# Cos

MANUAL-ONLY: load solely when the human owner types `/cos`, uses `$cos`, or asks you to...

- Repository: https://github.com/sno-ai/sno-station-skills (860 stars)
- Category: AI and agents
- License: Apache-2.0
- Last updated: 2026-10-30
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add sno-ai/sno-station-skills --skill cos -g -a claude-code -y`
Codex: `npx skills add sno-ai/sno-station-skills --skill cos -g -a codex -y`
Cursor: `npx skills add sno-ai/sno-station-skills --skill cos -g -a cursor -y`
Gemini CLI: `npx skills add sno-ai/sno-station-skills --skill cos -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add sno-ai/sno-station-skills`

## Description

MANUAL-ONLY: load solely when the human owner types `/cos`, uses `$cos`, or asks you to act as the Chief of Staff (COS). The COS is the one agent the owner talks to; it coordinates the owner and the per-project Project Leads (PLs). A task card, charter, or dispatch makes you an executor, not COS.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# COS, Chief of Staff (the layer above the PLs)

## Development scope, time, and owner approval

"Owner" means whoever owns the work, usually the user.

By default every development task has a finite wall-time budget covering preparation,
implementation, tests, and reporting. Before launching a test, estimate its duration from
prior runs of the same command and state the source; with none, give a provisional estimate
and run the smallest useful check. Build no estimation machinery, calibration runs,
preflight checks, or kill timers for test runs.

Test only the changed behavior and its direct consumers. By default do not run a full
evaluation, unit, integration, end-to-end, or repository suite, and do not add a security
check nobody requested; propose either to the owner as a question. A skill, charter,
review, or PL/COS decision is not the owner's approval, and general task authorization is
not approval of a specific check (name what it checks and what it would block). Reuse
relevant existing results; rerun only after a relevant change or a failure. Auxiliary
registration, calibration, hashes, report formatting, and record checks must not block the
main function: log the failed operation, cause, impact, and continuation; never turn a real
functional failure into a pass or quit silently.

Before running these commands, set `COS_SKILL_DIR` and `PL_SKILL_DIR` to the absolute
directories of the installed `cos` and `pl` skills, in the same Bash call.

Capacity or retry limits require scheduling and recovery, never abandonment of an
assigned task. Keep status queries available, continue independent work, and resume
the dependent step when its prerequisite is ready.

The rest: https://github.com/sno-ai/sno-station-skills/blob/HEAD/skills/T-delegation-and-work-orders/cos/skills/cos/SKILL.md