# Reelier blog Engineering notes on recording agent runs, deterministic replay, and receipts — plain, sourced, no hype. Every post has a raw-markdown twin at `/blog//md` (frontmatter included) — agents read the .md, humans read the page. ## Posts (newest first) - 2026-07-21 — [Your OpenClaw cron burns 2,880 LLM calls a month. Here's the same job at zero.](https://www.reelier.com/blog/openclaw-cron-costs) — The documented cost of OpenClaw heartbeats, the first-principles math behind the bill, and how to replay the deterministic half of the job at 0 tokens. (raw markdown: https://www.reelier.com/blog/openclaw-cron-costs/md) - 2026-07-21 — [Scheduled agents re-learn the job every run. Replay the part that never changes.](https://www.reelier.com/blog/scheduled-agents-zero-token) — Claude Code Routines, Actions crons, and OpenClaw heartbeats made recurring agent runs normal. The token bill compounds on the part that never changes. (raw markdown: https://www.reelier.com/blog/scheduled-agents-zero-token/md) --- Reelier — agents make claims, Reelier writes receipts. AGPL-3.0. Site twin: https://www.reelier.com/index.md · Machine-readable summary: https://www.reelier.com/llms.txt