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v3.5.0 — local write daemon, opt-in HTTP transport, and palace-cleanup tooling

This cycle adds two new ways to run MemPalace's write path and a set of tools for keeping a palace clean. An opt-in local daemon serializes background mines, diary saves, and hook ingests through a single process instead of racing for the palace handle, and an opt-in HTTP transport lets the MCP server run behind a long-lived HTTP client/proxy — loopback-default, with a Host/Origin DNS-rebinding guard and an optional bearer token. Three new MCP tools land alongside: mempalace_checkpoint (batch a whole session into one save), mempalace_delete_by_source (surgically purge mined benchmark/eval contamination — drawers and their index entries), and a source_file filter for scoped search. New transcript parsers (Continue.dev, Gemini CLI, Pi) and miner coverage for C#/PHP/Swift/Kotlin/Java widen what you can mine, and a batch of large-palace performance and reliability fixes round out the release.

Features

  • Opt-in local daemon for queued writes. mempalace daemon serializes all palace writes through one local process so background work stops racing the palace handle. Opt-in and local-only. (#1826)
  • Opt-in HTTP transport for the MCP server. mempalace-mcp --transport http serves JSON-RPC at POST /mcp (with GET /healthz) for proxy/long-lived deployments. stdio remains the default; the HTTP path binds 127.0.0.1, pins Host and rejects non-loopback Origin (DNS-rebinding guard), and supports an optional MEMPALACE_MCP_HTTP_TOKEN bearer token. (#1801, [#1806])
  • mempalace_checkpoint batch-save tool. Files multiple add_drawer calls plus an optional diary entry in a single MCP round-trip, verbatim, reusing the idempotent add/dedup path. (#1851)
  • mempalace_delete_by_source bulk-cleanup tool. Exact-match, dry-run-by-default deletion of every drawer and its closet/AAAK index entries for a source_file — the recourse when benchmark/eval files get mined into a real wing. The dry run reports the blast radius; the commit writes a WAL audit entry. (#1722, [#1729])
  • Optional source_file filter for mempalace_search. Scope a search to an exact stored path; threaded through every search path so it never silently drops a match. (#1815, [#1817])
  • New transcript parsers — Continue.dev sessions (#731), Gemini CLI / AI Studio (#204), and Pi agent JSONL (#169).
  • Wider miner language coverage — C#/.NET, PHP (#1819), Swift/Kotlin (#1368), and Java project detection incl. rootless subprojects (#1720).
  • Final mine on Claude plugin SessionEnd so the last exchanges are captured at session close. (#1814, [#1820])

Performance

  • Overview/status and graph_stats answered from the SQLite aggregate — fixes large-palace timeouts. (#1748, [#1379])
  • Embedder caps ONNX-runtime intra-op threads so a background mine no longer pins every core. (#1068)
  • SQL-pushdown pagination for sqlite_exact (#1842) and pgvector (#1840), plus single-scroll bulk metadata for Qdrant (#1832).

Bug Fixes

  • pgvector tolerates hostile transcript bytes — a lone surrogate (#1833) or NUL byte (#1829) no longer aborts the whole mine.
  • Diverged-index recovery points at repair --mode from-sqlite, not a re-mine — re-mining silently dropped MCP-added drawers and diary entries. (#1843, [#1847], [#1849])
  • Stale ChromaDB HNSW divergence routes to the SQLite fallback instead of failing the read. (#1816, [#1822])
  • The MCP server refuses a second writer for the same palace rather than racing the HNSW handle. (#1818, [#1823])
  • Windows hook miner spawns with CREATE_NO_WINDOW — no console flash. (#1783, [#1848])
  • Percent-encoded SQLite read-only URIs so spaced/special-char palace paths open.

CI

  • test-windows retries only the transient ChromaDB HNSW compaction flake (--only-rerun); Linux/macOS keep zero reruns so real regressions stay loud. (#1854)

A big thank-you to everyone who contributed this cycle — many of these features and fixes came from the community, including several first-time contributors. Everyone is credited below.

What's Changed

New Contributors

Full Changelog: https://github.com/MemPalace/mempalace/compare/v3.4.1...v3.5.0

Source: README.md, updated 2026-06-23