docs: link Prolly repository references

API.md

@@ -8,6 +8,10 @@ Goal: choose the right client method, understand the snapshot and consistency ru
 
 The client adapter uses the AWS SDK for Rust. The same adapter talks to Amazon S3 and compatible services that pass SILO’s provider qualification probes. The repository format, upgrade rules, cache contract, and production support posture are defined in [`GA-CONTRACT.md`](GA-CONTRACT.md).
 
+SILO uses [Prolly trees](https://github.com/crabbuild/prolly) for
+content-addressed metadata and history. This guide focuses on the S3-backed
+repository API around those trees.
+
 ## Choose an API by task
 
 Use this table to find the shortest path to a common operation:

CACHE-AND-SCALE-DESIGN.md

@@ -45,7 +45,8 @@ branch ref
   → immutable payload
 ```
 
-The journal-derived index is a Prolly tree of content ID to node-pack range.
+The journal-derived index is a [Prolly tree](https://github.com/crabbuild/prolly)
+of content ID to node-pack range.
 Its small mutable head advances behind the publication journal. Normal point
 lookups never list the repository namespace.
 

CHANGELOG.md

@@ -4,7 +4,8 @@ All notable SILO changes will be recorded here.
 
 ## Unreleased
 
-- Extracted the immutable S3 version-control ledger from the Prolly monorepo.
+- Extracted the immutable S3 version-control ledger from the [Prolly
+  monorepo](https://github.com/crabbuild/prolly).
 - Added standalone SILO workspace metadata, open-source CI, RustFS
   qualification, security policy, and release scaffolding.
 - Preserved the `prolly-s3` durable protocol namespace for existing buckets.

CONTRIBUTING.md

@@ -1,7 +1,8 @@
 # Contributing to SILO
 
 SILO is an open-source CrabBuild repository. Contributions are reviewed
-through pull requests and must preserve the durable repository contract.
+through pull requests and must preserve the durable repository contract. SILO
+was extracted from the [Prolly repository](https://github.com/crabbuild/prolly).
 
 ## Before opening a pull request
 

README.md

@@ -6,6 +6,10 @@ branches, tags, listings, diffs, merges, recovery checkpoints, and garbage
 collection while keeping user file bodies as complete immutable provider
 objects.
 
+SILO uses [Prolly](https://github.com/crabbuild/prolly) trees for
+content-addressed metadata, snapshots, and history. This repository adds the
+S3-backed repository layer and provider workflows around those trees.
+
 > **Repository status:** SILO is open source under the MIT License. The
 > repository is pre-1.0; tagged releases publish public GitHub release bundles,
 > while crates.io publication remains a separately controlled release step.

SILO-DESIGN.md

@@ -4,7 +4,8 @@
 
 SILO is a thin repository layer over a versioned S3 bucket. The client is
 the authoritative writer. It stores each file as one immutable payload and uses
-Prolly trees to track names, metadata, commits, branches, and history.
+[Prolly trees](https://github.com/crabbuild/prolly) to track names, metadata,
+commits, branches, and history.
 
 There is one durable format and one public client. The implementation does not
 dual-write, migrate, or negotiate legacy repository protocols.

client/README.md

@@ -1,8 +1,8 @@
 # SILO client
 
 The client turns a versioned S3 bucket into a branchable file repository.
-Files remain ordinary whole S3 objects under immutable derived keys; Prolly
-trees provide snapshots and history.
+Files remain ordinary whole S3 objects under immutable derived keys; [Prolly
+trees](https://github.com/crabbuild/prolly) provide snapshots and history.
 
 ## Requirements
 

core/README.md

@@ -3,7 +3,8 @@
 The AWS-independent core of [SILO](https://github.com/crabuild/silo), an
 immutable version-control ledger layered over S3-compatible object storage.
 
-This crate owns the durable repository model, Prolly-tree state, commits,
+This crate owns the durable repository model and [Prolly tree
+state](https://github.com/crabbuild/prolly), commits,
 branches, tags, journals, recovery, fsck, merge planning, and garbage
 collection. The provider adapter lives in `silo-s3-client`.