security-investigator: Skill for Claude Code

.github/skills/context-memory-review/SKILL.md

context-memory-review is a skill for Claude Code, Codex from SCStelz/security-investigator. It costs 106 tokens per session (3,454 once invoked), scanned A, original, MIT.

A weekly, proposal-only review of a security investigation's context file against recent scan reports and findings. The context file is a local record of known facts, such as trusted IP addresses, devices, people, and false positives.

In plain words
What is it for?
Use it to compare recent SOC security scans and the Mission Control findings log with the current investigation context, then produce evidence-backed ADD, MODIFY, or FLAG suggestions.
Why use it?
It finds new or changed facts that may be missing from the context file without editing that file automatically. A human can review the suggested additions, changes, or warnings first.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

This is SCStelz/security-investigator's own configuration. It tells Claude Code and Codex how to work on security-investigator itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything security-investigator configures →

Reuse

Borrowing it

Nothing to install: this file belongs to SCStelz/security-investigator. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/SCStelz/security-investigator/main/.github/skills/context-memory-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/SCStelz/security-investigator

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 context-memory-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/scstelz/security-investigator/context-memory-review/github.svg)](https://agentmods.dev/skills/scstelz/security-investigator/context-memory-review)
Your own site
<a href="https://agentmods.dev/skills/scstelz/security-investigator/context-memory-review"><img src="https://agentmods.dev/badge/skills/scstelz/security-investigator/context-memory-review/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 context-memory-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/scstelz/security-investigator/context-memory-review"><img src="https://agentmods.dev/badge/skills/scstelz/security-investigator/context-memory-review.svg" alt="Reviewed on agentmods" width="80" 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 3,454 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00106 $0.03454
Opus 5 $0.00053 $0.01727
Sonnet 5 $0.00021 $0.00691
Haiku 4.5 $0.00011 $0.00345

Measured 11d ago against content hash 71f7932869a2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

context-memory-review 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 11d 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.

.github/skills/context-memory-review/SKILL.md · 254 lines

How it starts

The opening of the file, as written. The whole thing — 254 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Context Memory Review — Instructions

Purpose

Investigation workflows in this project lean on a tenant-context memory file — a local, gitignored living document that records environment-specific ground truth (known automation/orchestration fingerprints, known-good IPs, account classifications, honeypot/field-device inventory, validated personnel, and documented false-positive rules). Scan automations (e.g. the daily Threat Pulse) read that file to render accurate verdicts.

Over a week of scans, drill-down investigations validate new ground truth — new IPs, new personas, new FP classes, new device classes — that is not yet captured in the context file. This skill reads two evidence sources — the last N days of scan reports and the Mission Control findings log (state/findings.json, the structured record of analyst-triggered skill drill-downs) — compares them against the current context file, and produces a propose-only review document: a list of discrete, human-reviewable candidate changes (ADD / MODIFY / FLAG) with section anchors, proposed text, supporting evidence, recurrence counts, and confidence.

Memory file location. In this project the context file is a relative filename under .copilot/memories/repo/ (Copilot's own repo-memory folder, gitignored). The invoking prompt may pass just the basename; resolve it under that folder. The file is environment-specific and never committed.

This skill is the first half of a deliberate two-phase, human-in-the-loop workflow:

Phase Who Action
1. Propose (this skill) Automation / interactive Read reports + context file → emit review doc. No edits.
2. Apply (separate, manual) Human-directed interactive session Operator reviews the doc, says "apply items X, Y, Z" → surgical edits to the context file.

🔴 CRITICAL RULES — READ FIRST

  1. PROPOSE-ONLY. NEVER edit the context file in this skill. Do not write, append to, or modify the context memory file. Do not git commit, push, or open a PR. The only file this skill writes is the review document in the output directory.

Read the full file on GitHub · 254 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. 11d ago First seen · 254 lines · 106 tokens per session scan A 71f7932869a2

Subscribe to this mod's changes

context-memory-review is a skill published in the GitHub repository SCStelz/security-investigator (245 stars, last pushed 2d ago), licensed MIT. It adds 106 tokens to every session and 3,454 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 2026-08-30.

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