External References
Priority-ranked study sources and gap-coverage matrix.
Curated by John · Updated for May 2026 · Companion to cheat-sheet and stem-decoder
What this file is: Every external study source I've evaluated, with quality assessment, what each is best for, and what gap topics from the official skills-measured guide it helped surface. Use this when you want to drill a specific weak spot from a primary source other than this prep folder.
| Rank | Source | Why this rank | Time |
|---|---|---|---|
| 1 | Official Anthropic Exam Guide (PDF) | Source of truth. Every subdomain, every Knowledge/Skill bullet, the 6 scenarios, the weighting. CertSafari and Paul's guide both derive from this. | 2 hr |
| 2 | Paul Larionov's GitHub guide (guide_en.MD) | 116 KB of dense theory chapters + per-domain notes + 12 worked example questions + 20-question practice test. Closest thing to a free official study manual. | 4-6 hr |
| 3 | CertSafari | 615 free practice questions with explanations. Reproduces the official skills-measured guide verbatim. Domain Mode for targeted weak-spot drill. | 4-8 hr |
| 4 | Anthropic Cookbook (GitHub) | Real code patterns. Most useful for the Tool Design / MCP / Agent SDK question types where seeing actual JSON schema + tool_use code locks in the concept. | 2-3 hr |
| 5 | CyberSkill mock exam | 60Q / 120-min proctor-style timer. Maintainer is a CCAF Early-Adopter pass-holder. Tests exam flow + endurance. | 2 hr |
| 6 | Claude Cert Guide (claudecertificationguide.com) | 30 lessons + 4-scenario mock. Format differs from official (their mock is 25Q/60min, not 60Q/120min) but lesson structure is clean. | 3-4 hr |
| 7 | Anthropic Skilljar courses (Claude 101, Building with Claude API, Intro to MCP, Claude Code in Action) | Use only if a specific concept isn't clicking. Don't try to watch all four — they cover too much off-exam material. | variable |
OFFICIALPDF
Claude Certified Architect – Foundations Certification Exam Guide
The 5 domains, every subdomain (1.1–5.6), the 6 scenarios, weights, target candidate profile, sample questions. Read this twice — once skim, once deep.
OFFICIAL
Anthropic Skilljar — CCA-F Access Request
Registration page. Confirms it's gated to Claude Partner Network companies. Validate your company's status here before scheduling.
OFFICIAL
Anthropic Academy
Houses the four Skilljar courses below. Personal emails are blocked.
COMMUNITYEXAM BANK
CertSafari — 615 free practice questions
HIGHEST VALUE for question volume. Reproduces the official Anthropic skills-measured guide verbatim. 615 questions across all 5 domains with explanations. Use Domain Mode after taking our Exam 1-5 to target whichever domain you're weakest in.
COMMUNITYEXAM BANK
CyberSkill CCAF Practice (Vercel)
Mirrors the actual exam UI most closely: proctor-style timer, blur-detection ("focus-loss event"), question palette with flag-for-review. Use ONE Sunday session to simulate exam day end-to-end.
COMMUNITYEXAM BANK
Claude Certification Guide — Mock Exam
Note their format differs from official (25Q/60min, not 60Q/120min). Treat their mock as a quick-drill warmup, not an exam simulation. Their 30-lesson curriculum at /learn is well-organized by domain weight.
COMMUNITYGUIDE
paullarionov/claude-certified-architect — guide_en.MD
The most complete free CCA-F study manual. Theory chapters cover: Claude API fundamentals (stop_reason, messages, system prompts), tool_use and tool_choice, Agent SDK and AgentDefinition, MCP servers/resources/isError, Claude Code (CLAUDE.md, rules, skills, plan mode, /memory, /compact), prompt engineering (few-shot, chaining, interview pattern), Message Batches API, task decomposition, escalation, error handling, context management, provenance preservation, built-in tools.
OFFICIALDOCS
Claude API Documentation
tool_use, tool_choice, message format, stop_reason, error responses. Drill the tool-use guide and the prompt-engineering section.
OFFICIALDOCS
Claude Code Documentation
CLAUDE.md hierarchy, @import, .claude/rules/, skills frontmatter, plan mode, MCP integration, CLI flags. Primary source for D3 questions.
OFFICIALDOCS
Claude Agent SDK Overview
AgentDefinition, Task tool, hooks (PostToolUse / PreToolUse), fork_session, --resume, multi-agent patterns. Primary source for D1 questions.
OFFICIALDOCS
Prompt Engineering Guide
Few-shot examples, structured output via tool_use, JSON schemas, explicit-criteria over vague instructions. Primary source for D4 questions.
OFFICIALCODE
Anthropic Cookbook
Real working examples of agentic loops, tool use, structured extraction with retry-and-validate, batch processing. Best for cementing concepts when reading prose alone isn't sticking.
OFFICIALCODE
Claude Agent SDK (Python)
Reference implementation. Read the AgentDefinition source, Task tool wiring, hook interface signatures. Stops you from inventing fake flags on the exam.
OFFICIALSPEC
Model Context Protocol
Spec, SDKs, reference implementations. isError flag, transports (stdio / SSE / streamable HTTP), resources vs tools vs prompts. Primary source for D2 questions.
| Course | Useful for | Skip if |
|---|---|---|
| Claude 101 | Foundation refresher — message roles, stop_reason basics, what context window means | You already know what a system prompt is |
| Building with Claude API | Hands-on tool_use, JSON schemas, structured output — heavily tested in D4 | You've built a working tool-use loop before |
| Introduction to MCP | D2 fundamentals — server scopes, tool descriptions, isError, transports | You've shipped a custom MCP server |
| Claude Code in Action | D3 fundamentals — CLAUDE.md, rules, skills, hooks, CI integration | You use Claude Code daily and know plan mode vs direct |
OFFICIALBLOG
Building Agents with the Claude Agent SDK
Deep dive on agentic architecture patterns. Covers hub-and-spoke, prompt chaining, parallelization, evaluator-optimizer with rationale. Often quoted in exam stems.
OFFICIALBLOG
Anthropic Engineering Blog (root)
Browse for posts on prompt engineering, multi-agent research, code review with Claude. Several exam scenarios derive from these case studies.
This matrix shows the topics where each external source added concepts beyond what was in our original cheat-sheet. Items marked NEW were added to Practice Exam 5 with original (non-copied) questions.
| Topic | Source | Status |
|---|---|---|
| errorCategory enum (transient/validation/permission/business) + isRetryable boolean | CertSafari · Paul's guide Ch. 10.1 | Already in cheat-sheet · drilled in Exam 5 Q17 |
| Multi-concern customer-request decomposition + parallel investigation + unified synthesis | CertSafari D1.4 | NEW · Exam 5 Q1 |
| Coordinator-mediated subagent communication (no peer-to-peer) | CertSafari D1.2 · Paul's guide Ch. 3.3 | Already in stem-decoder · drilled Q2, Q9 |
| Parallel Task tool calls in SINGLE coordinator response | CertSafari D1.3 | NEW · Exam 5 Q3 |
| fork_session for divergent exploration from shared baseline | CertSafari D1.7 · Paul's guide Ch. 3.6 | Already in cheat-sheet · drilled Q4, Q15 |
| Structured handoff to human (customer ID + root cause + recommended action) | CertSafari D1.4 · Paul's guide Ch. 9.3 | NEW · Exam 5 Q5 |
| PostToolUse hook for normalizing heterogeneous data (Unix/ISO/numeric → unified) | CertSafari D1.5 · Paul's guide Ch. 3.5 | Already in cheat-sheet · drilled Q6 |
| Dynamic adaptive decomposition vs fixed prompt-chain pipelines | CertSafari D1.6 · Paul's guide Ch. 8 | Already in cheat-sheet · drilled Q7 |
| Per-file local + cross-file integration pass (avoid attention dilution) | CertSafari D1.6 · Paul's guide Ch. 8.3 | Already in cheat-sheet · drilled Q8 |
| Splitting generic tools into purpose-specific (extract_data_points etc.) | CertSafari D2.1 | NEW · Exam 5 Q18 |
| MCP resources for content catalogs (reduce exploratory tool calls) | CertSafari D2.4 · Paul's guide Ch. 4.5 | Already in cheat-sheet · drilled Q19 |
| Incremental codebase exploration (Grep → Read imports → trace flows) | CertSafari D2.5 · Paul's guide Ch. 13.2 | NEW · Exam 5 Q21 |
| tool_choice forced specific tool (prerequisite extraction) | CertSafari D2.3 · Paul's guide Ch. 2.3 | Already in cheat-sheet · drilled Q22 |
| Scoped cross-role tools for high-frequency needs (verify_fact for synthesis) | CertSafari D2.3 | NEW · Exam 5 Q23 |
| context: fork in skill frontmatter for isolated sub-agent | CertSafari D3.2 | Already in cheat-sheet · drilled Q28 |
| argument-hint frontmatter for required params | CertSafari D3.2 | NEW · Exam 5 Q29 |
| allowed-tools frontmatter restriction | CertSafari D3.2 | Already in cheat-sheet · drilled Q30 |
| .claude/rules/ with YAML paths glob frontmatter | CertSafari D3.3 · Paul's guide Ch. 5.3 | Already in cheat-sheet · drilled Q31 |
| Interview pattern (Claude asks questions to surface considerations) | CertSafari D3.5 · Paul's guide Ch. 6.4 | Already in cheat-sheet · drilled Q35 |
| Test-driven iteration (write tests first, share failures to guide refinement) | CertSafari D3.5 | NEW · Exam 5 Q36 |
| detected_pattern field for false-positive analysis | CertSafari D4.4 | Already in cheat-sheet · drilled Q40 |
| calculated_total alongside stated_total for self-correction | CertSafari D4.4 · Paul's guide Ch. 6.6 | Already in cheat-sheet · drilled Q41 |
| "other" + detail string pattern for extensible enums | CertSafari D4.3 | Already in cheat-sheet · drilled Q44 |
| 4-hour batch submission windows → 30-hour SLA math | CertSafari D4.5 · Paul's guide Ch. 7.5 | NEW · Exam 5 Q45 |
| Multi-pass review with second INDEPENDENT instance (no generator context) | CertSafari D4.6 · Paul's guide Ch. 8.3 | Already in cheat-sheet · drilled Q46 |
| custom_id correlation for batch failure resubmission | CertSafari D4.5 · Paul's guide Ch. 7.3 | Already in cheat-sheet · drilled Q47 |
| Render-by-content-type (financial→tables, news→prose, technical→lists) | CertSafari D5.6 · Paul's guide Ch. 12.4 | NEW · Exam 5 Q52 |
| Publication/data-collection dates to prevent temporal-vs-contradiction confusion | CertSafari D5.6 · Paul's guide Ch. 12.3 | NEW · Exam 5 Q53 |
| Position-aware input (key findings at BOTH ends, not just one) | CertSafari D5.1 · Paul's guide Ch. 11.3 | NEW · Exam 5 Q54 |
| Coverage annotations in synthesis (FULL / PARTIAL — reason) | CertSafari D5.3 · Paul's guide Ch. 10.4 | NEW · Exam 5 Q55 |
| Crash recovery via structured agent state manifest + coordinator reload | CertSafari D5.4 · Paul's guide Ch. 11.6 | NEW · Exam 5 Q56 |
| Stratified random sampling of high-confidence extractions | CertSafari D5.5 | Already in cheat-sheet · drilled Q57 |
| PostToolUse hook trimming (40 fields → 5 relevant) before context fills | CertSafari D5.1 · Paul's guide Ch. 11.2 | NEW · Exam 5 Q58 |
| Structured claim-source mappings preserved through synthesis | CertSafari D5.6 · Paul's guide Ch. 12.1 | NEW · Exam 5 Q59 |
| /compact during extended exploration with verbose tool output | CertSafari D5.4 · Paul's guide Ch. 5.7 | Already in cheat-sheet · drilled Q60 |
All questions in our Exams 1-5 are original (written, not copied). Concept grounding came from: the official Anthropic CCA-F exam guide PDF, the CertSafari reproduction of the skills-measured guide, Paul Larionov's GitHub study guide, the Anthropic Cookbook, the Claude Agent SDK Python repo, the MCP spec, and Anthropic engineering blog posts on agentic architecture. No question text was lifted from CertSafari's 615-question bank, CyberSkill's 60-question mock, Claude Cert Guide's mock, or Paul's 32 example/practice questions.