Summary

• Make loaded plugin metadata snapshots immutable and return the same frozen snapshot from the process memo instead of cloning on cache hits.
• Reduce installed plugin package path churn by reusing persisted package file signatures where available while preserving realpath containment for package metadata hydration.
• Add an identity cache for normalized Jiti alias maps and delay Discord realtime speaker-turn queue/log work until the first audio frame using deferred turn-context retention.

Verification

• node scripts/run-vitest.mjs src/talk/turn-context-tracker.test.ts src/plugins/plugin-metadata-snapshot.memo.test.ts src/plugins/manifest-registry-installed.test.ts src/plugins/sdk-alias.test.ts src/plugins/installed-plugin-index-records.test.ts
• node scripts/run-vitest.mjs src/plugins/plugin-metadata-snapshot.memo.test.ts
• pnpm test extensions/discord/src/voice/manager.e2e.test.ts --testNamePattern "keeps realtime playback alive|interrupts realtime playback|does not interrupt realtime provider state"
• pnpm lint --threads=8
• pnpm exec oxfmt --check src/plugins/plugin-metadata-snapshot.ts src/plugins/plugin-metadata-snapshot.memo.test.ts src/plugins/manifest-registry-installed.ts src/plugins/installed-plugin-index-record-builder.ts src/plugins/sdk-alias.ts extensions/discord/src/voice/realtime.ts
• pnpm tsgo:core
• pnpm tsgo:extensions
• pnpm build
• /Users/steipete/Projects/agent-scripts/skills/autoreview/scripts/autoreview --mode commit --commit HEAD

Real behavior proof

Behavior addressed: CPU profile hotspots from repeated metadata snapshot cloning, repeated plugin path/signature work, Jiti alias normalization, and empty Discord realtime speaker turn churn.
Real environment tested: local OpenClaw checkout on macOS, Node/pnpm repo toolchain.
Exact steps or command run after this patch: focused Vitest plugin/talk tests, focused Discord realtime e2e tests, lint, oxfmt check, core and extension tsgo, full pnpm build, and autoreview.
Evidence after fix: focused plugin/talk tests passed 117 tests across 5 files plus metadata snapshot retest passed 27 tests; focused Discord realtime e2e passed 3 selected tests; lint, build, and type gates passed; autoreview reported no accepted/actionable findings.
Observed result after fix: metadata memo returns the same immutable snapshot without clone-on-hit, provided index inputs remain mutable for callers, symlink package metadata escape remains blocked, deferred turn tracking preserves audio-backed turns, and Discord realtime no-audio turns no longer enter the pending queue/log path.
What was not tested: live Discord voice traffic and a fresh CPU profile comparison after this exact patch.