Add Chatham House Rule semantic anchor

[Copilot]

Adds the Chatham House Rule as a communication semantic anchor. Established 1927 by the Royal Institute of International Affairs, this protocol enables frank discussion by allowing information sharing without speaker attribution.

Files Added

• docs/anchors/chatham-house-rule.adoc (English)
• docs/anchors/chatham-house-rule.de.adoc (German)

Metadata

• Category: communication-presentation
• Roles: team-lead, consultant, business-analyst, product-owner
• Proponents: Chatham House (Royal Institute of International Affairs)

Structure

Follows standard anchor format with core concepts, historical context, use cases, and common misunderstandings:

= Chatham House Rule
:categories: communication-presentation
:roles: team-lead, consultant, business-analyst, product-owner
:proponents: Chatham House (Royal Institute of International Affairs)
:tags: communication, confidentiality, meetings, open-discussion, trust

[%collapsible]
====
Full Name:: Chatham House Rule

*Core Concepts*:

Information Sharing:: Participants are free to use information received, 
but neither the identity nor the affiliation of the speaker(s) may be revealed
...
====

Metadata extraction updated website JSON files. Anchor now available for filtering and search.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• www.chathamhouse.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[Anchor Proposal]: Chatham House Rule</issue_title>
<issue_description>### Proposed Term

Chatham House Rule

Context (Optional)

No response

Pre-submission Checklist

• I have searched existing anchors and this term is not already included
• This term refers to a well-established concept (not something I invented)</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [Anchor Proposal]: Chatham House Rule #101

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