chore(lint): enforce declaration-guard spacing and set Prettier to 100 columns

[aliasunder]

Adds a lint rule that keeps each declaration visually separate from the if that consumes it, and sets Prettier to 100 columns.

Changes

• @stylistic/padding-line-between-statements (prev: [const, let], next: if) as an error. --fix added the blank line at 116 sites. Prettier does not manage blank lines, so the two tools cannot conflict.

• printWidth: 100 in .prettierrc.json, replacing Prettier's implicit 80-column default. Long descriptive names stop wrapping, and lines still fit a side-by-side diff. The whole repo is reformatted.

• @stylistic/eslint-plugin 5.10.0 added as a dev dependency. ESLint 10 no longer ships the core padding-line-between-statements rule.

• AGENTS.md → Code style gains the blank-line convention the new rule enforces part of.

• orchestrate.ts readability cleanup: three comments rewritten as plain sentences, the anchor-stripping regex named and documented, and the rename check's fromPath !== undefined replaced with a truthy guard.

No behavior changes. The diff is formatting, the new config, and the cleanup above.

Verification

• npm test: 732 passed
• npm run lint: clean
• npm run build: clean
• npx prettier --check .: clean

Merge order

Other open branches that touch src/ will conflict mechanically with the reformat. Rebase each onto this change and rerun npm run lint:fix and npm run prettier to resolve.

🤖 Generated with Claude Code

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​stylistic/​eslint-plugin@​5.10.0

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[umm-actually]

umm-actually re-reviewed at 6eb48e9

No new findings (1 tracked finding(s) across all runs).

Context notes

• 1 changed file(s) excluded from review: package-lock.json (built-in default list)

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umm-actually · deepseek/deepseek-v4-flash-0731