diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+# Changelog for gachi-sync
+
+## 0.1.0.1 — 2026-11-03
+
+- Strict Hackage metadata hardening: added category, description, and PVP upper bounds across all build dependencies.
+
+## 0.1.0.0 — Initial Release
+
+- Cross-repository standardization matrix and configuration synchronization.
+- 9-dimensional ecosystem matrix audit engine.
+- Canonical asset catalog propagation across ecosystem repositories.
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,189 @@
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diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,66 @@
+# gachi-sync — Cross-Repository Standardization Matrix & Harmonic Configuration Synchronization
+
+[![License: EUPL-1.2](https://img.shields.io/badge/License-EUPL--1.2-blue.svg)](LICENSE)
+[![GHC: 9.14.1](https://img.shields.io/badge/GHC-9.14.1-purple.svg)](cabal.project)
+[![Verification: 5 Gates](https://img.shields.io/badge/Verification-5%20Gates%20Passed-brightgreen.svg)](bin/gachi-verify)
+
+`gachi-sync` is the core standardization and propagation engine of the Gachi ecosystem framework. It establishes the canonical 9-dimensional Standardization Matrix (`~/src/PLAN.md` §1.A), canonical asset catalog, repository audit engine, and differential configuration propagation mechanisms (`gachi sync`).
+
+---
+
+## The 9 Standardization Dimensions
+
+In accordance with Note [Ecosystem Standardization Invariants] ([`ref:note-ecosystem-standardization`](../../docs/notes/GACHI_DESIGN.md#3-grounded-notes-architecture)) and Note [Cross-Repository Standardization Matrix and Audit Semantics] ([`ref:note-standardization-matrix`](src/Gachi/Sync/Matrix.hs)), every repository in the ecosystem conforms to nine non-negotiable dimensions:
+
+| Dimension | Description | Canonical Assets |
+|---|---|---|
+| **1. Layout** | Workspace hierarchy & documentation | `packages/*/`, `docs/INDEX.md`, `PLAN.md`, `STATE.md` |
+| **2. Formatters** | Declarative style profiles | `fourmolu.yaml`, `rustfmt.toml`, `.clang-format` |
+| **3. Linters** | Zero-hint static analysis rules | `.hlint.yaml` |
+| **4. Build System** | Pinning GHC 9.14 / Cabal 3.18 | `cabal.project`, `cabal.project.local.example` |
+| **5. Git Governance** | RFC 2822 trailer & pre-commit hooks | `.gitmessage`, `.githooks/commit-msg`, `.githooks/pre-commit` |
+| **6. Remote Topology** | Multi-forge replication remotes | `rad` (Radicle p2p), `github`, `gitcode`, `framagit`, `disroot` |
+| **7. Tiered CI** | Asymmetric resource allocation | `.github/workflows/ci.yml`, `.gitlab-ci.yml` |
+| **8. Polyglot** | Multi-language FFI & boundaries | FFI ABI stability, polyglot test runners |
+| **9. Agent Context** | AI pair programming & token budget | `AGENTS.md` (~4 KB), `CLAUDE.md`, `.agents/rules/` |
+
+---
+
+## Architectural Principles
+
+1. **Non-Destructive Safety:**
+   Audit operations are strictly read-only and pure. Synchronization operations inspect differential changes and report discrepancies before mutating files.
+2. **Deterministic Catalog:**
+   All shared configurations derive from pure Haskell generators with zero ambient filesystem or network side-effects.
+3. **Five-Gate Readiness:**
+   Any repository conforming to the standardization matrix immediately satisfies all five physical verification gates (`./bin/<project>-verify`).
+
+---
+
+## Module Overview
+
+- **[`Gachi.Sync.Types`](src/Gachi/Sync/Types.hs):** Structural data types for asset categories, standard assets, standardization matrices, audit statuses, and diagnostic reports.
+- **[`Gachi.Sync.Matrix`](src/Gachi/Sync/Matrix.hs):** Canonical 9-dimensional Standardization Matrix definition and category lookup.
+- **[`Gachi.Sync.Catalog`](src/Gachi/Sync/Catalog.hs):** Pure content generators for shared formatters, linters, Git hooks, CI workflows, and agent rules.
+- **[`Gachi.Sync.Audit`](src/Gachi/Sync/Audit.hs):** Non-destructive audit engine inspecting physical workspaces against matrix contracts and formatting diagnostic reports.
+- **[`Gachi.Sync.CI`](src/Gachi/Sync/CI.hs):** Forge-tiered CI matrix synthesizer and asymmetric runner allocation engine.
+- **[`Gachi.Sync.Hash`](src/Gachi/Sync/Hash.hs):** Pure FIPS 180-2 SHA-256 differential cryptographic hashing engine.
+- **[`Gachi.Sync.Engine`](src/Gachi/Sync/Engine.hs):** Harmonic chattering synchronization engine enforcing mathematical idempotency \(f(f(x)) = f(x)\).
+- **[`Gachi.Sync`](src/Gachi/Sync.hs):** Root umbrella module re-exporting the complete synchronization API.
+
+---
+
+## Quick Example
+
+```haskell
+import Gachi.Schema.Project (defaultProject, Author(..))
+import Gachi.Sync
+
+-- Audit a target repository against the canonical matrix
+main :: IO ()
+main = do
+  let auth = Author "Nadia Yvette Chambers" "nadia.yvette.chambers@ik.me"
+      proj = defaultProject "gongju" auth
+  report <- auditRepository "/home/nyc/src/gongju" proj canonicalMatrix
+  putStrLn (formatAuditReport report)
+```
diff --git a/gachi-sync.cabal b/gachi-sync.cabal
--- a/gachi-sync.cabal
+++ b/gachi-sync.cabal
@@ -1,21 +1,32 @@
 cabal-version: 3.0
 name: gachi-sync
-version: 0.1.0.0
-synopsis: Cross-repository standardization matrix and configuration synchronization for Gachi
+version: 0.1.0.1
+synopsis: Cross-repo standardization matrix and configuration sync for Gachi
 description:
-  Implements the 9-dimensional ecosystem standardization matrix (~/src/PLAN.md §1.A),
-  canonical shared asset catalog, repository audit engine, and harmonic configuration
-  propagation across ecosystem checkouts ('gachi sync').
+  Implements the 9-dimensional ecosystem standardization matrix,
+  canonical shared asset catalog, repository audit engine, and harmonic
+  configuration propagation across ecosystem checkouts ('gachi sync').
 license: EUPL-1.2
+license-file: LICENSE
 author: Nadia Yvette Chambers
 maintainer: nadia.yvette.chambers@ik.me
-category: Development, Tools
+category: Development
+homepage: https://github.com/NadiaYvette/gachi
+bug-reports: https://github.com/NadiaYvette/gachi/issues
+extra-doc-files:
+  README.md
+  CHANGELOG.md
 build-type: Simple
 tested-with:
   GHC == 9.10.3,
   GHC == 9.12.4,
   GHC == 9.14.1
 
+source-repository head
+  type: git
+  location: https://github.com/NadiaYvette/gachi
+  subdir: packages/gachi-sync
+
 library
   exposed-modules:
     Gachi.Sync
@@ -40,15 +51,15 @@
     -Wredundant-constraints
   build-depends:
     base >= 4.14 && < 5,
-    bytestring >= 0.10,
-    text >= 2.0,
-    containers >= 0.6,
-    directory >= 1.3,
-    filepath >= 1.4,
-    process >= 1.6,
-    gachi-core >= 0.1,
-    gachi-schema >= 0.1,
-    gachi-scaffold >= 0.1
+    bytestring >= 0.10 && < 0.13,
+    text >= 2.0 && < 2.2,
+    containers >= 0.6 && < 0.9,
+    directory >= 1.3 && < 1.4,
+    filepath >= 1.4 && < 1.6,
+    process >= 1.6 && < 1.7,
+    gachi-core >= 0.1 && < 0.2,
+    gachi-schema >= 0.1 && < 0.2,
+    gachi-scaffold >= 0.1 && < 0.2
 
 test-suite tests
   type: exitcode-stdio-1.0
@@ -67,14 +78,14 @@
   build-depends:
     base >= 4.14 && < 5,
     gachi-sync,
-    gachi-core,
-    gachi-schema,
-    gachi-scaffold,
-    bytestring >= 0.10,
-    text >= 2.0,
-    containers >= 0.6,
-    directory >= 1.3,
-    filepath >= 1.4,
-    process >= 1.6,
-    time >= 1.9,
-    hspec >= 2.10
+    gachi-core >= 0.1 && < 0.2,
+    gachi-schema >= 0.1 && < 0.2,
+    gachi-scaffold >= 0.1 && < 0.2,
+    bytestring >= 0.10 && < 0.13,
+    text >= 2.0 && < 2.2,
+    containers >= 0.6 && < 0.9,
+    directory >= 1.3 && < 1.4,
+    filepath >= 1.4 && < 1.6,
+    process >= 1.6 && < 1.7,
+    time >= 1.9 && < 1.16,
+    hspec >= 2.10 && < 2.12
