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.
npx agentmods add skills/microsoft/shadowfrog/shadow-frog-viewernpx skills add microsoft/ShadowFrog --skill shadow-frog-viewergit clone --depth 1 https://github.com/microsoft/ShadowFrogWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00053 | $0.01681 |
| Opus 5 | $0.00026 | $0.00840 |
| Sonnet 5 | $0.00011 | $0.00336 |
| Haiku 4.5 | $0.00005 | $0.00168 |
Grade A, and why
shadow-frog-viewer 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.
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.
How it starts
The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ShadowFrog Viewer
Query and browse .shadow/ content. Prerequisite: .shadow/ exists.
Primary: Python Helper Script
The companion script shadow-viewer.py lives in the same directory as
this SKILL.md file. To find and run it:
# Project install (Copilot CLI):
python3 .github/skills/shadow-frog-viewer/shadow-viewer.py [options]
# Or for Claude Code:
python3 .claude/skills/shadow-frog-viewer/shadow-viewer.py [options]
Available Views
| Command | What it shows |
|---|---|
--summary |
Overview: counts, source/status/label breakdown, per-file table, cross-cutting titles (default) |
--search QUERY |
Universal search — matches file names, symbol names, and discovery text. Includes cross-cutting and preferences |
--prefs |
Project-wide preferences |
--recent [N] |
N most recent discoveries with full content (default: 10) |
--labels LABEL |
Discoveries filtered by label (e.g., bug, security, bug,performance) |
--top FILE |
Top actionable discoveries for FILE — concise output (default: 3 entries, ~600 chars) suitable for the preToolUse hook. Includes both per-file shadow entries and any _cross/ discoveries that reference FILE. Verified discoveries rank first. |
--check-invariants |
Audit structural integrity — bidirectional cross-references, label/source/category enum compliance, heading format, no-orphan-back-pointer. Exits 0 if clean, 1 with one violation per line. Run after dream reconciliation or before commit. |
No arguments defaults to --summary.
Options
| Flag | Effect |
|---|---|
--shadow-dir DIR |
Override .shadow/ location (default: auto-detect from CWD) |
--top-labels LABELS |
Comma-separated label filter for --top (default: bug,security). Empty string disables label filtering. |
--top-limit N |
Max discoveries to show in --top (default: 3) |
--top-max-chars N |
Hard cap on --top total output length (default: 600). Use 0 for no cap. |
Examples
What ships with it
2 files 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.
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.
- 2d ago First seen · 163 lines · 53 tokens per session scan A 8e55d7d85a43
shadow-frog-viewer is a skill published in the GitHub repository microsoft/ShadowFrog (21 stars, last pushed 13d ago), licensed MIT. It adds 53 tokens to every session and 1,681 once invoked, about $0.0003 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.
Other skills, from other repositories
use-agent-browser-for-airi
Test AIRI display-model imports with agent-browser across stage-tamagotchi Electron, stage-web, and stage-pocket mobile web layouts. Use when uploading and verifying contributor-supplied Live2D ZIP, VRM, or MMD ZIP/PMX/PMD files through AIRI's model selector, including onboarding bypass, format-specific import…
opencli-sitemap-author
Use when creating or maintaining OpenCLI site sitemaps: agent-facing navigation, page-state, action, workflow, API-reference, pitfall, and fallback knowledge for a website. Use after browser exploration discovers durable site context, when a sitemap is stale, or when promoting local site knowledge into the repo.
debug-optimize-lcp
Guides debugging and optimizing Largest Contentful Paint (LCP) using Chrome DevTools MCP tools. Use this skill whenever the user asks about LCP performance, slow page loads, Core Web Vitals optimization, or wants to understand why their page's main content takes too long to appear. Also use when the user mentions…
pinchtab-mcp
Use this skill when a task requires browser automation through PinchTab's MCP server connected to a remote browser instance. Covers navigation, element interaction, data extraction, form filling, multi-step flows, and session management via MCP tools.
traceway-setup
Analyze and instrument repositories for Traceway observability. Use when the user wants to plan, add, migrate, or verify Traceway or OpenTelemetry monitoring for backend, browser, full-stack, mobile or iOS, or AI-agent software, including project topology and user-approved setup-plan creation. Backends use OTLP/HTTP…
southwest
Search Southwest Airlines fares and points pricing via Patchright browser automation. SW is not in any GDS or API. Covers all fare classes, Companion Pass value, and fare drop monitoring.