fix(skill): Insist on learn guide check in add_sensor_component_v1

Author: tyeth

.agents/skills/add_sensor_component_v1/SKILL.md

@@ -82,8 +82,9 @@ Before writing any code, gather this information:
 
 | What | Where to look |
 |------|---------------|
-| Product page | Search the web for "adafruit <SENSOR>" to find the product page. The product page links to the learn guide and Arduino library. This is the fastest route to all other info. |
-| Adafruit Arduino library | The learn guide (linked from product page) shows which library to use. Or: `gh search repos "<SENSOR>" --owner adafruit`. If no dedicated library, check related chips (e.g. TMP119 lives inside `Adafruit_TMP117`). Try partial matches like `TMP11` if exact fails. |
+| Product page | Search the web for "adafruit <SENSOR>" to find the product page. The product page links to the learn guide. This is the fastest route to all other info. |
+| Learn guide | **Always read the learn guide before writing any code.** Fetch the `.md?view=all` version (e.g. `https://learn.adafruit.com/<guide-slug>.md?view=all`). The Arduino section names the exact library to use. Do NOT skip this step even if you think you recognise a sub-component (e.g. a board with an SHT41 onboard may have its own dedicated library like `Adafruit_STCC4` — you won't know without reading the guide). |
+| Adafruit Arduino library | Named in the learn guide. Or: `gh search repos "<SENSOR>" --owner adafruit`. If no dedicated library, check related chips (e.g. TMP119 lives inside `Adafruit_TMP117`). Try partial matches like `TMP11` if exact fails. |
 | Library API | Read the library header on GitHub — find `begin()` signature and sensor read methods (`getEvent`, `readTempC`, etc.) |
 | I2C addresses | Sensor datasheet or Adafruit product page. Check https://learn.adafruit.com/i2c-addresses/the-list |
 | What it measures | Datasheet — map each reading to a subcomponent type (see table below) |