Prompts are out and loops are in. A normal prompt stops the moment Claude answers, so you become the one checking the work. A loop is a standing agent that runs on a schedule, grades itself against a goal you set, and reports back. Think of it as onboarding an employee. You write the role once, set when it runs, and it does the rest. Below are four you can copy and adapt to your own portfolio.
A normal prompt stops the moment Claude hands you an answer. Whether it is right or not, you are the one who reviews it, catches what is off, and prompts again. The work only moves when you push it.
A loop is different. You give the agent a standing job and a goal it can grade itself against. It runs on a schedule you set, checks its own output, and reports back only what crosses the line you drew.
Think of it as onboarding an employee, not firing off a question. You write the role once: what to review, what counts as worth flagging, and where to send the summary.
From then on it instructs itself. Every Friday, or the first of the month, it does the round you described and lands the result in front of you. You move from doing the task to setting the standard.
Any property investor with recurring work that follows a rule: chasing arrears, tracking renewals, watching new listings, reviewing rates. If you keep running the same check on a cadence, that check is a loop waiting to be written.
Every agent below is built from the same four parts. Get these right and the agent runs itself. Miss the second one and it quietly collapses back into an ordinary prompt.
The standing task, in plain language. "Review all activity across my portfolio." "Check new listings in my target areas." Describe it the way you would brief a new hire on their first day.
The numbers, dates, and thresholds that decide what is worth flagging. "A tenant more than 5 days late." "A rate at least 0.5 points below mine." This is the part that makes it a loop, because the agent can score its own output against it.
The cadence. Every Friday. The first of the month. Each morning before you open your laptop. The agent fires on its own, so you never have to remember to ask.
The channel you actually read. A Slack message, an email, a note. The agent delivers only what crossed the line, with the next step attached, so you act in minutes instead of digging.
Your goal has to be something the agent can grade itself against. "Find me a good investment" or "keep the portfolio healthy" cannot be checked, so the agent has nothing to measure and the report turns to noise. Use numbers, dates, and thresholds. That one discipline is the difference between an agent that earns its place and one you quietly switch off.
Operations, strategy, acquisition, and financing. Each one is a copy-paste loop. Replace the bracketed thresholds with your own numbers, set the schedule, and point it at where you want the summary to land.
You are my property manager. Every Friday, review all activity across my portfolio for the past week and tell me what needs my attention. Review: tenant requests, lease renewals, maintenance jobs, leasing activity, vacancies, arrears, and anything I flagged for follow-up. Flag a unit only when it crosses one of these lines: - Arrears: a tenant more than [5] days late, or a balance over [amount]. - Renewals: a lease expiring within [60] days with no renewal sent. - Maintenance: a job open more than [7] days, or marked urgent and unassigned. - Vacancies: a unit empty more than [14] days, or with no active listing. - Follow-ups: anything I marked for follow-up with no movement in [7] days. Send me a Slack with the 3 to 5 highest-leverage actions for the coming week. For each one, give the unit, the line it crossed, and the single next step. Leave out anything that did not cross a line. If nothing did, say so in one line.
You are my investment strategist. On the first of every month, evaluate my portfolio against my target investment criteria and my long-term goals, then tell me where reality is drifting from the plan. My target criteria: - Net yield: portfolio average above [X] percent, no single asset below [Y] percent. - Concentration: no more than [Z] percent of value in one area or building. - Leverage: portfolio loan-to-value below [X] percent, no single asset above [Y] percent. - Cash reserve: at least [N] months of mortgage and service-charge cover. - Goal pace: on track to reach [target: units, equity, or income] by [date]. For each criterion, tell me whether I am on track or drifting, with my actual number next to the target. For every drift, give me one corrective action. End with the single biggest priority for the month, and send the summary to my Slack.
You are my deal scout. Every [morning], check for new listings in my target areas and surface only the ones that fit my buy box. My buy box: - Areas: [list]. - Property type: [apartments, villas, etc.]. - Price range: [min] to [max]. - Minimum gross yield: [X] percent at a realistic market rent. - Minimum size: [X] sqft, [X] bedrooms. - Deal-breakers: [short lease, service charge over [amount], known oversupply, etc.]. For each listing that fits, give me the address, the asking price, the estimated gross yield with the rent figure you assumed, and one line on why it fits. Reject anything that misses the buy box and do not show it to me. If nothing fits, send one line saying so. Send the matches to my Slack.
You are my finance watchdog. On the [first] of each month, compare current mortgage rates against the loans on my portfolio and tell me where it is worth acting. My loans, per property: - [property]: rate [X] percent, fixed until [date], balance [amount], monthly payment [amount]. Flag a loan when either is true: - A comparable product today is at least [0.5] percentage points below my current rate. - A fixed term ends within [6] months. For each flagged loan, estimate the monthly and annual saving from refinancing at today's rate, note any early-repayment penalty I listed, and give me the one next step. If nothing crosses the line, say so in one line. Send the summary to my Slack.
Message me directly if you want to talk through which loop to build first and what thresholds make sense for your portfolio. If property is part of your plan, I can also walk you through the opportunities I am tracking right now.
Message me on WhatsAppThe prompt is the easy half. An agent that runs on a schedule needs two things wired up before it can do anything real, and there is a clear line where a loop stops being the right tool.
One-off questions do not need a loop; a normal prompt is faster. Neither does work where you make a fresh judgement call on every instance, or where you cannot write down a clear bar. A loop earns its place on recurring work with a goal you can put a number on. Everything else is just a prompt.
Start with one agent. The property manager is the easiest first win, because the rule for what matters is already in your head. Write it down as thresholds, set it to run on Friday, and read the first summary it sends.
Once one loop is earning its place, the rest follow the same recipe. Four agents across operations, strategy, acquisition, and financing turn a portfolio you chase into one that keeps you informed on its own schedule.
Every prompt in this 30-day series is one capability. FourthspaceOS bundles all of them into a single product: underwriting, comps, market research, deal sourcing, portfolio tracking, and investor reporting. The product runs natively on the same Anthropic agents and plugins you are learning to use this month.
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