slot

slot is a skill for Claude Code from tonydzi/second-brain-starter-kit. It costs 50 tokens per session (5,433 once invoked), scanned A, original, MIT.

A registry for reusable background Claude coding sessions, called slots. It can reuse an existing session or create a new one when a separate task needs to run.

In plain words
What is it for?
It is for listing reusable sessions, starting background work, returning a session to the registry, and checking how many slots remain.
Why use it?
Reusing a session preserves task-level approval history and can avoid stopping for the same approval again. It also gives a way to see which sessions are available.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: reads .claude/ paths.

Part of the second-brain-skills plugin — 248 skills, 1 plugin shipped together

Good fit It is for listing reusable sessions, starting background work, returning a session to the registry, and checking how many slots remain.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tonydzi/second-brain-starter-kit/slot
Install

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.

Any agent
npx skills add tonydzi/second-brain-starter-kit --skill slot
Clone the repo
git clone --depth 1 https://github.com/tonydzi/second-brain-starter-kit

Made for: Claude Code.

Or install second-brain-skills, the plugin that ships this one along with the rest of its 248 skills, 1 plugin.

Wrote 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.

agentmods badge for slot

README.md
[![agentmods](https://agentmods.dev/badge/skills/tonydzi/second-brain-starter-kit/slot/github.svg)](https://agentmods.dev/skills/tonydzi/second-brain-starter-kit/slot)
Your own site
<a href="https://agentmods.dev/skills/tonydzi/second-brain-starter-kit/slot"><img src="https://agentmods.dev/badge/skills/tonydzi/second-brain-starter-kit/slot/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.

agentmods 80×15 button for slot

Your own site · 80×15
<a href="https://agentmods.dev/skills/tonydzi/second-brain-starter-kit/slot"><img src="https://agentmods.dev/badge/skills/tonydzi/second-brain-starter-kit/slot.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,433 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00050 $0.05433
Opus 5.5 $0.00020 $0.02173
Sonnet 5.5 $0.00010 $0.01087
Haiku 4.5 $0.00005 $0.00543

Measured 7d ago against content hash 65fd7ada7520, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

slot 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 7d 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.

skills/slot/SKILL.md · 282 lines

How it starts

The opening of the file, as written. The whole thing — 282 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/slot — реестр переиспользуемых сессий

⭐⭐⭐ ГЛАВНОЕ СВЕРХУ (24.08.2026): ПЕРЕИСПОЛЬЗОВАНИЕ — ПЕРВЫЙ выбор, create — второй

Приказ Антона 24.08 голосом: «нужно переиспользовать сессии, чтобы они как можно реже запрашивали аппрувы». Порядок 31.07 («сначала create») отменён, потому что премиса, на которой он стоял, опровергнута замером в тот же вечер.

Что замерено 24.08 18:42 на хабе (живой прогон, не рассуждение):

  1. update_scheduled_task(слот, description + prompt + fireAt) прошёл молча.
  2. Сессия поднялась мгновенно (у разовой задачи задержки диспетчера нет).
  3. Сессия переименовала себя сама первым ходом через mcp__ccd_session_mgmt__set_session_title и в list_sessions видна как «ПРОБА переиспользования слота 1842» (titleSource=tool), а НЕ под чужим taskId. Старое утверждение «список title сессии не читает» — мертво.
  4. Приложение само называет цену холодного create (текст ответа инструмента): «Tool approvals granted during a run are stored on the task and auto-applied to future runs» — апрувы живут НА ЗАДАЧЕ. Новая задача = пустая история апрувов = сессия встанет на первом коннекторе, и окно будет ждать Антона. Прогретая — не встанет.

Процедура (единственная):

python ~/.claude/scripts/session_slot.py --claim "<суть сессии>"     # даст taskId слота
update_scheduled_task(
  taskId="<слот>",
  description="<человеческое имя, видно в разделе Scheduled>",
  fireAt="<ТОЛЬКО из двери: `python ~/.claude/scripts/_shared/fireat_now.py --in 15`>", notifyOnCompletion=true,
  prompt="ПЕРВЫМ ДЕЛОМ переименуй эту сессию: вызови mcp__ccd_session_mgmt__set_session_title
          с title \"<суть>\". Затем: <сид>")

⛔ Строка про set_session_title обязательна — без неё сессия висит под чужим именем, и это ровно та невидимость, из-за которой канон переворачивали в июле.

create_scheduled_task остаётся честным путём только когда пул пуст — гейт spawn_slot_guard.py теперь сам отбивает create при непустом пуле и печатает готовый вызов update. Пул не посчитался — гейт пускает create, но кричит в stderr (fail-open обязан быть громким, урок 29.07).

Read the full file on GitHub · 282 lines

Changes

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.

  1. 7d ago Changed · +36 lines · -97 tokens per session 65fd7ada7520
  2. 11d ago Changed · -1 lines 136276d30e7c
  3. 14d ago Changed 4e5d44411bfb
  4. 16d ago First seen · 247 lines · 147 tokens per session scan A 7b88661d5db4

Subscribe to this mod's changes

slot is a skill published in the GitHub repository tonydzi/second-brain-starter-kit (9 stars, last pushed today), licensed MIT. It adds 50 tokens to every session and 5,433 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 2026-10-04.

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