$28,335 Over 7 Months, 9,350 Commits: What One Developer's Coding Agent Logs Showed About Running Agents in Parallel
- Level Advanced
- Setup1–3 hrs (estimated)
- Evidence Some evidence
- CostNot stated in source
- No-codeNo
What they did
A developer analyzed seven months of his own Claude Code and Codex logs: 1,432 sessions and about 200,000 tool calls. Spend jumped 7.4x in April when he started running agents in parallel git worktrees instead of one conversation at a time. He stepped in about every 15 tool calls and interrupted runs 2,047 times, and only 0.7% of activity happened overnight. He had about 130 skills installed but used them 52 times, mostly one release chore.
How it went
dev.to post by the developer (Oct 26, 2026, cross-posted from his blog): $28,335 over 7 months across five harnesses, 1,432 sessions, 200,478 tool calls, 15 tool calls per human turn, 2,047 interrupts, 9,350 commits across 145 repos (he warns the commit count overstates output), 0.7% of tool calls between midnight and 6 AM, 130 skills installed vs 52 invocations
Worth knowing
- dev.to post by the developer (Oct 26, 2026, cross-posted from his blog): $28,335 over 7 months across five harnesses, 1,432 sessions, 200,478 tool calls, 15 tool calls per human turn, 2,047 interrupts, 9,350 commits across 145 repos (he warns the commit count overstates output), 0.7% of tool calls between midnight and 6 AM, 130 skills installed vs 52 invocations.
Prompt
Cleaned version rewritten from the source — not a direct quote.
Look at my coding agent session logs in [folder] for the last [N] months. Count sessions, my turns, tool calls and interrupts per tool, total spend by month, and activity by hour of day and weekday. Tell me how many tool calls the agent makes per message from me, which months my spend jumped and what changed in how I worked then, and which installed skills I actually use versus never touch. Put the results in a short report with a few charts.
Recommended
Try it in Grok Bot
- Copy the prompt (button below).
- Open Grok Bot chat and paste it. Replace any [bracketed] placeholders.
- Connect the listed tools (as needed) as connectors when Grok Bot asks.
- If the task repeats, ask: "Make this a daily routine."
Alternatives: the same prompt works in Claude Code, Codex, Claude, ChatGPT Agent, OpenClaw.
Set it up
Stack: Claude Code / Codex
- Read the original source for full context.
- Connect the tools your agent needs.
- Paste the prompt and replace [bracketed] placeholders.
- Run once manually and check the output before scheduling it.
Generic suggested steps, not from the source.
Evidence
dev.to post by the developer (Oct 26, 2026, cross-posted from his blog): $28,335 over 7 months across five harnesses, 1,432 sessions, 200,478 tool calls, 15 tool calls per human turn, 2,047 interrupts, 9,350 commits across 145 repos (he warns the commit count overstates output), 0.7% of tool calls between midnight and 6 AM, 130 skills installed vs 52 invocations
Source: Web · 2026-10-26 · Verified by us: not yet · Report broken or outdated