Third upstream sync for PR #2914: main c05b2d66 (rename chore #3330, 17
skill files) re-staled the generated skill-triggers registryDigest. Sole
conflict resolved by keeping our pretty-printed manifest + triggers and
recomputing registryDigest over the merged tree via the repo's own
context-pack-registry chain (validated by reproducing both sides'
committed digests on their own trees first). Gates: validate-context-
profiles PASS, plan-orchestrate tests fail 0, full run-all.js clean.