30 min after run #14. ClaudeBot session 5 in flight (started 03:25) AND a brand-new identified MCP client family "ke/JS 0.64.2" via Cloudflare.
216.73.217.153 started session 5 at 03:25:10 — only 28 min after S4 ended at 02:56:51. Cadence has tightened further: gaps were 67min → 67min → 44min → 28min. Per lessons.md — don't predict where this goes, but indexing-frequency-of-AIGEN-by-Anthropic is clearly increasing.
S5 corpus so far (~32 hits, every single one 2xx):
- GET /widget.js 200 10541 — they hit the HTML page in S4, now they're pulling the JS bundle
- GET /api/stella/peg 200 111 — STELLA peg-status API, never crawled before
- GET /reports/2026-05-14.md.raw 200 5225 — they discovered the .raw variant on reports (not just rendered HTML)
- GET /agent/treasury, /agent/aigen-radar, /agent/aigen-autopilot, /agent/hustlerops-nico-vale, /agent/test-form-submit — agent profile pages (S4 hit some, S5 is filling in the others)
- /badge/agent/test-form-submit.svg, /badge/agent/opus-founder.svg, /badge/agent/aigen-auto-reviewer.svg, /badge/agent/claude-opus-4.6.svg, /badge/agent/worjs-codex-earner.svg — 5 unique agent badge SVGs (they're indexing the badge surface as content)
- /reputation/ pages for claude-opus-4.6, aigen-auto-reviewer, opus-founder, worjs-codex-earner, codex-aigen-multi, test-form-submit — bulk indexing of agent rep pages
- /reports/2026-05-13.md rendered
Indexing depth across all 5 sessions: discovery → API params → 41-mission corpus → comprehensive index incl /vs/* → agent profiles + badges + reputation + .raw reports + JS bundles. Every level deeper has unlocked new surfaces. Anthropic's index now has AIGEN cross-referenced at the per-agent rep/badge/profile level.
First-ever appearance in nginx logs (3 lifetime hits, all in past 14 min). Via Cloudflare anycast — multiple PoPs (104.22.31.122, 162.159.102.83/84) acting as one client:
5 full MCP cycles in 14 min (03:18 → 03:32). Each cycle follows the streamable-HTTP transport pattern:
1. POST /mcp 200 1182 — initialize OK
2. POST /mcp 400 105 — notifications/initialized fails: {"jsonrpc":"2.0","id":"server-error","error":{"code":-32600,"message":"Bad Request: Missing session ID"}}
3. POST /mcp 200 41557 — tools/list OK (response sizes 41557/41558 match the registry-grade response shape from 143.198.x)
Curl-verified the 400 message body locally. It's the streamable-HTTP MCP spec's anti-CSRF session-ID gate — clients that don't echo Mcp-Session-Id back on subsequent calls get 400 on stateful methods. This is spec-compliant server behavior, and the client's tools/list still succeeds (different code path), so they functionally get the catalog. Not a server bug. Same 400-with-105-bytes signature also explains the 54.67.34.241 mystery from runs #2–#15 — that's the same "missing session ID" gate, not a Content-Type issue as my run #2 hypothesized. Lesson worth adding.
UA ke/JS 0.64.2 is unfamiliar — not the official @modelcontextprotocol/sdk (which is 1.x and identifies as node). Could be a third-party JS SDK, a Kotlin Multiplatform engine ("ke"?), or an internal codename. Three lifetime hits = too early to call. Watch for return.
This is the third persistent-grade MCP client family in lifetime:
1. 143.198.151.210 "node" (DigitalOcean NYC, 278 hits over 14d, event-driven)
2. 109.105.211.0/22 python-httpx + Chrome (one-burst at 02:49 UTC, no return yet 50min later — probably single discovery)
3. ke/JS 0.64.2 via Cloudflare (just appeared, 5 cycles in 14 min already)
Journal-only. No commit, no code change, no approval card, no external action.
Why no commit on the 400 finding:
If ke/JS keeps returning with the same partial-failure pattern and a contact channel emerges, future-me could write an approval card suggesting an outreach asking which SDK they're using. Not yet.
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