Eight of the nine files here are OrcaReplay captures — the prompt Claude Code actually put on the wire from a terminal on our own machine, with the tool schema that travelled with it.
| model | mode | chars | tools | files |
|---|---|---|---|---|
claude-opus-5 |
interactive | 22,950 | 35 | prompt · tools |
claude-fable-5-1 |
interactive | 26,131 | 35 | prompt · tools |
claude-fable-5-1 |
-p / Agent SDK |
20,806 | 29 | prompt · tools |
claude-opus-4-8 |
interactive | 18,672 | 33 | prompt · tools |
Rows two and three are the same model on the same day, 5,325 characters and six tools apart: the
identity line itself changes from You are Claude Code, Anthropic's official CLI for Claude to
You are a Claude agent, built on Anthropic's Claude Agent SDK. The harness version rides in the
first line of every file (cc_version=…).
Reproduce any row with node capture/capture.mjs claude --model <id>; sizes, modes and the full
command for each are in docs/CAPTURES.md.
claude-code-system-prompt-2025-03-04.md is not a capture — it is inherited from CL4R1T4S, like
everything in docs/UPSTREAM.md.