backlink-gap

backlink-gap is a skill for Claude Code from indranilbanerjee/digital-marketing-pro. It costs 178 tokens per session (2,630 once invoked), scanned A, original, MIT.

A backlink-research workflow that finds websites linking to competitors but not to you. Backlinks are links from other websites, often used when assessing search visibility.

In plain words
What is it for?
Planning link building, running backlink audits, qualifying digital-PR prospects, and creating an initial outreach list.
Why use it?
It turns scattered competitor-link data into a ranked list of possible outreach targets and broken-link opportunities.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: reads .claude/ paths.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the digital-marketing-pro plugin — 154 skills, 18 commands, 24 agents shipped together

Good fit Planning link building, running backlink audits, qualifying digital-PR prospects, and creating an initial outreach list.

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Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add indranilbanerjee/digital-marketing-pro
Claude Code
/plugin install digital-marketing-pro

Made for: Claude Code.

Or install digital-marketing-pro, the plugin that ships this one along with the rest of its 154 skills, 18 commands, 24 agents.

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 backlink-gap

README.md
[![agentmods](https://agentmods.dev/badge/skills/indranilbanerjee/digital-marketing-pro/backlink-gap/github.svg)](https://agentmods.dev/skills/indranilbanerjee/digital-marketing-pro/backlink-gap)
Your own site
<a href="https://agentmods.dev/skills/indranilbanerjee/digital-marketing-pro/backlink-gap"><img src="https://agentmods.dev/badge/skills/indranilbanerjee/digital-marketing-pro/backlink-gap/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for backlink-gap

Your own site · 80×15
<a href="https://agentmods.dev/skills/indranilbanerjee/digital-marketing-pro/backlink-gap"><img src="https://agentmods.dev/badge/skills/indranilbanerjee/digital-marketing-pro/backlink-gap.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 178 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,630 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00178 $0.02630
Opus 5 $0.00089 $0.01315
Sonnet 5 $0.00036 $0.00526
Haiku 4.5 $0.00018 $0.00263

Measured 12d ago against content hash 18a8c0e11101, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

backlink-gap 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 12d 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.

skills/backlink-gap/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

Identify the highest-leverage backlink prospects — domains that link to multiple competitors but not to you — and rank them by an opinionated priority score that combines authority, link-overlap signal, downstream traffic, and topical relevance. Produces a numbered output bundle ready for outreach handoff.

Context efficiency

Heavy skill. Grep before Read any referenced file, then Read only matched ranges with offset + limit. List ${CLAUDE_PLUGIN_DATA}/<brand>/ before opening files. On re-invocation mid-session, skip files already in context.

When to Use

  • Quarterly backlink audit — "where did our competitors grow links this quarter and we didn't?"
  • Pre-launch link-building plan for a new product or content hub
  • Digital PR qualification — separating "would-link-to-anyone" prospects from "high-confidence-will-link-to-our-space"
  • Competitive recovery — a competitor displaced you and you want to know which links moved
  • Onboarding a new client and need a "first 50 link targets" backlog

Don't use when you just need backlink quantity numbers (use the brand's connected backlink MCP directly) or when you need anchor-text analysis of your own profile (that's a separate audit — covered in seo-audit).

Brand context (auto-applied)

  1. Read ~/.claude-marketing/brands/_active-brand.json for the active slug, then load ~/.claude-marketing/brands/{slug}/profile.json
  2. If no brand exists: ask "Set up a brand first (/digital-marketing-pro:brand-setup)?" — or proceed with defaults
  3. Apply skills/context-engine/industry-profiles.md for industry-specific link-quality thresholds (YMYL industries should set higher --min-dr)
  4. Apply skills/context-engine/compliance-rules.md to filter out blocked publishers (e.g., PBN-style or paid-link networks the brand has explicitly banned)

Inputs

Input Source Required?
Our backlinks CSV Export from connected backlink MCP (Ahrefs / Semrush / SE Ranking / Moz) for the brand's primary domain yes
Competitor backlinks CSVs (2+) Same exporter, one per competitor (2 minimum for the link-overlap signal; 3-5 is the sweet spot) yes
Min DR / DA filter CLI flag, brand-profile default, or industry standard optional
Top-N count How many prospects to surface optional

Read the full file on GitHub · 150 lines

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. 12d ago First seen · 150 lines · 178 tokens per session scan A 18a8c0e11101

Subscribe to this mod's changes

backlink-gap is a skill published in the GitHub repository indranilbanerjee/digital-marketing-pro (812 stars, last pushed 5d ago), licensed MIT. It adds 178 tokens to every session and 2,630 once invoked, about $0.0009 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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