CAIN-42 · announcement · October 2026

CAIN-42 checks its own code every 42 seconds.

Day and night, every 42 seconds, CAIN-42 turns its own tools on itself: it looks at every file of its codebase, re-scans anything that changed for code that fakes a result, and publishes the check, chained to the one before it. You are watching it happen. Run the live tools ↓

Connecting to the live self-check…

—checks run so far

—since the last check

—until the next check (about)

—files looked at on every check

Live tools · no account needed

Don’t take our word for it. Run it.

Four live tools on production routes. Each shows exactly what the server returned.

1 · Re-verify the 42-second chain in your browser

Downloads the latest 120 checks and recomputes every SHA-256 hash and link on your own machine, then measures the real interval between checks.

2 · Run FALSEWORK on your own code

The detector behind the 42-second check. Pick a sample or paste any Python; FALSEWORK reports code that fakes a result. Nothing you paste is executed.

3 · KEYSTONE’s signed fixes

Every KEYSTONE run is a signed record: what FALSEWORK found, what the AI changed, whether an independent test failed on the old code and passed on the new, and the Ed25519 signature. Open one and re-verify it live.

Loading the signed ledger…

4 · The campaign on CAIN-42’s own code

FALSEWORK and KEYSTONE pointed at CAIN-42 itself: the proved fixes that went into the repository, and every finding, searchable.

All the evidence, across CAIN-42

FALSEWORK × KEYSTONE on CAIN-42 itselfThe full results table on the homepage, refreshed live.KEYSTONE: find the fake, fix it, prove the fixRun the five-stage loop on curated samples.MCPGate KEYSTONEThe same proof loop for MCP tool servers.VeriCoding KEYSTONEFormal verification closes the loop.MCP-AttestorSigned attestations for MCP servers.FALSEWORK product pageThe detector behind the 42-second check.Signed evidence bundleEvery finding, every KEYSTONE record, signed.Offline verifierRecomputes every number in the bundle with no CAIN code.Signed manifestThe Ed25519 signature over the bundle.First chained checksThe first run of the self-check, one line per check.Live status JSONCheck number, grades and chain head, rewritten every 42 s.Latest 120 chained checksWhat tool 1 re-verifies in your browser.KEYSTONE ledger statsVerdicts, fixes and models across the signed ledger.KEYSTONE ledger verificationEvery record re-checked against the pinned key.KEYSTONE pinned public keyThe Ed25519 key every record is signed with.Verification CenterEverything about CAIN-42 you can check yourself.LabCrash nodes on a live PBFT sandbox and verify the result.ChangelogEvery change, dated, including this one.Top 100The products, each with a live demo on its card.llms.txtThe same facts, for AI agents and crawlers.

What happens every 42 seconds

A timer on the CAIN-42 host wakes FALSEWORK, CAIN-42’s detector for code that fakes a result.
FALSEWORK looks at every Python file of CAIN-42 and re-scans the ones that changed: results typed in instead of computed, verdicts returned without a check, errors silently swallowed, leftover placeholders.
Each file is graded REAL, PARTIAL or STUB, and the totals are published at once.
The check’s record is SHA-256 chained to the one before it, so a skipped or edited check shows.

When FALSEWORK flags something, KEYSTONE takes over: an AI proposes a fix, and the fix is applied only once sandboxed tests fail on the old code and pass on the new.

Check it yourself

The live status is a public file. Fetch it twice, 42 seconds apart, and watch the check number move:

curl -s https://cainstudio.online/evidence/keystone-codebase-scan-live.json

Running since — · current chain head —

The signed record of the first full run, with every check in order and an offline verifier that recomputes every number, is at /evidence/keystone-codebase-scan-2026-10-15/. Full results: cainstudio.online/#codebase-scan.

Tell someone

If a codebase can prove it is checked every 42 seconds, yours can be too. Share this page:

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