semianalysisai/cc-traces-weka-no-subagents-051826

CC Traces — Weka, No-Subagents, v5 only (May 18 2026)

A collection of 98 multi-turn agentic traces (≈ 22.8 k individual model requests) drawn from real production traffic against the Claude Code CLI ≥ 2.1.139. Each trace captures the full request/response sequence of a single agent session, including per-request KV block hashes, so the dataset can be replayed against an inference engine or used to simulate prefix-cache behavior offline.

No-subagents, v5-only, CC ≥ 2.1.139 variant. Three filters:

1. No subagents. All WekaSubagentEntry blocks have been stripped — only top-level main-agent turns remain.
2. v5 only. Every replayable request in every included session has trace_version = 5 (latest proxy schema, o200k_base tokenizer).
3. Claude Code CLI ≥ 2.1.139. Every successful request in every included session is on a CC build that ships the x-claude-code-agent-id HTTP header — the canonical signal sub-agent grouping depends on. Sessions where any row predates this header are excluded entirely because we can't reliably distinguish a Task-tool sub-agent from a utility call without it.

Each remaining trace has ≥ 20 main-agent turns post-strip so every trace exercises multi-turn replay meaningfully.

Companion: cc-traces-weka-051826 is the same 98 traces with sub-agent fan-out preserved.

• Traces: 98
• Requests: 22,822 total, mean 232.9 per trace, max 2,171
• Models: claude-opus-4-7, claude-opus-4-6, claude-sonnet-4-6
• KV block size: 64 tokens
• Hash scope: local

Tokenizer caveat

The in field and hash_ids are measured in the proxy's tokenizer (o200k_base, GPT-4o family). Anthropic typically reports ~60 % of the o200k token count for the same content — so ISL numbers below are larger than what Anthropic would bill for the same prompt, but self-consistent between in and hash_ids for cache-hit simulation.

Summary statistics

	p50	p75	p90	p95	p99	mean
ISL (tokens)	181,474	338,879	525,701	664,749	838,501	240,502
OSL (tokens)	212	569	1,455	2,499	6,528	623
think_time (s)	0.98	2.71	12.45	71.64	448.24	92.32
Turn depth (requests/trace)	110	300	568	730	1,119	233

Model composition

model	requests
claude-opus-4-7	22,484
claude-opus-4-6	302
claude-sonnet-4-6	36

Source

Derived from the SemiAnalysis Claude Code traffic proxy. Build pipeline:

1. utils/sample_proxy_traces.py --min-trace-version 5 --min-main-turns 20 --require-cli-min 2.1.139 --privacy-mode anon
2. utils/proxy_to_weka.py converts per-session JSONL into weka-format trace JSON. Sub-agent grouping is identical to the proxy dashboard's buildRequestRuns.
3. Post-step strips all WekaSubagentEntry blocks; traces with <20 surviving main turns are dropped (none dropped at this build).
4. Remaining traces concatenated into traces.jsonl (one trace per line).