Babysitter is a workflow engine for AI coding agents that enforces predefined steps, quality checks, human approvals, and decision records. It is used to coordinate complex, repeatable agent workflows across supported coding tools. The catalogue contains skills, agents, instructions, settings, a plugin, and an MCP integration for its workflow.
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 skills add a5c-ai/babysitter --skill work-unit-decompositiongit clone --depth 1 https://github.com/a5c-ai/babysitterWrote 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/a5c-ai/babysitter/work-unit-decomposition)<a href="https://agentmods.dev/skills/a5c-ai/babysitter/work-unit-decomposition"><img src="https://agentmods.dev/badge/skills/a5c-ai/babysitter/work-unit-decomposition.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00032 | $0.00352 |
| Opus 5 | $0.00016 | $0.00176 |
| Sonnet 5 | $0.00006 | $0.00070 |
| Haiku 4.5 | $0.00003 | $0.00035 |
Grade A, and why
work-unit-decomposition 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
- When decomposing a large feature into implementable chunks
- When preparing for orchestrated execution
Work Unit Structure
Each work unit specifies:
- ID - Unique identifier
- Title - Human-readable description
- Definition of Done - Enumerated checklist items
- File Scope - Which files the unit may modify
- Dependencies - Other work units this depends on
- Human Checkpoint - Whether human approval is needed before execution
- Parallel Safe - Whether it can execute alongside other units
Human Checkpoint Triggers
Mark human checkpoints for:
- Schema or database changes
- Security-sensitive code paths
- New architectural patterns not seen in codebase
- External API integrations
- Breaking changes to public interfaces
Agents Used
agents/architect/- Creates the decompositionagents/cto/- Validates TDD readiness per unit
Tool Use
Invoke as part of: methodologies/metaswarm/metaswarm-orchestrator (Phase 4)
What ships with it
1 file 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.
- 5d ago First seen · 44 lines · 32 tokens per session scan A cb86766ca10c
work-unit-decomposition is a skill published in the GitHub repository a5c-ai/babysitter (1,778 stars, last pushed 2d ago), licensed MIT. It adds 32 tokens to every session and 352 once invoked, about $0.0002 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 2026-09-03.
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Defines tracker status transitions and closing rules. Load when a pipeline run is linked to a ticket.
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Bounded watch-loop mechanics for the pr-watch skills: cycle timing, soft cap, handoff. Load when running or authoring a PR watch loop.
team-question
Decomposes a feature into task and question artifacts. Trigger on "shape this idea", "decompose this task", or "/team-question".