5,700 Messages in 16 Days · Julian Kaiser

I built a skill that analyzes my AI agent sessions. 5,700 messages, 65 projects, 111 context switches per day. Here are the numbers.

Built a skill today that reviews my pi agent sessions over any date range. Ran it on Feb 1–16. Here is what came out.

The Numbers


Messages to AI	5,700+
Active days	16
Unique projects	65
Avg messages/day	~360
Avg projects/day	10
Avg context switches/day	111
Avg active hours	11
Peak day	Feb 3, 630 messages, 13 projects

~360 messages a day. One terminal. 65 different projects. Client work, infrastructure, personal tools, finance, content.

This is only my pi agent. Not counting my OpenClaw instance, not counting Codex sub-agents. Just pi.

Where Time Goes

Category	Count
Shipping (commit/push)	1,119
Building features	1,023
Testing/debugging	848
Building skills/agents	616
Code review/cleanup	304
Project management	240
Communication	148
Finance/billing	119
Deploying	111
Research	78

I spend almost as much time building skills (616) as building features (1,023). Every skill I build saves hours the following week. The system keeps building itself.

Feb 6

One day. 529 messages. 13 projects. 157 context switches.

Built an analytics platform from scratch (Wachturm), deployed it
Set up Tailscale private infrastructure, security reviewed
Built a lead gen pipeline for a client. Apify scrapers into Supabase into Slack
Cleaned up 1,500+ Readwise articles with auto-tagging
Drafted client emails in German about invoice matching
Analyzed December spending, migrated expense tracking to a new skill
Deleted 20+ old GitHub repos
Built 3 new skills
Logged hours, posted weekly updates, did code reviews

One terminal. No app switching.

The Skill

About 400 lines of JavaScript. Parses the .jsonl session files that pi stores in ~/.pi/agent/sessions/, extracts user messages, computes stats: daily breakdown, project distribution, hourly activity, work categories, skill usage, message lengths, first and last message of each day.

# Last 7 days
review.js

# Specific range
review.js --from 2026-02-01 --to 2026-02-16

# JSON for piping
review.js --json

Going to run this weekly now. Partly to see where time actually goes vs where I think it goes. Partly for content.

Available in the skills pack.