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feat: reproducible promptfoo benchmark + 3-model results

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Commit a promptfoo harness (config + arm prompts + LOC metric + vendored
caveman SKILL) so anyone can re-run the comparison: no-skill vs caveman vs
ponytail, across Haiku / Sonnet / Opus, 10 runs per cell, median reported.

Replace the old unreproducible 6-task chart with assets/benchmark-3model.svg
from this run, and reframe the README to the reproducible numbers: ponytail
writes 80-94% less code, costs 47-77% less, and runs 3-6x faster than a
no-skill agent on every model. benchmarks/README.md carries the median tables
and the reproduce command. Drops nothing that is not measured.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Emeriko
2026-06-13 05:08:55 +02:00
co-authored by Claude Opus 4.8
parent 93f3ac1d76
commit 321a59c82f
12 changed files with 221 additions and 74 deletions
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<svg viewBox="0 0 860 336" xmlns="http://www.w3.org/2000/svg" font-family="-apple-system, 'Segoe UI', Helvetica, Arial, sans-serif">
<title>Median lines of code per arm across three models</title>
<text x="20" y="26" font-size="15" font-weight="600" fill="#8b949e">Median lines of code. 10 runs per cell. Lower is leaner.</text>
<text x="20" y="45" font-size="12" fill="#8b949e" opacity="0.85">Ponytail writes 80-94% less code, costs 47-77% less, and runs 3-6x faster than a no-skill agent.</text>
<rect x="20" y="58" width="12" height="12" rx="2" fill="#8b949e"/><text x="38" y="69" font-size="13" fill="#8b949e">baseline (no skill)</text>
<rect x="190" y="58" width="12" height="12" rx="2" fill="#d9822b"/><text x="208" y="69" font-size="13" fill="#8b949e">caveman</text>
<rect x="300" y="58" width="12" height="12" rx="2" fill="#2da44e"/><text x="318" y="69" font-size="13" fill="#8b949e">ponytail</text>
<text x="112" y="119" font-size="13" font-weight="600" fill="#8b949e" text-anchor="end">Haiku</text>
<rect x="120" y="92" width="508" height="14" rx="2" fill="#8b949e"/><text x="634" y="103" font-size="11" fill="#8b949e">518</text>
<rect x="120" y="110" width="114" height="14" rx="2" fill="#d9822b"/><text x="240" y="121" font-size="11" fill="#d9822b">116</text>
<rect x="120" y="128" width="38" height="14" rx="2" fill="#2da44e"/><text x="164" y="139" font-size="11" fill="#2da44e" font-weight="600">39</text>
<text x="112" y="193" font-size="13" font-weight="600" fill="#8b949e" text-anchor="end">Sonnet</text>
<rect x="120" y="166" width="680" height="14" rx="2" fill="#8b949e"/><text x="806" y="177" font-size="11" fill="#8b949e">693</text>
<rect x="120" y="184" width="118" height="14" rx="2" fill="#d9822b"/><text x="244" y="195" font-size="11" fill="#d9822b">120</text>
<rect x="120" y="202" width="43" height="14" rx="2" fill="#2da44e"/><text x="169" y="213" font-size="11" fill="#2da44e" font-weight="600">44</text>
<text x="112" y="267" font-size="13" font-weight="600" fill="#8b949e" text-anchor="end">Opus</text>
<rect x="120" y="240" width="251" height="14" rx="2" fill="#8b949e"/><text x="377" y="251" font-size="11" fill="#8b949e">256</text>
<rect x="120" y="258" width="66" height="14" rx="2" fill="#d9822b"/><text x="192" y="269" font-size="11" fill="#d9822b">67</text>
<rect x="120" y="276" width="50" height="14" rx="2" fill="#2da44e"/><text x="176" y="287" font-size="11" fill="#2da44e" font-weight="600">51</text>
<text x="120" y="324" font-size="11" fill="#8b949e" opacity="0.8">Median of 10 runs/cell, default temperature. 5 tasks (email, debounce, CSV sum, countdown, rate-limit), same model per group. Reproduce: npx promptfoo eval -c benchmarks/promptfooconfig.yaml</text>
</svg>
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