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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.219 24 Jul 2026

Live-session discovery sanity-checks timestamps

Under the hood

Useful2 Signal0

Sessions

Corrupt timestamps in session files can no longer confuse which sessions look live.

What

Epoch timestamps read from session sidecar files are now validated before use, so a corrupt or garbage value cannot skew live-session discovery.

Details

The peer-session module exports a new isSaneEpochMs predicate and a MAX_SANE_EPOCH_MS constant set to 4000000000000000.
Non-finite, negative and absurdly large epoch values are discarded rather than passed through.
Not gated; active for everyone.

Evidence

MAX_SANE_EPOCH_MS

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.219 →