[LinuxDevil]

Summary

• server/passes/portability.ts: the portability_check pass - PORTABILITY_SYSTEM_PROMPT, truncate-don't-reject portabilityOutputSchema (500/200/300/300 clips, 20-finding cap, other enum fallback), bounded buildPortabilityInput (24k instructions cap, 8k masked-JSON sections, { file } instructions noted, secret/env refs rendered as placeholders - never values), and checkPortability caching agent analyses by specHash in the suggestion store / import text in a 20-entry LRU.
• server/passes/portabilityRoutes.ts: POST /agents/:id/portability and POST /agents/import/portability (registered before /agents/:id routes), mapping pass outcomes to 503/409/422/502.
• GET /agents/:id/export?adapt=1 serves the cached adapted instructions; 409 LOUSHO_PORTABILITY_MISSING until a check for the current hash exists.
• runtimeClient: checkPortability, checkImportPortability, downloadExport({ adapt }).
• Shared clip helper extracted to server/passes/clip.ts (was duplicated in draftReview).

Test plan

• portability.test.ts (17): input building, secret-ref masking, caps, file instructions, schema transforms/fallback, adapted-instructions normalization, cache hit/miss + LRU, error mapping, prompt snapshot
• portabilityRoutes.test.ts (7): agent + import routes, caching, error statuses, adapt export success/409 for yaml and bundle
• Server typecheck + full server suite (1578) + touched suites green; eslint clean; fallow dead-code/dupes clean for touched files

Generated with Devin