* feat(skills/linear): add Documents support + Python helper script
The bundled Linear skill (PR #1230) covered issues, projects, teams, and
workflow states via curl. It had no coverage for Linear's Documents API,
so fetching an RFC/doc from a linear.app URL required hand-writing
GraphQL against an underdocumented schema.
Adds:
- Documents section in SKILL.md explaining slugId extraction from URLs,
the contentState (markdown) vs contentState (ProseMirror) split, and
four canonical curl examples (fetch by slugId, fetch by UUID, list
recent, title-search).
- scripts/linear_api.py — stdlib-only Python CLI wrapping the most
common operations (whoami, list-teams, list/get/search/create/update
issues, add-comment, update-status, list/get/search documents, raw
GraphQL passthrough). Zero deps, reads LINEAR_API_KEY from env.
Auth header quirk (personal key takes bare $LINEAR_API_KEY, no Bearer
prefix) is already documented in the skill.
Found during RFC review: the existing skill's lack of document support
forced falling back to the browser (which hit Linear's login wall).
Also fixes a schema gotcha — the Document field is `contentState`, not
`contentData` (which returns 400).
Tested end-to-end against the production API:
python3 linear_api.py whoami
python3 linear_api.py get-document 38359beef67c
Both return expected payloads.
* fix(skills/linear): point LINEAR_API_KEY setup to the correct page
The org-level Settings > API page (/settings/api) only shows OAuth apps
and workspace-member keys. Personal API keys live under Account,
Security, access (/settings/account/security). Update both the setup
link in config.py (shown during hermes setup) and the setup step in
SKILL.md so users land on the page that can create a personal key.
