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Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Reference Feature flags
One name

tengu_sdk_session_crash

A Claude Code feature flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Familyfeature flagFeature flags
Builds0of the 122 on this box
First seen — never in a mined build
Last seen — never in a mined build
Statusnever minedas of v2.1.278

What it is

SDK session crash telemetry now logs the actual error that caused the crash

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.267.

Presence across releases

0

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

First cited

1

The earliest release whose published evidence quoted tengu_sdk_session_crash was v2.1.267, 9 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table above.

ReleaseDateThe span that was quoted
v2.1.2679 Sep 2026if ((i("tengu_sdk_session_crash", lp(G)), !Ar))

Gate readings

0

No release here has a gate table behind it for this flag. Most published releases have none at all: the readings exist only for versions the pipeline captured flag state on.

Names beside it

Every feature flag in the inventory starting tengu_sdk, up to twelve of them.

tengu_sdk_malformed_inputOdd or damaged input frames on remote connections are now fixed up or quietly dropped instead of erroring out. never mined tengu_sdk_mcp_manifestsSDK-registered in-process MCP servers can now skip a round-trip handshake at session start v2.1.265 tengu_sdk_memory_summarySDK memory usage sampling for child processes now runs asynchronously and in parallel never mined tengu_sdk_oauth_refresh_unfulfilledAn SDK host can now refuse to refresh your login token and say why. never mined tengu_sdk_resultSDK session-result telemetry now includes the user message id being processed at session end. never mined tengu_sdk_workspace_trustSDK/host initialize can now grant directory trust programmatically via a validated workspaceTrust option never mined

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the feature flag does. All feature flags.