scope-guard

scope-guard is a skill for Claude Code, Codex from msolecki/founder-os. It costs 33 tokens per session (1,867 once invoked), scanned A, original, MIT.

A scope-checking guide that compares a client's new request with the exclusions in the signed proposal. Scope means the work the agreement includes.

In plain words
What is it for?
Use it when a client asks for unquoted work and at renewal to review extras already provided.
Why use it?
It makes it clear when a small extra request is outside the agreement and should not be absorbed for free.

Skill for Claude CodeCodex

Part of the founder-os plugin — 57 skills, 13 agents, 4 hooks, 1 MCP server 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/msolecki/founder-os/scope-guard
Any agent
npx skills add msolecki/founder-os --skill scope-guard
Clone the repo
git clone --depth 1 https://github.com/msolecki/founder-os

Made for: Claude Code, Codex.

Or install founder-os, the plugin that ships this one along with the rest of its 57 skills, 13 agents, 4 hooks, 1 MCP server.

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 scope-guard

README.md
[![agentmods](https://agentmods.dev/badge/skills/msolecki/founder-os/scope-guard.svg)](https://agentmods.dev/skills/msolecki/founder-os/scope-guard)
Your own site
<a href="https://agentmods.dev/skills/msolecki/founder-os/scope-guard"><img src="https://agentmods.dev/badge/skills/msolecki/founder-os/scope-guard.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,867 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 $0.00033 $0.01867
Opus 5 $0.00016 $0.00933
Sonnet 5 $0.00007 $0.00373
Haiku 4.5 $0.00003 $0.00187

Measured 4d ago against content hash dfd1c18a29b2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

scope-guard 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 4d 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.

founder-os/skills/scope-guard/SKILL.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scope Guard

Scope creep does not arrive as a demand. It arrives as a friendly Slack message with the word "quick" in it, and the founder says yes because saying no would be awkward for eleven seconds. This skill makes the eleven seconds cheaper than the hours.

When to use

The moment an ask lands that was not in the proposal — "while you're in there", "one small tweak", "could you also just". Also at every renewal, to count what was absorbed last time and price it.

Inputs

Read first, in order — house rule 1:

  • pipeline.md ## Won — this client's entry, and under it the verbatim Exclusions: lines from the proposal they signed. Those lines are your baseline. Read them; do not summarise them. proposal-draft writes them and pipeline-review carries them into ## Won at close, where they stay for the life of the engagement — ## Live is rewritten every Thursday and a live engagement is not on it.
  • offer.md — the offer boundary: what this company sells at all
  • clients/<client>.md — what has already been absorbed on this engagement, and the running count

If the client has no ## Won entry, or the entry carries no Exclusions: lines, stop. That is the finding, and it is worth more than the ruling: this engagement has no written boundary, so every ask from here to renewal is a negotiation against the founder's mood on the day. Hand to the Pipeline Coachproposal-draft owns that gap.

A count is not a list. If the entry says how many exclusions there were rather than what they were, you have no baseline — you have a number telling you a baseline existed somewhere else. Treat it as the empty case and hand it over.

Beliefs

  • An exclusion earns its value when it is read aloud, not when it is produced. Its commercial job is to make the client register a boundary before money moves. An exclusion the client never actually took in will surprise them at week six, and the surprise spends exactly the goodwill the list was written to protect — even when the list plainly covers the ask.
  • Silence in a proposal is the founder's defect, not the client's opportunism. A client asking for the thing nobody thought to exclude is behaving reasonably. Every undecided ask is a note for the next proposal; treat it as a character flaw in this client and the same gap ships eleven more times.
  • "Quick" is a pricing claim made by the person who is not doing the work, and it is the least reliable word in the relationship. It does not mean the estimate is small. It means there is no estimate.
  • Absorbed hours cluster on the warmest relationships, not the most adversarial ones. Difficult clients ask formally and get priced; friendly clients ask casually and get absorbed. Rank absorbed hours per client and the ranking will not match the founder's affection — it will invert it.

Read the full file on GitHub · 153 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. 4d ago First seen · 153 lines · 33 tokens per session scan A dfd1c18a29b2

Subscribe to this mod's changes

scope-guard is a skill published in the GitHub repository msolecki/founder-os (4 stars, last pushed yesterday), licensed MIT. It adds 33 tokens to every session and 1,867 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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