Maintaining Next.js 15 in 30 seconds: async APIs, caching, auth
Silent video: no voiceover, music or sound effects. This transcript repeats every on-screen word and describes each scene.
The film includes the topic label "Next.js 15 maintenance", the note "Illustrative diagram", the TecnoStack logo and progress numbers 1, 2, 3, 4, 5, 6. Elements enter and leave during transitions; in portrait, the closing sign-off replaces the footer.

[0:00–0:05] Beat 1 of 6 (intro)
Kicker: NEXT.JS 15
Headline: Maintain Next.js 15 deliberately
Support: Use version-specific documentation
Diagram (decision paths): Next.js 15; Maintain / migrate; Supported release
Connections: Next.js 15 → Maintain / migrate; Next.js 15 → Supported release
Highlighted: Maintain / migrate
Scene: Branching diagram: Next.js 15, Maintain / migrate, Supported release. Connections: Next.js 15 to Maintain / migrate; Next.js 15 to Supported release. Emphasis: Maintain / migrate.

[0:05–0:10] Beat 2 of 6 (step1)
Kicker: 01
Headline: Complete the async API migration
Support: Review helpers after the codemod
Diagram (flow): Request APIs; Codemod; Helpers; Type check
Connections: Request APIs → Codemod; Codemod → Helpers; Helpers → Type check
Highlighted: Helpers
Scene: Flow: Request APIs, Codemod, Helpers, Type check. Connections: Request APIs to Codemod; Codemod to Helpers; Helpers to Type check. Emphasis: Helpers.

[0:10–0:15] Beat 3 of 6 (step2)
Kicker: 02
Headline: Inspect every cache layer
Support: Defaults changed; some caches remain
Diagram (decision paths): Cache policy; Public data; Private data
Connections: Cache policy → Public data; Cache policy → Private data
Highlighted: Private data
Scene: Branching diagram: Cache policy, Public data, Private data. Connections: Cache policy to Public data; Cache policy to Private data. Emphasis: Private data.

[0:15–0:20] Beat 4 of 6 (step3)
Kicker: 03
Headline: Authorize every data access
Support: Treat actions as callable endpoints
Diagram (flow): Server entry point; Session identity; Authorization; Data source
Connections: Server entry point → Session identity; Session identity → Authorization; Authorization → Data source
Highlighted: Authorization
Scene: Flow: Server entry point, Session identity, Authorization, Data source. Connections: Server entry point to Session identity; Session identity to Authorization; Authorization to Data source. Emphasis: Authorization.

[0:20–0:25] Beat 5 of 6 (step4)
Kicker: 04
Headline: Compare real-user performance
Support: Use comparable devices and languages
Diagram (timeline): Field baseline; Release; Compare; Act
Connections: Field baseline → Release; Release → Compare; Compare → Act
Highlighted: Compare
Scene: Sequence: Field baseline, Release, Compare, Act. Connections: Field baseline to Release; Release to Compare; Compare to Act. Emphasis: Compare.

[0:25–0:30] Beat 6 of 6 (close)
Kicker: TECNOSTACK
Headline: Keep a tested maintenance plan
Support: Read the full guide
Diagram (evidence checklist): Security updates; Cache inventory; Isolation tests; Upgrade plan
Highlighted: Upgrade plan
Sign-off: TecnoStack logo and tecnostack.com
Scene: Comparison without scores: Security updates, Cache inventory, Isolation tests, Upgrade plan. Emphasis: Upgrade plan.