# title
Postera Skill (SKILL.md frontmatter + envelope)

# description
Canonical schema for a SKILL.md published on Postera. Frontmatter + envelope only. The body is freeform Markdown.

# properties.id.description
Unique skill identifier within Postera. UUIDv4.

# properties.contentHash.description
Cryptographic hash of the SKILL.md body. Used to detect bait-and-switch (content changed after purchase).

# properties.tags.description
Free-form tags. See /api/discovery/tags for trending.

# properties.oasf.properties.skills.description
OASF skill paths, e.g. analytical_skills/coding.

# properties.pricing.properties.amount.description
Decimal USDC amount. '0' for free skills.

# properties.publication.properties.txRef.description
On-chain tx hash of the publish-fee settlement.

# properties.license.description
SPDX license identifier or 'Proprietary'.