A codebase analysis workflow that measures how files change together, depend on one another, and resemble one another to reveal structural weaknesses.

Use it before refactoring or making architecture decisions, or afterward to check whether boundaries improved. It can produce a report or update individual analysis stages.

It replaces guesses about architecture with evidence about tightly connected areas, leaking boundaries, risky code, and changes over time.

archobs — Skill for Claude Code by bricerising

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 bricerising/enterprise-software-playbook --skill archobs

Clone the repo

git clone --depth 1 https://github.com/bricerising/enterprise-software-playbook

Made for: Claude Code.

Or install enterprise-software-playbook, the plugin that ships this one along with the rest of its 16 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/bricerising/enterprise-software-playbook/archobs/github.svg)](https://agentmods.dev/skills/bricerising/enterprise-software-playbook/archobs)

Your own site

<a href="https://agentmods.dev/skills/bricerising/enterprise-software-playbook/archobs"><img src="https://agentmods.dev/badge/skills/bricerising/enterprise-software-playbook/archobs/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/bricerising/enterprise-software-playbook/archobs"><img src="https://agentmods.dev/badge/skills/bricerising/enterprise-software-playbook/archobs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 94 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,705 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 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.

Model	Per session	Once invoked
Fable 5.1	$0.00094	$0.04705
Opus 5.5	$0.00038	$0.01882
Sonnet 5.5	$0.00019	$0.00941
Haiku 4.5	$0.00009	$0.00470

Measured 1mo ago against content hash 121dd955b09e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

archobs scanned grade C with 2 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 1mo 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

- Install codanna: `brew install codanna` (macOS) or `curl -fsSL --proto '=https' --tlsv1.2 https://install.codanna.sh | sh` (Linux)

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- Install codanna: `brew install codanna` (macOS) or `curl -fsSL --proto '=https' --tlsv1.2 https://install.codanna.sh | sh` (Linux)

skills/archobs/SKILL.md · 313 lines

How it starts

The opening of the file, as written. The whole thing — 313 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Archobs (Architecture Observability)

Overview

Measure the actual coupling structure of a codebase using three signals: git co-change history, import/dependency edges, and semantic similarity. These signals are fused into a weighted graph, clustered into logical subsystems, and scored for boundary health, risk, and temporal stability.

Use this skill to ground architecture and refactoring decisions in empirical data rather than intuition. The output feeds directly into architecture, design, plan, and review as evidence.

Success looks like: numbered risk hotspots, measured boundary leakage, and prioritized suggestions with concrete scope.

Chooser (Analysis Mode)

Full report (default): Run the complete pipeline and generate an HTML report with suggestions. Use for initial analysis or periodic health checks.
Targeted stage: Run a single pipeline stage (inventory, git, deps, embed, build-graph, cluster) when you only need one artifact updated.
Suggestion loop: Run analysis, apply one suggestion, re-analyze, repeat until convergence. Use for automated refactoring passes.
Regression check: Compare current metrics against a previous run. Use in finish to verify architecture health did not degrade.

Inputs / Outputs

Inputs: Git repository path with history. Outputs: JSON artifacts — file risk scores (xnbr, hubness, volatility), cluster health (leakage, cohesion, conductance), drift data (ARI, modularity), velocity metrics, team analysis, suggestions. Consumed by architecture, design, plan, review, finish, forecast.

Workflow

Check prerequisites:
- Install codanna: brew install codanna (macOS) or curl -fsSL --proto '=https' --tlsv1.2 https://install.codanna.sh | sh (Linux)
- Install archobs from the bundled tool: pip install -e 'tools/archobs[full]'
- Verify the target repo has git history (git log must succeed)
Initialize workspace (first run only):
```
archobs init --repo <path> --out .archobs
```
Skip if running report directly — it initializes the workspace automatically. Only run init separately if you need to edit config.json before the first analysis.

Read the full file on GitHub · 313 lines

Files

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.

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.

1mo ago First seen · 313 lines · 94 tokens per session scan C 121dd955b09e

Subscribe to this mod's changes

archobs is a skill published in the GitHub repository bricerising/enterprise-software-playbook (8 stars, last pushed 7d ago), licensed Apache-2.0. It adds 94 tokens to every session and 4,705 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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