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/the-sid-dani/second-brain-os/use-designnpx skills add the-sid-dani/second-brain-os --skill use-designgit clone --depth 1 https://github.com/the-sid-dani/second-brain-osWrote 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/the-sid-dani/second-brain-os/use-design)<a href="https://agentmods.dev/skills/the-sid-dani/second-brain-os/use-design"><img src="https://agentmods.dev/badge/skills/the-sid-dani/second-brain-os/use-design.svg" alt="Measured on agentmods" 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 | $0.00098 | $0.00555 |
| Opus 5 | $0.00049 | $0.00278 |
| Sonnet 5 | $0.00020 | $0.00111 |
| Haiku 4.5 | $0.00010 | $0.00056 |
Grade A, and why
use-design 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 5d 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.
What it actually says
use-design — swap the active design system
The design-* skills read ./DESIGN.md at the workspace root for their tokens (palette, typography, layout rules). This skill swaps that file for a different brand from the design-system catalog.
Resolve <workspace.root> and <workspace.resources> from the Configuration section in root CLAUDE.md before using any path below.
Steps
-
Resolve the brand argument. The invocation is
/use-design <brand>(e.g./use-design stripe). If no brand is given, or the brand doesn't match a folder, list what's available and stop:ls <workspace.root>/<workspace.resources>/design-systems/Match case-insensitively and accept close variants (
linear→linear-app). If the match is ambiguous, show the candidates and ask. -
Verify the source exists at
<workspace.root>/<workspace.resources>/design-systems/<brand>/DESIGN.md. If the folder exists but has noDESIGN.md, say so — don't invent tokens. -
Preserve the current root
DESIGN.mdif it has been customized: before overwriting, check whether rootDESIGN.mddiffers from every catalog brand. If it matches a catalog brand, it's safe to overwrite (the catalog still has it). If it matches nothing, it's custom — copy it to<workspace.root>/<workspace.resources>/design-systems/custom-<YYYY-MM-DD>/DESIGN.mdfirst and tell the user. -
Copy the brand file to the workspace root:
cp <workspace.root>/<workspace.resources>/design-systems/<brand>/DESIGN.md ./DESIGN.md -
Confirm in one line: which brand is now active, and remind that all design-* skills pick it up on their next invocation.
Boundaries
- Never edit the catalog files under
design-systems/— they're the library; only rootDESIGN.mdchanges. - This skill swaps tokens only. It does not restyle existing artifacts — re-run the relevant design-* skill to regenerate them under the new brand.
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.
- 5d ago First seen · 38 lines · 98 tokens per session scan A ea671fa8d57b
use-design is a skill published in the GitHub repository the-sid-dani/second-brain-os (2 stars, last pushed 29d ago), licensed MIT. It adds 98 tokens to every session and 555 once invoked, about $0.0005 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 2026-08-31.
Other skills, from other repositories
dr-fanout
One command to fan a Deep Research prompt out to several external LLMs at once (ChatGPT / Gemini / Grok / others) through the operator's logged-in browser, then collect the reports, archive the originals, and synthesize a consensus. Trigger on "/dr-fanout", "fan out the DR", "distribute the research prompt". Automates…
journey
Resurrect and continue a build-in-public BOOK — the serialized story of a founder + AI- cofounder journey. One command: pick up state (which days are written in which languages, what's uncommitted, where the gaps are), then continue writing via the established pipeline. Trigger on "/journey", "the book", "continue the…
fb-reply
Read who commented on the owner's recent Facebook posts and post PERSONALIZED replies through their real logged-in Chrome (live-tab, low-ban-risk), draft-first and rate-limit-guarded. Trigger on "/fb-reply", "reply to my facebook comments". Replying on your OWN posts is expected behavior; the guard enforces a daily…
follower-onboard
Onboard a NEW family/team machine as a FOLLOWER-CONSUMER joining the multi-machine Claude+vault network. A follower READS the shared vault + canon + skills + memory as RECEIVE- ONLY data, runs nothing heavy locally (no RAG/reindex/GPU), and the hub never pushes executable hooks to it. Trigger on "/follower-onboard "…
3
Launch autonomous multi-machine consensus between Claude peers (hub + laptops + teammate machines): the peers negotiate a decision among themselves over a shared coordination channel and execute it, without using the human as a courier. Trigger on "/03" or phrases like "work it out among yourselves" / "find…
alfa-search-recall-deepresearch
Mandatory decision protocol ("Alpha Protocol") for any new STRATEGIC work — never jump to implementation on local recall alone. Run RECALL over the knowledge vault → GAP analysis → emit a DEEP RESEARCH PROMPT to run in external deep-research tools → SYNTHESIS + Decision Memo when results come back. Trigger on…