cc-crossbeam: Skill for Claude Code

.claude/skills/adu-corrections-interpreter/SKILL.md

adu-corrections-interpreter is a skill for Claude Code from mikeOnBreeze/cc-crossbeam. It costs 101 tokens per session (1,321 once invoked), scanned A, original, MIT.

A tool for reading correction letters from California building departments about permits for accessory dwelling units, also called ADUs or secondary homes. It explains the cited building rules and turns each review comment into work for the design team.

In plain words
What is it for?
Use it to examine a PDF or image of a corrections letter, extract project details and numbered comments, identify cited codes and plan sheets, and group issues by type.
Why use it?
Permit correction letters can contain technical code references, drawing references, and review history that are difficult to interpret together.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions subagents.

This is mikeOnBreeze/cc-crossbeam's own configuration. It tells Claude Code how to work on cc-crossbeam itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything cc-crossbeam configures →

Reuse

Borrowing it

Nothing to install: this file belongs to mikeOnBreeze/cc-crossbeam. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mikeOnBreeze/cc-crossbeam/main/.claude/skills/adu-corrections-interpreter/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/mikeOnBreeze/cc-crossbeam

Made for: Claude Code.

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.

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README.md
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Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,321 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 $0.00101 $0.01321
Opus 5 $0.00051 $0.00660
Sonnet 5 $0.00020 $0.00264
Haiku 4.5 $0.00010 $0.00132

Measured 11d ago against content hash a5974f72f573, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

adu-corrections-interpreter 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 11d 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.

.claude/skills/adu-corrections-interpreter/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ADU Corrections Interpreter

Overview

Interpret ADU permit corrections letters by reading the letter, identifying each correction item, researching the referenced building codes and city-specific requirements, and producing an actionable breakdown the contractor can hand to their design team.

Workflow

Phase 1: Read the Corrections Letter

Read the corrections letter using vision capabilities. The letter will typically be 1-3 pages of typed text, provided as PNG images or a PDF.

Extract from the letter:

  • Project info: address, jurisdiction number, job description, date, reviewer name/contact
  • Each numbered correction item, noting:
    • The correction comment text
    • Any code references (e.g., CRC R302.1, ASCE 7-16 §30.11, CBC Chapter 7A)
    • Any plan sheet references (e.g., "Sheet S1", "Detail 2/A3", "Calc Sheet 3 of 37")
    • Whether it is a 1st review (outstanding) or 2nd review (new) comment
    • Whether it is bold/emphasized (indicates new or escalated concern)

Phase 2: Categorize the Corrections

Group each correction into one of these categories:

  1. Administrative / Plan Formatting — stamps, signatures, sheet index, governing codes on cover sheet, labeling (e.g., "For Reference Only"). These are drafter fixes, no engineering required.

  2. Utility Connections — sewer, water, gas, electrical. Typically requires showing connection details per city standard details and justifying pipe/meter sizing.

  3. Structural / Engineering — calculations, load paths, wind loads, seismic, bracing details. Requires a structural engineer to update calcs and provide details.

  4. Fire & Life Safety — fire separation distance, fire-rated assemblies, property line setbacks. Requires showing code-compliant details on plans.

  5. Site / Grading / Drainage — drainage slopes, grading plans, site conditions. Requires showing slopes and directions on site plan.

  6. Plan Consistency — elevation views not matching roof plan, details not matching conditions. Requires the drafter/architect to reconcile drawings.

Read the full file on GitHub · 102 lines

Files

What ships with it

1 file 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.

  1. 11d ago First seen · 102 lines · 101 tokens per session scan A a5974f72f573

Subscribe to this mod's changes

adu-corrections-interpreter is a skill published in the GitHub repository mikeOnBreeze/cc-crossbeam (291 stars, last pushed 6mo ago), licensed MIT. It adds 101 tokens to every session and 1,321 once invoked, about $0.0005 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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