planning

A disciplined way to create implementation plans and decision records for software work. It covers breaking work into manageable tasks, choosing validation steps, recording risks, and checking that a plan is complete.

In plain words
What is it for?
Use it when planning features, refactors, architecture decisions, or tasks that need explicit testing and production-like verification.
Why use it?
It reduces vague plans that are difficult to build or verify, and makes the intended work and tests clear before implementation starts.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/romiluz13/cc10x/planning
Any agent
npx skills add romiluz13/cc10x --skill planning
Clone the repo
git clone --depth 1 https://github.com/romiluz13/cc10x

Made for: Claude Code, Codex.

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,873 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00046 $0.01873
Opus 5 $0.00023 $0.00937
Sonnet 5 $0.00009 $0.00375
Haiku 4.5 $0.00005 $0.00187

Measured 2d ago against content hash 934f2da4d0ed, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 2d 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.

plugins/cc10x/skills/planning/SKILL.md · 164 lines

How it starts

The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planning

Distill plans into durable, buildable artifacts. A plan is a contract, not a brainstorm.

Reference Files

  • references/live-verification-strategy.md — when and how to plan live/production verification; load when the request calls for production-like confidence (real integrations, deployment, live data) or any task's validation level is Live

Bite-Sized Task Granularity

Each task must fit a single fresh context window: one builder can read the referenced files, implement, and test it without compaction. A task that outlives its window gets finished by a degraded agent — split it. Signs a task is too big: "and then...", multiple unrelated files, multiple test scenarios, more than 3 sub-steps.

Test per task: Every task must have at least one test that verifies its completion. If you can't name the test, the task isn't specific enough.

Plan Document Header

# [Feature Name] Plan

## Metadata
- Created: [date]
- Status: [draft|approved|in-progress|complete]
- Verification Rigor: [standard|critical_path]
- Plan Mode: [direct|execution_plan|decision_rfc]

## Agreement Snapshot
- **Goal:** [one sentence]
- **Constraints:** [list]
- **In Scope:** [list]
- **Out of Scope:** [list]
- **Open Decisions:** [list or "none"]

Task Structure

Each task in the plan:

### Task N: [Component Name]
**Objective:** [what this task achieves]
**Files/Surfaces:** [exact files to create/modify]
**Dependencies:** [previous task IDs or "none"]
**Allowed Scope:** [what's in bounds]
**Out-of-Scope Drift:** [what would be scope creep]
**Expected Artifacts:** [what this produces]
**Required Checks:** [tests/verification needed]
**Checkpoint Type:** [none|human_verify|decision|human_action]
**Exit Criteria:** [how to know this task is done]

**Consumes:** [exact signatures used from earlier phases — verbatim]
**Produces:** [exact names later phases rely on — verbatim]

If no Consumes/Produces: write Consumes: none / Produces: none explicitly.

Read the full file on GitHub · 164 lines

Files

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.

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. 2d ago First seen · 164 lines · 46 tokens per session scan A 934f2da4d0ed

Subscribe to this mod's changes

planning is a skill published in the GitHub repository romiluz13/cc10x (164 stars, last pushed 29d ago), licensed MIT. It adds 46 tokens to every session and 1,873 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 2026-08-30.

Related

Other skills, from other repositories

create-request

Create, update, or scan per-task request tickets for progress tracking. These are date-prefixed non-lifecycle docs under requests/, NOT feature-level requirements (use /req-analyze for those). Use when: tracking task progress, updating completion status, scanning incomplete requests, checking request status dashboard.…

sd0xdev/sd0x-harness · 112 tokens

codex-setup

Initialize sd0x-dev-flow infrastructure for Codex CLI and other non-Claude agents. Generates AGENTS.md, installs the commit-msg hook, copies runner scripts. The pre-push gate is opt-in via --with-push-gate. Use when setting up a new project or after updating skills.

sd0xdev/sd0x-harness · 65 tokens

codex-code-review

Code review using Codex MCP. Use when: PR review, code audit, second opinion on changes. Not for: doc review (use doc-review), security audit (use security-review). Output: severity-grouped findings + merge gate.

sd0xdev/sd0x-harness · 53 tokens

meta-harness-terminal-bench-2

Run one iteration of AgentHarness evolution for Terminal-Bench 2.

stanford-iris-lab/meta-harness · 23 tokens

meta-harness

Run one iteration of memory system evolution. Called by metaharness.py or interactively via /meta-harness.

stanford-iris-lab/meta-harness · 27 tokens

adr

Write an Architecture Decision Record (ADR) for a feature — Context / Decision / Status / Consequences / Alternatives, filed as docs/features/ /adr- - .md with a 3-digit zero-padded number. Handles the Superseded case: bidirectional linking when a new ADR replaces an old one. Use when: recording why an architectural…

sd0xdev/sd0x-harness · 144 tokens