fix: @W-21915952@ Update SKILL.md to allow user to make changes in the generated flow

[sf-pragya-kumari]

@W-21915952@

• Scoped strict “do not edit” rules to pipeline-returned XML only.
• Added a clear exception: when user asks to fix deployment/validation errors, targeted XML edits are allowed.
• Added the same exception in best practices + checklist for consistency.
• Fixed typo: returned.ss → returned.

References: Contributing guide · Skill authoring guide · Agent Skills spec

What changed

Why

Notes

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Skills

Manual checklist

Description quality

• Describes what the skill does and the expected output
• Includes relevant Salesforce domain keywords (Apex, LWC, SOQL, metadata types, etc.)
• Trigger phrases are specific enough for Vibes to select this skill reliably

Instructions

• Clear goal statement
• Step-by-step workflow
• Validation rules for generated output
• Defined output / artifact

Context efficiency

• Core instructions are concise — supporting material lives in templates/, examples/, or docs/ subdirectories
• No unnecessary background explanation in the body

Automated checks

Enforced by CI (npm run validate:skills) per the Agent Skills spec:

• Directory is one level deep, named in kebab-case (max 64 chars), contains SKILL.md
• Frontmatter name matches directory name; description is present, ≥ 20 words, ≤ 1024 characters, and includes trigger language
• Body is non-empty and under 500 lines
• Name uses gerund form ⚠ (warning — does not block merge)