Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add braininahat/brains-in-a-hat/plugin install brains-in-a-hatWrote 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/braininahat/brains-in-a-hat/assemble)<a href="https://agentmods.dev/skills/braininahat/brains-in-a-hat/assemble"><img src="https://agentmods.dev/badge/skills/braininahat/brains-in-a-hat/assemble/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/braininahat/brains-in-a-hat/assemble"><img src="https://agentmods.dev/badge/skills/braininahat/brains-in-a-hat/assemble.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 | $0.00062 | $0.01033 |
| Opus 5 | $0.00031 | $0.00517 |
| Sonnet 5 | $0.00012 | $0.00207 |
| Haiku 4.5 | $0.00006 | $0.00103 |
Grade A, and why
assemble scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Assemble
Re-engage Neal for this session. There is no team to build here — the roster is lazy: nobody is spawned until a matching intent arrives. This skill just (re-)adopts the persona and confirms the session is ready to route.
In normal use, this fires automatically — the new-roster-bootstrap UserPromptSubmit hook emits orientation on the first prompt and you'll already be Neal. This skill exists as:
- A manual escape hatch if hooks were disabled.
- An idempotent re-adoption if you want to re-load the persona mid-session (e.g., after
/compact, or after a/resumewhere the bootstrap banner didn't fire).
Process
-
Read the Neal persona from
<plugin-root>/hooks/neal-persona.md, where<plugin-root>is$CLAUDE_PLUGIN_ROOTif set, otherwise the grandparent of this skill's base directory (shown in the invocation header as "Base directory for this skill: …/skills/assemble"). Adopt it fully — you ARE Neal. -
Derive the project key and run the vault preflight:
# Substitute the actual absolute path shown in the invocation header for $SKILL_BASE. # There is no $0 in a skill Bash call, so you must read it from the header. PLUGIN_ROOT="${CLAUDE_PLUGIN_ROOT:-$SKILL_BASE/../..}" source "$PLUGIN_ROOT/hooks/lib-common.sh" REPO_KEY=$(derive_project_key) PROJECT_GROUP=$(derive_project_group) if vault_is_git_repo; then echo "vault: available at $VAULT_DIR" else echo "vault: not configured" fiREPO_KEY/PROJECT_GROUPcome from.brains_in_a_hat/project.jsonif present, else git remote, else basename.$BRAINS_VAULT_DIRdefaults to~/.hatbrainsif unset. -
No spawning here. Nobody is pre-spawned — not Dewey, not Ebert, not Marco, not Wright, not a Builder. Each spawns lazily on first matching intent per neal-persona.md's roster section, and SendMessage reuses them thereafter. This step exists only to confirm readiness, not to stand up a team.
-
Report readiness to the user in one line — no teammate listing, that's noise:
- Vault available: "Neal online for
<repoKey>." (Dewey will spawn on first memory-recording or cross-repo-recall intent.) - Vault not configured: "Neal online for
<repoKey>. No vault configured — cross-repo memory and decision/session history are off; runscripts/vault-init.sh autoto set one up. Per-repo memory still works normally."
- Vault available: "Neal online for
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.
- 11d ago First seen · 58 lines · 62 tokens per session scan A 256681fa517c
assemble is a skill published in the GitHub repository braininahat/brains-in-a-hat (4 stars, last pushed 2mo ago), licensed MIT. It adds 62 tokens to every session and 1,033 once invoked, about $0.0003 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.
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