Added youki build and fromatting of scripts

Replace inline boot testing with standalone runit.sh runner for clarity:
- Remove scripts/lib/testing.sh source and boot_tests stage from build.sh
- Remove --skip-tests option from build.sh and rebuild-after-zinit.sh
- Update all docs to reference runit.sh for QEMU/cloud-hypervisor testing
- Add comprehensive claude.md as AI assistant entry point with guidelines

Testing is now fully decoupled from build pipeline; use ./runit.sh for
QEMU/cloud-hypervisor validation after builds complete.

.gitignore

@@ -38,3 +38,9 @@ linux-*.tar.xz
 # OS generated files
 .DS_Store
 Thumbs.db
+
+# files containing secrets
+config/rfs.conf
+
+# volumes created in root
+zosvol*

AGENTS.md

@@ -0,0 +1,33 @@
+# AGENTS.md
+
+This file provides guidance to agents when working with code in this repository.
+
+Non-obvious build/run facts (read from scripts):
+- Always build inside the containerized toolchain; ./scripts/build.sh will spawn a transient container, or use the persistent dev container via ./scripts/dev-container.sh start then ./scripts/dev-container.sh build.
+- The incremental pipeline is stage-driven with .build-stages markers; list status via ./scripts/build.sh --show-stages and force a subset with --rebuild-from=<stage>.
+- Outputs are anchored to PROJECT_ROOT (normalized in [bash.common.sh](scripts/lib/common.sh:236)):
+  - Kernel: dist/vmlinuz.efi (created by [bash.kernel_build_with_initramfs()](scripts/lib/kernel.sh:174))
+  - Initramfs archive: dist/initramfs.cpio.xz (created by [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688))
+- Kernel embeds the initramfs (CONFIG_INITRAMFS_SOURCE set by [bash.kernel_modify_config_for_initramfs()](scripts/lib/kernel.sh:130)); no separate initrd is required in normal flow.
+
+Fast iteration helpers (init/zinit/modules.conf):
+- Use ./scripts/rebuild-after-zinit.sh to re-copy /init, re-apply zinit, re-resolve/copy modules, and recreate the cpio (initramfs-only by default).
+  - Flags: --with-kernel (also re-embed kernel; forces --rebuild-from=initramfs_create), --refresh-container-mods (rebuild container /lib/modules if missing), --verify-only (report changes since last cpio).
+- DEBUG=1 shows full safe_execute logs and stage timings.
+
+Critical conventions (avoid breakage):
+- Use logging/safety helpers from [bash.common.sh](scripts/lib/common.sh:1): log_info/warn/error/debug, safe_execute, section_header.
+- Paths must be anchored to PROJECT_ROOT (already normalized after sourcing config) to avoid CWD drift (kernel builds cd into kernel/current).
+- Do not edit /etc/shadow directly; passwordless root is applied by chroot ${initramfs_dir} passwd -d root in [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575).
+- initdebug=true on kernel cmdline opens an early shell from [config/init](config/init) even without /init-debug.
+
+Modules and firmware (non-obvious flow):
+- Container /lib/modules/<FULL_VERSION> is the authoritative source for dependency resolution and copying into initramfs (ensure kernel_modules stage ran at least once).
+- RFS firmware pack now installs all linux-firmware* into container and packs from /lib/firmware; runtime overmount targets /lib/firmware (not /usr/lib/firmware).
+
+Troubleshooting gotchas:
+- If “Initramfs directory not found: initramfs” or kernel output in wrong place, path anchoring patches exist in [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688), [bash.initramfs_validate()](scripts/lib/initramfs.sh:799), and [bash.kernel_build_with_initramfs()](scripts/lib/kernel.sh:174); ensure DEBUG logs show “... anchored to PROJECT_ROOT”.
+- On host, the rebuild helper delegates to ./scripts/dev-container.sh so you don’t need to manually start the container.
+
+Utilities:
+- Create BIOS+UEFI USB with embedded-initramfs kernel: sudo ./scripts/make-grub-usb.sh /dev/sdX --kparams "console=ttyS0 initdebug=true" (use --with-initrd only if you want a separate initrd on ESP).

Dockerfile

@@ -7,6 +7,7 @@ RUN apk add --no-cache \
     rustup \
     upx \
     git \
+    openssh-client \
     wget \
     curl \
     tar \
@@ -18,8 +19,10 @@ RUN apk add --no-cache \
     musl-dev \
     musl-utils \
     pkgconfig \
-    openssl-dev \
+    openssl openssl-dev \
+    libseccomp libseccomp-dev \
     perl \
+    shadow \
     bash \
     findutils \
     grep \
@@ -32,6 +35,8 @@ RUN apk add --no-cache \
     elfutils-dev \
     ncurses-dev \
     kmod \
+    sqlite \
+    minio-client \
     pahole
 
 # Setup rustup with stable and musl target
@@ -50,6 +55,5 @@ RUN chown builder:builder /workspace
 
 # Set environment variables - rustup handles everything
 ENV PATH="/root/.cargo/bin:${PATH}"
-ENV RUSTFLAGS="-C target-feature=+crt-static"
 
 CMD ["/bin/bash"]

README.md

@@ -7,7 +7,7 @@ A comprehensive build system for creating custom Alpine Linux 3.22 x86_64 initra
 - **Alpine Linux 3.22** miniroot as base system
 - **zinit** process manager (complete OpenRC replacement)
 - **Rootless containers** (Docker/Podman compatible)
-- **Rust components** with musl targeting (zinit, rfs, mycelium)
+- **Rust components** with musl targeting (zinit, rfs, mycelium, zosstorage)
 - **Aggressive optimization** (strip + UPX compression)
 - **2-stage module loading** for hardware support
 - **GitHub Actions** compatible build pipeline
@@ -103,8 +103,7 @@ zosbuilder/
 │   │   ├── alpine.sh       # Alpine operations
 │   │   ├── components.sh   # source building
 │   │   ├── initramfs.sh    # assembly & optimization
-│   │   ├── kernel.sh       # kernel building
-│   │   └── testing.sh      # QEMU/cloud-hypervisor
+│   │   └── kernel.sh       # kernel building
 │   ├── build.sh            # main orchestrator
 │   └── clean.sh            # cleanup script
 ├── initramfs/              # build output (generated)
@@ -222,6 +221,7 @@ Services are migrated from existing `configs/zinit/` directory with proper initi
    - **zinit**: Standard cargo build
    - **rfs**: Standard cargo build  
    - **mycelium**: Build in `myceliumd/` subdirectory
+   - **zosstorage**: Build from the storage orchestration component for Zero-OS
 4. Install binaries to initramfs
 
 ### Phase 4: System Configuration
@@ -243,34 +243,40 @@ Services are migrated from existing `configs/zinit/` directory with proper initi
 ### Phase 6: Packaging
 1. Create `initramfs.cpio.xz` with XZ compression
 2. Build kernel with embedded initramfs
-3. Generate `vmlinuz.efi`
+3. Generate `vmlinuz.efi` (default kernel)
+4. Generate versioned kernel: `vmlinuz-{VERSION}-{ZINIT_HASH}.efi`
+5. Optionally upload versioned kernel to S3 (set `UPLOAD_KERNEL=true`)
 
 ## Testing
 
 ### QEMU Testing
 ```bash
-# Boot test with QEMU
-./scripts/test.sh --qemu
+# Boot test with QEMU (default)
+./runit.sh
 
-# With serial console
-./scripts/test.sh --qemu --serial
+# With custom parameters
+./runit.sh --hypervisor qemu --memory 2048 --disks 3
 ```
 
 ### cloud-hypervisor Testing
 ```bash
 # Boot test with cloud-hypervisor
-./scripts/test.sh --cloud-hypervisor
+./runit.sh --hypervisor ch
+
+# With disk reset
+./runit.sh --hypervisor ch --reset --disks 5
 ```
 
-### Custom Testing
+### Advanced Options
 ```bash
-# Manual QEMU command
-qemu-system-x86_64 \
-  -kernel dist/vmlinuz.efi \
-  -m 512M \
-  -nographic \
-  -serial mon:stdio \
-  -append "console=ttyS0,115200 console=tty1 loglevel=7"
+# See all options
+./runit.sh --help
+
+# Custom disk size and bridge
+./runit.sh --disk-size 20G --bridge zosbr --disks 4
+
+# Environment variables
+HYPERVISOR=ch NUM_DISKS=5 ./runit.sh
 ```
 
 ## Size Optimization
@@ -320,7 +326,7 @@ jobs:
     - name: Build
       run: ./scripts/build.sh
     - name: Test
-      run: ./scripts/test.sh --qemu
+      run: ./runit.sh --hypervisor qemu
 ```
 
 ## Advanced Usage
@@ -353,6 +359,72 @@ function build_myapp() {
 }
 ```
 
+### S3 Uploads (Kernel & RFS Flists)
+
+Automatically upload build artifacts to S3-compatible storage:
+
+#### Configuration
+
+Create `config/rfs.conf`:
+
+```bash
+S3_ENDPOINT="https://s3.example.com:9000"
+S3_REGION="us-east-1"
+S3_BUCKET="zos"
+S3_PREFIX="flists/zosbuilder"
+S3_ACCESS_KEY="YOUR_ACCESS_KEY"
+S3_SECRET_KEY="YOUR_SECRET_KEY"
+```
+
+#### Upload Kernel
+
+```bash
+# Enable kernel upload
+UPLOAD_KERNEL=true ./scripts/build.sh
+
+# Custom kernel subpath (default: kernel)
+KERNEL_SUBPATH=kernels UPLOAD_KERNEL=true ./scripts/build.sh
+```
+
+**Uploaded files:**
+- `s3://{bucket}/{prefix}/kernel/vmlinuz-{VERSION}-{ZINIT_HASH}.efi` - Versioned kernel
+- `s3://{bucket}/{prefix}/kernel/kernels.txt` - Text index (one kernel per line)
+- `s3://{bucket}/{prefix}/kernel/kernels.json` - JSON index with metadata
+
+**Index files:**
+The build automatically generates and uploads index files listing all available kernels in the S3 bucket. This enables:
+- Easy kernel selection in web UIs (dropdown menus)
+- Programmatic access without S3 API listing
+- Metadata like upload timestamp and kernel count (JSON format)
+
+**JSON index format:**
+```json
+{
+  "kernels": [
+    "vmlinuz-6.12.44-Zero-OS-abc1234.efi",
+    "vmlinuz-6.12.44-Zero-OS-def5678.efi"
+  ],
+  "updated": "2025-01-04T12:00:00Z",
+  "count": 2
+}
+```
+
+#### Upload RFS Flists
+
+```bash
+# Enable flist uploads
+UPLOAD_MANIFESTS=true ./scripts/build.sh
+```
+
+Uploaded as:
+- `s3://{bucket}/{prefix}/manifests/modules-{VERSION}.fl`
+- `s3://{bucket}/{prefix}/manifests/firmware-{TAG}.fl`
+
+#### Requirements
+
+- MinIO Client (`mcli` or `mc`) must be installed
+- Valid S3 credentials in `config/rfs.conf`
+
 ### Container Builds
 
 Build in isolated container:
@@ -369,7 +441,7 @@ podman run --rm \
   ./scripts/build.sh
 ```
 
-### Cross-Platform Support
+### Cross-Platform Support (totally untestd)
 
 The build system supports multiple architectures:
 
@@ -419,15 +491,6 @@ export DEBUG=1
 ./scripts/build.sh
 ```
 
-### Size Analysis
-```bash
-# Analyze initramfs contents
-./scripts/analyze-size.sh
-
-# Show largest files
-find initramfs/ -type f -exec du -h {} \; | sort -rh | head -20
-```
-
 ## Contributing
 
 1. **Fork** the repository
@@ -440,13 +503,16 @@ find initramfs/ -type f -exec du -h {} \; | sort -rh | head -20
 
 ```bash
 # Setup development environment
-./scripts/setup-dev.sh
+./scripts/dev-container.sh start
 
-# Run tests
-./scripts/test.sh --all
+# Run incremental build
+./scripts/build.sh
 
-# Check size impact
-./scripts/analyze-size.sh --compare
+# Test with QEMU
+./runit.sh --hypervisor qemu
+
+# Test with cloud-hypervisor
+./runit.sh --hypervisor ch
 ```
 
 ## License

claude.md

@@ -0,0 +1,523 @@
+# Claude Code Reference for Zero-OS Builder
+
+This document provides essential context for Claude Code (or any AI assistant) working with this Zero-OS Alpine Initramfs Builder repository.
+
+## Project Overview
+
+**What is this?**
+A sophisticated build system for creating custom Alpine Linux 3.22 x86_64 initramfs images with zinit process management, designed for Zero-OS deployment on ThreeFold Grid.
+
+**Key Features:**
+- Container-based reproducible builds (rootless podman/docker)
+- Incremental staged build pipeline with completion markers
+- zinit process manager (complete OpenRC replacement)
+- RFS (Remote File System) for lazy-loading modules/firmware from S3
+- Rust components built with musl static linking
+- Aggressive size optimization (strip + UPX)
+- Embedded initramfs in kernel (single vmlinuz.efi output)
+
+## Repository Structure
+
+```
+zosbuilder/
+├── config/                  # All configuration files
+│   ├── build.conf          # Build settings (versions, paths, flags)
+│   ├── packages.list       # Alpine packages to install
+│   ├── sources.conf        # ThreeFold components to build
+│   ├── modules.conf        # 2-stage kernel module loading
+│   ├── firmware.conf       # Firmware to include in initramfs
+│   ├── kernel.config       # Linux kernel configuration
+│   ├── init                # /init script for initramfs
+│   └── zinit/              # zinit service definitions (YAML)
+│
+├── scripts/
+│   ├── build.sh            # Main orchestrator (DO NOT EDIT LIGHTLY)
+│   ├── clean.sh            # Clean all artifacts
+│   ├── dev-container.sh    # Persistent dev container manager
+│   ├── rebuild-after-zinit.sh  # Quick rebuild helper
+│   ├── lib/                # Modular build libraries
+│   │   ├── common.sh       # Logging, path normalization, utilities
+│   │   ├── stages.sh       # Incremental stage tracking
+│   │   ├── docker.sh       # Container lifecycle
+│   │   ├── alpine.sh       # Alpine extraction, packages, cleanup
+│   │   ├── components.sh   # Build Rust components from sources.conf
+│   │   ├── initramfs.sh    # Assembly, optimization, CPIO creation
+│   │   └── kernel.sh       # Kernel download, config, build, embed
+│   └── rfs/                # RFS flist generation scripts
+│       ├── common.sh       # S3 config, version computation
+│       ├── pack-modules.sh # Create modules flist
+│       ├── pack-firmware.sh # Create firmware flist
+│       └── verify-flist.sh  # Inspect/test flists
+│
+├── docs/                   # Detailed documentation
+│   ├── NOTES.md           # Operational knowledge & troubleshooting
+│   ├── PROMPT.md          # Agent guidance (strict debugger mode)
+│   ├── TODO.md            # Persistent checklist with code refs
+│   ├── AGENTS.md          # Quick reference for agents
+│   ├── rfs-flists.md      # RFS design and runtime flow
+│   ├── review-rfs-integration.md  # Integration points
+│   └── depmod-behavior.md # Module dependency details
+│
+├── runit.sh               # Test runner (QEMU/cloud-hypervisor)
+├── initramfs/             # Generated initramfs tree
+├── components/            # Generated component sources
+├── kernel/                # Generated kernel source
+├── dist/                  # Final outputs
+│   ├── vmlinuz.efi        # Kernel with embedded initramfs
+│   └── initramfs.cpio.xz  # Standalone initramfs archive
+└── .build-stages/         # Incremental build markers (*.done files)
+```
+
+## Core Concepts
+
+### 1. Incremental Staged Builds
+
+**How it works:**
+- Each stage creates a `.build-stages/<stage_name>.done` marker on success
+- Subsequent builds skip completed stages unless forced
+- Use `./scripts/build.sh --show-stages` to see status
+- Use `./scripts/build.sh --rebuild-from=<stage>` to restart from a specific stage
+- Manually remove `.done` files to re-run specific stages
+
+**Build stages (in order):**
+```
+alpine_extract → alpine_configure → alpine_packages → alpine_firmware
+  → components_build → components_verify → kernel_modules
+  → init_script → components_copy → zinit_setup
+  → modules_setup → modules_copy → cleanup → rfs_flists
+  → validation → initramfs_create → initramfs_test → kernel_build
+```
+
+**Key insight:** The build ALWAYS runs inside a container. Host invocations auto-spawn containers.
+
+### 2. Container-First Architecture
+
+**Why containers?**
+- Reproducible toolchain (Alpine 3.22 base with exact dependencies)
+- Rootless execution (no privileged access needed)
+- Isolation from host environment
+- GitHub Actions compatible
+
+**Container modes:**
+- **Transient:** `./scripts/build.sh` spawns, builds, exits
+- **Persistent:** `./scripts/dev-container.sh start/shell/build`
+
+**Important:** Directory paths are normalized to absolute PROJECT_ROOT to avoid CWD issues when stages change directories (especially kernel builds).
+
+### 3. Component Build System
+
+**sources.conf format:**
+```
+TYPE:NAME:URL:VERSION:BUILD_FUNCTION[:EXTRA]
+```
+
+**Example:**
+```bash
+git:zinit:https://github.com/threefoldtech/zinit:master:build_zinit
+git:rfs:https://github.com/threefoldtech/rfs:development:build_rfs
+git:mycelium:https://github.com/threefoldtech/mycelium:0.6.1:build_mycelium
+release:corex:https://github.com/threefoldtech/corex/releases/download/2.1.4/corex-2.1.4-amd64-linux-static:2.1.4:install_corex:rename=corex
+```
+
+**Build functions** are defined in `scripts/lib/components.sh` and handle:
+- Rust builds with `x86_64-unknown-linux-musl` target
+- Static linking via `RUSTFLAGS="-C target-feature=+crt-static"`
+- Special cases (e.g., mycelium builds in `myceliumd/` subdirectory)
+
+### 4. RFS Flists (Remote File System)
+
+**Purpose:** Lazy-load kernel modules and firmware from S3 at runtime
+
+**Flow:**
+1. Build stage creates flists: `modules-<KERNEL_VERSION>.fl` and `firmware-<TAG>.fl`
+2. Flists are SQLite databases containing:
+   - Content-addressed blob references
+   - S3 store URIs (patched for read-only access)
+   - Directory tree metadata
+3. Flists embedded in initramfs at `/etc/rfs/`
+4. Runtime: zinit units mount flists over `/lib/modules/` and `/lib/firmware/`
+5. Dual udev coldplug: early (before RFS) for networking, post-RFS for new hardware
+
+**Key files:**
+- `scripts/rfs/pack-modules.sh` - Creates modules flist from container `/lib/modules/`
+- `scripts/rfs/pack-firmware.sh` - Creates firmware flist from Alpine packages
+- `config/zinit/init/modules.sh` - Runtime mount script
+- `config/zinit/init/firmware.sh` - Runtime mount script
+
+### 5. zinit Service Management
+
+**No OpenRC:** This system uses zinit exclusively for process management.
+
+**Service graph:**
+```
+/init → zinit → [stage1-modules, udevd, depmod]
+                → udev-trigger (early coldplug)
+                → network
+                → rfs-modules + rfs-firmware (mount flists)
+                → udev-rfs (post-RFS coldplug)
+                → services
+```
+
+**Service definitions:** YAML files in `config/zinit/` with `after:`, `needs:`, `wants:` dependencies
+
+### 6. Kernel Versioning and S3 Upload
+
+**Versioned Kernel Output:**
+- Standard kernel: `dist/vmlinuz.efi` (for compatibility)
+- Versioned kernel: `dist/vmlinuz-{VERSION}-{ZINIT_HASH}.efi`
+- Example: `vmlinuz-6.12.44-Zero-OS-a1b2c3d.efi`
+
+**Version components:**
+- `{VERSION}`: Full kernel version from `KERNEL_VERSION` + `CONFIG_LOCALVERSION`
+- `{ZINIT_HASH}`: Short git commit hash from `components/zinit/.git`
+
+**S3 Upload (optional):**
+- Controlled by `UPLOAD_KERNEL=true` environment variable
+- Uses MinIO client (`mcli` or `mc`) to upload to S3-compatible storage
+- Uploads versioned kernel to: `s3://{bucket}/{prefix}/kernel/{versioned_filename}`
+
+**Kernel Index Generation:**
+After uploading, automatically generates and uploads index files:
+- `kernels.txt` - Plain text, one kernel per line, sorted reverse chronologically
+- `kernels.json` - JSON format with metadata (timestamp, count)
+
+**Why index files?**
+- S3 web interfaces often don't support directory listings
+- Enables dropdown menus in web UIs without S3 API access
+- Provides kernel discovery for deployment tools
+
+**JSON index structure:**
+```json
+{
+  "kernels": ["vmlinuz-6.12.44-Zero-OS-abc1234.efi", ...],
+  "updated": "2025-01-04T12:00:00Z",
+  "count": 2
+}
+```
+
+**Key functions:**
+- `get_git_commit_hash()` in `scripts/lib/common.sh` - Extracts git hash
+- `kernel_build_with_initramfs()` in `scripts/lib/kernel.sh` - Creates versioned kernel
+- `kernel_upload_to_s3()` in `scripts/lib/kernel.sh` - Uploads to S3
+- `kernel_generate_index()` in `scripts/lib/kernel.sh` - Generates and uploads index
+
+## Critical Conventions
+
+### Path Normalization
+**Problem:** Stages can change CWD (kernel build uses `/workspace/kernel/current`)
+**Solution:** All paths normalized to absolute at startup in `scripts/lib/common.sh:244`
+
+**Variables affected:**
+- `INSTALL_DIR` (initramfs/)
+- `COMPONENTS_DIR` (components/)
+- `KERNEL_DIR` (kernel/)
+- `DIST_DIR` (dist/)
+
+**Never use relative paths** when calling functions that might be in different CWDs.
+
+### Branding and Security
+**Passwordless root enforcement:**
+- Applied in `scripts/lib/initramfs.sh:575` via `passwd -d -R "${initramfs_dir}" root`
+- Creates `root::` in `/etc/shadow` (empty password field)
+- Controlled by `ZEROOS_BRANDING` and `ZEROOS_PASSWORDLESS_ROOT` flags
+
+**Never edit /etc/shadow manually** - always use `passwd` or `chpasswd` with chroot.
+
+### Module Loading Strategy
+**2-stage approach:**
+- **Stage 1:** Critical boot modules (virtio, e1000, scsi) - loaded by zinit early
+- **Stage 2:** Extended hardware (igb, ixgbe, i40e) - loaded after network
+
+**Config:** `config/modules.conf` with `stage1:` and `stage2:` prefixes
+
+**Dependency resolution:**
+- Uses `modinfo` to build dependency tree
+- Resolves from container `/lib/modules/<FULL_VERSION>/`
+- Must run after `kernel_modules` stage
+
+### Firmware Policy
+**For initramfs:** `config/firmware.conf` is the SINGLE source of truth
+- Any firmware hints in `modules.conf` are IGNORED
+- Prevents duplication/version mismatches
+
+**For RFS:** Full Alpine `linux-firmware*` packages installed in container
+- Packed from container `/lib/firmware/`
+- Overmounts at runtime for extended hardware
+
+## Common Workflows
+
+### Full Build from Scratch
+```bash
+# Clean everything and rebuild
+./scripts/build.sh --clean
+
+# Or just rebuild all stages
+./scripts/build.sh --force-rebuild
+```
+
+### Quick Iteration After Config Changes
+```bash
+# After editing zinit configs, init script, or modules.conf
+./scripts/rebuild-after-zinit.sh
+
+# With kernel rebuild
+./scripts/rebuild-after-zinit.sh --with-kernel
+
+# Dry-run to see what changed
+./scripts/rebuild-after-zinit.sh --verify-only
+```
+
+### Minimal Manual Rebuild
+```bash
+# Remove specific stages
+rm -f .build-stages/initramfs_create.done
+rm -f .build-stages/validation.done
+
+# Rebuild only those stages
+DEBUG=1 ./scripts/build.sh
+```
+
+### Testing the Built Kernel
+```bash
+# QEMU (default)
+./runit.sh
+
+# cloud-hypervisor with 5 disks
+./runit.sh --hypervisor ch --disks 5 --reset
+
+# Custom memory and bridge
+./runit.sh --memory 4096 --bridge zosbr
+```
+
+### Persistent Dev Container
+```bash
+# Start persistent container
+./scripts/dev-container.sh start
+
+# Enter shell
+./scripts/dev-container.sh shell
+
+# Run build inside
+./scripts/dev-container.sh build
+
+# Stop container
+./scripts/dev-container.sh stop
+```
+
+## Debugging Guidelines
+
+### Diagnostics-First Approach
+**ALWAYS add diagnostics before fixes:**
+1. Enable `DEBUG=1` for verbose safe_execute logs
+2. Add strategic `log_debug` statements
+3. Confirm hypothesis in logs
+4. Then apply minimal fix
+
+**Example:**
+```bash
+# Bad: Guess and fix
+Edit file to fix suspected issue
+
+# Good: Diagnose first
+1. Add log_debug "Variable X=${X}, resolved=${resolved_path}"
+2. DEBUG=1 ./scripts/build.sh
+3. Confirm in output
+4. Apply fix with evidence
+```
+
+### Key Diagnostic Functions
+- `scripts/lib/common.sh`: `log_info`, `log_warn`, `log_error`, `log_debug`
+- `scripts/lib/initramfs.sh:820`: Validation debug prints (input, PWD, PROJECT_ROOT, resolved paths)
+- `scripts/lib/initramfs.sh:691`: Pre-CPIO sanity checks with file listings
+
+### Common Issues and Solutions
+
+**"Initramfs directory not found"**
+- **Cause:** INSTALL_DIR interpreted as relative in different CWD
+- **Fix:** Already patched - paths normalized at startup
+- **Check:** Look for "Validation debug:" logs showing resolved paths
+
+**"INITRAMFS_ARCHIVE unbound"**
+- **Cause:** Incremental build skipped initramfs_create stage
+- **Fix:** Already patched - stages default INITRAMFS_ARCHIVE if unset
+- **Check:** `scripts/build.sh:401` logs "defaulting INITRAMFS_ARCHIVE"
+
+**"Module dependency resolution fails"**
+- **Cause:** Container `/lib/modules/<FULL_VERSION>` missing or stale
+- **Fix:** `./scripts/rebuild-after-zinit.sh --refresh-container-mods`
+- **Check:** Ensure `kernel_modules` stage completed successfully
+
+**"Passwordless root not working"**
+- **Cause:** Branding disabled or shadow file not updated
+- **Fix:** Check ZEROOS_BRANDING=true in logs, verify /etc/shadow has `root::`
+- **Verify:** Extract initramfs and `grep '^root:' etc/shadow`
+
+## Important Files Quick Reference
+
+### Must-Read Before Editing
+- `scripts/build.sh` - Orchestrator with precise stage order
+- `scripts/lib/common.sh` - Path normalization, logging, utilities
+- `scripts/lib/stages.sh` - Stage tracking logic
+- `config/build.conf` - Version pins, directory settings, flags
+
+### Safe to Edit
+- `config/zinit/*.yaml` - Service definitions
+- `config/zinit/init/*.sh` - Runtime initialization scripts
+- `config/modules.conf` - Module lists (stage1/stage2)
+- `config/firmware.conf` - Initramfs firmware selection
+- `config/packages.list` - Alpine packages
+
+### Generated (Never Edit)
+- `initramfs/` - Assembled initramfs tree
+- `components/` - Downloaded component sources
+- `kernel/` - Kernel source tree
+- `dist/` - Build outputs
+- `.build-stages/` - Completion markers
+
+## Testing Architecture
+
+**No built-in tests during build** - Tests run separately via `runit.sh`
+
+**Why?**
+- Build is for assembly, not validation
+- Tests require hypervisor (QEMU/cloud-hypervisor)
+- Separation allows faster iteration
+
+**runit.sh features:**
+- Multi-disk support (qcow2 for QEMU, raw for cloud-hypervisor)
+- Network bridge/TAP configuration
+- Persistent volumes (reset with `--reset`)
+- Serial console logging
+
+## Quick Command Reference
+
+```bash
+# Build
+./scripts/build.sh                      # Incremental build
+./scripts/build.sh --clean             # Clean build
+./scripts/build.sh --show-stages       # Show completion status
+./scripts/build.sh --rebuild-from=zinit_setup  # Rebuild from stage
+DEBUG=1 ./scripts/build.sh             # Verbose output
+
+# Rebuild helpers
+./scripts/rebuild-after-zinit.sh       # After zinit/init/modules changes
+./scripts/rebuild-after-zinit.sh --with-kernel  # Also rebuild kernel
+./scripts/rebuild-after-zinit.sh --verify-only  # Dry-run
+
+# Testing
+./runit.sh                             # QEMU test
+./runit.sh --hypervisor ch             # cloud-hypervisor test
+./runit.sh --help                      # All options
+
+# Dev container
+./scripts/dev-container.sh start       # Start persistent container
+./scripts/dev-container.sh shell       # Enter shell
+./scripts/dev-container.sh build       # Build inside container
+./scripts/dev-container.sh stop        # Stop container
+
+# Cleanup
+./scripts/clean.sh                     # Remove all generated files
+rm -rf .build-stages/                  # Reset stage markers
+```
+
+## Environment Variables
+
+**Build control:**
+- `DEBUG=1` - Enable verbose logging
+- `FORCE_REBUILD=true` - Force rebuild all stages
+- `REBUILD_FROM_STAGE=<name>` - Rebuild from specific stage
+
+**Version overrides:**
+- `ALPINE_VERSION=3.22` - Alpine Linux version
+- `KERNEL_VERSION=6.12.44` - Linux kernel version
+- `RUST_TARGET=x86_64-unknown-linux-musl` - Rust compilation target
+
+**Firmware tagging:**
+- `FIRMWARE_TAG=20250908` - Firmware flist version tag
+
+**S3 upload control:**
+- `UPLOAD_KERNEL=true` - Upload versioned kernel to S3 (default: false)
+- `UPLOAD_MANIFESTS=true` - Upload RFS flists to S3 (default: false)
+- `KERNEL_SUBPATH=kernel` - S3 subpath for kernel uploads (default: kernel)
+
+**S3 configuration:**
+- See `config/rfs.conf` for S3 endpoint, credentials, paths
+- Used by both RFS flist uploads and kernel uploads
+
+## Documentation Hierarchy
+
+**Start here:**
+1. `README.md` - User-facing guide with features and setup
+2. This file (`claude.md`) - AI assistant context
+
+**For development:**
+3. `docs/NOTES.md` - Operational knowledge, troubleshooting
+4. `docs/AGENTS.md` - Quick agent reference
+5. `docs/TODO.md` - Current work checklist with code links
+
+**For deep dives:**
+6. `docs/PROMPT.md` - Strict debugger agent mode (diagnostics-first)
+7. `docs/rfs-flists.md` - RFS design and implementation
+8. `docs/review-rfs-integration.md` - Integration points analysis
+9. `docs/depmod-behavior.md` - Module dependency deep dive
+
+**Historical:**
+10. `IMPLEMENTATION_PLAN.md` - Original design document
+11. `GITHUB_ACTIONS.md` - CI/CD setup guide
+
+## Project Philosophy
+
+1. **Reproducibility:** Container-based builds ensure identical results
+2. **Incrementality:** Stage markers minimize rebuild time
+3. **Diagnostics-first:** Log before fixing, validate assumptions
+4. **Minimal intervention:** Alpine + zinit only, no systemd/OpenRC
+5. **Size-optimized:** Aggressive cleanup, strip, UPX compression
+6. **Remote-ready:** RFS enables lazy-loading for extended hardware support
+
+## Commit Message Guidelines
+
+**DO NOT add Claude Code or AI assistant references to commit messages.**
+
+Keep commits clean and professional:
+- Focus on what changed and why
+- Use conventional commit prefixes: `build:`, `docs:`, `fix:`, `feat:`, `refactor:`
+- Be concise but descriptive
+- No emoji unless project convention
+- No "Generated with Claude Code" or "Co-Authored-By: Claude" footers
+
+**Good example:**
+```
+build: remove testing.sh in favor of runit.sh
+
+Replace inline boot testing with standalone runit.sh runner.
+Tests now run separately from build pipeline for faster iteration.
+```
+
+**Bad example:**
+```
+build: remove testing.sh 🤖
+
+Made some changes to testing.
+
+🤖 Generated with [Claude Code](https://claude.com/claude-code)
+Co-Authored-By: Claude <noreply@anthropic.com>
+```
+
+## Keywords for Quick Search
+
+- **Build fails:** Check `DEBUG=1` logs, stage completion markers, container state
+- **Module issues:** `kernel_modules` stage, `CONTAINER_MODULES_PATH`, depmod logs
+- **Firmware missing:** `config/firmware.conf` for initramfs, RFS flist for runtime
+- **zinit problems:** Service YAML syntax, dependency order, init script errors
+- **Path errors:** Absolute path normalization in `common.sh:244`
+- **Size too large:** Check cleanup stage, strip/UPX execution, package list
+- **Container issues:** Rootless setup, subuid/subgid, podman vs docker
+- **RFS mount fails:** S3 credentials, network readiness, flist manifest paths
+- **Kernel upload:** `UPLOAD_KERNEL=true`, requires `config/rfs.conf`, MinIO client (`mcli`/`mc`)
+- **Kernel index:** Auto-generated `kernels.txt`/`kernels.json` for dropdown UIs, updated on upload
+
+---
+
+**Last updated:** 2025-01-04
+
+**Maintainer notes:** This file is the entry point for AI assistants. Keep it updated when architecture changes. Cross-reference with `docs/NOTES.md` for operational details.

config/build.conf

@@ -3,7 +3,7 @@
 
 # System versions
 ALPINE_VERSION="3.22"
-KERNEL_VERSION="6.12.44"
+KERNEL_VERSION="6.12.49"
 
 # Rust configuration
 RUST_TARGET="x86_64-unknown-linux-musl"
@@ -34,11 +34,34 @@ DIST_DIR="dist"
 ALPINE_MIRROR="https://dl-cdn.alpinelinux.org/alpine"
 KERNEL_SOURCE_URL="https://cdn.kernel.org/pub/linux/kernel"
 
+# RFS flists (firmware manifest naming)
+# FIRMWARE_TAG controls firmware flist manifest naming for reproducible builds.
+# - If set, firmware manifest becomes: firmware-$FIRMWARE_TAG.fl
+# - If unset, the build embeds firmware-latest.fl, while standalone pack may default to date-based naming.
+# Examples:
+# FIRMWARE_TAG="20250908"
+# FIRMWARE_TAG="v1"
+#FIRMWARE_TAG="latest"
+
+# Branding and customization guard (default off)
+# Set to "true" to enable Zero-OS branding and passwordless root in initramfs.
+# Both variables are accepted; ZEROOS_BRANDING takes precedence if both set.
+ZEROOS_BRANDING="true"
+ZEROOS_REBRANDING="true"
+
+# Root account configuration
+# Provide either ZEROOS_ROOT_PASSWORD_HASH (preferred, SHA-512 crypt) or ZEROOS_ROOT_PASSWORD (plain, will be hashed during build)
+# Legacy variable names also supported: ROOT_PASSWORD_HASH / ROOT_PASSWORD
+# Passwordless root is the default for branded builds when no password is provided.
+ZEROOS_PASSWORDLESS_ROOT="true"
+# ZEROOS_ROOT_PASSWORD_HASH=""    # optional, preferred when setting a password
+# ZEROOS_ROOT_PASSWORD=""         # optional, dev-only; if set, overrides passwordless
 # Feature flags
 ENABLE_STRIP="true"
 ENABLE_UPX="true"
 ENABLE_AGGRESSIVE_CLEANUP="true"
 ENABLE_2STAGE_MODULES="true"
+UPLOAD_KERNEL=true
 
 # Debug and development
 DEBUG_DEFAULT="0"

config/firmware.conf

@@ -2,12 +2,15 @@
 # Alpine Linux provides separate firmware packages for hardware support
 # Format: FIRMWARE_PACKAGE:DESCRIPTION
 
-# Essential network firmware packages
-linux-firmware-bnx2:Broadcom NetXtreme firmware
+# Essential network firmware packages (wired NICs matching stage1 drivers)
+linux-firmware-bnx2:Broadcom NetXtreme (bnx2) firmware
+linux-firmware-bnx2x:Broadcom NetXtreme II (bnx2x) firmware
+linux-firmware-tigon:Broadcom tg3 (Tigon) firmware
 linux-firmware-e100:Intel PRO/100 firmware
-linux-firmware-intel:Intel network and WiFi firmware (includes e1000e, igb, ixgbe, i40e, ice)
-linux-firmware-realtek:Realtek network firmware (r8169, etc.)
-linux-firmware-qlogic:QLogic network firmware
+linux-firmware-intel:Intel NIC firmware (covers e1000e, igb, ixgbe, i40e, ice)
+linux-firmware-rtl_nic:Realtek NIC firmware (r8169, etc.)
+linux-firmware-realtek:Realtek NIC firmware (meta)
+linux-firmware-qlogic:QLogic NIC firmware
 
 # Storage firmware (if needed)
 # linux-firmware-marvell:Marvell storage/network firmware (not available in Alpine 3.22)

config/init

@@ -1,4 +1,4 @@
-#!/bin/sh -x
+#!/bin/sh
 # Alpine-based Zero-OS Init Script
 # Maintains identical flow to original busybox version
 
@@ -24,6 +24,9 @@ mount -t devtmpfs devtmpfs /dev
 mkdir -p /dev/pts
 mount -t devpts devpts /dev/pts
 
+# Re-initialize modules dependencies for basic init
+depmod -a
+
 echo "[+] building ram filesystem"
 
 
@@ -46,6 +49,8 @@ echo "  copying /var..."
 cp -ar /var $target
 echo "  copying /run..."
 cp -ar /run $target
+echo "  creating /home"
+mkdir $target/home
 
 # Create essential directories
 mkdir -p $target/dev
@@ -71,19 +76,14 @@ if [ -x /sbin/udevd ]; then
     echo "  starting udevd..."
     udevd --daemon
     
-    echo "  triggering device discovery..."
-    udevadm trigger --action=add --type=subsystems
-    udevadm trigger --action=add --type=devices
-    udevadm settle
-    
-    echo "  stopping udevd..."
-    kill $(pidof udevd) || true
-else
-    echo "  warning: udevd not found, skipping hardware detection"
-fi
-
+    # Preload keyboard input modules early so console works before zinit and rfs mounts
+    echo "[+] preloading keyboard input modules"
+    for m in i8042 atkbd usbhid hid hid_generic evdev xhci_pci xhci_hcd ehci_pci ehci_hcd ohci_pci ohci_hcd uhci_hcd; do
+        modprobe "$m" 
+    done
     echo "[+] loading essential drivers"
     # Load core drivers for storage and network
+    /bin/busybox sh -l
     modprobe btrfs 2>/dev/null || true
     modprobe fuse 2>/dev/null || true
     modprobe overlay 2>/dev/null || true
@@ -97,21 +97,45 @@ modprobe virtio_pci 2>/dev/null || true
 
     # Load network drivers  
     modprobe virtio_net 2>/dev/null || true
-modprobe e1000 2>/dev/null || true
-modprobe e1000e 2>/dev/null || true
+        
+    echo "  triggering device discovery..."
+    udevadm trigger --action=add --type=subsystems
+    udevadm trigger --action=add --type=devices
+    udevadm trigger --action=add
+    udevadm settle
+    
+    echo "  stopping udevd..."
+    
+    kill $(pidof udevd) || true
+else
+    echo "  warning: udevd not found, skipping hardware detection"
+fi
+
+
+echo "[+] debug hook: initdebug=true or /init-debug"
+if grep -qw "initdebug=true" /proc/cmdline; then
+    if [ -x /init-debug ]; then
+        echo "  initdebug=true: executing /init-debug ..."
+        sh /init-debug
+    else
+        echo "  initdebug=true: starting interactive shell (no /init-debug). Type 'exit' to continue."
+        debug="-d"
+        /bin/busybox sh
+    fi
+elif [ -x /init-debug ]; then
+    echo "  executing /init-debug ..."
+    sh /init-debug
+fi
 
 # Unmount init filesystems
 umount /proc 2>/dev/null || true
 umount /sys 2>/dev/null || true
 
-echo "[+] checking for debug files"
-if [ -e /init-debug ]; then
-    echo "  executing debug script..."
-    sh /init-debug
-fi
 
 echo "[+] switching root"
 echo "  exec switch_root /mnt/root /sbin/zinit init"
-exec switch_root /mnt/root /sbin/zinit init
+exec switch_root /mnt/root /sbin/zinit ${debug} init
 
+# switch_root failed, drop into shell
+/bin/busybox sh
 ##

config/modules.conf

@@ -1,38 +1,77 @@
 # Module loading specification for Zero-OS Alpine initramfs
-# Format: STAGE:MODULE_NAME:FIRMWARE_PACKAGE (optional)
-# Focus on most common NIC modules to ensure networking works on most hardware
+# Format: STAGE:MODULE
+# Firmware selection is authoritative in config/firmware.conf; do not add firmware hints here.
 
-# Stage 1: Core subsystems + networking and essential boot modules
-# All core subsystems and NICs must be loaded BEFORE network can come up
-stage1:virtio:none                      # Core virtio subsystem (REQUIRED)
-stage1:virtio_ring:none                 # Virtio ring buffer (REQUIRED)
-stage1:virtio_pci:none                  # Virtio PCI bus
-stage1:virtio_net:none                  # Virtio network (VMs, cloud)
-stage1:virtio_scsi:none                 # Virtio SCSI (VMs, cloud)
-stage1:virtio_blk:none                  # Virtio block (VMs, cloud)
-stage1:e1000:linux-firmware-intel      # Intel E1000 (very common)
-stage1:e1000e:linux-firmware-intel     # Intel E1000E (very common)
-stage1:r8169:linux-firmware-realtek    # Realtek (most common desktop/server)
-stage1:igb:linux-firmware-intel        # Intel Gigabit (servers)
-stage1:ixgbe:linux-firmware-intel      # Intel 10GbE (servers)
-stage1:i40e:linux-firmware-intel       # Intel 40GbE (modern servers)
-stage1:ice:linux-firmware-intel        # Intel E800 series (latest)
-stage1:8139too:none                     # Realtek 8139 (legacy)
-stage1:8139cp:none                      # Realtek 8139C+ (legacy)
-stage1:bnx2:linux-firmware-bnx2        # Broadcom NetXtreme
-stage1:bnx2x:linux-firmware-bnx2       # Broadcom NetXtreme II
-stage1:tg3:none                         # Broadcom Tigon3
-stage1:b44:none                         # Broadcom 44xx
-stage1:atl1:none                        # Atheros L1
-stage1:atl1e:none                       # Atheros L1E
-stage1:atl1c:none                       # Atheros L1C
-stage1:alx:none                         # Atheros Alx
-stage1:libata:none                      # Core ATA subsystem (REQUIRED)
-stage1:scsi_mod:none                    # SCSI subsystem
-stage1:sd_mod:none                      # SCSI disk support
-stage1:ahci:none                        # SATA AHCI
-stage1:nvme_core:none                   # Core NVMe subsystem (REQUIRED)
-stage1:nvme:none                        # NVMe storage
-stage1:tun:none                         # TUN/TAP for networking
-stage1:overlay:none                     # OverlayFS for containers
+# Stage 1: boot-critical storage, core virtio, networking, overlay, and input (USB/HID/keyboard)
 
+# Storage
+stage1:libata
+stage1:libahci
+stage1:ahci
+stage1:scsi_mod
+stage1:sd_mod
+stage1:nvme_core
+stage1:nvme
+stage1:virtio_blk
+stage1:virtio_scsi
+
+# Core virtio
+stage1:virtio
+stage1:virtio_ring
+stage1:virtio_pci
+stage1:virtio_pci_legacy_dev
+stage1:virtio_pci_modern_dev
+
+# Networking (common NICs)
+stage1:virtio_net
+stage1:e1000
+stage1:e1000e
+stage1:igb
+stage1:ixgbe
+stage1:igc
+stage1:i40e
+stage1:ice
+stage1:r8169
+stage1:8139too
+stage1:8139cp
+stage1:bnx2
+stage1:bnx2x
+stage1:tg3
+stage1:tun
+
+# PHY drivers
+stage1:realtek
+# Broadcom PHY families (required for many Broadcom NICs)
+stage1:broadcom
+stage1:bcm7xxx
+stage1:bcm87xx
+stage1:bcm_phy_lib
+stage1:bcm_phy_ptp
+
+# Filesystems / overlay
+stage1:overlay
+stage1:fuse
+
+# USB host controllers and HID/keyboard input
+stage1:xhci_pci
+stage1:xhci_hcd
+stage1:ehci_pci
+stage1:ehci_hcd
+stage1:ohci_pci
+stage1:ohci_hcd
+stage1:uhci_hcd
+stage1:usbhid
+stage1:hid_generic
+stage1:hid
+stage1:atkbd
+stage1:libps2
+stage1:i8042
+stage1:evdev
+stage1:serio_raw
+stage1:serio
+
+# zos core networking is with openvswitch vxlan over mycelium
+openvswitch
+
+# Keep stage2 empty; we only use stage1 in this build
+# stage2: (intentionally unused)

config/packages.list

@@ -7,6 +7,7 @@ alpine-baselayout
 alpine-baselayout-data
 busybox
 musl
+agetty
 
 # Module loading & hardware detection
 eudev
@@ -14,17 +15,24 @@ eudev-hwids
 eudev-libs
 eudev-netifnames
 kmod
+fuse3
+pciutils
+efitools
+efibootmgr
 
 # Console/terminal management
 util-linux
+wget
 
 # Essential networking (for Zero-OS connectivity)
 iproute2
 ethtool
+nftables
 
 # Filesystem support (minimal)
 btrfs-progs
 dosfstools
+sgdisk
 
 # Essential libraries only
 zlib
@@ -41,7 +49,3 @@ haveged
 openssh-server
 zellij
 
-# Essential debugging and monitoring tools included
-# NO development tools, NO curl/wget, NO python, NO redis
-# NO massive linux-firmware package
-# Other tools will be loaded from RFS after network connectivity

config/rfs.conf.example

@@ -0,0 +1,79 @@
+# RFS S3 (Garage) configuration for flist storage and HTTP read endpoint
+# Copy this file to config/rfs.conf and fill in real values (do not commit secrets).
+
+# S3 API endpoint of your Garage server, including scheme and optional port
+# Examples:
+#   https://hub.grid.tf
+#   http://minio:9000
+S3_ENDPOINT="https://hub.grid.tf"
+
+# AWS region string expected by the S3-compatible API
+S3_REGION="garage"
+
+# Bucket and key prefix used for RFS store (content-addressed blobs)
+# The RFS store path will be: s3://.../<S3_BUCKET>/<S3_PREFIX>
+S3_BUCKET="zos"
+S3_PREFIX="zos/store"
+
+# Access credentials (required by rfs pack to push blobs)
+S3_ACCESS_KEY="REPLACE_ME"
+S3_SECRET_KEY="REPLACE_ME"
+
+# Optional: HTTP(S) web endpoint used at runtime to fetch blobs without signed S3
+# This is the base URL that serves the same objects as the S3 store, typically a
+# public or authenticated gateway in front of Garage that allows read access.
+# The scripts will patch the .fl (sqlite) stores table to use this endpoint.
+# Ensure this path maps to the same content-addressed layout expected by rfs.
+# Example:
+#   https://hub.grid.tf/zos/zosbuilder/store
+WEB_ENDPOINT="https://hub.grid.tf/zos/zosbuilder/store"
+
+# Optional: where to upload the .fl manifest sqlite file (separate from blob store)
+# If you want to keep manifests alongside blobs, a common pattern is:
+#   s3://<S3_BUCKET>/<S3_PREFIX>/manifests/
+# Scripts will create manifests/ under S3_PREFIX automatically if left default.
+MANIFESTS_SUBPATH="manifests"
+
+# Behavior flags (can be overridden by CLI flags or env)
+# Whether to keep s3:// store as a fallback entry in the .fl after adding WEB_ENDPOINT
+KEEP_S3_FALLBACK="true"
+
+# Whether to attempt uploading .fl manifests to S3 (requires MinIO Client: mc)
+UPLOAD_MANIFESTS="true"
+
+# Read-only credentials for route URL in manifest (optional; defaults to write keys above)
+# These will be embedded into the flist 'route.url' so runtime mounts can read directly from Garage.
+# If not set, scripts fall back to S3_ACCESS_KEY/S3_SECRET_KEY.
+READ_ACCESS_KEY="REPLACE_ME_READ"
+READ_SECRET_KEY="REPLACE_ME_READ"
+
+# Route endpoint and parameters for flist route URL patching
+# - ROUTE_ENDPOINT: host:port base for Garage gateway (scheme is ignored; host:port is extracted)
+#                   If not set, defaults to S3_ENDPOINT
+# - ROUTE_PATH:     path to the blob route (default: /blobs)
+# - ROUTE_REGION:   region string for Garage (default: garage)
+ROUTE_ENDPOINT="https://hub.grid.tf"
+ROUTE_PATH="/zos/store"
+ROUTE_REGION="garage"
+# RESP/DB-style blob store (design-time placeholders; optional)
+# Enable to allow pack scripts or future rfs CLI to upload blobs to a RESP-compatible store.
+# This does not change the existing S3 flow; RESP acts as an additional backend.
+#
+# Example URI semantics (see docs/rfs-flists.md additions):
+#   resp://host:port/db?prefix=blobs
+#   resp+tls://host:port/db?prefix=blobs&amp;ca=/etc/ssl/certs/ca.pem
+#   resp+sentinel://sentinelHost:26379/mymaster?prefix=blobs
+#
+# Minimal keys for a direct RESP endpoint
+RESP_ENABLED="false"
+RESP_ENDPOINT="localhost:6379"     # host:port
+RESP_DB="0"                        # integer DB index
+RESP_PREFIX="zos/blobs"            # namespace/prefix for content-addressed keys
+RESP_USERNAME=""                   # optional
+RESP_PASSWORD=""                   # optional
+RESP_TLS="false"                   # true/false
+RESP_CA=""                         # path to CA bundle when RESP_TLS=true
+
+# Optional: Sentinel topology (overrides RESP_ENDPOINT for discovery)
+RESP_SENTINEL=""                   # sentinelHost:port (comma-separated for multiple)
+RESP_MASTER=""                     # Sentinel master name (e.g., "mymaster")

config/sources.conf

@@ -4,7 +4,9 @@
 # Git repositories to clone and build
 git zinit https://github.com/threefoldtech/zinit master build_zinit
 git mycelium https://github.com/threefoldtech/mycelium v0.6.1 build_mycelium
-
+git zosstorage https://git.ourworld.tf/delandtj/zosstorage main build_zosstorage
+git youki git@github.com:youki-dev/youki.git v0.5.7 build_youki
+git rfs https://github.com/threefoldtech/rfs development build_rfs
 # Pre-built releases to download
-release rfs https://github.com/threefoldtech/rfs/releases/download/v2.0.6/rfs v2.0.6 install_rfs
+# release rfs https://github.com/threefoldtech/rfs/releases/download/v2.0.6/rfs v2.0.6 install_rfs
 release corex https://github.com/threefoldtech/corex/releases/download/2.1.4/corex-2.1.4-amd64-linux-static 2.1.4 install_corex rename=corex

config/zinit.old/cgroup.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/cgroup.sh
-oneshot: true

config/zinit.old/depmod.yaml

@@ -1 +0,0 @@
-exec: depmod -a

config/zinit.old/getty.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty -L 115200 ttyS0 vt100
-restart: always

config/zinit.old/gettyconsole.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty console linux
-restart: always

config/zinit.old/haveged.yaml

@@ -1,2 +0,0 @@
-exec: haveged -w 1024 -d 32 -i 32 -v 1
-oneshot: true

config/zinit.old/init/ashloging.sh

@@ -1,6 +0,0 @@
-#!/bin/bash
-
-echo "start ash terminal"
-while true; do
-    getty -l /bin/ash -n 19200 tty2
-done

config/zinit.old/init/cgroup.sh

@@ -1,10 +0,0 @@
-set -x
-
-mount -t tmpfs cgroup_root /sys/fs/cgroup
-
-subsys="pids cpuset cpu cpuacct blkio memory devices freezer net_cls perf_event net_prio hugetlb"
-
-for sys in $subsys; do
-    mkdir -p /sys/fs/cgroup/$sys
-    mount -t cgroup $sys -o $sys /sys/fs/cgroup/$sys/
-done

config/zinit.old/init/modprobe.sh

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-modprobe fuse
-modprobe btrfs
-modprobe tun
-modprobe br_netfilter
-
-echo never > /sys/kernel/mm/transparent_hugepage/enabled
-
-ulimit -n 524288

config/zinit.old/init/ntpd.sh

@@ -1,10 +0,0 @@
-#!/bin/sh
-
-ntp_flags=$(grep -o 'ntp=.*' /proc/cmdline | sed 's/^ntp=//')
-
-params=""
-if [ -n "$ntp_flags" ]; then
-  params=$(echo "-p $ntp_flags" | sed s/,/' -p '/g)
-fi
-
-exec ntpd -n $params

config/zinit.old/init/routing.sh

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-echo "Enable ip forwarding"
-echo 1 > /proc/sys/net/ipv4/ip_forward

config/zinit.old/init/shm.sh

@@ -1,3 +0,0 @@
-#!/bin/sh
-mkdir /dev/shm
-mount -t tmpfs shm /dev/shm 

config/zinit.old/init/sshd-setup.sh

@@ -1,15 +0,0 @@
-#!/bin/ash
-if [ -f /etc/ssh/ssh_host_rsa_key ]; then
-    # ensure existing file permissions
-    chown root:root /etc/ssh/ssh_host_*
-    chmod 600 /etc/ssh/ssh_host_*
-    exit 0
-fi
-
-echo "Setting up sshd"
-mkdir -p /run/sshd
-
-ssh-keygen -f /etc/ssh/ssh_host_rsa_key -N '' -t rsa
-ssh-keygen -f /etc/ssh/ssh_host_dsa_key -N '' -t dsa
-ssh-keygen -f /etc/ssh/ssh_host_ecdsa_key -N '' -t ecdsa -b 521
-ssh-keygen -f /etc/ssh/ssh_host_ed25519_key -N '' -t ed25519

config/zinit.old/init/udev.sh

@@ -1,4 +0,0 @@
-#!/bin/sh
-
-udevadm trigger --action=add
-udevadm settle

config/zinit.old/lo.yaml

@@ -1,2 +0,0 @@
-exec: ip l set lo up
-oneshot: true

config/zinit.old/local-modprobe.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/modprobe.sh
-oneshot: true

config/zinit.old/mycelium.yaml

@@ -1,6 +0,0 @@
-exec: /usr/bin/mycelium --key-file /tmp/mycelium_priv_key.bin
-  --tun-name my0 --silent --peers tcp://188.40.132.242:9651 tcp://136.243.47.186:9651
-  tcp://185.69.166.7:9651 tcp://185.69.166.8:9651 tcp://65.21.231.58:9651 tcp://65.109.18.113:9651
-  tcp://209.159.146.190:9651 tcp://5.78.122.16:9651 tcp://5.223.43.251:9651 tcp://142.93.217.194:9651
-after:
-  - network

config/zinit.old/network.yaml

@@ -1,5 +0,0 @@
-exec: dhcpcd eth0
-after:
-  - depmod
-  - udevd
-  - udev-trigger

config/zinit.old/ntp.yaml

@@ -1,3 +0,0 @@
-exec: sh /etc/zinit/init/ntpd.sh
-after:
-  - network

config/zinit.old/routing.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/routing.sh
-oneshot: true

config/zinit.old/shm.yaml

@@ -1,2 +0,0 @@
-exec: /etc/zinit/init/shm.sh
-oneshot: true

config/zinit.old/sshd-setup.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/sshd-setup.sh
-oneshot: true

config/zinit.old/sshd.yaml

@@ -1,3 +0,0 @@
-exec: /usr/sbin/sshd -D -e
-after:
-    - sshd-setup

config/zinit.old/udev-trigger.yaml

@@ -1,6 +0,0 @@
-exec: sh /etc/zinit/init/udev.sh
-oneshot: true
-after:
-  - depmod
-  - udevmon
-  - udevd

config/zinit.old/udevd.yaml

@@ -1 +0,0 @@
-exec: udevd

config/zinit.old/udevmon.yaml

@@ -1 +0,0 @@
-exec: udevadm monitor

config/zinit.old/zinit.conf

@@ -1,33 +0,0 @@
-# Main zinit configuration for Zero OS Alpine
-# This replaces OpenRC completely
-
-# Logging configuration
-log_level: debug
-log_file: /var/log/zinit/zinit.log
-
-# Initialization phases
-init:
-  # Phase 1: Critical system setup
-  - stage1-modules
-  - udevd
-  - depmod
-  
-  # Phase 2: Extended hardware and networking
-  - stage2-modules
-  - network
-  - lo
-  
-  # Phase 3: System services
-  - routing
-  - ntp
-  - haveged
-  
-  # Phase 4: User services
-  - sshd-setup
-  - sshd
-  - getty
-  - console
-  - gettyconsole
-
-# Service dependencies and ordering managed by individual service files
-# All services are defined in the services/ subdirectory

config/zinit/console.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty -L 9600 console
-restart: always

config/zinit/depmod.yaml

@@ -1 +1,2 @@
 exec: depmod -a
+oneshot: true

config/zinit/getty-console.yaml

@@ -0,0 +1,2 @@
+exec: /sbin/agetty --noclear -a root console  linux
+restart: always

config/zinit/getty-tty2.yaml

@@ -0,0 +1,2 @@
+exec: /sbin/agetty --noclear -a root tty2  vt100
+restart: always

config/zinit/getty.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty -L 115200 ttyS0 vt100
-restart: always

config/zinit/gettyconsole.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty console
-restart: always

config/zinit/haveged.yaml

@@ -1,2 +1,5 @@
 exec: haveged -w 1024 -d 32 -i 32 -v 1
 oneshot: true
+after: 
+  - shm
+  

config/zinit/init/firmware.sh

@@ -0,0 +1,101 @@
+#!/bin/sh
+# rfs mount firmware flist over /lib/firmware (plain S3 route inside the .fl)
+# Looks for firmware-latest.fl in known locations; can be overridden via FIRMWARE_FLIST env
+
+set -eu
+
+log() { echo "[rfs-firmware] $*"; }
+
+RFS_BIN="${RFS_BIN:-rfs}"
+TARGET="/lib/firmware"
+
+# Accept both FLISTS_BASE_URL and FLIST_BASE_URL (alias); prefer FLISTS_BASE_URL
+if [ -n "${FLISTS_BASE_URL:-}" ]; then
+  BASE_URL="${FLISTS_BASE_URL}"
+elif [ -n "${FLIST_BASE_URL:-}" ]; then
+  BASE_URL="${FLIST_BASE_URL}"
+else
+  BASE_URL="https://zos.grid.tf/store/flists"
+fi
+
+# HTTP readiness helper: wait until BASE_URL responds to HTTP(S)
+wait_for_http() {
+  url="$1"
+  tries="${2:-60}"
+  delay="${3:-2}"
+  i=0
+  while [ "$i" -lt "$tries" ]; do
+    if command -v wget >/dev/null 2>&1; then
+      if wget -q --spider "$url"; then
+        return 0
+      fi
+    elif command -v busybox >/dev/null 2>&1; then
+      if busybox wget -q --spider "$url"; then
+        return 0
+      fi
+    fi
+    i=$((i+1))
+    log "waiting for $url (attempt $i/$tries)"
+    sleep "$delay"
+  done
+  return 1
+}
+
+# Allow override via env
+if [ -n "${FIRMWARE_FLIST:-}" ] && [ -f "${FIRMWARE_FLIST}" ]; then
+  FL="${FIRMWARE_FLIST}"
+else
+  # Candidate paths for the flist manifest
+  for p in \
+    /etc/rfs/firmware-latest.fl \
+    /var/lib/rfs/firmware-latest.fl \
+    /root/firmware-latest.fl \
+    /firmware-latest.fl \
+    ; do
+    if [ -f "$p" ]; then
+      FL="$p"
+      break
+    fi
+  done
+fi
+
+if [ -z "${FL:-}" ]; then
+  # Try remote fetch as a fallback (but first ensure BASE_URL is reachable)
+  mkdir -p /etc/rfs
+  FL="/etc/rfs/firmware-latest.fl"
+  URL="${BASE_URL%/}/firmware-latest.fl"
+  log "firmware-latest.fl not found locally; will fetch ${URL}"
+
+  # Probe BASE_URL root so DNS/HTTP are ready before fetch
+  ROOT_URL="${BASE_URL%/}/"
+  if ! wait_for_http "$ROOT_URL" 60 2; then
+    log "BASE_URL not reachable yet: ${ROOT_URL}; continuing to attempt fetch anyway"
+  fi
+  log "fetching ${URL}"
+
+  if command -v wget >/dev/null 2>&1; then
+    wget -q -O "${FL}" "${URL}" || true
+  elif command -v busybox >/dev/null 2>&1; then
+    busybox wget -q -O "${FL}" "${URL}" || true
+  else
+    log "no wget available to fetch ${URL}"
+  fi
+
+  if [ ! -s "${FL}" ]; then
+    log "failed to fetch ${URL}; skipping mount"
+    exit 0
+  fi
+fi
+
+# Ensure target directory exists
+mkdir -p "$TARGET"
+
+# Skip if already mounted
+if mountpoint -q "$TARGET" 2>/dev/null; then
+  log "already mounted: $TARGET"
+  exit 0
+fi
+
+# Perform the mount
+log "mounting ${FL} -> ${TARGET}"
+exec "$RFS_BIN" mount -m "$FL" "$TARGET"

config/zinit/init/modprobe.sh

@@ -3,7 +3,17 @@
 modprobe fuse
 modprobe btrfs
 modprobe tun
-modprobe br_netfilter
+modprobe 
+
+modprobe usbhid
+modprobe hid_generic
+modprobe hid
+modprobe atkbd
+modprobe libps2
+modprobe i2c_smbus
+modprobe serio
+modprobe i8042i
+
 
 echo never > /sys/kernel/mm/transparent_hugepage/enabled
 

config/zinit/init/modules.sh

@@ -0,0 +1,101 @@
+#!/bin/sh
+# rfs mount modules flist over /lib/modules/$(uname -r) (plain S3 route embedded in the .fl)
+# Looks for modules-$(uname -r).fl in known locations; can be overridden via MODULES_FLIST env.
+
+set -eu
+
+log() { echo "[rfs-modules] $*"; }
+
+RFS_BIN="${RFS_BIN:-rfs}"
+KVER="$(uname -r)"
+TARGET="/lib/modules/${KVER}"
+# Accept both FLISTS_BASE_URL and FLIST_BASE_URL (alias); prefer FLISTS_BASE_URL
+if [ -n "${FLISTS_BASE_URL:-}" ]; then
+  BASE_URL="${FLISTS_BASE_URL}"
+elif [ -n "${FLIST_BASE_URL:-}" ]; then
+  BASE_URL="${FLIST_BASE_URL}"
+else
+  BASE_URL="https://zos.grid.tf/store/flists"
+fi
+
+# HTTP readiness helper: wait until BASE_URL responds to HTTP(S)
+wait_for_http() {
+  url="$1"
+  tries="${2:-60}"
+  delay="${3:-2}"
+  i=0
+  while [ "$i" -lt "$tries" ]; do
+    if command -v wget >/dev/null 2>&1; then
+      if wget -q --spider "$url"; then
+        return 0
+      fi
+    elif command -v busybox >/dev/null 2>&1; then
+      if busybox wget -q --spider "$url"; then
+        return 0
+      fi
+    fi
+    i=$((i+1))
+    log "waiting for $url (attempt $i/$tries)"
+    sleep "$delay"
+  done
+  return 1
+}
+
+# Allow override via env
+if [ -n "${MODULES_FLIST:-}" ] && [ -f "${MODULES_FLIST}" ]; then
+  FL="${MODULES_FLIST}"
+else
+  # Candidate paths for the flist manifest
+  for p in \
+    "/etc/rfs/modules-${KVER}.fl" \
+    "/var/lib/rfs/modules-${KVER}.fl" \
+    "/root/modules-${KVER}.fl" \
+    "/modules-${KVER}.fl" \
+    ; do
+    if [ -f "$p" ]; then
+      FL="$p"
+      break
+    fi
+  done
+fi
+
+if [ -z "${FL:-}" ]; then
+  # Try remote fetch as a fallback (modules-<uname -r>-Zero-OS.fl)
+  mkdir -p /etc/rfs
+  FL="/etc/rfs/modules-${KVER}.fl"
+  URL="${BASE_URL%/}/modules-${KVER}-Zero-OS.fl"
+  log "modules-${KVER}.fl not found locally; will fetch ${URL}"
+
+  # Probe BASE_URL root so DNS/HTTP are ready before fetch
+  ROOT_URL="${BASE_URL%/}/"
+  if ! wait_for_http "$ROOT_URL" 60 2; then
+    log "BASE_URL not reachable yet: ${ROOT_URL}; continuing to attempt fetch anyway"
+  fi
+  log "fetching ${URL}"
+
+  if command -v wget >/dev/null 2>&1; then
+    wget -q -O "${FL}" "${URL}" || true
+  elif command -v busybox >/dev/null 2>&1; then
+    busybox wget -q -O "${FL}" "${URL}" || true
+  else
+    log "no wget available to fetch ${URL}"
+  fi
+
+  if [ ! -s "${FL}" ]; then
+    log "failed to fetch ${URL}; skipping mount"
+    exit 0
+  fi
+fi
+
+# Ensure target directory exists
+mkdir -p "$TARGET"
+
+# Skip if already mounted
+if mountpoint -q "$TARGET" 2>/dev/null; then
+  log "already mounted: $TARGET"
+  exit 0
+fi
+
+# Perform the mount
+log "mounting ${FL} -> ${TARGET}"
+exec "$RFS_BIN" mount -m "$FL" "$TARGET"

config/zinit/init/network.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+# Ensure dhcpcd user/group exist (some builds expect to drop privileges)
+if ! getent group dhcpcd >/dev/null 2>&1; then addgroup -S dhcpcd 2>/dev/null || true; fi
+if ! getent passwd dhcpcd >/dev/null 2>&1; then adduser -S -D -s /sbin/nologin -G dhcpcd dhcpcd 2>/dev/null || true; fi
+# Exec dhcpcd (will run as root if it cannot drop to dhcpcd user)
+interfaces=$(ip -br l | awk '!/lo/&&!/my0/{print $1}')
+exec dhcpcd -p -B $interfaces

config/zinit/init/ntpd.sh

@@ -1,10 +1,24 @@
 #!/bin/sh
+set -eu
 
-ntp_flags=$(grep -o 'ntp=.*' /proc/cmdline | sed 's/^ntp=//')
+# Ensure /etc/ntp.conf exists for tools/hooks expecting it
+if [ ! -e /etc/ntp.conf ] && [ -f /etc/ntpd.conf ]; then
+  ln -sf /etc/ntpd.conf /etc/ntp.conf
+fi
+# dhcpcd hook may write into /var/lib/ntp
+mkdir -p /var/lib/ntp
+
+# Extract ntp=... from kernel cmdline if present
+ntp_flags="$(grep -o 'ntp=[^ ]*' /proc/cmdline 2>/dev/null | sed 's/^ntp=//' || true)"
 
 params=""
-if [ -n "$ntp_flags" ]; then
-  params=$(echo "-p $ntp_flags" | sed s/,/' -p '/g)
+if [ -n "${ntp_flags}" ]; then
+  # Convert comma-separated list into multiple -p args
+  params="-p $(printf '%s' "${ntp_flags}" | sed 's/,/ -p /g')"
+else
+  # Sensible defaults when no ntp= is provided
+  params="-p time.google.com -p time1.google.com -p time2.google.com -p time3.google.com"
 fi
 
-exec ntpd -n $params
+# BusyBox ntpd uses -p servers on CLI; /etc/ntp.conf symlink above helps alternative daemons.
+exec ntpd -n ${params}

config/zinit/init/ovs-dbserver.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+# Simple script to create OVS database and start ovsdb-server
+
+# Configuration
+DATABASE=${DATABASE:-"/etc/openvswitch/conf.db"}
+DBSCHEMA="/usr/share/openvswitch/vswitch.ovsschema"
+DB_SOCKET=${DB_SOCKET:-"/var/run/openvswitch/db.sock"}
+RUNDIR="/var/run/openvswitch"
+
+# Create run directory
+mkdir -p "$RUNDIR"
+
+# Create database if it doesn't exist
+if [ ! -e "$DATABASE" ]; then
+    echo "Creating database: $DATABASE"
+    ovsdb-tool create "$DATABASE" "$DBSCHEMA"
+fi
+
+# Check if database needs conversion
+if [ "$(ovsdb-tool needs-conversion "$DATABASE" "$DBSCHEMA")" = "yes" ]; then
+    echo "Converting database: $DATABASE"
+    ovsdb-tool convert "$DATABASE" "$DBSCHEMA"
+fi
+
+# Start ovsdb-server
+echo "Starting ovsdb-server..."
+exec ovsdb-server \
+    --remote=punix:"$DB_SOCKET" \
+    --remote=db:Open_vSwitch,Open_vSwitch,manager_options \
+    --pidfile \
+    --detach \
+    "$DATABASE"

config/zinit/mycelium.yaml

@@ -1,6 +1,8 @@
-exec: /usr/bin/mycelium --key-file /tmp/mycelium_priv_key.bin
+exec: /usr/bin/mycelium --key-file /var/cache/etc/mycelium_priv_key.bin
   --tun-name my0 --silent --peers tcp://188.40.132.242:9651 tcp://136.243.47.186:9651
   tcp://185.69.166.7:9651 tcp://185.69.166.8:9651 tcp://65.21.231.58:9651 tcp://65.109.18.113:9651
   tcp://209.159.146.190:9651 tcp://5.78.122.16:9651 tcp://5.223.43.251:9651 tcp://142.93.217.194:9651
 after:
   - network
+  - udev-rfs
+  - zosstorage

config/zinit/network.yaml

@@ -1,5 +1,6 @@
-exec: dhcpcd eth0
+exec: sh /etc/zinit/init/network.sh
 after:
   - depmod
   - udevd
   - udev-trigger
+test: ping -c1 www.google.com

config/zinit/ovs-dbserver.yaml

@@ -0,0 +1,4 @@
+exec: /etc/zinit/init/ovsdb-server.sh
+oneshot: true
+after:
+  - zossstorage

config/zinit/rfs-firmware.yaml

@@ -0,0 +1,4 @@
+exec: sh /etc/zinit/init/firmware.sh
+restart: always
+after:
+  - network

config/zinit/rfs-modules.yaml

@@ -0,0 +1,4 @@
+exec: sh /etc/zinit/init/modules.sh
+restart: always
+after:
+  - rfs-firmware

config/zinit/sshd-setup.yaml

@@ -1,2 +1,4 @@
 exec: sh /etc/zinit/init/sshd-setup.sh
 oneshot: true
+after: 
+  - network

config/zinit/sshd.yaml

@@ -1,3 +1,4 @@
 exec: /usr/sbin/sshd -D -e
 after:
     - sshd-setup
+    - haveged

config/zinit/udev-rfs.yaml

@@ -0,0 +1,4 @@
+exec: sh -c "sleep 3 ; /etc/zinit/init/udev.sh"
+oneshot: true
+after:
+  - rfs-modules

config/zinit/zosstorage.yaml

@@ -0,0 +1,4 @@
+exec: /usr/bin/zosstorage -l debug
+oneshot: true
+after:
+  - rfs-modules

configs/init

@@ -1,106 +0,0 @@
-#!/bin/sh -x
-# Alpine-based Zero-OS Init Script
-# Maintains identical flow to original busybox version
-
-echo ""
-echo "============================================"
-echo "==       ZERO-OS ALPINE INITRAMFS        =="
-echo "============================================"
-
-echo "[+] creating ram filesystem"
-target="/mnt/root"
-mkdir -p $target
-mount -t proc proc /proc
-mount -t sysfs sysfs /sys
-mount -t tmpfs tmpfs /mnt/root -o size=1024M
-mount -t devtmpfs devtmpfs /dev
-
-echo "[+] building ram filesystem"
-
-# Copy Alpine filesystem to tmpfs (same as original)
-echo "  copying /bin..."
-cp -ar /bin $target
-echo "  copying /etc..."
-cp -ar /etc $target
-echo "  copying /lib..."
-cp -ar /lib* $target
-echo "  copying /usr..."
-cp -ar /usr $target
-echo "  copying /root..."
-cp -ar /root $target
-echo "  copying /sbin..."
-cp -ar /sbin $target
-echo "  copying /tmp..."
-cp -ar /tmp $target
-echo "  copying /var..."
-cp -ar /var $target
-echo "  copying /run..."
-cp -ar /run $target
-
-# Create essential directories
-mkdir -p $target/dev
-mkdir -p $target/sys
-mkdir -p $target/proc
-mkdir -p $target/mnt
-
-# Mount filesystems in tmpfs
-mount -t proc proc $target/proc
-mount -t sysfs sysfs $target/sys
-mount -t devtmpfs devtmpfs $target/dev
-
-# Mount devpts for terminals
-mkdir -p $target/dev/pts
-mount -t devpts devpts $target/dev/pts
-
-echo "[+] setting environment"
-export PATH
-
-echo "[+] probing drivers"
-# Use Alpine's udev instead of busybox udevadm
-if [ -x /sbin/udevd ]; then
-    echo "  starting udevd..."
-    udevd --daemon
-    
-    echo "  triggering device discovery..."
-    udevadm trigger --action=add --type=subsystems
-    udevadm trigger --action=add --type=devices
-    udevadm settle
-    
-    echo "  stopping udevd..."
-    kill $(pidof udevd) || true
-else
-    echo "  warning: udevd not found, skipping hardware detection"
-fi
-
-echo "[+] loading essential drivers"
-# Load core drivers for storage and network
-modprobe btrfs 2>/dev/null || true
-modprobe fuse 2>/dev/null || true
-modprobe overlay 2>/dev/null || true
-
-# Load storage drivers
-modprobe ahci 2>/dev/null || true
-modprobe nvme 2>/dev/null || true
-modprobe virtio_blk 2>/dev/null || true
-modprobe virtio_scsi 2>/dev/null || true
-
-# Load network drivers  
-modprobe virtio_net 2>/dev/null || true
-modprobe e1000 2>/dev/null || true
-modprobe e1000e 2>/dev/null || true
-
-# Unmount init filesystems
-umount /proc 2>/dev/null || true
-umount /sys 2>/dev/null || true
-
-echo "[+] checking for debug files"
-if [ -e /init-debug ]; then
-    echo "  executing debug script..."
-    sh /init-debug
-fi
-
-echo "[+] switching root"
-echo "  exec switch_root /mnt/root /sbin/zinit init"
-exec switch_root /mnt/root /sbin/zinit -d init
-
-## 

configs/modules-essential.list

@@ -1,59 +0,0 @@
-# Essential kernel modules for Zero-OS Alpine initramfs
-# This file contains a curated list of essential modules for network and storage functionality
-# Comments are supported (lines starting with #)
-
-# Network drivers - Intel
-e1000
-e1000e
-igb
-ixgbe
-i40e
-ice
-
-# Network drivers - Realtek
-r8169
-8139too
-8139cp
-
-# Network drivers - Broadcom
-bnx2
-bnx2x
-tg3
-b44
-
-# Network drivers - Atheros
-atl1
-atl1e
-atl1c
-alx
-
-# VirtIO drivers
-virtio_net
-virtio_scsi
-virtio_blk
-virtio_pci
-
-# Tunnel and container support
-tun
-overlay
-
-# Storage subsystem (essential only)
-scsi_mod
-sd_mod
-
-# Control Groups (cgroups v1 and v2) - essential for container management
-cgroup_pids
-cgroup_freezer
-cgroup_perf_event
-cgroup_device
-cgroup_cpuset
-cgroup_bpf
-cgroup_debug
-memcg
-blkio_cgroup
-cpu_cgroup
-cpuacct
-hugetlb_cgroup
-net_cls_cgroup
-net_prio_cgroup
-devices_cgroup

configs/packages-minimal.txt

@@ -1,46 +0,0 @@
-# MINIMAL Alpine packages for Zero-OS embedded initramfs
-# Target: ~50MB total (not 700MB!)
-
-# Core system (essential only)
-alpine-baselayout
-busybox
-musl
-
-# Module loading & hardware detection
-eudev
-eudev-hwids
-eudev-libs
-eudev-netifnames
-kmod
-
-# Console/terminal management
-util-linux
-
-# Essential networking (for Zero-OS connectivity)
-iproute2
-ethtool
-
-# Filesystem support (minimal)
-btrfs-progs
-dosfstools
-
-# Essential libraries only
-zlib
-
-# Network utilities (minimal)
-dhcpcd
-tcpdump
-bmon
-
-# Random number generation (for crypto/security)
-haveged
-
-# SSH access and terminal multiplexer
-openssh-server
-zellij
-
-
-# Essential debugging and monitoring tools included
-# NO development tools, NO curl/wget, NO python, NO redis
-# NO massive linux-firmware package
-# Other tools will be loaded from RFS after network connectivity

configs/sources.conf

@@ -1,10 +0,0 @@
-# sources.conf - Components to download and build for initramfs
-# Format: TYPE:NAME:URL:VERSION:BUILD_FUNCTION[:EXTRA_OPTIONS]
-
-# Git repositories to clone and build
-git:zinit:https://github.com/threefoldtech/zinit:master:build_zinit
-git:mycelium:https://github.com/threefoldtech/mycelium:0.6.1:build_mycelium
-git:rfs:https://github.com/threefoldtech/rfs:development:build_rfs
-
-# Pre-built releases to download
-release:corex:https://github.com/threefoldtech/corex/releases/download/2.1.4/corex-2.1.4-amd64-linux-static:2.1.4:install_corex:rename=corex

configs/zinit/cgroup.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/cgroup.sh
-oneshot: true

configs/zinit/console.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty -L 9600 console
-restart: always

configs/zinit/depmod.yaml

@@ -1 +0,0 @@
-exec: depmod -a

configs/zinit/getty.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty -L 115200 ttyS0 vt100
-restart: always

configs/zinit/gettyconsole.yaml

@@ -1,2 +0,0 @@
-exec: /sbin/getty console linux
-restart: always

configs/zinit/haveged.yaml

@@ -1,2 +0,0 @@
-exec: haveged -w 1024 -d 32 -i 32 -v 1
-oneshot: true

configs/zinit/init/ashloging.sh

@@ -1,6 +0,0 @@
-#!/bin/bash
-
-echo "start ash terminal"
-while true; do
-    getty -l /bin/ash -n 19200 tty2
-done

configs/zinit/init/cgroup.sh

@@ -1,10 +0,0 @@
-set -x
-
-mount -t tmpfs cgroup_root /sys/fs/cgroup
-
-subsys="pids cpuset cpu cpuacct blkio memory devices freezer net_cls perf_event net_prio hugetlb"
-
-for sys in $subsys; do
-    mkdir -p /sys/fs/cgroup/$sys
-    mount -t cgroup $sys -o $sys /sys/fs/cgroup/$sys/
-done

configs/zinit/init/modprobe.sh

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-modprobe fuse
-modprobe btrfs
-modprobe tun
-modprobe br_netfilter
-
-echo never > /sys/kernel/mm/transparent_hugepage/enabled
-
-ulimit -n 524288

configs/zinit/init/ntpd.sh

@@ -1,10 +0,0 @@
-#!/bin/sh
-
-ntp_flags=$(grep -o 'ntp=.*' /proc/cmdline | sed 's/^ntp=//')
-
-params=""
-if [ -n "$ntp_flags" ]; then
-  params=$(echo "-p $ntp_flags" | sed s/,/' -p '/g)
-fi
-
-exec ntpd -n $params

configs/zinit/init/routing.sh

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-echo "Enable ip forwarding"
-echo 1 > /proc/sys/net/ipv4/ip_forward

configs/zinit/init/shm.sh

@@ -1,3 +0,0 @@
-#!/bin/sh
-mkdir /dev/shm
-mount -t tmpfs shm /dev/shm 

configs/zinit/init/sshd-setup.sh

@@ -1,15 +0,0 @@
-#!/bin/ash
-if [ -f /etc/ssh/ssh_host_rsa_key ]; then
-    # ensure existing file permissions
-    chown root:root /etc/ssh/ssh_host_*
-    chmod 600 /etc/ssh/ssh_host_*
-    exit 0
-fi
-
-echo "Setting up sshd"
-mkdir -p /run/sshd
-
-ssh-keygen -f /etc/ssh/ssh_host_rsa_key -N '' -t rsa
-ssh-keygen -f /etc/ssh/ssh_host_dsa_key -N '' -t dsa
-ssh-keygen -f /etc/ssh/ssh_host_ecdsa_key -N '' -t ecdsa -b 521
-ssh-keygen -f /etc/ssh/ssh_host_ed25519_key -N '' -t ed25519

configs/zinit/init/udev.sh

@@ -1,4 +0,0 @@
-#!/bin/sh
-
-udevadm trigger --action=add
-udevadm settle

configs/zinit/lo.yaml

@@ -1,2 +0,0 @@
-exec: ip l set lo up
-oneshot: true

configs/zinit/local-modprobe.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/modprobe.sh
-oneshot: true

configs/zinit/mycelium.yaml

@@ -1,6 +0,0 @@
-exec: /usr/bin/mycelium --key-file /tmp/mycelium_priv_key.bin
-  --tun-name my0 --silent --peers tcp://188.40.132.242:9651 tcp://136.243.47.186:9651
-  tcp://185.69.166.7:9651 tcp://185.69.166.8:9651 tcp://65.21.231.58:9651 tcp://65.109.18.113:9651
-  tcp://209.159.146.190:9651 tcp://5.78.122.16:9651 tcp://5.223.43.251:9651 tcp://142.93.217.194:9651
-after:
-  - network

configs/zinit/network.yaml

@@ -1,5 +0,0 @@
-exec: dhcpcd eth0
-after:
-  - depmod
-  - udevd
-  - udev-trigger

configs/zinit/ntp.yaml

@@ -1,3 +0,0 @@
-exec: sh /etc/zinit/init/ntpd.sh
-after:
-  - network

configs/zinit/routing.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/routing.sh
-oneshot: true

configs/zinit/shm.yaml

@@ -1,2 +0,0 @@
-exec: /etc/zinit/init/shm.sh
-oneshot: true

configs/zinit/sshd-setup.yaml

@@ -1,2 +0,0 @@
-exec: sh /etc/zinit/init/sshd-setup.sh
-oneshot: true

configs/zinit/sshd.yaml

@@ -1,3 +0,0 @@
-exec: /usr/sbin/sshd -D -e
-after:
-    - sshd-setup

configs/zinit/udev-trigger.yaml

@@ -1,6 +0,0 @@
-exec: sh /etc/zinit/init/udev.sh
-oneshot: true
-after:
-  - depmod
-  - udevmon
-  - udevd

configs/zinit/udevd.yaml

@@ -1 +0,0 @@
-exec: udevd

configs/zinit/udevmon.yaml

@@ -1 +0,0 @@
-exec: udevadm monitor

docs/NOTES.md

@@ -0,0 +1,286 @@
+Zero-OS Builder – Working Notes and Repository Map
+
+Purpose
+- This document captures operational knowledge of this repository: build flow, key files, flags, and recent behavior decisions (e.g., passwordless root).
+- Links below point to exact functions and files for fast triage, using code navigation-friendly anchors.
+
+Repository Overview
+- Build entrypoint: [scripts/build.sh](scripts/build.sh)
+  - Orchestrates incremental stages using stage markers.
+  - Runs inside a container defined by [Dockerfile](Dockerfile) for reproducibility.
+- Common utilities and config loading: [bash.common.sh](scripts/lib/common.sh:1)
+  - Loads [config/build.conf](config/build.conf), normalizes directory paths, provides logging and safe execution wrappers.
+- Initramfs assembly and finalization: [bash.initramfs_* functions](scripts/lib/initramfs.sh:1)
+  - Copies components, sets up zinit configs, finalizes branding, creates CPIO archive, validates contents.
+- Kernel integration (optional embedded initramfs): [bash.kernel_* functions](scripts/lib/kernel.sh:1)
+  - Downloads/configures/builds kernel and modules, embeds initramfs, runs depmod.
+- zinit configuration: [config/zinit/](config/zinit/)
+  - YAML service definitions and init scripts used by zinit inside the initramfs rootfs.
+- RFS tooling (modules/firmware flists): [scripts/rfs/](scripts/rfs/)
+  - Packs module/firmware flists and embeds them into initramfs at /etc/rfs.
+
+Container Tooling (dev-container)
+- Base image: Alpine 3.22 in [Dockerfile](Dockerfile:1)
+- Tools:
+  - shadow (passwd/chpasswd): required for root password management in initramfs.
+  - openssl, openssl-dev: kept for other build steps and potential hashing utilities.
+  - build-base, rustup, kmod, upx, etc.: required by various build stages.
+- Removed: perl, not required for password handling after switching to passwd/chpasswd workflow.
+
+Configuration – build.conf
+- File: [config/build.conf](config/build.conf)
+- Key variables:
+  - Versions: ALPINE_VERSION, KERNEL_VERSION
+  - Directories (relative in config, normalized to absolute during runtime):
+    - INSTALL_DIR="initramfs"
+    - COMPONENTS_DIR="components"
+    - KERNEL_DIR="kernel"
+    - DIST_DIR="dist"
+  - Flags:
+    - ZEROOS_BRANDING="true"
+    - ZEROOS_REBRANDING="true"
+  - Branding behavior:
+    - ZEROOS_PASSWORDLESS_ROOT="true" (default for branded builds in current policy)
+    - ZEROOS_ROOT_PASSWORD_HASH / ROOT_PASSWORD_HASH (not used in current policy)
+    - ZEROOS_ROOT_PASSWORD / ROOT_PASSWORD (not used in current policy)
+  - FIRMWARE_TAG optional for reproducible firmware flist naming.
+
+Absolute Path Normalization
+- Location: [bash.common.sh](scripts/lib/common.sh:236)
+- After sourcing build.conf, the following variables are normalized to absolute paths anchored at PROJECT_ROOT:
+  - INSTALL_DIR, COMPONENTS_DIR, KERNEL_DIR, DIST_DIR
+- Rationale: Prevents path resolution errors when CWD changes (e.g., when kernel build operates in /workspace/kernel/current, validation now resolves to /workspace/initramfs instead of /workspace/kernel/current/initramfs).
+
+Build Pipeline – High Level
+- Orchestrator: [bash.main_build_process()](scripts/build.sh:214)
+  - Stage list:
+    - alpine_extract
+    - alpine_configure
+    - alpine_packages
+    - alpine_firmware
+    - components_build
+    - components_verify
+    - kernel_modules
+    - init_script
+    - components_copy
+    - zinit_setup
+    - modules_setup
+    - modules_copy
+    - cleanup
+    - rfs_flists
+    - validation
+    - initramfs_create
+    - initramfs_test
+    - kernel_build
+    - boot_tests
+  - Each stage wrapped with [bash.stage_run()](scripts/lib/stages.sh:99) and tracked under .build-stages/
+- Container use:
+  - Always run in container for stable toolchain (podman/docker auto-detected).
+  - Inside container, CWD normalized to PROJECT_ROOT.
+
+Initramfs Assembly – Key Functions
+- zinit setup: [bash.initramfs_setup_zinit()](scripts/lib/initramfs.sh:12)
+  - Copies [config/zinit](config/zinit/) into /etc/zinit, fixes perms, removes OpenRC remnants.
+- Install init script: [bash.initramfs_install_init_script()](scripts/lib/initramfs.sh:74)
+  - Installs [config/init](config/init) as /init in initramfs root.
+- Components copy: [bash.initramfs_copy_components()](scripts/lib/initramfs.sh:101)
+-   Installs built components (zinit/rfs/mycelium/corex/zosstorage) into proper locations, strips/UPX where applicable.
+- Modules setup: [bash.initramfs_setup_modules()](scripts/lib/initramfs.sh:229)
+  - Reads [config/modules.conf](config/modules.conf), resolves deps via [bash.initramfs_resolve_module_dependencies()](scripts/lib/initramfs.sh:318), generates stage1 list (firmware hints in modules.conf are ignored; firmware.conf is authoritative).
+- Create module scripts: [bash.initramfs_create_module_scripts()](scripts/lib/initramfs.sh:427)
+  - Writes /etc/zinit/init/stage1-modules.sh and stage2-modules.sh for zinit to load modules.
+- Binary size optimization: [bash.initramfs_strip_and_upx()](scripts/lib/initramfs.sh:491)
+- Final customization: [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+  - See “Branding behavior” below.
+- Create archive: [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688)
+  - Calls finalize, runs sanity checks, and creates initramfs.cpio.xz.
+- Validate: [bash.initramfs_validate()](scripts/lib/initramfs.sh:799)
+  - Ensures essential items exist, logs debug info:
+    - Prints “Validation debug:” lines showing input, PWD, PROJECT_ROOT, INSTALL_DIR, and resolved path.
+
+Kernel Integration
+- Get full kernel version: [bash.kernel_get_full_version()](scripts/lib/kernel.sh:13)
+- Apply config (embed initramfs): [bash.kernel_apply_config()](scripts/lib/kernel.sh:81)
+  - Updates CONFIG_INITRAMFS_SOURCE to the archive’s absolute path via [bash.kernel_modify_config_for_initramfs()](scripts/lib/kernel.sh:130).
+- Build kernel: [bash.kernel_build_with_initramfs()](scripts/lib/kernel.sh:173)
+- Build and install modules in container: [bash.kernel_build_modules()](scripts/lib/kernel.sh:228)
+  - Installs modules to /lib/modules/$FULL_VERSION in container, runs depmod -a.
+
+RFS Flists (modules/firmware)
+- Packing scripts:
+  - Modules: [bash.pack-modules.sh](scripts/rfs/pack-modules.sh:1)
+  - Firmware: [bash.pack-firmware.sh](scripts/rfs/pack-firmware.sh:1)
+- Firmware policy:
+  - For initramfs: [config/firmware.conf](config/firmware.conf) is the single source of truth for preinstalled firmware; modules.conf hints are ignored.
+  - For RFS: install all Alpine linux-firmware* packages into the build container and pack from /lib/firmware (full set for runtime).
+- Integrated in stage_rfs_flists:
+  - Embeds /etc/rfs/modules-<FULL_KERNEL_VERSION>.fl
+  - Embeds /etc/rfs/firmware-latest.fl (or tagged by FIRMWARE_TAG)
+  - See [bash.main_build_process() — stage_rfs_flists](scripts/build.sh:298)
+- Runtime mount/readiness:
+  - Firmware flist mounts over /lib/firmware (overmount hides any initramfs firmware).
+  - Modules flist mounts at /lib/modules/$(uname -r).
+  - Init scripts probe BASE_URL reachability (accepts FLISTS_BASE_URL or FLIST_BASE_URL) and wait for HTTP(S) before fetching:
+    - Firmware: [sh.firmware.sh](config/zinit/init/firmware.sh:1)
+    - Modules: [sh.modules.sh](config/zinit/init/modules.sh:1)
+
+Branding Behavior (Passwordless Root, motd/issue)
+- Finalization hook: [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+- Behavior (current policy):
+  - Passwordless root enforced using passwd for shadow-aware deletion:
+    - [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:616):
+      - passwd -d -R "${initramfs_dir}" root
+      - Ensures /etc/shadow has root:: (empty password) inside initramfs root, not host.
+  - Branding toggles: ZEROOS_BRANDING and ZEROOS_REBRANDING (branding guard printed in logs).
+  - Branding also updates /etc/motd and /etc/issue to Zero-OS.
+
+Console and getty
+- Early keyboard and debug:
+  - [config/init](config/init) preloads input/HID and USB HCD modules (i8042, atkbd, usbhid, hid, hid_generic, evdev, xhci/ehci/ohci/uhci) so console input works before zinit/rfs.
+  - Kernel cmdline initdebug=true opens an early interactive shell; if /init-debug exists and is executable, it runs preferentially.
+- Serial and console getty configs (zinit service YAML):
+  - [config/zinit/getty-tty1.yaml](config/zinit/getty-tty1.yaml)
+  - [config/zinit/getty-console.yaml](config/zinit/getty-console.yaml)
+- Optional ash login loop (not enabled unless referenced):
+  - [bash.ashloging.sh](config/zinit/init/ashloging.sh:1)
+
+Validation Diagnostics and Triage
+- Common error previously observed:
+  - “Initramfs directory not found: initramfs (resolved: /workspace/kernel/current/initramfs)”
+- Root cause:
+  - INSTALL_DIR re-sourced in a different CWD and interpreted as relative.
+- Fix:
+  - Absolute path normalization of INSTALL_DIR/COMPONENTS_DIR/KERNEL_DIR/DIST_DIR after sourcing build.conf in [bash.common.sh](scripts/lib/common.sh:236).
+  - Additional “Validation debug” prints added in [bash.initramfs_validate()](scripts/lib/initramfs.sh:799).
+- Expected logs now:
+  - “Validation debug: input='initramfs' PWD=/workspace PROJECT_ROOT=/workspace INSTALL_DIR=/workspace/initramfs”
+  - Resolves correctly even if called from a different stage CWD.
+
+How to Verify Passwordless Root
+- After build, check archive:
+  - mkdir -p dist/_inspect && cd dist/_inspect
+  - xz -dc ../initramfs.cpio.xz | cpio -idmv
+  - grep '^root:' ./etc/shadow
+  - Expect root:: (empty field) indicating passwordless root.
+- At runtime on console:
+  - When prompted for root’s password, press Enter.
+
+Stage System and Incremental Rebuilds
+- Stage markers stored in .build-stages/ (one file per stage).
+- Minimal rebuild helper (host or container):
+  - [scripts/rebuild-after-zinit.sh](scripts/rebuild-after-zinit.sh) clears only: modules_setup, modules_copy, init_script, zinit_setup, validation, initramfs_create, initramfs_test (kernel_build only with --with-kernel; kernel_modules only with --refresh-container-mods).
+  - Flags:
+    - --with-kernel (also rebuild kernel; ensures cpio is recreated right before embedding)
+    - --refresh-container-mods (rebuild container /lib/modules for fresh containers)
+    - --verify-only (report changed files and stage status; no rebuild)
+  - Shows stage status before/after marker removal; no --rebuild-from is passed by default (relies on markers only).
+- Manual minimal rebuild:
+  - Remove relevant .done files, e.g.: initramfs_create.done initramfs_test.done validation.done
+  - Rerun: DEBUG=1 ./scripts/build.sh
+- Show status:
+  - ./scripts/build.sh --show-stages
+- Test built kernel:
+  - ./runit.sh --hypervisor qemu
+  - ./runit.sh --hypervisor ch --disks 5 --reset
+
+Key Decisions (current)
+- Firmware selection for initramfs comes exclusively from [config/firmware.conf](config/firmware.conf); firmware hints in modules.conf are ignored to avoid duplication/mismatch.
+- Runtime firmware flist overmounts /lib/firmware after network readiness; init scripts wait for FLISTS_BASE_URL/FLIST_BASE_URL HTTP reachability before fetching.
+- Early keyboard and debug shell added to [config/init](config/init) as described above.
+- Branding enforces passwordless root via passwd -d -R inside initramfs finalization, avoiding direct edits of passwd/shadow files.
+- Directory paths normalized to absolute after loading config to avoid CWD-sensitive behavior.
+- Container image contains shadow suite to ensure passwd/chpasswd availability; perl removed.
+
+File Pointers (quick jump)
+- Orchestrator: [scripts/build.sh](scripts/build.sh)
+- Common and config loading: [bash.common.sh](scripts/lib/common.sh:1)
+- Finalization hook: [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+- Validation entry: [bash.initramfs_validate()](scripts/lib/initramfs.sh:799)
+- CPIO creation: [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688)
+- Kernel embed config: [bash.kernel_modify_config_for_initramfs()](scripts/lib/kernel.sh:130)
+- RFS packers: [bash.pack-modules.sh](scripts/rfs/pack-modules.sh:1), [bash.pack-firmware.sh](scripts/rfs/pack-firmware.sh:1)
+- USB creator: [scripts/make-grub-usb.sh](scripts/make-grub-usb.sh)
+
+Change Log
+- 2025-09-09:
+  - Enforce passwordless root using passwd -d -R in finalization.
+  - Normalize INSTALL_DIR/COMPONENTS_DIR/KERNEL_DIR/DIST_DIR to absolute paths post-config load.
+  - Add validation diagnostics prints (input/PWD/PROJECT_ROOT/INSTALL_DIR/resolved).
+  - Ensure shadow package in container for passwd/chpasswd; keep openssl and openssl-dev; remove perl earlier.
+- 2025-10-10:
+  - Record zosstorage as a standard component installed during [bash.initramfs_copy_components()](scripts/lib/initramfs.sh:101) and sync component documentation references.
+Updates 2025-10-01
+
+- Function index regenerated: see [scripts/functionlist.md](scripts/functionlist.md) for an authoritative map of all functions with current line numbers. Use it alongside the quick links below to jump into code fast.
+- Key jump-points (current lines):
+  - Finalization: [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:568)
+  - CPIO creation: [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:691)
+  - Validation: [bash.initramfs_validate()](scripts/lib/initramfs.sh:820)
+  - Kernel embed config: [bash.kernel_modify_config_for_initramfs()](scripts/lib/kernel.sh:130)
+  - Stage orchestrator entry: [bash.main_build_process()](scripts/build.sh:214)
+  - Repo-wide index: [scripts/functionlist.md](scripts/functionlist.md)
+
+Roadmap / TODO (tracked in tool todo list)
+
+- Zosception (zinit service graph and ordering)
+  - Define additional services and ordering for nested/recursive orchestration.
+  - Likely integration points:
+    - Networking readiness before RFS: [config/zinit/network.yaml](config/zinit/network.yaml)
+    - Early udev coldplug: [config/zinit/udev-trigger.yaml](config/zinit/udev-trigger.yaml)
+    - Post-RFS coldplug: [config/zinit/udev-rfs.yaml](config/zinit/udev-rfs.yaml)
+  - Ensure dependency edges are correct in the service DAG image (see docs/img_*.png).
+
+- Add zosstorage to initramfs
+  - Source:
+    - If packaged: add to [config/packages.list](config/packages.list).
+    - If built from source: extend [bash.components_parse_sources_conf()](scripts/lib/components.sh:13) and add a build_* function; install via [bash.initramfs_copy_components()](scripts/lib/initramfs.sh:102).
+  - Zinit unit:
+    - Add YAML under [config/zinit/](config/zinit/) and hook into the network-ready path.
+  - Ordering:
+    - Start after "network" and before/with RFS mounts if it provides storage functionality used by rfs.
+
+- RFS blob store backends (design + docs; http and s3 exist)
+  - Current S3 store URI construction: [bash.rfs_common_build_s3_store_uri()](scripts/rfs/common.sh:137)
+  - Flist manifest store patching: [bash.rfs_common_patch_flist_stores()](scripts/rfs/common.sh:385)
+  - Route URL patching: [bash.rfs_common_patch_flist_route_url()](scripts/rfs/common.sh:494)
+  - Packers entrypoints:
+    - [scripts/rfs/pack-modules.sh](scripts/rfs/pack-modules.sh:1)
+    - [scripts/rfs/pack-firmware.sh](scripts/rfs/pack-firmware.sh:1)
+  - Proposed additional backend: RESP/DB-style store
+    - Goal: Allow rfs to push/fetch content-addressed blobs via a RESP-compatible endpoint (e.g., Redis/KeyDB/Dragonfly-like), or a thin HTTP/RESP adapter.
+    - Draft URI scheme examples:
+      - resp://host:port/db?tls=0&amp;prefix=blobs
+      - resp+tls://host:port/db?prefix=blobs&amp;ca=/etc/ssl/certs/ca.pem
+      - resp+sentinel://sentinelHost:26379/mymaster?prefix=blobs
+    - Minimum operations:
+      - PUT blob: SETEX prefix/ab/cd/hash ttl file-bytes or HSET prefix/hash data file-bytes
+      - GET blob: GET or HGET
+      - HEAD/exists: EXISTS
+      - Optional: pipelined/mget for batch prefetch
+    - Client integration layers:
+      - Pack-time: extend rfs CLI store resolver (design doc first; scripts/rfs/common.sh can map scheme→uploader if CLI not ready).
+      - Manifest post-process: still supported; stores table may include multiple URIs (s3 + resp) for redundancy.
+    - Caching and retries:
+      - Local on-disk cache under dist/.rfs-cache keyed by hash with LRU GC.
+      - Exponential backoff on GET failures; fall back across stores in order.
+    - Auth:
+      - RESP: optional username/password in URI; TLS with cert pinning parameters.
+      - Keep secrets in config/rfs.conf or env; do not embed write creds in manifests (read-credential routes only).
+    - Deliverables:
+      - Design section in docs/rfs-flists.md (to be added)
+      - Config keys in config/rfs.conf.example for RESP endpoints
+      - Optional shim uploader script if CLI support lags.
+
+- Documentation refresh tasks
+  - Cross-check this file’s clickable references against [scripts/functionlist.md](scripts/functionlist.md) after changes in lib files.
+  - Keep “Branding behavior” and “Absolute Path Normalization” pointers aligned with:
+    - [bash.common.sh normalization](scripts/lib/common.sh:244)
+    - [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:568)
+
+Diagnostics-first reminder
+
+- Use DEBUG=1 and stage markers for minimal rebuilds.
+- Quick commands:
+  - Show stages: ./scripts/build.sh --show-stages
+  - Minimal rebuild after zinit/init edits: [scripts/rebuild-after-zinit.sh](scripts/rebuild-after-zinit.sh)
+  - Validate archive: [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:691), then [bash.initramfs_test_archive()](scripts/lib/initramfs.sh:953)

docs/PROMPT.md

@@ -0,0 +1,202 @@
+You are Kilo Code, an expert software debugger for this Zero-OS Alpine Initramfs Builder repository.
+
+Mission
+- Be a precise, surgical debugger and maintainer for this repo.
+- Default to minimal-change fixes with explicit logging to validate assumptions.
+- For any suspected root cause, add diagnostics first, confirm in logs, then implement the fix.
+- Always show function-and-file context via clickable references like [bash.some_function()](scripts/file.sh:123).
+- Use the staged, incremental build pipeline; never rebuild more than necessary.
+
+Repository map (jump-points)
+- Build entrypoint and stages:
+  - [scripts/build.sh](scripts/build.sh)
+  - Orchestrator main: [bash.main_build_process()](scripts/build.sh:214)
+  - Kernel build stage wrapper: [bash.stage_kernel_build()](scripts/build.sh:398)
+  - Initramfs create stage: [bash.stage_initramfs_create()](scripts/build.sh:374)
+  - Initramfs test stage: [bash.stage_initramfs_test()](scripts/build.sh:385)
+  - Stages infra: [bash.stage_run()](scripts/lib/stages.sh:99), [scripts/lib/stages.sh](scripts/lib/stages.sh)
+- Common utilities and config:
+  - Config load, logging, path normalization: [bash.common.sh](scripts/lib/common.sh:1)
+  - Absolute path normalization for INSTALL_DIR, COMPONENTS_DIR, KERNEL_DIR, DIST_DIR: [bash.common.sh](scripts/lib/common.sh:236)
+- Initramfs assembly:
+  - All initramfs functions: [scripts/lib/initramfs.sh](scripts/lib/initramfs.sh)
+  - Final customization hook (branding, dirs, ntp): [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+  - Create archive (pre-CPIO checks, call finalize): [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688)
+  - Validate contents (with new diagnostics): [bash.initramfs_validate()](scripts/lib/initramfs.sh:799)
+- Kernel integration:
+  - Kernel helpers: [scripts/lib/kernel.sh](scripts/lib/kernel.sh)
+  - Embed initramfs in config: [bash.kernel_modify_config_for_initramfs()](scripts/lib/kernel.sh:130)
+- Zinit config and init scripts (inside initramfs):
+  - zinit YAML/services: [config/zinit/](config/zinit/)
+  - Modules mount script: [sh.modules.sh](config/zinit/init/modules.sh:1)
+  - Firmware mount script: [sh.firmware.sh](config/zinit/init/firmware.sh:1)
+  - Network, ntpd, etc: [config/zinit/init/](config/zinit/init/)
+- RFS flists tooling:
+  - Modules packer: [bash.pack-modules.sh](scripts/rfs/pack-modules.sh:1)
+  - Firmware packer: [bash.pack-firmware.sh](scripts/rfs/pack-firmware.sh:1)
+- Boot media utility:
+  - GRUB USB creator: [scripts/make-grub-usb.sh](scripts/make-grub-usb.sh)
+
+High-priority behaviors and policies
+1) Branding passwordless root (shadow-aware)
+- Implemented in finalize via passwd (no manual file edits):
+  - [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+  - Deletes root password inside initramfs using chroot: chroot ${initramfs_dir} passwd -d root
+  - This ensures /etc/shadow has root:: and console login is passwordless when branding is enabled.
+
+2) Path normalization (prevents “resolved under kernel/current” errors)
+- After loading [config/build.conf](config/build.conf), key directories are normalized to absolute paths:
+  - [bash.common.sh](scripts/lib/common.sh:236)
+- Prevents validation resolving INSTALL_DIR relative to CWD (e.g., /workspace/kernel/current/initramfs).
+
+3) Initramfs essential directories guarantee
+- During finalize, enforce presence of essential dirs including /home:
+  - [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+- Pre-CPIO essential check includes “home”:
+  - [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:680)
+
+4) Remote flist fallback + readiness (modules + firmware)
+- When local manifests are missing, fetch from zos.grid.tf and mount via rfs:
+  - Firmware: [sh.firmware.sh](config/zinit/init/firmware.sh:1)
+    - BASE_URL from FLISTS_BASE_URL (or FLIST_BASE_URL alias), default https://zos.grid.tf/store/flists
+    - Probes BASE_URL for HTTP(S) readiness (wget --spider) before fetching firmware-latest.fl
+    - Fetch path: ${BASE_URL%/}/firmware-latest.fl to /etc/rfs/firmware-latest.fl
+  - Modules: [sh.modules.sh](config/zinit/init/modules.sh:1)
+    - BASE_URL from FLISTS_BASE_URL (or FLIST_BASE_URL alias)
+    - Probes BASE_URL for HTTP(S) readiness before fetching modules-$(uname -r)-Zero-OS.fl
+- Env overrides:
+  - FIRMWARE_FLIST, MODULES_FLIST: use local file if provided
+  - RFS_BIN: defaults to rfs
+  - FLISTS_BASE_URL or FLIST_BASE_URL: override base URL
+- wget is available (initramfs includes it); scripts prefer wget, fallback to busybox wget if needed.
+
+5) Incremental build guards
+- Kernel build now defaults INITRAMFS_ARCHIVE if unset (fix for unbound var on incremental runs):
+  - [bash.stage_kernel_build()](scripts/build.sh:398)
+- Initramfs test stage already guards INITRAMFS_ARCHIVE:
+  - [bash.stage_initramfs_test()](scripts/build.sh:385)
+
+6) Early keyboard input and debug shell
+- Early HID/input and USB HCD modules are preloaded before zinit to ensure console usability:
+  - [config.init](config/init:80)
+- Debug hook: kernel cmdline initdebug=true runs /init-debug if present or drops to a shell:
+  - [config.init](config/init:115)
+
+Flags and config
+- Config file: [config/build.conf](config/build.conf)
+- Branding flags:
+  - ZEROOS_BRANDING="true"
+  - ZEROOS_REBRANDING="true"
+- Branding password behavior:
+  - ZEROOS_PASSWORDLESS_ROOT="true" (current default behavior for branded builds)
+  - If switching to password-based later (not current policy), prefer using chpasswd with -R (requires minimal re-enable).
+- Directories (relative in config, normalized to abs at runtime):
+  - INSTALL_DIR="initramfs"
+  - COMPONENTS_DIR="components"
+  - KERNEL_DIR="kernel"
+  - DIST_DIR="dist"
+- Firmware policies:
+  - Initramfs: [config/firmware.conf](config/firmware.conf) is authoritative; modules.conf firmware hints are ignored.
+  - RFS: full Alpine firmware set is installed into container and packed from /lib/firmware (see [bash.pack-firmware.sh](scripts/rfs/pack-firmware.sh:1)).
+- Firmware flist naming tag:
+  - FIRMWARE_TAG (env > config > “latest”)
+- Container image tools (podman rootless OK) defined by [Dockerfile](Dockerfile):
+  - Key packages: shadow (passwd/chpasswd), openssl, openssl-dev, build-base, rustup, kmod, upx, wget, etc.
+
+Diagnostics-first workflow (strict)
+- For any failure, first collect specific logs:
+  - Enable DEBUG=1 for verbose logs.
+  - Re-run only the impacted stage if possible:
+    - Example: rm -f .build-stages/validation.done && DEBUG=1 ./scripts/build.sh
+- Use existing diagnostics:
+  - Branding debug lines: [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+  - Validation debug lines (input, PWD, PROJECT_ROOT, INSTALL_DIR, resolved): [bash.initramfs_validate()](scripts/lib/initramfs.sh:799)
+  - Pre-CPIO sanity listing and essential checks: [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688)
+- Only after validation confirms the hypothesis, apply the minimal fix.
+
+Common tasks and commands
+- Full incremental build (always inside container):
+  - DEBUG=1 ./scripts/build.sh
+- Minimal rebuild of last steps:
+  - rm -f .build-stages/initramfs_create.done .build-stages/initramfs_test.done .build-stages/validation.done
+  - DEBUG=1 ./scripts/build.sh
+- Validation only:
+  - rm -f .build-stages/validation.done
+  - DEBUG=1 ./scripts/build.sh
+- Show stage status:
+  - ./scripts/build.sh --show-stages
+- Test built kernel:
+  - ./runit.sh --hypervisor qemu
+  - ./runit.sh --hypervisor ch --disks 5
+
+Checklists and helpers
+
+A) Diagnose “passwordless root not working”
+- Confirm branding flags are loaded:
+  - Check “Branding debug:” lines in logs from [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+- Confirm /etc/shadow was updated in initramfs:
+  - Extract dist/initramfs.cpio.xz to a temp dir and grep '^root:' etc/shadow; expect root::
+- If not present:
+  - Ensure passwd is available in container (comes from shadow package): [Dockerfile](Dockerfile)
+  - Check we use chroot ${initramfs_dir} passwd -d root (not --root or direct file edits): [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:592)
+
+B) Fix “Initramfs directory not found: initramfs (resolved: /workspace/kernel/current/initramfs)”
+- Confirm absolute path normalization after config load:
+  - [bash.common.sh](scripts/lib/common.sh:236)
+- Confirm validation prints “Validation debug:” with resolved absolute path:
+  - [bash.initramfs_validate()](scripts/lib/initramfs.sh:799)
+
+C) Minimal rebuild after zinit/init/modules.conf changes
+- Use the helper (works from host or container):
+  - scripts/rebuild-after-zinit.sh
+    - Defaults: initramfs-only; clears only modules_setup, modules_copy, init_script, zinit_setup, validation, initramfs_create, initramfs_test
+    - Flags:
+      - --with-kernel: also rebuild kernel; cpio is recreated immediately before embedding
+      - --refresh-container-mods: rebuild container /lib/modules for fresh containers
+      - --verify-only: report changed files and stage status; no rebuild
+  - Stage status is printed before/after marker removal; the helper avoids --rebuild-from by default to prevent running early stages.
+- Manual fallback:
+  - rm -f .build-stages/initramfs_create.done .build-stages/initramfs_test.done .build-stages/validation.done
+  - DEBUG=1 ./scripts/build.sh
+
+D) INITRAMFS_ARCHIVE unbound during kernel build stage
+- stage_kernel_build now defaults INITRAMFS_ARCHIVE if unset:
+  - [bash.stage_kernel_build()](scripts/build.sh:398)
+- If error persists, ensure stage_initramfs_create ran or that defaulting logic sees dist/initramfs.cpio.xz.
+
+E) Modules/firmware not found by rfs init scripts
+- Confirm local manifests under /etc/rfs or remote fallback:
+  - Firmware: [sh.firmware.sh](config/zinit/init/firmware.sh:1)
+  - Modules: [sh.modules.sh](config/zinit/init/modules.sh:1)
+- For remote:
+  - Set FLISTS_BASE_URL or FLIST_BASE_URL; default is https://zos.grid.tf/store/flists
+  - Scripts probe BASE_URL readiness (wget --spider) before fetch
+  - Firmware target is /lib/firmware; modules target is /lib/modules/$(uname -r)
+- Confirm uname -r matches remote naming “modules-$(uname -r)-Zero-OS.fl”
+- Confirm wget present (or busybox wget)
+
+Project conventions
+- Edit policy:
+  - Use minimal, localized changes; keep behavior and structure intact unless necessary.
+  - Add diagnostics before fixing; confirm in logs.
+- Commit policy:
+  - Write clear, component-scoped messages (e.g., “initramfs: …”, “build: …”, “zinit(init): …”).
+- Ask-first policy:
+  - Ask to confirm diagnoses before full fixes when the outcome is uncertain.
+  - Provide 2–3 concrete paths forward.
+
+Key files to keep in sync with behavior decisions
+- Branding and finalization: [bash.initramfs_finalize_customization()](scripts/lib/initramfs.sh:575)
+- Validation diagnostics: [bash.initramfs_validate()](scripts/lib/initramfs.sh:799)
+- Archive creation (pre-CPIO checks): [bash.initramfs_create_cpio()](scripts/lib/initramfs.sh:688)
+- Path normalization after config: [bash.common.sh](scripts/lib/common.sh:236)
+- Modules/firmware remote fallback + readiness: [sh.modules.sh](config/zinit/init/modules.sh:1), [sh.firmware.sh](config/zinit/init/firmware.sh:1)
+- Kernel stage defaulting for archive: [bash.stage_kernel_build()](scripts/build.sh:398)
+- GRUB USB creator: [scripts/make-grub-usb.sh](scripts/make-grub-usb.sh)
+- Operational notes: [docs/NOTES.md](docs/NOTES.md)
+
+When in doubt
+- Prefer adding logs over guessing.
+- Verify STAGES_DIR markers to avoid stale incremental state: [scripts/lib/stages.sh](scripts/lib/stages.sh)
+- Normalize to PROJECT_ROOT inside container before stages if CWD shifts.
+- Use DEBUG=1 to see safe_execute echo commands and outputs.

docs/TODO.md

@@ -0,0 +1,73 @@
+# Zero-OS Builder – Persistent TODO
+
+This canonical checklist is the single source of truth for ongoing work. It mirrors the live task tracker but is versioned in-repo for review and PRs. Jump-points reference exact functions and files for quick triage.
+
+## High-level
+
+- [x] Regenerate repository function index: [scripts/functionlist.md](../scripts/functionlist.md)
+- [x] Refresh NOTES with jump-points and roadmap: [docs/NOTES.md](NOTES.md)
+- [x] Extend RFS design with RESP/DB-style backend: [docs/rfs-flists.md](rfs-flists.md)
+- [x] Make Rust components Git fetch non-destructive: [bash.components_download_git()](../scripts/lib/components.sh:72)
+- [ ] Update zinit config for "zosception" workflow: [config/zinit/](../config/zinit/)
+- [ ] Add zosstorage to the initramfs (package/build/install + zinit unit)
+- [ ] Validate via minimal rebuild and boot tests; refine depmod/udev docs
+- [ ] Commit and push documentation and configuration updates (post-zosception/zosstorage)
+
+## Zosception (zinit service graph and ordering)
+
+- [ ] Define service graph changes and ordering constraints
+  - Reference current triggers:
+    - Early coldplug: [config/zinit/udev-trigger.yaml](../config/zinit/udev-trigger.yaml)
+    - Network readiness: [config/zinit/network.yaml](../config/zinit/network.yaml)
+    - Post-mount coldplug: [config/zinit/udev-rfs.yaml](../config/zinit/udev-rfs.yaml)
+- [ ] Add/update units under [config/zinit/](../config/zinit/) with proper after/needs/wants
+- [ ] Validate with stage runner and logs
+  - Stage runner: [bash.stage_run()](../scripts/lib/stages.sh:99)
+  - Main flow: [bash.main_build_process()](../scripts/build.sh:214)
+
+## ZOS Storage in initramfs
+
+- [ ] Decide delivery mechanism:
+  - [ ] APK via [config/packages.list](../config/packages.list)
+  - [ ] Source build via [bash.components_parse_sources_conf()](../scripts/lib/components.sh:13) with a new build function
+- [ ] Copy/install into initramfs
+  - Components copy: [bash.initramfs_copy_components()](../scripts/lib/initramfs.sh:102)
+  - Zinit setup: [bash.initramfs_setup_zinit()](../scripts/lib/initramfs.sh:13)
+- [ ] Create zinit unit(s) for zosstorage startup and ordering
+  - Place after network and before RFS if it provides storage used by rfs
+- [ ] Add smoke command to confirm presence in image (e.g., which/--version) during [bash.initramfs_validate()](../scripts/lib/initramfs.sh:820)
+
+## RFS backends — implementation follow-up (beyond design)
+
+- [ ] RESP uploader shim for packers (non-breaking)
+  - Packers entrypoints: [scripts/rfs/pack-modules.sh](../scripts/rfs/pack-modules.sh), [scripts/rfs/pack-firmware.sh](../scripts/rfs/pack-firmware.sh)
+  - Config loader: [bash.rfs_common_load_rfs_s3_config()](../scripts/rfs/common.sh:82) → extend to parse RESP_* (non-breaking)
+  - Store URI builder (S3 exists): [bash.rfs_common_build_s3_store_uri()](../scripts/rfs/common.sh:137)
+  - Manifest patching remains:
+    - Stores table: [bash.rfs_common_patch_flist_stores()](../scripts/rfs/common.sh:385)
+    - route.url: [bash.rfs_common_patch_flist_route_url()](../scripts/rfs/common.sh:494)
+- [ ] Connectivity checks and retries for RESP path
+- [ ] Local cache for pack-time (optional)
+
+## Validation and boot tests
+
+- [ ] Minimal rebuild after zinit/units/edit
+  - Helper: [scripts/rebuild-after-zinit.sh](../scripts/rebuild-after-zinit.sh)
+- [ ] Validate contents before CPIO
+  - Create: [bash.initramfs_create_cpio()](../scripts/lib/initramfs.sh:691)
+  - Validate: [bash.initramfs_validate()](../scripts/lib/initramfs.sh:820)
+- [ ] QEMU / cloud-hypervisor smoke tests
+  - Test runner: [runit.sh](../runit.sh)
+- [ ] Kernel embed path and versioning sanity
+  - Embed config: [bash.kernel_modify_config_for_initramfs()](../scripts/lib/kernel.sh:130)
+  - Full version logic: [bash.kernel_get_full_version()](../scripts/lib/kernel.sh:14)
+
+## Operational conventions (keep)
+
+- [ ] Diagnostics-first changes; add logs before fixes
+- [ ] Absolute path normalization respected
+  - Normalization: [scripts/lib/common.sh](../scripts/lib/common.sh:244)
+
+Notes
+- Keep this file in sync with the live tracker. Reference it in PR descriptions.
+- Use the clickable references above for rapid navigation.

docs/depmod-behavior.md

@@ -0,0 +1,71 @@
+# depmod behavior, impact on lazy-mounted module stores, and flist store rewriting
+
+Summary (short answer)
+- depmod builds the modules dependency/alias databases by scanning the modules tree under /lib/modules/<kernel>. It reads metadata from each .ko file (.modinfo section) to generate:
+  - modules.dep(.bin), modules.alias(.bin), modules.symbols(.bin), modules.devname, modules.order, etc.
+- It does not load modules; it opens many files for small reads. On a lazy store, the first depmod run can trigger many object fetches.
+- If modules metadata files are already present and consistent (as produced during build), modprobe can work without re-running depmod. Use depmod -A (update only) or skip depmod entirely if timestamps and paths are unchanged.
+- For private S3 (garage) without anonymous read, post-process the .fl manifest to replace the store URI with your HTTPS web endpoint for that bucket, so runtime mounts fetch over the web endpoint instead of signed S3.
+
+Details
+
+1) What depmod actually reads/builds
+- Inputs scanned under /lib/modules/<kernel>:
+  - .ko files: depmod reads ELF .modinfo to collect depends=, alias=, vermagic, etc. It does not execute or load modules.
+  - modules.builtin and modules.builtin.modinfo: indicate built-in drivers so they are excluded from dep graph.
+  - Optional flags:
+    - depmod -F <System.map> and -E <Module.symvers> allow symbol/CRC checks; these are typically not required on target systems for generating dependency/alias maps.
+- Outputs (consumed by modprobe/kmod):
+  - modules.dep and modules.dep.bin: dependency lists and fast index
+  - modules.alias and modules.alias.bin: modalias to module name mapping
+  - modules.symbols(.bin), modules.devname, modules.order, etc.
+
+Key property: depmod’s default operation opens many .ko files to read .modinfo, which on a lazy FUSE-backed store causes many small reads.
+
+2) Recommended strategy with lazy flists
+- Precompute metadata during build:
+  - In the dev container, your pipeline already runs depmod (see [kernel_build_modules()](scripts/lib/kernel.sh:228)). Ensure the resulting metadata files in /lib/modules/<kernel> are included in the modules flist.
+- At runtime after overmounting the modules flist:
+  - Option A: Do nothing. If your path is the same (/lib/modules/<kernel>), modprobe will use the precomputed .bin maps and will not need to rescan .ko files. This minimizes object fetches (only when a module is actually loaded).
+  - Option B: Run depmod -A <kernel> (update only if any .ko newer than modules.dep). This typically performs stats on files and only rebuilds if needed, avoiding a full read of all .ko files.
+  - Option C: Run depmod -a only if you changed the module set or path layout. Expect many small reads on first run.
+
+3) Firmware implications
+- No depmod impact, but udev coldplug will probe devices. Keep firmware files accessible via the firmware flist mount (e.g., /lib/firmware).
+- Since firmware loads on-demand by the kernel/driver, the lazy store will fetch only needed blobs.
+
+4) Post-processing .fl to use a web endpoint (garage S3 private)
+- Goal: Pack/upload blobs to private S3 using credentials, but ship a manifest (.fl) that references a public HTTPS endpoint (or authenticated gateway) that your rfs mount can fetch from without S3 signing.
+- Approach A: Use rfs CLI (if supported) to edit store URIs within the manifest.
+  - Example (conceptual): rfs flist edit-store -m dist/flists/modules-...fl --set https://web.example.com/bucket/prefix
+- Approach B: Use sqlite3 to patch the manifest directly (the .fl is sqlite):
+  - Inspect stores:
+    - sqlite3 dist/flists/modules-...fl "SELECT id, uri FROM stores;"
+  - Replace s3 store with web endpoint:
+    - sqlite3 dist/flists/modules-...fl "UPDATE stores SET uri='https://web.example.com/bucket/prefix' WHERE uri LIKE 's3://%';"
+  - Validate:
+    - rfs flist inspect dist/flists/modules-...fl
+- Notes:
+  - The web endpoint you provide must serve the same content-addressed paths that rfs expects. Confirm the object path layout (e.g., /bucket/prefix/ab/cd/abcdef...).
+  - You can maintain multiple store rows to provide fallbacks (if rfs supports trying multiple stores).
+
+5) Suggested runtime sequence after overmount (with precomputed metadata)
+- Mount modules flist read-only at /lib/modules/<kernel>.
+- Optionally depmod -A <kernel> (cheap; no full scan).
+- udevadm control --reload; udevadm trigger --action=add; udevadm settle
+- Load required baseline modules (stage1) if needed; the lazy store ensures only requested .ko files are fetched.
+
+6) Practical checklist for our scripts
+- Ensure pack-modules includes:
+  - /lib/modules/<kernel>/*.ko*
+  - All modules.* metadata files (dep, alias, symbols, order, builtin, *.bin)
+- After pack completes and blobs are uploaded to S3, patch the .fl manifest’s stores table to the public HTTPS endpoint of your garage bucket/web gateway.
+- Provide verify utilities:
+  - rfs flist inspect/tree
+  - Optional local mount test against the web endpoint referenced in the manifest.
+
+Appendix: Commands and flags
+- Generate/update metadata (build-time): depmod -a <kernel>
+- Fast update at boot: depmod -A <kernel>  # only if newer/changed
+- Chroot/base path (useful for initramfs image pathing): depmod -b <base> -a <kernel>
+- Modprobe uses *.bin maps when present, which avoids parsing large text maps on every lookup.

docs/review-rfs-integration.md

@@ -0,0 +1,178 @@
+# Review: Current Build Flow and RFS Integration Hook Points
+
+This document reviews the current Zero-OS Alpine initramfs build flow, identifies reliable sources for kernel versioning and artifacts, and specifies clean integration points for RFS flist generation and later runtime overmounts without modifying existing code paths.
+
+## Build flow overview
+
+Primary orchestrator: [scripts/build.sh](scripts/build.sh)
+
+Key sourced libraries:
+- [alpine.sh](scripts/lib/alpine.sh)
+- [components.sh](scripts/lib/components.sh)
+- [kernel.sh](scripts/lib/kernel.sh)
+- [initramfs.sh](scripts/lib/initramfs.sh)
+- [stages.sh](scripts/lib/stages.sh)
+- [docker.sh](scripts/lib/docker.sh)
+
+Main stages executed (incremental via [stage_run()](scripts/lib/stages.sh:99)):
+1) alpine_extract, alpine_configure, alpine_packages
+2) alpine_firmware
+3) components_build, components_verify
+4) kernel_modules
+5) init_script, components_copy, zinit_setup
+6) modules_setup, modules_copy
+7) cleanup, validation
+8) initramfs_create, initramfs_test, kernel_build
+9) boot_tests
+
+## Where key artifacts come from
+
+- Kernel full version:
+  - Derived deterministically using [kernel_get_full_version()](scripts/lib/kernel.sh:14)
+  - Computed as: KERNEL_VERSION from [config/build.conf](config/build.conf) + CONFIG_LOCALVERSION from [config/kernel.config](config/kernel.config)
+  - Example target: 6.12.44-Zero-OS
+
+- Built modules in container:
+  - Stage: [kernel_build_modules()](scripts/lib/kernel.sh:228)
+  - Builds and installs into container root: /lib/modules/<FULL_VERSION>
+  - Runs depmod in container and sets:
+    - CONTAINER_MODULES_PATH=/lib/modules/<FULL_VERSION>
+    - KERNEL_FULL_VERSION=<FULL_VERSION>
+
+- Initramfs modules copy and metadata:
+  - Stage: [initramfs_copy_resolved_modules()](scripts/lib/initramfs.sh:846)
+  - Copies selected modules and dep metadata into initramfs under initramfs/lib/modules/<FULL_VERSION>
+
+- Firmware content:
+  - Preferred (per user): a full tree at $root/firmware in the dev-container, intended to be packaged as-is
+  - Fallback within build flow: firmware packages installed by [alpine_install_firmware()](scripts/lib/alpine.sh:392) into initramfs/lib/firmware
+
+- rfs binary:
+  - Built via [build_rfs()](scripts/lib/components.sh:299) into [components/rfs/target/x86_64-unknown-linux-musl/release/rfs](components/rfs/target/x86_64-unknown-linux-musl/release/rfs)
+  - Also expected to be available on PATH inside dev-container
+
+## udev and module load sequencing at runtime
+
+- zinit units present:
+  - udevd: [config/zinit/udevd.yaml](config/zinit/udevd.yaml)
+  - depmod: [config/zinit/depmod.yaml](config/zinit/depmod.yaml)
+  - udev trigger: [config/zinit/udev-trigger.yaml](config/zinit/udev-trigger.yaml) calling [udev.sh](config/zinit/init/udev.sh)
+
+- initramfs module orchestration:
+  - Module resolution logic: [initramfs_setup_modules()](scripts/lib/initramfs.sh:225) and [initramfs_resolve_module_dependencies()](scripts/lib/initramfs.sh:313)
+  - Load scripts created for zinit:
+    - stage1: [initramfs_create_module_scripts()](scripts/lib/initramfs.sh:422) emits /etc/zinit/init/stage1-modules.sh
+    - stage2 is currently disabled in config
+
+## Current integration gaps for RFS flists
+
+- There is no existing code that:
+  - Packs modules or firmware into RFS flists (.fl sqlite manifests)
+  - Publishes associated content-addressed blobs to a store
+  - Uploads the .fl manifest to an S3 bucket (separate from the blob store)
+  - Mounts these flists at runtime prior to udev coldplug
+
+## Reliable inputs for RFS pack
+
+- Kernel full version: use [kernel_get_full_version()](scripts/lib/kernel.sh:14) logic (never `uname -r` inside container)
+- Modules source tree candidates (priority):
+  1) /lib/modules/<FULL_VERSION> (from [kernel_build_modules()](scripts/lib/kernel.sh:228))
+  2) initramfs/lib/modules/<FULL_VERSION> (if container path unavailable; less ideal)
+- Firmware source tree candidates (priority):
+  1) $PROJECT_ROOT/firmware (external provided tree; user-preferred)
+  2) initramfs/lib/firmware (APK-installed fallback)
+
+## S3 configuration needs
+
+A new configuration file is required to avoid touching existing code:
+- Path: config/rfs.conf (to be created)
+- Required keys:
+  - S3_ENDPOINT (e.g., https://s3.example.com:9000)
+  - S3_REGION
+  - S3_BUCKET
+  - S3_PREFIX (path prefix under bucket for blobs/optionally manifests)
+  - S3_ACCESS_KEY
+  - S3_SECRET_KEY
+- These values will be consumed by standalone scripts (not existing build flow)
+
+## Proposed standalone scripts (no existing code changes)
+
+Directory: scripts/rfs
+
+- common.sh
+  - Read [config/build.conf](config/build.conf), [config/kernel.config](config/kernel.config) to compute FULL_KERNEL_VERSION
+  - Read [config/rfs.conf](config/rfs.conf) and construct RFS S3 store URI
+  - Detect rfs binary from PATH or [components/rfs](components/rfs)
+  - Locate modules and firmware source trees per the above priority order
+
+- pack-modules.sh
+  - Name: modules-<FULL_KERNEL_VERSION>.fl
+  - Command: rfs pack -m dist/flists/modules-...fl -s s3://... /lib/modules/<FULL_VERSION>
+  - Then upload the .fl manifest to s3://BUCKET/PREFIX/manifests/ via aws CLI if available
+
+- pack-firmware.sh
+  - Name: firmware-<YYYYMMDD>.fl by default, overridable via FIRMWARE_TAG
+  - Source: $PROJECT_ROOT/firmware preferred, else initramfs/lib/firmware
+  - Pack with rfs and upload the .fl manifest similarly
+
+- verify-flist.sh
+  - rfs flist inspect dist/flists/NAME.fl
+  - rfs flist tree dist/flists/NAME.fl | head
+  - Optional test mount with a temporary mountpoint when requested
+
+## Future runtime units (deferred)
+
+Will be added as new zinit units once flist generation is validated:
+- Mount firmware flist read-only at /lib/firmware (overmount to hide initramfs firmware beneath)
+- Mount modules flist read-only at /lib/modules/<FULL_VERSION>
+- Run depmod -a <FULL_VERSION>
+- Run udev coldplug sequence (reload, trigger add, settle)
+
+Placement relative to current units:
+- Must occur before [udev-trigger.yaml](config/zinit/udev-trigger.yaml)
+- Should ensure [depmod.yaml](config/zinit/depmod.yaml) is sequenced after modules are available from mount
+
+## Flow summary (Mermaid)
+
+```mermaid
+flowchart TD
+  A[Build start] --> B[alpine_extract/configure/packages]
+  B --> C[components_build verify]
+  C --> D[kernel_modules
+  install modules in container
+  set KERNEL_FULL_VERSION]
+  D --> E[init_script zinit_setup]
+  E --> F[modules_setup copy]
+  F --> G[cleanup validation]
+  G --> H[initramfs_create test kernel_build]
+  H --> I[boot_tests]
+
+  subgraph RFS standalone
+    R1[Compute FULL_VERSION
+    from configs]
+    R2[Select sources:
+    modules /lib/modules/FULL_VERSION
+    firmware PROJECT_ROOT/firmware or initramfs/lib/firmware]
+    R3[Pack modules flist
+    rfs pack -s s3://...]
+    R4[Pack firmware flist
+    rfs pack -s s3://...]
+    R5[Upload .fl manifests
+    to S3 manifests/]
+    R6[Verify flists
+    inspect/tree/mount opt]
+  end
+
+  H -. post-build manual .-> R1
+  R1 --> R2 --> R3 --> R5
+  R2 --> R4 --> R5
+  R3 --> R6
+  R4 --> R6
+```
+
+## Conclusion
+
+- The existing build flow provides deterministic kernel versioning and installs modules into the container at /lib/modules/<FULL_VERSION>, which is ideal for RFS packing.
+- Firmware can be sourced from the user-provided tree or the initramfs fallback.
+- RFS flist creation and publishing can be introduced entirely as standalone scripts and configuration without modifying current code.
+- Runtime overmounting and coldplug can be added later via new zinit units once flist generation is validated.

docs/rfs-flists.md

@@ -0,0 +1,209 @@
+# RFS flist creation and runtime overmounts (design)
+
+Goal
+- Produce two flists without modifying existing build scripts:
+  - firmware-VERSION.fl
+  - modules-KERNEL_FULL_VERSION.fl
+- Store blobs in S3 via rfs store; upload .fl manifest (sqlite) separately to S3.
+- Overmount these at runtime later to enable extended hardware, then depmod + udev trigger.
+
+Scope of this change
+- Add standalone scripts under [scripts/rfs](scripts/rfs) (no changes in existing libs or stages).
+- Add a config file [config/rfs.conf](config/rfs.conf) for S3 credentials and addressing.
+- Document the flow and usage here; scripting comes next.
+
+Inputs
+- Built kernel modules present in the dev-container (from kernel build stages):
+  - Preferred: /lib/modules/KERNEL_FULL_VERSION
+- Firmware source for RFS pack:
+-   Install all Alpine linux-firmware* packages into the build container and use /lib/firmware as the source (full set).
+- Initramfs fallback (build-time):
+-   Selective firmware packages installed by [bash.alpine_install_firmware()](scripts/lib/alpine.sh:392) into initramfs/lib/firmware (kept inside the initramfs).
+- Kernel version derivation (never use uname -r in container):
+  - Combine KERNEL_VERSION from [config/build.conf](config/build.conf) and LOCALVERSION from [config/kernel.config](config/kernel.config).
+  - This matches [kernel_get_full_version()](scripts/lib/kernel.sh:14).
+
+Outputs and locations
+- Flists:
+  - [dist/flists/firmware-VERSION.fl](dist/flists/firmware-VERSION.fl)
+  - [dist/flists/modules-KERNEL_FULL_VERSION.fl](dist/flists/modules-KERNEL_FULL_VERSION.fl)
+- Blobs are uploaded by rfs to the configured S3 store.
+- Manifests (.fl sqlite) are uploaded by script as S3 objects (separate from blob store).
+
+Configuration: [config/rfs.conf](config/rfs.conf)
+Required values:
+- S3_ENDPOINT=https://s3.example.com:9000
+- S3_REGION=us-east-1
+- S3_BUCKET=zos
+- S3_PREFIX=flists/zosbuilder
+- S3_ACCESS_KEY=AKIA...
+- S3_SECRET_KEY=...
+
+Notes:
+- We construct an rfs S3 store URI for pack operations (for blob uploads during pack):
+  - s3://S3_ACCESS_KEY:S3_SECRET_KEY@HOST:PORT/S3_BUCKET/S3_PREFIX?region=S3_REGION
+- After pack, we correct the flist route URL to include READ-ONLY credentials so mounts can read directly from Garage:
+  - UPDATE route SET url='s3://READ_ACCESS_KEY:READ_SECRET_KEY@HOST:PORT/ROUTE_PATH?region=ROUTE_REGION'
+  - Defaults: ROUTE_PATH=/blobs, ROUTE_REGION=garage, ROUTE_ENDPOINT=S3_ENDPOINT (overridable)
+
+Scripts to add (standalone)
+- [scripts/rfs/common.sh](scripts/rfs/common.sh)
+  - Read [config/build.conf](config/build.conf) and [config/kernel.config](config/kernel.config).
+  - Compute FULL_KERNEL_VERSION exactly as [kernel_get_full_version()](scripts/lib/kernel.sh:14).
+  - Read and validate [config/rfs.conf](config/rfs.conf).
+  - Build S3 store URI for rfs.
+  - Locate module and firmware source trees (with priority rules).
+  - Locate rfs binary (PATH first, fallback to [components/rfs/target/x86_64-unknown-linux-musl/release/rfs](components/rfs/target/x86_64-unknown-linux-musl/release/rfs)).
+
+- [scripts/rfs/pack-modules.sh](scripts/rfs/pack-modules.sh)
+  - Name: modules-KERNEL_FULL_VERSION.fl (e.g., modules-6.12.44-Zero-OS.fl).
+  - rfs pack -m dist/flists/modules-...fl -s s3://... /lib/modules/KERNEL_FULL_VERSION
+  - Optional: upload dist/flists/modules-...fl to s3://S3_BUCKET/S3_PREFIX/manifests/ using MinIO Client (mc) if present.
+
+- [scripts/rfs/pack-firmware.sh](scripts/rfs/pack-firmware.sh)
+  - Source: $PROJECT_ROOT/firmware if exists, else initramfs/lib/firmware.
+  - Name: firmware-YYYYMMDD.fl by default; override with FIRMWARE_TAG env to firmware-FIRMWARE_TAG.fl.
+  - rfs pack as above; optional upload of the .fl manifest using MinIO Client (mc) if present.
+
+- [scripts/rfs/verify-flist.sh](scripts/rfs/verify-flist.sh)
+  - rfs flist inspect dist/flists/NAME.fl
+  - rfs flist tree dist/flists/NAME.fl | head
+  - Optional: test mount if run with --mount (mountpoint under /tmp).
+
+Runtime (deferred to a follow-up)
+- New zinit units to mount and coldplug:
+  -   Mount firmware flist read-only at /lib/firmware
+  - Mount modules flist at /lib/modules/KERNEL_FULL_VERSION
+  - Run depmod -a KERNEL_FULL_VERSION
+  - udevadm control --reload; udevadm trigger --action=add; udevadm settle
+- Placement examples (to be created later):
+  - [config/zinit/rfs-modules.yaml](config/zinit/rfs-modules.yaml)
+  - [config/zinit/rfs-firmware.yaml](config/zinit/rfs-firmware.yaml)
+  - Keep in correct dependency order before [config/zinit/udev-trigger.yaml](config/zinit/udev-trigger.yaml).
+
+Naming policy
+- modules flist:
+  - modules-KERNEL_FULL_VERSION.fl
+- firmware flist:
+  - firmware-YYYYMMDD.fl by default
+  - firmware-FIRMWARE_TAG.fl if env FIRMWARE_TAG is set
+
+Usage flow (after your normal build inside dev-container)
+1) Create config for S3: [config/rfs.conf](config/rfs.conf)
+2) Generate modules flist: [scripts/rfs/pack-modules.sh](scripts/rfs/pack-modules.sh)
+3) Generate firmware flist: [scripts/rfs/pack-firmware.sh](scripts/rfs/pack-firmware.sh)
+4) Verify manifests: [scripts/rfs/verify-flist.sh](scripts/rfs/verify-flist.sh) dist/flists/modules-...fl
+
+Assumptions
+- rfs supports s3 store URIs as described (per [components/rfs/README.md](components/rfs/README.md)).
+- The dev-container has the built kernel modules in /lib/modules/KERNEL_FULL_VERSION (as produced via [kernel_build_modules()](scripts/lib/kernel.sh:228)).
+- No changes are made to existing build scripts. The new scripts are run on-demand.
+
+Open question for confirm
+- Confirm S3 endpoint form (with or without explicit port) and whether we should prefer AWS_REGION env over query param; scripts will support both patterns.
+
+Note on route URL vs HTTP endpoint
+- rfs mount reads blobs via s3:// URLs, not via an arbitrary HTTP(S) endpoint. A reverse proxy is not required if you embed read-only S3 credentials in the flist.
+- This project now patches the flist after pack to set route.url to a read-only Garage S3 URL:
+  - Example SQL equivalent:
+    - UPDATE route SET url='s3://READ_ACCESS_KEY:READ_SECRET_KEY@[HOST]:3900/blobs?region=garage';
+- Configure these in config/rfs.conf:
+  - READ_ACCESS_KEY / READ_SECRET_KEY: read-only credentials
+  - ROUTE_ENDPOINT (defaults to S3_ENDPOINT), ROUTE_PATH=/blobs, ROUTE_REGION=garage
+- Do not set ROUTE_PATH to S3_PREFIX. ROUTE_PATH is the gateway’s blob route (usually /blobs). S3_PREFIX is only for the pack-time store path.
+
+## Runtime units and ordering (zinit)
+
+This repo now includes runtime zinit units and init scripts to mount the RFS flists and perform dual udev coldplug sequences.
+
+- Early coldplug (before RFS mounts):
+  - [config/zinit/udev-trigger.yaml](config/zinit/udev-trigger.yaml) calls [config/zinit/init/udev.sh](config/zinit/init/udev.sh).
+  - Runs after depmod/udev daemons to initialize NICs and other devices using what is already in the initramfs.
+  - Purpose: bring up networking so RFS can reach Garage S3.
+
+- RFS mounts (daemons, after network):
+  - [config/zinit/rfs-modules.yaml](config/zinit/rfs-modules.yaml) runs [config/zinit/init/modules.sh](config/zinit/init/modules.sh) to mount modules-$(uname -r).fl onto /lib/modules/$(uname -r).
+  - [config/zinit/rfs-firmware.yaml](config/zinit/rfs-firmware.yaml) runs [config/zinit/init/firmware.sh](config/zinit/init/firmware.sh) to mount firmware-latest.fl onto /usr/lib/firmware.
+  - Both are defined as restart: always and include after: network to ensure the Garage S3 route is reachable.
+
+- Post-mount coldplug (after RFS mounts):
+  - [config/zinit/udev-rfs.yaml](config/zinit/udev-rfs.yaml) performs:
+    - udevadm control --reload
+    - udevadm trigger --action=add --type=subsystems
+    - udevadm trigger --action=add --type=devices
+    - udevadm settle
+  - This re-probes hardware so new modules/firmware from the overmounted flists are considered.
+
+- Embedded manifests in initramfs:
+  - The build embeds the flists under /etc/rfs:
+    - modules-KERNEL_FULL_VERSION.fl
+    - firmware-latest.fl
+  - Creation happens in [scripts/rfs/pack-modules.sh](scripts/rfs/pack-modules.sh) and [scripts/rfs/pack-firmware.sh](scripts/rfs/pack-firmware.sh), and embedding is orchestrated by [scripts/build.sh](scripts/build.sh).
+
+## Reproducible firmware tagging
+
+- The firmware flist name can be pinned via FIRMWARE_TAG in [config/build.conf](config/build.conf).
+  - If set: firmware-FIRMWARE_TAG.fl
+  - If unset: the build uses firmware-latest.fl for embedding (standalone pack may default to date-based).
+- The build logic picks the tag with this precedence:
+  1) Environment FIRMWARE_TAG
+  2) FIRMWARE_TAG from [config/build.conf](config/build.conf)
+  3) "latest"
+- Build integration implemented in [scripts/build.sh](scripts/build.sh).
+
+Example:
+- Set FIRMWARE_TAG in config: add FIRMWARE_TAG="20250908" in [config/build.conf](config/build.conf)
+- Or export at build time: export FIRMWARE_TAG="v1"
+
+## Verifying flists
+
+Use the helper to inspect a manifest, optionally listing entries and testing a local mount (root + proper FUSE policy required):
+
+- Inspect only:
+  - scripts/rfs/verify-flist.sh -m dist/flists/modules-6.12.44-Zero-OS.fl
+- Inspect + tree:
+  - scripts/rfs/verify-flist.sh -m dist/flists/firmware-latest.fl --tree
+- Inspect + mount test to a temp dir:
+  - sudo scripts/rfs/verify-flist.sh -m dist/flists/modules-6.12.44-Zero-OS.fl --mount
+
+## Additional blob store backends (design)
+
+This extends the existing S3/HTTP approach with a RESP/DB-style backend option for rfs blob storage. It is a design-only addition; CLI and scripts will be extended in a follow-up.
+
+Scope
+- Keep S3 flow intact via [scripts/rfs/common.sh](scripts/rfs/common.sh:137), [scripts/rfs/common.sh](scripts/rfs/common.sh:385), and [scripts/rfs/common.sh](scripts/rfs/common.sh:494).
+- Introduce RESP URIs that can be encoded in config and, later, resolved by rfs or a thin uploader shim invoked by:
+  - [scripts/rfs/pack-modules.sh](scripts/rfs/pack-modules.sh:1)
+  - [scripts/rfs/pack-firmware.sh](scripts/rfs/pack-firmware.sh:1)
+
+URI schemes (draft)
+- resp://host:port/db?prefix=blobs
+- resp+tls://host:port/db?prefix=blobs&ca=/etc/ssl/certs/ca.pem
+- resp+sentinel://sentinelHost:26379/mymaster?prefix=blobs
+- Credentials may be provided via URI userinfo or config (recommended: config only).
+
+Operations (minimal set)
+- PUT blob: write content-addressed key (e.g., prefix/ab/cd/hash)
+- GET blob: fetch by exact key
+- Exists/HEAD: presence test by key
+- Optional batching: pipelined MGET for prefetch
+
+Config keys (see example additions in config/rfs.conf.example)
+- RESP_ENDPOINT (host:port), RESP_DB (integer), RESP_PREFIX (path namespace)
+- RESP_USERNAME/RESP_PASSWORD (optional), RESP_TLS=0/1 (+ RESP_CA if needed)
+- RESP_SENTINEL and RESP_MASTER for sentinel deployments
+
+Manifests and routes
+- Keep S3 store in flist stores table (fallback) while enabling route.url patching to HTTP/S3 for read-only access:
+  - Patch stores table as today via [scripts/rfs/common.sh](scripts/rfs/common.sh:385)
+  - Patch route.url as today via [scripts/rfs/common.sh](scripts/rfs/common.sh:494)
+- RESP may be used primarily for pack-time blob uploads or as an additional store the CLI can consume later.
+
+Security
+- Do not embed write credentials in manifests.
+- Read-only credentials may be embedded in route.url if required, mirroring S3 pattern.
+
+Next steps
+- Implement RESP uploader shim called from pack scripts; keep the CLI S3 flow unchanged.
+- Extend config loader in [scripts/rfs/common.sh](scripts/rfs/common.sh:82) to parse RESP_* variables.
+- Add verification routines to sanity-check connectivity before pack.