What is aps-planning?

A planning method that stores structured work plans as Markdown files. The files record modules, tasks, dependencies, and actions so plans remain available across sessions.

Use it to plan multi-step coding work, create or update work specifications, and track actions in a project’s plans directory.

It prevents important decisions and task details from being lost when an agent’s working context is cleared or handed over.

aps-planning — Skill for Claude Code and Codex by eddacraft

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 eddacraft/anvil-plan-spec --skill aps-planning

Clone the repo

git clone --depth 1 https://github.com/eddacraft/anvil-plan-spec

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/eddacraft/anvil-plan-spec/aps-planning.svg)](https://agentmods.dev/skills/eddacraft/anvil-plan-spec/aps-planning)

Your own site

<a href="https://agentmods.dev/skills/eddacraft/anvil-plan-spec/aps-planning"><img src="https://agentmods.dev/badge/skills/eddacraft/anvil-plan-spec/aps-planning.svg" alt="Measured on agentmods" height="20"></a>

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,358 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00036	$0.02358
Opus 5	$0.00018	$0.01179
Sonnet 5	$0.00007	$0.00472
Haiku 4.5	$0.00004	$0.00236

Measured 3d ago against content hash 838cbadccfeb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

aps-planning 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 3d ago.

The scan reads SKILL.md. This mod also ships 12 executable files (scripts/check-complete.ps1, scripts/check-complete.sh, scripts/enforce-plan-update.ps1, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

aps-planning/SKILL.md · 274 lines

How it starts

The opening of the file, as written. The whole thing — 274 lines — stays where its author put it; the contents beside it link to each section on GitHub.

APS Planning Skill

Activation Guard

If plans/index.aps.md does not exist in the current project, do nothing. This skill is inert in projects without APS plans. Do not mention APS, do not offer to create plans, do not load any context. Silently skip all sections below.

Session Start -- Load Context

When a session begins and plans/index.aps.md exists, build APS awareness in working memory. Do this quietly -- do not print output to the user unless they ask about plan status.

Step 1: Read the index

Read plans/index.aps.md. Extract the Modules table. Identify active modules -- those whose status is NOT Done, Complete, Merged, Released, Shipped, Released/Shipped, or Archived. Note the plan title and any current-window notes.

Step 2: Read active modules

For each active module, read its .aps.md file from plans/modules/. Extract all work items with their fields:

ID (e.g., AUTH-001)
Title
Status (the native APS CLI currently transitions Draft, Ready, In Progress, Complete, and Blocked; it recognises Proposed as Draft and Done as Complete. This catalogue additionally follows ADR-0013: Merged / Released / Shipped / Released/Shipped are post-merge lifecycle states — not selectable for implementation; Merged is interim and advances to Complete only on release or ship evidence)
Files (from the Files: field, if present)
Validation (from the Validation: field)
Priority (if specified)
Dependencies (if specified)

Skip work items with inactive/completed statuses: Done, Complete, Merged, Released, Shipped, Released/Shipped, or Archived.

Step 3: Build the file-to-item map

From all non-Complete work items that have a Files: field, build a mapping of file paths to work item IDs. This map is used during passive awareness to recognise when edited files relate to planned work.

Example:

src/auth/login.ts -> AUTH-001, AUTH-003
src/db/migrations/ -> DB-002
packages/core/src/policy.ts -> POL-001

Read the full file on GitHub · 274 lines

Files

What ships with it

16 files 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.

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.

3d ago Changed · -20 lines · -4 tokens per session scan C → A 838cbadccfeb
8d ago First seen · 294 lines · 40 tokens per session scan C b6cebca9c558

Subscribe to this mod's changes

aps-planning is a skill published in the GitHub repository eddacraft/anvil-plan-spec (10 stars, last pushed today), licensed Apache-2.0. It adds 36 tokens to every session and 2,358 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 2026-08-31.

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