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v3.7.1 — mine completeness, reconnect integrity, clean shutdown

Post-3.7.0 integrity patch: ingest no longer hangs on non-regular files, incomplete mines can be retried instead of permanently skipped, chromadb reconnect no longer rewinds the HNSW index, and MCP releases the writer lease on SIGTERM/SIGHUP.

Bug Fixes

  • Ingest commands no longer hang on a named pipe. os.walk and glob list a FIFO as an ordinary filename and MemPalace decides what to read from the suffix, so a pipe called notes.md in a mined directory wedged mine in the kernel forever: opening a FIFO for reading waits for a writer that never arrives, and the S_ISREG refusal written on the next line could never run. mine --mode convos, sweep, init, compress and split blocked the same way through their own readers. The four affected opens now pass O_NONBLOCK, which makes the existing type check reachable — a pipe is refused on its mode, with or without a live writer — and the discovery walks drop non-regular entries with a SKIP: <name> (not a regular file) line, so the readers that use a plain open() never see one. Regular files read back byte-identical; the one case where the flag is not inert, a reader breaking a write lease, re-checks the file type and retries without it rather than dropping the file. mine --mode extract was already immune through its zero-size gate. (#2221)
  • Project re-mine no longer silently skips a partial or interrupted file. Four related gaps in process_file: (1) multi-batch upserts now stamp every drawer with chunk_total so file_already_mined can tell "N of N committed" from "crashed after batch 1"; (2) source_mtime comes from the same fstat as the content read, so an append between read and a later re-stat cannot permanently hide the new tail; (3) a failed stale-drawer purge aborts the file instead of half-overwriting; (4) closets are purged even when the re-mine ends with zero drawers. A mid-file upsert failure also deletes the partial drawers and closets for that source before re-raising, so the next mine retries instead of treating the incomplete set as complete. (#2088, [#2122], [#2151])
  • Conversation mine completeness matches the project path. Convo drawers now stamp chunk_total; a mid-batch upsert failure deletes that source's partial drawers before re-raising; prefetch_mined_set omits incomplete groups so the bulk "already filed" skip cannot permanently strand missing exchanges from an interrupted transcript mine. (#2183)
  • Stale chromadb System cache is cleared on palace reconnect. After a peer or rebuild changes chroma.sqlite3 on disk, both mcp_server._get_client and ChromaBackend._client drop chromadb's path-keyed SharedSystemClient cache before reopening — otherwise the stale in-memory HNSW segment is reused and can persist an outdated index over the peer's writes (index count going backwards). (#2002, [#2028], [#2026], [#2032])
  • MCP releases the palace writer lease on SIGTERM/SIGHUP. The lease was only released via atexit, which CPython skips on those signals' default disposition. SSH disconnect (SIGHUP) and container/systemd stop (SIGTERM) therefore left mine_palace_*.lock naming a dead PID until a contender's liveness check reclaimed it. main() now installs handlers that exit through sys.exit, so the existing atexit release path runs. (#2205)

A big thank-you to everyone who contributed to this release. Contributors and first-time contributors are credited below.

What's Changed

New Contributors

Full Changelog: https://github.com/MemPalace/mempalace/compare/v3.7.0...v3.7.1

Install: pip install -U mempalace==3.7.1

Source: README.md, updated 2026-08-14