docs: note html2text→markdownify swap in CHANGELOG and skill files

- CHANGELOG: add Unreleased entry documenting the license-motivated swap
- skill.md (both copies): update user-facing description from
  'converted to markdown via html2text' to '...via markdownify'

Author: mrummuka

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## Unreleased
+
+### Changed
+- Replace `html2text` (GPL-3.0) with `markdownify` (MIT) for HTML→Markdown
+  conversion in URL ingestion. Aligns the `pdf`/`all` extras with the
+  project's MIT license and removes a copyleft dependency that affected
+  anyone redistributing or embedding graphify. Fallback regex-strip path
+  unchanged.
+
 ## 0.1.8 (2026-04-05)
 
 - Fix: follow-up questions now check for wiki first (graphify-out/wiki/index.md) before falling back to graph.json

graphify/skill.md

@@ -1138,7 +1138,7 @@ Supported URL types (auto-detected):
 - arXiv → abstract + metadata saved as `.md`  
 - PDF → downloaded as `.pdf`
 - Images (.png/.jpg/.webp) → downloaded, Claude vision extracts on next run
-- Any webpage → converted to markdown via html2text
+- Any webpage → converted to markdown via markdownify
 
 ---
 

skills/graphify/skill.md

@@ -1138,7 +1138,7 @@ Supported URL types (auto-detected):
 - arXiv → abstract + metadata saved as `.md`  
 - PDF → downloaded as `.pdf`
 - Images (.png/.jpg/.webp) → downloaded, Claude vision extracts on next run
-- Any webpage → converted to markdown via html2text
+- Any webpage → converted to markdown via markdownify
 
 ---