Earlier this month I switched from Claude Code to Codex and wanted to try Gemini CLI as well.
It felt far behind both CC and Codex but I wanted to give it another chance with the new Antigravity CLI.
What can I say, it did surprise me and not in a good way in but two short sessions that included just two prompts (trying to reverse engineer some earbuds OTA firmware) using Gemini Flash 3.5, I managed to finish my weekly quota. I'm currently on the Google AI Pro subscription. Couldn't even figure out my tokens usage or if my plan is even counted toward usage inside Antigravity CLI.
Given how the cache eviction policy is mismatched with the 5h usage window, it might make sense to just stop at say 97% of the session max usage and keep running a script every 4 min and 50 sec that consumes a minimal number of tokens whose entire purpose is to keep the cache.
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Neither RAG nor loading the docs into the context window would produce any effective results. Not even including the grammar files and just few examples in the training set would help. To get any usable results you still need many many usage examples.
My own 100% hallucinated language experiment is very very weird and still has thousands of lines of generated examples that work fine. When doing complex stuff you could see the agent bounce against the tests here and there, but never produced non-working code in the end. The only examples available were those it had generated itself as it made up the language.
It was capable of making things like a JSON parser/encoder, a TODO webapp or a command line kanban tracker for itself in one shot.
And yet it works well enough, regardless. I have a little project which defines a new DSL. The only documentation or examples which exist for this little language, anywhere in the world, are on my laptop. There is certainly nothing in any AI's training data about it. And yet: codex has no trouble reading my repo, understanding how my DSL works, and generating code written in this novel language.
If you want to section hike it, its entire North American part is covered by the Eastern Continental Trail (ECT), which some people (very few, as in a tiny fraction of all A.T. thruhikers) thruhike it in a single calendar year.
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