chore(ai-tutors): regenerate knowledge base for lesson-04-your-first-skill

[justinmclean]

Summary

Step-6 (debugging-skills) and step-7 (portable-skills) were added to the learning progression after this tutor was authored; the injector now adds them to the "Where to go next" section and renumbers the eval-driven- development reference from step-5 to steps-5–7.

Generated-by: Claude (claude-sonnet-4-6)

Type of change

• Skill change (.claude/skills/<name>/) — eval fixtures updated below
• Tool / bridge contract (tools/<system>/*.md)
• Python package (tools/*/ with pyproject.toml)
• Groovy reference impl
• Cross-cutting (RFC, AGENTS.md, sandbox, privacy-LLM)
• Documentation (docs/, README.md, CONTRIBUTING.md)
• Project template (projects/_template/)
• CI / dev loop (prek, workflows, validators)
• Other:

Test plan

• [X ] prek run --all-files passes
• For Python packages touched: uv run pytest / ruff check / mypy passes
• For Groovy bridges touched: command-line invocation tested end-to-end
• For skill changes: eval suite passes for the affected skill
  (PYTHONPATH=tools/skill-evals/src python3 -m skill_evals.runner tools/skill-evals/evals/<skill>/)
• For skill behaviour changes: a new or updated eval fixture is included in this PR
  (a regression test for the bug fixed / the behaviour added — see CONTRIBUTING.md)
• Other:

[potiuk]

Closing — superseded by #1010, which regenerated lesson-04 as part of fixing the nested-code-fence bug in the injector itself.

Worth recording why this is a close rather than a merge: the regeneration here now predates two source-page changes, so merging it would roll lesson-04 backwards:

	main (via #1010)	this PR
skill invocation	/magpie-write-skill	/write-skill
capability labels	capability:review, :fix, :intake	:security, :release, :contributor-growth

Neither difference is fence-related — they are ordinary content drift that #1010's regeneration picked up because it ran later. inject-knowledge-base.py --check on current main no longer lists lesson-04, so this PR's goal is already met.

lesson-08-eval-driven-development.md is still stale on main — it was stale before any of the fence work, from unrelated source-page edits. That one still wants a regeneration commit, and would be a direct follow-up to this.