diff --git a/.github/workflows/navigator_check.yml b/.github/workflows/navigator_check.yml
index 1c36222..8ac7c54 100644
--- a/.github/workflows/navigator_check.yml
+++ b/.github/workflows/navigator_check.yml
@@ -1,9 +1,9 @@
 name: Navigator Check
 
-# Thin caller for PyAutoBuild's reusable navigator-catalogue check. The check
+# Thin caller for PyAutoHands's reusable navigator-catalogue check. The check
 # logic (path/banner lint + catalogue staleness) and its entrypoints live in
-# PyAutoBuild/autobuild; this repo only declares which generator project to run.
-# See PyAutoLabs/PyAutoBuild/.github/workflows/navigator_check.yml.
+# PyAutoHands/autobuild; this repo only declares which generator project to run.
+# See PyAutoLabs/PyAutoHands/.github/workflows/navigator_check.yml.
 
 on: [push, pull_request]
 
@@ -12,6 +12,6 @@ permissions:
 
 jobs:
   navigator:
-    uses: PyAutoLabs/PyAutoBuild/.github/workflows/navigator_check.yml@main
+    uses: PyAutoLabs/PyAutoHands/.github/workflows/navigator_check.yml@main
     with:
       project: howtofit
diff --git a/.navigator_check_ignore b/.navigator_check_ignore
index 43a1d4e..e5d7bb0 100644
--- a/.navigator_check_ignore
+++ b/.navigator_check_ignore
@@ -1,5 +1,5 @@
 # Paths exempt from the navigator path/banner checks (see
-# PyAutoBuild/autobuild/check_navigator.py). One path or glob per line.
+# PyAutoHands/autobuild/check_navigator.py). One path or glob per line.
 #
 # CLAUDE.md's "Relationship to autofit_workspace" section mentions sibling
 # autofit_workspace scripts in prose (as the next destination after a concept).
diff --git a/AGENTS.md b/AGENTS.md
index 69ced56..6ab2e25 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -36,9 +36,9 @@ and the generic `af.Model` / `af.Collection` API.
 
 On CI, every PR is gated on Python **3.12 and 3.13** by `smoke_tests.yml` (runs
 `python .github/scripts/run_smoke.py`, driven by `smoke_tests.txt` + `config/build/env_vars.yaml` —
-the definition of green), `navigator_check.yml` (PyAutoBuild's reusable navigator-catalogue check;
+the definition of green), `navigator_check.yml` (PyAutoHands's reusable navigator-catalogue check;
 see *Notebooks vs Scripts*), and `url_check.yml` (link checking). The smoke and navigator jobs check
-out **PyAutoBuild** as a sibling and run the PyAuto* libraries from the **same-named branch** of each
+out **PyAutoHands** as a sibling and run the PyAuto* libraries from the **same-named branch** of each
 source repo, so a HowToFit PR is validated against matching library branches.
 
 ## Sandboxed / restricted runs
@@ -51,17 +51,17 @@ NUMBA_CACHE_DIR=/tmp/numba_cache MPLCONFIGDIR=/tmp/matplotlib python scripts/cha
 
 ## Notebooks vs Scripts
 
-Notebooks in `notebooks/` are **generated** from the `.py` scripts via PyAutoBuild. **Always edit the
+Notebooks in `notebooks/` are **generated** from the `.py` scripts via PyAutoHands. **Always edit the
 `.py` scripts, never the `.ipynb` directly.** The `# %%` marker alternates code and markdown cells.
 Regenerate from the repo root:
 
 ```bash
-PYTHONPATH=../PyAutoBuild/autobuild python3 ../PyAutoBuild/autobuild/generate.py howtofit
+PYTHONPATH=../PyAutoHands/autobuild python3 ../PyAutoHands/autobuild/generate.py howtofit
 ```
 
-The `howtofit` project target is registered in PyAutoBuild (`run_all.py`, `navigator.py`, `config/`).
+The `howtofit` project target is registered in PyAutoHands (`run_all.py`, `navigator.py`, `config/`).
 The navigator catalogue — `llms-full.txt` + `workspace_index.json` — is what `navigator_check.yml`
-gates; it is rebuilt by the same PyAutoBuild generate/merge flow that builds the notebooks. Commit
+gates; it is rebuilt by the same PyAutoHands generate/merge flow that builds the notebooks. Commit
 regenerated notebooks and catalogue alongside the script changes.
 
 ## Bulk-edit safety
@@ -74,7 +74,7 @@ write from a header skim silently deletes every section below the header.
 
 - `../PyAutoFit` — source library.
 - `../autofit_workspace` — the user-facing workspace (tutorials point here as the next destination).
-- `../PyAutoBuild` — notebook generation + CI tooling.
+- `../PyAutoHands` — notebook generation + CI tooling.
 
 ## Task Workflows
 
@@ -84,11 +84,9 @@ entries until the summary passes; regenerate notebooks + catalogue after. **Gene
 only files in `scripts/` (never `notebooks/`), preserve docstrings and explanations, test, then
 regenerate. Flag any change that affects `autofit_workspace` or PyAutoFit in your PR.
 
-<!-- repos_sync:history:begin -->
 ## Never rewrite history
 
 Never rewrite pushed history on any repo with a remote — no `git init` over a
 tracked repo, no force-push to `main`, no fresh-start "Initial commit", no
 `filter-repo` / `filter-branch` / `rebase -i` on pushed branches. To get a
 clean tree: `git fetch origin && git reset --hard origin/main && git clean -fd`.
-<!-- repos_sync:history:end -->
diff --git a/README.md b/README.md
index d0c437a..fd388ec 100644
--- a/README.md
+++ b/README.md
@@ -67,9 +67,9 @@ Before starting chapter 1, open `start_here.py` for a one-page overview of the s
 
 ## Notebooks vs Scripts
 
-Notebooks in `notebooks/` are generated from the Python files in `scripts/`. **Always edit the \`\`.py\`\`
+Notebooks in `notebooks/` are generated from the Python files in `scripts/`. **Always edit the ``.py``
 scripts, never the notebooks directly.** The `# %%` markers in each script alternate between code and
-markdown cells, which [PyAutoBuild](https://github.com/PyAutoLabs/PyAutoBuild) uses to produce the
+markdown cells, which [PyAutoHands](https://github.com/PyAutoLabs/PyAutoHands) uses to produce the
 `.ipynb` files.
 
 ## Relationship to autofit_workspace
diff --git a/config/build/markdown_examples.yaml b/config/build/markdown_examples.yaml
index 8b4783a..43c75ef 100644
--- a/config/build/markdown_examples.yaml
+++ b/config/build/markdown_examples.yaml
@@ -1,5 +1,5 @@
 # Curated examples rendered to executed markdown pages (markdown/) with real
-# output images, for GitHub browsing. Built by PyAutoBuild's generate_markdown.py
+# output images, for GitHub browsing. Built by PyAutoHands's generate_markdown.py
 # (never TEST_MODE; features/ never rendered; order = execution + index order).
 # Batch 2b: chapter_1_introduction (the intro lecture, in reading order).
 - script: scripts/chapter_1_introduction/start_here.py
diff --git a/llms-full.txt b/llms-full.txt
index 450d981..f650add 100644
--- a/llms-full.txt
+++ b/llms-full.txt
@@ -1,4 +1,4 @@
-AUTO-GENERATED by PyAutoBuild — do not edit by hand; regenerate with generate.py.
+AUTO-GENERATED by PyAutoHands — do not edit by hand; regenerate with generate.py.
 
 # HowToFit Lectures — Full Catalogue
 
diff --git a/markdown/README.md b/markdown/README.md
index d5a67a2..14dadaa 100644
--- a/markdown/README.md
+++ b/markdown/README.md
@@ -9,4 +9,4 @@ Every page below is the corresponding example script **fully executed**, rendere
 - [Tutorial 4: Why Modeling Is Hard](chapter_1_introduction/tutorial_4_why_modeling_is_hard.md) — from `scripts/chapter_1_introduction/tutorial_4_why_modeling_is_hard.py`
 - [Tutorial 5: Results And Samples](chapter_1_introduction/tutorial_5_results_and_samples.md) — from `scripts/chapter_1_introduction/tutorial_5_results_and_samples.py`
 
-These pages are regenerated manually by PyAutoBuild's `generate_markdown.py` when a curated script changes.
+These pages are regenerated manually by PyAutoHands's `generate_markdown.py` when a curated script changes.