feat: make examples cumulative with carry-forward chain and capstone

Add three new sections to all 14 examples:
- "Carry Forward": what output feeds into later examples (01-10)
- "The Cumulative Path": alternative prompt building on previous output (02-10)
- "Now Try It Yourself": personalized template with transferable pattern (all)
- "Building On" callout connecting back to previous examples (02-10)

Add Example 14: Build Your Personal Agent - capstone that guides reader
through writing their own CLAUDE.md, creating a personal skill, connecting
a messaging channel, setting up automation, and testing end-to-end.

Update README with cumulative path diagram, two usage modes, and example 14.
Update GETTING-STARTED.md with cross-references to relevant examples.

17 files changed, 703+ lines added. The examples now form a coherent
learning path from "see what it can do" to "build your own agent."

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -24,7 +24,7 @@ ecosystem.
 ## Project structure
 
 ```
-examples/           13 numbered examples, each with a prompt.md
+examples/           14 numbered examples, each with a prompt.md
 security/           Permission modes, Auto Mode, hooks, NemoClaw comparison
 memory/             How cross-session memory works
 automation/         Cron, launchd, /loop, /schedule
@@ -43,7 +43,9 @@ This file (CLAUDE.md) is for instructions. MEMORY.md is for state.
 ## Rules for this project
 
 - This is a demo repo. Do not add dependencies or build steps.
-- Keep examples self-contained. Each should work independently.
+- Every example has a standalone demo prompt AND a cumulative path prompt.
+  Both must work. The standalone prompt requires no prior examples.
+  The cumulative prompt builds on output from previous examples.
 - All output files go in `pipeline-output/` or `briefings/`.
 - Do not modify files in `security/` or `hooks/` without reviewing
   the security implications.