surgical-patch

surgical-patch is a skill for Codex from mrDesign-ww/vault-os. It costs 34 tokens per session (120 once invoked), scanned A, original, MIT.

A focused method for fixing bugs and small behavior changes at the narrowest code layer responsible.

In plain words
What is it for?
It is for reproducing bugs, applying small targeted fixes, and running relevant regression tests.
Why use it?
It limits unrelated edits and requires proof that the failure is fixed without changing surrounding behavior.

Skill for Codex

Written for Codex: agents/openai.yaml present.

Good fit It is for reproducing bugs, applying small targeted fixes, and running relevant regression tests.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mrdesign-ww/vault-os/surgical-patch
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 mrDesign-ww/vault-os --skill surgical-patch
Clone the repo
git clone --depth 1 https://github.com/mrDesign-ww/vault-os

Made for: 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 surgical-patch

README.md
[![agentmods](https://agentmods.dev/badge/skills/mrdesign-ww/vault-os/surgical-patch/github.svg)](https://agentmods.dev/skills/mrdesign-ww/vault-os/surgical-patch)
Your own site
<a href="https://agentmods.dev/skills/mrdesign-ww/vault-os/surgical-patch"><img src="https://agentmods.dev/badge/skills/mrdesign-ww/vault-os/surgical-patch/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 surgical-patch

Your own site · 80×15
<a href="https://agentmods.dev/skills/mrdesign-ww/vault-os/surgical-patch"><img src="https://agentmods.dev/badge/skills/mrdesign-ww/vault-os/surgical-patch.svg" alt="Reviewed on agentmods" width="80" 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 120 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 $0.00034 $0.00120
Opus 5 $0.00017 $0.00060
Sonnet 5 $0.00007 $0.00024
Haiku 4.5 $0.00003 $0.00012

Measured 7d ago against content hash 81ea9f7b5140, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

surgical-patch 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 7d 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.

shell/claude/skills/surgical-patch/SKILL.md · 17 lines

What it actually says

Surgical patch

Reproduce failure first when economical; otherwise capture strongest available evidence.

  • Trace symptom to responsible mechanism.
  • Change narrowest layer that owns incorrect behavior.
  • Preserve unrelated behavior and user changes.
  • Avoid cleanup, renaming, and abstraction outside fix.
  • Add only regression proof relevant to task.

Run focused proof plus nearest affected gate. Stop when failure is fixed and regression proof passes.

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. 7d ago First seen · 17 lines · 34 tokens per session scan A 81ea9f7b5140

Subscribe to this mod's changes

surgical-patch is a skill published in the GitHub repository mrDesign-ww/vault-os (2 stars, last pushed 5d ago), licensed MIT. It adds 34 tokens to every session and 120 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 2026-09-05.

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