calculator and verifier;
- explicit managed, self-managed, and integrator-operated hybrid paths;
- a fillable operating-boundary worksheet covering hosting, upgrades, backups, calls, search, apps, identity, compliance controls, migration, and human operations; and
- current official source links plus clear separation of public prices, planning assumptions, and unknowns.
This is a planning scenario, not a customer migration benchmark or production Mattermost license quote.