Sec Opinion Letter

Q: What is a Claude Code skill and how does the Sec Opinion Letter skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Sec Opinion Letter is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: general-misc · Last updated: 2026-06-06

Drafts Opinion of Counsel letters for SEC registration statements, covering due incorporation, valid issuance, fully-paid and non-assessable opinions, and Reg S-K Item 601(b)(5) consent language. Use when drafting Exhibit 5.1 opinions for S-1/S-3 filings, shelf offerings, or securities issuance transactions.

About this skill (catalog notes)

Sec Opinion Letter includes a dedicated installation section. The SKILL.md runs to about 1,068 words, in the catalog's typical mid-range.

License: Apache-2.0
Original author: CaseMark
Indexed lastmod: 2026-06-06
Catalog position: General · general-misc
Indexed related skills: 10

How Sec Opinion Letter fits the catalog

Sec Opinion Letter sits in the General category under the general-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Drafts a formal legal opinion letter for an SEC registration statement, providing counsel's assurances on corporate status, authorization, and securities validity per ABA Legal Opinion Accord standards.

What this skill does

Sec Opinion Letter is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/sec-opinion-letter/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when drafting Exhibit 5.1 opinions for S-1/S-3 filings, shelf offerings, or securities issuance transactions.

Who uses this skill

The Sec Opinion Letter Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 93,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/sec-opinion-letter
curl -L https://claudskills.com/skills/sec-opinion-letter/SKILL.md \
  -o ~/.claude/skills/sec-opinion-letter/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/sec-opinion-letter/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/sec-opinion-letter/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\sec-opinion-letter\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Sec Opinion Letter Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/sec-opinion-letter/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Sec Opinion Letter skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Sec Opinion Letter skill?

Use Sec Opinion Letter when your Claude Code task falls under the General category — specifically in the general misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Sec Opinion Letter" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Sec Opinion Letter skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Sec Opinion Letter is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/ThomasMoreAI/legal-skills-open/blob/HEAD/us/securities/skills/sec-opinion-letter/SKILL.md
License: Apache-2.0
Author: CaseMark

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

CaseMark. (2026). Sec Opinion Letter [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/sec-opinion-letter/

BibTeX

@misc{sec-opinion-letter-2026,
  author    = {CaseMark},
  title     = {Sec Opinion Letter [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/sec-opinion-letter/}
}

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