Caching the outline cut reporting-agent deck generations by roughly two-thirds
manan_todi44 · reddit · 2026-07-21
After running a recurring reporting agent for months, the author found that the biggest cost saver was not prompt tuning but caching the stable outline in the middle of the pipeline.
What changed
- The agent still reads weekly data, reasons about changes, and produces a status deck.
- Instead of regenerating everything on every run, it now hashes a structured outline: headline plus three bullet points per section, with a hard length cap.
- If the underlying data has not changed enough to alter that outline, the render step is skipped and the previous deck link is reused.
Result
- Regenerations dropped by roughly two-thirds.
- Deck quality stayed the same, because the outline was the part that mattered.
- The key constraint was a small generation credit pool, around 50 renders per month on the author’s plan.
The general rule: the expensive part of an agent is often the piece you let it redo when nothing changed. Cache the stable artifact and only pay for the delta.
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