diff --git a/.gitattributes b/.gitattributes
index dc316e45b..178c9ab40 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +1,32 @@
+# Normalize text files automatically
+* text=auto
+
+# Source files use LF
+*.py text eol=lf
+*.js text eol=lf
+*.jsx text eol=lf
+*.ts text eol=lf
+*.tsx text eol=lf
+*.json text eol=lf
+*.yml text eol=lf
+*.yaml text eol=lf
+*.md text eol=lf
 *.sh text eol=lf
 infra/docker/*.sh text eol=lf
 scripts/*.sh text eol=lf
+
+# Windows scripts use CRLF
+*.bat text eol=crlf
+*.cmd text eol=crlf
+*.ps1 text eol=crlf
+
+# Binary files
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.woff binary
+*.woff2 binary
+*.ttf binary
+*.eot binary
diff --git a/.learnings/ERRORS.md b/.learnings/ERRORS.md
index f05167b91..da85d534c 100644
--- a/.learnings/ERRORS.md
+++ b/.learnings/ERRORS.md
@@ -73,3 +73,30 @@ Recover host first, stop residual build/runner tasks, verify production/staging
 - Errors: main branch is protected from direct push; local main had divergence/conflicts; tag v0.1.51 was pushed from the wrong local main HEAD and then removed.
 - Fix: never tag production before protected main has accepted the release commit. Use PR/approved merge path or Gitea API merge, then tag the actual merged main commit.
 
+
+## 2026-06-25 - No local Gitea/GitHub CLI in Windows workspace
+
+- Failed command: gh --version / tea --version / gitea --version during release automation.
+- Error: commands not found in PowerShell runtime.
+- Fix: use Gitea API/server-side tools when available, or the web PR flow for protected-branch releases.
+
+
+## 2026-06-25 - Gitea generated token returned API 401
+
+- Failed operation: create release PR via server-side generated Gitea access token.
+- Error: API returned 401 on authenticated pull request query/create.
+- Fix: verify token output/scopes/API auth behavior before using; do not print secrets, and delete temporary tokens after failed attempts.
+
+
+## 2026-06-25 - Business Gitea host lacks runtime-builder SSH key for ref sync
+
+- Failed command: git fetch from git.xiaoxiajianji.com:2222 inside /var/lib/gitea/data/gitea-repositories using /root/.ssh/xiaoxia_runtime_builder.
+- Error: identity file missing and Permission denied (publickey).
+- Fix: do not install keys ad hoc on the business host; use an already-authenticated local clone bundle or proper Git/Gitea maintenance path to sync refs.
+
+
+## 2026-06-25 - Non-ASCII comments in .gitattributes broke Git attribute parsing
+
+- Error: Git printed 'is not a valid attribute name' for Chinese comment text in .gitattributes during merge/fetch operations.
+- Fix: keep .gitattributes comments/rules ASCII-only and preserve the LF/CRLF normalization semantics.
+