Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/michaeljauk/brain-starternpx agentmods add skills/michaeljauk/brain-starter/sync-brain-starterWrote 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/michaeljauk/brain-starter/sync-brain-starter)<a href="https://agentmods.dev/skills/michaeljauk/brain-starter/sync-brain-starter"><img src="https://agentmods.dev/badge/skills/michaeljauk/brain-starter/sync-brain-starter/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/michaeljauk/brain-starter/sync-brain-starter"><img src="https://agentmods.dev/badge/skills/michaeljauk/brain-starter/sync-brain-starter.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 | $0.00047 | $0.01124 |
| Opus 5.5 | $0.00019 | $0.00450 |
| Sonnet 5.5 | $0.00009 | $0.00225 |
| Haiku 4.5 | $0.00005 | $0.00112 |
Grade A, and why
sync-brain-starter 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 1mo 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 — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sync Brain Starter
Syncs reusable parts from the private brain repo (~/brain) to the public template repo (~/tech/brain-starter). Copies skills, configs, and templates — then shows a diff for review before committing.
Trigger phrases
/sync-brain-starter- "sync brain starter"
- "push changes to the template"
- "update brain-starter"
Step-by-step workflow
1. Run the sync script
bash ~/brain/scripts/sync-brain-starter.sh
This copies:
- Vault skills (curated list):
wrap-session-up,ingest-article,defuddle,obsidian-cli,obsidian-markdown,obsidian-bases,json-canvas,gws-obsidian-prep,project-sync,research-spike,save-answer,lint-brain,qmd,find-skills,sync-brain-starter - Configs:
commitlint.config.js,.husky/commit-msg,docs/templates.md,docs/integrations.md
It does NOT copy:
CLAUDE.md,README.md,package.json,.claude/memory/MEMORY.md-- these are generalized differently in the template- Global/plugin skills -- brain-starter no longer bundles plugin skills (gstack, gws, todoist, m365, etc.). Users install these globally via their own install commands.
2. Review the diff
cd ~/tech/brain-starter && git diff
Run the leak gate. Do not eyeball the diff.
bash docs/scripts/leak-gate.sh --worktree
Reading a diff is not a check. Edit the TERMS list in that script first — it should name every
client, employer, colleague, product and account that must never reach the public copy, plus the
token shapes for secrets. Keep the script in the private repo; the list is itself sensitive.
A hit is a blocker. Replace it with a placeholder (acme, jane-doe, your-org.atlassian.net,
ACME-123, ~/), then run the gate again. Do not report the sync as clean until the command
prints nothing.
To judge whether the public repo was ever exposed, scan the history, not the tree.
git grep <rev> searches that revision's tree and says nothing about older commits:
bash docs/scripts/leak-gate.sh --history.
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.
- 1mo ago First seen · 109 lines · 47 tokens per session scan A b52510acf072
sync-brain-starter is a skill published in the GitHub repository michaeljauk/brain-starter (5 stars, last pushed 1mo ago), licensed MIT. It adds 47 tokens to every session and 1,124 once invoked, about $0.0002 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 2026-08-31.
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