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docs: corpus run 2 in agent mode — prompt A/B, recall still 0% by rule - #13

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Oct 23, 2026
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aisona-lab merged 1 commit into
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A second corpus run, identical to run 1 (#12) except for one change: the subagent prompt no longer says "only fail when the code shows the problem; not on speculation". This is a docs-only change, adding docs/eval-runs/2026-10-23-agent-mode-corpus-run2.txt and a paragraph in docs/hardening-plan.md.

run 1 run 2
quiet rate 100% 86%
noise per clean hunk 0.00 0.14
recall (by rule) 0/15 0/15
gate ready no no

Read by hand (not a metric, not gated on)

The reviewer described 2 of the 8 labelled fix PRs correctly, but filed both under rules other than the label:

  • httpx-3442 (R2/R13/R16 instead of R7): the verify=False branch returns early, so cert is never loaded.
  • requests-7308 (R7/R13 instead of R4): $ also matches before a trailing newline.

There are two open readings:

  • Rule-identity scoring undercounts a reviewer whose rules overlap.
  • Hunk-only context leaves most defects invisible. R13 abstains 41% of the time and R14 78%, which is the Stage 3a case for file-level context.

Any defect-level metric has to be pre-registered before the next run, not fitted to this one.

The artifact also flags one possible real defect in a "clean" hunk (click-3876-3), not verified.


Generated by Claude Code

Removing the conservative sentence from the subagent prompt moved quiet
rate 100% -> 86% and noise 0.00 -> 0.14 per clean hunk; recall by rule
stays 0/15 and the gate stays closed. Read by hand, 2 of 8 labelled
defects were described correctly under other rules. Published as an
observation, not a metric: any defect-level score is pre-registered first.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WkPsqEJ4QYWRW5eCFBYRPS
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aisona-lab marked this pull request as ready for review October 23, 2026 08:12
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aisona-lab merged commit a78c347 into main Oct 23, 2026
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2 participants