Progress

.gitignore

@@ -1,2 +1,2 @@
 /target
-*.db
+*.db*

TODO.md

@@ -5,55 +5,27 @@
 - [x] SQLite schema + pragmas + ReadPool + WriterHandle (`db.rs`)
 - [x] Config parsing with validation (`config.rs`)
 - [x] Error types with axum IntoResponse (`error.rs`)
-- [x] Consistent hash ring with virtual nodes (`hasher.rs`)
-- [x] Volume HTTP client with .key sidecar writes (`volume.rs`)
+- [x] Consistent hash ring with virtual nodes + stability tests (`hasher.rs`)
+- [x] Volume HTTP client — key-as-path, no sidecar files (`volume.rs`)
 - [x] Health checker background task (`health.rs`)
-- [x] HTTP handlers: GET (302 redirect), PUT (fan-out), DELETE, HEAD, list (`server.rs`)
+- [x] HTTP handlers with pure decision functions extracted (`server.rs`)
 - [x] CLI with clap subcommands (`main.rs`)
-- [x] Wiring: state, routes, health checker startup
+- [x] Rebuild tool — recursive nginx autoindex walk (`rebuild.rs`)
+- [x] Rebalance tool with --dry-run (`rebalance.rs`)
+- [x] Integration tests — 8 tests against real nginx (Docker Compose)
+- [x] Unit tests — 17 tests (hasher, server pure fns, rebalance planning)
+- [x] Key-as-path simplification (removed content-addressed paths + .key sidecars)
 
 ## Remaining
 
-### Core features
-
-- [ ] **Rebuild tool** (`tools/rebuild.rs`)
-  - Scan all volumes for `.key` sidecar files (via nginx autoindex JSON)
-  - Read each `.key` file to recover the original key name
-  - Verify the blob exists alongside each `.key`
-  - Reconstruct SQLite index, merging replicas (same key on multiple volumes)
-  - Uses `db::bulk_put` for efficient batch inserts
-
-- [ ] **Rebalance tool** (`tools/rebalance.rs`)
-  - Load current index, compute desired placement via new ring config
-  - Diff current vs desired volumes per key
-  - Copy blobs to new volumes, delete from old ones
-  - Update SQLite records
-  - `--dry-run` flag to preview without acting
-  - Progress output: keys moved, bytes transferred, errors
-
-### Refactoring
-
-- [ ] **Extract pure decision logic from handlers** (see PHILOSOPHY.md)
-  - `put_key`: separate "compute placement" from "execute IO"
-  - `get_key`: separate "pick healthy volume" from "build redirect"
-  - Make fan-out results processing a pure function
+### Worth doing
 
 - [ ] **Typed volume errors** — replace `String` errors in `volume.rs` with a proper enum
-
-### Testing
-
-- [ ] **Unit tests for `db.rs`** — CRUD with an in-memory SQLite
-- [ ] **Integration test harness** (see TESTING.md)
-  - Docker Compose with 3 nginx volume containers
-  - Rust integration tests that spin up the full server
-  - PUT/GET/DELETE/HEAD happy path
-  - Failure test: kill a volume mid-test, verify reads still work from replica
-  - Rebalance test: add 4th volume, rebalance, verify all keys accessible
-- [ ] **Property-based tests for hasher** — verify ring invariants under add/remove
-
-### Polish
-
+- [ ] **Unit tests for `db.rs`** — CRUD round-trip with in-memory SQLite
 - [ ] **Graceful shutdown** — drain in-flight requests, flush writer
+
+### Nice to have
+
 - [ ] **Metrics** — request count, latency histograms, volume error rates
 - [ ] **Request ID / tracing spans** — per-request trace context
 - [ ] **Config reload** — SIGHUP to reload config without restart