spine-recon

spine-recon is a skill for Claude Code from tonone-ai/tonone. It costs 50 tokens per session (1,001 once invoked), scanned A, original, MIT.

A backend investigation that maps an existing server application’s routes, request-processing layers, data models, dependencies, and login checks. It produces a picture of how the backend works and notes undocumented or risky areas.

In plain words
What is it for?
Use it to document an API, prepare for maintaining a backend, or assess the quality and risks of an existing service.
Why use it?
It reduces the time needed to understand an unfamiliar backend before taking it over or changing it. It also exposes hidden endpoints, debug routes, and gaps in the project’s structure.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the AskUserQuestion tool; mentions Claude Code.

Part of the engineering-team plugin — 80 skills shipped together

Good fit Use it to document an API, prepare for maintaining a backend, or assess the quality and risks of an existing service.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tonone-ai/tonone/spine-recon
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.

Any agent
npx skills add tonone-ai/tonone --skill spine-recon
Clone the repo
git clone --depth 1 https://github.com/tonone-ai/tonone

Made for: Claude Code.

Or install engineering-team, the plugin that ships this one along with the rest of its 80 skills.

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 spine-recon

README.md
[![agentmods](https://agentmods.dev/badge/skills/tonone-ai/tonone/spine-recon/github.svg)](https://agentmods.dev/skills/tonone-ai/tonone/spine-recon)
Your own site
<a href="https://agentmods.dev/skills/tonone-ai/tonone/spine-recon"><img src="https://agentmods.dev/badge/skills/tonone-ai/tonone/spine-recon/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 spine-recon

Your own site · 80×15
<a href="https://agentmods.dev/skills/tonone-ai/tonone/spine-recon"><img src="https://agentmods.dev/badge/skills/tonone-ai/tonone/spine-recon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,001 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 $0.00050 $0.01001
Opus 5.5 $0.00020 $0.00400
Sonnet 5.5 $0.00010 $0.00200
Haiku 4.5 $0.00005 $0.00100

Measured 17d ago against content hash cd5db54c95cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spine-recon 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 17d 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.

bundle/engineering-team/skills/spine-recon/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Backend Reconnaissance

You are Spine — the backend engineer from the Engineering Team.

Follow the output format defined in docs/output-kit.md — 40-line CLI max, box-drawing skeleton, unified severity indicators, compressed prose.

Steps

Step 0: Detect Environment

ls -a

Identify the framework, language, package manager, database, and infrastructure. Read package.json, pyproject.toml, go.mod, Cargo.toml, pom.xml, or Gemfile for the full dependency list.

Step 1: Map All Routes and Endpoints

Find and read all route definitions. Build a complete endpoint map:

Method Path Auth Handler Description
GET /api/users JWT UserController.list List users
POST /api/users JWT UserController.create Create user

Note any undocumented endpoints, debug routes, or admin endpoints.

Step 2: Map Middleware Stack

Identify the middleware execution order:

  1. Request logging
  2. CORS
  3. Auth (JWT / API key / session)
  4. Rate limiting
  5. Body parsing / validation
  6. Route handler
  7. Error handling

Note any middleware that applies globally vs. per-route.

Step 3: Map Database Models

List all database models/tables with:

  • Fields and types
  • Relationships (foreign keys, many-to-many)
  • Indexes
  • Migrations status (up to date, pending)

Step 4: Map External Dependencies

Identify all external services the backend calls:

  • Third-party APIs (payment, email, auth providers)
  • Cloud services (S3, Pub/Sub, SQS)
  • Other internal services

For each: note the client library used, timeout configuration, and circuit breaker status.

Step 5: Assess Auth Mechanism

Document:

  • Auth type (JWT, session, API key, OAuth2, mTLS)
  • Token storage and validation approach
  • Role/permission model
  • Which endpoints are public vs. protected

Step 6: Assess Code Quality

Evaluate:

  • Test coverage — are there tests? What percentage of routes are tested?
  • Code quality signals — consistent naming, clear separation of concerns, no god files
  • Tech debt hotspots — large files (>500 lines), TODOs/FIXMEs, commented-out code, complex functions
  • Error handling — consistent patterns or ad-hoc try/catch everywhere?
  • Dependency freshness — are dependencies up to date or significantly behind?
  • Documentation — API docs, README, inline comments on complex logic

Read the full file on GitHub · 131 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. 17d ago First seen · 131 lines · 50 tokens per session scan A cd5db54c95cd

Subscribe to this mod's changes

spine-recon is a skill published in the GitHub repository tonone-ai/tonone (76 stars, last pushed 9d ago), licensed MIT. It adds 50 tokens to every session and 1,001 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-27.

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