Merge origin/dev into #1944: the Raft relay, two-computer fixes and furrow v0.3.4

Brings the workspace-ownership branch up to dev cf282dd, which adds the
Raft relay (#1950), the two-computer fixes (#1967), #1972, #1974 and #1976.

- directory record types are now clusterstate aliases, so frame hints move
  into the replicated state machine: FrameHint and the frame_hints field on
  Cell, CellInit and Publish, bounded deterministically in the shared rules,
  dropped from listings and kept on single-cell reads. Signed v1 publishes
  with hints are accepted; unknown fields are still refused; existing
  canonical bytes are unchanged and no schema or protocol version moves.
- every take path records the send lease, including the workspace-set and
  identity-adopting restores; an already-held chat keeps its hold when the
  record fails.
- a removed computer cannot take through the folder-mapping road either, and
  unsent words and the pending send survive the root chooser.
- the seal refuses a folder holding home before taking the checkpoint lock.
- furrow pin follows dev at v0.3.4, which contains v0.3.2's non-mutating
  SQLite capture.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: AbirAbbas

.gitignore

@@ -2,7 +2,9 @@ bin/
 # The furrow the build fetches, and the copy it stages for go:embed. Both are
 # six megabytes of somebody else's release; internal/furrowbin/pin.json is the
 # committed, auditable half and these are rebuilt from it by `make furrow`.
-third_party/
+third_party/*
+!third_party/raft/
+!third_party/raft-patch/
 internal/furrowbin/cache/furrow-*.gz
 .obs/
 *.log
@@ -51,3 +53,6 @@ relay/hosted/.wrangler/
 
 # Native Windows test executables are local acceptance artifacts.
 .wintest/
+
+# The hosted reactor is generated from the shared, pinned Go core.
+/relay/hosted/src/raft/core.wasm

PERF.md

@@ -83,6 +83,28 @@ migration flag skips that check. `BenchmarkOpenSettledSessions` measures the
 whole public open/close operation. `TestSettledStoreTerminalStartup` separates
 fixture construction from the first interactive frame of the running terminal.
 
+Furrow detection stays off the hello path. The belt reads the remembered answer
+(`furrow.PeekTools`); the session asks furrow from a goroutine joined at close
+and appends the four workspace tools through `armFamily` if the folder is
+watched. Measured on Spark linux-arm64 with a cold engine per workspace and the
+owner profile, first frame fell from 3.87 s to about 0.5 s with the furrow
+that was embedded then; with furrow 0.3.3's fast status the unfixed tree is already
+at about 0.43 s, and this change keeps the build from depending on furrow's speed. The gate is
+`TestBuildingASessionDoesNotWaitForFurrow`, which holds `furrow status` open and
+asserts the build came back while that process was still alive; no clock decides it.
+
+Native peer acknowledgements reuse the validated routing view only for the same
+store and durably applied index. Every applied change, including revocation,
+invalidates that view. `TestR11R27UnchangedPeerAcknowledgementWork` exercises the
+real transport and caps an unchanged acknowledgement at 1,000 allocations with
+no application append; the measured cost fell from 3,273 allocations to 192.
+
+An authenticated native directory read with already durable ingress time uses a
+fresh quorum view and the normal state evaluator before omitting an identical
+append. New time and changed records still commit before inspection.
+`TestR4R26R27ReadCommitsOnlyChangedTime` counts applied entries for unchanged,
+advanced and repeated time, and requires invalid original authority to fail.
+
 ## What the gates check
 
 `make test-quick` checks compilation, vet, formatting, packed manuals, change
@@ -108,3 +130,10 @@ artifact. The reference target is darwin/amd64 with its own pinned artifact stag
 other platforms can have different absolute sizes. Reduce unnecessary code, data
 or dependencies first. A justified cap adjustment belongs in the same change as
 the feature and its measurements; keep `SIZE-BUDGET` explicit and reviewable.
+
+Every build links the Raft coordination core: the modified Raft copy, protobuf,
+the signed state machine and its SQLite snapshot host. The relay and devices
+always coordinate through it, so no build leaves it out. On linux/amd64 it adds
+3,379,200 bytes to the stripped binary (75,755,785 to 79,134,985 on the same dev
+base), and the cap moves by the same amount, from 75,811,848 to 79,191,048, so
+the 56,063 bytes of headroom the base had are kept.

SIZE-BUDGET

@@ -1 +1 @@
-75811848
+79191048

THIRD-PARTY-NOTICES.md

@@ -2873,6 +2873,220 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 ```
 
+## go.etcd.io/raft/v3
+
+- Version: v3.7.0
+- Licence: Apache-2.0
+
+The Apache-2.0 Raft source is a modified copy in `third_party/raft`: codeaf injects per-node election randomness for deterministic replay. The pinned upstream version, patch and licence are retained there.
+
+### LICENSE
+
+```text
+
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+```
+
 ## go.yaml.in/yaml/v4
 
 - Version: v4.0.0-rc.2
@@ -3436,6 +3650,70 @@ rights granted to you under this License for this implementation of Go
 shall terminate as of the date such litigation is filed.
 ```
 
+## google.golang.org/protobuf
+
+- Version: v1.36.11
+- Licence: BSD-3-Clause with the Go PATENTS grant
+
+### LICENSE
+
+```text
+Copyright (c) 2018 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+```
+
+### PATENTS
+
+```text
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.
+```
+
 ## gopkg.in/yaml.v3
 
 - Version: v3.0.1

cmd/codeaf-demo-home/seed.go

@@ -285,7 +285,7 @@ func initRepository(dir string, now time.Time) error {
 		{"add", "."},
 		{"-c", "user.name=Demo", "-c", "user.email=demo@example.invalid", "commit", "--quiet", "-m", "the first commit"},
 	} {
-		command := exec.Command("git", append([]string{"-C", dir}, argv...)...)
+		command := exec.Command("git", append([]string{"--no-optional-locks", "-C", dir}, argv...)...)
 		command.Env = append(os.Environ(),
 			"GIT_AUTHOR_DATE="+stamp, "GIT_COMMITTER_DATE="+stamp,
 			// A demo home must not inherit the machine's git configuration: