prune some stuff

TODO.md

@@ -47,23 +47,11 @@ Goal: "aws cli works reliably for CreateTable/ListTables/PutItem/GetItem/DeleteI
 - [x] Expand operator coverage: BETWEEN and begins_with are implemented in parser
 - [x] **Sort key condition filtering in query** — **DONE**: `query()` now accepts optional `Sort_Key_Condition` and applies it (=, <, <=, >, >=, BETWEEN, begins_with)
 
----
+### 5) Service Features
+- [ ] Configuration settings like environment variables for defining users and credentials
+- [ ] Configuration settings for setting up master and replica nodes
 
-## Next (feature parity with Zig + API completeness)
-### 5) UpdateItem / conditional logic groundwork
-- [x] `UpdateItem` handler registered in router (currently returns clear "not yet supported" error)
-- [x] Implement `UpdateItem` (initially minimal: SET for scalar attrs)
-  - [x] `UpdateItem` needs UPDATED_NEW/UPDATED_OLD response filtering for perfect parity with Dynamo
-    - **DONE**: `filter_updated_attributes` extracts modified paths from `Update_Plan` and filters the response item to only include those attributes. `get_update_plan_modified_paths` + `filter_item_to_paths` in `transact.odin`.
-- [x] Add `ConditionExpression` support for Put/Delete/Update (start with simple comparisons)
-- [x] Define internal "update plan" representation (parsed ops → applied mutations)
-
-### 6) Response completeness / options
-- [x] `ReturnValues` handling where relevant (NONE/ALL_OLD/UPDATED_NEW etc. — even partial support is useful)
-- [x] `ProjectionExpression` (return subset of attributes)
-- [x] `FilterExpression` (post-query filter for Scan/Query)
-
-### 7) Test coverage / tooling
+### 6) Test coverage / tooling
 - [ ] Add integration tests mirroring AWS CLI script flows:
   - create table → put → get → scan → query → delete
 - [ ] Add fuzz-ish tests for:
@@ -71,45 +59,19 @@ Goal: "aws cli works reliably for CreateTable/ListTables/PutItem/GetItem/DeleteI
   - expression parsing robustness
   - TLV decode failure cases (corrupt bytes)
 
----
-
-## Later (big features)
-These align with the "Future Enhancements" list in ARCHITECTURE.md.
-
-### 8) Secondary indexes
+### 7) Secondary indexes
 - [ ] Global Secondary Indexes (GSI)
 - [ ] Local Secondary Indexes (LSI)
 - [ ] Index backfill + write-path maintenance
 
-### 9) Batch + transactions
-- [x] BatchWriteItem
-- [x] BatchGetItem
-- [x] Transactions (TransactWriteItems / TransactGetItems)
-  - **DONE**: `transact.odin` implements all-or-nothing semantics:
-    - Put, Delete, Update, ConditionCheck action types
-    - Pre-flight condition evaluation (all conditions checked before any mutation)
-    - Deterministic table lock ordering to prevent deadlocks
-    - `transact_handlers.odin` contains HTTP handlers and JSON parsing
-    - TransactGetItems supports ProjectionExpression per item
-
-### 10) Performance / ops
+### 8) Performance / ops
 - [ ] Connection reuse / keep-alive tuning
 - [ ] Bloom filters / RocksDB options tuning for common patterns
 - [ ] Optional compression policy (LZ4/Zstd knobs)
 - [ ] Parallel scan (segment scanning)
 
----
-
-## Replication / WAL
+### 9) Replication / WAL
 (There is a C++ shim stubbed out for WAL iteration and applying write batches.)
 - [ ] Implement WAL iterator: `latest_sequence`, `wal_iter_next` returning writebatch blob
 - [ ] Implement apply-writebatch on follower
 - [ ] Add a minimal replication test harness (leader generates N ops → follower applies → compare)
-
----
-
-## Housekeeping
-- [x] Fix TODO hygiene: keep this file short and "actionable"
-  - Added "Bug Fixes Applied" section documenting what changed and why
-- [ ] Add a CONTRIBUTING quick checklist (allocator rules, formatting, tests)
-- [ ] Add "known limitations" section in README (unsupported DynamoDB features)