Y Combinator · Launch Video Breakdown: Hook, Pacing & Motion Design

Scene-by-scene timeline & spoken transcript

1. 0:00 – 0:07

   The Hook

   Introducing ReasonBlocks: Smarter, Cheaper Agents

   “(No spoken dialogue — A subtle riser leads into a synth melody, culminating in a significant sub-bass drop with a sustained synth pad.)”

   On screen

   Introducing ReasonBlocks YOUR AGENTS SMARTER AND CHEAPER WITH EVERY RUN

   Camera

   Static wide shot, then a subtle zoom out to reveal more text.

   Motion

   Text reveal with subtle easing, followed by a secondary text reveal with a slight delay.

2. 0:07 – 0:28

   Problem Agitation

   The Cost of Failure: Without vs. With ReasonBlocks

   “(No spoken dialogue — An impactful sub-bass drop introduces a rhythmic synth pattern. A sweeping riser leads to a melodic synth line, then a powerful sub-bass impact with a sustained synth chord.)”

   On screen

   Same task. Two outcomes. WITHOUT REASONBLOCKS Opus 4.7 · agent.run #a4c1 00:01 → read_file('auth.ts') 00:03 → parse_token() 00:05 C read_file('auth.ts') 00:08 → parse_token() 00:11 C read_file('auth.ts') 00:14 → parse_token() 00:17 C read_file('auth.ts') 00:20 → parse_token() Stuck in loop · 175k tokens · $4.20 · 31s LOOPING 1.2X ERROR REDO Same 2 calls repeating -- read_file 6 parse_token 4 failed retries WITH REASONBLOCKS Opus 4.7 · agent.run #b7e2 00:01 → read_file('auth.ts') 00:03 → parse_token() ■ REASONBLOCKS INTERVENTION ■ VS Resolved · 7k tokens · $0.20 · 4s RUNNING 1.2X ERROR 00:04 ✓ loop_guard - pattern #2814 reused 00:05 → verify_token(jwks) 00:06 → issue_session() 00:07 → return ok Loop caught in 2 retries pattern reused agent recovered

   Camera

   Static wide shot, then a split-screen reveal, followed by a subtle pan to highlight the 'WITH REASONBLOCKS' section.

   Motion

   Terminal-style text animation, progress bar fills, and a dynamic split-screen transition with a 'VS' element.

3. 0:28 – 0:43

   Product Reveal

   Mid-Run Correction & Agent Diagnostics

   “(No spoken dialogue — A subtle riser introduces a new melodic phrase, followed by a pronounced sub-bass drop with a rhythmic synth pulse.)”

   On screen

   MID-RUN CORRECTION Your agent gets stuck. We catch it mid-run. 1 2 3 4 5 6 7 8 correction applied RESOLVED No retries. No wasted tokens. AGENT DIAGNOSTICS See every run. Catch every failure. AGENT DIAGNOSTICS - RUNS #2832 STEP TIMELINE 1 read_file('auth.ts') 2 search_docs('oauth') 3 fetch('user_data') 4 parse_token() MONITORS streak call_count edit_revert redundant_read hedge COMPOSITE INTERVENTION COMPOSITE SCORE 48 gate - injection CLEAN CLEAN CLEAN FIRED 0.78 0.42 0.28 0.36 0.22 COMPOSITE SCORE 0.21 resolved INTERVENTION APPLIED Wrap parse_token() in retry-with- backoff; validate session afterwards. pattern - auth_token_retry - a2-coding retry_parse_token() validate_session() INJECT PASS resolved - 8.4K tokens saved

   Camera

   Static wide shot, then a subtle zoom into the diagnostic interface.

   Motion

   Sequential block animation, color changes to indicate status, and a dashboard UI reveal with animated data points and text highlights.

4. 0:43 – 0:56

   Feature Teaser

   Context Compression & Reasoning Library

   “(No spoken dialogue — A pronounced sub-bass drop with a rhythmic synth pulse continues, leading to a final, extended sub-bass impact and sustained synth pad.)”

   On screen

   CONTEXT COMPRESSION Keep what matters. Compress the rest. CONTEXT 100% T01 read_file('auth.ts') T03 fetch('/api/user') T05 read_file('mm.ts') T07 fetch('/api/roles') T09 read_file('users.ts') T02 search_docs('oauth') T04 parse_token() T06 validate_session() T08 log_event('ok') T10 fetch('/api/keys') CONTEXT 15% COMPRESSED READS auth / middleware / policy FETCHES user - roles - keys AUTH token verified - session valid 240k - 36k tokens -85% 42% MORE ACCURATE SWE-bench Pro 52% LOWER COST Zero quality loss 24% LOWER LATENCY Fewer steps, faster results REASONING LIBRARY Your reasoning library grows with every run. Unique to your workflow. REFACTOR #0921 - rename auth_token across repos trace RESEARCH #1190 - profile pandas merge memory trace

   Camera

   Static wide shot, then a subtle pan to reveal comparative data points, followed by a zoom out to a grid background.

   Motion

   Progress bar animation, side-by-side comparison with fading elements, and a dynamic grid background with individual tile color changes.

5. 0:56 – 1:02

   Call to Action

   ReasonBlocks: Every Agent Run, Made Smarter

   “(No spoken dialogue — The final, extended sub-bass impact and sustained synth pad lead to the track's conclusion.)”

   On screen

   ReasonBlocks EVERY AGENT RUN, MADE SMARTER. reasonblocks.com

   Camera

   Static wide shot, subtle background grid animation.

   Motion

   Logo reveal with text fade-in, subtle background grid animation.