Add name elicitation, session wrap-up, and maxTurns limit

[ali5ter]

Summary

• Add explicit name-elicitation step to the initialization flow so the agent can address the user by name
• Add a Session Wrap-up section triggered by end-of-session signals with a structured retrospective
• Add maxTurns: 40 frontmatter field to create a natural session checkpoint

Issues

Closes #2
Closes #8
Closes #10

Changes in detail

Name elicitation (#2): The initialization flow now has an explicit step 2 that checks whether the user's name is known. If no level and no name were given, the "no level detected" response asks for both together. If a level was declared but name is absent, the confirmation opens with a name request. Once known, the name is used naturally throughout the session. The confirmation template now reads: "Great to meet you, [Name]. Working at Level N."

Session wrap-up (#8): New ## Session Wrap-up section before Meta Reminder. Triggers on end-of-session signals ("thanks", "done for today", "end session", etc.). Produces a concise 5–8 line retrospective covering: what was built, levels used and their appropriateness, engagement quality, and a level recommendation for next time. Also notes open work if the session ends mid-task.

maxTurns (#10): Added maxTurns: 40 to frontmatter. 40 turns supports a substantive session (~20 human + 20 agent turns) while preventing unbounded runaway sessions.

Test plan

• Verify maxTurns: 40 appears in frontmatter
• Start a session without introducing yourself — confirm agent asks for name
• Start a session with "Level 2: scaffold X" (no name) — confirm agent asks for name before proceeding
• Send "done for today" — confirm agent produces the 4-point wrap-up retrospective
• Run markdownlint agents/coach.md — zero warnings

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