Specification review keeps the network coherent. Practice evaluating proposals for clarity, edge cases, and backward compatibility.
Complete Step 1 // Required reading in the study plan above, then continue here. This closes the Lightning roadmap.
Step 2 — Context: interop first
Start with Review Club spec picks or open PRs on lightning/bolts.
Review checklist:
- What problem does this solve?
- How do existing nodes behave during rollout?
- What new failure modes appear?
- Are test vectors included?
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Done when: You can separate an implementation bug from a spec ambiguity in one example.
Step 3 — Practice: write the review (lab)
Pick a bolts PR or Optech Lightning note. Answer all four checklist questions. Note rollout risk for LND/CLN/LDK if relevant.
Checklist
- Problem stated in your own words
- Rollout / backward-compat considered
- Failure modes and tests called out
Done when: Lab evidence (URL + structured review) is complete. Complete the chapter quiz when prompted.
You now have a full Lightning builder path — from invoices to protocol review. Keep building, keep testing on regtest, and keep contributing.