Canvas Config tab had 3 bugs visible on hermes workspaces (#1894):
1. Runtime dropdown showed "LangGraph (default)" even when the workspace's
actual runtime was hermes — because the form only loaded runtime from
config.yaml, and hermes doesn't use the platform's config.yaml template.
2. Model field was empty for the same reason.
3. "No config.yaml found" error appeared on hermes workspaces despite
everything being fine — hermes manages its own config at
~/.hermes/config.yaml on the workspace host.
Worse, clicking Save with the empty form would silently flip `runtime`
back from `hermes` to `LangGraph (default)`.
## Fix
- loadConfig now always fetches workspace metadata (runtime + model)
via GET /workspaces/:id and GET /workspaces/:id/model BEFORE attempting
the config.yaml fetch. These act as the source of truth for runtime
and model when config.yaml doesn't set them.
- RUNTIMES_WITH_OWN_CONFIG set lists runtimes that manage their own
config outside the platform template (hermes, external). For these:
- Missing config.yaml is NOT an error — no red banner shown.
- An informational gray banner tells the user where to edit the
runtime's config (e.g. "edit ~/.hermes/config.yaml via Terminal tab
or the hermes CLI" for hermes).
Closes#1894.
Verified 2026-04-23 on user's hongmingwang tenant which runs hermes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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