feat: v1.4 — PARA Migration

CHANGELOG.md

@@ -1,5 +1,22 @@
 # Changelog
 
+## v1.4.0 — PARA Migration (2026-03-26)
+
+### Added
+- **PARA migration engine** (`migrate.rs`) — AI-assisted vault restructuring into Projects/Areas/Resources/Archive
+- **Heuristic classification** — priority-ordered rules detect Projects (tasks, active status), Areas (recurring topics), Resources (people, reference), Archive (done, inactive)
+- **Preview-then-apply workflow** — generates markdown + JSON preview for review before moving files
+- **Migration rollback** — `engraph migrate para --undo` reverses the last migration
+- **3 new MCP tools** — `migrate_preview`, `migrate_apply`, `migrate_undo`
+- **3 new HTTP endpoints** — `POST /api/migrate/preview`, `/apply`, `/undo`
+- **Migration log** — SQLite table tracks all moves for rollback support
+
+### Changed
+- Module count: 24 → 25
+- MCP tools: 19 → 22
+- HTTP endpoints: 20 → 23
+- Test count: 385 → 417
+
 ## v1.3.0 — HTTP/REST Transport (2026-03-26)
 
 ### Added

CLAUDE.md

@@ -4,7 +4,7 @@ Local knowledge graph + intelligence layer for Obsidian vaults. Rust CLI + MCP s
 
 ## Architecture
 
-Single binary with 24 modules behind a lib crate:
+Single binary with 25 modules behind a lib crate:
 
 - `config.rs` — loads `~/.engraph/config.toml` and `vault.toml`, merges CLI args, provides `data_dir()`. Includes `intelligence: Option<bool>`, `[models]` section for model overrides, `[obsidian]` section (CLI path, enabled flag), and `[agents]` section (registered AI agent names). `Config::save()` writes back to disk.
 - `chunker.rs` — smart chunking with break-point scoring algorithm. Finds optimal split points considering headings, code fences, blank lines, and thematic breaks. `split_oversized_chunks()` handles token-aware secondary splitting with overlap
@@ -13,6 +13,7 @@ Single binary with 24 modules behind a lib crate:
 - `fts.rs` — FTS5 full-text search support. Re-exports `FtsResult` from store. BM25-ranked keyword search
 - `fusion.rs` — Reciprocal Rank Fusion (RRF) engine. Merges semantic + FTS5 + graph + reranker results. Supports per-lane weighting, `--explain` output with intent + per-lane detail
 - `markdown.rs` — section parser. Heading detection (ATX `#` headings with level tracking), section extraction by heading text, frontmatter splitting (YAML block between `---` fences). Powers section-level reading and editing
+- `migrate.rs` — PARA migration engine. Heuristic classification of vault notes into Projects/Areas/Resources/Archive using priority-ordered rules (tasks, active status, recurring topics, people, reference, done/inactive). Preview-then-apply workflow generates markdown + JSON preview for review before moving files. Rollback support via `engraph migrate para --undo` reverses the last migration using SQLite migration log. Three MCP tools (`migrate_preview`, `migrate_apply`, `migrate_undo`) and three HTTP endpoints (`POST /api/migrate/preview`, `/apply`, `/undo`)
 - `obsidian.rs` — Obsidian CLI wrapper. Process detection (checks if Obsidian is running), circuit breaker state machine (Closed/Degraded/Open) for resilient CLI delegation, async subprocess execution with timeout. Falls back gracefully when Obsidian is unavailable
 - `health.rs` — vault health diagnostics. Orphan detection (notes with no incoming or outgoing wikilinks), broken link detection (wikilinks pointing to nonexistent notes), stale note detection (notes not modified within configurable threshold), tag hygiene (unused/rare tags). Returns structured health report
 - `context.rs` — context engine. Seven functions: `read` (full note content + metadata), `read_section` (targeted section extraction by heading), `list` (filtered note listing with `created_by` filter), `vault_map` (structure overview), `who` (person context bundle), `project` (project context bundle), `context_topic` (rich topic context with budget trimming). Pure functions taking `ContextParams` — no model loading except `context_topic` which reuses `search_internal`
@@ -22,16 +23,16 @@ Single binary with 24 modules behind a lib crate:
 - `placement.rs` — folder placement engine. Uses folder centroids (online mean of embeddings per folder) to suggest the best folder for new notes. Falls back to inbox when confidence is low. Includes placement correction detection (`detect_correction_from_frontmatter`) and frontmatter stripping for moved files
 - `writer.rs` — write pipeline orchestrator. 5-step pipeline: resolve tags (fuzzy match + register new), discover links (exact + fuzzy), place in folder, atomic file write (temp + rename), and index update. Supports create, append, update_metadata, move_note, archive, unarchive, edit (section-level replace/prepend/append), rewrite (full content with frontmatter preservation), edit_frontmatter (granular set/remove/add_tag/remove_tag/add_alias/remove_alias ops), and delete (soft archive or hard permanent) operations with mtime-based conflict detection and crash recovery via temp file cleanup
 - `watcher.rs` — file watcher for `engraph serve`. OS thread producer (notify-debouncer-full, 2s debounce) sends `Vec<WatchEvent>` over tokio::mpsc to async consumer task. Two-pass batch processing: mutations (index_file/remove_file/rename_file) then edge rebuild. Move detection via content hash matching. Placement correction on file moves. Centroid adjustment on file add/remove. Startup reconciliation via `run_index_shared`. `recent_writes` map coordination with MCP server to prevent double re-indexing of files written through the write pipeline
-- `serve.rs` — MCP stdio server via rmcp SDK. Exposes 19 tools: 8 read (search, read, read_section, list, vault_map, who, project, context) + 10 write (create, append, update_metadata, move_note, archive, unarchive, edit, rewrite, edit_frontmatter, delete) + 1 diagnostic (health). `edit_frontmatter` replaces `update_metadata` for granular frontmatter mutations. EngraphServer struct with Arc+Mutex wrapping for async handlers. Loads intelligence models (orchestrator + reranker) when enabled, wires into `search_with_intelligence`. Spawns file watcher on startup. CLI events table provides audit log for write operations. `recent_writes` map prevents double re-indexing of MCP-written files
-- `http.rs` — axum-based HTTP REST API server, enabled via `engraph serve --http`. 20 REST endpoints mirroring all 19 MCP tools + update-metadata. API key authentication with `eg_` prefixed keys and read/write permission levels. Per-key token bucket rate limiting (configurable requests/minute). CORS with configurable allowed origins for web-based agents. `--no-auth` mode for local development (127.0.0.1 only). Graceful shutdown via `CancellationToken` coordinating MCP + HTTP + watcher exit
+- `serve.rs` — MCP stdio server via rmcp SDK. Exposes 22 tools: 8 read (search, read, read_section, list, vault_map, who, project, context) + 10 write (create, append, update_metadata, move_note, archive, unarchive, edit, rewrite, edit_frontmatter, delete) + 1 diagnostic (health) + 3 migrate (migrate_preview, migrate_apply, migrate_undo). `edit_frontmatter` replaces `update_metadata` for granular frontmatter mutations. EngraphServer struct with Arc+Mutex wrapping for async handlers. Loads intelligence models (orchestrator + reranker) when enabled, wires into `search_with_intelligence`. Spawns file watcher on startup. CLI events table provides audit log for write operations. `recent_writes` map prevents double re-indexing of MCP-written files
+- `http.rs` — axum-based HTTP REST API server, enabled via `engraph serve --http`. 23 REST endpoints mirroring all 22 MCP tools + update-metadata. API key authentication with `eg_` prefixed keys and read/write permission levels. Per-key token bucket rate limiting (configurable requests/minute). CORS with configurable allowed origins for web-based agents. `--no-auth` mode for local development (127.0.0.1 only). Graceful shutdown via `CancellationToken` coordinating MCP + HTTP + watcher exit
 - `graph.rs` — vault graph agent. Extracts wikilink targets, expands search results by following graph connections 1-2 hops. Relevance filtering via FTS5 term check and shared tags
 - `profile.rs` — vault profile detection. Auto-detects PARA/Folders/Flat structure, vault type (Obsidian/Logseq/Plain), wikilinks, frontmatter, tags. Content-based role detection for people/daily/archive folders by content patterns (not just names). Writes/loads `vault.toml`
 - `store.rs` — SQLite persistence. Tables: `meta`, `files` (with docid, created_by), `chunks` (with vector BLOBs), `chunks_fts` (FTS5), `edges` (vault graph), `tombstones`, `tag_registry`, `folder_centroids`, `placement_corrections`, `link_skiplist` (reserved), `llm_cache` (orchestrator result cache), `cli_events` (audit log for CLI operations). `vec_chunks` virtual table (sqlite-vec) for KNN search. Dynamic embedding dimension stored in meta. `has_dimension_mismatch()` and `reset_for_reindex()` for migration. Enhanced `resolve_file()` with fuzzy Levenshtein matching as final fallback
 - `indexer.rs` — orchestrates vault walking (via `ignore` crate for `.gitignore` support), diffing, chunking, embedding, writes to store + sqlite-vec + FTS5, vault graph edge building (wikilinks + people detection), and folder centroid computation. Exposes `index_file`, `remove_file`, `rename_file` as public per-file functions. `run_index_shared` accepts external store/embedder for watcher FullRescan. Dimension migration on model change.
 - `temporal.rs` — temporal search lane. Extracts note dates from frontmatter `date:` field or `YYYY-MM-DD` filename patterns. Heuristic date parsing for natural language ("today", "yesterday", "last week", "this month", "recent", month names, ISO dates, date ranges). Smooth decay scoring for files near but outside target date range. Provides `extract_note_date()` for indexing and `score_temporal()` + `parse_date_range_heuristic()` for search
 - `search.rs` — hybrid search orchestrator. `search_with_intelligence()` runs the full pipeline: orchestrate (intent + expansions) → 5-lane RRF retrieval (semantic + FTS5 + graph + reranker + temporal) per expansion → two-pass RRF fusion. `search_internal()` is a thin wrapper without intelligence models. Adaptive lane weights per query intent including temporal (1.5 weight for time-aware queries). Results display normalized confidence percentages (0-100%) instead of raw RRF scores.
 
-`main.rs` is a thin clap CLI (async via `#[tokio::main]`). Subcommands: `index` (with progress bar), `search` (with `--explain`, loads intelligence models when enabled), `status` (shows intelligence state + date coverage stats), `clear`, `init` (intelligence onboarding prompt, detects Obsidian CLI + AI agents), `configure` (`--enable-intelligence`, `--disable-intelligence`, `--model`, `--obsidian-cli`, `--no-obsidian-cli`, `--agent`, `--add-api-key`, `--list-api-keys`, `--revoke-api-key`), `models`, `graph` (show/stats), `context` (read/list/vault-map/who/project/topic), `write` (create/append/update-metadata/move/edit/rewrite/edit-frontmatter/delete), `serve` (MCP stdio server with file watcher + intelligence + optional `--http`/`--port`/`--host`/`--no-auth` for HTTP REST API).
+`main.rs` is a thin clap CLI (async via `#[tokio::main]`). Subcommands: `index` (with progress bar), `search` (with `--explain`, loads intelligence models when enabled), `status` (shows intelligence state + date coverage stats), `clear`, `init` (intelligence onboarding prompt, detects Obsidian CLI + AI agents), `configure` (`--enable-intelligence`, `--disable-intelligence`, `--model`, `--obsidian-cli`, `--no-obsidian-cli`, `--agent`, `--add-api-key`, `--list-api-keys`, `--revoke-api-key`), `models`, `graph` (show/stats), `context` (read/list/vault-map/who/project/topic), `write` (create/append/update-metadata/move/edit/rewrite/edit-frontmatter/delete), `migrate` (para with `--preview`/`--apply`/`--undo` for PARA vault restructuring), `serve` (MCP stdio server with file watcher + intelligence + optional `--http`/`--port`/`--host`/`--no-auth` for HTTP REST API).
 
 ## Key patterns
 
@@ -80,7 +81,7 @@ Single vault only. Re-indexing a different vault path triggers a confirmation pr
 
 ## Testing
 
-- Unit tests in each module (`cargo test --lib`) — 385 tests, no network required
+- Unit tests in each module (`cargo test --lib`) — 417 tests, no network required
 - Integration tests (`cargo test --test integration -- --ignored`) — require GGUF model download
 - Build requires CMake (for llama.cpp C++ compilation)
 

Cargo.toml

@@ -41,6 +41,7 @@ shimmytok = "0.7"
 axum = "0.8"
 tower-http = { version = "0.6", features = ["cors"] }
 tower = "0.5"
+uuid = { version = "1", features = ["v4"] }
 rand = "0.9"
 tokio-util = "0.7"