knowledge-base/Session_Summaries/2026-03-01_Upload-Pipeline-Filesystem-Consolidation.md

Session Summary – March 1, 2026

Upload Pipeline + Filesystem Consolidation

Direct runtime upload model implemented and confirmed. Filesystem architecture docs consolidated.

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What Shipped

Upload Model

• Implemented direct runtime upload model
• Removed staging and symlink exploration entirely
• Uploads write atomically to runtime root
• Enforced by strict allowlist (mods/*.jar, world/datapacks/*.zip)

Provenance

• Added .zlh_metadata.json provenance tracking
• Extended stat response with source field ("user" | null)
• No curated inference implemented (intentional)

API Transport

• Identified fetch() streaming as source of upload proxy timing issues
• Switched to raw http.request piping (req.pipe(proxyReq) / proxyRes.pipe(res))
• Confirmed agent upload via direct curl
• Upload timeout tuning identified as remaining work

Documentation

• Consolidated filesystem architecture docs (filesystem-and-file-browser.md, mod-deployment-safety.md)
• Full zlh-grind repo consolidation pass (README, CONSTRAINTS, OPEN_THREADS, SESSION_START, ANTI_DRIFT, UPSTREAMS)

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System State

• Read: Stable
• Write: Stable with shadow backup
• Delete: Constrained and safe
• Upload: Implemented, transport tuning in progress
• Console: Stable

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Remaining Focus

• Upload transport diagnostics (distinguish client abort / upstream timeout / socket reset)
• Increase upload route timeout
• Dev server filesystem model planning (not yet designed)