diff --git a/.claude/agent-memory/review-review-issue-fixer/MEMORY.md b/.claude/agent-memory/review-review-issue-fixer/MEMORY.md
new file mode 100644
index 0000000..4a794a8
--- /dev/null
+++ b/.claude/agent-memory/review-review-issue-fixer/MEMORY.md
@@ -0,0 +1,3 @@
+# Agent Memory Index
+
+- [project_firestore_adapter.md](project_firestore_adapter.md) — Firestore adapter fix patterns and decisions for this PR
diff --git a/.claude/agent-memory/review-review-issue-fixer/project_firestore_adapter.md b/.claude/agent-memory/review-review-issue-fixer/project_firestore_adapter.md
new file mode 100644
index 0000000..ec4e840
--- /dev/null
+++ b/.claude/agent-memory/review-review-issue-fixer/project_firestore_adapter.md
@@ -0,0 +1,19 @@
+---
+name: Firestore adapter fix patterns
+description: Fix patterns and design decisions applied during PR review for the @please-auth/firestore adapter
+type: project
+---
+
+Key fix decisions applied to this adapter:
+
+1. **Fail-closed defaults**: `matchesClientFilter` default changed to `return false`; `applyOperator` default changed to `return null` (forces client-side). Unknown operators should never silently pass records.
+
+2. **Transaction-aware bulk operations**: `updateMany`/`deleteMany` now check the `transaction` closure variable and use `transaction.update()`/`transaction.delete()` per-doc instead of `db.batch()` when inside a transaction.
+
+3. **Batch partial-failure error enrichment**: `batchDelete`/`batchUpdate` wrap each `batch.commit()` in try-catch and throw an error with `committedCount` and `totalCount` properties.
+
+4. **No re-read after create**: `create()` returns data directly using `docToRecord(id, docData, mapper)` instead of doing a redundant `docRef.get()` after `docRef.set()`.
+
+5. **Custom model name warning**: `getCollectionRef` default case logs a `console.warn` for unknown model names before the passthrough, since better-auth plugins may use custom collections.
+
+**Why:** These fixes reduce Firestore read costs, ensure correctness inside transactions, and make the adapter fail-closed rather than fail-open on unknown operators.
diff --git a/.claude/agent-memory/review-review-security-reviewer/MEMORY.md b/.claude/agent-memory/review-review-security-reviewer/MEMORY.md
new file mode 100644
index 0000000..b02c021
--- /dev/null
+++ b/.claude/agent-memory/review-review-security-reviewer/MEMORY.md
@@ -0,0 +1,3 @@
+# Agent Memory Index
+
+- [project_firestore_adapter.md](./project_firestore_adapter.md) — Firestore adapter for better-auth: architecture, security patterns, and key findings
diff --git a/.claude/agent-memory/review-review-security-reviewer/project_firestore_adapter.md b/.claude/agent-memory/review-review-security-reviewer/project_firestore_adapter.md
new file mode 100644
index 0000000..a348965
--- /dev/null
+++ b/.claude/agent-memory/review-review-security-reviewer/project_firestore_adapter.md
@@ -0,0 +1,27 @@
+---
+name: project_firestore_adapter
+description: Firestore adapter for better-auth — architecture, security review findings, and key patterns
+type: project
+---
+
+This is a new Firestore adapter package for the better-auth library (branch: amondnet/minsu-lee/add-firestore-adatper).
+
+Key files:
+- packages/firestore/src/adapter.ts — main adapter logic (CRUD operations)
+- packages/firestore/src/utils.ts — where clause processing, field mapping, batch ops
+- packages/firestore/src/firestore.ts — Firebase app init helper
+- packages/firestore/src/types.ts — config types, snake_case field maps
+
+**Why:** Adding Firestore as a supported database backend for better-auth.
+
+**How to apply:** Security review was performed 2026-03-24. Key findings:
+
+1. IMPORTANT: `updateMany` and `deleteMany` have no result limit on the initial Firestore query (query.get() without .limit()), allowing unbounded reads that can be weaponized for DoS if `where` clauses don't match at the Firestore layer and fall through to client-side filtering. See adapter.ts lines 301-302 and 361-362.
+
+2. IMPORTANT: `getCollectionRef` falls through to `db.collection(model)` for unknown model names, meaning any unvalidated model name from the adapter interface is used directly as a Firestore collection path. See utils.ts line 84.
+
+3. IMPORTANT (design): `findOne` with client-side filters fetches up to 100 docs from Firestore when clientFilters are present (adapter.ts line 141). No upper bound validation means large fetch windows on complex queries.
+
+4. No hardcoded secrets or credentials found. Credential handling delegates entirely to Firebase Admin SDK (Application Default Credentials or explicit AppOptions).
+
+5. The `matchesClientFilter` default case returns `true` (utils.ts line 288), meaning unknown operators silently allow all records through — a logic bypass if new operators are added to CleanedWhere without updating the switch.
diff --git a/.gitignore b/.gitignore
index 2ec158c..ddfdb10 100644
--- a/.gitignore
+++ b/.gitignore
@@ -234,6 +234,9 @@ Network Trash Folder
 Temporary Items
 .apdisk
 
+### Please state
+.please/state/
+
 ### Turborepo
 .turbo
 
diff --git a/.mise.toml b/.mise.toml
index 6cc01cc..2a35271 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -9,5 +9,9 @@ run = "bunx --bun commitlint --edit"
 description = "Set up git hooks"
 run = """
 bun install
-mise generate git-pre-commit --hook commit-msg --task commit-msg --write
+if [ -d .git ]; then
+  mise generate git-pre-commit --hook commit-msg --task commit-msg --write
+else
+  echo "Skipping hook setup (worktree detected)"
+fi
 """
diff --git a/commitlint.config.js b/commitlint.config.js
deleted file mode 100644
index 86f2f5e..0000000
--- a/commitlint.config.js
+++ /dev/null
@@ -1,6 +0,0 @@
-module.exports = {
-  extends: ['@commitlint/config-conventional', '@commitlint/config-workspace-scopes'],
-  rules: {
-    'subject-case': [0],
-  },
-};