Document billing usage and CLI empty-output recovery

content/docs/cli/quickstart.mdx

@@ -90,6 +90,9 @@ See [Concepts → Attach](/cli/concepts/attach).
 
 - Login succeeds but no models available — check [Available Models](/web/models)
   and the account plan. Account-backed login inherits managed hosted access.
+- A run says that the model returned no output — open `/model`. Choose another
+  model, then retry the task. Mogplex does not retry an empty response because
+  the retry can add cost.
 - Header says `transport: offline` — core is unreachable. Check network and retry; the daemon transport surfaces a reconnect banner.
 - A slash command "doesn't work" — check `/help` for the actual registry.
 

content/docs/plans-and-billing.mdx

@@ -61,6 +61,12 @@ The new balance appears after Stripe confirms the payment.
 Mogplex shows recent usage costs in Billing. These costs use the available
 inference-credit balance.
 
+Mogplex lists each model call after the cost settles. For a code review, the
+entry shows the repository and PR number. Billing rounds the displayed amount
+to the nearest cent. The credit ledger keeps the provider cost to eight decimal
+places. A new entry can take up to 10 minutes to appear while Mogplex confirms
+the final provider cost.
+
 | Usage | Rate |
 | --- | ---: |
 | Model inference | Model provider price, with no markup |
@@ -140,6 +146,8 @@ does not display or store the full card number in the Billing page.
 
 Select **Update payment method** to make changes in Stripe. Mogplex creates an
 invoice for each plan payment, add-on payment, and inference-credit payment.
+Usage charges appear in **Recent usage costs**. They do not produce Stripe
+invoices. They spend credit that is already in the account.
 
 Billing shows the latest 20 invoices. Select an invoice number to open its
 hosted invoice or PDF. Select **View all invoices** to open the complete Stripe

content/docs/support.mdx

@@ -20,6 +20,7 @@ repo coverage, routing, execution, and local CLI state.
 | Slack mention does not start repo work | [Slack](/integrations/slack), [Settings](/web/settings#slack), and [Observability Runbook](/guides/observability-runbook) |
 | Sandbox or preview launch is failing | [Sandbox Setup Checklist](/guides/sandbox-setup-checklist), [Vercel](/integrations/vercel), [Projects](/web/spaces), and [Sandboxes](/web/sandboxes) |
 | CLI signs in but does not inherit expected hosted state | [Settings](/web/settings), [CLI Authentication](/cli/guides/authentication), and [Configuration and Flags](/cli/guides/configuration-and-flags) |
+| CLI says that the model returned no output | Open `/model`. Choose another model, then retry the task. The CLI stops before an automatic retry can add cost. |
 | A slash command does not behave as expected | [Slash Commands](/cli/commands), [Slash Commands guide](/cli/guides/slash-commands), and [Custom Slash Commands](/configure-and-extend/custom-slash-commands) |
 | You need the API error shape or status code | [API Quickstart](/reference/api#quickstart) and [API Errors](/reference/api#errors) |
 | You need to know what is safe to share | [Security and Data Handling](/reference/security-and-data-handling) |