v15.4.0-canary.42

Core Changes

• [release] use @changesets/changelog-github for changelog format: #79040
• next.config.ts: Implement compiler.defineServer for server-only constants: #79225
• Always show warning if fetch cache limit hit: #79384
• feat(turbopack) Added sending events to log how long writing entrypoints to disk takes.: #79256

Misc Changes

• [release] couple next and @next/swc versions: #79036
• [release] use changesets/action for canary release: #79038
• [release] create empty changeset for next when no changeset found during canary release: #79049
• Unroll recursion in RuleCondition::matches This trades allocations due to Box::pin calls during recursion for an explicit stack and a tiny interpreter loop.: #79310
• Update Turbopack production test manifest: #79359

Credits

Huge thanks to @devjiwonchoi, @wbinnssmith, @ijjk, @Cy-Tek, and @lukesandberg for helping!