Claude Certified Architect – Foundations: Independent Exam Prep

At twenty to eleven a dock door jams, and the assistant tells Luis that after-hours support runs until midnight at an extension that rings out. It had merged a March 2026 policy and a 2024 handbook into one unattributed paragraph, chosen the older one, and said nothing about a third lookup that timed out. Carry a claim-source mapping through synthesis so every stated fact keeps its document, excerpt and date, with citations or search-result blocks doing the mechanical part; annotate a conflict with attribution and dates for the knowledge owner to resolve instead of letting the summarizer pick; report unavailable coverage as not checked, never as none; and present hours as a table, the conflict as a sentence and tonight's steps as a list. Original HarborWorks case aligned to Claude Certified Architect – Foundations task 5.6 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Citations
- Search results
- Prompting best practices
- Reduce hallucinations

The dashboard says ninety-seven percent of extracted ticket fields are correct, and Kenji proposes skipping Rosa's review whenever the model reports confidence above point nine. Amara slices the month by document type and field and finds requested dates on forwarded email threads wrong one time in four, mostly with high confidence. Slice the headline from labeled data with a minimum count per cell; calibrate confidence against the labeled set per field and slice and set thresholds from the measurement, with "review regardless" where the top band misses the floor; sample what you trust with a stratified random draw and a tripwire; and write a review rule that spends the reviewer's time on the risky cases while a human still approves every filing. Original HarborWorks case aligned to Claude Certified Architect – Foundations task 5.5 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Define success criteria and build evaluations
- Reduce hallucinations
- Structured outputs

Mei's status investigation spans three days: a hundred and eighty files scanned on Monday, a teammate's merge on Tuesday that moves the export's status mapping, and a Wednesday resume that answers with "the typical pattern" because the session compacted and the summary turned forty-three read sites and twelve write sites into "several." Choose the way back by the validity of the prior context: resume and name exactly what changed, start fresh with a structured summary when the tool results are stale, and fork when two approaches share one analysis baseline. Keep the exact facts in a case facts block and a manifest that every prompt includes and the summary never owns; bound exploration with one question per subagent, a scratchpad and phase summaries, and write the manifest the next session loads before it does anything else. Original HarborWorks case aligned to Claude Certified Architect – Foundations tasks 1.7, 5.1 and 5.4 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Claude Code sessions
- Claude Code checkpointing
- Claude Code context window
- Claude Code subagents
- Claude Agent SDK sessions
- Compaction on demand
- Memory tool

Tomas runs a fourteen-thousand-ticket backlog through the path that serves staff, hits the live limits all night, and a blind rerun of the four hundred failed rows leaves nine hundred tickets classified twice. Sort work by whether someone is waiting and send the backlog to the Message Batches API at half the price; give every row an identifier that encodes ticket, taxonomy version and attempt, keep a ledger keyed on it and write idempotently so only failed rows go back; prove the prompt on a two-hundred-row sample and derive the submission cadence from the service promise. Original HarborWorks case aligned to Claude Certified Architect – Foundations task 4.5 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Message Batches API

Rosa's service desk gets three bad ticket drafts in one week: fields buried in prose, an invented "next Monday" for an email that gave no date, and a confident pick between two loading-dock printers. Kenji's uniform retry fixes one and makes the other two worse. Make the schema honest with nullable fields, enums that can say unclear, normalization rules and an invocation setting checked against the current documentation; show the judgment with two to four examples chosen for absence, ambiguity, normalization and document shape; then validate in layers and retry only with the source, the failed output and the exact errors, routing absent or ambiguous facts instead of resending. Original HarborWorks case aligned to Claude Certified Architect – Foundations tasks 4.2, 4.3 and 4.4 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Structured outputs
- Strict tool use
- Define tools and tool choice
- Prompting best practices
- Reduce hallucinations

Grace’s review bot posts twelve comments nobody reads, then reposts them on every push, and the one real problem ships: a routing change writes a field the Friday export doesn’t read. Write explicit report and skip categories with severity examples, run Claude Code non-interactively for schema-validated findings that are deduplicated and fail closed when output is missing, and have an independent instance review in two passes, local and cross-file. Original HarborWorks case aligned to Claude Certified Architect – Foundations tasks 3.6, 4.1 and 4.6 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Run Claude Code programmatically
- Claude Code CLI reference
- Claude Code GitHub Actions
- Claude Code best practices

Tomas reads "add ticket routing" as a four-minute mapping change, and the questions arrive after the demo: routing by building, priority to the on-call engineer, three services reading the queue field. Decide whether to plan from the shape of the change and a short interview, hand verbose discovery to an isolated subagent that returns findings with file references, and prove improvement with examples and tests written first, batching the fixes that interact. Original HarborWorks case aligned to Claude Certified Architect – Foundations tasks 3.4 and 3.5 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Claude Code permission modes
- Claude Code best practices
- Claude Code common workflows

Every sprint the service desk asks Hana for one more ticket field, and the first Claude Code attempt reads twenty files and edits the wrong occurrence. Decide what deserves a reusable skill, write it where the team gets it with declared arguments, pre-approved and disallowed tools and a forked context, and pick the precise tool for each question: Grep for contents, Glob for file names, Read for the needed sections and Edit with a unique anchor, with the three documented options when the anchor isn't unique. Original HarborWorks case aligned to Claude Certified Architect – Foundations tasks 2.5 and 3.2 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Use Skills in Claude Code
- Claude Code tools reference

Rafael’s first backend change broke two conventions that lived only in Ines’s personal instruction file. Map where instruction files live and who receives them, scope conventions to the files they describe with directory files and path-scoped rules, and prove a rule loaded before the edit instead of assuming it did. Original HarborWorks case aligned to Claude Certified Architect – Foundations tasks 3.1 and 3.3 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Manage Claude’s memory (CLAUDE.md and rules)
- Claude Code hooks

Theo’s knowledge server worked on his laptop and vanished for everyone else. Decide what belongs in the shared project configuration and what stays personal, keep each person’s credentials and access their own, and make the knowledge discoverable with descriptions the assistant actually reads and a catalog resource that tells it what exists before it searches. Original HarborWorks case aligned to Claude Certified Architect – Foundations task 2.4 (July 2026 v1.0 guide).

Independent exam preparation, not affiliated with or endorsed by Anthropic; personal views, no employer endorsement. Original examples only, no actual exam items, no credential guarantee.

These episodes cover selected decisions, not complete track coverage. Guide alignment uses the captured July 2026 v1.0 guide; check current official guidance before exam planning or implementation.

Public source credits:
- Claude Certified Architect – Foundations Exam Guide, July 2026 v1.0
- Connect Claude Code to tools via MCP
- Model Context Protocol specification