system-boot

system-boot is a skill for Claude Code, Codex from primeline-ai/claude-code-starter-system. It costs 34 tokens per session (1,357 once invoked), scanned A, original, MIT.

A project-session setup guide that loads saved project notes and shows the current project status when a coding session starts. It also sets rules for handling context, memory, delegation, and handoffs.

In plain words
What is it for?
Use it at session startup to read project memory, report status, and establish working guidelines.
Why use it?
It helps an agent regain the project’s goals, progress, next step, and known blockers without relying only on the current chat.

Skill for Claude CodeCodex

Part of the claude-code-starter-system plugin — 1 skill, 4 commands 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/primeline-ai/claude-code-starter-system/system-boot
Any agent
npx skills add primeline-ai/claude-code-starter-system --skill system-boot
Clone the repo
git clone --depth 1 https://github.com/primeline-ai/claude-code-starter-system

Made for: Claude Code, Codex.

Or install claude-code-starter-system, the plugin that ships this one along with the rest of its 1 skill, 4 commands.

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 system-boot

README.md
[![agentmods](https://agentmods.dev/badge/skills/primeline-ai/claude-code-starter-system/system-boot.svg)](https://agentmods.dev/skills/primeline-ai/claude-code-starter-system/system-boot)
Your own site
<a href="https://agentmods.dev/skills/primeline-ai/claude-code-starter-system/system-boot"><img src="https://agentmods.dev/badge/skills/primeline-ai/claude-code-starter-system/system-boot.svg" alt="Measured on agentmods" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,357 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 $0.00034 $0.01357
Opus 5 $0.00017 $0.00678
Sonnet 5 $0.00007 $0.00271
Haiku 4.5 $0.00003 $0.00136

Measured 5d ago against content hash 2895bc4e0e41, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

system-boot 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/system-boot/SKILL.md · 169 lines

How it starts

The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.

System Boot - Context Loader + Session Guidelines

You are loading the project context for the current session. Follow these steps in order, then apply the session guidelines throughout.


Part 1: Context Loading

Step 1: Read the Memory Index

Read .claude/memory/index.json to get the active project name.

If this file does not exist, skip to the "No Memory Found" fallback at the bottom.

Step 2: Read Project State

Read .claude/memory/projects/{active}.json where {active} is the project name from Step 1.

This file contains the project goals, current phase, progress log, and any known blockers.

If this file does not exist, skip to the "No Memory Found" fallback.

Step 3: Present Context Block

Output a compact context block in this format:

Project: {name} | Phase: {phase}
Last progress: {summary of the most recent entry in the progress array}
Next step: {suggested_next from the latest progress entry, or the first unfinished goal}
Known blockers: {any blocking issues listed in the blockers field, or "none"}

Rules for the context block:

  • Keep it under 200 tokens total
  • Summarize progress entries - do not paste them verbatim
  • If there are multiple goals, show only the primary one
  • If blockers is empty or missing, show "none"

Step 4: Check for Recent Handoff

Look for the most recent file in .claude/handoffs/ (sort by filename, newest first).

If a handoff file exists:

  • Read it
  • Add a brief summary to the context block:
    Last handoff: {date from filename}
    Next action: {content from the "Next Session" section of the handoff}
    

If no handoff files exist, skip this step.

Step 5: Ready to Work

After showing the context block, say one sentence about what you are ready to help with, based on the next step from the handoff or the latest progress entry.

Example: "Ready to continue with {next step}. What would you like to tackle first?"


Part 2: Session Guidelines

These guidelines apply throughout the entire session, not just at boot.

Read the full file on GitHub · 169 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. 5d ago First seen · 169 lines · 34 tokens per session scan A 2895bc4e0e41

Subscribe to this mod's changes

system-boot is a skill published in the GitHub repository primeline-ai/claude-code-starter-system (5 stars, last pushed 20d ago), licensed MIT. It adds 34 tokens to every session and 1,357 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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