A skill that drafts first
Most social media skills give an agent every tool and hope for the best. This builder starts from the other end: by default the agent may only save drafts, and a person schedules them in PostBoost. You can let it schedule after your approval or add posts to the queue on its own, and the file says exactly which tools it may call at each level.
What goes into the file
- Setup: how to connect the agent to PostBoost, through the connector (OAuth) or the advanced server (API key).
- Guardrails: your autonomy level, a daily cap, validation before every write, no permanent deletes, no repeat posts unless you ask, and an idempotency key so a retry never creates a second post.
- Workflows: one numbered list per task, naming the PostBoost MCP tools in the order the agent should call them.
- Network rules: the caption limit and notes for each network you pick.
- Your rules and example prompts: your own do's and don'ts, and two prompts per task to try first.
Facts
- Agent Skills
namefields are 1 to 64 lowercase letters, digits and hyphens, with no hyphen at the start, at the end or twice in a row, and match the skill's folder;descriptionis at most 1,024 characters; the specification recommends keeping SKILL.md under 500 lines (agentskills.io, checked 2026-10-21). - AGENTS.md is plain Markdown with no required fields (agents.md, checked 2026-10-21).
- The builder takes up to 10 rules of 200 characters each. Its largest file stays under 500 lines.