... asked an agent to patch a simple null-pointer exception in a login handler. Instead of a quick three-line fix, it spun up an entire abstract factory pattern, created custom error classes, and restructured the whole authentication pipeline. For anyone deploying AI agents on day to day bug fixes how do you keep the scope minimal and prevent them from turning a tiny patch into a massive refactor? What prompts or rules do you use to force AI tools ...

... surface. The bug I remember most wasn't complicated. A form kept submitting twice. I blamed the framework, then the browser, then the network. Four hours in, I found it. My own validation logic was triggering the submit handler twice, and I had written it that way months earlier and forgotten. The bug was not in the tools. It was in my assumption about how my own code worked. I have tried to carry that forward. When something breaks ...

... asked Cursor to add input validation to a form handler. It reported editing three files. I checked git diff: two files changed. The third was a no-op. The agent had described what it planned to do, not what it did. I only caught it because I diff every change now. What's the last thing an agent claimed to do that it didn ...

... running a voice agent stack wasn't two agents touching the same file, it was two agents touching different files that both quietly assumed the same API contract. One changed a webhook payload shape, another changed how a downstream handler parsed it, neither file overlapped so nothing warned anyone, and it only surfaced at runtime. Same-file locking won't catch that. Have you thought about flagging overlap at the level of "these two diffs touch the same interface/schema" rather ...

... mixed together. Install the app, enable the theme app embed, and use Setup & health to verify a labeled test. The Free plan includes 500 detections/month. Order review stays under the merchant s control. The order-created handler does not independently cancel orders or block checkout. Cancellation requires a separately configured and enabled Flow action. Orders need matching session evidence, and clients that neither execute JavaScript nor touch a decoy may not appear in storefront reports. Short demo and setup ...

... Subscriber and call the plugin's admin-ajax action or REST route directly. A nonce stops a cross-site request, it doesn't stop a genuinely logged-in low-privilege user hitting the endpoint on purpose, and generated handlers very often check is_user_logged_in() where they needed current_user_can(). That reads perfectly fine in a diff. Second, call the same endpoint logged out: a register_rest_route with permission_callback missing, or set to __return_true ...

... that, and the part that bit us next was the test itself. Most of our rules of that kind are held by a test that scans the source: every signed-in route sits behind the onboarding gate, every error handler that shows a message to the user catches our refusal type and not the database failure, every heading font weight is preloaded. Those tests share a failure no agent will flag for you. If the scan matches nothing, it finds ... ... test did exactly that, because of a typo in its pattern, and it reported a clean codebase while examining nothing. So each of them now asserts how much it looked at before it asserts what it found: the error handler

... Spent way too long this week watching devs debug Paddle billing issues that never reproduced locally. The pattern keeps repeating: subscription.activated arriving before subscription.created in prod, about 30% of the time. Handlers look clean, pass unit tests, handle retries correctly. But they assume events arrive in order. Paddle's sandbox just doesn't reproduce that chaos. This comes up constantly with teams building on Lovable, Bolt, Base44. The AI writes the webhook handler

... guide, four hub pages and the API reference. My framework matches a route against the method list that route declares, and those declared GET alone. An undeclared HEAD matched no route at all and fell through to the 404 handler. The clients that send HEAD are the ones asking whether a page exists rather than asking for it. Link checkers. Uptime monitors. Shared caches revalidating a copy they already hold. That last one is what made this expensive rather than ...

... actual process for fixing that? Options I've seen people reach for: - Rewrite the description and hope. Cheap, but you're guessing at what confused it and you can't tell whether the rewrite helped. - Add logging in the handler. Works, but only shows what happened after the model chose. You never see the tool it nearly picked instead. - Merge tools into one with a mode parameter. Less to choose between, at the cost of a fatter interface. - Split ...

... follow the product page I would value it, and I would value even more hearing what breaks if you try it. Comment from Rabnoor Singh(@rabnoor_s): the thing that mints it is probably middleware that ran before your handler. any call that touches the session object, even a read, is enough in most frameworks to force a set-cookie on the way out. since you already narrowed it to the middleware group, worth checking whether the auth layer ...

... Nivy is: read the state back and treat the 200 as a hint. Comment from Siarhei Hamanovich(@hamanovich): Mostly per-service mocks. And the one that actually got us wasn't a vendor. Our version is a payment webhook. Handler writes an idempotency marker, does the work, a retry that sees the marker skips. Sounds right. Our driver has no transactions, so when a step under the marker threw, the marker survived. The retry read it, logged "already handled", returned ...

... happen. Most of what I'd hand to a daily agent is really a check that fires when something quietly stopped, a nightly job that exits 0 but produces nothing anyone opens, a webhook 200ing into a dead handler for a week. Recurring work I can already schedule, what I can't schedule is the noticing. Comment from Asad M.(@asadmalik901): @aymanhamed  Pull doesn't have to mean hosted. Write last run time and check count to a file ...

... back to Googlebot's user agent on that URL. We fetched ours that way and read the body instead of trusting the route table, and it was not clean. Every path containing a dot fell through to our locale handler and returned a 500, so the crawler was let in and handed an error while every checklist stayed green. That one is closed now. Our Search Console surface looked like yours: 294 indexable pages, 236 with no impressions ...

... When we finally looked at the serving layer instead of the content layer, the first thing we found had nothing to do with writing. Any path containing a dot, a png file for example, fell through to our locale handler and threw a 500. Googlebot was let in and then handed an error. We fixed that this week. We also turned off Cloudflare's AI bot blocking this week. That setting targets AI crawlers, not verified Googlebot ... ... only tells you about the pages that already rank. I do the same thing with ratios, report the number and forget which rows never made it in. The dot in the path falling through to the locale handler

... biggest measurement gap right now. Referral traffic only tells you when AI already sent someone your way. It doesn t tell you which prompts you appeared in, why you were chosen, or more importantly, all the prompts where a competitor was recommended and you weren t. That s why I think tracking actual model answers across a defined set of buyer intents is becoming the closest thing we have to Search Console for AI discovery. And your last point ... ... tackling that timing in the product. Comment from Ben Cohen(@bencohen): @serdarships   @niveditha_patluri1  That s actually really interesting. And yeah, treating it as a floor rather than a score makes a lot more sense. 0 vs

... stripe sends webhooks at-least-once. so what's the actual risk? one paid invoice, two deliveries, non-idempotent handler: you've just provisioned twice. you won't catch it in review because the code is correct on the first delivery. the bug only shows on the second. so how do you even reproduce it? I stopped reading and started running. took a real express and postgres billing app, replayed the scenario in a sandbox: same stripe webhook, delivered twice ... ... like a real retry. no prod involved. the buggy handler

... What happened A few weeks ago my coding agent wrote a Stripe webhook handler. Signature check, event type check, fulfillment, clean 200. I approved it in 90 seconds because every line was correct. And it was, until Stripe delivered the same event twice. Which it's allowed to do. Then the handler

... toggle was one of the things we turned off, and it was the right call regardless. But it was not our cause. Our cause was that unmatched dotted paths, /whatever.png, were falling through a route matcher into a locale handler and throwing a 500. Googlebot was being let in and then handed errors, and the symptom in Search Console was indistinguishable from being blocked. So the practical version of "write down why" I would add: before you conclude the Cloudflare ... ... coverage report is the concrete thing I'm taking from this. Different cadence, different granularity, and I'd have kept staring at coverage waiting for it to say something it structurally can't say. The absent-from-your-logs versus

... first. If it can't, we throw it away. Real example Ran it end-to-end on a billing bug: negative seat count slipping through and shrinking a customer's plan. It found the code path, drove the real handler, stubbed only the db as a passive recorder so the app's own logic decided the verdict. Confirmed the reproduction before trusting it. No hand-holding. Comment from Akbar B(@akbar_b): @rnagulapalle   Love that prove_fix is standalone ... ... edge than timing, honestly. ..today the generator works from the code path + known failure classes, not your real data distributions .. it doesn't peek at samples. What it can do is reason about what the code assumes vs

... stuff before prod, or mostly finding out when something quietly breaks? Comment from Arnold Oshenye(@oshylabs): Mostly catching it before prod now, but only after finding one the hard way. Early on I had an AI written Stripe webhook handler that looked complete and passed every test I threw at it. What it did not have was idempotency on the fulfilment step. A retry from Stripe during a slow response window double granted access on one account. Nobody complained ...

... went the other way. Point ours at your repo and say what's breaking "customers are getting charged twice." Instead of guessing which API, it reads your code : Sees you have both Stripe and Paddle installed. Reads both webhook handlers your Paddle one has no idempotency check (line 16); Stripe dedupes fine. Tells you: "it's your Paddle handler

... agent didn't just act, it acted with someone's credentials, someone's access, someone's blast radius. and when it goes wrong, the audit trail usually can't tell you what the agent was actually authorised to do versus what it happened to have access to. those are different things and most systems conflate them. honestly that's a big part of why we're building MonoCloud the way we are. scoped identity for agents so the blast radius ... ... your own past purchasing habits. In the case of the person whose agent has no prior purchasing habits to work/train off of, some of it may just have to come down to trial and error, or it prompting its handler

... free access, forever none of these show up in a 200. you find them from a customer or you fire the ugly event orders on purpose and find them first. we now throw every ordering + every duplicate at your handler and hand back the exact sequence that broke it. which of these has bitten you? (i've shipped #1 myself. be honest ...) Comment from Raj Nagulapalle(@rnagulapalle): @omri_ben_shoham1  The artifact distinction is the real one. Everything FetchSandbox ... ... landed on is the right one, keying off the subscription's current state instead of trusting event sequence is how this class of bug stops coming back. the ordering is a symptom; the real problem is handlers

... here handle alert noise, most of what we tried before this didn't hold up. https://www.producthunt.com/prod... Comment from Giorgi Gogitidze(@hhypnos): @vasyl_kyryliuk yeah that's the case that breaks the naive version of this, because the handler is often just a doorway. The move is to treat the async/cross-service edge as a continuation of the trace, not the end of it. When a handler