[fatal-guard] CI smoke test: npm install + crash capture + tombstone output

[Ikalus1988]

Goal

Add a minimal CI smoke test for fatal-guard that verifies the full crash→tombstone→draft chain.

Context

fatal-guard has CI (dependencies:
FAIL: expected 0 dependencies) but it only runs unit tests. There's no end-to-end smoke test that proves:

1. npm install succeeds
2. A crash is captured
3. A tombstone JSON is produced
4. tombstone_to_draft.py converts it to a draft lesson

Scope

• Add tests/smoke.test.js that:
  • Spawns a child process that crashes
  • Captures tombstone JSON output
  • Validates tombstone schema (4 required fields)
  • Runs tombstone_to_draft.py --dry-run on the tombstone
  • Verifies draft lesson is valid markdown
• Add this smoke test to CI
• Run on Linux + Windows

Deliverable

• npm test includes smoke test
• CI runs smoke test on Linux + Windows
• Full chain: crash → tombstone → draft lesson works

Labels

ready, agent-friendly, zero-bounty

---

This repo is using Opire - what does it mean? 👇

💵 Everyone can add rewards for this issue commenting /reward 100 (replace 100 with the amount).
🕵️‍♂️ If someone starts working on this issue to earn the rewards, they can comment /try to let everyone know!
🙌 And when they open the PR, they can comment /claim #1011 either in the PR description or in a PR's comment.

🪙 Also, everyone can tip any user commenting /tip 20 @Ikalus1988 (replace 20 with the amount, and @Ikalus1988 with the user to tip).

📖 If you want to learn more, check out our documentation.

[Ikalus1988]

Implemented in main via maintainer integration.

Evidence:

• commit: 4b88f98 (merged via fast-forward)
• validation: packages/fatal-guard/tests/smoke.test.js passes (tombstone capture + draft lesson dry-run)
• CI: fatal-guard.yml runs on Linux + Windows matrix

Closing as completed.