chore(brand): em-dash sweep across prose + remove submitted CFP draft

[amcheste-ai-agent]

Summary

Brand-alignment pass against the alanchester-brand voice rules. 196 em-dashes swept across 22 prose files, plus removal of the now-submitted CFP draft.

This is the prose half of the audit. The dashboard template internal/dashboard/templates/layout.html is intentionally out of scope — it's a tool surface, not a brand surface, and its semantic UI palette stays.

What's in this PR

Em-dash sweep (22 files)

Mechanical replacement: — → . , with capitalization of the following letter when it was lowercase. Code blocks and markdown table rows protected from substitution. Per the theming-prompt's "rendered prose vs code structure" rule.

Files:

• Root: README.md, CONTRIBUTING.md, AGENTS.md, ARCHITECTURE.md, SECURITY.md
• Docs index: docs/README.md, docs/index.md, docs/helm-values.md
• Explanation: docs/explanation/{coordination,index,operations,resources}.md
• How-to: docs/how-to/index.md, install (gke/aks/eks), operate (budget-alerts/expose-dashboard/shared-storage)
• Tutorials: docs/tutorials/{getting-started,index}.md
• Reference: docs/reference/index.md

Post-sweep audit

The mandatory grep -nE '\. [a-z]' audit found 5 matches:

• 4 are abbreviation false positives (e.g., Approx., vs.) — left as-is.
• 1 real awkward continuation in docs/how-to/operate/expose-dashboard.md: the original em-dash was bridging a comma-clause (namespace — e.g. when teams...). Mechanical sweep produced namespace. E.g. when teams... which reads as two fragments. Manually fixed to namespace, e.g. when teams....

Deletion: docs/cfp/cfp-draft.md

The CFP was submitted; the draft no longer needs to live in the repo. Removing it also eliminates 30 em-dashes that the sweep would have hit and that have specific rhetorical pacing worth not mechanically disturbing. The now-empty docs/cfp/ directory is removed implicitly (git doesn't track empty directories).

What's intentionally NOT in this PR

• internal/dashboard/templates/layout.html. The dashboard's 7-phase status palette (#f3f4f6/#374151, #fef3c7/#92400e, #dbeafe/#1e40af, #d1fae5/#065f46, #fee2e2/#991b1b) is semantic UI, not brand surface. It stays unchanged.
• README badges — already aligned on develop (Version 0B0B0C, License 1F4D3A) via PR chore: align badges and description to brand #220.
• Banner — assets/banner.png already exists on develop.
• Repo topics — flagged as a separate manual gh repo edit decision.

Voice-audit residue

After the sweep, the 4 remaining . [a-z] matches are all real-English abbreviations. Listed here for the record so the next audit pass doesn't re-flag them:

File	Line	Abbreviation
docs/explanation/operations.md	13	Approx. (table header)
docs/explanation/resources.md	161	e.g. (inside Mermaid diagram)
docs/explanation/resources.md	239	e.g. (parenthetical)
docs/how-to/operate/expose-dashboard.md	107	e.g. (the fixed line, comma-restored)
docs/reference/api/index.md	140	vs.

Verification

• git diff develop --name-only → 22 modified + 1 deleted. No edits to layout.html, assets/, or .github/.
• No em-dashes in newly-rewritten prose (only in code blocks and table cells, all protected).
• All audit matches accounted for.
• PR targets develop (matches branch model).

🤖 Generated with Claude Code

No-Linear-Issue: brand-alignment doc cleanup, no associated Linear ticket