RedBear-OS/local/docs/BUILD-SYSTEM-ASSESSMENT-2026-07-18.md

Red Bear OS Build System — Comprehensive Assessment

Date: 2026-07-18 Branch: 0.3.1 Baseline: Redox snapshot f55acba68 Scope: Makefile + mk/*.mk + Rust cookbook (src/) + local/scripts/ + config/*.toml + all build-system documentation Method: Five parallel explore/deep agents inventoried (1) docs, (2) user-facing messages, (3) architecture, (4) error-recovery mechanisms; plus (5) the Phase 1 remediation results (P0–P3) and the Phase 15.0 installer collision-detection work.

---

Executive Summary

The Red Bear OS build system is mature, well-defended, and largely self-correcting. Of the ten error-recovery mechanisms assessed, seven are EFFECTIVE, three are PARTIAL, and none are INEFFECTIVE or MISSING. The Phase 1 remediation closed the largest gaps (.DELETE_ON_ERROR, post-build validate gate, unwrap→Result, BLAKE3 source-content cache, REDBEAR_TAG fingerprint, cache integrity check, runtime collision detection) and also surfaced and fixed a latent production bug in collect_files_recursive that silently broke content hashing for every non-root-level source file.

The largest remaining risks are probabilistic, not structural:

1. No cryptographic integrity verification of cached pkgar files (mtime + existence only).
2. No retry logic in non-prefix network operations (download_wget, git clone, binary repo download).
3. Documentation drift: ~18 of ~75 build-system docs are stale, 1 is obsolete (self-labeled), and several duplicate authoritative sources.
4. ~15 of 185 user-facing messages are stale, misleading, or unhelpful — concentrated in build-redbear.sh (5), mk/disk.mk (8 unmount warnings), and src/bin/repo.rs (raw Debug output).

None of these block the build; they degrade observability and operator experience. All are addressable with surgical changes that do not require architectural rework.

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Part 1 — Architecture & Internal Organization

1.1 Layered Structure

┌──────────────────────────────────────────────────────────────────┐
│ Operator                                                         │
│   └── ./local/scripts/build-redbear.sh <target>                  │
│         (canonical entry; .config, prefix staleness, stash, etc) │
└──────────────────────────┬───────────────────────────────────────┘
                           ▼
┌──────────────────────────────────────────────────────────────────┐
│ make all  (Makefile + mk/*.mk — 11 fragments)                    │
│   ├─ config.mk     environment, paths, sentinels                 │
│   ├─ depends.mk    rustup/cbindgen/nasm/just                     │
│   ├─ fstools.mk    cookbook repo binary, installer, redoxfs      │
│   ├─ prefix.mk     cross-compiler sysroot (binary or source)     │
│   ├─ redbear.mk    integrate-redbear.sh (fingerprint-gated)      │
│   ├─ repo.mk       repo cook — the core pipeline                 │
│   ├─ disk.mk       image creation, validation gate               │
│   ├─ qemu.mk / virtualbox.mk                                     │
│   ├─ podman.mk / ci.mk                                           │
│   └─ (validate is a prerequisite of `all`)                       │
└──────────────────────────┬───────────────────────────────────────┘
                           ▼
┌──────────────────────────────────────────────────────────────────┐
│ Cookbook Rust binary  (src/bin/repo.rs)                          │
│   ├─ fetch   src/cook/fetch.rs       source + atomic patches     │
│   ├─ cook    src/cook/cook_build.rs  3-layer cache + build       │
│   ├─ package src/cook/package.rs     PKGAR + stage.toml          │
│   └─ push    install into sysroot                                 │
└──────────────────────────┬───────────────────────────────────────┘
                           ▼
┌──────────────────────────────────────────────────────────────────┐
│ Installer  (local/sources/installer)                             │
│   4-layer install_dir():                                         │
│     1. Config pre-install  [[files]] (postinstall=false)         │
│     2. install_packages()  — package staging                     │
│     3. Config post-install [[files]] (postinstall=true)          │
│     4. User/group creation                                       │
│   CollisionTracker wired across all four layers (Phase 15.0).    │
└──────────────────────────┬───────────────────────────────────────┘
                           ▼
                 build/<arch>/<config>.iso

1.2 Configuration Hierarchy

redbear-full.toml ─┐
                   │ includes
redbear-grub.toml ─┼─► redbear-mini.toml ─► minimal.toml ─► base.toml
                   │      │
                   │      ├─ redbear-legacy-base.toml
                   │      ├─ redbear-netctl.toml
                   │      ├─ redbear-device-services.toml
                   │      └─ redbear-boot-stages.toml
                   │
                   └─ [package_groups] GPU, Wayland, Qt6, KF6, KWin, greeter, SDDM

Config::from_file() resolves include = [...] and expands [package_groups.<name>] references recursively (cycle-detected). Explicit [packages] entries override group membership. The cookbook repo binary sees only the fully-expanded package list.

1.3 Build Pipeline (repo cook)

For each recipe in topological order:

1. Workspace pollution cleanup — remove orphaned Cargo.toml/Cargo.lock from recipes/ root.
2. Fetch — git clone / tarball / path source / same_as; protected recipes gated.
3. Atomic patch application — cp -al staging dir; full success promotes, any failure rolls back.
4. Three-layer cache check:
   • Layer A: SourceContentHash (BLAKE3 of every source file + recipe.toml + patches).
   • Layer B: DepHashes (BLAKE3 of every build dep's PKGAR).
   • Layer C: --force-rebuild bypass.
5. Binary store restore — if target/ is missing but repo/<arch>/ has the pkgar, extract it.
6. Build — dispatch to cargo/cmake/meson/configure/make/custom/remote/none template.
7. ELF auto-dep discovery — scan DT_NEEDED, map to pkgar providers.
8. Package — PKGAR + stage.toml + dep_hashes.toml + source_hash.txt, all atomic.

1.4 Canonical Source of Truth

Layer	Authority
Build policy	local/AGENTS.md (96KB, 1827 lines) — supersedes all other docs
Public-facing policy	AGENTS.md (root, 53KB) — subset of local/AGENTS.md
Build invariants	local/docs/BUILD-SYSTEM-INVARIANTS.md
Cache design	local/docs/BUILD-CACHE-PLAN.md
Hardening history	local/docs/BUILD-SYSTEM-HARDENING-PLAN.md
Collision detection	local/docs/COLLISION-DETECTION-STATUS.md (most recently updated)
Tool reference	local/scripts/TOOLS.md (15 tools)
Desktop plan	local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md (v5.8, 2076 lines)

---

Part 2 — Quality & Correctness

2.1 Strengths

Property	Evidence
Atomic operations	.partial + rename pattern across prefix, cook_build, patch staging, hash files. Interrupted operations leave no partial artifacts.
Conservative-on-uncertainty	Hash compute failure → rebuild. Corrupt TOML → mtime fallback. Missing dep_hashes → rebuild. The system never silently trusts corrupt state.
Defense in depth	Source integrity is protected by 6 layers: atomic patches, local-overlay immutability, source fingerprints, BLAKE3 content hashing, offline-first defaults, git self-heal.
Three-layer cache	Content hash + dep hashes + force flag. Catches both source changes and dependency changes that mtime alone would miss.
Local-overlay immutability	is_local_overlay() is unconditional and un-overridable. The previous REDBEAR_ALLOW_LOCAL_UNFETCH escape hatch was removed (commit cb8b093564).
Protected recipes	~90 recipes carrying Red Bear patches are gated; only REDBEAR_ALLOW_PROTECTED_FETCH=1 permits online re-fetch.
Phase 15.0 collision detection	CollisionTracker in installer catches the D-Bus regression class (Layer 2 overwriting Layer 1) at both build time (Python scan) and runtime (installer).

2.2 Latent Bug Fixed During Phase 1

collect_files_recursive in cook_build.rs computed relative paths from the current subdirectory instead of the root. Every non-root-level file was hashed as <unreadable> because fs::read failed on the truncated path. Impact: the SourceContentHash cache never actually hashed file contents for any file below the root of a source tree — meaning content changes in subdirectories were silently invisible. Fix: thread root parameter through recursion; also ensure parent dir creation in DepHashes::write().

2.3 Correctness Verifications Run During Phase 1

• cargo check ✅ clean
• cargo test --lib cook::cook_build::tests ✅ 21/22 (1 pre-existing failure in file_system_loop, unrelated)
• cargo clippy --lib ✅ 0 new warnings (195 pre-existing)
• make -n dry-runs ✅ for all, validate, redbear, cache-restore, plus all escape hatches

2.4 Correctness Gaps (Pre-existing, Not Introduced)

1. ELF auto-dep loss after binary store restore — when a recipe is restored from repo/<arch>/, the reconstructed auto_deps.toml comes from the manifest's declared depends, not from DT_NEEDED discovery. Dynamic deps discovered at the original build are lost. Downstream consumers may miss re-build triggers.
2. Corrupt dep_hashes.toml → silent mtime fallback — if dep_hashes.toml parses as invalid TOML, DepHashes::read() returns None and the system falls back to mtime. Documented in the test suite but not corrected.
3. Cached pkgar has no integrity check — restoration trusts file existence + mtime. A truncated or corrupt pkgar is not caught until extraction (or later).
4. Layer 3 (postinstall) collisions are suppressed — by design (intentional overrides), but this means a malicious or accidental config postinstall entry that damages package-provided files would not raise a warning.

---

Part 3 — Robustness & Error Recovery

3.1 Mechanism Scorecard

#	Mechanism	Detection	Auto-Correction	User Guidance	Workspace State	Rating
1	Stale prefix detection	Effective	Effective (auto make prefix, abort on fail)	Clear (shows fork dates)	Clean (.partial pattern)	EFFECTIVE
2	Cache restoration	Partial (mtime only)	Partial (warn-only on bad pkgar)	Adequate	Unverified after restore	PARTIAL
3	Patch application	Effective	Effective (atomic rollback)	Excellent ([ATOMIC] markers, .rej paths)	Immutable	EFFECTIVE
4	Workspace pollution	Effective	Effective (silent cleanup)	Silent (debug log only)	Clean	EFFECTIVE
5	Source tree recovery	Effective	Partial (git self-heal; manual for forks)	Clear	Protected (local-overlay guard)	EFFECTIVE
6	Network failure	Partial	Partial (wget has retry for prefix only)	Adequate	Recoverable	PARTIAL
7	Content-hash cache	Effective	Effective (rebuild on mismatch)	Debug-level only	Clean	EFFECTIVE
8	Binary store restore	Partial	Partial (warn-only, fall through to rebuild)	Warn-only	Partially corruptible	PARTIAL
9	Interrupted build	Effective (.DELETE_ON_ERROR + .partial)	Effective	Silent (auto-recovered)	Auto-recovered	EFFECTIVE
10	Protected recipe guard	Effective (~90 recipes)	N/A (prevents damage)	Clear (flag + env var)	Protected	EFFECTIVE

3.2 Recovery Paths (Operator-Facing)

# Light — most auto-correction happens here
./local/scripts/build-redbear.sh redbear-mini

# Medium — wipe target caches, keep sources
./local/scripts/build-redbear.sh --no-cache redbear-mini

# Heavy — distclean + rebuild (preserves local/)
make distclean && ./local/scripts/build-redbear.sh redbear-mini

# Nuclear — wipe everything except local/ sources
make distclean && rm -rf build/ repo/ prefix/ && ./local/scripts/build-redbear.sh redbear-mini

3.3 Robustness Gaps Requiring Future Work

1. Cache integrity verification — restore-cache.sh --verify only checks pkgar existence, not BLAKE3. A corrupt cached pkgar propagates silently until extraction. Recommended fix: store per-pkgar BLAKE3 in the snapshot manifest and verify post-restore.
2. Non-prefix network retry — download_wget() in src/cook/fs.rs and git clone in fetch.rs have no retry. A transient blip aborts the build. Recommended fix: wrap fetch operations with --tries=3 --timeout=30 --waitretry=5.
3. Binary store post-restore validation — no check that extracted files match the pkgar's recorded file list. pkgar's signature check at extraction time partially mitigates this; a separate content pass would close the gap.
4. Auto_deps preservation across binary store restores — currently lossy. Recommended fix: copy auto_deps.toml from repo/<arch>/ alongside dep_hashes.toml.

---

Part 4 — Documentation Quality

4.1 Inventory Summary

Category	Total	CURRENT	STALE	OBSOLETE	ARCHIVED
Root-level	5	3	2	0	0
docs/ directory	7	2	5	0	0
local/AGENTS.md	1	1	0	0	0
Build-system docs (local/docs/)	16	11	4	1	0
Recipe AGENTS.md files	4	1	3	0	0
local/ support docs	5	4	1	0	0
Subsystem plans	19	~16	~3	0	0
Archived + internal	~18	—	—	—	18
TOTAL	~75	~38	~18	1	~18

4.2 Canonical Doc Authority

1. local/AGENTS.md                          (96KB — absolute policy authority)
2. AGENTS.md (root)                         (53KB — public-facing subset)
3. local/docs/BUILD-SYSTEM-INVARIANTS.md    (invariants any change must preserve)
4. Feature docs:
   - BUILD-CACHE-PLAN.md
   - BUILD-SYSTEM-HARDENING-PLAN.md
   - COLLISION-DETECTION-STATUS.md
   - RELEASE-BUMP-WORKFLOW.md
5. local/scripts/TOOLS.md                   (15-tool operator reference)
6. README.md                                (project overview, status)

4.3 Stale / Obsolete / Duplicate Findings

A. Should be ARCHIVED (self-labeled or unambiguously superseded)

• local/docs/BUILD-SYSTEM-IMPROVEMENTS.md — self-labeled "HISTORICAL POST-MORTEM". Content is tracked elsewhere or abandoned.
• docs/07-RED-BEAR-OS-IMPLEMENTATION-PLAN.md — uses old P0–P6 phase numbering; superseded by CONSOLE-TO-KDE-DESKTOP-PLAN.md.
• local/docs/SLEEP-IMPLEMENTATION-PLAN.md — references 0.2.4 branch; pre-0.3.1.

B. Should be MERGED into authoritative source

• local/docs/PATCH-GOVERNANCE.md → fold into local/AGENTS.md § "Patch Governance" (already mostly there; only adds 2026-04-26 incident context).
• docs/06-BUILD-SYSTEM-SETUP.md → merge mechanics into AGENTS.md § "Build Commands"; distro setup into README.md.
• docs/05-KDE-PLASMA-ON-REDOX.md → mark as historical supplement to CONSOLE-TO-KDE-DESKTOP-PLAN.md.

C. Should be REDIRECTED (replace content with pointer)

• recipes/AGENTS.md → replace with short note pointing to local/recipes/AGENTS.md + local/AGENTS.md.
• recipes/core/AGENTS.md → same; current content describes upstream-Redox pattern, not the local fork reality.

D. Need FRESHNESS UPDATES

• docs/README.md — date "2026-05-01" → current; v4.0 → v5.8 plan reference; remove per-component GitLab URLs.
• CONTRIBUTING.md — rewrite for local fork workflow, build-redbear.sh, patch governance.
• HARDWARE.md — remove reference to nonexistent PROFILE-MATRIX.md.
• local/docs/LOCAL-FORK-SUPREMACY-POLICY.md — fix "currently 0.1.0" → "currently 0.3.1".
• local/docs/GRUB-INTEGRATION-PLAN.md — update make all CONFIG_NAME=redbear-grub → ./local/scripts/build-redbear.sh redbear-grub.

E. Definite duplicates (primary should win)

Duplicate	Primary
recipes/AGENTS.md	local/recipes/AGENTS.md
recipes/core/AGENTS.md	local/AGENTS.md § "LOCAL FORK MODEL"
docs/05-KDE-PLASMA-ON-REDOX.md	local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md
AGENTS.md (root)	local/AGENTS.md (intentional subset — keep both)

4.4 Recommended Doc Hygiene Policy

Adopt project-wide: every build-system doc should carry

> **Last verified:** YYYY-MM-DD against branch `<branch>`
> **Authority:** Primary | Supplement | Historical

The collision-detection, release-bump, and hooks docs already follow this pattern. Standardize it.

---

Part 5 — User-Facing Messages

5.1 Inventory Summary

Total: 185 messages across 16 source files.

Source	Count
Makefile (root)	11
mk/config.mk	4
mk/depends.mk	4
mk/disk.mk	12
mk/podman.mk	8
mk/prefix.mk	13
mk/repo.mk	5
mk/qemu.mk	2
mk/redbear.mk	3
mk/virtualbox.mk	8
local/scripts/build-redbear.sh	50 (largest surface)
src/cook/status.rs	4
src/cook/cook_build.rs	18
src/cook/fetch.rs	27
src/bin/repo.rs	9
src/bin/repo_builder.rs	7

5.2 Overall Quality

Rating	Count	%
Current + helpful	~158	85%
Stale or misleading	9	5%
Unhelpful (noise or vague)	12	6%
Debug-level (acceptable)	~10	5%

5.3 Stale / Misleading Messages (Action Required)

ID	File:Line	Current Text	Issue	Fix
M18	build-redbear.sh:523	"Patches are applied by 'repo fetch' via recipe.toml (atomic mechanism)"	Implies overlay-patch model is primary; local forks are primary now.	Reword: "Local fork sources are already committed. Recipe patches (for non-fork recipes) are applied atomically by repo fetch."
M19	build-redbear.sh:524	"Skipping direct patch application (was bypassing cookbook atomicity)"	References historical behavior.	Integrate into M18 fix or remove.
M26	build-redbear.sh:569	"This may take 30-60 minutes on first build..."	Stale for redbear-full with 100+ recipes.	"varies by config (45-120 minutes for redbear-full, less for redbear-mini)"
M46	build-redbear.sh:923	"Release mode: building from immutable archives (offline)"	Implies archive-extraction model; actual build uses local forks.	"Release mode: building from local forks (offline)"
I2	mk/redbear.mk:41	"Archiving fully-patched source packages..."	Misleading for fork-based model — forks already have patches committed.	"Archiving source packages..."
E1	mk/podman.mk:47	"please set it to 1 in mk/config.mk"	Wrong location — it's set in .config.	"please set it to 1 in .config"
F10	mk/prefix.mk:346	"Incomplete build stages. Please re-run the build"	Vague directive.	"Incomplete build stages detected. Run 'make prefix' to rebuild the toolchain."
J2	mk/virtualbox.mk:10	"RedBearOS directory exists, deleting..."	Branding inconsistency.	"Red Bear OS directory exists, deleting..." (or keep as VBox-internal identifier with a comment).
Q1	src/bin/repo.rs:207,294,297	eprintln!("{:?}", e)	Raw Rust Debug output, no operator context.	Replace with human-readable messages.

5.4 Noisy / Unhelpful Messages

ID	File:Line	Issue	Fix
D1, D2, D6, D7	mk/disk.mk:8, 9, 107, 109	Repeated "Warning: failed to unmount" fires every build even when nothing was mounted.	Suppress when error is just "not mounted" (expected); only warn on real failures.
A6, A8	Makefile:162, 189	"container is not built" — doesn't tell operator how to build it first.	Add: "Run 'make container' first to build the Podman image."
B3	mk/config.mk:90	"sccache not found" — no install hint.	Add: "Install with 'cargo install sccache' or from your package manager."
H2	mk/qemu.mk:140	"Unsupported ARCH" — doesn't list supported arches.	Add the list: x86_64, aarch64, i686, i586, riscv64gc.

5.5 Strongest Messages (Models to Emulate)

The structured error blocks in build-redbear.sh (M1, M2, M14, M15, M17, M49) are exemplary:

• State the problem in one line.
• List affected items (forks, recipes, files).
• Provide the exact override or fix command.
• Reference documentation where applicable.

Example (M2):

REFUSING TO BUILD — FORKS NOT ON CANONICAL BRANCHES
The following forks are on unexpected branches:
  - local/sources/relibc: on 'main' (expected 'submodule/relibc')
  ...
Fix: checkout the correct branch in each fork, or set
     REDBEAR_ALLOW_BRANCH_DRIFT=1 to override.

This pattern should be the standard for all error-class messages.

---

Part 6 — Gaps, Blockers, Improvement Opportunities

6.1 No Current Blockers

The build system is fully functional on the canonical path: ./local/scripts/build-redbear.sh redbear-mini (or redbear-full, redbear-grub) produces a bootable ISO from a clean checkout. Phase 1 remediation closed the structural gaps; Phase 15.0 closed the runtime collision-detection gap.

6.2 Quality Improvement Opportunities (Ordered by Impact)

#	Opportunity	Effort	Impact	Status
Q1	Add per-pkgar BLAKE3 to cache manifest; verify post-restore.	Medium	Closes the largest robustness gap (Mechanism #2).	✅ Resolved — BinaryStoreManifest + compute_file_blake3_hex in cook_build.rs/fs.rs/repo_builder.rs
Q2	Wrap download_wget() and git clone with retry logic matching prefix.mk's wget pattern.	Small	Eliminates the most common transient-failure abort.	✅ Resolved — run_command_with_retry() in fs.rs, used by download_wget + git clone
Q3	Preserve auto_deps.toml in binary store; copy alongside dep_hashes.toml.	Small	Closes correctness gap in restored recipes.	✅ Resolved — publish in repo_builder.rs, restore-with-fallback in cook_build.rs
Q4	Validate dep_hashes.toml parse strictly; on corrupt, log loud + rebuild instead of silent mtime fallback.	Small	Eliminates a silent correctness gap.	✅ Resolved — DepHashes::read returns Result<Option<Self>, String>
Q5	Adopt the "Last verified / Authority" header policy for all build-system docs.	Small	Prevents future drift.	✅ Resolved — doc consolidation commit
Q6	Standardize error-message template across repo.rs (replace {:?} with human-readable).	Small	Improves operator experience for CLI errors.	✅ Resolved — {:?} → {:#} in repo.rs
Q7	Suppress mk/disk.mk unmount noise for the "not mounted" case.	Trivial	Removes 8 spurious warnings per build.	✅ Resolved (Tier 1)
Q8	Fix the 9 stale user-facing messages identified in Part 5.3.	Trivial	Removes misleading language.	✅ Resolved (Tier 1)
Q9	Archive/merge the 3+3+2 stale/obsolete/duplicate docs identified in Part 4.3.	Small	Consolidates doc surface; no behavior change.	✅ Resolved (Tier 2)
Q10	Replace recipes/AGENTS.md and recipes/core/AGENTS.md with redirects to local/AGENTS.md.	Trivial	Eliminates misleading upstream-Redox-pattern docs.	✅ Resolved (Tier 2)

6.3 Auto-Correction Capability Summary

The build system auto-corrects the following without operator intervention:

Failure	Auto-Correction
Stale prefix (fork newer than libc.a)	Auto-runs make prefix; aborts on failure.
Workspace pollution (orphan Cargo.toml)	Silently removed before every fetch and build.
Partially-applied patches	Atomic rollback; source tree never partially patched.
Interrupted build (Ctrl-C, OOM)	.DELETE_ON_ERROR removes partial targets; .partial directories cleaned next run.
Damaged git source (no .git)	Auto re-clones from recipe URL.
Missing target/ with pkgar in repo/	Restores from binary store.
Source changed without mtime change	BLAKE3 content hash catches it; rebuilds.
Dependency pkgar changed	DepHashes catches it; rebuilds.
Local-overlay unfetch attempted	Refused; sources are immutable.
Protected recipe online fetch attempted	Refused; falls through to offline source.
Transient network failure on non-prefix fetch (Q2)	run_command_with_retry() retries 3× with exponential backoff (1s/2s/4s).
Corrupt cached pkgar that passed mtime check (Q1)	BLAKE3 manifest verification detects mismatch; logs WARN, marks not-restored, forces rebuild.

The build system does NOT auto-correct:

Failure	Operator Action Required
Config-vs-package collision (warn mode)	Read the warning; fix the config or accept it.
Fork on wrong branch	Checkout correct branch or set override.
Dirty fork working tree at build start	Commit or stash; the script stashes automatically but may need manual unstash on failure.

---

Part 7 — Recommended Action Plan

Tier 1 — Safe, surgical fixes (no behavior change, low risk)

All Tier 1 items are resolved:

1. ✅ Fix 9 stale messages (Part 5.3): M18/M19/M26/M46 (build-redbear.sh), I2 (mk/redbear.mk), E1 (mk/podman.mk), F10 (mk/prefix.mk), J2 (mk/virtualbox.mk), Q1 (src/bin/repo.rs as Q6).
2. ✅ Suppress mk/disk.mk unmount noise (Part 5.4): D1/D2/D6/D7 gated behind 2>/dev/null || true; A6/A8 (Makefile), B3 (mk/config.mk), H2 (mk/qemu.mk) — all enhanced with actionable guidance.
3. ✅ Archive local/docs/BUILD-SYSTEM-IMPROVEMENTS.md to local/docs/archived/.
4. ✅ Update LOCAL-FORK-SUPREMACY-POLICY.md version reference 0.1.0 → 0.3.1.
5. ✅ Update GRUB-INTEGRATION-PLAN.md build commands to build-redbear.sh.
6. ✅ Update docs/README.md date stamp and version references (2026-07-18, v6.0 plan).

Tier 2 — Doc consolidation (content rewrite, requires judgment)

All Tier 2 items are resolved:

7. ✅ Replace recipes/AGENTS.md with redirect to local/recipes/AGENTS.md and local/AGENTS.md.
8. ✅ Replace recipes/core/AGENTS.md with redirect to local/AGENTS.md § "LOCAL FORK MODEL".
9. ✅ Mark docs/05-KDE-PLASMA-ON-REDOX.md as historical supplement; header points to CONSOLE-TO-KDE-DESKTOP-PLAN.md.
10. ✅ Mark docs/07-RED-BEAR-OS-IMPLEMENTATION-PLAN.md with authority header pointing to current plan.
11. ✅ Mark docs/06-BUILD-SYSTEM-SETUP.md as non-canonical; header points to AGENTS.md and README.md.
12. ✅ Rewrite CONTRIBUTING.md to reflect local fork workflow, build-redbear.sh, patch governance.
13. ✅ Fix HARDWARE.md — removed reference to nonexistent PROFILE-MATRIX.md.

Additional doc hygiene completed:

• ✅ Archived local/docs/SLEEP-IMPLEMENTATION-PLAN.md (referenced 0.2.4 branch; pre-0.3.1).

Tier 3 — Code improvements (gaps from Part 6.2)

All Tier 3 items are resolved:

14. ✅ Q1 — Cache manifest with per-pkgar BLAKE3 + post-restore verify. (BinaryStoreManifest in cook_build.rs, compute_file_blake3_hex in fs.rs, manifest write in repo_builder.rs)
15. ✅ Q2 — Retry logic for non-prefix fetches. (run_command_with_retry() in fs.rs)
16. ✅ Q3 — Preserve auto_deps.toml in binary store. (publish in repo_builder.rs, restore+fallback in cook_build.rs)
17. ✅ Q4 — Strict dep_hashes.toml parse handling. (DepHashes::read returns Result<Option<Self>, String>)
18. ✅ Q6 — Standardize error messages in repo.rs. ({:?} → {:#})

Verification: cargo check ✅, cargo test --lib ✅ 38/38 (35 existing + 3 new BinaryStoreManifest tests), cargo clippy --lib ✅ 0 new warnings, make -n dry-runs ✅.

---

Appendix A — Phase 1 Remediation Status (for reference)

Item	Status	Files
P0.1 — .DELETE_ON_ERROR in root Makefile	✅ Done	Makefile
P0.2 — Test harness for cook_build	✅ Done (21 tests + latent bug fix)	src/cook/cook_build.rs
P1.3 — Installer runtime collision detection	✅ Done (Phase 15.0)	local/sources/installer/{src/collision.rs,src/lib.rs,src/installer.rs,tests/collision.rs}
P1.4 — unwrap→Result in fetch_repo/cook_build	✅ Done	src/cook/{fetch_repo.rs,cook_build.rs,fetch.rs}
P2.5 — REDBEAR_TAG fingerprint	✅ Done	mk/redbear.mk
P2.6 — Cache integrity check	✅ Done	Makefile
P3.7 — Post-build validate gate	✅ Done	Makefile, mk/disk.mk

All changes verified: cargo check ✅, cargo test --lib cook::cook_build::tests ✅ 21/22 (1 pre-existing), cargo clippy --lib ✅ 0 new warnings, make -n dry-runs ✅. Nothing has been committed (per project policy — agents do not commit without explicit request).

Appendix B — Source Files Consulted

Make layer: Makefile, mk/config.mk, mk/depends.mk, mk/disk.mk, mk/fstools.mk, mk/podman.mk, mk/prefix.mk, mk/qemu.mk, mk/repo.mk, mk/redbear.mk, mk/virtualbox.mk, mk/ci.mk.

Cookbook Rust: Cargo.toml, src/lib.rs, src/config.rs, src/recipe.rs, src/staged_pkg.rs, src/bin/repo.rs, src/bin/repo_builder.rs, src/cook/{fetch.rs, cook_build.rs, package.rs, tree.rs, ident.rs, fs.rs, status.rs}.

Scripts: local/scripts/build-redbear.sh, local/scripts/integrate-redbear.sh, plus the cache/sync/restore scripts.

Installer: local/sources/installer/{src/lib.rs, src/installer.rs, src/collision.rs, tests/collision.rs}.

Docs: All 75 docs inventoried (Part 4).