release: bump to 1.1.0 and write the CHANGELOG

CHANGELOG.md

@@ -3,6 +3,83 @@
 All notable changes to colibrì are documented here.
 Format follows [Keep a Changelog](https://keepachangelog.com/).
 
+## [1.1.0] — 2026-07-22
+
+A community release. 27 pull requests from more than 20 contributors, 216 commits since
+v1.0.0. Most of what follows was found, measured, or fixed by people who do not work on
+this project and had nothing to gain from it.
+
+### Added
+
+- **AMD GPU support (HIP/ROCm)** (#339) — single-source `backend_gpu_compat.h` with a WMMA
+  dispatch gate, so one codebase builds for CUDA and HIP. Validated on an RX 9070 XT
+  (RDNA4, ROCm 7.2): token-exact against CPU on a real fmt=4 gs64 container, with resident
+  dense *and* with routed experts in VRAM, plus a fail-injection control proving the GPU
+  actually executed the work.
+- **Dual-SSD streaming** (`COLI_MODEL_MIRROR`, #421) — read the model from two drives at
+  once, roughly doubling streaming bandwidth on a disk-bound host.
+- **N-drive shard split** (`COLI_MODEL_DIRS`, #469) — capacity aggregation: run a container
+  no single drive can hold, spread across several with no duplication.
+- **fmt=5 (int3-g64)** (#168) — 3-bit weights with per-64 group scales: measured 3.3x lower
+  outlier-row error than per-row int4 at 25% fewer bytes.
+- **fmt=6 (E8/IQ3 lattice)** (#465) — CPU decode kernel and dispatch; index codec tooling (#458).
+- **`tools/try_tool_calling.py`** — dependency-free two-turn tool-calling probe that doubles
+  as a smoke test.
+
+### Fixed
+
+- **Tool calling in coding clients** (#401), root cause found, in two parts:
+  - **#506** — the engine capped prompt encoding at `CTX-2`, and the tokenizer stops dead at
+    its limit *without reporting anything*. A prompt longer than the context was therefore
+    silently truncated to its first `CTX-2` tokens and answered anyway. With the 4096 default
+    that is 4094 — exactly the `prefill 4094` in the field report. The dropped tail was the
+    tool instructions and the user's actual turn, so the model emitted a bare `<` and stopped;
+    and because clients append to the *end* while truncation keeps the *head*, every retry
+    re-sent a byte-identical prompt. Now refused with a 400 `context_length_exceeded`.
+  - **#505** — a tool call whose closing `</tool_call>` never arrived was dropped whole,
+    because the parser required both tags. Now recovered when unambiguous, on both the
+    streamed and non-streamed paths.
+  - **#437** — non-EOS role markers were armed as hard stops in serve mode and cut generation
+    the instant a tool block started.
+- **Grouped-int4 (fmt=4) produced garbage output on CUDA** with `CUDA_DENSE=1` (#298) — the
+  dense and attention kernels applied per-group scales as if they were per-row. Hardware-verified.
+- **OpenMP tuning re-exec preserved the CPU affinity mask** (#476), jailing every thread onto
+  one core when `OMP_PROC_BIND`/`OMP_PLACES` were set: roughly a 20x slowdown.
+- **Pilot eviction guard dropped ~100% of speculations** once the cache filled (#497),
+  collapsing `PILOT_REAL` to a hint-only path.
+- **Silent budget clamp** capped the CUDA expert tier at ~109 experts regardless of
+  `CUDA_EXPERT_GB` (#495).
+- fmt=4 guard at the per-row-only CUDA entry points (#464/#470); `COLI_CUDA_MTP=1` and
+  `COLI_CUDA=0` are now honoured over implicit defaults (#468).
+
+### Security
+
+Threat model: model files come from mirrors that are not trusted.
+
+- **#368** — server hardening, JSON and tokenizer parser hardening, build flags, downloader
+  and dependency pinning.
+- **#413** — the quant layout is resolved *and* validated against the on-disk byte counts
+  (unknown layouts are refused rather than falling through to int2), shape-product overflow
+  is rejected, and the olmoe dtype-3 path no longer trusts a crafted `nbytes` (heap overflow).
+
+### Performance — all byte-identical
+
+- **#481** +4.7x on the MLA-absorb score and value-mix reductions
+- **#477** +13% decode on AVX-512 (`qt_addrow` / `qt_matvec_rows`)
+- **#475** +11.6% with opt-in `XEXP=1` (one OpenMP region per expert block at S=1 full residency)
+- **#473** +5.5% int4 IDOT at S=1 on AVX-512 VNNI
+
+### Changed
+
+- `glm.c` is now `colibri.c` plus header modules (#391); `make glm` remains as an alias.
+- Serve stage 2 (#192): `response_format`, per-request grammars, grammar-forced drafts.
+
+### Upgrade notes
+
+- **`CTX` still defaults to 4096.** Coding clients send far more than that in a single system
+  prompt. Use `CTX=32768`. Before this release an over-long prompt was silently truncated;
+  now you get a clear 400 instead.
+
 ## [1.0.0] — 2026-07-19
 
 First tagged release. The engine has been running in production since late June

c/version.py

@@ -1,3 +1,3 @@
 """Single source of truth for the colibrì version number."""
 
-__version__ = "1.0.0"
+__version__ = "1.1.0"