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HealthLog/src/lib/mcp
Marc-André Bombeck bec4cb3dfb fix(mcp): let five of the six shipped languages name a metric
Three resolvers turned a user-authored word into an internal code by
comparing it against a hand-typed English list. The app ships six
languages, so five of them resolved nothing: `Fer` and `Żelazo` came back
as `unknown_nutrient` while the settings card rendered exactly those
words, and `poids` and `sommeil` reached no series at all.

Stop transcribing. `nutrients.names.*` and `measurements.type*` already
label these concepts in every bundle, so the match index is derived from
`locales` instead — a seventh language works the day its bundle lands,
with no edit at any call site. The nutrient tool's English labels now come
out of `messages/en.json` too, so the wire wording cannot drift from the
screen.

The MCP contract is unchanged in shape and stays protocol-level English.
What moves is which words are understood: `unknown_nutrient` /
`unknown_metric` still mean "could not place this word", distinct from a
placed name answering `no_data`. Nothing turns absence into data.

Two findings the sweep did not predict:

- `Puls` resolved to pulse-wave velocity, because the English
  display-name pass matches substrings and "pulse-wave velocity" contains
  it. An exact name now beats a loose English fragment.
- French and Italian use one phrase for body fat and fat mass, and three
  bundles use one for fat-free mass and lean body mass. A word two
  metrics claim resolves to neither; answering kilograms to someone who
  asked for a percentage is worse than saying the word was not
  recognised. The known set is pinned so a new collision surfaces.

The medication needles are the exception: they are drug names, with no
bundle to derive from. They fold to a normalised INN stem rather than to
a language, so `Metformin`, `Metformine`, `Metformina` and `Metforminum`
are one entry, and `Semaglutyd` and `Atorwastatyna` cost nothing to add.
A guard asserts no two molecules collapse onto one stem. Iron is the one
class with no stem to fold to — it is named for the element — so its word
list is hand-tabulated and says so.

Every English resolution that worked before returns the same answer.
2026-08-23 14:46:10 +02:00
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