Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add peturgeorgievv-factory/postfast-mcp --skill schedule-postsgit clone --depth 1 https://github.com/peturgeorgievv-factory/postfast-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/peturgeorgievv-factory/postfast-mcp/schedule-posts)<a href="https://agentmods.dev/skills/peturgeorgievv-factory/postfast-mcp/schedule-posts"><img src="https://agentmods.dev/badge/skills/peturgeorgievv-factory/postfast-mcp/schedule-posts/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/peturgeorgievv-factory/postfast-mcp/schedule-posts"><img src="https://agentmods.dev/badge/skills/peturgeorgievv-factory/postfast-mcp/schedule-posts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00086 | $0.01950 |
| Opus 5.5 | $0.00034 | $0.00780 |
| Sonnet 5.5 | $0.00017 | $0.00390 |
| Haiku 4.5 | $0.00009 | $0.00195 |
Grade A, and why
schedule-posts scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 17d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Schedule posts with PostFast
These steps use the PostFast connector's tools. PostFast holds each post you create until the user approves it, so the user sees exactly what will go out, where and when, before anything is published.
Rules
- Create on hold, publish only on a yes. Create every post with
approvalStatus: "PENDING_APPROVAL". Show the user the preview (step 6), and callapprove_postsonly after they say yes to it in the conversation, even when their first message asked you to post right away. A yes covers the posts as previewed; if anything changes, preview again. - Only connected accounts publish. Check each account's
connectionStatusinlist_accountsbefore you schedule to it. - Fit each network. Before you write or adapt a post, read
references/platform-rules.mdin this skill's folder: text limits, required media, and the settings each network needs. - Use the user's time zone.
scheduledAtis ISO 8601 with a UTC offset. If you don't know the user's time zone, ask once, and show every time back in it.
Steps
1. Pick the workspace
Call list_workspaces. With one workspace, carry on and leave workspaceId out. With several, use the one the user names or ask which, then pass its id as workspaceId on every call that follows, including approve_posts, delete_post, delete_posts and list_posts in later turns. Leaving it out uses the workspace the user connected, where a post from another workspace isn't found: delete_post then answers deleted: false, delete_posts lists it in notFoundIds, and list_posts returns nothing.
2. Pick the accounts
Call list_accounts and match what the user asked for ("our Instagram", "LinkedIn and X") by platform, platformUsername and displayName. If a network has more than one account, ask which one.
If an account's connectionStatus is DISABLED:
- Don't schedule to it; PostFast rejects that. Tell the user, and give the
disabledReason. - Offer a reconnect link:
generate_connect_linkwithplatformsset to that network. Whoever owns the account opens the link and signs in again. SetsendEmailonly when the user asks you to email the link and gives the address. - Offer to save the post as a draft in the meantime.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 17d ago Changed c677e034cafd
- 22d ago Changed fc193b8a772b
- 25d ago Changed 4afbf6e565d2
- 1mo ago First seen · 90 lines · 86 tokens per session scan A 22f6da29f300
schedule-posts is a skill published in the GitHub repository peturgeorgievv-factory/postfast-mcp (7 stars, last pushed 2d ago), licensed MIT. It adds 86 tokens to every session and 1,950 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-27.
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