Ultra audit: break EGC on Anthropic Fable or Mistral

[Fmarzochi]

The challenge

#987 is already paying off: @aryamirani ran a full source audit and found 3 real bugs, now merged in #989. I want that same ultra-deep audit on the two models we still have not seen covered: Anthropic Fable and Mistral.

If you run your agent on Fable or Mistral, this one is for you. Clone EGC, run it from source, and dissect the whole runtime end to end: every promise in the README, the Guardian, the Token Crusher, the persistent memory, every provider path. Push it until something cracks and tell me exactly where it bleeds.

This is the ultra tier: I want the deepest audit you can do, not a smoke test. Read the code line by line like @aryamirani did.

Get the debug build

Audit the current release, v1.1.18. It carries the full production-hardening batch (installer honesty, the Guardian read/write separation, the Token Crusher nested-JSON compressor, self-contained MCP builds), so a stale checkout will send you chasing bugs that are already closed.

Fresh clone:

git clone https://github.com/Fmarzochi/EGC
cd EGC
sh scripts/install.sh
egc doctor

Already cloned EGC from an earlier run? Rebase onto the current release before you start, so you are auditing v1.1.18 and not an old tree:

cd EGC
git pull --rebase
sh scripts/install.sh
egc doctor

Ground rules

• Run it on Anthropic Fable or Mistral and tell me which one (and the exact model id) in your report. That is the whole point of this issue.
• Real bugs get credited and go straight into the Hall of Fame.
• Security vulnerabilities: do NOT post them here. Use the private channel: https://github.com/Fmarzochi/EGC/security/advisories/new (or email fmarzochi@gmail.com). You are still credited, and the details stay private.

Break it on Fable or Mistral. Show me what those models catch that the others did not.

[AlexandrStarDev]

Hi Fmarzochi, Very interesting. Please assign me.

[Fmarzochi]

Hi @AlexandrStarDev, thanks for jumping in, glad this one caught your eye.

Before I assign it, a quick heads-up, because #990 is a specific task and not a general "grab it and go" issue: the entire point here is the model you run EGC on. This one only counts if your agent runs on Anthropic Fable or Mistral. After @aryamirani's deep audit in #989, those two are the only paths I still have not seen stressed, so that is the whole target.

Two things before assignment:

1. Tell me which one you will run, Fable or Mistral, and the exact model id (e.g. mistral-large-2407). If you are not on either of those, this specific issue is not the right fit and I will point you to a better one.
2. Take the same route @aryamirani did in Break EGC on purpose: debug the whole runtime, every provider, every promise #987 to fix: 3 runtime bugs found during issue #987 deep audit #989: git clone, sh scripts/install.sh, egc doctor, then read the runtime and actually run it, line by line. This is the ultra tier, a real audit, not a smoke test.

Once you confirm the model, the issue is yours. Whoever brings back the real audit gets credited in the EGC Hall of Fame, our public wall of contributors: https://fmarzochi.github.io/EGCSite/contributors/

New here or unsure about anything? Hop into the EGC Discord and I will walk you through it: https://discord.gg/TxppsGb52

Show me what Fable or Mistral catches that the others missed.

[relda88]

The workaround in #142 works short-term but I think the real fix needs to happen at the connection pool level.

[Fmarzochi]

Hey @relda88, thanks for stopping by! Quick question though: did this maybe land on the wrong tab? #142 here on EGC is about observation compression (shipped a while back), and this thread is about auditing EGC on the Fable/Mistral runtimes, neither really involves a connection pool. If you meant to comment on a different project's issue, no worries at all, just wanted to flag it in case that comment was meant for someone else. Happy to help if you did mean this one, just let me know what you had in mind.