vscode-ext-context

A source-inspection utility for finding the code around a VS Code extension command registration or another matching pattern. VS Code extensions add features to the Visual Studio Code editor.

In plain words
What is it for?
Use it to inspect command handlers, trace parameter flow, examine URI handling, or search for patterns such as message-sending calls.
Why use it?
It exposes surrounding code from a minified extension file when automated analysis does not show enough detail.

Skill for Claude CodeCodex

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/inspecto-dev/inspecto/extract-context
Any agent
npx skills add inspecto-dev/inspecto --skill extract-context
Clone the repo
git clone --depth 1 https://github.com/inspecto-dev/inspecto

Made for: Claude Code, Codex.

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 357 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 $0.00098 $0.00357
Opus 5 $0.00049 $0.00179
Sonnet 5 $0.00020 $0.00071
Haiku 4.5 $0.00010 $0.00036

Measured 2d ago against content hash d5962f994713, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vscode-ext-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 2d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/extract_context.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.claude/skills/vscode-ext-probe/extract-context/SKILL.md · 44 lines

What it actually says

Extract VSCode Extension Command Context

Get raw source code around a command's registerCommand for manual analysis.

Usage

# Extract context for a specific command
python3 scripts/extract_context.py <extension-id> <command-name> [--chars 1500]

# Extract context for a keyword (not just commands)
python3 scripts/extract_context.py <extension-id> --keyword "handleUri" [--chars 2000]

# Search for any pattern in extension.js
python3 scripts/extract_context.py <extension-id> --pattern "sendText.*true" [--chars 500]

What It Does

Reads the extension's minified extension.js and extracts surrounding characters around:

  • A specific registerCommand("name" call
  • A keyword occurrence
  • A regex pattern match

This is the "escape hatch" for when automated analysis doesn't capture enough detail. Use it to:

  • See the full function body of a command handler
  • Trace how parameters flow through internal functions
  • Find related patterns (e.g., all sendText calls to determine auto-send behavior)
  • Inspect URI handler implementations
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. 2d ago First seen · 44 lines · 98 tokens per session scan A d5962f994713

Subscribe to this mod's changes

vscode-ext-context is a skill published in the GitHub repository inspecto-dev/inspecto (23 stars, last pushed 5d ago), licensed MIT. It adds 98 tokens to every session and 357 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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