FastLED · zackees · Jul 9, 2026 · Jul 9, 2026
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -5,6 +5,9 @@ members = [
     "crates/fbuild-config",
     "crates/fbuild-paths",
     "crates/fbuild-packages",
+    "crates/fbuild-packages-fetch",
+    "crates/fbuild-library",
+    "crates/fbuild-toolchain",
     "crates/fbuild-serial",
     "crates/fbuild-build",
     "crates/fbuild-build-engine",

diff --git a/ci/check_workspace_crates.py b/ci/check_workspace_crates.py
@@ -42,6 +42,11 @@
         "crates/fbuild-config",
         "crates/fbuild-paths",
         "crates/fbuild-packages",
+        # FastLED/fbuild#1008 Phase B: fetch-primitives + parallel library /
+        # toolchain crates behind the fbuild-packages facade.
+        "crates/fbuild-packages-fetch",
+        "crates/fbuild-library",
+        "crates/fbuild-toolchain",
         "crates/fbuild-serial",
         "crates/fbuild-build",
         # FastLED/fbuild#1008: compile-parallelism split — shared build engine

diff --git a/ci/hooks/crate_guard.py b/ci/hooks/crate_guard.py
@@ -48,6 +48,11 @@
         "crates/fbuild-config",
         "crates/fbuild-paths",
         "crates/fbuild-packages",
+        # FastLED/fbuild#1008 Phase B: fetch-primitives + parallel library /
+        # toolchain crates behind the fbuild-packages facade.
+        "crates/fbuild-packages-fetch",
+        "crates/fbuild-library",
+        "crates/fbuild-toolchain",
         "crates/fbuild-serial",
         "crates/fbuild-build",
         # FastLED/fbuild#1008: compile-parallelism split of fbuild-build into a

diff --git a/crates/fbuild-library/Cargo.toml b/crates/fbuild-library/Cargo.toml
@@ -0,0 +1,39 @@
+[package]
+name = "fbuild-library"
+description = "Library resolution + management for fbuild (parallel with fbuild-toolchain). FastLED/fbuild#1008."
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+# Not published to crates.io — internal compile-parallelism split. FastLED/fbuild#1008.
+publish = false
+
+[dependencies]
+fbuild-packages-fetch = { path = "../fbuild-packages-fetch" }
+fbuild-core = { path = "../fbuild-core" }
+fbuild-paths = { path = "../fbuild-paths" }
+fbuild-config = { path = "../fbuild-config" }
+async-trait = { workspace = true }
+tokio = { workspace = true }
+reqwest = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+tracing = { workspace = true }
+tempfile = { workspace = true }
+sha2 = { workspace = true }
+flate2 = { workspace = true }
+tar = { workspace = true }
+zip = { workspace = true }
+xz2 = { workspace = true }
+bzip2 = { workspace = true }
+zstd = { workspace = true }
+semver = { workspace = true }
+rusqlite = { workspace = true }
+walkdir = { workspace = true }
+prost = { workspace = true }
+
+[dev-dependencies]
+tempfile = { workspace = true }
+axum = { workspace = true }
+tokio = { workspace = true }
diff --git a/crates/fbuild-library/README.md b/crates/fbuild-library/README.md
@@ -0,0 +1,3 @@
+# fbuild-library
+
+Extracted from `fbuild-packages` for compile parallelism (FastLED/fbuild#1008 Phase B). Re-exported by the `fbuild-packages` facade at unchanged paths.
diff --git a/crates/fbuild-packages/assets/README.md → crates/fbuild-library/assets/README.md b/crates/fbuild-packages/assets/README.md → crates/fbuild-library/assets/README.md
diff --git a/...build-packages/assets/avr_frameworks.json → ...fbuild-library/assets/avr_frameworks.json b/...build-packages/assets/avr_frameworks.json → ...fbuild-library/assets/avr_frameworks.json
diff --git a/crates/fbuild-library/src/lib.rs b/crates/fbuild-library/src/lib.rs
@@ -0,0 +1,8 @@
+//! Library resolution + management for fbuild (FastLED/fbuild#1008 Phase B).
+//!
+//! Re-exports the `fbuild-packages-fetch` base (primitives + Package traits) at
+//! the crate root so `library`'s `crate::Package` / `crate::cache::…` paths
+//! resolve unchanged. Re-exported by the `fbuild-packages` facade.
+pub use fbuild_packages_fetch::*;
+
+pub mod library;
diff --git a/crates/fbuild-packages/src/library/README.md → crates/fbuild-library/src/library/README.md b/crates/fbuild-packages/src/library/README.md → crates/fbuild-library/src/library/README.md
diff --git a/...uild-packages/src/library/apollo3_core.rs → ...build-library/src/library/apollo3_core.rs b/...uild-packages/src/library/apollo3_core.rs → ...build-library/src/library/apollo3_core.rs
diff --git a/...build-packages/src/library/arduino_api.rs → ...fbuild-library/src/library/arduino_api.rs b/...build-packages/src/library/arduino_api.rs → ...fbuild-library/src/library/arduino_api.rs
diff --git a/...uild-packages/src/library/arduino_core.rs → ...build-library/src/library/arduino_core.rs b/...uild-packages/src/library/arduino_core.rs → ...build-library/src/library/arduino_core.rs
diff --git a/...ckages/src/library/arduino_core_lpc8xx.rs → ...ibrary/src/library/arduino_core_lpc8xx.rs b/...ckages/src/library/arduino_core_lpc8xx.rs → ...ibrary/src/library/arduino_core_lpc8xx.rs
diff --git a/...packages/src/library/arduino_mbed_core.rs → ...-library/src/library/arduino_mbed_core.rs b/...packages/src/library/arduino_mbed_core.rs → ...-library/src/library/arduino_mbed_core.rs
diff --git a/...build-packages/src/library/attiny_core.rs → ...fbuild-library/src/library/attiny_core.rs b/...build-packages/src/library/attiny_core.rs → ...fbuild-library/src/library/attiny_core.rs
diff --git a/...ild-packages/src/library/avr_framework.rs → ...uild-library/src/library/avr_framework.rs b/...ild-packages/src/library/avr_framework.rs → ...uild-library/src/library/avr_framework.rs
diff --git a/...fbuild-packages/src/library/ch32v_core.rs → .../fbuild-library/src/library/ch32v_core.rs b/...fbuild-packages/src/library/ch32v_core.rs → .../fbuild-library/src/library/ch32v_core.rs
diff --git a/...build-packages/src/library/cmsis_atmel.rs → ...fbuild-library/src/library/cmsis_atmel.rs b/...build-packages/src/library/cmsis_atmel.rs → ...fbuild-library/src/library/cmsis_atmel.rs
diff --git a/...d-packages/src/library/cmsis_framework.rs → ...ld-library/src/library/cmsis_framework.rs b/...d-packages/src/library/cmsis_framework.rs → ...ld-library/src/library/cmsis_framework.rs
diff --git a/...ges/src/library/esp32_framework/README.md → ...ary/src/library/esp32_framework/README.md b/...ges/src/library/esp32_framework/README.md → ...ary/src/library/esp32_framework/README.md
diff --git a/...s/src/library/esp32_framework/fs_utils.rs → ...y/src/library/esp32_framework/fs_utils.rs b/...s/src/library/esp32_framework/fs_utils.rs → ...y/src/library/esp32_framework/fs_utils.rs
diff --git a/...kages/src/library/esp32_framework/libs.rs → ...brary/src/library/esp32_framework/libs.rs b/...kages/src/library/esp32_framework/libs.rs → ...brary/src/library/esp32_framework/libs.rs
diff --git a/...ckages/src/library/esp32_framework/mod.rs → ...ibrary/src/library/esp32_framework/mod.rs b/...ckages/src/library/esp32_framework/mod.rs → ...ibrary/src/library/esp32_framework/mod.rs
diff --git a/...es/src/library/esp32_framework/parsing.rs → ...ry/src/library/esp32_framework/parsing.rs b/...es/src/library/esp32_framework/parsing.rs → ...ry/src/library/esp32_framework/parsing.rs
diff --git a/...ages/src/library/esp32_framework/paths.rs → ...rary/src/library/esp32_framework/paths.rs b/...ages/src/library/esp32_framework/paths.rs → ...rary/src/library/esp32_framework/paths.rs
diff --git a/.../src/library/esp32_framework/sdk_paths.rs → .../src/library/esp32_framework/sdk_paths.rs b/.../src/library/esp32_framework/sdk_paths.rs → .../src/library/esp32_framework/sdk_paths.rs
diff --git a/...ages/src/library/esp32_framework/tests.rs → ...rary/src/library/esp32_framework/tests.rs b/...ages/src/library/esp32_framework/tests.rs → ...rary/src/library/esp32_framework/tests.rs
diff --git a/...ld-packages/src/library/esp32_platform.rs → ...ild-library/src/library/esp32_platform.rs b/...ld-packages/src/library/esp32_platform.rs → ...ild-library/src/library/esp32_platform.rs
diff --git a/...packages/src/library/esp8266_framework.rs → ...-library/src/library/esp8266_framework.rs b/...packages/src/library/esp8266_framework.rs → ...-library/src/library/esp8266_framework.rs
diff --git a/...es/fbuild-packages/src/library/esptool.rs → crates/fbuild-library/src/library/esptool.rs b/...es/fbuild-packages/src/library/esptool.rs → crates/fbuild-library/src/library/esptool.rs
diff --git a/...packages/src/library/framework_library.rs → ...-library/src/library/framework_library.rs b/...packages/src/library/framework_library.rs → ...-library/src/library/framework_library.rs
diff --git a/...-packages/src/library/library_compiler.rs → ...d-library/src/library/library_compiler.rs b/...-packages/src/library/library_compiler.rs → ...d-library/src/library/library_compiler.rs
diff --git a/...ackages/src/library/library_downloader.rs → ...library/src/library/library_downloader.rs b/...ackages/src/library/library_downloader.rs → ...library/src/library/library_downloader.rs
diff --git a/...uild-packages/src/library/library_info.rs → ...build-library/src/library/library_info.rs b/...uild-packages/src/library/library_info.rs → ...build-library/src/library/library_info.rs
diff --git a/...d-packages/src/library/library_manager.rs → ...ld-library/src/library/library_manager.rs b/...d-packages/src/library/library_manager.rs → ...ld-library/src/library/library_manager.rs
diff --git a/...uild-packages/src/library/library_spec.rs → ...build-library/src/library/library_spec.rs b/...uild-packages/src/library/library_spec.rs → ...build-library/src/library/library_spec.rs
diff --git a/crates/fbuild-packages/src/library/mod.rs → crates/fbuild-library/src/library/mod.rs b/crates/fbuild-packages/src/library/mod.rs → crates/fbuild-library/src/library/mod.rs
diff --git a/...fbuild-packages/src/library/nrf52_core.rs → .../fbuild-library/src/library/nrf52_core.rs b/...fbuild-packages/src/library/nrf52_core.rs → .../fbuild-library/src/library/nrf52_core.rs
diff --git a/...s/fbuild-packages/src/library/registry.rs → ...es/fbuild-library/src/library/registry.rs b/...s/fbuild-packages/src/library/registry.rs → ...es/fbuild-library/src/library/registry.rs
diff --git a/...uild-packages/src/library/renesas_core.rs → ...build-library/src/library/renesas_core.rs b/...uild-packages/src/library/renesas_core.rs → ...build-library/src/library/renesas_core.rs
diff --git a/...build-packages/src/library/rp2040_core.rs → ...fbuild-library/src/library/rp2040_core.rs b/...build-packages/src/library/rp2040_core.rs → ...fbuild-library/src/library/rp2040_core.rs
diff --git a/...s/fbuild-packages/src/library/sam_core.rs → ...es/fbuild-library/src/library/sam_core.rs b/...s/fbuild-packages/src/library/sam_core.rs → ...es/fbuild-library/src/library/sam_core.rs
diff --git a/.../fbuild-packages/src/library/samd_core.rs → ...s/fbuild-library/src/library/samd_core.rs b/.../fbuild-packages/src/library/samd_core.rs → ...s/fbuild-library/src/library/samd_core.rs
diff --git a/...build-packages/src/library/silabs_core.rs → ...fbuild-library/src/library/silabs_core.rs b/...build-packages/src/library/silabs_core.rs → ...fbuild-library/src/library/silabs_core.rs
diff --git a/...fbuild-packages/src/library/stm32_core.rs → .../fbuild-library/src/library/stm32_core.rs b/...fbuild-packages/src/library/stm32_core.rs → .../fbuild-library/src/library/stm32_core.rs
diff --git a/...build-packages/src/library/teensy_core.rs → ...fbuild-library/src/library/teensy_core.rs b/...build-packages/src/library/teensy_core.rs → ...fbuild-library/src/library/teensy_core.rs
diff --git a/crates/fbuild-packages-fetch/Cargo.toml b/crates/fbuild-packages-fetch/Cargo.toml
@@ -0,0 +1,38 @@
+[package]
+name = "fbuild-packages-fetch"
+description = "Fetch primitives (http, download, extract, cache, disk-cache) + Package/Toolchain/Framework base traits for fbuild. FastLED/fbuild#1008."
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+# Not published to crates.io — internal compile-parallelism split. FastLED/fbuild#1008.
+publish = false
+
+[dependencies]
+fbuild-core = { path = "../fbuild-core" }
+fbuild-paths = { path = "../fbuild-paths" }
+fbuild-config = { path = "../fbuild-config" }
+async-trait = { workspace = true }
+tokio = { workspace = true }
+reqwest = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+tracing = { workspace = true }
+tempfile = { workspace = true }
+sha2 = { workspace = true }
+flate2 = { workspace = true }
+tar = { workspace = true }
+zip = { workspace = true }
+xz2 = { workspace = true }
+bzip2 = { workspace = true }
+zstd = { workspace = true }
+semver = { workspace = true }
+rusqlite = { workspace = true }
+walkdir = { workspace = true }
+prost = { workspace = true }
+
+[dev-dependencies]
+tempfile = { workspace = true }
+axum = { workspace = true }
+tokio = { workspace = true }
diff --git a/crates/fbuild-packages-fetch/README.md b/crates/fbuild-packages-fetch/README.md
@@ -0,0 +1,3 @@
+# fbuild-packages-fetch
+
+Extracted from `fbuild-packages` for compile parallelism (FastLED/fbuild#1008 Phase B). Re-exported by the `fbuild-packages` facade at unchanged paths.
diff --git a/crates/fbuild-packages/src/cache.rs → crates/fbuild-packages-fetch/src/cache.rs b/crates/fbuild-packages/src/cache.rs → crates/fbuild-packages-fetch/src/cache.rs
diff --git a/crates/fbuild-packages/src/cache_archive.rs → ...build-packages-fetch/src/cache_archive.rs b/crates/fbuild-packages/src/cache_archive.rs → ...build-packages-fetch/src/cache_archive.rs
diff --git a/.../fbuild-packages/src/disk_cache/README.md → ...d-packages-fetch/src/disk_cache/README.md b/.../fbuild-packages/src/disk_cache/README.md → ...d-packages-fetch/src/disk_cache/README.md
diff --git a/.../fbuild-packages/src/disk_cache/budget.rs → ...d-packages-fetch/src/disk_cache/budget.rs b/.../fbuild-packages/src/disk_cache/budget.rs → ...d-packages-fetch/src/disk_cache/budget.rs
diff --git a/crates/fbuild-packages/src/disk_cache/gc.rs → ...build-packages-fetch/src/disk_cache/gc.rs b/crates/fbuild-packages/src/disk_cache/gc.rs → ...build-packages-fetch/src/disk_cache/gc.rs
diff --git a/...d-packages/src/disk_cache/index/README.md → ...ages-fetch/src/disk_cache/index/README.md b/...d-packages/src/disk_cache/index/README.md → ...ages-fetch/src/disk_cache/index/README.md
diff --git a/...ckages/src/disk_cache/index/migrations.rs → ...-fetch/src/disk_cache/index/migrations.rs b/...ckages/src/disk_cache/index/migrations.rs → ...-fetch/src/disk_cache/index/migrations.rs
diff --git a/...uild-packages/src/disk_cache/index/mod.rs → ...ackages-fetch/src/disk_cache/index/mod.rs b/...uild-packages/src/disk_cache/index/mod.rs → ...ackages-fetch/src/disk_cache/index/mod.rs
diff --git a/...uild-packages/src/disk_cache/index/pid.rs → ...ackages-fetch/src/disk_cache/index/pid.rs b/...uild-packages/src/disk_cache/index/pid.rs → ...ackages-fetch/src/disk_cache/index/pid.rs
diff --git a/...-packages/src/disk_cache/index/queries.rs → ...ges-fetch/src/disk_cache/index/queries.rs b/...-packages/src/disk_cache/index/queries.rs → ...ges-fetch/src/disk_cache/index/queries.rs
diff --git a/...ld-packages/src/disk_cache/index/tests.rs → ...kages-fetch/src/disk_cache/index/tests.rs b/...ld-packages/src/disk_cache/index/tests.rs → ...kages-fetch/src/disk_cache/index/tests.rs
diff --git a/...s/fbuild-packages/src/disk_cache/lease.rs → ...ld-packages-fetch/src/disk_cache/lease.rs b/...s/fbuild-packages/src/disk_cache/lease.rs → ...ld-packages-fetch/src/disk_cache/lease.rs
diff --git a/crates/fbuild-packages/src/disk_cache/mod.rs → ...uild-packages-fetch/src/disk_cache/mod.rs b/crates/fbuild-packages/src/disk_cache/mod.rs → ...uild-packages-fetch/src/disk_cache/mod.rs
diff --git a/...s/fbuild-packages/src/disk_cache/paths.rs → ...ld-packages-fetch/src/disk_cache/paths.rs b/...s/fbuild-packages/src/disk_cache/paths.rs → ...ld-packages-fetch/src/disk_cache/paths.rs
diff --git a/crates/fbuild-packages/src/downloader.rs → ...s/fbuild-packages-fetch/src/downloader.rs b/crates/fbuild-packages/src/downloader.rs → ...s/fbuild-packages-fetch/src/downloader.rs
diff --git a/crates/fbuild-packages/src/extractor.rs → ...es/fbuild-packages-fetch/src/extractor.rs b/crates/fbuild-packages/src/extractor.rs → ...es/fbuild-packages-fetch/src/extractor.rs
diff --git a/crates/fbuild-packages/src/http.rs → crates/fbuild-packages-fetch/src/http.rs b/crates/fbuild-packages/src/http.rs → crates/fbuild-packages-fetch/src/http.rs
diff --git a/crates/fbuild-packages/src/install_lock.rs → ...fbuild-packages-fetch/src/install_lock.rs b/crates/fbuild-packages/src/install_lock.rs → ...fbuild-packages-fetch/src/install_lock.rs
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		# fbuild-library

		Extracted from `fbuild-packages` for compile parallelism (FastLED/fbuild#1008 Phase B). Re-exported by the `fbuild-packages` facade at unchanged paths.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		# fbuild-packages-fetch

		Extracted from `fbuild-packages` for compile parallelism (FastLED/fbuild#1008 Phase B). Re-exported by the `fbuild-packages` facade at unchanged paths.