feat(resume): check bullet cadence variety, warn-only

An audit of all 18 packages in output/ (368 bullets) found one rhythm
running through every document: 45% of bullets used the same "X, Y and
Z" triple, and the SBB package reached 85% - 11 of 13 bullets, every
Swisscom and Bosch line - plus two adjacent bullets both opening
"Build and...".

This is a style finding, not a truth finding. Every bullet was accurate.
The corpus is clean on the axes that actually signal generated text: no
AI vocabulary (0 hits for leverage/spearheaded/robust/passionate and 56
others across 35 documents), prose em-dashes at 0.08/bullet, and PDF
metadata carrying nothing but MiKTeX pdfTeX with empty Author/Title
(0 AI tokens and 0 generator-term leaks across 69 PDFs). What is left is
cadence: ten bullets sharing one three-beat rhythm read as machine-made
even when nothing in them is false.

Guarded deliberately so it cannot do harm. cadence_checks() emits WARN
and never ERROR, the critique deduction caps at 1 point, and both the
reference and the docstring state that no claim, scope or hedged verb
may be bent to satisfy rhythm. An anti-monotony rule with teeth would be
worse than the problem - it would pressure a future run into loosening a
scoped claim to vary a sentence.

Thresholds are calibrated on the corpus, not guessed. Position length
spreads are bimodal (1-9 words, then 15-17), so the check flags a spread
of <=4, the tight tail at ~28% of positions; the first draft used <=6
and flagged the median. Also fixed the opening-verb extractor, which
read \textbf{Owned ...} as the word "textbf" and produced six false
positives on one document. Per-package warnings now run 0-3.

Docs: resume_reference.md 7a + verification step, critical_rules.md 7a,
critique_framework.md mechanics row, CLAUDE.md corrections log.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MHtzyTKBcg6BWhD5qFegtK

resume_builder/reference/critical_rules.md

@@ -7,6 +7,9 @@
 5. Put employer, formal title and dates before any narrative framing.
 6. Use an optional 2--3 line summary, 4--6 skills lines and normally 11--14 evidence-led bullets.
 7. Mix natural bullet lengths. There is no character target and no page-fill quota.
+7a. Vary bullet cadence: keep "X, Y and Z" triples under about half the bullets, avoid two
+    adjacent bullets opening with the same verb, and vary length *within* each position.
+    Style only — never bend a claim, a scope or a hedged verb to fix rhythm (see §7a).
 8. Do not list unverified skills, metrics, customers, scale or causal impact.
 9. Scope Swisscom migration and Data Mesh claims to Dennis's domains, components and products.
 10. Security Champion means the 2025/2026 team role only; omit by default.

resume_builder/reference/critique_framework.md

@@ -42,7 +42,7 @@ Score the candidate-role pairing before reading tailored prose.
 | Bullet evidence and impact | 20 | Are bullets specific and scoped without invention? |
 | Relevance and terminology | 15 | Does it cover the JD naturally? |
 | Skills evidence | 10 | Is every skill evidence-backed and interview-ready? |
-| Mechanics/readability | 10 | Does it compile, parse and read cleanly? |
+| Mechanics/readability | 10 | Does it compile, parse and read cleanly? Includes **cadence variety** — read the bullets in sequence and count "X, Y and Z" triples, repeated opening verbs and length clustering per position (`resume_reference.md` §7a). Deduct at most 1 pt; it is a style flaw, never a truth flaw. |
 
 Truth/provenance below 8/10 is an automatic document failure.
 

resume_builder/reference/resume_reference.md

@@ -96,6 +96,36 @@ Natural one-, two- and three-line bullets may be mixed. There are no target char
 
 Use metrics only when verified. Company size, customer names, generic industry volumes and market economics are context, not personal impact.
 
+### 7a. Cadence variety (anti-monotony)
+
+Individually honest bullets can still read as machine-written when they all share one
+rhythm. Measured across the 18 packages in `output/` (368 bullets): **45 % used the same
+"X, Y and Z" triple**, and the SBB package reached **85 % — 11 of 13 bullets, every
+Swisscom and Bosch line**. Nothing in it was false; it simply had one cadence.
+
+This is a *style* problem, never a truth problem. Never trade accuracy, scope discipline
+or a hedged verb to fix cadence — an accurate monotonous bullet beats a varied inaccurate
+one. Fix it by reshaping sentences, not by changing what is claimed.
+
+Per document, aim for:
+
+- **At most about half the bullets carrying a three-part list.** The triple is normal resume
+  grammar and humans use it too; the tell is using little else.
+- **At least two or three bullets in a different shape** — a short declarative with a single
+  object; a bullet with one object rather than three; a bullet whose scope clause comes first.
+- **No two consecutive bullets opening with the same verb** (the SBB resume had "Build and
+  model…" directly followed by "Build and operate…").
+- **Visible length variation inside each position**, not just across the document. Five bullets
+  at 25–30 words read as generated even when the document's overall range looks fine.
+
+`validate_resume_system.py --document <file.tex>` measures all three and reports them as
+**WARN**, never ERROR — cadence can never fail a document. The length threshold is calibrated
+on the 50 multi-bullet positions in `output/`, whose spreads are bimodal (1–9 words, then
+15–17): it flags a spread of 4 words or less, the tight tail, not the median.
+
+Diagnostic only — like character counts, these are checks, never targets, and no bullet
+should be padded or trimmed to hit them.
+
 ## 8. Titles and Seniority
 
 - Preserve official titles when recognizable.
@@ -113,6 +143,8 @@ After generation:
 4. Extract text with `pdftotext` and confirm employer/title/date order.
 5. Inspect the rendered PDF: no clipping, overlap, tiny text, isolated headings or awkward page break.
 6. Check that experience begins comfortably on page 1 and certifications are not duplicated.
+7. Act on any cadence WARN from step 1 (§7a). These never fail the document; reshape the
+   offending sentences, never the claims behind them.
 
 Do not add content merely to reduce bottom whitespace.