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f353eb056a
UDS messaging now uses private local capabilities instead of exposing auth tokens through SDK metadata, environment variables, session registry, peer listing, or tool output. The receive path bounds NDJSON frames, response buffers, active clients, and pending inbox bytes, and strips auth metadata before messages enter the prompt queue. Teammate mailboxes now validate file and message sizes, fail closed on corrupt mutation inputs, compact by count and retained bytes, and use stable message identity for in-process acknowledgements. Agent summaries now fork only a bounded recent context using lazy size estimation and content fingerprints instead of retaining or serializing unbounded histories. Constraint: PR #361 was already merged; this branch is based on upstream/main@c2ac9a74. Rejected: Default-disabling COORDINATOR_MODE/TEAMMEM only | explicit feature enablement still hit unbounded paths. Rejected: Persisting UDS auth in SDK/env/session registry | bridge/remote metadata can leak local capability secrets. Rejected: Inline uds #token addresses | observable/tool/classifier paths can reflect raw addresses outside the UDS request frame. Rejected: Positional mailbox marking after compaction | compaction can shift indices across the lock boundary. Confidence: high Scope-risk: moderate Directive: Do not expose UDS capability tokens through SDK messages, environment variables, session registry, peer-list output, or SendMessage result/classifier surfaces. Directive: Do not reintroduce positional mailbox acknowledgements unless compaction is removed or read+mark is atomic under one lock. Tested: bun test src/utils/__tests__/ndjsonFramer.test.ts src/utils/__tests__/udsMessaging.test.ts packages/builtin-tools/src/tools/SendMessageTool/__tests__/udsRecipientSanitization.test.ts Tested: bunx tsc --noEmit --pretty false Tested: bun run lint Tested: bunx biome lint modified src/package files Tested: bun run test:all (3704 pass, 0 fail, 6734 expects) Tested: bun audit (No vulnerabilities found) Tested: bun run build Tested: bun run build:vite Tested: git diff --check Not-tested: End-to-end external UDS client driving a full production headless model turn.