yams/CHANGELOG.md

Changelog

All notable changes to YAMS (Yet Another Memory System) will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

• SourceHut: https://sr.ht/~trvon/yams/

Archived Changelogs

• v0.6.x archive: docs/changelogs/v0.6.md
• v0.5.x archive: docs/changelogs/v0.5.md
• v0.4.x archive: docs/changelogs/v0.4.md
• v0.3.x archive: docs/changelogs/v0.3.md
• v0.2.x archive: docs/changelogs/v0.2.md
• v0.1.x archive: docs/changelogs/v0.1.md

[v0.7.3] - 2025-10-08

Added

• Bench: minimal daemon warm-start latency check moved to an opt-in bench target and suite.
  • New standalone binary tests/yams_bench_daemon_warm executes a bounded start/sleep/stop cycle with vectors disabled and tight init timeouts; asserts <5s end-to-end.
  • Meson test registered as bench_daemon_warm_latency in the yams:bench suite.
  • Disabled by default in CI; enable by setting RUN_DAEMON_WARM_BENCH=true (workflow env) and YAMS_ENABLE_DAEMON_BENCH=1 (step env) to run only this bench.
• Tree-Diff Metadata & Retrieval Modernization🎉
  • Tree-based snapshot comparison: Implemented Merkle tree-based diff algorithm for efficient snapshot comparison with O(log n) subtree hash optimization for unchanged directories.
  • Rename detection: Hash-based rename/move detection with ≥99% accuracy, enabled by default in yams diff command.
  • Knowledge Graph integration: Path and blob nodes with version edges and rename tracking via fetchPathHistory() API.
  • Enhanced graph command: yams graph now queries KG store for same-content relationships and rename chains.
  • Tree diff as default: yams diff uses tree-based comparison by default; --flat-diff flag available for legacy behavior.
  • RPC/IPC exposure: Added ListTreeDiff method to daemon protocol (protobuf + binary serialization).

Changed

• Compression-first retrieval DocumentService, CLI, and daemon IPC now default to returning compressed payloads with full metadata (algorithm, CRC32s, sizes)
• Path query pipeline: Replaced the legacy findDocumentsByPath helper with the normalized queryDocuments API and the shared queryDocumentsByPattern utility. All services (daemon, CLI, MCP, mobile bindings, repair tooling, vector ingestion) now issue structured queries that leverage the path_prefix, reverse_path, and path_hash indexes plus FTS5 for suffix matches, eliminating full-table LIKE scans.
• Schema migration: Migration v13 (Add path indexing schema) continues to govern the derived columns/indices; applying this release replays the up hook in place (normalizing existing rows and rebuilding the FTS table), so existing deployments automatically benefit from the optimized lookups after the usual migration step.
• CLI Retrieval (get/cat): partial-hash resolution now routes through RetrievalService using the daemon’s streaming search and the metadata-layer hash-prefix index.
  • yams get and yams cat accept 6–64 hex prefixes; ambiguity can be resolved via --latest/--oldest. No more local metadata table scans; latency improves especially on large catalogs.
  • Internals: RetrievalService::resolveHashPrefix consumes SearchService hash results and applies newest/oldest selection hints; GetCommand validates and normalizes hash input before issuing a daemon Get.

Fixed

• Daemon IPC: Fixed a regression in the grep IPC protocol where GrepRequest and GrepResponse messages were not fully serialized, causing data loss. The protocol definitions and serializers have been updated to correctly handle all fields, including show_diff in requests and detailed statistics in responses.
• Indexing: Fixed an issue where updated files were not being re-indexed. The change detection logic now correctly considers file modification time and size, in addition to content hash, to reliably identify changes.
• Indexing: Corrected the document update process to prevent duplicate records for the same file path when a file is updated. The indexer now properly distinguishes between new documents and updates to existing ones.
• Daemon IPC: Fixed an issue where search and grep commands could time out without producing output by improving the efficiency of the daemon's streaming response mechanism.
• Daemon IPC: Optimized non-multiplexed communication paths to prevent performance issues and potential timeouts with large responses from commands like get and cat.

[v0.7.2] - 2025-10-03

Added

• Automatic directory snapshot generation with ISO 8601 timestamp IDs and git metadata detection (commit, branch, remote). Every yams add <directory> now creates a timestamped snapshot stored in the tree_snapshots table.
• Snapshot Listing: New yams list --snapshots command displays all available snapshots with table and JSON output formats, showing snapshot IDs, directory paths, labels, git commits, and file counts.
• Implemented yams diff <snapshotA> <snapshotB> command with tree, flat, and JSON output formats for comparing directory snapshots.
• TreeDiffer automatically detects renamed/moved files via SHA-256 hash equivalence matching, enabled by default.

Changed

• Snapshot Labels: yams add now accepts optional --label flag for human-readable snapshot names.
• Indexing Service: Enhanced to persist snapshot metadata (snapshot_id, directory_path, git metadata, file count) to database after directory ingestion.
• Metadata Repository: Added upsertTreeSnapshot(), listTreeSnapshots(), and tree diff persistence methods for snapshot and change history management.
• Search: Parallelized keyword search scoring loop to significantly improve performance on multi-core systems.
• Search: Search thread pools are now configured by the central TuningManager to adapt to system load and tuning profiles.
• Search: Implemented structural scoring to boost relevance of results that are co-located in the same directory.
• Search: Parallelized keyword search scoring loop to significantly improve performance on multi-core systems.
• Search: Search thread pools are now configured by the central TuningManager to adapt to system load and tuning profiles.
• Search: Implemented structural scoring to boost relevance of results that are co-located in the same directory.
• Added FTS5 readiness fast-path check in getByNameSmart() to prevent 3-second blocking timeouts when search indexes are updating.
• Added post_ingest_queue_depth field to status response, enabling clients to check if FTS5 indexes are ready before attempting expensive search operations.
• TUI browse command now resolves listings and fuzzy search through the shared AppContext service bundle (TUIServices + IDocumentService/ISearchService), with graceful fallback to metadata/content-store paths when the daemon is degraded.
• CLI Browse: Shift+R reindex dialog now performs a full extraction + index refresh through TUIServices::reindexDocument, providing inline success/error feedback instead of the previous placeholder flow.

Fixed

• Daemon IPC: SocketServer now shares a live writer-budget reference with every connection and the tuning manager pushes updates through it. Multiplexed streams adjust bandwidth limits immediately when profiles or runtime heuristics change.
• Search: Corrected an issue where yams search --include was not being applied for hybrid searches. The include pattern is now passed to the daemon and correctly filters results.
• Fixed protobuf UTF-8 validation errors when grepping binary files or non-UTF-8 text. Changed GrepMatch.line, context_before, and context_after fields from string to bytes type in protobuf definition. This allows grep to handle arbitrary byte sequences including binary content, Latin-1, Windows-1252, and other legacy encodings without validation failures. (PBI-001, task 001-33)
• Daemon IPC: replaced the io_context.run_for polling loop with dedicated run_one workers so async accept completions are no longer starved during streaming requests. Added optional diagnostic thread (YAMS_SOCKET_RUN_DIAG) for debugging.
• CLI Browse: refuse to launch the FTXUI browser when the terminal is non-interactive, lacks TERM capabilities, or is smaller than 60x18; emit a clear resize guidance message instead of hanging or crashing.
• CLI Search: release pooled daemon clients before process teardown to prevent the std::system_error: mutex lock failed abort when yams search exits after hitting the daemon path.

[v0.7.1] - 2025-09-29

Changed

• GrepService: expanded candidate discovery to preselect from req.paths using SQL LIKE prefix scans, aligning service behavior with CLI expectations for directory patterns.
• RepairCoordinator refocus: on live DocumentAdded events, skip queuing when the post‑ingest
• Post‑ingest pipeline: improvements
• ServiceManager enqueue path: simplified enqueuePostIngest to a direct blocking enqueue. This improves predictability and throughput under high load.
• CLI Download UX: yams download now clearly displays the ingested content hash

Fixed

• GrepService streaming: flushes the final partial line when scanning cold CAS streams so single-line files are matched reliably (e.g., hello.txt).
• Reduced GrepService log verbosity to debug for internal counters and match traces.
• Fixed IPC protocol regression where grep and list commands failed to properly communicate with the daemon after migration, causing incomplete results or timeouts in multi-service environments.
  • This issue impacted other tools result output
• Guarded compression monitor global statistics with a dedicated mutex to stop concurrent tracker updates from crashing unit_shard5 (validated via meson test -C build/debug unit_shard5 --print-errorlogs).
• Repaired the document_service metadata pipeline regression so fixture-driven search tests no longer observe missing extracted content.
• MCP stdio transport: replaced unused static output mutex with an instance mutex to satisfy ODR/build on certain platforms.

[v0.7.0] - 2025-09-25

Highlights

• These changes reduce CPU spikes observed in profiles for large greps and remove blocking storage scans from interactive status paths. Post-ingest work is intentionally bounded; processing may take longer, but overall system responsiveness improves.
• Stability: resolved connection timeouts under multi-agent load by removing the hard 100-connection cap and deriving a dynamic accept limit. Defaults honor YAMS_MAX_ACTIVE_CONN or compute a safe cap from CPU cores and IO concurrency.
• Throughput: added tuning profiles (efficient | balanced | aggressive). Profiles modulate pool growth, IO thresholds, and post-ingest workers. Default is balanced.
• Indexing UX: Add/ingest returns fast; post‑ingest queue handles FTS/embeddings/KG in the background. Path‑series versioning (Phase 1) is on by default behind an env flag.

Added

• Tuning profiles selectable via config or env:

  • Config: yams config set tuning.profile <efficient|balanced|aggressive>
  • Env: YAMS_TUNING_PROFILE=<profile>

• Config defaults now include [tuning] profile = "balanced".

• Docs: docs/admin/tuning_profiles.md covering profiles, envs, and observability.

• Versioning (Phase 1): path‑series lineage with VersionOf edges and metadata flags version, is_latest, series_key. Duplicate (same hash) re‑ingest does not create a new version; alternate locations and timestamps are updated.

• CLI Search: grouped multi‑version presentation (default on) with new controls.

  • Groups results by canonical path when multiple versions of the same file are returned.
  • New flags:
    • --no-group-versions — disable grouping and show the flat list.
    • --versions <latest|all> — choose best only (default: latest) or list versions per path.
    • --versions-topk <N> — cap versions shown per path when --versions=all (default: 3).
    • --versions-sort <score|path|title> — sort versions within a group (default: score).
    • --no-tools — hide per‑version tool hints.
    • --json-grouped — emit grouped JSON; plain --json remains flat and backward compatible.
  • Tool hints shown per version (when grouped): yams get --hash <hash> | yams cat --hash <hash> | yams restore --hash <hash>; if a local file path is resolved, a yams diff --hash <hash> <local-path> hint is added.
  • Environment toggles: YAMS_NO_GROUP_VERSIONS=1 and YAMS_NO_GROUP_TOOLS=1 to flip defaults.
  • Note: This is a presentation‑layer change; service/daemon APIs are unchanged.

Changed

• Build System
  • The primary build system has been migrated from CMake to Meson. All build, test, and packaging scripts have been updated to use the new Meson-based workflow.
• Status/Stats (CLI): use daemon metrics by default and never trigger local storage scans.
  • yams status and yams stats -v now render from the same non-detailed daemon snapshot; removed the "scanning storage..." spinner and filesystem walks.
  • Verbose output formats the JSON fields instead of performing extra scans.
• Tools/Stats (yams-tools): tools/yams-tools/src/commands/stats_command.cpp refactored to prefer daemon-first metrics with a legacy local fallback only if daemon is unavailable.
• MCP add_directory: switched to daemon-first ingestion with a brief readiness wait to avoid "Content store not available" races. Removes local store preflight; maps NotInitialized to a clear, retryable message from the daemon.
• MCP search: path normalization + optional diff parity with CLI.
  • New request field include_diff adds a structured diff block to results when the path_pattern points to a local file; mirrors yams search diff behavior.
  • MCPSearch DTOs extended to round-trip include_diff, diff, and local_input_file.
• Daemon accept scaling: removed fixed cap; now dynamically computes maxConnections from recommendedThreads * ioConnPerThread * 4 (min 256) unless YAMS_MAX_ACTIVE_CONN is set.
• Backpressure: increased default read pause to 10ms to smooth heavy load.
• Post‑ingest: preserves bounded capacity; de‑dupes inflight, indexes FTS, updates fuzzy index, and emits KG nodes/edges best‑effort.
• Status/Stats: JSON correctness improvements; omit misleading savings when physical size unknown; surface post‑ingest bus usage and document counters.
• CLI Search: grouping of multiple versions per path is enabled by default; paths‑only output and flat JSON remain unchanged unless --json-grouped is specified.

Fixed

• Regression in metadata extraction and storage used in search and grep tools The async post-ingest pipeline never persisted extracted text into the metadata store. As a result, document_content stayed empty, so search, repairs, and semantic pipelines saw “Document content not found” despite vector insert logs.
• Many tuning optimizations for daemon usage
• Grep pipeline: staged KG → metadata → content with caps and budget.
  • Prefers "hot" text (metadata-extracted) and caps cold CAS reads; early path/include filters.
  • Added a global time budget (internal) to stop long content scans gracefully.
  • Capped grep worker threads to a small, background-friendly number by default (≤4).
• Grep streaming optimization: replaced per-character streambuf overflow with bulk line splitting (memchr-based) to eliminate the per-byte hotspot in profiles during CAS streaming.
• Post-ingest queue: bounded by configuration, not CPU heuristics.
  • Default worker threads set conservatively to 1 unless configured in [tuning] as post_ingest_threads. Queue capacity now honored from post_ingest_queue_max.
  • Added a tiny yield between tasks to reduce contention and smooth CPU.
• Addressed intermittent CLI timeouts and “Broken pipe” logs observed when many agents connected concurrently. Accept loop backoff now respects the higher connection cap and IO pool growth from the tuning manager.
• Minor unit test fixes (Result value handling) to unblock CI.