prime

prime is a skill for Claude Code, Codex from earlyaidopters/marks-pi-harness. It costs 56 tokens per session (378 once invoked), scanned A, original, MIT.

A project catch-up workflow for starting work again after a break. It reads the latest handoff, project instructions, and recent Git changes, then gives a short status brief without restarting the work.

In plain words
What is it for?
Use it when you say “prime,” need to catch up, or open a fresh session on an ongoing coding project.
Why use it?
It reduces the time spent reconstructing context and highlights when the written handoff may no longer match the current files.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

Good fit Use it when you say “prime,” need to catch up, or open a fresh session on an ongoing coding project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/earlyaidopters/marks-pi-harness/prime
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 earlyaidopters/marks-pi-harness --skill prime
Clone the repo
git clone --depth 1 https://github.com/earlyaidopters/marks-pi-harness

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 prime

README.md
[![agentmods](https://agentmods.dev/badge/skills/earlyaidopters/marks-pi-harness/prime/github.svg)](https://agentmods.dev/skills/earlyaidopters/marks-pi-harness/prime)
Your own site
<a href="https://agentmods.dev/skills/earlyaidopters/marks-pi-harness/prime"><img src="https://agentmods.dev/badge/skills/earlyaidopters/marks-pi-harness/prime/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 prime

Your own site · 80×15
<a href="https://agentmods.dev/skills/earlyaidopters/marks-pi-harness/prime"><img src="https://agentmods.dev/badge/skills/earlyaidopters/marks-pi-harness/prime.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 378 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 $0.00056 $0.00378
Opus 5 $0.00028 $0.00189
Sonnet 5 $0.00011 $0.00076
Haiku 4.5 $0.00006 $0.00038

Measured 9d ago against content hash ee9dbbd6ecad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

prime 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 9d 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/prime/SKILL.md · 36 lines

What it actually says

Prime — resume a project cold

Follow exactly, in order:

1. Gather context (read, do not guess)

ls handoff/ 2>/dev/null | tail -3        # newest handoffs
  • Read handoff/LATEST.md if it exists (this is the main source of truth).
  • Read the project's AGENTS.md or CLAUDE.md if present (project conventions).
  • If a git repo: git status --short && git log --oneline -5 (what changed since the handoff).
  • If no handoff/ folder exists: say so, then briefly survey the project (ls, README, package.json) instead.

2. Brief the user (short, then stop)

Reply with exactly this structure, max ~12 lines total:

  • Where we left off: 2-3 sentences from the handoff's State section.
  • Decided: the settled decisions (do not reopen these).
  • Next up: the handoff's first 2-3 next steps, verbatim.
  • Watch out: any landmines.
  • End with: "Ready to continue — say the word or point me elsewhere."

3. Rules

  • Do NOT start working until the user confirms the direction.
  • Do NOT re-derive or second-guess settled decisions from the handoff.
  • If git shows changes NEWER than the handoff, flag them: the handoff may be stale.
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. 9d ago First seen · 36 lines · 56 tokens per session scan A ee9dbbd6ecad

Subscribe to this mod's changes

prime is a skill published in the GitHub repository earlyaidopters/marks-pi-harness (11 stars, last pushed 1mo ago), licensed MIT. It adds 56 tokens to every session and 378 once invoked, about $0.0003 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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