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docusaurus — Session 2026-07-19 (Rail 5: Arbitrum canonical native-ETH docs)

Documentation for Rail 5 (spec in skybridge-v2 docs/superpowers/specs/2026-07-19-arbitrum-canonical-eth-rail-scope.md).

1. Docs ✅​

  • docs/skybridge/architecture.md: new "Rail 5: Arbitrum Canonical (native ETH)" section; "three rails" → "four rails" throughout; front-matter + index.mdx updated.
  • docs/skybridge/chains.md: new "Arb Canonical ETH" column (✓ Arb One + Robinhood, deposits-only); added a Robinhood Chain section (page previously had none — pre-existing gap since RH onboarding 2026-07-13).
  • docs/skybridge/tech-reference/entrypoint.md: Rail 5 routing + arbitrumInboxes registry (version →6.3.0).
  • New guide docs/skybridge/guides/bridge-arbitrum-eth.md; fixed bridge-op-standard.md (was steering Arbitrum ETH users to CCIP — now splits ETH→Rail 5 vs ERC-20/NFT→CCIP).
  • docs/references/official-addresses.md: the 4 verified Delayed Inbox addresses.
  • 7 granular commits d166f38…a35347f, merged + pushed to origin/main. npm run build passes.

State at session end​

  • All Rail 5 docs merged + pushed to origin/main (a35347f).
  • ⚠️ Pre-existing broken-anchor warning in official-addresses.md (AFX section, unrelated to Rail 5) left as-is. A stale working-tree deletion of AIRFOX_REBRAND_REPORT.md (not from this session) was left untouched.
  • OWED: none for Rail 5 docs.