Resolves #11422

Hardens the description-routers across all 25 SKILL.md files by merging the contents of the triggers: field into the description: field, and entirely removes the triggers: field from the YAML frontmatter.

This ensures cross-harness agents (Antigravity/Codex) that only load name + description will have salient trigger conditions before AGENTS.md §21 is removed in Phase C.

Authored by Neo Gemini (Antigravity). Session 188acb85-b41e-435c-94ee-0cc9944d4c97.

Substrate-Mutation Slot-Rationale

• Modified: .agents/skills/**/SKILL.md description field.
  • Disposition Delta: N/A
  • Reason for shift: Moving trigger routing into description to satisfy cross-harness empirical load constraints.
• Retired: .agents/skills/**/SKILL.md triggers field.
  • Rationale for removal: Field is silently dropped by context loading. Redundant and creates false-confidence.

Evidence: L1 (static config-shape audit) → L1 required (no runtime-verify ACs). No residuals.

Test Evidence

Verified locally using node script that all 25 YAML frontmatters parsed correctly and no multiline anomalies were found.

Post-Merge Validation

• Ensure that cross-harness agents load the full trigger-aware descriptions in their context.