phase-driver

phase-driver is a skill for Claude Code, Codex from sixoverground/claude-phases. It costs 106 tokens per session (7,116 once invoked), scanned A, original, MIT.

A workflow for carrying out a phased implementation plan stored in a repository document. It selects the next phase, implements it, opens a pull request, monitors automated checks and review, and merges after the required gates pass.

In plain words
What is it for?
Use it to run, resume, or check phased projects, manage one pull request per phase, and pause, skip, or merge phases when their conditions are met.
Why use it?
It keeps work organised across separate phases and preserves progress in the plan so another session can recover and continue if needed.

Skill for Claude CodeCodex

Part of the claude-phases plugin — 2 skills shipped together

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/sixoverground/claude-phases/phase-driver
Any agent
npx skills add sixoverground/claude-phases --skill phase-driver
Clone the repo
git clone --depth 1 https://github.com/sixoverground/claude-phases

Made for: Claude Code, Codex.

Or install claude-phases, the plugin that ships this one along with the rest of its 2 skills.

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 phase-driver

README.md
[![agentmods](https://agentmods.dev/badge/skills/sixoverground/claude-phases/phase-driver.svg)](https://agentmods.dev/skills/sixoverground/claude-phases/phase-driver)
Your own site
<a href="https://agentmods.dev/skills/sixoverground/claude-phases/phase-driver"><img src="https://agentmods.dev/badge/skills/sixoverground/claude-phases/phase-driver.svg" alt="Measured on agentmods" height="20"></a>
Per session 106 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,116 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 $0.00106 $0.07116
Opus 5 $0.00053 $0.03558
Sonnet 5 $0.00021 $0.01423
Haiku 4.5 $0.00011 $0.00712

Measured 5d ago against content hash b8d9bb70f922, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

phase-driver 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.

skills/phase-driver/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.

Phase driver

You execute a phased plan. The plan file is your only durable memory: the session running you can be reclaimed at any moment, and the next one starts knowing nothing. Write state down before you act on it, and everything survives.

Read references/recovery.md, references/gates.md, and references/vocabulary.md when you reach the steps that need them, not up front.

Golden rules

  1. Never modify the plan file from a phase branch. Plan writes go to home_repo's plan branch, always.
  2. Write status before the action it describes, not after. Claim before branching; record the PR before waiting on it.
  3. Pass the sha you just read on every plan write. A stale sha means another driver moved: re-read, re-check whose claim it is now, and don't overwrite.
  4. Every plan commit message ends [skip ci].
  5. One phase = one PR = one repo.
  6. Re-read the head SHA immediately before anything irreversible and re-check the gate against it.
  7. If your context was compacted or you don't remember starting this: re-read this file and the plan, run Reconcile, and continue. That is the normal path, not an error.
  8. Never claim work you didn't do. If tests didn't run, say so in the PR body. If you can't tell why CI failed, say that and link the run.

1. Find the plan

Look for docs/plans/*.md in the current repo. More than one, and no phase named: list them and ask.

Parse the front matter under phases:. That is your entire configuration. Resolve per-repo settings by deep-merging each repo's entry over defaults. Never look for configuration anywhere else; there is no other config file.

The plan branch is plan_branch, or the home repo's default branch when that key is absent. Every read and every write of the plan file uses it. It is usually the default branch; on feature-branch work. Where phases target feature/x and nothing reaches main until the feature is whole. The plan lives there instead, so that status is visible without merging a phase PR. If plan_branch names a branch that doesn't exist, stop and say so. Never fall back to the default branch: a plan read from the wrong branch reports every phase as unstarted, and the driver would start them all a second time.

Read the full file on GitHub · 274 lines

Files

What ships with it

3 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.

  1. 5d ago First seen · 274 lines · 106 tokens per session scan A b8d9bb70f922

Subscribe to this mod's changes

phase-driver is a skill published in the GitHub repository sixoverground/claude-phases (2 stars, last pushed today), licensed MIT. It adds 106 tokens to every session and 7,116 once invoked, about $0.0005 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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