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 agentmods add skills/posthog/ai-plugin/building-workflowsnpx skills add PostHog/ai-plugin --skill building-workflowsgit clone --depth 1 https://github.com/PostHog/ai-pluginWhat 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 | $0.00085 | $0.02958 |
| Opus 5 | $0.00043 | $0.01479 |
| Sonnet 5 | $0.00017 | $0.00592 |
| Haiku 4.5 | $0.00009 | $0.00296 |
Grade A, and why
building-workflows 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 2d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
2 files 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.
- 2d ago First seen · 136 lines · 85 tokens per session scan A a76742eebf36
building-workflows is a skill published in the GitHub repository PostHog/ai-plugin (79 stars, last pushed 2d ago), with no licence file. It adds 85 tokens to every session and 2,958 once invoked, about $0.0004 per session on Opus 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 2026-08-30.
Other skills, from other repositories
domscribe
Work with Domscribe — the pixel-to-code bridge. Use when setting up, initializing, or configuring Domscribe for a project, OR when editing or modifying UI components (React, Vue, Next.js, Nuxt), implementing features from captured UI annotations, querying runtime context for source locations, exploring component…
nowledge-mem-docker
Install, check on, or upgrade a self-hosted Nowledge Mem server (the headless Docker deployment) using the nmemctl lifecycle controller. Use this whenever the user mentions running their own Nowledge Mem instance, self-hosting Mem on a NAS, VPS, homelab, or server, deploying nowledgelabs/mem from Docker Hub…
nowledge-mem-openclaw-plugin
Use this guide when an AI agent is helping a user install, configure, verify, or explain the Nowledge Mem OpenClaw plugin.
read-working-memory
Read your daily Working Memory briefing to understand current context. Contains active focus areas, priorities, unresolved flags, and recent knowledge changes. Load this automatically at the beginning of sessions for cross-tool continuity.
save-thread
Deprecated compatibility skill. In portable Agent Plugins environments this must degrade honestly to a resumable handoff, because real transcript-backed thread import is not guaranteed. Prefer save-handoff here, and use native connectors when you need actual session capture.
nowledge-mem-guide
Cross-AI personal knowledge graph memory (Nowledge Mem). Stores memories from this tool, Claude Code, Cursor, browser capture, imported documents, and more. Use when: (1) the user asks about prior work, decisions, preferences, people, dates, plans, or todos, (2) the user references something discussed before or says…