docs: remove repo-rename callout notes from about-files

Drop the "Renamed from ..." blockquote callouts and dedicated rename
sections from AGENTS.md / CLAUDE.md / README.md / index.md to reduce
length for agent context. Functional compat docs (bibliography symlink,
audit provenance) are retained.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: 2 people

AGENTS.md

@@ -5,9 +5,6 @@ discovering this repository. It is the canonical description of PyAutoBrain —
 **reasoning layer** of the PyAuto organism — and of the Brain / Heart / Build
 boundary; PyAutoBuild and PyAutoHeart point back here.
 
-> Renamed from **PyAutoAgent** to **PyAutoBrain**. The CLI is now `pyauto-brain`;
-> the former `pyauto-agent` shim has been removed. See "Renamed from PyAutoAgent".
-
 ## What this repo is
 
 PyAutoBrain is the **reasoning layer** of the PyAuto ecosystem as it grows into a
@@ -185,18 +182,6 @@ Like the other PyAuto repos, PyAutoBrain runs from its checkout (no pip install)
 it resolves the sibling `pyauto-heart` and `autobuild` binaries from PATH or the
 `~/Code/PyAutoLabs/` checkouts.
 
-## Renamed from PyAutoAgent
-
-This repository was previously **PyAutoAgent**. The rename to **PyAutoBrain**
-reflects the organism model above: it is the reasoning layer, not just a host of
-"agents". The compatibility shims kept during the rename have since been removed,
-now that every caller is migrated:
-
-- `bin/pyauto-brain` is the canonical (and only) CLI; the former `bin/pyauto-agent`
-  forwarding shim has been removed.
-- The sibling health authority moved from `pyauto-pulse`/PyAutoPulse to
-  `pyauto-heart`/PyAutoHeart; its `pyauto-pulse` shim has likewise been removed.
-
 ## Never rewrite history
 
 NEVER perform these operations on any repo with a remote:

CLAUDE.md

@@ -4,6 +4,3 @@ Read [`AGENTS.md`](AGENTS.md) in this directory. It is the shared source of trut
 for PyAutoBrain — the reasoning layer of the PyAuto organism — for the
 Brain / Heart / Build boundary, and for how the specialist reasoning agents in
 this repo work.
-
-> This repository was renamed from **PyAutoAgent** to **PyAutoBrain**. The CLI is
-> now `pyauto-brain` (the former `pyauto-agent` back-compat shim has been removed).

README.md

@@ -8,9 +8,6 @@ and delegate execution to [PyAutoBuild](https://github.com/PyAutoLabs/PyAutoBuil
 It owns no state, no health checks, and no release mechanics — it only reasons
 and delegates.
 
-> Renamed from **PyAutoAgent**. The canonical CLI is now `pyauto-brain`;
-> the former `pyauto-agent` back-compat shim has been removed.
-
 ## The organism
 
 The PyAuto ecosystem is a software organism; each repo is an organ with one job: