fix(creative-strategy-foundations): align skills with Builder production

[vamsi (thedumsieffect)]

Summary

Follow-up to #185 that removes the broken middle state between the packaged creative-strategy skills and the currently deployed Agent Builder volume.

• Restores analyzing and briefing byte-for-byte to the Agent Builder production latest release at e9a1bd809.
• Points visual guidance back to the production reference at /runneth/references/html-generation--design-system.md.
• Restores production's html-generation handoff wording in briefing.
• Bumps the package and index version to 2 with index revision 2026-08-04-01, allowing existing staging installs to auto-update.

Why

#185 synchronized the package with Agent Builder staging after review. Builder staging already contained #2642, which split the combined HTML design-system reference into /runneth/references/design-system.md and /runneth/references/components/creative-card.md. Those files have not reached Builder production, so the package could direct an agent to deterministic missing paths.

Removing the package from the index is not a complete rollback: package sync stops selecting an absent package but does not uninstall already-staged resources, and this package's protected uninstall policy rejects ordinary uninstall. Updating the managed package is the smallest complete correction.

Validation

• Packaged analyzing, briefing, and creative-generation Git blob hashes exactly match Agent Builder production latest at e9a1bd809.
• node --test scripts/validate-runneth-package-index.mjs — 11/11 passing.
• git diff --check passes.
• The package manifest and index versions match at 2.

Rollout

This is a managed-sync package update. Apply the runneth-fleet-change-approved label only after core engineering review.

[greptile-apps]

Confidence Score: 5/5

Safe to merge — all changes restore content that already runs in Agent Builder production, and version numbers are consistent across both the package manifest and the index.

The diff is a targeted revert of four reference-path strings and one handoff paragraph back to the production-verified baseline, paired with a version bump. Both changed SKILL.md files update every occurrence of the affected paths together, and no logic, schema, or runtime behavior is introduced.

Files Needing Attention: No files require special attention.

_{Reviews (3): Last reviewed commit: "Merge branch 'staging' into codex/creati..." | Re-trigger Greptile}