Companion-repository half of the public launch.

Compatibility mapping: website flypythoncom/flypython.com v0.1.0 (a1d8fea, deployed) ↔ this repository v0.1.1 (db85cdd). The website consumes this content at the exact pinned commit via src/data/content-pin.json. Pushed tags are immutable — the earlier v0.1.0 tag stays on e420fca.

On this release train

• docs/repo-plan-0.1.0.md renamed to docs/repo-plan-0.1.x.md — community courses are a 0.1.x track, not part of the launch version
• Carried forward in the pin: six agent-tool courses' Skill-optional lesson 1 (EN+ZH), foundation M0 as optional extra credit, route challenge on site pages

Verification

make check green at the pinned commit: 12 courses verified, both paths verified.