| **Project** | Your tenant. Owns keys, accounts, posts and a billing plan. |
| **API key** | `chirio_sk_...`. Authenticates every `/api/v1/*` call. Stored hashed — the raw key is shown once and never again. |
| **Social account** | One authorable identity on one platform: an Instagram professional account, a Threads profile, an X account, a LinkedIn profile or company page. |
| **Post** | One piece of content plus the list of targets it was sent to. |
| **Target** | The post as it landed on one account. Carries its own `status`, `url`, `error` and comment outcome. |