Clear
Your agent works well but is completely undocumented, so when it misbehaves, engineers spend hours reverse-engineering what it's supposed to do.
How would you design the system for maintainability and operational clarity?
General Medium

Answer:

  1. Document behavior: Specify what the agent should do per scenario, so intended behavior is clear during debugging.

  2. Version artifacts: Track prompts, configs, and models, so any behavior maps to a specific version.

  3. Trace execution: Log every step with context, so misbehavior is inspectable, not mysterious.

  4. Define ownership: Assign clear owners per component, so someone always knows how each part works.

  5. Standardize structure: Use consistent patterns across the system, so engineers navigate it predictably.

  6. Maintain runbooks: Document common failures and fixes, so incidents resolve fast.

  7. Expose observability: Provide dashboards and traces, so operators see system state at a glance.

  8. Test as documentation: Keep evals that encode expected behavior, so specs stay executable and current.

Your agent gives good answers but users don't trust it because they can't tell when it's sure versus when it's guessing.
How would you design the system to communicate uncertainty and build user trust?
General Medium

Answer:

  1. Express confidence levels: Signal how certain the answer is, so users know when to double-check.

  2. Cite sources: Show the evidence behind claims, so users can verify rather than take it on faith.

  3. Admit limits: Say "I don't know" when unsure, so trust isn't broken by confident wrong answers.

  4. Distinguish fact from inference: Separate grounded facts from reasoning, so users see what's solid.

  5. Flag assumptions: Surface interpretations made, so users can correct wrong premises.

  6. Ground confidence in evidence: Base certainty on retrieval, not fluency, so it reflects real support.

  7. Show reasoning when helpful: Explain how answers were reached, so users can judge soundness.

  8. Be consistently honest: Never overstate certainty, so reliability compounds trust over time.

Your agent needs to hand off tasks to background workers, but sometimes the same task runs twice and other times it's dropped entirely.
How would you design reliable task queuing and delivery for agent workloads?
General Medium

Answer:

  1. Guarantee delivery semantics: Choose at-least-once with dedup, so tasks aren't silently dropped.

  2. Use idempotency keys: Deduplicate on the worker side, so at-least-once delivery doesn't cause double execution.

  3. Acknowledge on completion: Confirm tasks only when done, so failures re-queue instead of vanishing.

  4. Add dead-letter queues: Route repeatedly failing tasks aside, so poison messages don't block the queue.

  5. Persist queue state: Store tasks durably, so a crash doesn't lose in-flight work.

  6. Set visibility timeouts: Hide claimed tasks temporarily, so two workers don't grab the same one.

  7. Retry with backoff: Handle transient failures gracefully, so recoverable tasks eventually succeed.

  8. Monitor queue health: Track depth, age, and failures, so drops and duplicates surface early.

Your agent's behavior needs to comply with different regulations in different regions, but it currently applies one set of rules to everyone.
How would you design the system to enforce region-specific rules and compliance?
General Medium

Answer:

  1. Detect region: Determine the user's jurisdiction, so the right rule set applies to each request.

  2. Externalize rules: Store region policies as config, so compliance updates don't require code changes.

  3. Gate at a policy layer: Enforce region rules centrally, so compliance isn't left to the model's discretion.

  4. Control data residency: Route and store data by region, so residency requirements are respected.

  5. Apply region-specific prompts: Adjust behavior and disclaimers per region, so outputs meet local requirements.

  6. Validate against jurisdiction: Check outputs against applicable rules, so violations are caught before delivery.

  7. Audit per region: Log compliance by jurisdiction, so you can prove adherence to each regulator.

  8. Update as laws change: Wire in a process to refresh rules, so compliance stays current with regulation.

Your agent's latency spikes whenever it needs to call slow tools, and users abandon the session before the response arrives.
How would you design the system to keep users engaged during slow tool calls?
General Medium

Answer:

  1. Stream progress: Show intermediate status, so users see the agent is working, not frozen.

  2. Acknowledge immediately: Respond fast that the request is in progress, so the wait feels handled.

  3. Parallelize tool calls: Run independent tools concurrently, so total wait is the slowest, not the sum.

  4. Set expectations: Display estimated timing, so waiting feels intentional rather than broken.

  5. Return partial results: Deliver what's ready while slow tools run, so users get value sooner.

  6. Prefetch likely needs: Warm up probable tool calls early, so latency is hidden behind other work.

  7. Time out gracefully: Bound slow tools and fall back, so one slow call doesn't stall everything.

  8. Cache slow results: Reuse expensive tool outputs, so repeat requests skip the wait.

Your agent needs to work with third-party data that's often incomplete, inconsistent, or contradictory, and it produces confident answers from bad inputs.
How would you design the system to handle unreliable and conflicting data gracefully?
General Medium

Answer:

  1. Validate incoming data: Check completeness and format, so obviously bad data is caught before use.

  2. Detect conflicts: Identify contradictions across sources, so the agent doesn't silently pick one at random.

  3. Rank source reliability: Weight authoritative sources higher, so conflicts resolve toward trustworthy data.

  4. Surface uncertainty: Signal when data is incomplete or conflicting, so answers reflect real confidence.

  5. Handle missing data: Degrade gracefully on gaps, so absent fields don't produce fabricated values.

  6. Reconcile explicitly: Apply rules to merge conflicting data, so resolution is deliberate, not accidental.

  7. Cite sources: Attribute facts to origins, so users can judge reliability themselves.

  8. Flag for review: Escalate irreconcilable conflicts, so humans resolve what the system can't.

Your agent's answers are only as good as its retrieval, but users write short, keyword-poor queries that retrieve the wrong documents.
How would you design the system to improve retrieval for poorly-formed queries?
General Medium

Answer:

  1. Rewrite queries: Expand and clarify vague inputs, so retrieval works from a richer, more precise query.

  2. Use query expansion: Add synonyms and related terms, so keyword-poor queries still match relevant documents.

  3. Apply hybrid search: Combine semantic and keyword retrieval, so short queries benefit from both matching styles.

  4. Leverage context: Incorporate conversation history, so ambiguous queries are disambiguated by prior turns.

  5. Decompose complex queries: Split multi-part questions, so each piece retrieves the right context separately.

  6. Rerank results: Apply a cross-encoder, so weak first-stage retrieval gets corrected before generation.

  7. Ask for clarification: Prompt when queries are too vague, so retrieval isn't guessing on insufficient signal.

  8. Learn from failures: Mine bad-retrieval cases, so recurring query gaps get addressed systematically.

Your agent occasionally leaks internal system prompt details or reveals its instructions when users probe it with clever questions.
How would you design the system to prevent prompt and instruction leakage?
General Medium

Answer:

  1. Minimize sensitive content: Keep secrets out of prompts entirely, so there's nothing critical to leak.

  2. Filter outputs: Screen responses for prompt content, so instruction leaks are caught before delivery.

  3. Detect extraction attempts: Flag probing patterns, so leak attempts are recognized and refused.

  4. Instruct against disclosure: Tell the model not to reveal instructions, so casual probing fails.

  5. Separate secrets from prompts: Store credentials and logic outside the prompt, so they can't be extracted via it.

  6. Refuse gracefully: Decline meta-questions about instructions, so probing gets a firm but polite wall.

  7. Red-team for leakage: Test with extraction attacks, so vulnerabilities surface before attackers find them.

  8. Monitor for leaks: Track disclosure incidents, so recurring extraction vectors get patched.

Your agent handles customer requests across email, chat, and voice, but each channel behaves inconsistently because they were built separately.
How would you design the system for consistent behavior across multiple channels?
General Medium

Answer:

  1. Centralize the core: Route all channels through one shared agent, so logic and behavior stay consistent everywhere.

  2. Abstract channel specifics: Isolate formatting and I/O per channel, so the core reasoning stays channel-agnostic.

  3. Share memory across channels: Unify user context, so a conversation continues seamlessly when the user switches channels.

  4. Adapt output per channel: Format responses to each medium's constraints, so voice, chat, and email each fit naturally.

  5. Standardize policies: Apply the same guardrails everywhere, so safety and compliance don't vary by channel.

  6. Test each channel: Run evals per channel, so channel-specific quirks are caught before shipping.

  7. Handle channel limits: Respect length and latency differences, so each channel performs within its constraints.

  8. Monitor per channel: Track quality by channel, so inconsistencies surface as measurable gaps.

Your agent's retrieval returns good results, but the generation step ignores half of them and only uses the first document it sees.
How would you design the system to make generation use all relevant retrieved context?
General Medium

Answer:

  1. Rerank before generation: Order chunks by relevance, so the most useful context sits where the model attends best.

  2. Limit to relevant chunks: Drop weak results, so the model isn't diluted by low-value context.

  3. Position deliberately: Avoid burying key content in the middle, so important context isn't lost to attention gaps.

  4. Instruct synthesis: Tell the model to combine multiple sources, so it integrates rather than latching onto the first.

  5. Force multi-source citations: Require citing several documents, so the model must engage with more than one.

  6. Right-size context: Provide a focused set, not a flood, so the model can actually use everything given.

  7. Verify coverage: Check the answer reflects key retrieved facts, so ignored context is caught.

  8. Evaluate context usage: Measure how much retrieved content is used, so under-utilization surfaces as a metric.

Your agent needs to decide when it's confident enough to act autonomously versus when to ask for help, but it currently either always asks or never does.
How would you design the system to calibrate autonomy against confidence?
General Medium

Answer:

  1. Estimate confidence: Derive a confidence signal per decision, so autonomy can scale with certainty.

  2. Set action thresholds: Act autonomously only above a confidence bar, so uncertain cases get escalated.

  3. Tie autonomy to stakes: Require higher confidence for risky actions, so consequential decisions get more scrutiny.

  4. Escalate on uncertainty: Ask for help when confidence is low, so the agent doesn't guess on hard calls.

  5. Ground confidence in evidence: Base it on retrieval and verification, so it reflects real support, not fluency.

  6. Calibrate the threshold: Validate that confidence matches accuracy, so thresholds are trustworthy.

  7. Learn from outcomes: Adjust based on when autonomy succeeded or failed, so calibration improves.

  8. Monitor the balance: Track escalation and error rates, so over- or under-asking surfaces as a metric.

Your agent works in a regulated domain where every response must include specific disclaimers, but it inconsistently forgets to add them.
How would you design the system to guarantee required elements always appear in outputs?
General Medium

Answer:

  1. Enforce post-generation: Add required disclaimers in code after generation, so they're never dependent on the model remembering.

  2. Validate presence: Check outputs contain mandatory elements, so anything missing is caught and corrected.

  3. Use templates: Wrap responses in fixed scaffolding, so required parts are structurally guaranteed.

  4. Separate content from compliance: Let the model write content and code inject compliance, so the two don't interfere.

  5. Fail closed: Block outputs missing required elements, so non-compliant responses never reach users.

  6. Schema-enforce structure: Require designated fields, so mandatory sections are part of the contract.

  7. Audit compliance: Log presence of required elements, so you can prove and monitor adherence.

  8. Test rigorously: Verify required elements in every eval, so compliance gaps surface before release.

Your agent produces answers that are technically correct but tone-deaf — too blunt in sensitive situations, too casual in formal ones.
How would you design the system to control tone and appropriateness by context?
General Medium

Answer:

  1. Detect context: Infer the situation's sensitivity and formality, so tone can be matched appropriately.

  2. Specify tone in prompts: Instruct the desired register per context, so responses fit the situation deliberately.

  3. Adapt to the user: Adjust based on user signals and history, so tone reflects who you're talking to.

  4. Handle sensitive topics carefully: Route emotionally charged cases to gentler handling, so responses show appropriate care.

  5. Use examples: Show tone-appropriate responses per scenario, so the model imitates the right register.

  6. Filter inappropriate tone: Screen outputs for tone mismatches, so blunt or casual slips are caught.

  7. Evaluate on appropriateness: Score tone fit in evals, so regressions surface before shipping.

  8. Learn from feedback: Feed tone complaints back into design, so appropriateness improves over time.

Your agent needs to make external API calls that cost money per call, and a buggy reasoning loop once made thousands of calls before anyone caught it.
How would you design the system to protect against runaway external API spend?
General Medium

Answer:

  1. Cap calls per request: Set a hard limit on tool invocations, so a single request can't spiral into thousands of calls.

  2. Enforce spend budgets: Bound cost per request and per user, so runaway usage hits a ceiling automatically.

  3. Detect loops: Flag repeated identical calls, so a stuck agent is stopped before it burns the budget.

  4. Add real-time metering: Track spend as it happens, so limits are enforced mid-flight, not after the bill.

  5. Rate-limit externally: Throttle calls to paid APIs, so bursts can't accumulate massive cost quickly.

  6. Cache aggressively: Reuse recent call results, so redundant paid calls are avoided entirely.

  7. Require approval past thresholds: Gate high-cost operations, so unusually expensive runs get checked first.

  8. Alert on anomalies: Flag abnormal call volume, so runaway spend is caught the moment it starts.

Your agent's costs and behavior are fine in isolation, but when several agents share the same tools and resources, they interfere and cause contention.
How would you design the system to manage shared resources across concurrent agents?
General Medium

Answer:

  1. Control concurrency: Limit simultaneous access to shared tools, so agents don't overwhelm common resources.

  2. Use queues: Serialize contended access, so agents wait their turn instead of colliding.

  3. Add locking: Protect shared state with locks, so concurrent writes don't cause race conditions.

  4. Allocate quotas: Give each agent a resource budget, so one can't starve the others.

  5. Prioritize fairly: Schedule access by importance, so critical agents aren't blocked by low-priority ones.

  6. Isolate state: Namespace per-agent data, so agents don't corrupt each other's context.

  7. Rate-limit shared tools: Bound total tool usage, so shared APIs don't hit limits from combined load.

  8. Monitor contention: Track waits and conflicts, so resource bottlenecks surface and can be tuned.

Your agent needs to be tested before every release, but building a comprehensive test set by hand is slow and can't keep pace with your ship rate.
How would you design the system to generate and scale evaluation data efficiently?
General Medium

Answer:

  1. Mine from production: Convert real traffic into test cases, so evals grow automatically from actual usage.

  2. Generate synthetic cases: Use an LLM to create varied inputs, so coverage scales beyond hand-written examples.

  3. Augment edge cases: Programmatically create hard variants, so rare failures get systematic coverage.

  4. Auto-label with judges: Score outputs with calibrated LLM judges, so labeling scales without full manual effort.

  5. Validate synthetic quality: Spot-check generated cases, so bad synthetic data doesn't pollute the eval set.

  6. Stratify coverage: Ensure generation spans intents and difficulty, so the set stays representative, not skewed.

  7. Version generated sets: Track dataset provenance, so results stay reproducible and comparable.

  8. Blend with human curation: Mix synthetic with vetted real cases, so scale doesn't come at the cost of trust.

Your agent generates summaries that sound fluent and confident but sometimes omit critical information or misrepresent the source.
How would you design the system to ensure summaries are accurate and complete?
General Medium

Answer:

  1. Ground in source: Force summaries to derive only from provided text, so nothing is invented or extrapolated.

  2. Check faithfulness: Verify the summary against the source, so misrepresentations are caught before delivery.

  3. Ensure coverage: Confirm key points are included, so critical information isn't silently dropped.

  4. Cite back to source: Link claims to origin spans, so accuracy is verifiable and traceable.

  5. Preserve important structure: Keep essential facts, numbers, and caveats, so meaning isn't lost in compression.

  6. Flag uncertainty: Signal where the source was ambiguous, so the summary doesn't overstate confidence.

  7. Evaluate with rubrics: Score summaries on accuracy and completeness, so quality regressions surface in testing.

  8. Handle length trade-offs: Balance brevity against coverage, so shortening never sacrifices critical content.

Your agent's quality varies by time of day because your LLM provider's latency and reliability fluctuate under their own load.
How would you design the system to stay reliable despite provider-side variability?
General Medium

Answer:

  1. Multi-source inference: Spread traffic across providers, so one provider's bad period doesn't degrade everything.

  2. Fail over automatically: Switch providers on slowness or errors, so degraded performance triggers a fast path change.

  3. Set adaptive timeouts: Bound calls and retry elsewhere, so a slow provider doesn't drag every request down.

  4. Monitor provider health: Track latency and errors per provider, so you route away from struggling ones proactively.

  5. Cache to absorb variability: Serve repeats from cache, so provider fluctuations affect fewer live calls.

  6. Load-balance dynamically: Shift traffic toward healthy providers, so routing adapts to real-time conditions.

  7. Degrade gracefully: Fall back to smaller or local models, so users still get answers during provider trouble.

  8. Abstract behind a gateway: Route all inference through one layer, so failover and balancing are seamless.

Your agent needs to handle both structured queries (like database lookups) and unstructured reasoning in the same conversation, but it keeps confusing the two.
How would you design the system to route between structured and unstructured task handling?
General Medium

Answer:

  1. Classify intent first: Detect whether a request needs structured lookup or open reasoning, so it routes to the right handler.

  2. Separate the paths: Build distinct pipelines for each type, so structured and unstructured work don't interfere with each other.

  3. Use tools for structured: Route lookups to database or API tools, so precise queries return exact results, not guesses.

  4. Use reasoning for open tasks: Send ambiguous requests to the LLM, so nuanced questions get flexible handling.

  5. Combine when needed: Merge structured data into reasoning, so answers blend precise facts with interpretation.

  6. Validate structured outputs: Schema-check query results, so malformed data doesn't corrupt downstream reasoning.

  7. Handle mixed requests: Decompose into structured and unstructured parts, so each subtask gets appropriate handling.

  8. Monitor routing accuracy: Track misrouted requests, so confusion between the two surfaces as a fixable metric.

Your agent's behavior is defined by dozens of interacting rules and prompts, and changing one thing keeps causing unexpected regressions elsewhere.
How would you design the system to manage complexity and prevent regressions in agent behavior?
General Medium

Answer:

  1. Modularize behavior: Separate concerns into isolated components, so a change in one doesn't ripple unexpectedly into others.

  2. Test comprehensively: Maintain broad eval coverage, so regressions anywhere are caught before shipping.

  3. Version everything: Track prompts, rules, and configs, so any regression can be traced to a specific change.

  4. Isolate changes: Modify one thing at a time, so cause and effect stay clear and debuggable.

  5. Run regression suites: Compare against baselines on every change, so silent breakages are flagged automatically.

  6. Reduce coupling: Minimize interacting rules, so fewer hidden dependencies exist to break.

  7. Canary before full rollout: Test changes on limited traffic, so regressions surface small before going wide.

  8. Enable fast rollback: Keep instant revert ready, so a regression is recoverable in seconds.