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b2o2i edited this page May 10, 2026 · 4 revisions

FAQ — Cross Frequently Asked Questions


Setup & configuration

How do I run first-time setup?

pipx install cross-st        # or: pip install cross-st
st-admin --setup             # interactive wizard

--setup walks you through:

  • Checking Python version and Homebrew (macOS)
  • Entering API keys for each provider you want to use
  • Setting your default AI provider (DEFAULT_AGENT)
  • Setting your editor and TTS voice (optional)
  • Optionally joining the crossai.dev community

All settings are written to ~/.crossenv. Run st-admin --show at any time to see the current configuration.

I skipped the Discourse step during --setup. How do I add it later?

st-admin --discourse-setup

This runs the full Discourse onboarding independently: accepts the Terms of Service, opens the crossai.dev signup page, provisions your account, and writes the required keys to ~/.crossenv. You do not need to re-run --setup.

How do I change which Discourse category st-post uses by default?

st-admin --discourse

This opens an interactive manager showing your current site, username, and default posting category. You can switch between:

  1. Your private category (created during onboarding — visible only to you)
  2. Test (cleared daily) — a public sandbox on crossai.dev; all posts are automatically deleted at 00:05 UTC every night. Safe for testing st-post.
  3. Any other category ID (enter manually)

The change takes effect immediately for the next st-post call.

First-run note: If --discourse-setup completed but st-post still fails, run st-admin --discourse once. It will automatically migrate the flat DISCOURSE_* keys to the DISCOURSE JSON format that st-post needs.

How do I change my default AI provider?

Quick one-liner:

st-admin --set-default-ai gemini      # or: xai  anthropic  openai  perplexity

Or run the full interactive menu:

st-admin

and choose Default AI. The setting is written as DEFAULT_AGENT=gemini in ~/.crossenv. You can also edit ~/.crossenv directly in any text editor.

Available providers:

Provider Key variable Free tier?
gemini GEMINI_API_KEY ✅ Yes — aistudio.google.com
xai XAI_API_KEY Free credits on signup
anthropic ANTHROPIC_API_KEY Paid only
openai OPENAI_API_KEY Paid only
perplexity PERPLEXITY_API_KEY Paid only

Cache

What is the cache and why do I want it?

Every time Cross calls an AI, the response is saved to ~/.cross_api_cache/ using an MD5 key derived from the exact prompt and model. On the next run with the same prompt and model, Cross returns the saved response instantly — no API call, no cost, no wait.

Why this matters:

  • st-cross runs up to 25 AI calls for a single topic (5 providers × 5 fact-checks). Without the cache, re-running any step re-bills every one of those calls.
  • Iterating on st-fix or st-prep options is free once the story is cached.
  • The cache is transparent — you never need to manage it to get the benefit.

To bypass the cache (force a fresh API call):

st-gen --no-cache my_topic.json
st-fact --no-cache my_topic.json

To disable caching globally, add to ~/.crossenv:

CROSS_NO_CACHE=1

How do I see how much space the cache is using?

st-admin --cache-info

Prints the cache path, number of files, and total size.

How do I clear the cache?

st-admin --cache-clear          # delete all cached responses
st-admin --cache-cull 30        # delete entries older than 30 days

The cache at ~/.cross_api_cache/ is safe to delete at any time — Cross will simply re-call the API on the next run. Your story files (.json containers) are not affected.


Upgrades

Is st-upgrade safe? Will I lose my data?

Short answer: yes, completely safe.

st-admin --upgrade upgrades the Cross software only. It does not touch any of your data or configuration:

Location Contains Touched by --upgrade?
~/.crossenv API keys, DEFAULT_AGENT, preferences ❌ Never
~/.cross_api_cache/ Cached AI responses ❌ Never
~/.cross_templates/ Prompt templates ❌ Never
~/cross-stones/ Benchmark domain prompts ❌ Never
Your .json story files Stories, fact-checks ❌ Never

The upgrade only replaces the Python package (cross-st and cross-ai-core). After upgrading, all your API keys, stories, benchmarks, and cached responses are exactly where you left them.

What --upgrade does:

  • Detects whether you installed with pipx or pip and uses the right command
  • Skips the PyPI step if you're on an editable (developer) install
  • On macOS, also runs brew upgrade for tracked Homebrew tools (e.g. piper-tts)
  • Prints the version before and after so you can confirm the upgrade succeeded

If anything looks wrong after an upgrade, your config is in ~/.crossenv and is always readable/editable in a plain text editor.


Data & file locations

Where does Cross store user data?

Path Contents
~/.crossenv API keys, DEFAULT_AGENT, CROSS_STONES_DIR, and other preferences
~/.cross_api_cache/ MD5-keyed AI response cache (safe to delete at any time)
~/.cross_templates/ Prompt templates used by st-new
~/cross-stones/ Benchmark domain .prompt files (default; override with CROSS_STONES_DIR)

How do I move my ~/cross-stones/ directory?

Move the directory, then set CROSS_STONES_DIR in ~/.crossenv:

mv ~/cross-stones ~/research/my-benchmarks

Open ~/.crossenv in any editor and add:

CROSS_STONES_DIR=~/research/my-benchmarks

st-stones will find the new location automatically. Run st-admin --show to confirm the active path is correct.


Providers & API keys

Which AI provider is free?

Google Gemini is the only provider with a genuinely free API tier — no credit card required, just a Google account. Get a key at https://aistudio.google.com/app/apikey.

Run st-admin --setup to enter your keys and set a default provider.


Uninstalling

How do I completely uninstall Cross?

Step 1 — Remove the package

pipx uninstall cross-st        # if installed with pipx (recommended)
pip uninstall cross-st         # if installed with pip

Step 2 — Remove user data

Cross stores data in four locations under your home directory. Remove whichever you want to clean up:

rm -f  ~/.crossenv                 # API keys, DEFAULT_AGENT, all preferences
rm -rf ~/.cross_api_cache/         # cached AI responses (safe to delete any time)
rm -rf ~/.cross_templates/         # prompt templates seeded by st-admin
rm -rf ~/cross-stones/             # benchmark domain prompts (if you ran st-stones)

If you moved your benchmark directory with CROSS_STONES_DIR, remove that path instead of ~/cross-stones/.

One-liner to remove everything at once:

rm -f ~/.crossenv && rm -rf ~/.cross_api_cache/ ~/.cross_templates/ ~/cross-stones/

Your .json story files are not touched — they live wherever you created them (your working directory) and are never stored in the home-directory paths above. Keep or delete them as you choose.


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