Keep CLI pairings through a lapsed sign-in, pair for the open community, and put buzz on PATH - #3386

…t a bare relay host (#9417)

## Summary

Fixes to `buzz auth desktop pair` and relay selection:

- **`pair` skips desktops that aren't running.** A desktop that exited
without removing its advertisement no longer counts toward "several Buzz
desktops are running". It uses the same running test as `probe`, where
only a transport failure means not running.
- **`--relay` is global**, so `buzz auth desktop pair --relay …` works
and the flag shows in subcommand help.
- **A bare host means `https://`** for `--relay` and `BUZZ_RELAY_URL`.
An explicit `http://`, `ws://` or `wss://` stays as typed.
- **`pair` with no relay sends `[client]`.** The desktop pairs for its
active community and returns the bound relays, which the CLI stores. An
older desktop answers `invalid_request`, which the CLI reports as "this
Buzz can't pick a community; pass --relay".
- **`docs/local-credential-provider.md`**: covers the one-parameter
`pair`, `unavailable` when no community is active, the older-provider
fallback, skipping stale advertisements, and a lapsed sign-in keeping
the pairing instead of revoking it.
- The existing `concurrent_pair_and_unpair…` test now fails after 60s
instead of hanging when the held pair request never reaches the mock
desktop.
- The CLI tests that run the real `lsof` same-user check now take turns.
A nextest test group, `desktop-same-user-check`, serializes the whole
`desktop_provider::` module for the pre-push hook. Most of its tests
reach the check, and the few that don't run serially too. A test-only
lock around the check does the same in `cargo test`. Waiting for a turn
doesn't count against the request timeout. The check and its 5s limit
are unchanged. `list_tells_a_stale_advertisement_from_a_rejection` keeps
the in-cap `retry_after` of 30 and times from the desktop's first
answer, so waiting for a turn isn't counted.

The desktop half is block/buzz-app#3386.

## Testing

- New tests: `pair_skips_a_desktop_that_is_not_running`,
`an_older_desktop_asks_for_a_relay`,
`relay_flag_is_global_and_a_bare_host_means_https`, plus updated
relay-selection cases.
- `cargo test -p buzz-cli --locked -- --test-threads=4` passes: 689
tests, both with default threads and with `--test-threads=4`, and under
the pre-push hook's nextest run.

---------

Signed-off-by: Will Pfleger <[email protected]>
Co-authored-by: Hayt <211b96e6a2b7f45fd4047988976c7bbbeeda0c15f3ae7b32eec20834b5a55118@buzz.block.builderlab.xyz>

Co-authored-by: Sigil <06114f072cf21e50fcd4133ab21346cdb1f74ee16d853a9729995fa6c03a251c@buzz.block.builderlab.xyz>

* commit '05433fe4af186eeccd85c912f9e60e96b9123232':
  fix(mentions): don't let outside names block a member's exact @name (block#3254)
  ci(release): stop scheduled desktop preview builds (block#3425)
  Keep CLI pairings through a lapsed sign-in, pair for the open community, and put buzz on PATH (block#3386)
  fix(claude-code): look up the model list again once it is an hour old (block#3398)

Signed-off-by: LordMelkor <[email protected]>

* origin/main:
  Keep deleted agents out of pickers; Delete always archives (block#3418)
  fix(mentions): don't let outside names block a member's exact @name (block#3254)
  ci(release): stop scheduled desktop preview builds (block#3425)
  Keep CLI pairings through a lapsed sign-in, pair for the open community, and put buzz on PATH (block#3386)
  fix(claude-code): look up the model list again once it is an hour old (block#3398)
  feat(plugins): let a plugin wake an agent at a channel's top level (block#3299)
  Enable mouse drag scrolling in the agent avatar picker (block#3401)

Signed-off-by: Laura Knight <[email protected]>

# Conflicts:
#	docs/plugin-authoring-guide.md

Co-authored-by: Sigil <06114f072cf21e50fcd4133ab21346cdb1f74ee16d853a9729995fa6c03a251c@buzz.block.builderlab.xyz>

* commit '05433fe4af186eeccd85c912f9e60e96b9123232':
  fix(mentions): don't let outside names block a member's exact @name (block#3254)
  ci(release): stop scheduled desktop preview builds (block#3425)
  Keep CLI pairings through a lapsed sign-in, pair for the open community, and put buzz on PATH (block#3386)
  fix(claude-code): look up the model list again once it is an hour old (block#3398)

Signed-off-by: LordMelkor <[email protected]>

Co-authored-by: Sigil <06114f072cf21e50fcd4133ab21346cdb1f74ee16d853a9729995fa6c03a251c@buzz.block.builderlab.xyz>

* commit '05433fe4af186eeccd85c912f9e60e96b9123232':
  fix(mentions): don't let outside names block a member's exact @name (block#3254)
  ci(release): stop scheduled desktop preview builds (block#3425)
  Keep CLI pairings through a lapsed sign-in, pair for the open community, and put buzz on PATH (block#3386)
  fix(claude-code): look up the model list again once it is an hour old (block#3398)

Signed-off-by: LordMelkor <[email protected]>

Co-authored-by: Sigil <06114f072cf21e50fcd4133ab21346cdb1f74ee16d853a9729995fa6c03a251c@buzz.block.builderlab.xyz>

* commit '05433fe4af186eeccd85c912f9e60e96b9123232':
  fix(mentions): don't let outside names block a member's exact @name (block#3254)
  ci(release): stop scheduled desktop preview builds (block#3425)
  Keep CLI pairings through a lapsed sign-in, pair for the open community, and put buzz on PATH (block#3386)
  fix(claude-code): look up the model list again once it is an hour old (block#3398)

Signed-off-by: LordMelkor <[email protected]>

Moves the fleet's mesh-llm to MeshLLM 0.79.0 and buzz-app's Shared
compute with it. Both speak skippy stage generation 16 now, so buzz-app
can split models with the fleet's mesh-llm nodes again.

- **mesh-llm** → `kleinbem/nixpkgs@ddb90897` (mesh-llm-dev:
NixOS/nixpkgs#571722 at 0.79.0 plus its follow-ups). Same attrs, paths
and module as before.
- **buzz-app** → `kleinbem/nixpkgs@00a55a67` (branch
`buzz-app-trial-0790`, on that same mesh-llm commit). It builds Block's
own 0.79 move, block/buzz-app#3271 at `058e300d`, with no patch of mine.
Two changes for current nixpkgs: `aws-lc` and `sqlite` in buildInputs
(the cargo hooks now link both from the system). One new test skip:
`cli_link::tests::only_the_installed_release_owns_the_link` asserts a
debug build, and nixpkgs tests in the release profile (added in
block/buzz-app#3386).

Checked:
- nixpkgs-review-gha, x86_64-linux: mesh-llm (43369399492),
skippy-native-runtime-vulkan (43369413074), skippy-tools (43369424969)
and nixosTests.mesh-llm (43369437043) built; buzz-app with its full test
suite (43376192753) built.
- In this flake, buzz-app and mesh-llm use the same two
`skippy-native-runtime-0.79.0` derivations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

<!-- coderabbit-ai-generated:v1 -->

## Summary by CodeRabbit

* **Chores**
  * Updated the pinned versions of Buzz App and Mesh LLM.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: Claude Opus 5.5 <[email protected]>

Moves buzz-app to `kleinbem/nixpkgs@59d494b6`, which stops the app from
linking `~/.local/bin/buzz` to its bundled CLI (added in
block/buzz-app#3386). Under Nix that link points into the store and, on
Linux, keeps the first installed version until it's garbage-collected.
The `buzz` command comes from nixpkgs' `buzz-cli` instead. mesh-llm is
unchanged.

Checked: nixpkgs-review-gha run 43431218322 built buzz-app with its full
test suite on x86_64-linux; this flake's buzz-app is that same
derivation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

<!-- coderabbit-ai-generated:v1 -->

## Summary by CodeRabbit

* **Chores**
* Updated the packaged version of buzz-app to a newer revision. No
user-facing feature changes are included in this update.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: Claude Opus 5.5 <[email protected]>