[wangjohn]

What and why

WP-1b of plans/retry-wp1-wp10.md. It replaces the deferred z-cap (WP-1). Converting the writer's straight quotes to curly ones moved all seven sample essays from "close" to "somewhat different" or "clearly different". The cause was one metric, curly_apostrophe_pct. There is no cap and no calibration change.

• Removed curly_apostrophe_pct and the now-unused Count.APOSTROPHES.
• The apostrophes size count now includes ‘, as it already included ' and ’.
• Character trigrams fold curly quotes, en and em dashes and the ellipsis glyph.
• Added the invariance suite: bench/invariance.py (prints the table) and tests/test_invariance.py, run with and without spaCy.
• Added "What styleprofile ignores" to docs/method.md and a CHANGELOG entry under a new [Unreleased] section.
• Report version is now 9.0. The measurement changed, so the major goes up.

Evidence

Reproduce (score -q /tmp/smart, the seven essays with curly quotes):

	main	this branch
Verdicts	all somewhat different	all close
Delta	1.09–1.35	0.46–0.70

The LLM-likeness verdict is "like the reference" in both.

Invariance suite. Failing cases per transform and side, out of 47 writer and 5 LLM cases: 7 essays plus the 40 held-out medium documents, and 5 LLM drafts.

	main, no spaCy	main, spaCy	branch, both
straight to typographic quotes, writer	47 failing (largest Delta shift 0.86)	47 failing (0.68)	0 failing (0.00 / 0.01)
every other transform	0 failing	0 failing	0 failing

The full tables are in bench/invariance.py output.

Contrast AUC after removing the metric: 1.0 before and after on examples/ and on the medium corpus, with and without spaCy. The length-only baselines are unchanged (0.729 and 0.545). The AUC is saturated at 1.0, so it can't show a drop below that. The LLM side of the suite shows the sample drafts keep their verdict bands.

Benchmark gate (--against origin/main --repeat 5): all ok, 1.01x CPU time.

Tests

• make check: 910 passed, 10 skipped.
• make demo runs. make dist-check was not run, because nothing the wheel ships changed beyond the source edits.
• Snapshots were regenerated, and the diff shows only the removed row, the shifted Delta values and the version.

Decisions

• Removed the metric rather than listing it as "not scored". It records the editor a text passed through, not the writing.
• Four existing tests changed, all forced by the removal or the version bump:
  • Two assertions about curly_apostrophe_pct in test_styleprofile.py were dropped.
  • One expected Delta went from 0.85 to 0.87 in test_cli_onboarding.py.
  • One expected version went from 8 to 9 in test_build_speed.py.
  • The three calibration tests named in the plan pass unchanged.
• Step 4: the paragraph-break transforms miss the plan's 0.25 Delta bar. For "single newline between paragraphs" and "blank lines removed", 8 of the 40 synthetic documents lose up to 0.32 of Delta without spaCy, and 10 do with spaCy. All of them move closer to the writer, and none changes a verdict. The shift is the paragraph metrics being left out (WP-5), which is real information loss. I did not add a cap. For these two transforms only, the suite lets Delta fall by any amount and bounds a rise by 0.25. It also flags any verdict that moves away from the writer. The maintainer should decide whether that exception is acceptable. The same shift is on main.
• The harness scores through files, because Text objects are never HTML-converted.

Follow-ups

• If the 0.25 bar should apply to paragraph removal as well, the paragraph metrics' weight in the "sentence shape" area needs a separate look.

🤖 Generated with Claude Code

https://claude.ai/code/session_01McJCSUfNJo6GvcAup4iJmV

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