@@ -3,7 +3,12 @@
 Notable changes to `adata-cli`. Versions are `MAJOR.MINOR.PATCH`; tags carry no
 `v` prefix.
 
-## Unreleased
+## 0.6.0
+
+Adds `adata convert`, and fixes four quadratic paths that made `concat` and
+`split` appear to hang on real data. Three of the four were found by a new
+suite of complexity guards, which now run on every pull request; the first
+was reported from a pipeline that had to kill twelve tasks after 98 minutes.
 
 ### Added
 
@@ -37,6 +42,30 @@ Notable changes to `adata-cli`. Versions are `MAJOR.MINOR.PATCH`; tags carry no
   matrix encoding. The check itself is not new, but nothing tested it and it
   could not suggest a fix, because there was none.
 
+- **Complexity guards in the test suite** (`tests/test_performance.py`).
+  Cost regressions now fail at merge time. They count operations rather than
+  seconds -- h5py and zarr reads, Zarr store traffic, Python allocation and
+  executed lines -- and assert that successive increments grow no faster than
+  linearly, so nothing here can fail because a CI runner was busy. See
+  [docs/TESTING.md](docs/TESTING.md#performance). Every subcommand is covered:
+  `ls`, `view`, `create`, all five `export` and all five `import` variants,
+  `split` on both axes, and the `concat` options nothing else reached.
+  Two claims are now enforced rather than described -- `view` and `ls` read
+  **zero** data elements at any store size, and streaming stays far below the
+  input curve at a fixed `--chunk`.
+
+- **A comparative benchmark** (`benchmarks/`), run on every tag against
+  anndata and against scanpy where scanpy has a real equivalent. Reports peak
+  RSS, wall time and output size; publishes to
+  [docs/BENCHMARKS.md](docs/BENCHMARKS.md) and the release notes. Report-only
+  -- it never fails a build. Fifteen cases, covering every command with a real
+  baseline, including `h5ls -r` for `ls` and the rows where adata-cli is the
+  slower of the two.
+
+- **`--merge drop` and `--uns-merge drop` are accepted.** `drop` was already
+  the documented default behaviour but was rejected as a value, so a config
+  could not state it explicitly.
+
 ### Fixed
 
 - **`concat --merge` never finished on a real store.** Aligning a var column
@@ -47,34 +76,24 @@ Notable changes to `adata-cli`. Versions are `MAJOR.MINOR.PATCH`; tags carry no
   of 13 pipeline tasks had to be killed after 98 minutes. The column is now
   read once per input, and `--merge first` / `--merge only`, which decide on
   presence alone, read no column values at all.
+
 - **`concat` was quadratic in the number of categories** in an obs column.
   Category merging probed a list rather than a dict: 2,096,128 string
   comparisons to union 1,024 categories, and around 5e9 for a 100k-category
   column. Found by the new guards.
+
 - **`split --by` was quadratic**, O(n_rows x n_groups). `group_indices` grouped
   rows with `np.nonzero(values == label)` inside a loop over distinct labels,
   rescanning each chunk once per label: at 4,096 rows, 16,384 elements scanned
   for 4 groups and 1,048,576 for 256. A million cells split by a thousand
   samples is ~10^9 comparisons. One `np.unique` pass per chunk makes it flat
   in the group count. Found by the new guards; order of first appearance,
   which names the output files, is unchanged.
+
 - **`concat` built a Python object per row** for nullable and string obs
   columns, then walked the list twice more. Filling a typed buffer by slice
   removes three full passes over every such column.
 
-### Added
-
-- **Complexity guards in the test suite** (`tests/test_performance.py`).
-  Cost regressions now fail at merge time. They count operations rather than
-  seconds -- h5py and zarr reads, Zarr store traffic, Python allocation and
-  executed lines -- and assert that successive increments grow no faster than
-  linearly, so nothing here can fail because a CI runner was busy. See
-  [docs/TESTING.md](docs/TESTING.md#performance). Every subcommand is covered:
-  `ls`, `view`, `create`, all five `export` and all five `import` variants,
-  `split` on both axes, and the `concat` options nothing else reached.
-  Two claims are now enforced rather than described -- `view` and `ls` read
-  **zero** data elements at any store size, and streaming stays far below the
-  input curve at a fixed `--chunk`.
 - **Copying variable-length strings ignored its own read budget.** The width
   of a vlen element was assumed to be 64 bytes, because h5py reports the
   itemsize of a pointer, so the step was the same 524,288 elements whatever
@@ -84,6 +103,7 @@ Notable changes to `adata-cli`. Versions are `MAJOR.MINOR.PATCH`; tags carry no
   sampled from the first 256 elements. Reported by an automated review on
   PR #14 and confirmed by measurement; `uns` can hold arbitrary text, so this
   was not a width the layer could assume.
+
 - **Peak RSS in the benchmark was floored by the runner's own memory on Linux.**
   A forked child inherits its parent's resident pages and `execve` folds that
   into the `maxrss` the kernel reports, so every contender would have measured
@@ -93,16 +113,6 @@ Notable changes to `adata-cli`. Versions are `MAJOR.MINOR.PATCH`; tags carry no
   child goes from 326 MB to 8 MB. Caught by `test_benchmark_harness.py`, which
   exists for exactly this. The published figures were measured on macOS, which
   resets the high-water mark at exec, and are unchanged.
-- **A comparative benchmark** (`benchmarks/`), run on every tag against
-  anndata and against scanpy where scanpy has a real equivalent. Reports peak
-  RSS, wall time and output size; publishes to
-  [docs/BENCHMARKS.md](docs/BENCHMARKS.md) and the release notes. Report-only
-  -- it never fails a build. Fifteen cases, covering every command with a real
-  baseline, including `h5ls -r` for `ls` and the rows where adata-cli is the
-  slower of the two.
-- **`--merge drop` and `--uns-merge drop` are accepted.** `drop` was already
-  the documented default behaviour but was rejected as a value, so a config
-  could not state it explicitly.
 
 ## 0.5.1
 
 
@@ -3,7 +3,7 @@
 # so the distribution is published as `pyadata-cli`. The import package
 # and the command are both still `adata`.
 name = "pyadata-cli"
-version = "0.5.1"
+version = "0.6.0"
 description = "Streaming CLI for exploring and editing large AnnData .h5ad and .zarr stores"
 readme = "README.md"
 requires-python = ">=3.12"