Add Chapter 12 certification and evidence-based learning path

[bdorlus]

What changed

Adds Chapter 12, Get Certified — Turn Agentic Skill into Defensible Proof, to Build With AI.

New curriculum

• Chapter guide with six linked lessons.
• Timestamped companion-video watch map for the Claude Certified Architect — Foundations course.
• Certification readiness brief and domain study matrix.
• Agent loop, Agent SDK, tool-contract, stop-reason, and synthetic-fixture labs.
• MCP, context, permission, prompt-injection, and trust-boundary lab.
• End-to-end Community Workshop Digest certification evidence pack.
• Scenario-defense exercises with worked patterns.
• Workshop/video production rhythm that turns each segment into watch → translate → build → break → verify → defend → reflect.
• Capstone bridge and precise claim ledger so learners do not confuse course completion, project evidence, and provider-issued certification.

Course integration

• MkDocs navigation includes Chapter 12 and the certification source log.
• README, syllabus, overview, repository inventory, and workload estimates updated from 54/11 to 60/12.
• Assessment path, paired diagnostics, competency map, and Chapter 12 checkpoint updated.
• Maintenance guide now points to the dated certification source log.

Source discipline

The chapter uses:

• Anthropic’s Claude Partner Network announcement
• Anthropic Claude Code and Agent SDK documentation
• MCP introduction and security guidance
• The companion freeCodeCamp video

Provider-specific exam details are labeled as video-reported and include a “verify before scheduling” boundary.

Validation

• Confirmed branch diff is limited to the new Chapter 12 curriculum, source log, navigation, inventory, assessment, diagnostics, and maintenance updates.
• Checked all new lesson files for a source-level H1.
• Checked chapter links, source links, timestamp links, lesson counts, checkpoint integration, and accidental literal newline artifacts.
• Performed beginner, experienced-engineer, and career-switcher review passes for accessibility, simulation fallback, technical depth, evidence quality, and claim boundaries.
• A local MkDocs build was not run because this workspace did not contain a checkout of the repository; the connected repository diff is ready for the repository’s normal CI/build checks.

Review focus

Please review the chapter’s tone, the CCA-F-specific framing, the desired lab depth, and whether the Chapter 12 checkpoint should be adjusted before merge.