Nitrosend

Use this as the single public Runx surface for Nitrosend customer operations. Local account runners bind the API key only to the local runtime. The hosted review-content runner calls one bounded provider.read operation whose Cloud adapter retains credential custody. No runner accepts an API key as skill input or returns one in a receipt.

This skill is not for Nitrosend customer-support administration or team Slack work. Those are product-operator concerns owned by the Nitrosend repository.

Choose the runner

• status (default): live account, brand, sender, domain, provider, warmup, and deliverability readiness.
• billing-status: read the current account subscription and eligible paid-plan catalog together. It creates no checkout; prepaid balance and add-funds readiness remain a distinct funding block in the status evidence.
• plan-checkout: re-read current billing and plans, approve one exact plan, create the idempotent hosted checkout or confirmed in-place plan change, then read billing again. A checkout URL is pending operator work, not proof of payment or activation.
• plan-checkout-status: reconcile one returned plan-purchase ID without creating another checkout. Use it after hosted approval, timeout, or an ambiguous client response.
• configure-sender: read, approve, update, and independently read back one explicitly selected brand's exact sender defaults. It configures no content, audience, campaign, flow, or delivery.
• analytics: live account, campaign, flow, or message insights.
• review-delivery: read-only content and preflight review. Flow review requires the exact immutable revision_id; campaigns and templates do not.
• review-content: read-only spam and accessibility review for bounded inline email content. It accepts no account entity, audience, delivery, or mutation input and is safe to compose behind a payment-as-access vendor endpoint.
• plan-campaign, plan-flow, plan-transactional, and plan-import: bounded agent judgment that produces a reviewable request without provider completion.
• compose-email: read the live Nitrosend authoring contract, let one bounded agent author its exact next call, and return authoritative MCP validation. It never persists a draft or gains delivery authority.
• apply-draft: apply exact reviewed arguments for a campaign, flow, template, segment, or remote image ingest. Image ingest validates the remote bytes and returns a durable Nitro-hosted brand-library URL. It never sends or activates.
• approve-delivery: approve a reviewed campaign or an exact flow revision without delivering.
• send-campaign: send or schedule an already-approved campaign after a fresh provider review and explicit approval.
• activate-flow: publish an exact already-approved flow revision after a fresh review and explicit approval.
• send-transactional: dry-run or send one idempotent message to one recipient.
• import-contacts: dry-run or import at most 100 inline consented records.
• import-contacts-csv: validate or upload a local CSV through Nitrosend's authorized direct-upload path. File bytes and signed URLs never enter the agent packet or receipt.
• import-status: make one bounded status read for an asynchronous import.
• segment-from-prose: internal planning lane for the current supported filter catalog; unsupported filters are rejected rather than approximated.

Use the current public https://nitrosend.com/SKILL.md, nitro_get_status, and the live MCP schema as product truth. Do not copy onboarding or tool schemas into another repo-local skill.

Safe operating sequence

1. Run status and stop on sender, domain, suspension, warmup, or account blockers.
2. Correct sender defaults only through configure-sender. Supply the public brand SID even when the credential currently defaults to that brand, plus the complete sender name, sender address, reply-to address, saved test recipients, and a stable idempotency key. The runner reads the selected brand before approval and independently reads it again after mutation. A missing brand SID, different readback brand, or changed field stops the operation; never fall back to an account default.
3. For email authoring, use compose-email so Nitrosend supplies current brand and memory context before the model writes. Treat its MCP validation as authoritative; repair in another bounded turn when requested. For other planning, use the matching planning runner.
4. Apply only validated arguments through apply-draft; that separate runner retains the approval gate and is the first persistence boundary. For a new vendor-site or free-stock image, use operation=ingest_image with its exact public URL and an honest description, then reissue the composition intent so the returned Nitro-hosted URL becomes a frozen image binding.
5. Run review-delivery before approval. For flows, carry the exact current revision_id unchanged through review, approval, and activation. Use approve-delivery separately so retries never combine approval-state mutation with recipient delivery.
6. Use send-campaign or activate-flow only after provider approval state is established. A fresh review and Runx approval gate are mandatory.
7. Give every sender update, real transactional send, campaign delivery, and import a stable idempotency key. Reuse that key after a timeout; do not mint a new one.
8. Treat completion as real only when the sealed receipt contains Nitrosend provider evidence. A plan receipt is not proof of send, schedule, activation, or import.

Plan billing

Nitrosend is the merchant for its account subscription. Runx governs the exact account operation and receipt, but it does not settle the operator's Stripe or Shopify payment and must not route this hosted checkout through spend.

Start with billing-status; select only a returned eligible plan_id. Call plan-checkout with one stable idempotency key and approve the exact selected plan once. The same approval derives Nitrosend's provider confirmation flag, so there is no second confirmation prompt. Reuse the key only for an unchanged request.

A returned checkout URL means the provider is awaiting the operator. Preserve its purchase_id and next_action, complete or abandon checkout outside the runner, and call plan-checkout-status later. Do not mint another checkout to poll. Only provider readback that reports activation is completion.

Prepaid balance is a separate Nitrosend product path. These plan runners refuse amount, currency, instrument, add-funds, and funding-purchase arguments rather than forwarding them through the shared billing MCP tool.

Contact import rules

Every import requires a stable source_id and a plain-language consent_basis. Purchased, scraped, or data-broker lists are refused.

For CSV imports, pass an absolute .csv path. The adapter computes metadata and checksum locally, reserves an authorized upload, streams the file directly to the returned public HTTPS host, finalizes with the signed ID, and discards the signed URL. The import is asynchronous; call import-status again as needed rather than keeping a resident polling loop.

Stop conditions

• Missing provider credential or brand context.
• Missing explicit brand SID or incomplete sender defaults for a sender update.
• Sender readback that resolves another brand or differs from the exact request.
• Unsupported operation, audience, segment filter, or lifecycle transition.
• Missing consent source, recipient, schedule time, or idempotency key.
• Failed provider review or preflight.
• Missing or denied approval.
• Missing plan or purchase identity, changed idempotent checkout input, prepaid funding arguments on a plan runner, or a request to treat checkout creation as payment completion.
• Any request to expose credentials, signed upload URLs, raw contact files, or unbounded provider responses.
• Any claim of completion without provider readback evidence.

Agent task contracts

The planning acts prepare exact downstream operations and never call the provider. compose-email-from-contract is different: the enclosing graph has already read authoritative MCP intent evidence, and the agent only authors a candidate for the graph's read-only MCP validation. No agent act persists or delivers.

The internal provider boundary emits nitrosend.provider_evidence.v1 for both successful and stopped operations. Consumers carry that packet unchanged; they do not reconstruct a smaller result shape or infer completion from raw transport output.

send-campaign

Build one campaign plan from the objective, current account-status JSON, and audience brief. Distinguish a campaign from a flow or transactional message. Require an explicit bounded audience, compliant sender readiness, review before approval, and a separate confirmation before send or schedule. Do not invent list or segment ids and do not claim delivery from this planning runner.

build-flow-plan

Build one event-triggered automation plan with a supported trigger and ordered steps. Route one-off broadcasts to send-campaign; never disguise them as a flow. Preview and creation may be planned before confirmation, but approval and activation must remain a separate confirmed delivery-control operation.

send-transactional-plan

Plan exactly one email or SMS to one named recipient. Require channel-specific content, a stable idempotency key, dry-run validation, and confirmation before a real send. Reject audience or list broadcasts and route those to send-campaign.

compose-email-from-contract

Read the composition_intent provider evidence supplied as the declared input or current graph context. It must contain a successful Nitrosend result with a composition contract, contract id, and next call. Return campaign_candidate with decision (ready, needs_input, or reject), exact arguments, rationale, and blockers.

For ready, begin from the contract's next_call, preserve its contract_id, set composition_mode to validate, and fill only the requested creative fields. Follow the supplied brand, memory, examples, hard constraints, design mode, and repair guidance. Never reconstruct omitted context, invent claims, add an audience or schedule, or request draft, approval, activation, testing, or sending. If the intent evidence or required contract fields are missing, return needs_input without fabricated arguments.

import-contacts-plan

Plan only consented contacts with a stable source, consent basis, bounded record count, channels, compliance checks, dry run, and confirmation before import. Refuse purchased, scraped, or brokered lists. Choose inline import only for the bounded inline path; use the CSV runner for larger local files, without copying file contents or signed URLs into the plan.

segment-from-prose-plan

Translate the brief only through filters and predicates present in filter_catalog_json. Return a concrete segment_request when every condition is representable. Reject unsupported event history, attribution, or compound semantics rather than approximating them with superficially similar fields.