p2: digest with in-sift FIFO, SQLite caches, Honcho context, recover

Dixie is capped (max_inflight 2, queue_depth 8, queue_wait 20s) and
never queued on llama-server. Streaming chat, thinking off, 45s
fallback to clean. Digest and chunk-embedding caches are
content-addressed SQLite (Honcho context is not cached). Recover
uses the guarded Fetcher. guardian-star is refused in code.

vendor/modernc.org/sqlite/Makefile

@@ -0,0 +1,105 @@
+# Copyright 2024 The Sqlite Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+.PHONY:	all build_all_targets clean edit editor test vendor work
+
+# Pinned deduplicator. undup folds byte-identical declarations shared across the
+# per-target generated files in lib/ and vec/ into build-tagged shared files,
+# keeping each tag's module download under Go's 500MB cap. Bump deliberately.
+UNDUP = modernc.org/undup@v0.0.5
+
+all: editor
+	golint 2>&1
+	staticcheck 2>&1
+
+build_all_targets:
+	GOOS=darwin GOARCH=amd64 go test -c -o /dev/null
+	GOOS=darwin GOARCH=amd64 go build -v ./...
+	GOOS=darwin GOARCH=arm64 go test -c -o /dev/null
+	GOOS=darwin GOARCH=arm64 go build -v ./...
+	GOOS=freebsd GOARCH=amd64 go test -c -o /dev/null
+	GOOS=freebsd GOARCH=amd64 go build -v ./...
+	GOOS=freebsd GOARCH=386 go test -c -o /dev/null
+	GOOS=freebsd GOARCH=386 go build -v ./...
+	GOOS=freebsd GOARCH=arm go test -c -o /dev/null
+	GOOS=freebsd GOARCH=arm go build -v ./...
+	GOOS=freebsd GOARCH=arm64 go test -c -o /dev/null
+	GOOS=freebsd GOARCH=arm64 go build -v ./...
+	GOOS=linux GOARCH=386 go test -c -o /dev/null
+	GOOS=linux GOARCH=386 go build -v ./...
+	GOOS=linux GOARCH=amd64 go test -c -o /dev/null
+	GOOS=linux GOARCH=amd64 go build -v ./...
+	GOOS=linux GOARCH=arm go test -c -o /dev/null
+	GOOS=linux GOARCH=arm go build -v ./...
+	GOOS=linux GOARCH=arm64 go test -c -o /dev/null
+	GOOS=linux GOARCH=arm64 go build -v ./...
+	GOOS=linux GOARCH=loong64 go test -c -o /dev/null
+	GOOS=linux GOARCH=loong64 go build -v ./...
+	GOOS=linux GOARCH=ppc64le go test -c -o /dev/null
+	GOOS=linux GOARCH=ppc64le go build -v ./...
+	GOOS=linux GOARCH=riscv64 go test -c -o /dev/null
+	GOOS=linux GOARCH=riscv64 go build -v ./...
+	GOOS=linux GOARCH=s390x go test -c -o /dev/null
+	GOOS=linux GOARCH=s390x go build -v ./...
+	GOOS=netbsd GOARCH=amd64 go test -c -o /dev/null
+	GOOS=netbsd GOARCH=amd64 go build -v ./...
+	GOOS=openbsd GOARCH=amd64 go test -c -o /dev/null
+	GOOS=openbsd GOARCH=amd64 go build -v ./...
+	GOOS=openbsd GOARCH=arm64 go test -c -o /dev/null
+	GOOS=openbsd GOARCH=arm64 go build -v ./...
+	GOOS=windows GOARCH=386 go test -c -o /dev/null
+	GOOS=windows GOARCH=386 go build -v ./...
+	GOOS=windows GOARCH=amd64 go test -c -o /dev/null
+	GOOS=windows GOARCH=amd64 go build -v ./...
+	GOOS=windows GOARCH=arm64 go test -c -o /dev/null
+	GOOS=windows GOARCH=arm64 go build -v ./...
+	echo done
+
+clean:
+	rm -f log-* cpu.test mem.test *.out go.work*
+	go clean
+
+edit:
+	@if [ -f "Session.vim" ]; then gvim -S & else gvim -p Makefile go.mod builder.json all_test.go & fi
+
+editor:
+	go test -c -o /dev/null
+	go build -v  -o /dev/null ./...
+	cd vendor_libs && go build -o /dev/null main.go
+
+test:
+	go test -v -timeout 24h
+	
+vendor:
+	# Reconstruct full per-target files (a no-op the first time), so the freshly
+	# vendored transpiles overwrite a clean tree with no stale shared files.
+	go run $(UNDUP) -expand -dir lib
+	go run $(UNDUP) -expand -dir vec
+	cd vendor_libs && go build -o ../vendor main.go
+	# ../libsqlite3 and ../libsqlite_vec are read one full per-target file at a
+	# time. They ship expanded today, but either may adopt the deduplicated
+	# layout (modernc.org/builder's NW autogen); the tool detects that and
+	# expands a temporary copy, leaving those checkouts untouched. Hence the pin:
+	# one version of record for this repo, wherever undup is invoked.
+	./vendor -undup=$(UNDUP)
+	rm -f vendor
+	# Fold byte-identical declarations back into build-tagged shared files. undup
+	# only touches files carrying the generated-code marker, never hand-written
+	# platform files (libsqlite3_*.go, hooks_*.go, ...).
+	go run $(UNDUP) -dir lib
+	go run $(UNDUP) -dir vec
+	gofmt -s -w lib/sqlite*.go vec/vec*.go
+	make build_all_targets
+
+work:
+	rm -f go.work*
+	go work init
+	go work use .
+	go work use ../cc/v4
+	go work use ../ccgo/v3
+	go work use ../ccgo/v4
+	go work use ../libc
+	go work use ../libtcl8.6
+	go work use ../libsqlite3
+	go work use ../libz