I've been happily running the default CodeQL action (well, mostly, I have to kick off the compile stage myself) for ages now.
Warning: Unexpected input(s) 'languages', valid inputs are ['check_name', 'output', 'upload', 'cleanup-level', 'ram', 'add-snippets', 'skip-queries', 'threads', 'checkout_path', 'ref', 'sha', 'category', 'upload-database', 'post-processed-sarif-path', 'wait-for-processing', 'token', 'matrix', 'expect-error']
Run github/codeql-action/analyze@fdbfb4d2750291e159f0156def62b853c2798ca2
Error: Config file could not be found at expected location. Has the 'init' action been called?