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Security: isolate Discord conversations per user #492

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nsaspy commented 2026-09-08 02:20:11 +00:00
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Fixes #29 and advances #26.

  • starts with a deterministic RED contract proving two users in one guild/channel or DM must receive distinct Zara conversation IDs
  • conversation IDs now contain numeric Discord guild/channel/user IDs only; no usernames/display names
  • applies the same isolation to message routing and /zara ask
  • rejects malformed non-integer identifiers instead of silently stringifying identity input
  • documents the transcript-isolation boundary
  • bumps zara-discord to 0.2.1 in runtime metadata, discovery metadata, and plugins.json

Security property: bounded in-memory transcript history can no longer cross Discord users merely because they share a channel. Zara Core remains authoritative for runtime principal/tool authorization; this slice does not claim to solve the broader public-principal boundary in #26.

Fixes #29 and advances #26. - starts with a deterministic RED contract proving two users in one guild/channel or DM must receive distinct Zara conversation IDs - conversation IDs now contain numeric Discord guild/channel/user IDs only; no usernames/display names - applies the same isolation to message routing and `/zara ask` - rejects malformed non-integer identifiers instead of silently stringifying identity input - documents the transcript-isolation boundary - bumps `zara-discord` to 0.2.1 in runtime metadata, discovery metadata, and `plugins.json` Security property: bounded in-memory transcript history can no longer cross Discord users merely because they share a channel. Zara Core remains authoritative for runtime principal/tool authorization; this slice does not claim to solve the broader public-principal boundary in #26.
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