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 agents/mareurs/codescout/cursorgit clone --depth 1 https://github.com/mareurs/codescoutWhat 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 | $0.00000 | $0.02101 |
| Opus 5 | $0.00000 | $0.01051 |
| Sonnet 5 | $0.00000 | $0.00420 |
| Haiku 4.5 | $0.00000 | $0.00210 |
Grade A, and why
cursor 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 yesterday.
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 — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cursor
codescout works with Cursor Agent chat via the MCP protocol. Once registered, Cursor uses codescout's symbol and semantic tools for all code navigation instead of reading source files directly.
One-Time Setup
Prerequisites: Cursor (latest), Rust toolchain.
Install codescout:
cargo install codescout
The binary lands at ~/.cargo/bin/codescout. Make sure ~/.cargo/bin is in your PATH.
Next, clone the codescout-companion repository — this provides the workflow skills, enforcement hook, and code-reviewer agent used in the steps below. The commands use path/to/copilot-codescout as a placeholder for wherever you cloned it.
Register codescout as an MCP server
Recommended: project-level registration — checked into git, shared with your team. Create
.cursor/mcp.json in your project root:
{
"mcpServers": {
"codescout": {
"command": "codescout",
"args": ["start"]
}
}
}
Note: Cursor uses
"mcpServers"(withs), unlike VS Code's"servers". Ifcargois not in PATH, use the full path as thecommandvalue (e.g.~/.cargo/bin/codescout).
Alternative: global registration — available in all projects. Open Cursor → Settings → Cursor Settings → MCP → Add new server → paste the same config block.
Once registered, codescout's system prompt injects automatically into every Agent session.
Add workflow skills
Cursor discovers rules in .cursor/rules/. Two options:
Option A — Convert each skill to .mdc format (recommended):
For each skill in path/to/copilot-codescout/Skills/, create a corresponding
.cursor/rules/<name>.mdc file:
mkdir -p .cursor/rules
Each .mdc file follows this format:
---
description: [paste the description from skill frontmatter]
globs:
alwaysApply: false
---
[paste the full skill body here]
Set alwaysApply: false — Cursor auto-applies rules based on description matching, the same
model-invoked behavior as Copilot Skills.
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.
- yesterday First seen · 234 lines · 0 tokens per session scan A 52502ca0fc22
cursor is an agent published in the GitHub repository mareurs/codescout (21 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,101 tokens. 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 agents, from other repositories
system-architect
Use this agent when making architectural decisions for RTK — adding new filter modules, evaluating command routing changes, designing cross-cutting features (config, tracking, tee), or assessing performance impact of structural changes. Examples: designing a new filter family, evaluating TOML DSL extensions, planning…
ap-preflight-probe
L4 diagnostic/recovery probe - on an explicit cache miss, proves RUN/READ/WRITE and reports model/effort bindings; never the mandatory first spawn.
ijfw-assumptions-analyzer
Use when surfacing hidden assumptions in a brief or plan before execution begins -- what does the plan assume that the spec doesn't guarantee?
ijfw-accessibility-reviewer
Design-phase WCAG 2.1 AA review of UI artefacts: contrast, semantics, focus, ARIA. Trigger per design review pass.
ring:qa
Senior QA Analyst for financial systems. Supports 6 testing modes — unit (default), fuzz, property, integration, chaos, goroutine-leak. Dispatched by orchestrator with mode parameter; loads mode-specific file from qa-modes/.
integration-reviewer
Runtime integration validator — read-only. Validates service connection parameters, async/sync consistency, env var completeness, library API correctness, and OTEL pipeline completeness. Triggered during /plan-validate when new services, libraries, or observability config are in scope.