Signals scout: CSP violations Agent Skill

Signals scout for Content Security Policy violations.

Context cost
10.4k tokensestimated from the bundle, loaded when it triggers
Bundle
1 file · 41.5 kBtext throughout, nothing executable
Licence
MITthe author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Signals scout for Content Security Policy violations. Watches `$csp_violation` events for blocked-URL clusters, per-directive bursts, post-deploy regressions, and suspicious third- party domains.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

securitytesting

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md41.5 kB · preview
--- name: signals-scout-csp-violations scout-display-name: CSP violations compatibility: > PostHog Signals agent (Claude sandbox). Read-only analytics + signal_scout_internal:write (scratchpad) + signal_scout_report:write (report channel), plus the analytics tools in the MCP tools section (execute-sql over `$csp_violation` events, read-data-schema, advanced-activity-logs-list). allowed_tools: - emit_report - edit_report metadata: owner_team: signals scope: csp_violations ---
21# Signals scout: CSP violations
22
23You are a focused CSP scout. Spot meaningful changes in this team's $csp_violation event stream — fresh blocked-URL domains, per-directive bursts, deploy-correlated page regressions, suspicious third-party scripts — and file reports only when a cluster clears the bar.
24
25CSP violations are unusual on the noise/signal spectrum: a single user with a misbehaving browser extension can pollute thousands of reports, while a genuine script compromise might surface as five carefully crafted requests from a fresh domain. **Reach (distinct users + distinct documents) matters more than raw count**. Internalize that shape.
26
27You author reports directly via the report channel (scout-emit-report / scout-edit-report): you've done the research, so you own each report 1:1 end-to-end rather than firing weak signals for a pipeline to cluster. The bar is correspondingly high — file a report only for an aggregated cluster (a fresh blocked domain, a standing enforced block, a deploy-correlated directive burst) you'd stand behind as a standalone inbox item a human will act on. A cluster the inbox already covers is an **edit only when something moved materially** — reach grew, disposition flipped to enforce, the verdict changed; a steady-state "still blocked, same reach" is a scratchpad re-confirmation, not an append every run. A **new blocked domain or directive is a new cluster and a new report**, even while a sibling domain's report is still open. The harness prompt carries the full report-channel contract (fields, status mapping, reviewer routing, dedupe, the priority / repository fields, and the edit rules), and authoring-scouts → references/report-contract.md is the deep reference (readable in-run via skill-file-get); this body adds only the CSP-specific framing — do not restate the generic mechanics. (Note: this surface has a companion **push** path that files raw per-fingerprint signals under source_product=csp_reporting; your own report-channel reports persist under source_product=signals_scout. Both live in the same inbox — see Decide for how they interact.)
28
29## Activity-history availability
30
31Activity history is optional. Use the reader guidance supplied by MCP only when that capability is available; this applies to every history check below and in bundled references.
32
33If a history reader is unavailable or access is denied, stop using that reader for the rest of this run. Do not retry its discovery, probe endpoints to bypass the restriction, or file a missing-tool report for a confirmed access restriction. Continue using other advertised, authorized history readers, including per-object readers; skip only checks that have no available reader. Continue independent checks and note the unavailable history in the close-out. Missing history does not mean no configuration change occurred: defer conclusions that require ruling out an intentional edit, and report only findings supported independently.
34
35## Quick close-out: is CSP reporting even active?
36
37If $csp_violation is absent from top_events or its count is at baseline (no fresh 24h activity, recent_24h_count ≪ count / 7), CSP reporting probably isn't where the signal is today. Cheap scratchpad entry + close out:
38
39- key: pattern:csp_violations:baseline-team{team_id}
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md5,780 words
Files1
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈180
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
10,195
on trigger
The instruction body, read only when the skill fires.
5.2%
of a 200k window
Ten skills this size would take about 52% of the window before you open a file.
050k100k150k200k context window

10.4k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

It writes no files and reaches no network. All it changes is how the model reasons and writes.

What it asks for
Writes filesno
Network accessno

Read from the allowed-tools line of this skill’s own SKILL.md. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

1 file, 41.5 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md41.5 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 1 file you can review in full before installing. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Signals scout: CSP violations · 10.4k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/signals-scout-csp-violations/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/signals-scout-csp-violations" ] && { [ ! -e .claude/skills/signals-scout-csp-violations ] || { mv .claude/skills/signals-scout-csp-violations "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/signals-scout-csp-violations" .claude/skills/ && echo "Installed .claude/skills/signals-scout-csp-violations"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add posthog/signals-scout-csp-violations

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/signals-scout-csp-violations/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/signals-scout-csp-violations/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/signals-scout-csp-violations" ] && { [ ! -e ~/.claude/skills/signals-scout-csp-violations ] || { mv ~/.claude/skills/signals-scout-csp-violations "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/signals-scout-csp-violations" ~/.claude/skills/ && echo "Installed ~/.claude/skills/signals-scout-csp-violations" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/signals-scout-csp-violations/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referenceposthog/signals-scout-csp-violations

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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