diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..20e8d51
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,99 @@
+# Likewise - Floating Point Diff Implementation
+
+## Codebase Structure
+
+```
+src/
+├── lib.rs              # Main entry, re-exports
+├── types.rs            # DiffOp, Change, ChangeTag, Algorithm enums
+├── common.rs           # capture_diff_slices(), get_diff_ratio()
+├── algorithms/         # myers.rs, patience.rs, lcs.rs, hook.rs, utils.rs
+├── text/              # TextDiff, DiffableStr trait
+├── udiff.rs           # Unified diff output
+└── utils.rs           # Text utilities
+```
+
+## Current Diff Flow
+
+1. `capture_diff_slices(alg, &old, &new)` → `Vec<DiffOp>`
+2. `DiffOp::iter_changes(&old, &new)` → `Iterator<Change<T>>`
+3. Requires `T: Hash + Eq + Ord`
+
+## Key Types
+
+```rust
+pub enum DiffOp {
+    Equal { old_index: usize, new_index: usize, len: usize },
+    Delete { old_index: usize, old_len: usize, new_index: usize },
+    Insert { old_index: usize, new_index: usize, new_len: usize },
+    Replace { old_index: usize, old_len: usize, new_index: usize, new_len: usize },
+}
+
+pub struct Change<T> {
+    pub(crate) tag: ChangeTag,
+    pub(crate) old_index: Option<usize>,
+    pub(crate) new_index: Option<usize>, 
+    pub(crate) value: T,
+}
+```
+
+## Algorithm Trait
+
+```rust
+pub trait DiffHook {
+    type Error;
+    fn equal(&mut self, old: usize, new: usize, len: usize) -> Result<(), Self::Error>;
+    fn delete(&mut self, old: usize, old_len: usize, new: usize) -> Result<(), Self::Error>;
+    fn insert(&mut self, old: usize, new: usize, new_len: usize) -> Result<(), Self::Error>;
+    fn replace(&mut self, old: usize, old_len: usize, new: usize, new_len: usize) -> Result<(), Self::Error>;
+}
+```
+
+## Task: FP Comparison
+
+Add eps/ulps floating point comparison for f32/f64 slices.
+
+### Implementation Points
+
+1. **New comparison trait** alongside existing `PartialEq` requirement
+2. **Algorithm modification** to use FP-aware comparison in core loops
+3. **API surface** for specifying epsilon/ulps parameters  
+4. **Testing** edge cases: NaN, infinity, subnormals, precision boundaries
+
+### Files to Modify
+
+- `src/algorithms/myers.rs` - Core comparison logic
+- `src/algorithms/patience.rs` - Core comparison logic  
+- `src/algorithms/lcs.rs` - Core comparison logic
+- `src/common.rs` - Add FP-aware `capture_diff_slices_fp()`
+- `examples/floating_point.rs` - Usage demonstration
+
+### Example Usage Goal
+
+```rust
+let old = vec![1.0, 2.0, 3.0];
+let new = vec![1.000001, 2.0, 3.1];
+
+// Absolute epsilon
+let ops = capture_diff_slices_fp_eps(Algorithm::Myers, &old, &new, 0.0001);
+
+// Relative ulps  
+let ops = capture_diff_slices_fp_ulps(Algorithm::Myers, &old, &new, 4);
+```
+
+### Testing Strategy
+
+Use existing `insta` snapshot testing framework. Test matrices:
+- Normal values with various epsilon/ulps settings
+- Edge cases: ±0.0, NaN, ±infinity
+- Precision boundaries and subnormal values
+- Mixed normal/edge case arrays
+
+### Status
+
+- [x] CI fixed (Rust 1.66 MSRV)
+- [x] Codebase analysis complete
+- [ ] Design FP comparison API
+- [ ] Implement core FP comparison logic
+- [ ] Add comprehensive tests
+- [ ] Create usage examples
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 04a2e24..6f514c5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ edition = "2018"
 rust-version = "1.66"
 license = "Apache-2.0"
 description = "A diff library for Rust (fork of similar)"
-repository = "https://github.com/barrett-ruth/likewise"
+repository = "https://github.com/barrettruth/likewise"
 keywords = ["diff", "difference", "patience", "compare", "changes"]
 readme = "README.md"
 exclude = ["assets/*"]
diff --git a/README.md b/README.md
index 1e3576a..b2e6f5f 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 > This crate is a fork of [similar](https://github.com/mitsuhiko/similar) library, which, as of 11/9/25, is rather inactive.
 
 [![Crates.io](https://img.shields.io/crates/d/likewise.svg)](https://crates.io/crates/likewise)
-[![License](https://img.shields.io/github/license/barrett-ruth/likewise)](https://github.com/barrett-ruth/likewise/blob/main/LICENSE)
+[![License](https://img.shields.io/github/license/barrettruth/likewise)](https://github.com/barrett-ruth/likewise/blob/main/LICENSE)
 [![rustc 1.66.0](https://img.shields.io/badge/rust-1.66%2B-orange.svg)](https://img.shields.io/badge/rust-1.65%2B-orange.svg)
 [![Documentation](https://docs.rs/likewise/badge.svg)](https://docs.rs/likewise)
 
@@ -58,6 +58,6 @@ fn main() {
 ## License and Links
 
 * [Documentation](https://docs.rs/likewise/)
-* [Issue Tracker](https://github.com/barrett-ruth/likewise/issues)
-* [Examples](https://github.com/barrett-ruth/likewise/tree/main/examples)
-* License: [Apache-2.0](https://github.com/barrett-ruth/likewise/blob/main/LICENSE)
+* [Issue Tracker](https://github.com/barrettruth/likewise/issues)
+* [Examples](https://github.com/barrettruth/likewise/tree/main/examples)
+* License: [Apache-2.0](https://github.com/barrettruth/likewise/blob/main/LICENSE)