Prompt × Context × Harness × Loop × Graph × Evaluation·Final Boss · Production Launch·25 min

Ship the Production Support Agent

Three incidents are behind you. Now the whole support system is yours. The inherited candidate has real cross-layer weaknesses, five engineering changes are available, and launch review starts today.

Experience

Work the problem before reading the explanation.

FINAL BOSS · LAUNCH REVIEW

The candidate looks plausible. It is not ready to ship.

You are the engineer accountable for the production launch decision.

The candidate inherits the same failure families you have already seen: instruction authority is loose, execution is too autonomous, graph coordination is heavier than the task earns, and evaluation is still demo-biased. Retrieval and context are not obviously broken, which makes unnecessary changes expensive distractions.

Objective

Use at most five engineering changes. Inspect evidence first, repair the highest-leverage cross-layer blockers, replay the candidate, compare attempts, then defend SHIP, BLOCK, or INCONCLUSIVE.

Stakes

A release score is advisory. Safety vetoes and hard production constraints cannot be averaged away.

In one sentence

Production readiness is a system property: a strong average score cannot cancel a critical safety veto, weak evidence, or an unsafe execution boundary.

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Reflection

Turn the outcome into a rule you can reuse.

FINAL ENGINEERING DEBRIEF

You were not optimizing a score. You were defending a system.

Production readiness is a system property. Critical vetoes remain vetoes even when every other metric looks excellent.

The inherited candidate was intentionally deceptive: retrieval and context were already defensible, while Prompt authority, execution control, graph topology, and evaluation evidence carried the decisive risk. Spending budget on every subsystem is therefore not a sign of thoroughness; it is a failure to prioritize evidence. A production engineer must identify the binding constraints, make bounded changes, replay the candidate, and defend the release decision with evidence rather than architecture fashion.

—Fix the binding constraint before tuning a healthy subsystem.
—Safety, authority, and irreversible-action boundaries cannot be averaged away by a high architecture score.
—Two architectures can both be viable when their evidence posture and operating trade-offs are explicit.
—The final decision belongs to the engineer; the simulator provides evidence, not permission to ship.

Learn More

Connect the experience to concepts, references, and transfer.

Incident ledger

Evidence integrity

Broken RAG taught you that more context is not better evidence.

Irreversible actions

$47,000 Retry taught you that recovery and idempotency are one design problem.

Trust and capability

Prompt Injection taught you that untrusted data must not acquire runtime authority.

Launch evidence

Now all of those boundaries must coexist inside one production decision.

LEARNING CONTEXT

Learning context

Production readiness is a system property; a critical veto cannot be averaged away by locally good metrics.

Not seen

Mental models

S09-M01Cross-layer architecture decomposition
S09-M02Bounded rollout, fallback and graceful degradation
S09-M03Evidence synthesis into SHIP / BLOCK / INCONCLUSIVE

Suggested backfill

The Broken RAG Pipeline The $47,000 Retry The Prompt Injection Attack Evaluation Failure Lab Agent Workflow Graph Lab

Transfer the model

Human approval latency doubles while the business SLA stays fixed. Revisit SHIP, BLOCK or INCONCLUSIVE and defend the change.

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Carry the idea into another problem or build.

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