Ladda ner MicroClaw 0.28.0

The Matrix channel is removed, and security advisories are fixed. Matrix
went because its SDK pinned a vulnerable SQLite for every product built
from this repository, and nothing showed that anyone used it.
Removed
- The Matrix channel (channel-matrix), the full Cargo feature and
the microclaw-full release archives, Homebrew formula, install.sh --full and install.ps1 -Full variant. The full variant differed from
the default build only by Matrix. A channels.matrix block in an existing
config is ignored with a warning. In the Homebrew tap, microclaw-full
now renames to microclaw, so brew update moves existing installs over.
--full and -Full are still accepted by the install scripts and only
print a notice.
Security
- rusqlite 0.41 (from 0.40), which bundles SQLite 3.54.1 through
libsqlite3-sys 0.39.1, for RUSTSEC-2026-0459 (CVE-2026-119375): SQLite
before 3.54.0 could return uninitialized page-cache memory for a database
opened with a crafted -wal file. Every product bundles SQLite, so all
were affected; the Matrix SDK's pin on rusqlite 0.40 blocked the
upgrade until the channel was removed. Six cargo deny exceptions that
only applied to Matrix's dependencies are gone too.
- rmcp 3.9 (from 1.8) for RUSTSEC-2026-0462: the MCP Streamable HTTP
client read response bodies with no size limit, so a malicious or
compromised MCP server could exhaust memory, even during initialize.
Successful JSON bodies are now capped at 16 MiB and error bodies at
64 KiB. Affects the Server, MicroClaw Code and the SDK wherever HTTP MCP
servers are configured.
- openssl 0.10.82 (from 0.10.76) for RUSTSEC-2026-0463, an out-of-bounds
write in aes::unwrap_key; it reaches the build through native-tls.