Anthropic★ 4.3

Internal Comms

Anthropic's official Skill for internal communications: announcements, updates, all-hands notes, change comms.

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A+

Safety & Trust

Delv Safety Grade: A+

Score 94/100 · assessed 2026-04-18

Maintainer95

Permissions98

Supply chain90

Transparency92

Incidents100

This is Anthropic's official Skill for drafting internal communications like announcements, all-hands notes, and change management messaging. As a prompt-based Skill rather than executable code, it carries minimal technical risk—it simply teaches Claude genre conventions for internal comms writing. The maintainer is Anthropic itself, providing strong organisational backing. The Skill requires no filesystem access, no network calls, no environment variables, and no external integrations. It operates purely within Claude's text generation context. Supply chain is clean via the official Anthropic skills repository on GitHub. Transparency is excellent with open source code and clear documentation. The only consideration is that output quality depends on the user providing accurate context, but there are no security or supply chain concerns. This is as safe as a writing template can be.

Green flags

Official Anthropic Skill with direct vendor support
Zero executable code, purely prompt-based guidance
No filesystem, network, or environment variable access required
Open source in official Anthropic skills repository
No external dependencies or supply chain complexity

Red flags

Output quality relies entirely on user-provided context accuracy
No built-in fact-checking for sensitive org announcements

Assessed by Delv Editorial using public metadata. Grades are advisory and update as the ecosystem changes. They do not replace your own review of permissions and code before granting an agent access to sensitive systems.

Internal Comms is Anthropic's official Skill for teaching Claude the conventions of workplace announcements, leadership updates, and change communications. It handles the structural patterns that separate good internal writing from generic business prose: how to open with context, when to acknowledge uncertainty, how to close with clear next steps. The Skill includes templates for common scenarios (org changes, policy rollouts, weekly digests) and understands the tonal balance between transparency and professionalism. It's designed for companies with formal communication needs, not startups that live in Slack threads. You provide the substance (what's changing, why it matters, what happens next) and the Skill shapes it into something your team will actually read. Works best when you already know what you need to say but want Claude to handle the structure and tone.

Review

I've written enough "please welcome our new VP of synergy" emails to know that internal comms is a specific craft. This Skill teaches Claude the genre conventions: how to balance transparency with tact, when to front-load the why, how to structure a change announcement so it doesn't read like a press release. Without it, Claude defaults to generic business prose that sounds like it came from a template farm. With it, you get drafts that actually respect the reader's time. The real test was a restructure announcement. I fed the Skill the exec's bullet points ("consolidating teams, no redundancies, effective Q2") and it returned a draft that acknowledged the uncertainty, explained the reasoning without jargon, and included a timeline. It wasn't perfect, I still rewrote the opening, but it gave me a structure I could work with instead of a blank page. The weekly update use case is less impressive: it's just summarising with a house style, which Claude can do without prompting if you give it examples. The templates feature is useful if you're building a comms function from scratch. It'll generate frameworks for different scenarios (leadership changes, policy updates, incident comms) with placeholder guidance. I wouldn't use these verbatim, they're too generic, but they're a decent starting point if you don't already have a library. Rough edges: it assumes a certain company size and formality. If you're a 12-person startup, the tone will feel over-engineered. And it doesn't help with the hardest part of internal comms, which is deciding what to say in the first place. It's a writing aid, not a strategy tool. You still need to know your audience and have something worth communicating.

Verdict

Load this if you're writing regular internal updates for a team larger than 30 people and you want Claude to understand the genre. Overkill if you're just summarising meeting notes or your company culture is Slack-casual.

Good at

Understands the genre conventions of internal comms, not just business writing
Generates reusable templates for common scenarios (restructures, policy changes, leadership updates)
Balances transparency with tact better than raw Claude
Front-loads context and next steps instead of burying them
Official Anthropic Skill, maintained and documented

Watch out

Assumes medium-to-large company formality, feels over-engineered for small teams
Templates are generic starting points, not production-ready
Doesn't help with the hard part: deciding what to communicate
Weekly update use case is just summarising with house style
No guidance on sensitive topics like redundancies or performance issues

Use cases

Drafting an org-wide change announcement
Producing a weekly leadership update
Writing reusable comms templates
Translating exec intent into people-friendly notes