session-context

session-context is a skill for Claude Code, Codex from sandraschi/streamfog-mcp. It costs 17 tokens per session (130 once invoked), scanned A, original, MIT.

A session-start checklist for Streamfog MCP, which controls augmented-reality lenses, face filters, and virtual avatars on an OBS live stream.

In plain words
What is it for?
It is for checking bridge health, listing available lenses, confirming dispatched effects, and reloading the lens list after changes.
Why use it?
It makes the agent check that the control bridge works and that the requested effects exist before taking action.

Skill for Claude CodeCodex

Part of the streamfog-mcp plugin — 2 skills, 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/sandraschi/streamfog-mcp/session-context
Any agent
npx skills add sandraschi/streamfog-mcp --skill session-context
Clone the repo
git clone --depth 1 https://github.com/sandraschi/streamfog-mcp

Made for: Claude Code, Codex.

Or install streamfog-mcp, the plugin that ships this one along with the rest of its 2 skills, 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 session-context

README.md
[![agentmods](https://agentmods.dev/badge/skills/sandraschi/streamfog-mcp/session-context.svg)](https://agentmods.dev/skills/sandraschi/streamfog-mcp/session-context)
Your own site
<a href="https://agentmods.dev/skills/sandraschi/streamfog-mcp/session-context"><img src="https://agentmods.dev/badge/skills/sandraschi/streamfog-mcp/session-context.svg" alt="Measured on agentmods" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 130 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 $0.00017 $0.00130
Opus 5 $0.00009 $0.00065
Sonnet 5 $0.00003 $0.00026
Haiku 4.5 $0.00002 $0.00013

Measured 3d ago against content hash 2e232ebfc875, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

session-context 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 3d 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.

.opencode/skills/session-context/SKILL.md · 18 lines

What it actually says

Session Context (Streamfog MCP)

You can control Streamfog AR lenses, face filters, and Vtuber avatars on the live OBS stream via the Streamer.bot bridge.

Before starting work:

  1. Check bridge health: streamfog_status()
  2. List available lenses: streamfog_list_lenses()

At end of work, save state:

  • Confirm the last dispatched action resolved to the intended lens or effect
  • If lenses.json was edited, reload with streamfog_list_lenses(reload=True)
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. 3d ago First seen · 18 lines · 17 tokens per session scan A 2e232ebfc875

Subscribe to this mod's changes

session-context is a skill published in the GitHub repository sandraschi/streamfog-mcp (1 stars, last pushed 3d ago), licensed MIT. It adds 17 tokens to every session and 130 once invoked, about $0.0001 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.