microsoft/wassette v0.7.0

v0.7.0

Repository: microsoft/wassette

Tag: v0.7.0

Published: 2026-08-29T01:44:30Z

Prerelease: no

Release notes:

Highlights

MCP protocol and serving

• Streamable HTTP now supports the stateless MCP lifecycle from protocol revision 2026-07-28, alongside the existing session-based lifecycle, with optional JSON responses and a subscription stream for tool-list changes (#759).
• Deployments can configure the Streamable HTTP Host allowlist through --allowed-host, WASSETTE_ALLOWED_HOSTS, or config.toml, while the secure loopback-only default remains unchanged (#757).
• serve --manifest can opt into degraded startup with --continue-on-provisioning-failure, serving components that provisioned successfully while reporting those that did not (#785).

Component provisioning and tools

• Manifest-declared policies are now attached to the component they were synthesized for, so declared network permissions work instead of failing closed with an empty allowlist (#777).
• Manifest entries can explicitly declare no permissions, and the worked manifest examples are valid and documented (#780, #784).
• run and serve now honor the global --component-dir, keeping startup restoration and later component operations on the same directory (#767).
• Cached tools restored during startup retain their names, descriptions, input schemas, and callable identities while components compile in the background (#788).
• Tool-name collisions are reported when components register, before the first ambiguous call fails (#786).
• Component load failures preserve their full cause chain across the CLI, MCP responses, logs, and manifest provisioning (#782).

Examples

• The get-weather-js and get-open-meteo-weather-js examples now import wasi:config/store@0.2.0-rc.1, matching the host runtime (#781).
• arxiv-rs once again exports its three component functions after regenerating its WIT bindings (#787).
• Release publishing no longer includes the unpublished context7-rs example, and main-branch example builds now move the latest tag as documented (#773, #783).

Release engineering

• A new opt-in latest prerelease channel builds any commit into six immutable platform assets without changing what stable installers resolve (#769).
• Release builds use a shared matrix workflow, channel retention prunes by publication time, and the release process is documented end to end (#768, #775, #776).
• MCP client and Inspector harnesses now cover both protocol generations and the documented terminal clients (#759, #774).
• Coverage runs once instead of twice, and Rust caches can fall back to partial restores (#758, #778, #779).

Installation

• The installer no longer rejects supported Bash shells whose executable path is not literally /bin/bash (#766).

Breaking changes

• mcp_server::handle_resources_list no longer accepts an unused serde_json::Value request argument. Library callers should remove that argument (#759).

What's Changed

• feat(serve): make the Streamable HTTP Host allowlist configurable by @asw101 in https://github.com/microsoft/wassette/pull/757
• Increase recursion limit for nightly coverage job compilation by @asw101 in https://github.com/microsoft/wassette/pull/758
• feat(serve): serve the stateless MCP lifecycle from protocol revision 2026-07-28 by @asw101 in https://github.com/microsoft/wassette/pull/759
• fix(install): stop reporting bash as an unsupported shell by @asw101 in https://github.com/microsoft/wassette/pull/766
• fix(cli): honour the global --component-dir in run and serve by @asw101 in https://github.com/microsoft/wassette/pull/767
• refactor(ci): extract the release build matrix into a reusable workflow by @asw101 in https://github.com/microsoft/wassette/pull/768
• chore: update winget and homebrew for v0.6.0 by @asw101 in https://github.com/microsoft/wassette/pull/772
• feat(ci): add a latest channel of on-demand prereleases built from any commit by @asw101 in https://github.com/microsoft/wassette/pull/769
• chore(examples): stop publishing the context7-rs example component by @asw101 in https://github.com/microsoft/wassette/pull/773
• fix(ci): prune channel builds by publish time, not commit date by @asw101 in https://github.com/microsoft/wassette/pull/775
• docs(release): document the latest channel and the reusable build workflow by @asw101 in https://github.com/microsoft/wassette/pull/776
• test(mcp): add an on-demand harness for the documented terminal clients by @asw101 in https://github.com/microsoft/wassette/pull/774
• fix: serve --manifest never attaches the policy it synthesizes by @asw101 in https://github.com/microsoft/wassette/pull/777
• fix(ci): run the instrumented coverage suite once, not twice by @asw101 in https://github.com/microsoft/wassette/pull/778
• fix(ci): let the rust cache fall back to a partial restore by @asw101 in https://github.com/microsoft/wassette/pull/779
• fix(examples): move wasi:config imports from 0.2.0-draft to 0.2.0-rc.1 by @asw101 in https://github.com/microsoft/wassette/pull/781
• fix(errors): keep the cause of a component load failure visible by @asw101 in https://github.com/microsoft/wassette/pull/782
• fix: allow a manifest entry to declare no permissions by @asw101 in https://github.com/microsoft/wassette/pull/780
• fix(ci): move :latest when examples are published from main by @asw101 in https://github.com/microsoft/wassette/pull/783
• fix(examples): make the provisioning manifests usable as written, and document the format by @asw101 in https://github.com/microsoft/wassette/pull/784
• feat(serve): add --continue-on-provisioning-failure to serve a degraded manifest by @asw101 in https://github.com/microsoft/wassette/pull/785
• feat(registry): warn when two loaded components export the same tool name by @asw101 in https://github.com/microsoft/wassette/pull/786
• fix(examples): regenerate arxiv-rs bindings so the component exports its functions by @asw101 in https://github.com/microsoft/wassette/pull/787
• fix(schema): preserve cached tool metadata during startup by @asw101 in https://github.com/microsoft/wassette/pull/788
• chore(release): bump version to 0.7.0 by @asw101 in https://github.com/microsoft/wassette/pull/789
• feat(release): support curated release highlights by @asw101 in https://github.com/microsoft/wassette/pull/790

Full Changelog: https://github.com/microsoft/wassette/compare/v0.6.0...v0.7.0

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