Add the COMPILER-API stream to CLAUDE.md's session-start router and a `## ⏯ Resume` block to CHECKPOINT-COMPILER-API.md (next action = sub-step 2.2, read order, build/verify, and the cross-arch snapshot-regen gotcha).
Add the COMPILER-API stream to CLAUDE.md's session-start router and a `## ⏯ Resume` block to CHECKPOINT-COMPILER-API.md (next action = sub-step 2.2, read order, build/verify, and the cross-arch snapshot-regen gotcha).