Courses / The FDE Engagement / The security review

Lesson 17 of 35 · PremiumCourse syllabus

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1. Technical discovery

Use the sales call to establish what you can actually deliver20 min · Free
Find the constraints that can invalidate the pilot before building it24 min · Free
Write the pilot proposal around a decision you can actually test28 min · Free with sign-in

2. Enterprise integration

Choose the integration path that meets the workflow and can be operated24 min · Free
Carry the caller’s permissions through every data and action boundary28 min · Free with sign-in
Make replay, quarantine and reconciliation part of the pipeline contract30 min · Free with sign-in

3. A model of their world

Give business definitions an executable home28 min · Free with sign-in
Keep link evidence, uncertainty and history in the query30 min · Free with sign-in
Make named actions safe to authorize, retry and recover30 min · Premium
Project: the query runs, the number is wrong, and finance cannot say why75 min · Free with sign-in

4. Deploying in their environment

Choose a deployment you can operate under the actual constraints26 min · Free with sign-in
Recreate the release and prove that its state can recover28 min · Premium
Build the diagnostics you will need when you cannot log in28 min · Premium
Lab: rehearse a customer release and prove the way back120 min · Premium

5. The security review

Bring a security review packet that supports a concrete decision26 min · Premium
Follow data copies through access, deletion and recovery30 min · Premium
Show the model’s data paths, enforced capabilities and audit evidence30 min · Premium

6. The model in production

An evaluation becomes a harness the day it can block a release24 min · Premium
Cost per unit of their work is the number, and it decides the architecture25 min · Premium
Every dashboard is green and the system has been getting worse for a month25 min · Premium

7. When the answer is a model

Write the rule first, even when you are certain it needs a model28 min · Premium
Your model scored 0.94 offline because a column knew the future28 min · Premium
A drift alarm is a reason to investigate before you retrain28 min · Premium

8. Agents with authority

Bound agent actions by authority, consequences and shared limits30 min · Premium
Recover partial runs without guessing whether an action happened30 min · Premium
Promote an action only when its evidence and operating controls are ready30 min · Premium
Enforce every agent's authority at one checkpoint the registry controls30 min · Premium

9. Proving it was worth it

Measure the baseline and distinguish time, capacity and cash28 min · Premium
Separate observed improvement from evidence of causation30 min · Premium
Write the review memo around a decision the evidence supports28 min · Premium
Lab: reconcile the pilot result before recommending expansion90 min · Premium

10. The craft around the work

Make the engagement survive a change of sponsor28 min · Premium
Push back with evidence, feasible choices and clear boundaries28 min · Premium
Transfer operation, decision-making and the ability to change the system30 min · Premium

11. Capstone

Capstone: reconcile and defend a complete engagement dossier420 min · Premium

Show the model’s data paths, enforced capabilities and audit evidence

Review inference data handling and prompt-injection consequences without treating prompts as permission controls. Run a restricted freight tool dispatcher, test denied actions, and distinguish an execution record from a causal explanation of model behavior.

30 MIN · PREMIUM

By FDEInterviews · Updated Oct 23, 2026

The mental model interviewers reward starts one level deeper than the definition: what the concept buys you, what it costs, and the single trade-off that decides when to reach for it.

Work the concrete example end to end, then name the failure mode most candidates miss — that is the signal that you have used this in production, not just read about it.

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PREVIOUSFollow data copies through access, deletion and recovery NEXTAn evaluation becomes a harness the day it can block a release24 min · Premium

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Read the related research

See all 14 related papers →

Free summaries. Key takeaways with a free account; deeper analysis with Premium.

2025 · 14 min breakdownPrompt injection design patternsSix ways to build agents that resist prompt injection by limiting what untrusted text can touch, worked through ten real applications. The trade is plain: every pattern gives up some generality.Read the summary →
2025 · 12 min breakdownLlamaFirewallMeta's open-source agent guardrails: a jailbreak classifier on inputs, an LLM auditing the agent's reasoning, static analysis on code. Together they cut AgentDojo attack success from 17.6% to 1.75%.Read the summary →
2024 · 13 min breakdownAgentDojoThe standard testbed for prompt injection against tool-using agents: 97 tasks, 629 attack cases, and a finding that the most capable models were often the easiest to hijack.Read the summary →

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Harness Engineering for Forward Deployed Engineers →

See where this mechanism sits in the harness around a model: the loop, the instruction map, verification, permissions, credentials, sandboxes, budgets and the customer eval. The 136-page guide carries the 2026 evidence beside each decision, two worked engagements and a tested Python companion. Preview three pages.