slice-work

slice-work is a skill for Claude Code, Codex from white1024/agent-nextup. It costs 54 tokens per session (1,043 once invoked), scanned A, original, MIT.

A planning method that turns agreed work into small, independently demonstrable tasks with explicit dependencies. A dependency is a task that must be completed before another can start.

In plain words
What is it for?
Use it after scope is settled, when making a plan or specification actionable, or when a task is too large for one session. It also checks existing tasks, project vocabulary and relevant specifications.
Why use it?
It prevents large, vague tasks from blocking progress and makes the next genuinely ready task visible. Vertical slices cover the path needed for one usable behaviour instead of separating work by technical layer.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it after scope is settled, when making a plan or specification actionable, or when a task is too large for one session. It also checks existing tasks, project vocabulary and relevant specifications.

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Install with agentmods
npx agentmods add skills/white1024/agent-nextup/slice-work
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 white1024/agent-nextup --skill slice-work
Clone the repo
git clone --depth 1 https://github.com/white1024/agent-nextup

Made for: Claude Code, Codex.

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 slice-work

README.md
[![agentmods](https://agentmods.dev/badge/skills/white1024/agent-nextup/slice-work/github.svg)](https://agentmods.dev/skills/white1024/agent-nextup/slice-work)
Your own site
<a href="https://agentmods.dev/skills/white1024/agent-nextup/slice-work"><img src="https://agentmods.dev/badge/skills/white1024/agent-nextup/slice-work/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 slice-work

Your own site · 80×15
<a href="https://agentmods.dev/skills/white1024/agent-nextup/slice-work"><img src="https://agentmods.dev/badge/skills/white1024/agent-nextup/slice-work.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,043 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 $0.00054 $0.01043
Opus 5.5 $0.00022 $0.00417
Sonnet 5.5 $0.00011 $0.00209
Haiku 4.5 $0.00005 $0.00104

Measured 4d ago against content hash 83ed7284b675, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

slice-work 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 4d 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.

crates/nextup-core/skills/slice-work/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

slice-work — turn agreed scope into schedulable tasks

Goal: the work exists as tasks in this workspace, each one a slice that can be finished in one session and shown working on its own, with dependsOn naming exactly what must land first — so "Next steps" and list_tasks { ready: true } always point at something that can actually start.

Start from a settled scope. If what "done" means is still open, settle it first: call the Skill tool with align-scope.

1. Read what is already there

  • The open tasks (list_tasks) and the recent decisions, so new tasks neither duplicate nor contradict them.
  • The project's vocabulary — GLOSSARY.md at the project root if there is one, otherwise the vocabulary files in memory — and use its words in every title.
  • With the spec module on (validate_task_specs is in your tool list): the current specs of the capabilities this work touches (list_specs, get_spec).

Done when you can name every existing task this work touches.

2. Draft the slices

  • Vertical, not horizontal. Each task cuts a narrow path through every layer it needs and can be shown working on its own. "A user can export one report as CSV" is a slice; "write the export backend" is a layer.
  • One session each. A slice that will not fit gets cut again.
  • Prefactor first. When the existing structure makes the change awkward, the clean-up is its own task and the feature depends on it.
  • Expand → migrate → contract for a mechanical change that reaches across the whole project (a rename, a reshaped shared type): add the new form beside the old, move callers over in batches small enough that each stays green, remove the old form last — chained with dependsOn.
  • For each task write a title naming what it delivers, a description saying what it delivers end to end and how anyone will know it works, and its blockers: only the tasks that genuinely gate it. Describe behaviour rather than files — the files shift as the work does.

Done when every agreed outcome is covered by at least one task and every blocker points at a task in the draft or already in the store.

Read the full file on GitHub · 67 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. 4d ago First seen · 67 lines · 54 tokens per session scan A 83ed7284b675

Subscribe to this mod's changes

slice-work is a skill published in the GitHub repository white1024/agent-nextup (2 stars, last pushed 5d ago), licensed MIT. It adds 54 tokens to every session and 1,043 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 2026-10-19.